Build
-----
-- Issue #10325: Fix two issues in the fallback definitions for PY_ULLONG_MAX and
- PY_LLONG_MAX that made them unsuitable for use in preprocessor conditionals.
-
-Documentation
--------------
-
-- Issue #10299: List the built-in functions in a table in functions.rst.
-
-
-What's New in Python 3.2 Alpha 4?
-=================================
-
-*Release date: 13-Nov-2010*
-
-Core and Builtins
------------------
-
-- Issue #10372: Import the warnings module only after the IO library is
- initialized, so as to avoid bootstrap issues with the '-W' option.
-
-- Issue #10293: Remove obsolete field in the PyMemoryView structure, unused
- undocumented value PyBUF_SHADOW, and strangely-looking code in
- PyMemoryView_GetContiguous.
-
-- Issue #6081: Add str.format_map(), similar to ``str.format(**mapping)``.
-
-- If FileIO.__init__ fails, close the file descriptor.
-
-- Issue #10221: dict.pop(k) now has a key error message that includes the
- missing key (same message d[k] returns for missing keys).
+- Issue #15298: ensure _sysconfigdata is generated in build directory, not
+ source directory.
-- Issue #5437: A preallocated MemoryError instance should not keep traceback
- data (including local variables caught in the stack trace) alive infinitely.
+- Issue #15833: Fix a regression in 3.3 that resulted in exceptions being
+ raised if importlib failed to write byte-compiled files. This affected
+ attempts to build Python out-of-tree from a read-only source directory.
-- Issue #10186: Fix the SyntaxError caret when the offset is equal to the length
- of the offending line.
+- Issue #15923: Fix a mistake in ``asdl_c.py`` that resulted in a TypeError
+ after 2801bf875a24 (see #15801).
-- Issue #10089: Add support for arbitrary -X options on the command line. They
- can be retrieved through a new attribute ``sys._xoptions``.
+- Issue #15819: Make sure we can build Python out-of-tree from a read-only
+ source directory. (Somewhat related to issue #9860.)
-- Issue #4388: On Mac OS X, decode command line arguments from UTF-8, instead of
- the locale encoding. If the LANG (and LC_ALL and LC_CTYPE) environment
- variable is not set, the locale encoding is ISO-8859-1, whereas most programs
- (including Python) expect UTF-8. Python already uses UTF-8 for the filesystem
- encoding and to encode command line arguments on this OS.
-
-- Issue #9713, #10114: Parser functions (e.g. PyParser_ASTFromFile) expect
- filenames encoded to the filesystem encoding with the surrogateescape error
- handler (to support undecodable bytes), instead of UTF-8 in strict mode.
+Documentation
+-------------
-- Issue #9997: Don't let the name "top" have special significance in scope
- resolution.
+- Additional comments and some style changes in the concurrent.futures URL
+ retrieval example
-- Issue #9862: Compensate for broken PIPE_BUF in AIX by hard coding its value as
- the default 512 when compiling on AIX.
+- Issue #16115: Improve subprocess.Popen() documentation around args, shell,
+ and executable arguments.
-- Use locale encoding instead of UTF-8 to encode and decode filenames if
- Py_FileSystemDefaultEncoding is not set.
+- Issue #15533: Clarify docs and add tests for `subprocess.Popen()`'s cwd
+ argument.
-- Issue #10095: fp_setreadl() doesn't reopen the file, instead reuse the file
- descriptor.
+- Issue #15979: Improve timeit documentation.
-- Issue #9418: Moved private string methods ``_formatter_parser`` and
- ``_formatter_field_name_split`` into a new ``_string`` module.
+- Issue #16036: Improve documentation of built-in `int()`'s signature and
+ arguments.
-- Issue #9992: Remove PYTHONFSENCODING environment variable.
+- Issue #15935: Clarification of `argparse` docs, re: add_argument() type and
+ default arguments. Patch contributed by Chris Jerdonek.
-Library
--------
+- Issue #11964: Document a change in v3.2 to the behavior of the indent
+ parameter of json encoding operations.
-- Issue #10465: fix broken delegating of attributes by gzip._PaddedFile.
+Tools/Demos
+-----------
-- Issue #10356: Decimal.__hash__(-1) should return -2.
+- Issue #15378: Fix Tools/unicode/comparecodecs.py. Patch by Serhiy Storchaka.
-- Issue #1553375: logging: Added stack_info kwarg to display stack information.
-- Issue #5111: IPv6 Host in the Header is wrapped inside [ ]. Patch by Chandru.
+What's New in Python 3.3.0?
+===========================
-- Fix Fraction.__hash__ so that Fraction.__hash__(-1) is -2. (See also issue
- #10356.)
+*Release date: 29-Sep-2012*
-- Issue #4471: Add the IMAP.starttls() method to enable encryption on standard
- IMAP4 connections. Original patch by Lorenzo M. Catucci.
+Core and Builtins
+-----------------
-- Issue #1466065: Add 'validate' option to base64.b64decode to raise an error if
- there are non-base64 alphabet characters in the input.
+- Issue #16046: Fix loading sourceless legacy .pyo files.
-- Issue #10386: Add __all__ to token module; this simplifies importing in
- tokenize module and prevents leaking of private names through ``import *``.
+- Issue #16060: Fix refcounting bug when `__trunc__()` returns an object whose
+ `__int__()` gives a non-integer. Patch by Serhiy Storchaka.
-- Issue #4471: Properly shutdown socket in IMAP.shutdown(). Patch by Lorenzo
- M. Catucci.
+Extension Modules
+-----------------
-- Fix IMAP.login() to work properly.
+- Issue #16012: Fix a regression in pyexpat. The parser's `UseForeignDTD()`
+ method doesn't require an argument again.
-- Issue #9244: multiprocessing pool worker processes could terminate
- unexpectedly if the return value of a task could not be pickled. Only the
- ``repr`` of such errors are now sent back, wrapped in an
- ``MaybeEncodingError`` exception.
-- Issue #9244: The ``apply_async()`` and ``map_async()`` methods of
- ``multiprocessing.Pool`` now accepts a ``error_callback`` argument. This can
- be a callback with the signature ``callback(exc)``, which will be called if
- the target raises an exception.
+What's New in Python 3.3.0 Release Candidate 3?
+===============================================
-- Issue #10022: The dictionary returned by the ``getpeercert()`` method of SSL
- sockets now has additional items such as ``issuer`` and ``notBefore``.
+*Release date: 23-Sep-2012*
-- ``usenetrc`` is now false by default for NNTP objects.
+Core and Builtins
+-----------------
-- Issue #1926: Add support for NNTP over SSL on port 563, as well as STARTTLS.
- Patch by Andrew Vant.
+- Issue #15900: Fix reference leak in `PyUnicode_TranslateCharmap()`.
-- Issue #10335: Add tokenize.open(), detect the file encoding using
- tokenize.detect_encoding() and open it in read only mode.
+- Issue #15926: Fix crash after multiple reinitializations of the interpreter.
-- Issue #10321: Add support for binary data to smtplib.SMTP.sendmail, and a new
- method send_message to send an email.message.Message object.
+- Issue #15895: Fix FILE pointer leak in one error branch of
+ `PyRun_SimpleFileExFlags()` when filename points to a pyc/pyo file, closeit is
+ false an and set_main_loader() fails.
-- Issue #6011: sysconfig and distutils.sysconfig use the surrogateescape error
- handler to parse the Makefile file. Avoid a UnicodeDecodeError if the source
- code directory name contains a non-ASCII character and the locale encoding is
- ASCII.
+- Fixes for a few crash and memory leak regressions found by Coverity.
-- Issue #10329: The trace module writes reports using the input Python script
- encoding, instead of the locale encoding. Patch written by Alexander
- Belopolsky.
+Library
+-------
-- Issue #10126: Fix distutils' test_build when Python was built with
- --enable-shared.
+- Issue #15882: Change `_decimal` to accept any coefficient tuple when
+ constructing infinities. This is done for backwards compatibility with
+ decimal.py: Infinity coefficients are undefined in _decimal (in accordance
+ with the specification).
-- Issue #9281: Prevent race condition with mkdir in distutils. Patch by
- Arfrever.
+- Issue #15925: Fix a regression in `email.util` where the `parsedate()` and
+ `parsedate_tz()` functions did not return None anymore when the argument could
+ not be parsed.
-- Issue #10229: Fix caching error in gettext.
+Extension Modules
+-----------------
-- Issue #10252: Close file objects in a timely manner in distutils code and
- tests. Patch by Brian Brazil, completed by Éric Araujo.
+- Issue #15973: Fix a segmentation fault when comparing datetime timezone
+ objects.
-- Issue #10180: Pickling file objects is now explicitly forbidden, since
- unpickling them produced nonsensical results.
+- Issue #15977: Fix memory leak in Modules/_ssl.c when the function
+ _set_npn_protocols() is called multiple times, thanks to Daniel Sommermann.
-- Issue #10311: The signal module now restores errno before returning from its
- low-level signal handler. Patch by Hallvard B Furuseth.
+- Issue #15969: `faulthandler` module: rename dump_tracebacks_later() to
+ dump_traceback_later() and cancel_dump_tracebacks_later() to
+ cancel_dump_traceback_later().
-- Issue #10282: Add a ``nntp_implementation`` attribute to NNTP objects.
+- _decimal module: use only C 89 style comments.
-- Issue #10283: Add a ``group_pattern`` argument to NNTP.list().
-- Issue #10155: Add IISCGIHandler to wsgiref.handlers to support IIS CGI
- environment better, and to correct unicode environment values for WSGI 1.0.1.
+What's New in Python 3.3.0 Release Candidate 2?
+===============================================
-- Issue #10281: nntplib now returns None for absent fields in the OVER/XOVER
- response, instead of raising an exception.
+*Release date: 09-Sep-2012*
-- wsgiref now implements and validates PEP 3333, rather than an experimental
- extension of PEP 333. (Note: earlier versions of Python 3.x may have
- incorrectly validated some non-compliant applications as WSGI compliant; if
- your app validates with Python <3.2b1+, but not on this version, it is likely
- the case that your app was not compliant.)
+Core and Builtins
+-----------------
-- Issue #10280: NNTP.nntp_version should reflect the highest version advertised
- by the server.
+- Issue #13992: The trashcan mechanism is now thread-safe. This eliminates
+ sporadic crashes in multi-thread programs when several long deallocator chains
+ ran concurrently and involved subclasses of built-in container types.
-- Issue #10184: Touch directories only once when extracting a tarfile.
+- Issue #15784: Modify `OSError`.__str__() to better distinguish between errno
+ error numbers and Windows error numbers.
-- Issue #10199: New package, ``turtledemo`` now contains selected demo scripts
- that were formerly found under Demo/turtle.
+- Issue #15781: Fix two small race conditions in import's module locking.
-- Issue #10265: Close file objects explicitly in sunau. Patch by Brian Brazil.
+Library
+-------
-- Issue #10266: uu.decode didn't close in_file explicitly when it was given as a
- filename. Patch by Brian Brazil.
+- Issue #15847: Fix a regression in argparse, which did not accept tuples as
+ argument lists anymore.
-- Issue #10110: Queue objects didn't recognize full queues when the maxsize
- parameter had been reduced.
+- Issue #15828: Restore support for C extensions in `imp.load_module()`.
-- Issue #10160: Speed up operator.attrgetter. Patch by Christos Georgiou.
+- Issue #15340: Fix importing the random module when ``/dev/urandom`` cannot be
+ opened. This was a regression caused by the hash randomization patch.
-- logging: Added style option to basicConfig() to allow %, {} or $-formatting.
+- Issue #10650: Deprecate the watchexp parameter of the `Decimal.quantize()`
+ method.
-- Issue #5729: json.dumps() now supports using a string such as '\t' for
- pretty-printing multilevel objects.
+- Issue #15785: Modify `window.get_wch()` API of the curses module: return a
+ character for most keys, and an integer for special keys, instead of always
+ returning an integer. So it is now possible to distinguish special keys like
+ keypad keys.
-- Issue #10253: FileIO leaks a file descriptor when trying to open a file for
- append that isn't seekable. Patch by Brian Brazil.
+- Issue #14223: Fix `window.addch()` of the curses module for special characters
+ like curses.ACS_HLINE: the Python function addch(int) and addch(bytes) is now
+ calling the C function waddch()/mvwaddch() (as it was done in Python 3.2),
+ instead of wadd_wch()/mvwadd_wch(). The Python function addch(str) is still
+ calling the C function wadd_wch()/mvwadd_wch() if the Python curses is linked
+ to libncursesw.
-- Support context manager protocol for file-like objects returned by mailbox
- ``get_file()`` methods.
+Build
+-----
-- Issue #10246: uu.encode didn't close file objects explicitly when filenames
- were given to it. Patch by Brian Brazil.
+- Issue #15822: Really ensure 2to3 grammar pickles are properly installed
+ (replaces fixes for Issue #15645).
-- Issue #10198: fix duplicate header written to wave files when writeframes() is
- called without data.
+Documentation
+-------------
-- Close file objects in modulefinder in a timely manner.
+- Issue #15814: The memoryview enhancements in 3.3.0 accidentally permitted the
+ hashing of multi-dimensional memorviews and memoryviews with multi-byte item
+ formats. The intended restrictions have now been documented - they will be
+ correctly enforced in 3.3.1.
-- Close a io.TextIOWrapper object in email.parser in a timely manner.
-- Close a file object in distutils.sysconfig in a timely manner.
+What's New in Python 3.3.0 Release Candidate 1?
+===============================================
-- Close a file object in pkgutil in a timely manner.
+*Release date: 25-Aug-2012*
-- Issue #10233: Close file objects in a timely manner in the tarfile module and
- its test suite.
+Core and Builtins
+-----------------
-- Issue #10093: ResourceWarnings are now issued when files and sockets are
- deallocated without explicit closing. These warnings are silenced by default,
- except in pydebug mode.
+- Issue #15573: memoryview comparisons are now performed by value with full
+ support for any valid struct module format definition.
-- tarfile.py: Add support for all missing variants of the GNU sparse extensions
- and create files with holes when extracting sparse members.
+- Issue #15316: When an item in the fromlist for `__import__()` doesn't exist,
+ don't raise an error, but if an exception is raised as part of an import do
+ let that propagate.
-- Issue #10218: Return timeout status from ``Condition.wait`` in threading.
+- Issue #15778: Ensure that ``str(ImportError(msg))`` returns a str even when
+ msg isn't a str.
-- Issue #7351: Add ``zipfile.BadZipFile`` spelling of the exception name and
- deprecate the old name ``zipfile.BadZipfile``.
+- Issue #2051: Source file permission bits are once again correctly copied to
+ the cached bytecode file. (The migration to importlib reintroduced this
+ problem because these was no regression test. A test has been added as part of
+ this patch)
-- Issue #5027: The standard ``xml`` namespace is now understood by
- xml.sax.saxutils.XMLGenerator as being bound to
- http://www.w3.org/XML/1998/namespace. Patch by Troy J. Farrell.
+- Issue #15761: Fix crash when ``PYTHONEXECUTABLE`` is set on Mac OS X.
-- Issue #5975: Add csv.unix_dialect class.
+- Issue #15726: Fix incorrect bounds checking in PyState_FindModule. Patch by
+ Robin Schreiber.
-- Issue #7761: telnetlib.interact failures on Windows fixed.
+- Issue #15604: Update uses of `PyObject_IsTrue()` to check for and handle
+ errors correctly. Patch by Serhiy Storchaka.
-- logging: Added style option to Formatter to allow %, {} or $-formatting.
+- Issue #14846: `importlib.FileFinder` now handles the case where the directory
+ being searched is removed after a previous import attempt.
-- Issue #5178: Added tempfile.TemporaryDirectory class that can be used as a
- context manager.
+Library
+-------
-- Issue #1349106: Generator (and BytesGenerator) flatten method and Header
- encode method now support a 'linesep' argument.
+- Issue #13370: Ensure that ctypes works on Mac OS X when Python is compiled
+ using the clang compiler.
-- Issue #5639: Add a *server_hostname* argument to ``SSLContext.wrap_socket`` in
- order to support the TLS SNI extension. ``HTTPSConnection`` and ``urlopen()``
- also use this argument, so that HTTPS virtual hosts are now supported.
+- Issue #13072: The array module's 'u' format code is now deprecated and will be
+ removed in Python 4.0.
-- Issue #10166: Avoid recursion in pstats Stats.add() for many stats items.
+- Issue #15544: Fix Decimal.__float__ to work with payload-carrying NaNs.
-- Issue #10163: Skip unreadable registry keys during mimetypes initialization.
+- Issue #15776: Allow pyvenv to work in existing directory with --clean.
-- logging: Made StreamHandler terminator configurable.
+- Issue #15249: email's BytesGenerator now correctly mangles From lines (when
+ requested) even if the body contains undecodable bytes.
-- logging: Allowed filters to be just callables.
+- Issue #15777: Fix a refleak in _posixsubprocess.
-- logging: Added tests for _logRecordClass changes.
+- Issue ##665194: Update `email.utils.localtime` to use datetime.astimezone and
+ correctly handle historic changes in UTC offsets.
-- Issue #10092: Properly reset locale in calendar.Locale*Calendar classes.
+- Issue #15199: Fix JavaScript's default MIME type to application/javascript.
+ Patch by Bohuslav Kabrda.
-- logging: Added _logRecordClass, getLogRecordClass, setLogRecordClass to
- increase flexibility of LogRecord creation.
+- Issue #12643: `code.InteractiveConsole` now respects `sys.excepthook` when
+ displaying exceptions. Patch by Aaron Iles.
-- Issue #5117: Case normalization was needed on ntpath.relpath(). Also fixed
- root directory issue on posixpath.relpath(). (Ported working fixes from
- ntpath.)
+- Issue #13579: `string.Formatter` now understands the 'a' conversion specifier.
-- Issue #1343: xml.sax.saxutils.XMLGenerator now has an option
- short_empty_elements to direct it to use self-closing tags when appropriate.
+- Issue #15595: Fix ``subprocess.Popen(universal_newlines=True)`` for certain
+ locales (utf-16 and utf-32 family). Patch by Chris Jerdonek.
-- Issue #9807 (part 1): Expose the ABI flags in sys.abiflags. Add --abiflags
- switch to python-config for command line access.
+- Issue #15477: In cmath and math modules, add workaround for platforms whose
+ system-supplied log1p function doesn't respect signs of zeros.
-- Issue #6098: Don't claim DOM level 3 conformance in minidom.
+- Issue #15715: `importlib.__import__()` will silence an ImportError when the
+ use of fromlist leads to a failed import.
-- Issue #5762: Fix AttributeError raised by ``xml.dom.minidom`` when an empty
- XML namespace attribute is encountered.
+- Issue #14669: Fix pickling of connections and sockets on Mac OS X by
+ sending/receiving an acknowledgment after file descriptor transfer.
+ TestPicklingConnection has been reenabled for Mac OS X.
-- Issue #2830: Add the ``html.escape()`` function, which quotes all problematic
- characters by default. Deprecate ``cgi.escape()``.
+- Issue #11062: Fix adding a message from file to Babyl mailbox.
-- Issue #9409: Fix the regex to match all kind of filenames, for interactive
- debugging in doctests.
+- Issue #15646: Prevent equivalent of a fork bomb when using `multiprocessing`
+ on Windows without the ``if __name__ == '__main__'`` idiom.
-- Issue #9183: ``datetime.timezone(datetime.timedelta(0))`` will now return the
- same instance as ``datetime.timezone.utc``.
+- Issue #15678: Fix IDLE menus when started from OS X command line (3.3.0b2
+ regression).
-- Issue #7523: Add SOCK_CLOEXEC and SOCK_NONBLOCK to the socket module, where
- supported by the system. Patch by Nikita Vetoshkin.
+C API
+-----
-- Issue #10063: file:// scheme will stop accessing remote hosts via ftp
- protocol. file:// urls had fallback to access remote hosts via ftp. This was
- not correct, change is made to raise a URLError when a remote host is tried to
- access via file:// scheme.
+Extension Modules
+-----------------
-- Issue #1710703: Write structures for an empty ZIP archive when a ZipFile is
- created in modes 'a' or 'w' and then closed without adding any files. Raise
- BadZipfile (rather than IOError) when opening small non-ZIP files.
+Tools/Demos
+-----------
-- Issue #10041: The signature of optional arguments in socket.makefile() didn't
- match that of io.open(), and they also didn't get forwarded properly to
- TextIOWrapper in text mode. Patch by Kai Zhu.
+Documentation
+-------------
-- Issue #9003: http.client.HTTPSConnection, urllib.request.HTTPSHandler and
- urllib.request.urlopen now take optional arguments to allow for server
- certificate checking, as recommended in public uses of HTTPS.
+- Issue #14674: Add a discussion of the `json` module's standard compliance.
+ Patch by Chris Rebert.
-- Issue #6612: Fix site and sysconfig to catch os.getcwd() error, eg. if the
- current directory was deleted. Patch written by W. Trevor King.
+- Create a 'Concurrent Execution' section in the docs, and split up the
+ 'Optional Operating System Services' section to use a more user-centric
+ classification scheme (splitting them across the new CE section, IPC and text
+ processing). Operating system limitatons can be reflected with the Sphinx
+ ``:platform:`` tag, it doesn't make sense as part of the Table of Contents.
-- Issue #3873: Speed up unpickling from file objects that have a peek() method.
+- Issue #4966: Bring the sequence docs up to date for the Py3k transition and
+ the many language enhancements since they were original written.
-- Issue #10075: Add a session_stats() method to SSLContext objects.
+- The "path importer" misnomer has been replaced with Eric Snow's
+ more-awkward-but-at-least-not-wrong suggestion of "path based finder" in the
+ import system reference docs.
-- Issue #9948: Fixed problem of losing filename case information.
+- Issue #15640: Document `importlib.abc.Finder` as deprecated.
-Extension Modules
------------------
+- Issue #15630: Add an example for "continue" stmt in the tutorial. Patch by
+ Daniel Ellis.
-- Issue #5109: array.array constructor will now use fast code when
- initial data is provided in an array object with correct type.
+Tests
+-----
-- Issue #6317: Now winsound.PlaySound only accepts unicode.
+- Issue #15747: ZFS always returns EOPNOTSUPP when attempting to set the
+ UF_IMMUTABLE flag (via either chflags or lchflags); refactor affected tests in
+ test_posix.py to account for this.
-- Issue #6317: Now winsound.PlaySound can accept non ascii filename.
+- Issue #15285: Refactor the approach for testing connect timeouts using two
+ external hosts that have been configured specifically for this type of test.
-- Issue #9377: Use Unicode API for gethostname on Windows.
+- Issue #15743: Remove the deprecated method usage in `urllib` tests. Patch by
+ Jeff Knupp.
-- Issue #10143: Update "os.pathconf" values.
+- Issue #15615: Add some tests for the `json` module's handling of invalid input
+ data. Patch by Kushal Das.
-- Issue #6518: Support context manager protcol for ossaudiodev types.
+Build
+-----
-- Issue #678250: Make mmap flush a noop on ACCESS_READ and ACCESS_COPY.
+- Output lib files for PGO build into PGO directory.
-- Issue #9054: Fix a crash occurring when using the pyexpat module with expat
- version 2.0.1.
+- Pick up 32-bit launcher from PGO directory on 64-bit PGO build.
-- Issue #5355: Provide mappings from Expat error numbers to string descriptions
- and backwards, in order to actually make it possible to analyze error codes
- provided by ExpatError.
+- Drop ``PC\python_nt.h`` as it's not used. Add input dependency on custom
+ build step.
-- The Unicode database was updated to 6.0.0.
+- Issue #15511: Drop explicit dependency on pythonxy.lib from _decimal amd64
+ configuration.
-C-API
------
+- Add missing PGI/PGO configurations for pywlauncher.
-- Issue #10288: The deprecated family of "char"-handling macros
- (ISLOWER()/ISUPPER()/etc) have now been removed: use Py_ISLOWER() etc instead.
+- Issue #15645: Ensure 2to3 grammar pickles are properly installed.
-- Issue #9778: Hash values are now always the size of pointers. A new Py_hash_t
- type has been introduced.
-Tools/Demos
------------
+What's New in Python 3.3.0 Beta 2?
+==================================
-- Issue #10117: Tools/scripts/reindent.py now accepts source files that use
- encoding other than ASCII or UTF-8. Source encoding is preserved when
- reindented code is written to a file.
+*Release date: 12-Aug-2012*
-- Issue #7287: Demo/imputil/knee.py was removed.
+Core and Builtins
+-----------------
-Tests
------
+- Issue #15568: Fix the return value of ``yield from`` when StopIteration is
+ raised by a custom iterator.
-- Issue #3699: Fix test_bigaddrspace and extend it to test bytestrings as well
- as unicode strings. Initial patch by Sandro Tosi.
+- Issue #13119: `sys.stdout` and `sys.stderr` are now using "\r\n" newline on
+ Windows, as Python 2.
-- Issue #10294: Remove dead code form test_unicode_file.
+- Issue #15534: Fix the fast-search function for non-ASCII Unicode strings.
-- Issue #10123: Don't use non-ascii filenames in test_doctest tests. Add a new
- test specific to unicode (non-ascii name and filename).
+- Issue #15508: Fix the docstring for `__import__()` to have the proper default
+ value of 0 for 'level' and to not mention negative levels since they are not
+ supported.
-Build
------
+- Issue #15425: Eliminated traceback noise from more situations involving
+ importlib.
-- Issue #10268: Add a --enable-loadable-sqlite-extensions option to configure.
+- Issue #14578: Support modules registered in the Windows registry again.
-- Issue #8852: Allow the socket module to build on OpenSolaris.
+- Issue #15466: Stop using TYPE_INT64 in marshal, to make importlib.h (and other
+ byte code files) equal between 32-bit and 64-bit systems.
-- Drop -OPT:Olimit compiler option.
+- Issue #1692335: Move initial exception args assignment to
+ `BaseException.__new__()` to help pickling of naive subclasses.
-- Issue #10094: Use versioned .so files on GNU/kfreeBSD and the GNU Hurd.
+- Issue #12834: Fix `PyBuffer_ToContiguous()` for non-contiguous arrays.
-- Accept Oracle Berkeley DB 5.0 and 5.1 as backend for the dbm extension.
+- Issue #15456: Fix code `__sizeof__()` after #12399 change. Patch by Serhiy
+ Storchaka.
-- Issue #7473: avoid link errors when building a framework with a different set
- of architectures than the one that is currently installed.
+- Issue #15404: Refleak in PyMethodObject repr.
+- Issue #15394: An issue in `PyModule_Create()` that caused references to be
+ leaked on some error paths has been fixed. Patch by Julia Lawall.
-What's New in Python 3.2 Alpha 3?
-=================================
+- Issue #15368: An issue that caused bytecode generation to be non-deterministic
+ has been fixed.
-*Release date: 09-Oct-2010*
+- Issue #15202: Consistently use the name "follow_symlinks" for new parameters
+ in os and shutil functions.
-Core and Builtins
------------------
+- Issue #15314: ``__main__.__loader__`` is now set correctly during interpreter
+ startup.
-- Issue #10068: Global objects which have reference cycles with their module's
- dict are now cleared again. This causes issue #7140 to appear again.
+- Issue #15111: When a module imported using 'from import' has an ImportError
+ inside itself, don't mask that fact behind a generic ImportError for the
+ module itself.
-- Issue #9738: Document PyErr_SetString() and PyErr_SetFromErrnoWithFilename()
- encodings.
+- Issue #15293: Add GC support to the AST base node type.
-- ast.literal_eval() can now handle negative numbers. It is also a little more
- liberal in what it accepts without compromising the safety of the evaluation.
- For example, 3j+4 and 3+4+5 are both accepted.
+- Issue #15291: Fix a memory leak where AST nodes where not properly
+ deallocated.
-- Issue #10006: type.__abstractmethods__ now raises an AttributeError. As a
- result metaclasses can now be ABCs (see #9533).
+- Issue #15110: Fix the tracebacks generated by "import xxx" to not show the
+ importlib stack frames.
-- Issue #8670: ctypes.c_wchar supports non-BMP characters with 32 bits wchar_t.
+- Issue #15020: The program name used to search for Python's path is now
+ "python3" under Unix, not "python".
-- Issue #8670: PyUnicode_AsWideChar() and PyUnicode_AsWideCharString() replace
- UTF-16 surrogate pairs by single non-BMP characters for 16 bits Py_UNICODE and
- 32 bits wchar_t (eg. Linux in narrow build).
+- Issue #15897: zipimport.c doesn't check return value of fseek().
+ Patch by Felipe Cruz.
-- Issue #10003: Allow handling of SIGBREAK on Windows. Fixes a regression
- introduced by issue #9324.
+- Issue #15033: Fix the exit status bug when modules invoked using -m swith,
+ return the proper failure return value (1). Patch contributed by Jeff Knupp.
-- Issue #9979: Create function PyUnicode_AsWideCharString().
+- Issue #15229: An `OSError` subclass whose __init__ doesn't call back
+ OSError.__init__ could produce incomplete instances, leading to crashes when
+ calling str() on them.
-- Issue #7397: Mention that importlib.import_module() is probably what someone
- really wants to be using in __import__'s docstring.
+- Issue 15307: Virtual environments now use symlinks with framework builds on
+ Mac OS X, like other POSIX builds.
-- Issue #8521: Allow CreateKeyEx, OpenKeyEx, and DeleteKeyEx functions of winreg
- to use named arguments.
+Library
+-------
-- Issue #9930: Remove bogus subtype check that was causing (e.g.)
- float.__rdiv__(2.0, 3) to return NotImplemented instead of the expected 1.5.
+- Issue #15424: Add a `__sizeof__()` implementation for array objects. Patch by
+ Ludwig Hähne.
-- Issue #9808: Implement os.getlogin for Windows. Patch by Jon Anglin.
+- Issue #15576: Allow extension modules to act as a package's __init__ module.
-- Issue #9901: Destroying the GIL in Py_Finalize() can fail if some other
- threads are still running. Instead, reinitialize the GIL on a second call to
- Py_Initialize().
+- Issue #15502: Have `importlib.invalidate_caches()` work on `sys.meta_path`
+ instead of `sys.path_importer_cache`.
-- All SyntaxErrors now have a column offset and therefore a caret when the error
- is printed.
+- Issue #15163: Pydoc shouldn't list __loader__ as module data.
-- Issue #9252: PyImport_Import no longer uses a fromlist hack to return the
- module that was imported, but instead gets the module from sys.modules.
+- Issue #15471: Do not use mutable objects as defaults for
+ `importlib.__import__()`.
-- Issue #9213: The range type_items now provides index() and count() methods, to
- conform to the Sequence ABC. Patch by Daniel Urban and Daniel Stutzbach.
+- Issue #15559: To avoid a problematic failure mode when passed to the bytes
+ constructor, objects in the ipaddress module no longer implement `__index__()`
+ (they still implement `__int__()` as appropriate).
-- Issue #7994: Issue a PendingDeprecationWarning if object.__format__ is called
- with a non-empty format string. This is an effort to future-proof user
- code. If a derived class does not currently implement __format__ but later
- adds its own __format__, it would most likely break user code that had
- supplied a format string. This will be changed to a DeprecationWaring in
- Python 3.3 and it will be an error in Python 3.4.
+- Issue #15546: Fix handling of pathological input data in the peek() and
+ read1() methods of the BZ2File, GzipFile and LZMAFile classes.
-- Issue #9828: Destroy the GIL in Py_Finalize(), so that it gets properly
- re-created on a subsequent call to Py_Initialize(). The problem (a crash)
- wouldn't appear in 3.1 or 2.7 where the GIL's structure is more trivial.
+- Issue #13052: Fix IDLE crashing when replace string in Search/Replace dialog
+ ended with ``\``. Patch by Roger Serwy.
-- Issue #9210: Configure option --with-wctype-functions was removed. Using the
- functions from the libc caused the methods .upper() and lower() to become
- locale aware and created subtly wrong results.
+- Issue #12655: Instead of requiring a custom type, `os.sched_getaffinity()` and
+ `os.sched_setaffinity()` now use regular sets of integers to represent the
+ CPUs a process is restricted to.
-- Issue #9738: PyUnicode_FromFormat() and PyErr_Format() raise an error on a
- non-ASCII byte in the format string.
+- Issue #15538: Fix compilation of the `socket.getnameinfo()` /
+ `socket.getaddrinfo()` emulation code. Patch by Philipp Hagemeister.
-- Issue #4617: Previously it was illegal to delete a name from the local
- namespace if it occurs as a free variable in a nested block. This limitation
- of the compiler has been lifted, and a new opcode introduced (DELETE_DEREF).
+- Issue #15519: Properly expose WindowsRegistryFinder in importlib (and use the
+ correct term for it). Original patch by Eric Snow.
-- Issue #9804: ascii() now always represents unicode surrogate pairs as a single
- ``\UXXXXXXXX``, regardless of whether the character is printable or not.
- Also, the "backslashreplace" error handler now joins surrogate pairs into a
- single character on UCS-2 builds.
+- Issue #15502: Bring the importlib ABCs into line with the current state of the
+ import protocols given PEP 420. Original patch by Eric Snow.
-- Issue #9757: memoryview objects get a release() method to release the
- underlying buffer (previously this was only done when deallocating the
- memoryview), and gain support for the context management protocol.
+- Issue #15499: Launching a webbrowser in Unix used to sleep for a few seconds.
+ Original patch by Anton Barkovsky.
-- Issue #9797: pystate.c wrongly assumed that zero couldn't be a valid
- thread-local storage key.
+- Issue #15463: The faulthandler module truncates strings to 500 characters,
+ instead of 100, to be able to display long file paths.
-Library
--------
+- Issue #6056: Make `multiprocessing` use setblocking(True) on the sockets it
+ uses. Original patch by J Derek Wilson.
-- Issue #2236: distutils' mkpath ignored the mode parameter.
+- Issue #15364: Fix sysconfig.get_config_var('srcdir') to be an absolute path.
-- Fix typo in one sdist option (medata-check).
+- Issue #15041: Update "see also" list in tkinter documentation.
-- Issue #9199: Fix incorrect use of distutils.cmd.Command.announce.
+- Issue #15413: `os.times()` had disappeared under Windows.
-- Issue #1718574: Fix options that were supposed to accept arguments but did
- not in build_clib.
+- Issue #15402: An issue in the struct module that caused `sys.getsizeof()` to
+ return incorrect results for struct.Struct instances has been fixed. Initial
+ patch by Serhiy Storchaka.
-- Issue #9437: Fix building C extensions with non-default LDFLAGS.
+- Issue #15232: When mangle_from is True, `email.Generator` now correctly
+ mangles lines that start with 'From ' that occur in a MIME preamble or
+ epilogue.
-- Issue #4661: email can now parse bytes input and generate either converted
- 7bit output or bytes output. Email version bumped to 5.1.0.
+- Issue #15094: Incorrectly placed #endif in _tkinter.c. Patch by Serhiy
+ Storchaka.
-- Issue #1589: Add ssl.match_hostname(), to help implement server identity
- verification for higher-level protocols.
+- Issue #13922: `argparse` no longer incorrectly strips '--'s that appear after
+ the first one.
-- Issue #9759: GzipFile now raises ValueError when an operation is attempted
- after the file is closed. Patch by Jeffrey Finkelstein.
+- Issue #12353: `argparse` now correctly handles null argument values.
-- Issue #9042: Fix interaction of custom translation classes and caching in
- gettext.
+- Issue #10017, issue #14998: Fix TypeError using pprint on dictionaries with
+ user-defined types as keys or other unorderable keys.
-- Issue #6706: asyncore.dispatcher now provides a handle_accepted() method
- returning a (sock, addr) pair which is called when a connection has been
- established with a new remote endpoint. This is supposed to be used as a
- replacement for old handle_accept() and avoids the user to call accept()
- directly.
+- Issue #15397: `inspect.getmodulename()` is now based directly on importlib via
+ a new `importlib.machinery.all_suffixes()` API.
-- Issue #9065: tarfile no longer uses "root" as the default for the uname and
- gname field.
+- Issue #14635: `telnetlib` will use poll() rather than select() when possible to
+ avoid failing due to the select() file descriptor limit.
-- Issue #8980: Fixed a failure in distutils.command check that was shadowed by
- an environment that does not have docutils. Patch by Arfrever.
+- Issue #15180: Clarify posixpath.join() error message when mixing str & bytes.
-- Issue #1050268: parseaddr now correctly quotes double quote and backslash
- characters that appear inside quoted strings in email addresses.
+- Issue #15343: pkgutil now includes an iter_importer_modules implementation for
+ importlib.machinery.FileFinder (similar to the way it already handled
+ zipimport.zipimporter).
-- Issue #10004: quoprimime no longer generates a traceback when confronted with
- invalid characters after '=' in a Q-encoded word.
+- Issue #15314: runpy now sets __main__.__loader__ correctly.
-- Issue #1491: BaseHTTPServer nows send a ``100 Continue`` response before
- sending a 200 OK for the Expect: 100-continue request header.
+- Issue #15357: The import emulation in pkgutil is now deprecated. pkgutil uses
+ importlib internally rather than the emulation.
-- Issue #9360: Cleanup and improvements to the nntplib module. The API now
- conforms to the philosophy of bytes and unicode separation in Python 3. A
- test suite has also been added.
+- Issue #15233: Python now guarantees that callables registered with the atexit
+ module will be called in a deterministic order.
-- Issue #9962: GzipFile now has the peek() method.
+- Issue #15238: `shutil.copystat()` now copies Linux "extended attributes".
-- Issue #9090: When a socket with a timeout fails with EWOULDBLOCK or EAGAIN,
- retry the select() loop instead of bailing out. This is because select() can
- incorrectly report a socket as ready for reading (for example, if it received
- some data with an invalid checksum).
+- Issue #15230: runpy.run_path now correctly sets __package__ as described in
+ the documentation.
-- Issue #3612: Added new types to ctypes.wintypes. (CHAR and pointers)
+- Issue #15315: Support VS 2010 in distutils cygwincompiler.
-- Issue #9950: Fix socket.sendall() crash or misbehaviour when a signal is
- received. Now sendall() properly calls signal handlers if necessary, and
- retries sending if these returned successfully, including on sockets with a
- timeout.
+- Issue #15294: Fix a regression in pkgutil.extend_path()'s handling of nested
+ namespace packages.
-- Issue #9947: logging: Fixed locking bug in stopListening.
+- Issue #15056: `imp.cache_from_source()` and `imp.source_from_cache()` raise
+ NotImplementedError when `sys.implementation.cache_tag` is set to None.
-- Issue #9945: logging: Fixed locking bugs in addHandler/removeHandler.
+- Issue #15256: Grammatical mistake in exception raised by `imp.find_module()`.
-- Issue #9936: Fixed executable lines' search in the trace module.
+- Issue #5931: `wsgiref` environ variable SERVER_SOFTWARE will specify an
+ implementation specific term like CPython, Jython instead of generic "Python".
-- Issue #9790: Rework imports necessary for samefile and sameopenfile
- in ntpath.
+- Issue #13248: Remove obsolete argument "max_buffer_size" of BufferedWriter and
+ BufferedRWPair, from the io module.
-- Issue #9928: Properly initialize the types exported by the bz2 module.
+- Issue #13248: Remove obsolete argument "version" of `argparse.ArgumentParser`.
-- Issue #1675951: Allow GzipFile to work with unseekable file objects. Patch by
- Florian Festi.
+- Issue #14814: Implement more consistent ordering and sorting behaviour for
+ ipaddress objects.
-- Logging: Added QueueListener class to facilitate logging usage for
- performance-critical threads.
+- Issue #14814: `ipaddress` network objects correctly return NotImplemented when
+ compared to arbitrary objects instead of raising TypeError.
-- Issue #9916: Add some missing errno symbols.
+- Issue #14990: Correctly fail with SyntaxError on invalid encoding declaration.
-- Issue #9877: Expose sysconfig.get_makefile_filename()
+- Issue #14814: `ipaddress` now provides more informative error messages when
+ constructing instances directly (changes permitted during beta due to
+ provisional API status).
-- logging: Added hasHandlers() method to Logger and LoggerAdapter.
+- Issue #15247: `io.FileIO` now raises an error when given a file descriptor
+ pointing to a directory.
-- Issue #9908: Fix os.stat() on bytes paths under Windows 7.
+- Issue #15261: Stop os.stat(fd) crashing on Windows when fd not open.
-- Issue #2643: msync() is not called anymore when deallocating an open mmap
- object, only munmap().
+- Issue #15166: Implement `imp.get_tag()` using `sys.implementation.cache_tag`.
-- logging: Changed LoggerAdapter implementation internally, to make it easier to
- subclass in a useful way.
+- Issue #15210: Catch KeyError when `importlib.__init__()` can't find
+ _frozen_importlib in sys.modules, not ImportError.
-- logging: hasHandlers method was added to Logger, and isEnabledFor,
- getEffectiveLevel, hasHandlers and setLevel were added to LoggerAdapter.
- LoggerAdapter was introduced into the unit tests for logging.
+- Issue #15030: `importlib.abc.PyPycLoader` now supports the new source size
+ header field in .pyc files.
-- Issue #1686: Fix string.Template when overriding the pattern attribute.
+- Issue #5346: Preserve permissions of mbox, MMDF and Babyl mailbox files on
+ flush().
-- Issue #9854: SocketIO objects now observe the RawIOBase interface in
- non-blocking mode: they return None when an operation would block (instead of
- raising an exception).
+- Issue #10571: Fix the "--sign" option of distutils' upload command. Patch by
+ Jakub Wilk.
-- Issue #1730136: Fix the comparison between a tk.font.Font and an object of
- another kind.
+- Issue #9559: If messages were only added, a new file is no longer created and
+ renamed over the old file when flush() is called on an mbox, MMDF or Babyl
+ mailbox.
-- Issue #9441: logging has better coverage for rotating file handlers.
+- Issue 10924: Fixed `crypt.mksalt()` to use a RNG that is suitable for
+ cryptographic purpose.
-- Issue #9865: collections.OrderedDict now has a __sizeof__ method.
+- Issue #15184: Ensure consistent results of OS X configuration tailoring for
+ universal builds by factoring out common OS X-specific customizations from
+ sysconfig, distutils.sysconfig, distutils.util, and distutils.unixccompiler
+ into a new module _osx_support.
-- Issue #9854: The default read() implementation in io.RawIOBase now handles
- non-blocking readinto() returning None correctly.
+C API
+-----
-- Issue #1552: socket.socketpair() now returns regular socket.socket objects
- supporting the whole socket API (rather than the "raw" _socket.socket
- objects).
+- Issue #15610: `PyImport_ImportModuleEx()` now uses a 'level' of 0 instead of -1.
-- Issue #9853: Fix the signature of SSLSocket.recvfrom() and SSLSocket.sendto()
- to match the corresponding socket methods.
+- Issue #15169, issue #14599: Strip out the C implementation of
+ `imp.source_from_cache()` used by PyImport_ExecCodeModuleWithPathnames() and
+ used the Python code instead. Leads to PyImport_ExecCodeModuleObject() to not
+ try to infer the source path from the bytecode path as
+ PyImport_ExecCodeModuleWithPathnames() does.
-- Issue #9840: Added a decorator to reprlib for wrapping __repr__ methods to make
- them handle recursive calls within the same thread.
+Extension Modules
+-----------------
-- logging: Enhanced HTTPHandler with secure and credentials initializers.
+- Issue #6493: An issue in ctypes on Windows that caused structure bitfields of
+ type `ctypes.c_uint32` and width 32 to incorrectly be set has been fixed.
-- Issue #767645: Set os.path.supports_unicode_filenames to True on Mac OS X.
+- Issue #15194: Update libffi to the 3.0.11 release.
-- Issue #9837: The read() method of ZipExtFile objects (as returned by
- ZipFile.open()) could return more bytes than requested.
+Tools/Demos
+-----------
-- Issue #9826: OrderedDict.__repr__ can now handle self-referential values:
- d['x'] = d.
+- Issue #15458: python-config gets a new option --configdir to print the $LIBPL
+ value.
-- Issue #9825: Using __del__ in the definition of collections.OrderedDict made
- it possible for the user to create self-referencing ordered dictionaries which
- become permanently uncollectable GC garbage. Reinstated the Python 3.1
- approach of using weakref proxies so that reference cycles never get created
- in the first place.
+- Move importlib.test.benchmark to Tools/importbench.
-- Issue #9579, #9580: Fix os.confstr() for value longer than 255 bytes and
- encode the value with filesystem encoding and surrogateescape (instead of
- utf-8 in strict mode) . Patch written by David Watson.
+- Issue #12605: The gdb hooks for debugging CPython (within Tools/gdb) have been
+ enhanced to show information on more C frames relevant to CPython within the
+ "py-bt" and "py-bt-full" commands:
-- Issue #9632: Remove sys.setfilesystemencoding() function: use PYTHONFSENCODING
- environment variable to set the filesystem encoding at Python startup.
- sys.setfilesystemencoding() creates inconsistencies because it is unable to
- reencode all filenames in all objects.
+ * C frames that are waiting on the GIL
+ * C frames that are garbage-collecting
+ * C frames that are due to the invocation of a PyCFunction
-- Issue #9410: Various optimizations to the pickle module, leading to speedups
- up to 4x (depending on the benchmark). Mostly ported from Unladen Swallow;
- initial patch by Alexandre Vassalotti.
+Documentation
+-------------
-- The pprint module now supports printing OrderedDicts in their given order
- (formerly, it would sort the keys).
+- Issue #15444: Use proper spelling for non-ASCII contributor names. Patch by
+ Serhiy Storchaka.
-- Logging: Added QueueHandler class to facilitate logging usage with
- multiprocessing.
+- Issue #15295: Reorganize and rewrite the documentation on the import system.
-- Issue #9707: Rewritten reference implementation of threading.local which is
- friendlier towards reference cycles. This change is not normally visible
- since an optimized C implementation (_thread._local) is used instead.
+- Issue #15230: Clearly document some of the limitations of the runpy module and
+ nudge readers towards importlib when appropriate.
-- Issue #6394: os.getppid() is now supported on Windows. Note that it will
- still return the id of the parent process after it has exited. This process
- id may even have been reused by another unrelated process.
+- Issue #15053: Copy Python 3.3 import lock change notice to all relevant
+ functions in imp instead of just at the top of the relevant section.
-- Issue #9792: In case of connection failure, socket.create_connection() would
- swallow the exception and raise a new one, making it impossible to fetch the
- original errno, or to filter timeout errors. Now the original error is
- re-raised.
+- Issue #15288: Link to the term "loader" in notes in pkgutil about how things
+ won't work as expected in Python 3.3 and mark the requisite functions as
+ "changed" since they will no longer work with modules directly imported by
+ import itself.
-- Issue #9758: When fcntl.ioctl() was called with mutable_flag set to True, and
- the passed buffer was exactly 1024 bytes long, the buffer wouldn't be updated
- back after the system call. Original patch by Brian Brazil.
+- Issue #13557: Clarify effect of giving two different namespaces to `exec()` or
+ `execfile()`.
-- Updates to the random module:
+- Issue #15250: Document that `filecmp.dircmp()` compares files shallowly. Patch
+ contributed by Chris Jerdonek.
- * Document which parts of the module are guaranteed to stay the same across
- versions and which parts are subject to change.
+Tests
+-----
- * Update the seed() method to use all of the bits in a string instead of just
- the hash value. This makes better use of the seed value and assures the
- seeding is platform independent. Issue #7889.
+- Issue #15467: Move helpers for `__sizeof__()` tests into test_support. Patch
+ by Serhiy Storchaka.
- * Improved the random()-->integer algorithm used in choice(), shuffle(),
- sample(), randrange(), and randint(). Formerly, it used int(n*random())
- which has a slight bias whenever n is not a power of two. Issue #9025.
+- Issue #15320: Make iterating the list of tests thread-safe when running tests
+ in multiprocess mode. Patch by Chris Jerdonek.
- * Improved documentation of arguments to randrange(). Issue #9379.
+- Issue #15168: Move `importlib.test` to `test.test_importlib`.
-- collections.OrderedDict now supports a new method for repositioning keys to
- either end.
+- Issue #15091: Reactivate a test on UNIX which was failing thanks to a
+ forgotten `importlib.invalidate_caches()` call.
-- Issue #9754: Similarly to assertRaises and assertRaisesRegexp, unittest test
- cases now also have assertWarns and assertWarnsRegexp methods to check that a
- given warning type was triggered by the code under test.
+- Issue #15230: Adopted a more systematic approach in the runpy tests.
-- Issue #5506: BytesIO objects now have a getbuffer() method exporting a view of
- their contents without duplicating them. The view is both readable and
- writable.
+- Issue #15300: Ensure the temporary test working directories are in the same
+ parent folder when running tests in multiprocess mode from a Python build.
+ Patch by Chris Jerdonek.
-- Issue #7566: Implement os.path.sameopenfile for Windows.
+- Issue #15284: Skip {send,recv}msg tests in test_socket when IPv6 is not
+ enabled. Patch by Brian Brazil.
-- Issue #9293: I/O streams now raise ``io.UnsupportedOperation`` when an
- unsupported operation is attempted (for example, writing to a file open only
- for reading).
+- Issue #15277: Fix a resource leak in support.py when IPv6 is disabled. Patch
+ by Brian Brazil.
-- hashlib has two new constant attributes: algorithms_guaranteed and
- algorithms_avaiable that respectively list the names of hash algorithms
- guaranteed to exist in all Python implementations and the names of hash
- algorithms available in the current process.
+Build
+-----
-- A new package ``concurrent.futures`` as defined by PEP 3148.
+- Issue #11715: Fix multiarch detection without having Debian development tools
+ (dpkg-dev) installed.
-C-API
------
+- Issue #15037: Build OS X installers with local copy of ncurses 5.9 libraries
+ to avoid curses.unget_wch bug present in older versions of ncurses such as
+ those shipped with OS X.
-- Add PyErr_SyntaxLocationEx, which supports passing a column offset.
+- Issue #15560: Fix building _sqlite3 extension on OS X with an SDK. Also, for
+ OS X installers, ensure consistent sqlite3 behavior and feature availability
+ by building a local copy of libsqlite3 rather than depending on the wide range
+ of versions supplied with various OS X releases.
-- Issue #9834: Don't segfault in PySequence_GetSlice, PySequence_SetSlice, or
- PySequence_DelSlice when the object doesn't have any mapping operations
- defined.
+- Issue #8847: Disable COMDAT folding in Windows PGO builds.
-Tools/Demos
------------
+- Issue #14018: Fix OS X Tcl/Tk framework checking when using OS X SDKs.
-- Issue #9188: The gdb extension now handles correctly narrow (UCS2) as well as
- wide (UCS4) unicode builds for both the host interpreter (embedded inside gdb)
- and the interpreter under test.
+- Issue #15431: Add _freeze_importlib project to regenerate importlib.h on
+ Windows. Patch by Kristján Valur Jónsson.
-Tests
------
+- Issue #14197: For OS X framework builds, ensure links to the shared library
+ are created with the proper ABI suffix.
-- Issue #9308: Added tests for importing encoded modules that do not
- depend on specific stdlib modules being encoded in a certain way.
+- Issue #14330: For cross builds, don't use host python, use host search paths
+ for host compiler.
-- Issue #1051: Add a script (Lib/test/make_ssl_certs.py) to generate the custom
- certificate and private key files used by SSL-related certs.
+- Issue #15235: Allow Berkley DB versions up to 5.3 to build the dbm module.
-- Issue #9978: Wait until subprocess completes initialization. (Win32KillTests
- in test_os)
+- Issue #15268: Search curses.h in /usr/include/ncursesw.
-- Issue #7110: regrtest now sends test failure reports and single-failure
- tracebacks to stderr rather than stdout.
-- Issue #9628: fix runtests.sh -x option so more than one test can be excluded.
+What's New in Python 3.3.0 Beta 1?
+==================================
-- Issue #9899: Fix test_tkinter.test_font on various platforms. Patch by Ned
- Deily.
+*Release date: 27-Jun-2012*
-- Issue #9894: Do not hardcode ENOENT in test_subprocess.
+Core and Builtins
+-----------------
-- Issue #9315: Added tests for the trace module. Patch by Eli Bendersky.
+- Fix a (most likely) very rare memory leak when calling main() and not being
+ able to decode a command-line argument.
-- Issue #9323: Make test.regrtest.__file__ absolute, this was not always the
- case when running profile or trace, for example.
+- Issue #14815: Use Py_ssize_t instead of long for the object hash, to
+ preserve all 64 bits of hash on Win64.
-- Issue #9568: Fix test_urllib2_localnet on OS X 10.3.
+- Issue #12268: File readline, readlines and read() or readall() methods
+ no longer lose data when an underlying read system call is interrupted.
+ IOError is no longer raised due to a read system call returning EINTR
+ from within these methods.
-Build
------
+- Issue #11626: Add _SizeT functions to stable ABI.
-- Issue #10062: Allow building on platforms which do not have sem_timedwait.
+- Issue #15146: Add PyType_FromSpecWithBases. Patch by Robin Schreiber.
-- Issue #10054: Some platforms provide uintptr_t in inttypes.h. Patch by Akira
- Kitada.
+- Issue #15142: Fix reference leak when deallocating instances of types
+ created using PyType_FromSpec().
-- Issue #10055: Make json C89-compliant in UCS4 mode.
+- Issue #15042: Add PyState_AddModule and PyState_RemoveModule. Add version
+ guard for Py_LIMITED_API additions. Patch by Robin Schreiber.
-- Issue #9552: Avoid unnecessary rebuild of OpenSSL. (Windows)
+- Issue #10053: Don't close FDs when FileIO.__init__ fails. Loosely based on
+ the work by Hirokazu Yamamoto.
-- Issue #1633863: Don't ignore $CC under AIX.
+- Issue #15096: Removed support for ur'' as the raw notation isn't
+ compatible with Python 2.x's raw unicode strings.
-- Issue #9810: Compile bzip2 source files in Python's project file directly. It
- used to be built with bzip2's makefile.
+- Issue #13783: Generator objects now use the identifier APIs internally
-- Issue #9848: Stopping trying to build _weakref in setup.py as it is a built-in
- module.
+- Issue #14874: Restore charmap decoding speed to pre-PEP 393 levels.
+ Patch by Serhiy Storchaka.
-- Issue #9806: python-config now has an ``--extension-suffix`` option that
- outputs the suffix for dynamic libraries including the ABI version name
- defined by PEP 3149.
+- Issue #15026: utf-16 encoding is now significantly faster (up to 10x).
+ Patch by Serhiy Storchaka.
-- Issue #941346: Improve the build process under AIX and allow Python to be
- built as a shared library. Patch by Sébastien Sablé.
+- Issue #11022: open() and io.TextIOWrapper are now calling
+ locale.getpreferredencoding(False) instead of locale.getpreferredencoding()
+ in text mode if the encoding is not specified. Don't change temporary the
+ locale encoding using locale.setlocale(), use the current locale encoding
+ instead of the user preferred encoding.
-- Issue #4026: Make the fcntl extension build under AIX. Patch by Sébastien
- Sablé.
+- Issue #14673: Add Eric Snow's sys.implementation implementation.
-- Issue #9701: The MacOSX installer can patch the shell profile to ensure that
- the "bin" directory inside the framework is on the shell's search path. This
- feature now also supports the ZSH shell.
+- Issue #15038: Optimize python Locks on Windows.
+Library
+-------
-What's New in Python 3.2 Alpha 2?
-=================================
+- Issue #9803: Don't close IDLE on saving if breakpoint is open.
+ Patch by Roger Serwy.
-*Release date: 05-Sep-2010*
+- Issue #12288: Consider '0' and '0.0' as valid initialvalue
+ for tkinter SimpleDialog.
-Core and Builtins
------------------
+- Issue #15512: Add a __sizeof__ implementation for parser.
+ Patch by Serhiy Storchaka.
-- Issue #9225: Remove the ROT_FOUR and DUP_TOPX opcode, the latter replaced by
- the new (and simpler) DUP_TOP_TWO. Performance isn't changed, but our
- bytecode is a bit simplified. Patch by Demur Rumed.
+- Issue #15469: Add a __sizeof__ implementation for deque objects.
+ Patch by Serhiy Storchaka.
-- Issue #9766: Rename poorly named variables exposed by _warnings to prevent
- confusion with the proper variables names from 'warnings' itself.
+- Issue #15489: Add a __sizeof__ implementation for BytesIO objects.
+ Patch by Serhiy Storchaka.
-- Issue #9212: dict_keys and dict_items now provide the isdisjoint() method, to
- conform to the Set ABC. Patch by Daniel Urban.
+- Issue #15487: Add a __sizeof__ implementation for buffered I/O objects.
+ Patch by Serhiy Storchaka.
-- Issue #9737: Fix a crash when trying to delete a slice or an item from a
- memoryview object.
+- Issue #15514: Correct __sizeof__ support for cpu_set.
+ Patch by Serhiy Storchaka.
-- Issue #9549: sys.setdefaultencoding() and PyUnicode_SetDefaultEncoding() are
- now removed, since their effect was inexistent in 3.x (the default encoding is
- hardcoded to utf-8 and cannot be changed).
+- Issue #15187: Bugfix: remove temporary directories test_shutil was leaving
+ behind.
-- Issue #7415: PyUnicode_FromEncodedObject() now uses the new buffer API
- properly. Patch by Stefan Behnel.
+- Issue #15177: Added dir_fd parameter to os.fwalk().
-- Issue #5553: The Py_LOCAL_INLINE macro now results in inlining on most
- platforms. Previously, it inlined only when using Microsoft Visual C.
+- Issue #15176: Clarified behavior, documentation, and implementation
+ of os.listdir().
-- Issue #9712: Fix tokenize on identifiers that start with non-ascii names.
+- Issue #15061: Re-implemented hmac.compare_digest() in C to prevent further
+ timing analysis and to support all buffer protocol aware objects as well as
+ ASCII only str instances safely.
-- Issue #9688: __basicsize__ and __itemsize__ must be accessed as Py_ssize_t.
+- Issue #15164: Change return value of platform.uname() from a
+ plain tuple to a collections.namedtuple.
-- Issue #9684: Added a definition for SIZEOF_WCHAR_T to PC/pyconfig.h, to match
- the pyconfig.h generated by configure on other systems.
+- Support Mageia Linux in the platform module.
-- Issue #9666: Only catch AttributeError in hasattr(). All other exceptions that
- occur during attribute lookup are now propagated to the caller.
+- Issue #11678: Support Arch linux in the platform module.
-- Issue #8622: Add PYTHONFSENCODING environment variable to override the
- filesystem encoding.
+- Issue #15118: Change return value of os.uname() and os.times() from
+ plain tuples to immutable iterable objects with named attributes
+ (structseq objects).
-- Issue #5127: The C functions that access the Unicode Database now accept and
- return characters from the full Unicode range, even on narrow unicode builds
- (Py_UNICODE_TOLOWER, Py_UNICODE_ISDECIMAL, and others). A visible difference
- in Python is that unicodedata.numeric() now returns the correct value for
- large code points, and repr() may consider more characters as printable.
+- Speed up _decimal by another 10-15% by caching the thread local context
+ that was last accessed. In the pi benchmark (64-bit platform, prec=9),
+ _decimal is now only 1.5x slower than float.
-- Issue #9425: Create PyModule_GetFilenameObject() function to get the filename
- as a unicode object, instead of a byte string. Function needed to support
- unencodable filenames. Deprecate PyModule_GetFilename() in favor on the new
- function.
+- Remove the packaging module, which is not ready for prime time.
-- Issue #8063: Call _PyGILState_Init() earlier in Py_InitializeEx().
+- Issue #15154: Add "dir_fd" parameter to os.rmdir, remove "rmdir"
+ parameter from os.remove / os.unlink.
-- Issue #9612: The set object is now 64-bit clean under Windows.
+- Issue #4489: Add a shutil.rmtree that isn't susceptible to symlink attacks.
+ It is used automatically on platforms supporting the necessary os.openat()
+ and os.unlinkat() functions. Main code by Martin von Löwis.
-- Issue #8202: sys.argv[0] is now set to '-m' instead of '-c' when searching for
- the module file to be executed with the -m command line option.
+- Issue #15156: HTMLParser now uses the new "html.entities.html5" dictionary.
-- Issue #9599: Create PySys_FormatStdout() and PySys_FormatStderr() functions to
- write a message formatted by PyUnicode_FromFormatV() to sys.stdout and
- sys.stderr.
+- Issue #11113: add a new "html5" dictionary containing the named character
+ references defined by the HTML5 standard and the equivalent Unicode
+ character(s) to the html.entities module.
-- Issue #9542: Create PyUnicode_FSDecoder() function, a ParseTuple converter:
- decode bytes objects to unicode using PyUnicode_DecodeFSDefaultAndSize(); str
- objects are output as-is.
+- Issue #15114: the strict mode of HTMLParser and the HTMLParseError exception
+ are deprecated now that the parser is able to parse invalid markup.
-- Issue #9203: Computed gotos are now enabled by default on supported compilers
- (which are detected by the configure script). They can still be disable
- selectively by specifying --without-computed-gotos.
+- Issue #3665: \u and \U escapes are now supported in unicode regular
+ expressions. Patch by Serhiy Storchaka.
-- Issue #9425: Create PyErr_WarnFormat() function, similar to PyErr_WarnEx() but
- use PyUnicode_FromFormatV() to format the warning message.
+- Issue #15153: Added inspect.getgeneratorlocals to simplify white box
+ testing of generator state updates
-- Issue #8530: Prevent stringlib fastsearch from reading beyond the front of an
- array.
+- Issue #13062: Added inspect.getclosurevars to simplify testing stateful
+ closures
-- Issue #5319: Print an error if flushing stdout fails at interpreter shutdown.
+- Issue #11024: Fixes and additional tests for Time2Internaldate.
-- Issue #9337: The str() of a float or complex number is now identical to its
- repr().
+- Issue #14626: Large refactoring of functions / parameters in the os module.
+ Many functions now support "dir_fd" and "follow_symlinks" parameters;
+ some also support accepting an open file descriptor in place of of a path
+ string. Added os.support_* collections as LBYL helpers. Removed many
+ functions only previously seen in 3.3 alpha releases (often starting with
+ "f" or "l", or ending with "at"). Originally suggested by Serhiy Storchaka;
+ implemented by Larry Hastings.
-- Issue #9416: Fix some issues with complex formatting where the output with no
- type specifier failed to match the str output:
+- Issue #15008: Implement PEP 362 "Signature Objects".
+ Patch by Yury Selivanov.
- - format(complex(-0.0, 2.0), '-') omitted the real part from the output,
- - format(complex(0.0, 2.0), '-') included a sign and parentheses.
+- Issue: #15138: base64.urlsafe_{en,de}code() are now 3-4x faster.
-Extension Modules
------------------
+- Issue #444582: Add shutil.which, for finding programs on the system path.
+ Original patch by Erik Demaine, with later iterations by Jan Killian
+ and Brian Curtin.
-- Issue #8013: time.asctime and time.ctime no longer call system
- asctime and ctime functions. The year range for time.asctime is now
- 1900 through maxint. The range for time.ctime is the same as for
- time.localtime. The string produced by these functions is longer
- than 24 characters when year is greater than 9999.
+- Issue #14837: SSL errors now have ``library`` and ``reason`` attributes
+ describing precisely what happened and in which OpenSSL submodule. The
+ str() of a SSLError is also enhanced accordingly.
-- Issue #6608: time.asctime is now checking struct tm fields its input
- before passing it to the system asctime. Patch by MunSic Jeong.
+- Issue #9527: datetime.astimezone() method will now supply a class
+ timezone instance corresponding to the system local timezone when
+ called with no arguments.
-- Issue #8734: Avoid crash in msvcrt.get_osfhandle() when an invalid file
- descriptor is provided. Patch by Pascal Chambon.
+- Issue #14653: email.utils.mktime_tz() no longer relies on system
+ mktime() when timezone offest is supplied.
-- Issue #7736: Release the GIL around calls to opendir() and closedir() in the
- posix module. Patch by Marcin Bachry.
+- Issue #14684: zlib.compressobj() and zlib.decompressobj() now support the use
+ of predefined compression dictionaries. Original patch by Sam Rushing.
-- Issue #4835: make PyLong_FromSocket_t() and PyLong_AsSocket_t() private to the
- socket module, and fix the width of socket descriptors to be correctly
- detected under 64-bit Windows.
+- Fix GzipFile's handling of filenames given as bytes objects.
-- Issue #1027206: Support IDNA in gethostbyname, gethostbyname_ex, getaddrinfo
- and gethostbyaddr. getnameinfo is now restricted to numeric addresses as
- input.
+- Issue #14772: Return destination values from some shutil functions.
-- Issue #9214: Set operations on a KeysView or ItemsView in collections now
- correctly return a set. Patch by Eli Bendersky.
+- Issue #15064: Implement context manager protocol for multiprocessing types
-- Issue #5737: Add Solaris-specific mnemonics in the errno module. Patch by
- Matthew Ahrens.
+- Issue #15101: Make pool finalizer avoid joining current thread.
-- Restore GIL in nis_cat in case of error. Decode NIS data to fs encoding, using
- the surrogate error handler.
+- Issue #14657: The frozen instance of importlib used for bootstrap is now
+ also the module imported as importlib._bootstrap.
-- Issue #665761: ``functools.reduce()`` will no longer mask exceptions other
- than ``TypeError`` raised by the iterator argument.
+- Issue #14055: Add __sizeof__ support to _elementtree.
-- Issue #9570: Use PEP 383 decoding in os.mknod and os.mkfifo.
+- Issue #15054: A bug in tokenize.tokenize that caused string literals
+ with 'b' prefixes to be incorrectly tokenized has been fixed.
+ Patch by Serhiy Storchaka.
-- Issue #6915: Under Windows, os.listdir() didn't release the Global Interpreter
- Lock around all system calls. Original patch by Ryan Kelly.
+- Issue #15006: Allow equality comparison between naive and aware
+ time or datetime objects.
-- Issue #8524: Add a detach() method to socket objects, so as to put the socket
- into the closed state without closing the underlying file descriptor.
+- Issue #14982: Document that pkgutil's iteration functions require the
+ non-standard iter_modules() method to be defined by an importer (something
+ the importlib importers do not define).
-- Issue #477863: Emit a ResourceWarning at shutdown if gc.garbage is not empty.
+- Issue #15036: Mailbox no longer throws an error if a flush is done
+ between operations when removing or changing multiple items in mbox,
+ MMDF, or Babyl mailboxes.
-- Issue #6869: Fix a refcount problem in the _ctypes extension.
+- Issue #14059: Implement multiprocessing.Barrier.
-- Issue #5504: ctypes should now work with systems where mmap can't be
- PROT_WRITE and PROT_EXEC.
+- Issue #15061: The inappropriately named hmac.secure_compare has been
+ renamed to hmac.compare_digest, restricted to operating on bytes inputs
+ only and had its documentation updated to more accurately reflect both its
+ intent and its limitations
-- Issue #9507: Named tuple repr will now automatically display the right name in
- a tuple subclass.
+- Issue #13841: Make child processes exit using sys.exit() on Windows.
-- Issue #9324: Add parameter validation to signal.signal on Windows in order to
- prevent crashes.
+- Issue #14936: curses_panel was converted to PEP 3121 and PEP 384 API.
+ Patch by Robin Schreiber.
-- Issue #9526: Remove some outdated (int) casts that were preventing the array
- module from working correctly with arrays of more than 2**31 elements.
+- Issue #1667546: On platforms supporting tm_zone and tm_gmtoff fields
+ in struct tm, time.struct_time objects returned by time.gmtime(),
+ time.localtime() and time.strptime() functions now have tm_zone and
+ tm_gmtoff attributes. Original patch by Paul Boddie.
-- Fix memory leak in ssl._ssl._test_decode_cert.
+- Rename adjusted attribute to adjustable in time.get_clock_info() result.
-- Issue #8065: Fix memory leak in readline module (from failure to free the
- result of history_get_history_state()).
+- Issue #3518: Remove references to non-existent BaseManager.from_address()
+ method.
-- Issue #9450: Fix memory leak in readline.replace_history_item and
- readline.remove_history_item for readline version >= 5.0.
+- Issue #13857: Added textwrap.indent() function (initial patch by Ezra
+ Berch)
-- Issue #8105: Validate file descriptor passed to mmap.mmap on Windows.
+- Issue #2736: Added datetime.timestamp() method.
-- Issue #8046: Add context manager protocol support and .closed property to mmap
- objects.
+- Issue #13854: Make multiprocessing properly handle non-integer
+ non-string argument to SystemExit.
-Library
--------
+- Issue #12157: Make pool.map() empty iterables correctly. Initial
+ patch by mouad.
-- Issue #7451: Improve decoding performance of JSON objects, and reduce the
- memory consumption of said decoded objects when they use the same strings as
- keys.
+- Issue #11823: disassembly now shows argument counts on calls with keyword args.
-- Issue #1100562: Fix deep-copying of objects derived from the list and dict
- types. Patch by Michele Orrù and Björn Lindqvist.
+- Issue #14711: os.stat_float_times() has been deprecated.
-- Issue #9753: Fixed socket.dup, which did not always work correctly on Windows.
+- LZMAFile now accepts the modes "rb"/"wb"/"ab" as synonyms of "r"/"w"/"a".
-- Issue #9421: Made the get<type> methods consistently accept the vars and
- default arguments on all parser classes.
+- The bz2 and lzma modules now each contain an open() function, allowing
+ compressed files to readily be opened in text mode as well as binary mode.
-- Issue #7005: Fixed output of None values for RawConfigParser.write and
- ConfigParser.write.
+- BZ2File.__init__() and LZMAFile.__init__() now accept a file object as their
+ first argument, rather than requiring a separate "fileobj" argument.
-- Issue #8990: array.fromstring() and array.tostring() get renamed to
- frombytes() and tobytes(), respectively, to avoid confusion. Furthermore,
- array.frombytes(), array.extend() as well as the array.array() constructor now
- accept bytearray objects. Patch by Thomas Jollans.
+- gzip.open() now accepts file objects as well as filenames.
-- Issue #808164: Fixed socket.close to avoid references to globals, to avoid
- issues when socket.close is called from a __del__ method.
+- Issue #14992: os.makedirs(path, exist_ok=True) would raise an OSError
+ when the path existed and had the S_ISGID mode bit set when it was
+ not explicitly asked for. This is no longer an exception as mkdir
+ cannot control if the OS sets that bit for it or not.
-- Issue #9706: ssl module provides a better error handling in various
- circumstances.
+- Issue #14989: Make the CGI enable option to http.server available via command
+ line.
-- Issue #1868: Eliminate subtle timing issues in thread-local objects by getting
- rid of the cached copy of thread-local attribute dictionary.
+- Issue #14987: Add a missing import statement to inspect.
-- Issue #1512791: In setframerate() in the wave module, non-integral frame rates
- are rounded to the nearest integer.
+- Issue #1079: email.header.decode_header now correctly parses all the examples
+ in RFC2047. There is a necessary visible behavior change: the leading and/or
+ trailing whitespace on ASCII parts is now preserved.
-- Issue #8797: urllib2 does a retry for Basic Authentication failure instead of
- falling into recursion.
+- Issue #14969: Better handling of exception chaining in contextlib.ExitStack
-- Issue #1194222: email.utils.parsedate now returns RFC2822 compliant four
- character years even if the message contains RFC822 two character years.
+- Issue #14962: Update text coloring in IDLE shell window after changing
+ options. Patch by Roger Serwy.
-- Issue #8750: Fixed MutableSet's methods to correctly handle reflexive
- operations on its self, namely x -= x and x ^= x.
+- Issue #14963: Convert contextlib.ExitStack.__exit__ to use an iterative
+ algorithm (Patch by Alon Horev)
-- Issue #9129: smtpd.py is vulnerable to DoS attacks deriving from missing error
- handling when accepting a new connection.
+- Issue #14785: Add sys._debugmallocstats() to help debug low-level memory
+ allocation issues
-- Issue #9601: ftplib now provides a workaround for non-compliant
- implementations such as IIS shipped with Windows server 2003 returning invalid
- response codes for MKD and PWD commands.
+- Issue #14443: Ensure that .py files are byte-compiled with the correct Python
+ executable within bdist_rpm even on older versions of RPM
-- Issue #658749: asyncore's connect() method now correctly interprets winsock
- errors.
+C-API
+-----
-- Issue #9501: Fixed logging regressions in cleanup code.
+- Issue #13783: Inadvertent additions to the public C API in the PEP 380
+ implementation have either been removed or marked as private interfaces.
-- Fix functools.total_ordering() to skip methods inherited from object.
+Extension Modules
+-----------------
-- Issue #9572: Importlib should not raise an exception if a directory it thought
- it needed to create was done concurrently by another process.
+- Issue #15000: Support the "unique" x32 architecture in _posixsubprocess.c.
-- Issue #9617: Signals received during a low-level write operation aren't
- ignored by the buffered IO layer anymore.
+Documentation
+-------------
-- Issue #843590: Make "macintosh" an alias to the "mac_roman" encoding.
+- Issue #15081: Document PyState_FindModule.
+ Patch by Robin Schreiber.
-- Create os.fsdecode(): decode from the filesystem encoding with surrogateescape
- error handler, or strict error handler on Windows.
+- Issue #14814: Added first draft of ipaddress module API reference
-- Issue #3488: Provide convenient shorthand functions ``gzip.compress`` and
- ``gzip.decompress``. Original patch by Anand B. Pillai.
+Tests
+-----
-- Issue #8807: poplib.POP3_SSL class now accepts a context parameter, which is a
- ssl.SSLContext object allowing bundling SSL configuration options,
- certificates and private keys into a single (potentially long-lived)
- structure.
+- Issue #14769: test_capi now has SkipitemTest, which cleverly checks
+ for "parity" between PyArg_ParseTuple() and the Python/getargs.c static
+ function skipitem() for all possible "format units".
-- Issue #8866: parameters passed to socket.getaddrinfo can now be specified as
- single keyword arguments.
+- test_nntplib now tolerates being run from behind NNTP gateways that add
+ "X-Antivirus" headers to articles
-- Address XXX comment in dis.py by having inspect.py prefer to reuse the dis.py
- compiler flag values over defining its own.
+- Issue #15043: test_gdb is now skipped entirely if gdb security settings
+ block loading of the gdb hooks
-- Issue #9147: Added dis.code_info() which is similar to show_code() but returns
- formatted code information in a string rather than displaying on screen.
+- Issue #14963: Add test cases for exception handling behaviour
+ in contextlib.ExitStack (Initial patch by Alon Horev)
-- Issue #9567: functools.update_wrapper now adds a __wrapped__ attribute
- pointing to the original callable.
+Build
+-----
-- Issue #3445: functools.update_wrapper now tolerates missing attributes on
- wrapped callables.
+- Issue #13590: Improve support for OS X Xcode 4:
+ * Try to avoid building Python or extension modules with problematic
+ llvm-gcc compiler.
+ * Since Xcode 4 removes ppc support, extension module builds now
+ check for ppc compiler support and automatically remove ppc and
+ ppc64 archs when not available.
+ * Since Xcode 4 no longer install SDKs in default locations,
+ extension module builds now revert to using installed headers
+ and libs if the SDK used to build the interpreter is not
+ available.
+ * Update ./configure to use better defaults for universal builds;
+ in particular, --enable-universalsdk=yes uses the Xcode default
+ SDK and --with-universal-archs now defaults to "intel" if ppc
+ not available.
-- Issue #5867: Add abc.abstractclassmethod and abc.abstractstaticmethod.
+- Issue #14225: Fix Unicode support for curses (#12567) on OS X
-- Issue #9605: posix.getlogin() decodes the username with file filesystem
- encoding and surrogateescape error handler. Patch written by David Watson.
+- Issue #14928: Fix importlib bootstrap issues by using a custom executable
+ (Modules/_freeze_importlib) to build Python/importlib.h.
-- Issue #9604: posix.initgroups() encodes the username using the fileystem
- encoding and surrogateescape error handler. Patch written by David Watson.
-- Issue #9603: posix.ttyname() and posix.ctermid() decode the terminal name
- using the filesystem encoding and surrogateescape error handler. Patch written
- by David Watson.
+What's New in Python 3.3.0 Alpha 4?
+===================================
-- Issue #7647: The posix module now has the ST_RDONLY and ST_NOSUID constants,
- for use with the statvfs() function. Patch by Adam Jackson.
+*Release date: 31-May-2012*
-- Issue #8688: MANIFEST files created by distutils now include a magic comment
- indicating they are generated. Manually maintained MANIFESTs without this
- marker will not be overwritten or removed.
+Core and Builtins
+-----------------
-- Issue #7467: when reading a file from a ZIP archive, its CRC is checked and a
- BadZipfile error is raised if it doesn't match (as used to be the case in
- Python 2.5 and earlier).
+- Issue #14835: Make plistlib output empty arrays & dicts like OS X.
+ Patch by Sidney San Martín.
-- Issue #9550: a BufferedReader could issue an additional read when the original
- read request had been satisfied, which could block indefinitely when the
- underlying raw IO channel was e.g. a socket. Report and original patch by
- Jason V. Miller.
+- Issue #14744: Use the new _PyUnicodeWriter internal API to speed up
+ str%args and str.format(args).
-- Issue #3757: thread-local objects now support cyclic garbage collection.
- Thread-local objects involved in reference cycles will be deallocated timely
- by the cyclic GC, even if the underlying thread is still running.
+- Issue #14930: Make memoryview objects weakrefable.
-- Issue #9452: Add read_file, read_string, and read_dict to the configparser
- API; new source attribute to exceptions.
+- Issue #14775: Fix a potential quadratic dict build-up due to the garbage
+ collector repeatedly trying to untrack dicts.
-- Issue #6231: Fix xml.etree.ElementInclude to include the tail of the current
- node.
+- Issue #14857: fix regression in references to PEP 3135 implicit __class__
+ closure variable (Reopens issue #12370)
-- Issue #8047: Fix the xml.etree serializer to return bytes by default. Use
- ``encoding="unicode"`` to generate a Unicode string.
+- Issue #14712 (PEP 405): Virtual environments. Implemented by Vinay Sajip.
-- Issue #8280: urllib2's Request method will remove fragments in the url. This
- is how it is supposed to work, wget and curl do the same. Previous behavior
- was wrong.
+- Issue #14660 (PEP 420): Namespace packages. Implemented by Eric Smith.
-- Issue #6683: For SMTP logins we now try all authentication methods advertised
- by the server. Many servers are buggy and advertise authentication methods
- they do not support in reality.
+- Issue #14494: Fix __future__.py and its documentation to note that
+ absolute imports are the default behavior in 3.0 instead of 2.7.
+ Patch by Sven Marnach.
-- Issue #8814: function annotations (the ``__annotations__`` attribute) are now
- included in the set of attributes copied by default by functools.wraps and
- functools.update_wrapper. Patch by Terrence Cole.
+- Issue #9260: A finer-grained import lock. Most of the import sequence
+ now uses per-module locks rather than the global import lock, eliminating
+ well-known issues with threads and imports.
-- Issue #2944: asyncore doesn't handle connection refused correctly.
+- Issue #14624: UTF-16 decoding is now 3x to 4x faster on various inputs.
+ Patch by Serhiy Storchaka.
-- Issue #4184: Private attributes on smtpd.SMTPChannel made public and deprecate
- the private attributes. Add tests for smtpd module.
+- asdl_seq and asdl_int_seq are now Py_ssize_t sized.
-- Issue #3196: email header decoding is now forgiving if an RFC2047 encoded word
- encoded in base64 is lacking padding.
+- Issue #14133 (PEP 415): Implement suppression of __context__ display with an
+ attribute on BaseException. This replaces the original mechanism of PEP 409.
-- Issue #9444: Argparse now uses the first element of prefix_chars as the option
- character for the added 'h/help' option if prefix_chars does not contain a
- '-', instead of raising an error.
+- Issue #14417: Mutating a dict during lookup now restarts the lookup instead
+ of raising a RuntimeError (undoes issue #14205).
-- Issue #7372: Fix pstats regression when stripping paths from profile data
- generated with the profile module.
+- Issue #14738: Speed-up UTF-8 decoding on non-ASCII data. Patch by Serhiy
+ Storchaka.
-- Issue #9428: Fix running scripts with the profile/cProfile modules from the
- command line.
+- Issue #14700: Fix two broken and undefined-behaviour-inducing overflow checks
+ in old-style string formatting.
-- Issue #7781: Fix restricting stats by entry counts in the pstats interactive
- browser.
+- Issue #14705: The PyArg_Parse() family of functions now support the 'p' format
+ unit, which accepts a "boolean predicate" argument. It converts any Python
+ value into an integer--0 if it is "false", and 1 otherwise.
-- Issue #9209: Do not crash in the pstats interactive browser on invalid regular
- expressions.
+Library
+-------
-- Update collections.OrderedDict to match the implementation in Py2.7 (based on
- lists instead of weakly referenced Link objects).
+- Issue #14690: Use monotonic clock instead of system clock in the sched,
+ subprocess and trace modules.
-- Issue #8397: Raise an error when attempting to mix iteration and regular reads
- on a BZ2File object, rather than returning incorrect results.
+- Issue #14958: Change IDLE systax highlighting to recognize all string and
+ byte literals supported in Python 3.3.
-- Issue #9448: Fix a leak of OS resources (mutexes or semaphores) when
- re-initializing a buffered IO object by calling its ``__init__`` method.
+- Issue #10997: Prevent a duplicate entry in IDLE's "Recent Files" menu.
-- Issue #1713: Fix os.path.ismount(), which returned true for symbolic links
- across devices.
+- Issue #14443: Tell rpmbuild to use the correct version of Python in
+ bdist_rpm. Initial patch by Ross Lagerwall.
-- Issue #8826: Properly load old-style "expires" attribute in http.cookies.
+- Issue #14929: Stop Idle 3.x from closing on Unicode decode errors when
+ grepping. Patch by Roger Serwy.
-- Issue #1690103: Fix initial namespace for code run with trace.main().
+- Issue #12515: email now registers a defect if it gets to EOF while parsing
+ a MIME part without seeing the closing MIME boundary.
-- Issue #7395: Fix tracebacks in pstats interactive browser.
+- Issue #12510: Attempting to get invalid tooltip no longer closes Idle.
+ Other tooltipss have been corrected or improved and the number of tests
+ has been tripled. Original patch by Roger Serwy.
-- Issue #8230: Fix Lib/test/sortperf.py.
+- Issue #1672568: email now always decodes base64 payloads, adding padding and
+ ignoring non-base64-alphabet characters if needed, and registering defects
+ for any such problems.
-- Issue #8620: when a cmd.Cmd() is fed input that reaches EOF without a final
- newline, it no longer truncates the last character of the last command line.
+- Issue #14925: email now registers a defect when the parser decides that there
+ is a missing header/body separator line. MalformedHeaderDefect, which the
+ existing code would never actually generate, is deprecated.
-- Issue #5146: Handle UID THREAD command correctly in imaplib.
+- Issue #10365: File open dialog now works instead of crashing even when
+ the parent window is closed before the dialog. Patch by Roger Serwy.
-- Issue #5147: Fix the header generated for cookie files written by
- http.cookiejar.MozillaCookieJar.
+- Issue #8739: Updated smtpd to support RFC 5321, and added support for the
+ RFC 1870 SIZE extension.
-- Issue #8198: In pydoc, output all help text to the correct stream when
- sys.stdout is reassigned.
+- Issue #665194: Added a localtime function to email.utils to provide an
+ aware local datetime for use in setting Date headers.
-- Issue #7909: Do not touch paths with the special prefixes ``\\.\`` or ``\\?\``
- in ntpath.normpath().
+- Issue #12586: Added new provisional policies that implement convenient
+ unicode support for email headers. See What's New for details.
-- Issue #1286: Allow using fileinput.FileInput as a context manager.
+- Issue #14731: Refactored email Policy framework to support full backward
+ compatibility with Python 3.2 by default yet allow for the introduction of
+ new features through new policies. Note that Policy.must_be_7bit is renamed
+ to cte_type.
-- Add lru_cache() decorator to the functools module.
+- Issue #14876: Use user-selected font for highlight configuration.
-Tools/Demos
------------
+- Issue #14920: Fix the help(urllib.parse) failure on locale C on terminals.
+ Have ascii characters in help.
-- Fix ``Tools/scripts/checkpyc.py`` after PEP 3147.
+- Issue #14548: Make multiprocessing finalizers check pid before
+ running to cope with possibility of gc running just after fork.
-- Issue #8867: Fix ``Tools/scripts/serve.py`` to work with files containing
- non-ASCII content.
+- Issue #14863: Update the documentation of os.fdopen() to reflect the
+ fact that it's only a thin wrapper around open() anymore.
-Tests
------
+- Issue #14036: Add an additional check to validate that port in urlparse does
+ not go in illegal range and returns None.
-- Issue #9601: Provide a test case for ftplib.parse257.
+- Issue #14862: Add missing names to os.__all__
-- Issue #8857: Provide a test case for socket.getaddrinfo.
+- Issue #14875: Use float('inf') instead of float('1e66666') in the json module.
-- Issue #7564: Skip test_ioctl if another process is attached to /dev/tty.
+- Issue #13585: Added contextlib.ExitStack
-- Issue #8433: Fix test_curses failure with newer versions of ncurses.
+- PEP 3144, Issue #14814: Added the ipaddress module
-- Issue #9496: Provide a test suite for the rlcompleter module. Patch by
- Michele Orrù.
+- Issue #14426: Correct the Date format in Expires attribute of Set-Cookie
+ Header in Cookie.py.
-- Issue #8687: provide a test suite for sched.py module.
+- Issue #14588: The types module now provide new_class() and prepare_class()
+ functions to support PEP 3115 compliant dynamic class creation. Patch by
+ Daniel Urban and Nick Coghlan.
-Build
------
+- Issue #13152: Allow to specify a custom tabsize for expanding tabs in
+ textwrap. Patch by John Feuerstein.
-- Issue #1303434: Generate ZIP file containing all PDBs.
+- Issue #14721: Send the correct 'Content-length: 0' header when the body is an
+ empty string ''. Initial Patch contributed by Arve Knudsen.
-- Issue #9193: PEP 3149 is accepted.
+- Issue #14072: Fix parsing of 'tel' URIs in urlparse by making the check for
+ ports stricter.
-- Issue #3101: Helper functions _add_one_to_index_C() and _add_one_to_index_F()
- become _Py_add_one_to_index_C() and _Py_add_one_to_index_F(), respectively.
+- Issue #9374: Generic parsing of query and fragment portions of url for any
+ scheme. Supported both by RFC3986 and RFC2396.
-- Issue #9700: define HAVE_BROKEN_POSIX_SEMAPHORES under AIX 6.x. Patch by
- Sébastien Sablé.
+- Issue #14798: Fix the functions in pyclbr to raise an ImportError
+ when the first part of a dotted name is not a package. Patch by
+ Xavier de Gaye.
-- Don't run pgen twice when using make -j.
+- Issue #12098: multiprocessing on Windows now starts child processes
+ using the same sys.flags as the current process. Initial patch by
+ Sergey Mezentsev.
+- Issue #13031: Small speed-up for tarfile when unzipping tarfiles.
+ Patch by Justin Peel.
-What's New in Python 3.2 Alpha 1?
-=================================
+- Issue #14780: urllib.request.urlopen() now has a ``cadefault`` argument
+ to use the default certificate store. Initial patch by James Oakley.
-*Release date: 01-Aug-2010*
+- Issue #14829: Fix bisect and range() indexing with large indices
+ (>= 2 ** 32) under 64-bit Windows.
-Core and Builtins
------------------
+- Issue #14732: The _csv module now uses PEP 3121 module initialization.
+ Patch by Robin Schreiber.
-- Issue #8991: convertbuffer() rejects discontigious buffers.
+- Issue #14809: Add HTTP status codes introduced by RFC 6585 to http.server
+ and http.client. Patch by EungJun Yi.
-- Issue #7616: Fix copying of overlapping memoryview slices with the Intel
- compiler.
+- Issue #14777: tkinter may return undecoded UTF-8 bytes as a string when
+ accessing the Tk clipboard. Modify clipboad_get() to first request type
+ UTF8_STRING when no specific type is requested in an X11 windowing
+ environment, falling back to the current default type STRING if that fails.
+ Original patch by Thomas Kluyver.
-- Issue #8413: structsequence now subclasses tuple.
+- Issue #14773: Fix os.fwalk() failing on dangling symlinks.
-- Issue #8271: during the decoding of an invalid UTF-8 byte sequence, only the
- start byte and the continuation byte(s) are now considered invalid, instead of
- the number of bytes specified by the start byte. E.g.:
- '\xf1\x80AB'.decode('utf-8', 'replace') now returns u'\ufffdAB' and replaces
- with U+FFFD only the start byte ('\xf1') and the continuation byte ('\x80')
- even if '\xf1' is the start byte of a 4-bytes sequence. Previous versions
- returned a single u'\ufffd'.
+- Issue #12541: Be lenient with quotes around Realm field of HTTP Basic
+ Authentation in urllib2.
-- Issue #9011: A negated imaginary literal (e.g., "-7j") now has real part -0.0
- rather than 0.0. So "-7j" is now exactly equivalent to "-(7j)".
+- Issue #14807: move undocumented tarfile.filemode() to stat.filemode() and add
+ doc entry. Add tarfile.filemode alias with deprecation warning.
-- Be more specific in error messages about positional arguments.
+- Issue #13815: TarFile.extractfile() now returns io.BufferedReader objects.
-- Issue #8949: "z" format of PyArg_Parse*() functions doesn't accept bytes
- objects, as described in the documentation.
+- Issue #14532: Add a secure_compare() helper to the hmac module, to mitigate
+ timing attacks. Patch by Jon Oberheide.
-- Issue #6543: Write the traceback in the terminal encoding instead of utf-8.
- Fix the encoding of the modules filename. Patch written by Amaury Forgeot
- d'Arc.
+- Add importlib.util.resolve_name().
-- Issue #9011: Remove buggy and unnecessary (in 3.x) ST->AST compilation code
- dealing with unary minus applied to a constant. The removed code was mutating
- the ST, causing a second compilation to fail.
+- Issue #14366: Support lzma compression in zip files.
+ Patch by Serhiy Storchaka.
-- Issue #850997: mbcs encoding (Windows only) handles errors argument: strict
- mode raises unicode errors. The encoder only supports "strict" and "replace"
- error handlers, the decoder only supports "strict" and "ignore" error
- handlers. Patch written by Mark Hammond.
+- Issue #13959: Introduce importlib.find_loader() and document
+ imp.find_module/load_module as deprecated.
-- Issue #8850: Remove "w" and "w#" formats from PyArg_Parse*() functions, use
- "w*" format instead. Add tests for "w*" format.
+- Issue #14082: shutil.copy2() now copies extended attributes, if possible.
+ Patch by Hynek Schlawack.
-- Issue #8592: PyArg_Parse*() functions raise a TypeError for "y", "u" and "Z"
- formats if the string contains a null byte/character. Write unit tests for
- string formats.
+- Issue #13959: Make importlib.abc.FileLoader.load_module()/get_filename() and
+ importlib.machinery.ExtensionFileLoader.load_module() have their single
+ argument be optional. Allows for the replacement (and thus deprecation) of
+ imp.load_source()/load_package()/load_compiled().
-- Issue #7490: To facilitate sharing of doctests between 2.x and 3.x test
- suites, the IGNORE_EXCEPTION_DETAIL directive now also ignores the module
- location of the raised exception.
+- Issue #13959: imp.get_suffixes() has been deprecated in favour of the new
+ attributes on importlib.machinery: SOURCE_SUFFIXES, DEBUG_BYTECODE_SUFFIXES,
+ OPTIMIZED_BYTECODE_SUFFIXES, BYTECODE_SUFFIXES, and EXTENSION_SUFFIXES. This
+ led to an indirect deprecation of inspect.getmoduleinfo().
-- Issue #8969: On Windows, use mbcs codec in strict mode to encode and decode
- filenames and enable os.fsencode().
+- Issue #14662: Prevent shutil failures on OS X when destination does not
+ support chflag operations. Patch by Hynek Schlawack.
-- Issue #9058: Remove assertions about INT_MAX in UnicodeDecodeError.
+- Issue #14157: Fix time.strptime failing without a year on February 29th.
+ Patch by Hynek Schlawack.
-- Issue #8941: Decoding big endian UTF-32 data in UCS-2 builds could crash the
- interpreter with characters outside the Basic Multilingual Plane (higher than
- 0x10000).
+- Issue #14753: Make multiprocessing's handling of negative timeouts
+ the same as it was in Python 3.2.
-- Issue #8950: (See also issue #5080). Py_ArgParse*() functions now raise
- TypeError instead of giving a DeprecationWarning when a float is parsed using
- the 'L' code (for long long). (All other integer codes already raise
- TypeError in this case.)
+- Issue #14583: Fix importlib bug when a package's __init__.py would first
+ import one of its modules then raise an error.
-- Issue #8922: Normalize the encoding name in PyUnicode_AsEncodedString() to
- enable shortcuts for upper case encoding name. Add also a shortcut for
- "iso-8859-1" in PyUnicode_AsEncodedString() and PyUnicode_Decode().
+- Issue #14741: Fix missing support for Ellipsis ('...') in parser module.
-- Issue #8838: Remove codecs.charbuffer_encode() function. The buffer protocol
- doesn't support "char buffer" anymore in Python 3.
+- Issue #14697: Fix missing support for set displays and set comprehensions in
+ parser module.
-- Issue #8339: Remove "t#" format of PyArg_Parse*() functions, use "s#" or "s*"
- instead. codecs.charbuffer_encode() now accepts modifiable buffer objects
- like bytearray.
+- Issue #14701: Fix missing support for 'raise ... from' in parser module.
-- Issue #8837: Remove "O?" format of PyArg_Parse*() functions. The format is no
- used anymore and it was never documented.
+- Add support for timeouts to the acquire() methods of
+ multiprocessing's lock/semaphore/condition proxies.
-- In str.format(), raise a ValueError when indexes to arguments are too large.
+- Issue #13989: Add support for text mode to gzip.open().
-- Issue #2844: Make int('42', n) consistently raise ValueError for invalid
- integers n (including n = -909).
+- Issue #14127: The os.stat() result object now provides three additional
+ fields: st_ctime_ns, st_mtime_ns, and st_atime_ns, providing those times as an
+ integer with nanosecond resolution. The functions os.utime(), os.lutimes(),
+ and os.futimes() now accept a new parameter, ns, which accepts mtime and atime
+ as integers with nanosecond resolution.
-- Issue #8188: Introduce a new scheme for computing hashes of numbers (instances
- of int, float, complex, decimal.Decimal and fractions.Fraction) that makes it
- easy to maintain the invariant that hash(x) == hash(y) whenever x and y have
- equal value.
+- Issue #14127 and #10148: shutil.copystat now preserves exact mtime and atime
+ on filesystems providing nanosecond resolution.
-- Issue #8748: Fix two issues with comparisons between complex and integer
- objects. (1) The comparison could incorrectly return True in some cases
- (2**53+1 == complex(2**53) == 2**53), breaking transitivity of equality.
- (2) The comparison raised an OverflowError for large integers, leading to
- unpredictable exceptions when combining integers and complex objects in sets
- or dicts.
+Tools/Demos
+-----------
-- Issue #8766: Initialize _warnings module before importing the first module.
- Fix a crash if an empty directory called "encodings" exists in sys.path.
+- Issue #14695: Bring Tools/parser/unparse.py support up to date with
+ the Python 3.3 Grammar.
-- Issue #8589: Decode PYTHONWARNINGS environment variable with the file system
- encoding and surrogateescape error handler instead of the locale encoding to
- be consistent with os.environ. Add PySys_AddWarnOptionUnicode() function.
+Build
+-----
-- PyObject_Dump() encodes unicode objects to utf8 with backslashreplace (instead
- of strict) error handler to escape surrogates.
+- Issue #14472: Update .gitignore. Patch by Matej Cepl.
-- Issue #8715: Create PyUnicode_EncodeFSDefault() function: Encode a Unicode
- object to Py_FileSystemDefaultEncoding with the "surrogateescape" error
- handler, and return bytes. If Py_FileSystemDefaultEncoding is not set, fall
- back to UTF-8.
+- Upgrade Windows library versions: bzip 1.0.6, OpenSSL 1.0.1c.
-- Enable shortcuts for common encodings in PyUnicode_AsEncodedString() for any
- error handler, not only the default error handler (strict).
+- Issue #14693: Under non-Windows platforms, hashlib's fallback modules are
+ always compiled, even if OpenSSL is present at build time.
-- Issue #8610: Load file system codec at startup, and display a fatal error on
- failure. Set the file system encoding to utf-8 (instead of None) if getting
- the locale encoding failed, or if nl_langinfo(CODESET) function is missing.
+- Issue #13210: Windows build now uses VS2010, ported from VS2008.
-- PyFile_FromFd() uses PyUnicode_DecodeFSDefault() instead of
- PyUnicode_FromString() to support surrogates in the filename and use the right
- encoding.
+Documentation
+-------------
-- Issue #7507: Quote "!" in pipes.quote(); it is special to some shells.
+- Issue #14588: The language reference now accurately documents the Python 3
+ class definition process. Patch by Nick Coghlan.
-- PyUnicode_DecodeFSDefaultAndSize() uses surrogateescape error handler.
+- Issue #14943: Correct a default argument value for winreg.OpenKey
+ and correctly list the argument names in the function's explanation.
-- Issue #8419: Prevent the dict constructor from accepting non-string keyword
- arguments.
-- Issue #8124: PySys_WriteStdout() and PySys_WriteStderr() don't execute
- indirectly Python signal handlers anymore because mywrite() ignores exceptions
- (KeyboardInterrupt).
+What's New in Python 3.3.0 Alpha 3?
+===================================
-- Issue #8092: Fix PyUnicode_EncodeUTF8() to support error handler producing
- unicode string (eg. backslashreplace).
+*Release date: 01-May-2012*
-- Issue #8485: PyUnicode_FSConverter() doesn't accept byteearray objects
- anymore, you have to convert your bytearray filenames to bytes.
+Core and Builtins
+-----------------
-- Issue #7332: Remove the 16KB stack-based buffer in
- PyMarshal_ReadLastObjectFromFile, which doesn't bring any noticeable benefit
- compared to the dynamic memory allocation fallback. Patch by Charles-François
- Natali.
+- Issue #14699: Fix calling the classmethod descriptor directly.
-- Issue #8417: Raise an OverflowError when an integer larger than sys.maxsize is
- passed to bytes or bytearray.
+- Issue #14433: Prevent msvcrt crash in interactive prompt when stdin is closed.
-- Issue #7301: Add environment variable $PYTHONWARNINGS.
+- Issue #14521: Make result of float('nan') and float('-nan') more consistent
+ across platforms.
-- Issue #8329: Don't return the same lists from select.select when no fds are
- changed.
+- Issue #14646: __import__() sets __loader__ if the loader did not.
-- Issue #8259: 1L << (2**31) no longer produces an 'outrageous shift error' on
- 64-bit machines. The shift count for either left or right shift is permitted
- to be up to sys.maxsize.
+- Issue #14605: No longer have implicit entries in sys.meta_path. If
+ sys.meta_path is found to be empty, raise ImportWarning.
-- Ensure that tokenization of identifiers is not affected by locale.
+- Issue #14605: No longer have implicit entries in sys.path_hooks. If
+ sys.path_hooks is found to be empty, a warning will be raised. None is now
+ inserted into sys.path_importer_cache if no finder was discovered. This also
+ means imp.NullImporter is no longer implicitly used.
-- Issue #1222585: Added LDCXXSHARED for C++ support. Patch by Arfrever.
+- Issue #13903: Implement PEP 412. Individual dictionary instances can now share
+ their keys with other dictionaries. Classes take advantage of this to share
+ their instance dictionary keys for improved memory and performance.
-- Raise a TypeError when trying to delete a T_STRING_INPLACE struct member.
+- Issue #11603 (again): Setting __repr__ to __str__ now raises a RuntimeError
+ when repr() or str() is called on such an object.
-- Issue #8211: Save/restore CFLAGS around AC_PROG_CC in configure.in, in case it
- is set.
+- Issue #14658: Fix binding a special method to a builtin implementation of a
+ special method with a different name.
-- Issue #8226: sys.setfilesystemencoding() raises a LookupError if the encoding
- is unknown.
+- Issue #14630: Fix a memory access bug for instances of a subclass of int
+ with value 0.
-- Issue #1583863: A str subclass can now override the __str__ method.
+- Issue #14339: Speed improvements to bin, oct and hex functions. Patch by
+ Serhiy Storchaka.
-- Issue #8014: Setting a T_UINT or T_PYSSIZET attribute of an object with
- PyMemberDefs could produce an internal error; raise TypeError instead.
+- Issue #14098: New functions PyErr_GetExcInfo and PyErr_SetExcInfo.
+ Patch by Stefan Behnel.
-- Issue #7845: Rich comparison methods on the complex type now return
- NotImplemented rather than raising a TypeError when comparing with an
- incompatible type; this allows user-defined classes to implement their own
- comparisons with complex.
+- Issue #14385: It is now possible to use a custom type for the __builtins__
+ namespace, instead of a dict. It can be used for sandboxing for example.
+ Raise also a NameError instead of ImportError if __build_class__ name if not
+ found in __builtins__.
-- Issue #3137: Don't ignore errors at startup, especially a keyboard interrupt
- (SIGINT). If an error occurs while importing the site module, the error is
- printed and Python exits. Initialize the GIL before importing the site module.
+- Issue #12599: Be more strict in accepting None compared to a false-like
+ object for importlib.util.module_for_loader and
+ importlib.machinery.PathFinder.
-- Issue #7173: Generator finalization could invalidate sys.exc_info().
+- Issue #14612: Fix jumping around with blocks by setting f_lineno.
-- Issue #7544: Preallocate thread memory before creating the thread to avoid a
- fatal error in low memory condition.
+- Issue #14592: Attempting a relative import w/o __package__ or __name__ set in
+ globals raises a KeyError.
-- Issue #7820: The parser tokenizer restores all bytes in the right if the BOM
- check fails.
+- Issue #14607: Fix keyword-only arguments which started with ``__``.
-- Handle errors from looking up __prepare__ correctly.
+- Issue #10854: The ImportError raised when an extension module on Windows
+ fails to import now uses the new path and name attributes from
+ Issue #1559549.
-- Issue #5939: Add additional runtime checking to ensure a valid capsule in
- Modules/_ctypes/callproc.c.
+- Issue #13889: Check and (if necessary) set FPU control word before calling
+ any of the dtoa.c string <-> float conversion functions, on MSVC builds of
+ Python. This fixes issues when embedding Python in a Delphi app.
-- Issue #7309: Fix unchecked attribute access when converting
- UnicodeEncodeError, UnicodeDecodeError, and UnicodeTranslateError to strings.
+- __import__() now matches PEP 328 and documentation by defaulting 'index' to 0
+ instead of -1 and removing support for negative values.
-- Issue #6902: Fix problem with built-in types format incorrectly with 0
- padding.
+- Issue #2377: Make importlib the implementation of __import__().
-- Issue #7988: Fix default alignment to be right aligned for complex.__format__.
- Now it matches other numeric types.
+- Issue #1559549: ImportError now has 'name' and 'path' attributes that are set
+ using keyword arguments to its constructor. They are currently not set by
+ import as they are meant for use by importlib.
-- Issue #5988: Remove deprecated functions PyOS_ascii_formatd,
- PyOS_ascii_strtod, and PyOS_ascii_atof. Use PyOS_double_to_string and
- PyOS_string_to_double instead. See issue #5835 for the original deprecations.
+- Issue #14474: Save and restore exception state in thread.start_new_thread()
+ while writing error message if the thread leaves a unhandled exception.
-- Issue #7385: Fix a crash in `MemoryView_FromObject` when `PyObject_GetBuffer`
- fails. Patch by Florent Xicluna.
+- Issue #13019: Fix potential reference leaks in bytearray.extend(). Patch
+ by Suman Saha.
-- Issue #7788: Fix an interpreter crash produced by deleting a list slice with
- very large step value.
+Library
+-------
-- Issue #7766: Change sys.getwindowsversion() return value to a named tuple and
- add the additional members returned in an OSVERSIONINFOEX structure. The new
- members are service_pack_major, service_pack_minor, suite_mask, and
- product_type.
+- Issue #14768: os.path.expanduser('~/a') doesn't works correctly when HOME is '/'.
-- Issue #7561: Operations on empty bytearrays (such as `int(bytearray())`) could
- crash in many places because of the PyByteArray_AS_STRING() macro returning
- NULL. The macro now returns a statically allocated empty string instead.
+- Issue #14371: Support bzip2 in zipfile module. Patch by Serhiy Storchaka.
-- Issue #6690: Optimize the bytecode for expressions such as `x in {1, 2, 3}`,
- where the right hand operand is a set of constants, by turning the set into a
- frozenset and pre-building it as a constant. The comparison operation is made
- against the constant instead of building a new set each time it is executed (a
- similar optimization already existed which turned a list of constants into a
- pre-built tuple). Patch and additional tests by Dave Malcolm.
+- Issue #13183: Fix pdb skipping frames after hitting a breakpoint and running
+ step. Patch by Xavier de Gaye.
-- Issue #7622: Improve the split(), rsplit(), splitlines() and replace() methods
- of bytes, bytearray and unicode objects by using a common implementation based
- on stringlib's fast search. Patch by Florent Xicluna.
+- Issue #14696: Fix parser module to understand 'nonlocal' declarations.
-- Issue #7632: Fix various str -> float conversion bugs present in 2.7 alpha 2,
- including: (1) a serious 'wrong output' bug that could occur for long (> 40
- digit) input strings, (2) a crash in dtoa.c that occurred in debug builds when
- parsing certain long numeric strings corresponding to subnormal values, (3) a
- memory leak for some values large enough to cause overflow, and (4) a number
- of flaws that could lead to incorrectly rounded results.
+- Issue #10941: Fix imaplib.Internaldate2tuple to produce correct result near
+ the DST transition. Patch by Joe Peterson.
-- The __complex__ method is now looked up on the class of instances to make it
- consistent with other special methods.
+- Issue #9154: Fix parser module to understand function annotations.
-- Issue #7462: Implement the stringlib fast search algorithm for the `rfind`,
- `rindex`, `rsplit` and `rpartition` methods. Patch by Florent Xicluna.
+- Issue #6085: In http.server.py SimpleHTTPServer.address_string returns the
+ client ip address instead client hostname. Patch by Charles-François Natali.
-- Issue #7604: Deleting an unset slotted attribute did not raise an
- AttributeError.
+- Issue #14309: Deprecate time.clock(), use time.perf_counter() or
+ time.process_time() instead.
-- Issue #7534: Fix handling of IEEE specials (infinities, nans, negative zero)
- in ** operator. The behaviour now conforms to that described in C99 Annex F.
+- Issue #14428: Implement the PEP 418. Add time.get_clock_info(),
+ time.perf_counter() and time.process_time() functions, and rename
+ time.steady() to time.monotonic().
-- Issue #1811: improve accuracy and cross-platform consistency for true division
- of integers: the result of a/b is now correctly rounded for ints a and b (at
- least on IEEE 754 platforms), and in particular does not depend on the
- internal representation of an int.
+- Issue #14646: importlib.util.module_for_loader() now sets __loader__ and
+ __package__ (when possible).
-- Issue #6834: replace the implementation for the 'python' and 'pythonw'
- executables on OSX.
+- Issue #14664: It is now possible to use @unittest.skip{If,Unless} on a
+ test class that doesn't inherit from TestCase (i.e. a mixin).
- These executables now work properly with the arch(1) command: ``arch -ppc
- python`` will start a universal binary version of python in PPC mode (unlike
- previous releases).
+- Issue #4892: multiprocessing Connections can now be transferred over
+ multiprocessing Connections. Patch by Richard Oudkerk (sbt).
-- Issue #7466: Segmentation fault when the garbage collector is called in the
- middle of populating a tuple. Patch by Florent Xicluna.
+- Issue #14160: TarFile.extractfile() failed to resolve symbolic links when
+ the links were not located in an archive subdirectory.
-- Issue #7419: setlocale() could crash the interpreter on Windows when called
- with invalid values.
+- Issue #14638: pydoc now treats non-string __name__ values as if they
+ were missing, instead of raising an error.
-- Issue #6077: On Windows, files opened with tempfile.TemporaryFile in "wt+"
- mode would appear truncated on the first '0x1a' byte (aka. Ctrl+Z).
+- Issue #13684: Fix httplib tunnel issue of infinite loops for certain sites
+ which send EOF without trailing \r\n.
-- Issue #7085: Fix crash when importing some extensions in a thread on MacOSX
- 10.6.
+- Issue #14605: Add importlib.abc.FileLoader, importlib.machinery.(FileFinder,
+ SourceFileLoader, SourcelessFileLoader, ExtensionFileLoader).
-- Issue #1757126: Fix the cyrillic-asian alias for the ptcp154 encoding.
+- Issue #13959: imp.cache_from_source()/source_from_cache() now follow
+ os.path.join()/split() semantics for path manipulation instead of its prior,
+ custom semantics of caring the right-most path separator forward in path
+ joining.
-- Issue #6970: Remove redundant calls when comparing objects that don't
- implement the relevant rich comparison methods.
+- Issue #2193: Allow ":" character in Cookie NAME values.
-- Issue #7298: Fixes for range and reversed(range(...)). Iteration over
- range(a, b, c) incorrectly gave an empty iterator when a, b and c fit in C
- long but the length of the range did not. Also fix several cases where
- reversed(range(a, b, c)) gave wrong results, and fix a refleak for
- reversed(range(a, b, c)) with large arguments.
+- Issue #14629: tokenizer.detect_encoding will specify the filename in the
+ SyntaxError exception if found at readline.__self__.name.
-- Issue #7244: itertools.izip_longest() no longer ignores exceptions raised
- during the formation of an output tuple.
+- Issue #14629: Raise SyntaxError in tokenizer.detect_encoding if the
+ first two lines have non-UTF-8 characters without an encoding declaration.
-- Issue #3297: On wide unicode builds, do not split unicode characters into
- surrogates.
+- Issue #14308: Fix an exception when a "dummy" thread is in the threading
+ module's active list after a fork().
-- Remove length limitation when constructing a complex number from a string.
+- Issue #11750: The Windows API functions scattered in the _subprocess and
+ _multiprocessing.win32 modules now live in a single module "_winapi".
+ Patch by sbt.
-- Issue #1087418: Boost performance of bitwise operations for longs.
+- Issue #14087: multiprocessing: add Condition.wait_for(). Patch by sbt.
-- Support for AtheOS has been completely removed from the code base. It was
- disabled since Python 3.0.
+- Issue #14538: HTMLParser can now parse correctly start tags that contain
+ a bare '/'.
-- Support for several legacy threading libraries has been disabled. These
- libraries are: Mach C threads, SunOS LWP, GNU pth, Irix threads. Support code
- will be entirely removed in 3.3.
+- Issue #14452: SysLogHandler no longer inserts a UTF-8 BOM into the message.
-- Support for OSF* has been disabled. If nobody stands up, support will be
- removed in 3.3. See <http://bugs.python.org/issue8606>.
+- Issue #14386: Expose the dict_proxy internal type as types.MappingProxyType.
-- Peephole constant folding had missed UNARY_POSITIVE.
+- Issue #13959: Make imp.reload() always use a module's __loader__ to perform
+ the reload.
-- Issue #1722344: threading._shutdown() is now called in Py_Finalize(), which
- fixes the problem of some exceptions being thrown at shutdown when the
- interpreter is killed. Patch by Adam Olsen.
+- Issue #13959: Add imp.py and rename the built-in module to _imp, allowing for
+ re-implementing parts of the module in pure Python.
-- Issue #7147: Remove support for compiling Python without complex number
- support.
+- Issue #13496: Fix potential overflow in bisect.bisect algorithm when applied
+ to a collection of size > sys.maxsize / 2.
-- Issue #7120: logging: Removed import of multiprocessing which is causing crash
- in GAE.
+- Have importlib take advantage of ImportError's new 'name' and 'path'
+ attributes.
-- Issue #1754094: Improve the stack depth calculation in the compiler. There
- should be no other effect than a small decrease in memory use. Patch by
- Christopher Tur Lesniewski-Laas.
+- Issue #14399: zipfile now recognizes that the archive has been modified even
+ if only the comment is changed. In addition, the TypeError that results from
+ trying to set a non-binary value as a comment is now now raised at the time
+ the comment is set rather than at the time the zipfile is written.
-- Issue #7065: Fix a crash in bytes.maketrans and bytearray.maketrans when using
- byte values greater than 127. Patch by Derk Drukker.
+- trace.CoverageResults.is_ignored_filename() now ignores any name that starts
+ with "<" and ends with ">" instead of special-casing "<string>" and
+ "<doctest ".
-- Issue #1571184: The Unicode database contains properties for more characters.
- The tables for code points representing numeric values, white spaces or line
- breaks are now generated from the official Unicode Character Database files,
- and include information from the Unihan.txt file.
+- Issue #12537: The mailbox module no longer depends on knowledge of internal
+ implementation details of the email package Message object.
-- Issue #7019: Raise ValueError when unmarshalling bad long data, instead of
- producing internally inconsistent Python longs.
+- Issue #7978: socketserver now restarts the select() call when EINTR is
+ returned. This avoids crashing the server loop when a signal is received.
+ Patch by Jerzy Kozera.
-- Issue #6990: Fix threading.local subclasses leaving old state around after a
- reference cycle GC which could be recycled by new locals.
+- Issue #14522: Avoid duplicating socket handles in multiprocessing.connection.
+ Patch by sbt.
-- Issue #5460: Fix an ambiguity in the grammar.
+- Don't Py_DECREF NULL variable in io.IncrementalNewlineDecoder.
-- Issue #1766304: Improve performance of membership tests on range objects.
+- Issue #8515: Set __file__ when run file in IDLE.
+ Initial patch by Bruce Frederiksen.
-- Issue #6713: Improve performance of integer -> string conversions.
+- Issue #14496: Fix wrong name in idlelib/tabbedpages.py.
+ Patch by Popa Claudiu.
-- Issue #6846: Fix bug where bytearray.pop() returns negative integers.
+- Issue #3033: Add displayof parameter to tkinter font. Patch by Guilherme Polo.
-- Issue #6750: A text file opened with io.open() could duplicate its output when
- writing from multiple threads at the same time.
+- Issue #14482: Raise a ValueError, not a NameError, when trying to create
+ a multiprocessing Client or Listener with an AF_UNIX type address under
+ Windows. Patch by Popa Claudiu.
-- Issue #6707: dir() on an uninitialized module caused a crash.
+- Issue #802310: Generate always unique tkinter font names if not directly passed.
-- Issue #6540: Fixed crash for bytearray.translate() with invalid parameters.
+- Issue #14151: Raise a ValueError, not a NameError, when trying to create
+ a multiprocessing Client or Listener with an AF_PIPE type address under
+ non-Windows platforms. Patch by Popa Claudiu.
-- Issue #6573: set.union() stopped processing inputs if an instance of self
- occurred in the argument chain.
+- Issue #14493: Use gvfs-open or xdg-open in webbrowser.
-- Issue #6070: On posix platforms import no longer copies the execute bit from
- the .py file to the .pyc file if it is set.
+Build
+-----
-- Issue #1616979: Added the cp720 (Arabic DOS) encoding.
+- "make touch" will now touch generated files that are checked into Mercurial,
+ after a "hg update" which failed to bring the timestamps into the right order.
-- Issue #6428: Since Python 3.0, the __bool__ method must return a bool object,
- and not an int. Fix the corresponding error message, and the documentation.
+Tests
+-----
-- The deprecated PyCObject has been removed.
+- Issue #14026: In test_cmd_line_script, check that sys.argv is populated
+ correctly for the various invocation approaches (Patch by Jason Yeo)
-- Issue #6347: Include inttypes.h as well as stdint.h in pyport.h. This fixes a
- build failure on HP-UX: int32_t and uint32_t are defined in inttypes.h instead
- of stdint.h on that platform.
+- Issue #14032: Fix incorrect variable name in test_cmd_line_script debugging
+ message (Patch by Jason Yeo)
-- Issue #6373: Fixed a SystemError when encoding with the latin-1 codec and the
- 'surrogateescape' error handler, a string which contains unpaired surrogates.
+- Issue #14589: Update certificate chain for sha256.tbs-internet.com, fixing
+ a test failure in test_ssl.
-- Issue #4856: Remove checks for win NT.
+- Issue #14355: Regrtest now supports the standard unittest test loading, and
+ will use it if a test file contains no `test_main` method.
-- Issue #6687: PyBytes_FromObject() no longer accepts an integer as its argument
- to construct a null-initialized bytes object.
+Tools / Demos
+-------------
-- Issue #1023290: Add from_bytes() and to_bytes() methods to integers. These
- methods allow the conversion of integers to bytes, and vice-versa.
+- Issue #3561: The Windows installer now has an option, off by default, for
+ placing the Python installation into the system "Path" environment variable.
-- Issue #7382: Fix bug in bytes.__getnewargs__ that prevented bytes instances
- from being copied with copy.copy(), and bytes subclasses from being pickled
- properly.
+- Issue #13165: stringbench is now available in the Tools/stringbench folder.
+ It used to live in its own SVN project.
-- Code objects now support weak references.
-- Issue #7072: isspace(0xa0) is true on Mac OS X.
+What's New in Python 3.3.0 Alpha 2?
+===================================
-- Issue #8084: PEP 370 now conforms to system conventions for framework builds
- on MacOS X. That is, "python setup.py install --user" will install into
- "~/Library/Python/2.7" instead of "~/.local".
+*Release date: 01-Apr-2012*
-C-API
------
+Core and Builtins
+-----------------
-- Issue #2443: A new macro, `Py_VA_COPY`, copies the state of the
- variable argument list. `Py_VA_COPY` is equivalent to C99
- `va_copy`, but available on all python platforms.
+- Issue #1683368: object.__new__ and object.__init__ raise a TypeError if they
+ are passed arguments and their complementary method is not overridden.
-- PySlice_GetIndicesEx now clips the step to [-PY_SSIZE_T_MAX, PY_SSIZE_T_MAX]
- instead of [-PY_SSIZE_T_MAX-1, PY_SSIZE_T_MAX]. This makes it safe to do
- "step = -step" when reversing a slice.
+- Issue #14378: Fix compiling ast.ImportFrom nodes with a "__future__" string as
+ the module name that was not interned.
+
+- Issue #14331: Use significantly less stack space when importing modules by
+ allocating path buffers on the heap instead of the stack.
-- Issue #5753: A new C API function, `PySys_SetArgvEx`, allows embedders of the
- interpreter to set sys.argv without also modifying sys.path. This helps fix
- `CVE-2008-5983
- <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5983>`_.
+- Issue #14334: Prevent in a segfault in type.__getattribute__ when it was not
+ passed strings.
-- Add PyArg_ValidateKeywordArguments, which checks if all keyword arguments are
- strings in an efficient manner.
+- Issue #1469629: Allow cycles through an object's __dict__ slot to be
+ collected. (For example if ``x.__dict__ is x``).
-- Issue #8276: PyEval_CallObject() is now only available in macro form. The
- function declaration, which was kept for backwards compatibility reasons, is
- now removed (the macro was introduced in 1997!).
+- Issue #14205: dict lookup raises a RuntimeError if the dict is modified
+ during a lookup.
-- Issue #7767: New function PyLong_AsLongLongAndOverflow added, analogous to
- PyLong_AsLongAndOverflow.
+- Issue #14220: When a generator is delegating to another iterator with the
+ yield from syntax, it needs to have its ``gi_running`` flag set to True.
-- Make PyUnicode_CompareWithASCIIString return not equal if the Python string
- has '\0' at the end.
+- Issue #14435: Remove dedicated block allocator from floatobject.c and rely
+ on the PyObject_Malloc() api like all other objects.
-- Issue #5080: The argument parsing functions PyArg_ParseTuple,
- PyArg_ParseTupleAndKeywords, PyArg_VaParse, PyArg_VaParseTupleAndKeywords and
- PyArg_Parse now raise a DeprecationWarning for float arguments passed with the
- 'L' format code. This will become a TypeError in a future version of Python,
- to match the behaviour of the other integer format codes.
+- Issue #14471: Fix a possible buffer overrun in the winreg module.
-- Issue #7033: Function ``PyErr_NewExceptionWithDoc()`` added.
+- Issue #14288: Allow the serialization of builtin iterators
-- Issue #7414: 'C' code wasn't being skipped properly (for keyword arguments) in
- PyArg_ParseTupleAndKeywords.
+Library
+-------
-- Issue #7228: Add '%lld' and '%llu' support to PyString_FromFormat(V) and
- PyErr_Format, on machines with HAVE_LONG_LONG defined.
+- Issue #14300: Under Windows, sockets created using socket.dup() now allow
+ overlapped I/O. Patch by sbt.
-- Issue #6151: Made PyDescr_COMMON conform to standard C (like PyObject_HEAD in
- PEP 3123). The PyDescr_TYPE and PyDescr_NAME macros should be should used for
- accessing the d_type and d_name members of structures using PyDescr_COMMON.
+- Issue #13872: socket.detach() now marks the socket closed (as mirrored
+ in the socket repr()). Patch by Matt Joiner.
-- Issue #6405: Remove duplicate type declarations in descrobject.h.
+- Issue #14406: Fix a race condition when using ``concurrent.futures.wait(
+ return_when=ALL_COMPLETED)``. Patch by Matt Joiner.
-- The code flags for old __future__ features are now available again.
+- Issue #5136: deprecate old, unused functions from tkinter.
-- Issue #5954: Add a PyFrame_GetLineNumber() function to replace most uses of
- PyCode_Addr2Line().
+- Issue #14409: IDLE now properly executes commands in the Shell window
+ when it cannot read the normal config files on startup and
+ has to use the built-in default key bindings.
+ There was previously a bug in one of the defaults.
-- Issue #5959: Add a PyCode_NewEmpty() function to create a new empty code
- object at a specified file, function, and line number.
+- Issue #14416: syslog now defines the LOG_ODELAY and LOG_AUTHPRIV constants
+ if they are defined in <syslog.h>.
-- Issue #1419652: Change the first argument to PyImport_AppendInittab() to
- ``const char *`` as the string is stored beyond the call.
+- IDLE can be launched as python -m idlelib
-- Issue #2422: When compiled with the ``--with-valgrind`` option, the pymalloc
- allocator will be automatically disabled when running under Valgrind. This
- gives improved memory leak detection when running under Valgrind, while taking
- advantage of pymalloc at other times.
+- Issue #14295: Add unittest.mock
-Library
--------
+- Issue #7652: Add --with-system-libmpdec option to configure for linking
+ the _decimal module against an installed libmpdec.
-- In pdb, when Ctrl-C is entered while defining commands for a breakpoint, the
- old commands are restored.
+- Issue #14380: MIMEText now defaults to utf-8 when passed non-ASCII unicode
+ with no charset specified.
-- For traceback debugging, the pdb listing now also shows the locations where
- the exception was originally (re)raised, if it differs from the last line
- executed (e.g. in case of finally clauses).
+- Issue #10340: asyncore - properly handle EINVAL in dispatcher constructor on
+ OSX; avoid to call handle_connect in case of a disconnected socket which
+ was not meant to connect.
-- The pdb command "source" has been added. It displays the source code for a
- given object, if possible.
+- Issue #14204: The ssl module now has support for the Next Protocol
+ Negotiation extension, if available in the underlying OpenSSL library.
+ Patch by Colin Marc.
-- The pdb command "longlist" has been added. It displays the whole source code
- for the current function.
+- Issue #3035: Unused functions from tkinter are marked as pending deprecated.
-- Issue #1503502: Make pdb.Pdb easier to subclass by putting message and error
- output into methods.
+- Issue #12757: Fix the skipping of doctests when python is run with -OO so
+ that it works in unittest's verbose mode as well as non-verbose mode.
-- Issue #809887: Make the output of pdb's breakpoint deletions more consistent;
- emit a message when a breakpoint is enabled or disabled.
+- Issue #7652: Integrate the decimal floating point libmpdec library to speed
+ up the decimal module. Performance gains of the new C implementation are
+ between 10x and 100x, depending on the application.
-- Issue #5294: Fix the behavior of pdb's "continue" command when called in the
- top-level debugged frame.
+- Issue #3573: IDLE hangs when passing invalid command line args
+ (directory(ies) instead of file(s)) (Patch by Guilherme Polo)
-- Issue #5727: Restore the ability to use readline when calling into pdb in
- doctests.
+- Issue #14269: SMTPD now conforms to the RFC and requires a HELO command
+ before MAIL, RCPT, or DATA.
-- Issue #6719: In pdb, do not stop somewhere in the encodings machinery if the
- source file to be debugged is in a non-builtin encoding.
+- Issue #13694: asynchronous connect in asyncore.dispatcher does not set addr
+ attribute.
-- Issue #8048: Prevent doctests from failing when sys.displayhook has been
- reassigned.
+- Issue #14344: fixed the repr of email.policy objects.
-- Issue #8015: In pdb, do not crash when an empty line is entered as a
- breakpoint command.
+- Issue #11686: Added missing entries to email package __all__ lists
+ (mostly the new Bytes classes).
-- In pdb, allow giving a line number to the "until" command.
+- Issue #14335: multiprocessing's custom Pickler subclass now inherits from
+ the C-accelerated implementation. Patch by sbt.
-- Issue #1437051: For pdb, allow "continue" and related commands in .pdbrc
- files. Also, add a command-line option "-c" that runs a command as if given
- in .pdbrc.
+- Issue #10484: Fix the CGIHTTPServer's PATH_INFO handling problem.
-- Issue #4179: In pdb, allow "list ." as a command to return to the currently
- debugged line.
+- Issue #11199: Fix the with urllib which hangs on particular ftp urls.
-- Issue #4108: In urllib.robotparser, if there are multiple ``User-agent: *``
- entries, consider the first one.
+- Improve the memory utilization and speed of functools.lru_cache.
-- Issue #6630: Allow customizing regex flags when subclassing the
- string.Template class.
+- Issue #14222: Use the new time.steady() function instead of time.time() for
+ timeout in queue and threading modules to not be affected of system time
+ update.
-- Issue #9411: Allow specifying an encoding for config files in the configparser
- module.
+- Issue #13248: Remove lib2to3.pytree.Base.get_prefix/set_prefix.
-- Issue #1682942: Improvements to configparser: support alternate delimiters,
- alternate comment prefixes and empty lines in values.
+- Issue #14234: CVE-2012-0876: Randomize hashes of xml attributes in the hash
+ table internal to the pyexpat module's copy of the expat library to avoid a
+ denial of service due to hash collisions. Patch by David Malcolm with some
+ modifications by the expat project.
-- Issue #9354: Provide getsockopt() in asyncore's file_wrapper.
+- Issue #14200: Idle shell crash on printing non-BMP unicode character.
-- Issue #8966: ctypes: Remove implicit bytes-unicode conversion.
+- Issue #12818: format address no longer needlessly \ escapes ()s in names when
+ the name ends up being quoted.
-- Issue #9378: python -m pickle <pickle file> will now load and display the
- first object in the pickle file.
+- Issue #14062: BytesGenerator now correctly folds Header objects,
+ including using linesep when folding.
-- Issue #4770: Restrict binascii module to accept only bytes (as specified).
- And fix the email package to encode to ASCII instead of ``raw-unicode-escape``
- before ASCII-to-binary decoding.
+- Issue #13839: When invoked on the command-line, the pstats module now
+ accepts several filenames of profile stat files and merges them all.
+ Patch by Matt Joiner.
-- Issue #9384: ``python -m tkinter`` will now display a simple demo applet.
+- Issue #14291: Email now defaults to utf-8 for non-ASCII unicode headers
+ instead of raising an error. This fixes a regression relative to 2.7.
-- The default size of the re module's compiled regular expression cache has been
- increased from 100 to 500 and the cache replacement policy has changed from
- simply clearing the entire cache on overflow to forgetting the least recently
- used cached compiled regular expressions. This is a performance win for
- applications that use a lot of regular expressions and limits the impact of
- the performance hit anytime the cache is exceeded.
+- Issue #989712: Support using Tk without a mainloop.
-- Issue #7113: Speed up loading in configparser. Patch by Łukasz Langa.
+- Issue #5219: Prevent event handler cascade in IDLE.
-- Issue #9032: XML-RPC client retries the request on EPIPE error. The EPIPE
- error occurs when the server closes the socket and the client sends a big
- XML-RPC request.
+- Issue #3835: Refuse to use unthreaded Tcl in threaded Python.
-- Issue #4629: getopt raises an error if an argument ends with "=", whereas
- getopt doesn't accept a value (eg. --help= is rejected if getopt uses
- ['help='] long options).
+- Issue #2843: Add new Tk API to Tkinter.
-- Issue #7989: Added pure python implementation of the `datetime` module. The C
- module is renamed to `_datetime` and if available, overrides all classes
- defined in datetime with fast C impementation. Python implementation is based
- on the original python prototype for the datetime module by Tim Peters with
- minor modifications by the PyPy project. The test suite now tests `datetime`
- module with and without `_datetime` acceleration using the same test cases.
+- Issue #14184: Increase the default stack size for secondary threads on
+ Mac OS X to avoid interpreter crashes when using threads on 10.7.
-- Issue #7895: platform.mac_ver() no longer crashes after calling os.fork().
+- Issue #14180: datetime.date.fromtimestamp(),
+ datetime.datetime.fromtimestamp() and datetime.datetime.utcfromtimestamp()
+ now raise an OSError instead of ValueError if localtime() or gmtime() failed.
-- Issue #9323: Fixed a bug in trace.py that resulted in loosing the name of the
- script being traced. Patch by Eli Bendersky.
+- Issue #14180: time.ctime(), gmtime(), time.localtime(),
+ datetime.date.fromtimestamp(), datetime.datetime.fromtimestamp() and
+ datetime.datetime.utcfromtimestamp() now raises an OverflowError, instead of
+ a ValueError, if the timestamp does not fit in time_t.
-- Issue #9282: Fixed --listfuncs option of trace.py. Thanks Eli Bendersky for
- the patch.
+- Issue #14180: datetime.datetime.fromtimestamp() and
+ datetime.datetime.utcfromtimestamp() now round microseconds towards zero
+ instead of rounding to nearest with ties going away from zero.
-- Issue #3704: http.cookiejar was not properly handling URLs with a / in the
- parameters.
+- Issue #10543: Fix unittest test discovery with Jython bytecode files.
-- Issue #9268: ``pickletools.dis()`` now has an optional *annotate* argument
- which controls printing of opcode descriptions in ``dis()`` output.
+- Issue #1178863: Separate initialisation from setting when initializing
+ Tkinter.Variables; harmonize exceptions to ValueError; only delete variables
+ that have not been deleted; assert that variable names are strings.
-- Issue #1555570: email no longer inserts extra blank lines when a \r\n combo
- crosses an 8192 byte boundary.
+- Issue #14104: Implement time.monotonic() on Mac OS X, patch written by
+ Nicholas Riley.
-- Issue #9243: Fix sndhdr module and add unit tests, contributed by James Lee.
+- Issue #13394: the aifc module now uses warnings.warn() to signal warnings.
-- ``ast.literal_eval()`` now allows byte literals.
+- Issue #14252: Fix subprocess.Popen.terminate() to not raise an error under
+ Windows when the child process has already exited.
-- Issue #9137: Fix issue in MutableMapping.update, which incorrectly treated
- keyword arguments called 'self' or 'other' specially.
+- Issue #14223: curses.addch() is no more limited to the range 0-255 when the
+ Python curses is not linked to libncursesw. It was a regression introduced
+ in Python 3.3a1.
-- ``ast.literal_eval()`` now allows set literals.
+- Issue #14168: Check for presence of Element._attrs in minidom before
+ accessing it.
-- Issue #9164: Ensure that sysconfig handles duplicate -arch flags in CFLAGS.
+- Issue #12328: Fix multiprocessing's use of overlapped I/O on Windows.
+ Also, add a multiprocessing.connection.wait(rlist, timeout=None) function
+ for polling multiple objects at once. Patch by sbt.
-- Issue #7646: The fnmatch pattern cache no longer grows without bound.
+- Issue #14007: Accept incomplete TreeBuilder objects (missing start, end,
+ data or close method) for the Python implementation as well.
+ Drop the no-op TreeBuilder().xml() method from the C implementation.
-- Issue #9136: Fix 'dictionary changed size during iteration' RuntimeError
- produced when profiling the decimal module. This was due to a dangerous
- iteration over 'locals()' in Context.__init__.
+- Issue #14210: pdb now has tab-completion not only for command names, but
+ also for their arguments, wherever possible.
-- Fix extreme speed issue in Decimal.pow when the base is an exact power of 10
- and the exponent is tiny (for example, ``Decimal(10) **
- Decimal('1e-999999999')``).
+- Issue #14310: Sockets can now be with other processes on Windows using
+ the api socket.socket.share() and socket.fromshare().
-- Issue #9186: Fix math.log1p(-1.0) to raise ValueError, not OverflowError.
+- Issue #10576: The gc module now has a 'callbacks' member that will get
+ called when garbage collection takes place.
-- Issue #9130: Fix validation of relative imports in parser module.
+Build
+-----
-- Issue #9128: Fix validation of class decorators in parser module.
+- Issue #14557: Fix extensions build on HP-UX. Patch by Adi Roiban.
-- Issue #9094: python -m pickletools will now disassemble pickle files listed in
- the command line arguments. See output of python -m pickletools -h for more
- details.
+- Issue #14387: Do not include accu.h from Python.h.
-- Issue #5468: urlencode to handle bytes type and other encodings in its query
- parameter. Patch by Dan Mahn.
+- Issue #14359: Only use O_CLOEXEC in _posixmodule.c if it is defined.
+ Based on patch from Hervé Coatanhay.
-- Issue #7673: Fix security vulnerability (CVE-2010-2089) in the audioop module,
- ensure that the input string length is a multiple of the frame size.
+- Issue #14321: Do not run pgen during the build if files are up to date.
-- Issue #6507: Accept source strings in dis.dis(). Original patch by Daniel
- Urban.
+Documentation
+-------------
-- Issue #7829: Clearly document that the dis module is exposing an
- implementation detail that is not stable between Python VMs or releases.
+- Issue #14034: added the argparse tutorial.
-- Issue #6589: cleanup asyncore.socket_map in case smtpd.SMTPServer constructor
- raises an exception.
+- Issue #14324: Fix configure tests for cross builds.
-- Issue #9110: Addition of ContextDecorator to contextlib, for creating APIs
- that act as both context managers and decorators. contextmanager changes to
- use ContextDecorator.
+- Issue #14327: Call AC_CANONICAL_HOST in configure.ac and check in
+ config.{guess,sub}. Don't use uname calls for cross builds.
-- Implement importlib.abc.SourceLoader and deprecate PyLoader and PyPycLoader
- for removal in Python 3.4.
+Extension Modules
+-----------------
-- Issue #9064: pdb's "up" and "down" commands now accept an optional argument
- giving the number of frames to go.
+- Issue #9041: An issue in ctypes.c_longdouble, ctypes.c_double, and
+ ctypes.c_float that caused an incorrect exception to be returned in the
+ case of overflow has been fixed.
-- Issue #9018: os.path.normcase() now raises a TypeError if the argument is not
- ``str`` or ``bytes``.
+- Issue #14212: The re module didn't retain a reference to buffers it was
+ scanning, resulting in segfaults.
-- Issue #9075: In the ssl module, remove the setting of a ``debug`` flag on an
- OpenSSL structure.
+- Issue #14259: The finditer() method of re objects did not take any
+ keyword arguments, contrary to the documentation.
-- Issue #8682: The ssl module now temporary increments the reference count of a
- socket object got through ``PyWeakref_GetObject``, so as to avoid possible
- deallocation while the object is still being used.
+- Issue #10142: Support for SEEK_HOLE/SEEK_DATA (for example, under ZFS).
-- Issue #1368368: FancyURLOpener class changed to throw an Exception on wrong
- password instead of presenting an interactive prompt. Older behavior can be
- obtained by passing retry=True to http_error_xxx methods of FancyURLOpener.
+Tests
+-----
-- Issue #8720: Fix regression caused by fix for #4050 by making getsourcefile
- smart enough to find source files in the linecache.
+- Issue #14442: Add missing errno import in test_smtplib.
-- Issue #5610: feedparser no longer eats extra characters at the end of a body
- part if the body part ends with a ``\r\n``.
+- Issue #8315: (partial fix) python -m unittest test.test_email now works.
-- Issue #8986: math.erfc was incorrectly raising OverflowError for values
- between -27.3 and -30.0 on some platforms.
-- Issue #8784: Set tarfile default encoding to 'utf-8' on Windows.
+What's New in Python 3.3.0 Alpha 1?
+===================================
-- Issue #8966: If a ctypes structure field is an array of c_char, convert its
- value to bytes instead of str (as done for c_char and c_char_p).
+*Release date: 05-Mar-2012*
-- Issue #8188: Comparisons between Decimal and Fraction objects are now
- permitted, returning a result based on the exact numerical values of the
- operands. This builds on issue #2531, which allowed Decimal-to-float
- comparisons; all comparisons involving numeric types (bool, int, float,
- complex, Decimal, Fraction) should now act as expected.
+Core and Builtins
+-----------------
-- Issue #8897: Fix sunau module, use bytes to write the header. Patch written by
- Thomas Jollans.
+- Issue #14172: Fix reference leak when marshalling a buffer-like object
+ (other than a bytes object).
-- Issue #8899: time.struct_time now has class and attribute docstrings.
+- Issue #13521: dict.setdefault() now does only one lookup for the given key,
+ making it "atomic" for many purposes. Patch by Filip Gruszczyński.
-- Issue #6470: Drop UNC prefix in FixTk.
+- PEP 409, Issue #6210: "raise X from None" is now supported as a means of
+ suppressing the display of the chained exception context. The chained
+ context still remains available as the __context__ attribute.
-- Issue #4768: base64 encoded email body parts were incorrectly stored as binary
- strings. They are now correctly converted to strings.
+- Issue #10181: New memoryview implementation fixes multiple ownership
+ and lifetime issues of dynamically allocated Py_buffer members (#9990)
+ as well as crashes (#8305, #7433). Many new features have been added
+ (See whatsnew/3.3), and the documentation has been updated extensively.
+ The ndarray test object from _testbuffer.c implements all aspects of
+ PEP-3118, so further development towards the complete implementation
+ of the PEP can proceed in a test-driven manner.
-- Issue #8833: tarfile created hard link entries with a size field != 0 by
- mistake.
+ Thanks to Nick Coghlan, Antoine Pitrou and Pauli Virtanen for review
+ and many ideas.
-- Charset.body_encode now correctly handles base64 encoding by encoding with the
- output_charset before calling base64mime.encode. Passes the tests from 2.x
- issue #1368247.
+- Issue #12834: Fix incorrect results of memoryview.tobytes() for
+ non-contiguous arrays.
-- Issue #8845: sqlite3 Connection objects now have a read-only in_transaction
- attribute that is True iff there are uncommitted changes.
+- Issue #5231: Introduce memoryview.cast() method that allows changing
+ format and shape without making a copy of the underlying memory.
-- Issue #1289118: datetime.timedelta objects can now be multiplied by float and
- divided by float and int objects. Results are rounded to the nearest multiple
- of timedelta.resolution with ties resolved using round-half-to-even method.
+- Issue #14084: Fix a file descriptor leak when importing a module with a
+ bad encoding.
-- Issue #7150: Raise OverflowError if the result of adding or subtracting
- timedelta from date or datetime falls outside of the MINYEAR:MAXYEAR range.
+- Upgrade Unicode data to Unicode 6.1.
-- Issue #8806: add SSL contexts support to ftplib.
+- Issue #14040: Remove rarely used file name suffixes for C extensions
+ (under POSIX mainly).
-- Issue #4769: Fix main() function of the base64 module, use sys.stdin.buffer
- and sys.stdout.buffer (instead of sys.stdin and sys.stdout) to use the bytes
- API.
+- Issue #14051: Allow arbitrary attributes to be set of classmethod and
+ staticmethod.
-- Issue #8770: Now sysconfig displays information when it's called as a script.
- Initial idea by Sridhar Ratnakumar.
+- Issue #13703: oCERT-2011-003: Randomize hashes of str and bytes to protect
+ against denial of service attacks due to hash collisions within the dict and
+ set types. Patch by David Malcolm, based on work by Victor Stinner.
-- Issue #6662: Fix parsing of malformatted charref (&#bad;), patch written by
- Fredrik Håård.
+- Issue #13020: Fix a reference leak when allocating a structsequence object
+ fails. Patch by Suman Saha.
-- Issue #8540: Decimal module: rename the Context._clamp attribute to
- Context.clamp and make it public. This is useful in creating contexts that
- correspond to the decimal interchange formats specified in IEEE 754.
+- Issue #13908: Ready types returned from PyType_FromSpec.
-- Issue #6268: Fix seek() method of codecs.open(), don't read or write the BOM
- twice after seek(0). Fix also reset() method of codecs, UTF-16, UTF-32 and
- StreamWriter classes.
+- Issue #11235: Fix OverflowError when trying to import a source file whose
+ modification time doesn't fit in a 32-bit timestamp.
-- Issue #3798: sys.exit(message) writes the message to sys.stderr file, instead
- of the C file stderr, to use stderr encoding and error handler.
+- Issue #12705: A SyntaxError exception is now raised when attempting to
+ compile multiple statements as a single interactive statement.
-- Issue #8782: Add a trailing newline in linecache.updatecache to the last line
- of files without one.
+- Fix the builtin module initialization code to store the init function for
+ future reinitialization.
-- Issue #8729: Return NotImplemented from collections.Mapping.__eq__ when
- comparing to a non-mapping.
+- Issue #8052: The posix subprocess module would take a long time closing
+ all possible file descriptors in the child process rather than just open
+ file descriptors. It now closes only the open fds if possible for the
+ default close_fds=True behavior.
-- Issue #8774: tabnanny uses the encoding cookie (#coding:...) to use the
- correct encoding.
+- Issue #13629: Renumber the tokens in token.h so that they match the indexes
+ into _PyParser_TokenNames.
-- Issue #4870: Add an `options` attribute to SSL contexts, as well as several
- ``OP_*`` constants to the `ssl` module. This allows to selectively disable
- protocol versions, when used in combination with `PROTOCOL_SSLv23`.
+- Issue #13752: Add a casefold() method to str.
-- Issue #8759: Fixed user paths in sysconfig for posix and os2 schemes.
+- Issue #13761: Add a "flush" keyword argument to the print() function,
+ used to ensure flushing the output stream.
-- Issue #8663: distutils.log emulates backslashreplace error handler. Fix
- compilation in a non-ASCII directory if stdout encoding is ASCII (eg. if
- stdout is not a TTY).
+- Issue #13645: pyc files now contain the size of the corresponding source
+ code, to avoid timestamp collisions (especially on filesystems with a low
+ timestamp resolution) when checking for freshness of the bytecode.
-- Issue #8513: os.get_exec_path() supports b'PATH' key and bytes value.
- subprocess.Popen() and os._execvpe() support bytes program name. Add
- os.supports_bytes_environ flag: True if the native OS type of the environment
- is bytes (eg. False on Windows).
+- PEP 380, Issue #11682: Add "yield from <x>" to support easy delegation to
+ subgenerators (initial patch by Greg Ewing, integration into 3.3 by
+ Renaud Blanch, Ryan Kelly, Zbigniew Jędrzejewski-Szmek and Nick Coghlan)
-- Issue #8633: tarfile is now able to read and write archives with "raw" binary
- pax headers as described in POSIX.1-2008.
+- Issue #13748: Raw bytes literals can now be written with the ``rb`` prefix
+ as well as ``br``.
-- Issue #1285086: Speed up urllib.parse functions: quote, quote_from_bytes,
- unquote, unquote_to_bytes.
+- Issue #12736: Use full unicode case mappings for upper, lower, and title case.
-- Issue #8688: Distutils now recalculates MANIFEST everytime.
+- Issue #12760: Add a create mode to open(). Patch by David Townshend.
-- Issue #8477: ssl.RAND_egd() and ssl._test_decode_cert() support str with
- surrogates and bytes for the filename.
+- Issue #13738: Simplify implementation of bytes.lower() and bytes.upper().
-- Issue #8550: Add first class ``SSLContext`` objects to the ssl module.
+- Issue #13577: Built-in methods and functions now have a __qualname__.
+ Patch by sbt.
-- Issue #8681: Make the zlib module's error messages more informative when the
- zlib itself doesn't give any detailed explanation.
+- Issue #6695: Full garbage collection runs now clear the freelist of set
+ objects. Initial patch by Matthias Troffaes.
-- The audioop module now supports sound fragments of length greater than 2**31
- bytes on 64-bit machines, and is PY_SSIZE_T_CLEAN.
+- Fix OSError.__init__ and OSError.__new__ so that each of them can be
+ overriden and take additional arguments (followup to issue #12555).
-- Issue #4972: Add support for the context manager protocol to the ftplib.FTP
- class.
+- Fix the fix for issue #12149: it was incorrect, although it had the side
+ effect of appearing to resolve the issue. Thanks to Mark Shannon for
+ noticing.
-- Issue #8664: In py_compile, create __pycache__ when the compiled path is
- given.
+- Issue #13505: Pickle bytes objects in a way that is compatible with
+ Python 2 when using protocols <= 2.
-- Issue #8514: Add os.fsencode() function (Unix only): encode a string to bytes
- for use in the file system, environment variables or the command line.
+- Issue #11147: Fix an unused argument in _Py_ANNOTATE_MEMORY_ORDER. (Fix
+ given by Campbell Barton).
-- Issue #8571: Fix an internal error when compressing or decompressing a chunk
- larger than 1GB with the zlib module's compressor and decompressor objects.
+- Issue #13503: Use a more efficient reduction format for bytearrays with
+ pickle protocol >= 3. The old reduction format is kept with older protocols
+ in order to allow unpickling under Python 2. Patch by Irmen de Jong.
-- Issue #8603: Support bytes environmental variables on Unix: Add os.environb
- mapping and os.getenvb() function. os.unsetenv() encodes str argument to the
- file system encoding with the surrogateescape error handler (instead of
- utf8/strict) and accepts bytes. posix.environ keys and values are now bytes.
+- Issue #7111: Python can now be run without a stdin, stdout or stderr
+ stream. It was already the case with Python 2. However, the corresponding
+ sys module entries are now set to None (instead of an unusable file object).
-- Issue #8573: asyncore _strerror() function might throw ValueError.
+- Issue #11849: Ensure that free()d memory arenas are really released
+ on POSIX systems supporting anonymous memory mappings. Patch by
+ Charles-François Natali.
-- Issue #8483: asyncore.dispatcher's __getattr__ method produced confusing error
- messages when accessing undefined class attributes because of the cheap
- inheritance with the underlying socket object. The cheap inheritance has been
- deprecated.
+- Issue #13452: PyUnicode_EncodeDecimal() doesn't support error handlers
+ different than "strict" anymore. The caller was unable to compute the
+ size of the output buffer: it depends on the error handler.
-- Issue #4265: shutil.copyfile() was leaking file descriptors when disk fills.
- Patch by Tres Seaver.
+- PEP 3155 / issue #13448: Qualified name for classes and functions.
-- Issue #8390: tarfile uses surrogateescape as the default error handler
- (instead of replace in read mode or strict in write mode).
+- Issue #13436: Fix a bogus error message when an AST object was passed
+ an invalid integer value.
-- Issue #7755: Use an unencumbered audio file for tests.
+- Issue #13411: memoryview objects are now hashable when the underlying
+ object is hashable.
-- Issue #8621: uuid.uuid4() returned the same sequence of values in the parent
- and any children created using ``os.fork`` on MacOS X 10.6.
+- Issue #13338: Handle all enumerations in _Py_ANNOTATE_MEMORY_ORDER
+ to allow compiling extension modules with -Wswitch-enum on gcc.
+ Initial patch by Floris Bruynooghe.
-- Issue #8567: Fix precedence of signals in Decimal module: when a Decimal
- operation raises multiple signals and more than one of those signals is
- trapped, the specification determines the order in which the signals should be
- handled. In many cases this order wasn't being followed, leading to the wrong
- Python exception being raised.
+- Issue #10227: Add an allocation cache for a single slice object. Patch by
+ Stefan Behnel.
-- Issue #7865: The close() method of :mod:`io` objects should not swallow
- exceptions raised by the implicit flush(). Also qensure that calling close()
- several times is supported. Patch by Pascal Chambon.
+- Issue #13393: BufferedReader.read1() now asks the full requested size to
+ the raw stream instead of limiting itself to the buffer size.
-- Issue #4687: Fix accuracy of garbage collection runtimes displayed with
- gc.DEBUG_STATS.
+- Issue #13392: Writing a pyc file should now be atomic under Windows as well.
-- Issue #8354: The siginterrupt setting is now preserved for all signals, not
- just SIGCHLD.
+- Issue #13333: The UTF-7 decoder now accepts lone surrogates (the encoder
+ already accepts them).
-- Issue #7192: webbrowser.get("firefox") now works on Mac OS X, as does
- webbrowser.get("safari").
+- Issue #13389: Full garbage collection passes now clear the freelists for
+ list and dict objects. They already cleared other freelists in the
+ interpreter.
-- Issue #8464: tarfile no longer creates files with execute permissions set when
- mode="w|" is used.
+- Issue #13327: Remove the need for an explicit None as the second argument
+ to os.utime, os.lutimes, os.futimes, os.futimens, os.futimesat, in
+ order to update to the current time. Also added keyword argument
+ handling to os.utimensat in order to remove the need for explicit None.
-- Issue #7834: Fix connect() of Bluetooth L2CAP sockets with recent versions of
- the Linux kernel. Patch by Yaniv Aknin.
+- Issue #13350: Simplify some C code by replacing most usages of
+ PyUnicode_Format by PyUnicode_FromFormat.
-- Issue #8295: Added shutil.unpack_archive.
+- Issue #13342: input() used to ignore sys.stdin's and sys.stdout's unicode
+ error handler in interactive mode (when calling into PyOS_Readline()).
-- Issue #6312: Fixed http HEAD request when the transfer encoding is chunked.
- It should correctly return an empty response now.
+- Issue #9896: Add start, stop, and step attributes to range objects.
-- Issue #8546: Reject None given as the buffering argument to _pyio.open.
+- Issue #13343: Fix a SystemError when a lambda expression uses a global
+ variable in the default value of a keyword-only argument: ``lambda *,
+ arg=GLOBAL_NAME: None``
-- Issue #8549: Fix compiling the _ssl extension under AIX. Patch by
- Sridhar Ratnakumar.
+- Issue #12797: Added custom opener parameter to builtin open() and
+ FileIO.open().
-- Issue #6656: fix locale.format_string to handle escaped percents
- and mappings.
+- Issue #10519: Avoid unnecessary recursive function calls in
+ setobject.c.
-- Issue #2302: Fix a race condition in SocketServer.BaseServer.shutdown, where
- the method could block indefinitely if called just before the event loop
- started running. This also fixes the occasional freezes witnessed in
- test_httpservers.
+- Issue #10363: Deallocate global locks in Py_Finalize().
-- Issue #8524: When creating an SSL socket, the timeout value of the original
- socket wasn't retained (instead, a socket with a positive timeout would be
- turned into a non-blocking SSL socket).
+- Issue #13018: Fix reference leaks in error paths in dictobject.c.
+ Patch by Suman Saha.
-- Issue #5103: SSL handshake would ignore the socket timeout and block
- indefinitely if the other end didn't respond.
+- Issue #13201: Define '==' and '!=' to compare range objects based on
+ the sequence of values they define (instead of comparing based on
+ object identity).
-- The do_handshake() method of SSL objects now adjusts the blocking mode of the
- SSL structure if necessary (as other methods already do).
+- Issue #1294232: In a few cases involving metaclass inheritance, the
+ interpreter would sometimes invoke the wrong metaclass when building a new
+ class object. These cases now behave correctly. Patch by Daniel Urban.
-- Issue #8391: os.execvpe() and os.getenv() supports unicode with surrogates and
- bytes strings for environment keys and values.
+- Issue #12753: Add support for Unicode name aliases and named sequences.
+ Both ``unicodedata.lookup()`` and '\N{...}' now resolve aliases,
+ and ``unicodedata.lookup()`` resolves named sequences too.
-- Issue #8467: Pure Python implementation of subprocess encodes the error
- message using surrogatepass error handler to support surrogates in the
- message.
+- Issue #12170: The count(), find(), rfind(), index() and rindex() methods
+ of bytes and bytearray objects now accept an integer between 0 and 255
+ as their first argument. Patch by Petri Lehtinen.
-- Issue #8468: bz2.BZ2File() accepts str with surrogates and bytes filenames.
+- Issue #12604: VTRACE macro expanded to no-op in _sre.c to avoid compiler
+ warnings. Patch by Josh Triplett and Petri Lehtinen.
-- Issue #8451: Syslog module now uses basename(sys.argv[0]) instead of the
- string "python" as the *ident*. openlog() arguments are all optional and
- keywords.
+- Issue #12281: Rewrite the MBCS codec to handle correctly replace and ignore
+ error handlers on all Windows versions. The MBCS codec is now supporting all
+ error handlers, instead of only replace to encode and ignore to decode.
-- Issue #8108: Fix the unwrap() method of SSL objects when the socket has a
- non-infinite timeout. Also make that method friendlier with applications
- wanting to continue using the socket in clear-text mode, by disabling
- OpenSSL's internal readahead. Thanks to Darryl Miles for guidance.
+- Issue #13188: When called without an explicit traceback argument,
+ generator.throw() now gets the traceback from the passed exception's
+ ``__traceback__`` attribute. Patch by Petri Lehtinen.
-- Issue #8496: make mailcap.lookup() always return a list, rather than an
- iterator. Patch by Gregory Nofi.
+- Issue #13146: Writing a pyc file is now atomic under POSIX.
-- Issue #8195: Fix a crash in sqlite Connection.create_collation() if the
- collation name contains a surrogate character.
+- Issue #7833: Extension modules built using distutils on Windows will no
+ longer include a "manifest" to prevent them failing at import time in some
+ embedded situations.
-- Issue #8484: Load all ciphers and digest algorithms when initializing the _ssl
- extension, such that verification of some SSL certificates doesn't fail
- because of an "unknown algorithm".
+- PEP 3151 / issue #12555: reworking the OS and IO exception hierarchy.
-- Issue #6547: Added the ignore_dangling_symlinks option to shutil.copytree.
+- Issue #13560: Add PyUnicode_DecodeLocale(), PyUnicode_DecodeLocaleAndSize()
+ and PyUnicode_EncodeLocale() functions to the C API to decode/encode from/to
+ the current locale encoding.
-- Issue #1540112: Now allowing the choice of a copy function in shutil.copytree.
+- Add internal API for static strings (_Py_identifier et al.).
-- Issue #4814: timeout parameter is now applied also for connections resulting
- from PORT/EPRT commands.
+- Issue #13063: the Windows error ERROR_NO_DATA (numbered 232 and described
+ as "The pipe is being closed") is now mapped to POSIX errno EPIPE
+ (previously EINVAL).
-- Issue #8463: added missing reference to bztar in shutil's documentation.
+- Issue #12911: Fix memory consumption when calculating the repr() of huge
+ tuples or lists.
-- Issue #7154: urllib.request can now detect the proxy settings on OSX 10.6 (as
- long as the user didn't specify 'automatic proxy configuration').
+- PEP 393: flexible string representation. Thanks to Torsten Becker for the
+ initial implementation, and Victor Stinner for various bug fixes.
-- Issue #3817: ftplib.FTP.abort() method now considers 225 a valid response code
- as stated in RFC-959 at chapter 5.4.
+- Issue #14081: The 'sep' and 'maxsplit' parameter to str.split, bytes.split,
+ and bytearray.split may now be passed as keyword arguments.
-- Issue #8394: _ctypes.dlopen() accepts bytes, bytearray and str with
- surrogates.
+- Issue #13012: The 'keepends' parameter to str.splitlines may now be passed
+ as a keyword argument: "my_string.splitlines(keepends=True)". The same
+ change also applies to bytes.splitlines and bytearray.splitlines.
-- Issue #850728: Add a *timeout* parameter to the `acquire()` method of
- `threading.Semaphore` objects. Original patch by Torsten Landschoff.
+- Issue #7732: Don't open a directory as a file anymore while importing a
+ module. Ignore the direcotry if its name matchs the module name (e.g.
+ "__init__.py") and raise a ImportError instead.
-- Issue #8322: Add a *ciphers* argument to SSL sockets, so as to change the
- available cipher list. Helps fix test_ssl with OpenSSL 1.0.0.
+- Issue #13021: Missing decref on an error path. Thanks to Suman Saha for
+ finding the bug and providing a patch.
-- Issue #8393: subprocess accepts bytes, bytearray and str with surrogates for
- the current working directory.
+- Issue #12973: Fix overflow checks that relied on undefined behaviour in
+ list_repeat (listobject.c) and islice_next (itertoolsmodule.c). These bugs
+ caused test failures with recent versions of Clang.
-- Issue #7606: XML-RPC traceback stored in X-traceback is now encoded to ASCII
- using backslashreplace error handler.
+- Issue #12904: os.utime, os.futimes, os.lutimes, and os.futimesat now write
+ atime and mtime with nanosecond precision on modern POSIX platforms.
-- Issue #8412: os.system() now accepts bytes, bytearray and str with surrogates.
+- Issue #12802: the Windows error ERROR_DIRECTORY (numbered 267) is now
+ mapped to POSIX errno ENOTDIR (previously EINVAL).
-- Issue #2987: RFC2732 support for urlparse (IPv6 addresses). Patch by Tony
- Locke and Hans Ulrich Niedermann.
+- Issue #9200: The str.is* methods now work with strings that contain non-BMP
+ characters even in narrow Unicode builds.
-- Issue #5277: Fix quote counting when parsing RFC 2231 encoded parameters.
+- Issue #12791: Break reference cycles early when a generator exits with
+ an exception.
-- Issue #7316: The acquire() method of lock objects in the :mod:`threading`
- module now takes an optional timeout argument in seconds. Timeout support
- relies on the system threading library, so as to avoid a semi-busy wait loop.
+- Issue #12773: Make __doc__ mutable on user-defined classes.
-- Issue #8383: pickle and pickletools use surrogatepass error handler when
- encoding unicode as utf8 to support lone surrogates and stay compatible with
- Python 2.x and 3.x.
+- Issue #12766: Raise a ValueError when creating a class with a class variable
+ that conflicts with a name in __slots__.
-- Issue #7585: difflib context and unified diffs now place a tab between
- filename and date, conforming to the 'standards' they were originally designed
- to follow. This improves compatibility with patch tools.
+- Issue #12266: Fix str.capitalize() to correctly uppercase/lowercase
+ titlecased and cased non-letter characters.
-- Issue #7472: Fixed typo in email.encoders module; messages using ISO-2022
- character sets will now consistently use a Content-Transfer-Encoding of 7bit
- rather than sometimes being marked as 8bit.
+- Issue #12732: In narrow unicode builds, allow Unicode identifiers which fall
+ outside the BMP.
-- Issue #8375: test_distutils now checks if the temporary directory are still
- present before it cleans them.
+- Issue #12575: Validate user-generated AST before it is compiled.
-- Issue #8374: Update the internal alias table in the :mod:`locale` module to
- cover recent locale changes and additions.
+- Make type(None), type(Ellipsis), and type(NotImplemented) callable. They
+ return the respective singleton instances.
-- Issue #8321: Give access to OpenSSL version numbers from the `ssl` module,
- using the new attributes `ssl.OPENSSL_VERSION`, `ssl.OPENSSL_VERSION_INFO` and
- `ssl.OPENSSL_VERSION_NUMBER`.
+- Forbid summing bytes with sum().
-- Add functools.total_ordering() and functools.cmp_to_key().
+- Verify the types of AST strings and identifiers provided by the user before
+ compiling them.
-- Issue #8257: The Decimal construct now accepts a float instance directly,
- converting that float to a Decimal of equal value:
+- Issue #12647: The None object now has a __bool__() method that returns False.
+ Formerly, bool(None) returned False only because of special case logic
+ in PyObject_IsTrue().
- >>> Decimal(1.1)
- Decimal('1.100000000000000088817841970012523233890533447265625')
+- Issue #12579: str.format_map() now raises a ValueError if used on a
+ format string that contains positional fields. Initial patch by
+ Julian Berman.
-- Issue #8294: The Fraction constructor now accepts Decimal and float instances
- directly.
+- Issue #10271: Allow warnings.showwarning() be any callable.
-- Issue #7279: Comparisons involving a Decimal signaling NaN now signal
- InvalidOperation instead of returning False. (Comparisons involving a quiet
- NaN are unchanged.) Also, Decimal quiet NaNs are now hashable; Decimal
- signaling NaNs remain unhashable.
+- Issue #11627: Fix segfault when __new__ on a exception returns a
+ non-exception class.
-- Issue #2531: Comparison operations between floats and Decimal instances now
- return a result based on the numeric values of the operands; previously they
- returned an arbitrary result based on the relative ordering of id(float) and
- id(Decimal). See also issue #8188, which adds Decimal-to-Fraction
- comparisons.
+- Issue #12149: Update the method cache after a type's dictionary gets
+ cleared by the garbage collector. This fixes a segfault when an instance
+ and its type get caught in a reference cycle, and the instance's
+ deallocator calls one of the methods on the type (e.g. when subclassing
+ IOBase). Diagnosis and patch by Davide Rizzo.
-- Added a subtract() method to collections.Counter().
+- Issue #9611, #9015: FileIO.read() clamps the length to INT_MAX on Windows.
-- Issue #8233: When run as a script, py_compile.py optionally takes a single
- argument `-` which tells it to read files to compile from stdin. Each line is
- read on demand and the named file is compiled immediately. (Original patch by
- Piotr Ożarowski).
+- Issue #9642: Uniformize the tests on the availability of the mbcs codec, add
+ a new HAVE_MBCS define.
-- Backwards incompatible change: Unicode codepoints line tabulation (0x0B) and
- form feed (0x0C) are now considered linebreaks, as specified in Unicode
- Standard Annex #14. See issue #7643. http://www.unicode.org/reports/tr14/
+- Issue #9642: Fix filesystem encoding initialization: use the ANSI code page
+ on Windows if the mbcs codec is not available, and fail with a fatal error if
+ we cannot get the locale encoding (if nl_langinfo(CODESET) is not available)
+ instead of using UTF-8.
-- Comparisons using one of <, <=, >, >= between a complex instance and a
- Fractions instance now raise TypeError instead of returning True/False. This
- makes Fraction <=> complex comparisons consistent with int <=> complex, float
- <=> complex, and complex <=> complex comparisons.
+- When a generator yields, do not retain the caller's exception state on the
+ generator.
-- Issue #8139: ossaudiodev didn't initialize its types properly, therefore some
- methods (such as oss_mixer_device.fileno()) were not available. Initial patch
- by Bertrand Janin.
+- Issue #12475: Prevent generators from leaking their exception state into the
+ caller's frame as they return for the last time.
-- Issue #8205: Remove the "Modules" directory from sys.path when Python is
- running from the build directory (POSIX only).
+- Issue #12291: You can now load multiple marshalled objects from a stream,
+ with other data interleaved between marshalled objects.
-- Issue #7512: shutil.copystat() could raise an OSError when the filesystem
- didn't support chflags() (for example ZFS under FreeBSD). The error is now
- silenced.
+- Issue #12356: When required positional or keyword-only arguments are not
+ given, produce a informative error message which includes the name(s) of the
+ missing arguments.
-- Issue #7860: platform.uname now reports the correct 'machine' type when Python
- is running in WOW64 mode on 64 bit Windows.
+- Issue #12370: Fix super with no arguments when __class__ is overriden in the
+ class body.
-- Issue #3890, #8222: Fix recv() and recv_into() on non-blocking SSL sockets.
- Also, enable the SSL_MODE_AUTO_RETRY flag on SSL sockets, so that blocking
- reads and writes are always retried by OpenSSL itself.
+- Issue #12084: os.stat on Windows now works properly with relative symbolic
+ links when called from any directory.
-- Issue #4282: Fix the main function of the profile module for a non-ASCII
- script, open the file in binary mode and not in text mode with the default
- (utf8) encoding.
+- Loosen type restrictions on the __dir__ method. __dir__ can now return any
+ sequence, which will be converted to a list and sorted by dir().
-- Issue #8179: Fix macpath.realpath() on a non-existing path.
+- Issue #12265: Make error messages produced by passing an invalid set of
+ arguments to a function more informative.
-- Issue #8024: Update the Unicode database to 5.2.
+- Issue #12225: Still allow Python to build if Python is not in its hg repo or
+ mercurial is not installed.
-- Issue #8168: py_compile now handles files with utf-8 BOMS.
+- Issue #1195: my_fgets() now always clears errors before calling fgets(). Fix
+ the following case: sys.stdin.read() stopped with CTRL+d (end of file),
+ raw_input() interrupted by CTRL+c.
-- ``tokenize.detect_encoding`` now returns ``'utf-8-sig'`` when a UTF-8 BOM is
- detected.
+- Issue #12216: Allow unexpected EOF errors to happen on any line of the file.
-- Issue #6716/2: Backslash-replace error output in compilall.
+- Issue #12199: The TryExcept and TryFinally and AST nodes have been unified
+ into a Try node.
-- Issue #4961: Inconsistent/wrong result of askyesno function in tkMessageBox
- with Tcl/Tk-8.5.
+- Issue #9670: Increase the default stack size for secondary threads on
+ Mac OS X and FreeBSD to reduce the chances of a crash instead of a
+ "maximum recursion depth" RuntimeError exception.
+ (patch by Ronald Oussoren)
-- Issue #8140: extend compileall to compile single files. Add -i option.
+- Issue #12106: The use of the multiple-with shorthand syntax is now reflected
+ in the AST.
-- Issue #7356: ctypes.util: Make parsing of ldconfig output independent of the
- locale.
+- Issue #12190: Try to use the same filename object when compiling unmarshalling
+ a code objects in the same file.
-- The internals of the subprocess module on POSIX systems have been replaced by
- an extension module (_posixsubprocess) so that the fork()+exec() can be done
- safely without the possibility of deadlock in multithreaded applications.
+- Issue #12166: Move implementations of dir() specialized for various types into
+ the __dir__() methods of those types.
-- subprocess.Popen now has restore_signals and start_new_session features. The
- default of restore_signals=True is a new behavior compared to earlier Python
- versions. This means that signals such as SIGPIPE are not ignored by default
- in subprocesses launched by Python (Issue #1652).
+- Issue #5715: In socketserver, close the server socket in the child process.
-- Issue #6472: The xml.etree package is updated to ElementTree 1.3. The
- cElementTree module is updated too.
+- Correct lookup of __dir__ on objects. Among other things, this causes errors
+ besides AttributeError found on lookup to be propagated.
-- Issue #7774: Set sys.executable to an empty string if argv[0] has been set to
- an non existent program name and Python is unable to retrieve the real program
- name.
+- Issue #12060: Use sig_atomic_t type and volatile keyword in the signal
+ module. Patch written by Charles-François Natali.
-- Issue #7880: Fix sysconfig when the python executable is a symbolic link.
+- Issue #1746656: Added the if_nameindex, if_indextoname, if_nametoindex
+ methods to the socket module.
-- Issue #6509: fix re.sub to work properly when the pattern, the string, and the
- replacement were all bytes. Patch by Antoine Pitrou.
+- Issue #12044: Fixed subprocess.Popen when used as a context manager to
+ wait for the process to end when exiting the context to avoid unintentionally
+ leaving zombie processes around.
-- The sqlite3 module was updated to pysqlite 2.6.0. This fixes several obscure
- bugs and allows loading SQLite extensions from shared libraries.
+- Issue #1195: Fix input() if it is interrupted by CTRL+d and then CTRL+c,
+ clear the end-of-file indicator after CTRL+d.
-- Issue #1054943: Fix ``unicodedata.normalize('NFC', text)`` for the Public
- Review Issue #29 (http://unicode.org/review/pr-29.html).
+- Issue #1856: Avoid crashes and lockups when daemon threads run while the
+ interpreter is shutting down; instead, these threads are now killed when
+ they try to take the GIL.
-- Issue #7494: fix a crash in _lsprof (cProfile) after clearing the profiler,
- reset also the pointer to the current pointer context.
+- Issue #9756: When calling a method descriptor or a slot wrapper descriptor,
+ the check of the object type doesn't read the __class__ attribute anymore.
+ Fix a crash if a class override its __class__ attribute (e.g. a proxy of the
+ str type). Patch written by Andreas Stührk.
-- Issue #7232: Add support for the context manager protocol to the TarFile
- class.
+- Issue #10517: After fork(), reinitialize the TLS used by the PyGILState_*
+ APIs, to avoid a crash with the pthread implementation in RHEL 5. Patch
+ by Charles-François Natali.
-- Issue #7250: Fix info leak of os.environ across multi-run uses of
- wsgiref.handlers.CGIHandler.
+- Issue #10914: Initialize correctly the filesystem codec when creating a new
+ subinterpreter to fix a bootstrap issue with codecs implemented in Python, as
+ the ISO-8859-15 codec.
-- Issue #1729305: Fix doctest to handle encode error with "backslashreplace".
+- Issue #11918: OS/2 and VMS are no more supported because of the lack of
+ maintainer.
-- Issue #691291: codecs.open() should not convert end of lines on reading and
- writing.
+- Issue #6780: fix starts/endswith error message to mention that tuples are
+ accepted too.
-- Issue #7869: logging: improved diagnostic for format-time errors.
+- Issue #5057: fix a bug in the peepholer that led to non-portable pyc files
+ between narrow and wide builds while optimizing BINARY_SUBSCR on non-BMP
+ chars (e.g. "\U00012345"[0]).
-- Issue #7868: logging: added loggerClass attribute to Manager.
+- Issue #11845: Fix typo in rangeobject.c that caused a crash in
+ compute_slice_indices. Patch by Daniel Urban.
-- logging: Implemented PEP 391.
+- Issue #5673: Added a `timeout` keyword argument to subprocess.Popen.wait,
+ subprocess.Popen.communicated, subprocess.call, subprocess.check_call, and
+ subprocess.check_output. If the blocking operation takes more than `timeout`
+ seconds, the `subprocess.TimeoutExpired` exception is raised.
-- Issue #1537721: Add a writeheader() method to csv.DictWriter.
+- Issue #11650: PyOS_StdioReadline() retries fgets() if it was interrupted
+ (EINTR), for example if the program is stopped with CTRL+z on Mac OS X. Patch
+ written by Charles-Francois Natali.
-- Issue #7959: ctypes callback functions are now registered correctly with the
- cycle garbage collector.
+- Issue #9319: Include the filename in "Non-UTF8 code ..." syntax error.
-- Issue #5801: removed spurious empty lines in wsgiref.
+- Issue #10785: Store the filename as Unicode in the Python parser.
-- Issue #6666: fix bug in trace.py that applied the list of directories to be
- ignored only to the first file. Noted by Bogdan Opanchuk.
+- Issue #11619: _PyImport_LoadDynamicModule() doesn't encode the path to bytes
+ on Windows.
-- Issue #7597: curses.use_env() can now be called before initscr(). Noted by
- Kan-Ru Chen.
+- Issue #10998: Remove mentions of -Q, sys.flags.division_warning and
+ Py_DivisionWarningFlag left over from Python 2.
-- Issue #7310: fix the __repr__ of os.environ to show the environment variables.
+- Issue #11244: Remove an unnecessary peepholer check that was preventing
+ negative zeros from being constant-folded properly.
-- Issue #7970: email.Generator.flatten now correctly flattens message/rfc822
- messages parsed by email.Parser.HeaderParser.
+- Issue #11395: io.FileIO().write() clamps the data length to 32,767 bytes on
+ Windows if the file is a TTY to workaround a Windows bug. The Windows console
+ returns an error (12: not enough space error) on writing into stdout if
+ stdout mode is binary and the length is greater than 66,000 bytes (or less,
+ depending on heap usage).
-- Issue #7361: Importlib was not properly checking the number of bytes in
- bytecode file when it was less then 8 bytes.
+- Issue #11320: fix bogus memory management in Modules/getpath.c, leading to
+ a possible crash when calling Py_SetPath().
-- Issue #7633: In the decimal module, Context class methods (with the exception
- of canonical and is_canonical) now accept instances of int and long wherever a
- Decimal instance is accepted, and implicitly convert that argument to Decimal.
- Previously only some arguments were converted.
+- Issue #11432: A bug was introduced in subprocess.Popen on posix systems with
+ 3.2.0 where the stdout or stderr file descriptor being the same as the stdin
+ file descriptor would raise an exception. webbrowser.open would fail. fixed.
-- Issue #7835: shelve should no longer produce mysterious warnings during
- interpreter shutdown.
+- Issue #9856: Change object.__format__ with a non-empty format string
+ to be a DeprecationWarning. In 3.2 it was a PendingDeprecationWarning.
+ In 3.4 it will be a TypeError.
-- Issue #2746: Don't escape ampersands and angle brackets ("&", "<", ">") in XML
- processing instructions and comments. These raw characters are allowed by the
- XML specification, and are necessary when outputting e.g. PHP code in a
- processing instruction. Patch by Neil Muller.
+- Issue #11244: The peephole optimizer is now able to constant-fold
+ arbitrarily complex expressions. This also fixes a 3.2 regression where
+ operations involving negative numbers were not constant-folded.
-- Issue #6233: ElementTree failed converting unicode characters to XML entities
- when they could't be represented in the requested output encoding. Patch by
- Jerry Chen.
+- Issue #11450: Don't truncate hg version info in Py_GetBuildInfo() when
+ there are many tags (e.g. when using mq). Patch by Nadeem Vawda.
-- Issue #6003: add an argument to ``zipfile.Zipfile.writestr`` to specify the
- compression type.
+- Issue #11335: Fixed a memory leak in list.sort when the key function
+ throws an exception.
-- Issue #4772: Raise a ValueError when an unknown Bluetooth protocol is
- specified, rather than fall through to AF_PACKET (in the `socket` module).
- Also, raise ValueError rather than TypeError when an unknown TIPC address type
- is specified. Patch by Brian Curtin.
+- Issue #8923: When a string is encoded to UTF-8 in strict mode, the result is
+ cached into the object. Examples: str.encode(), str.encode('utf-8'),
+ PyUnicode_AsUTF8String() and PyUnicode_AsEncodedString(unicode, "utf-8",
+ NULL).
-- Issue #6939: Fix file I/O objects in the `io` module to keep the original file
- position when calling `truncate()`. It would previously change the file
- position to the given argument, which goes against the tradition of
- ftruncate() and other truncation APIs. Patch by Pascal Chambon.
+- Issue #10831: PyUnicode_FromFormat() supports %li, %lli and %zi formats.
-- Issue #7610: Reworked implementation of the internal
- :class:`zipfile.ZipExtFile` class used to represent files stored inside an
- archive. The new implementation is significantly faster and can be wrapped in
- a :class:`io.BufferedReader` object for more speedups. It also solves an
- issue where interleaved calls to `read()` and `readline()` give wrong results.
- Patch by Nir Aides.
+- Issue #10829: Refactor PyUnicode_FromFormat(), use the same function to parse
+ the format string in the 3 steps, fix crashs on invalid format strings.
-- Issue #6963: Added "maxtasksperchild" argument to multiprocessing.Pool,
- allowing for a maximum number of tasks within the pool to be completed by the
- worker before that worker is terminated, and a new one created to replace it.
+- Issue #13007: whichdb should recognize gdbm 1.9 magic numbers.
-- Issue #7792: Registering non-classes to ABCs raised an obscure error.
+- Issue #11246: Fix PyUnicode_FromFormat("%V") to decode the byte string from
+ UTF-8 (with replace error handler) instead of ISO-8859-1 (in strict mode).
+ Patch written by Ray Allen.
-- Issue #7785: Don't accept bytes in FileIO.write().
+- Issue #11286: Raise a ValueError from calling PyMemoryView_FromBuffer with
+ a buffer struct having a NULL data pointer.
-- Removed the functions 'verify' and 'vereq' from Lib/test/support.py.
+- Issue #11272: On Windows, input() strips '\r' (and not only '\n'), and
+ sys.stdin uses universal newline (replace '\r\n' by '\n').
-- Issue #7773: Fix an UnboundLocalError in platform.linux_distribution() when
- the release file is empty.
+- Issue #11828: startswith and endswith now accept None as slice index.
+ Patch by Torsten Becker.
-- Issue #7561: Fix crashes when using bytearray objects with the posix
- module.
+- Issue #10830: Fix PyUnicode_FromFormatV("%c") for non-BMP characters on
+ narrow build.
-- Issue #1670765: Prevent email.generator.Generator from re-wrapping headers in
- multipart/signed MIME parts, which fixes one of the sources of invalid
- modifications to such parts by Generator.
+- Issue #11168: Remove filename debug variable from PyEval_EvalFrameEx().
+ It encoded the Unicode filename to UTF-8, but the encoding fails on
+ undecodable filename (on surrogate characters) which raises an unexpected
+ UnicodeEncodeError on recursion limit.
-- Issue #7703: Add support for the new buffer API to `binascii.a2bhqx`. Patch
- by Florent Xicluna, along with some additional tests.
+- Issue #11187: Remove bootstrap code (use ASCII) of
+ PyUnicode_AsEncodedString(), it was replaced by a better fallback (use the
+ locale encoding) in PyUnicode_EncodeFSDefault().
-- Issue #7701: Fix crash in binascii.b2a_uu() in debug mode when given a 1-byte
- argument. Patch by Victor Stinner.
+- Check for NULL result in PyType_FromSpec.
-- Issue #3299: Fix possible crash in the _sre module when given bad argument
- values in debug mode. Patch by Victor Stinner.
+- Issue #10516: New copy() and clear() methods for lists and bytearrays.
-- Issue #2846: Add support for gzip.GzipFile reading zero-padded files. Patch
- by Brian Curtin.
+- Issue #11386: bytearray.pop() now throws IndexError when the bytearray is
+ empty, instead of OverflowError.
-- Issue #7681: Use floor division in appropiate places in the wave module.
+- Issue #12380: The rjust, ljust and center methods of bytes and bytearray
+ now accept a bytearray argument.
-- Issue #5372: Drop the reuse of .o files in Distutils' ccompiler (since
- Extension extra options may change the output without changing the .c
- file). Initial patch by Collin Winter.
+Library
+-------
-- Issue #7617: Make sure distutils.unixccompiler.UnixCCompiler recognizes gcc
- when it has a fully qualified configuration prefix. Initial patch by Arfrever.
+- Issue #14195: An issue that caused weakref.WeakSet instances to incorrectly
+ return True for a WeakSet instance 'a' in both 'a < a' and 'a > a' has been
+ fixed.
-- Issue #7105: Make WeakKeyDictionary and WeakValueDictionary robust against the
- destruction of weakref'ed objects while iterating.
+- Issue #14166: Pickler objects now have an optional ``dispatch_table``
+ attribute which allows to set custom per-pickler reduction functions.
+ Patch by sbt.
-- Issue #7455: Fix possible crash in cPickle on invalid input. Patch by Victor
- Stinner.
+- Issue #14177: marshal.loads() now raises TypeError when given an unicode
+ string. Patch by Guilherme Gonçalves.
-- Issue #1628205: Socket file objects returned by socket.socket.makefile() now
- properly handles EINTR within the read, readline, write & flush methods. The
- socket.sendall() method now properly handles interrupted system calls.
+- Issue #13550: Remove the debug machinery from the threading module: remove
+ verbose arguments from all threading classes and functions.
-- Issue #7471: Improve the performance of GzipFile's buffering mechanism, and
- make it implement the `io.BufferedIOBase` ABC to allow for further speedups by
- wrapping it in an `io.BufferedReader`. Patch by Nir Aides.
+- Issue #14159: Fix the len() of weak containers (WeakSet, WeakKeyDictionary,
+ WeakValueDictionary) to return a better approximation when some objects
+ are dead or dying. Moreover, the implementation is now O(1) rather than
+ O(n).
-- Issue #3972: http.client.HTTPConnection now accepts an optional source_address
- parameter to allow specifying where your connections come from.
+- Issue #13125: Silence spurious test_lib2to3 output when in non-verbose mode.
+ Patch by Mikhail Novikov.
-- socket.create_connection now accepts an optional source_address parameter.
+- Issue #11841: Fix comparison bug with 'rc' versions in packaging.version.
+ Patch by Filip Gruszczyński.
-- Issue #5511: now zipfile.ZipFile can be used as a context manager. Initial
- patch by Brian Curtin.
+- Issue #13447: Add a test file to host regression tests for bugs in the
+ scripts found in the Tools directory.
-- Issue #7556: Make sure Distutils' msvc9compile reads and writes the MSVC XML
- Manifest file in text mode so string patterns can be used in regular
- expressions.
+- Issue #6884: Fix long-standing bugs with MANIFEST.in parsing in distutils
+ on Windows. Also fixed in packaging.
-- Issue #7552: Removed line feed in the base64 Authorization header in the
- Distutils upload command to avoid an error when PyPI reads it. This occurs on
- long passwords. Initial patch by JP St. Pierre.
+- Issue #8033: sqlite3: Fix 64-bit integer handling in user functions
+ on 32-bit architectures. Initial patch by Philippe Devalkeneer.
-- Issue #7231: urllib2 cannot handle https with proxy requiring auth. Patch by
- Tatsuhiro Tsujikawa.
++Extension Modules
++-----------------
+
-- Issue #4757: `zlib.compress` and other methods in the zlib module now raise a
- TypeError when given an `str` object (rather than a `bytes`-like object).
- Patch by Victor Stinner and Florent Xicluna.
++- Issue #15676: Now "mmap" check for empty files before doing the
++ offset check. Patch by Steven Willis.
+
-- Issue #7349: Make methods of file objects in the io module accept None as an
- argument where file-like objects (ie StringIO and BytesIO) accept them to mean
- the same as passing no argument.
++- Issue #6493: An issue in ctypes on Windows that caused structure bitfields
++ of type ctypes.c_uint32 and width 32 to incorrectly be set has been fixed.
+
-- Issue #7357: tarfile no longer suppresses fatal extraction errors by default.
++- Issue #15000: Support the "unique" x32 architecture in _posixsubprocess.c.
+
-- Issue #5949: added check for correct lineends in input from IMAP server in
- imaplib.
++- Issue #9041: An issue in ctypes.c_longdouble, ctypes.c_double, and
++ ctypes.c_float that caused an incorrect exception to be returned in the
++ case of overflow has been fixed.
+
-- Add count() and reverse() methods to collections.deque().
++- Issue #14212: The re module didn't retain a reference to buffers it was
++ scanning, resulting in segfaults.
+
-- Fix variations of extending deques: d.extend(d) d.extendleft(d) d+=d
++Tests
++-----
+
-- Issue #6986: Fix crash in the JSON C accelerator when called with the wrong
- parameter types. Patch by Victor Stinner.
++- Issue #15304: Fix warning message when os.chdir() fails inside
++ test.support.temp_cwd(). Patch by Chris Jerdonek.
+
-- Issue #7457: added a read_pkg_file method to
- distutils.dist.DistributionMetadata.
++- Issue #15802: Fix test logic in TestMaildir.test_create_tmp. Patch
++ by Serhiy Storchaka.
+
-- logging: Added optional `secure` parameter to SMTPHandler, to enable use of
- TLS with authentication credentials.
++- Issue #15747: ZFS always returns EOPNOTSUPP when attempting to set the
++ UF_IMMUTABLE flag (via either chflags or lchflags); refactor affected
++ tests in test_posix.py to account for this.
+
-- Issue #1923: Fixed the removal of meaningful spaces when PKG-INFO is generated
- in Distutils. Patch by Stephen Emslie.
++- Issue #15285: Refactor the approach for testing connect timeouts using
++ two external hosts that have been configured specifically for this type
++ of test.
+
-- Issue #4120: Drop reference to CRT from manifest when building extensions with
- msvc9compiler.
++- Issue #15615: Add some tests for the json module's handling of invalid
++ input data. Patch by Kushal Das.
+
-- Issue #7333: The `posix` module gains an `initgroups()` function providing
- access to the initgroups(3) C library call on Unix systems which implement it.
- Patch by Jean-Paul Calderone.
++- Issue #15496: Add directory removal helpers for tests on Windows.
++ Patch by Jeremy Kloth.
+
-- Issue #7408: Fixed distutils.tests.sdist so it doesn't check for group
- ownership when the group is not forced, because the group may be different
- from the user's group and inherit from its container when the test is run.
++- Issue #15467: Move helpers for __sizeof__ tests into test_support.
++ Patch by Serhiy Storchaka.
+
-- Issue #4486: When an exception has an explicit cause, do not print its
- implicit context too. This affects the `traceback` module as well as built-in
- exception printing.
++- Issue #15320: Make iterating the list of tests thread-safe when running
++ tests in multiprocess mode. Patch by Chris Jerdonek.
+
-- Issue #1515: Enable use of deepcopy() with instance methods. Patch by Robert
- Collins.
++- Issue #15230: Adopted a more systematic approach in the runpy tests
+
-- Issue #7403: logging: Fixed possible race condition in lock creation.
++- Issue #15300: Ensure the temporary test working directories are in the same
++ parent folder when running tests in multiprocess mode from a Python build.
++ Patch by Chris Jerdonek.
+
-- Issue #6845: Add restart support for binary upload in ftplib. The
- `storbinary()` method of FTP and FTP_TLS objects gains an optional `rest`
- argument. Patch by Pablo Mouzo.
++- test_nntplib now tolerates being run from behind NNTP gateways that add
++ "X-Antivirus" headers to articles
+
-- Issue #5788: `datetime.timedelta` objects get a new `total_seconds()` method
- returning the total number of seconds in the duration. Patch by Brian
- Quinlan.
++- Issue #15043: test_gdb is now skipped entirely if gdb security settings
++ block loading of the gdb hooks
+
-- Issue #7133: SSL objects now support the new buffer API.
++- Issue #14026: In test_cmd_line_script, check that sys.argv is populated
++ correctly for the various invocation approaches (Patch by Jason Yeo)
+
-- Issue #1488943: difflib.Differ() doesn't always add hints for tab characters.
++- Issue #14032: Fix incorrect variable name in test_cmd_line_script debugging
++ message (Patch by Jason Yeo)
+
-- Issue #6123: tarfile now opens empty archives correctly and consistently
- raises ReadError on empty files.
++- Issue #14589: Update certificate chain for sha256.tbs-internet.com, fixing
++ a test failure in test_ssl.
+
-- Issue #7354: distutils.tests.test_msvc9compiler - dragfullwindows can be 2.
++Build
++-----
+
-- Issue #5037: Proxy the __bytes__ special method instead to __bytes__ instead
- of __str__.
++- Issue #15923: fix a mistake in asdl_c.py that resulted in a TypeError after
++ 2801bf875a24 (see #15801).
+
-- Issue #7341: Close the internal file object in the TarFile constructor in case
- of an error.
++- Issue #11715: Fix multiarch detection without having Debian development
++ tools (dpkg-dev) installed.
+
-- Issue #7293: distutils.test_msvc9compiler is fixed to work on any fresh
- Windows box. Help provided by David Bolen.
++- Issue #15819: Make sure we can build Python out-of-tree from a readonly
++ source directory. (Somewhat related to Issue #9860.)
+
-- Issue #2054: ftplib now provides an FTP_TLS class to do secure FTP using TLS
- or SSL. Patch by Giampaolo Rodola'.
++- Issue #15822: Ensure 2to3 grammar pickles are properly installed.
+
-- Issue #7328: pydoc no longer corrupts sys.path when run with the '-m' switch.
++- Issue #15560: Fix building _sqlite3 extension on OS X with an SDK.
+
-- Issue #4969: The mimetypes module now reads the MIME database from the
- registry under Windows. Patch by Gabriel Genellina.
++- Issue #8847: Disable COMDAT folding in Windows PGO builds.
+
-- Issue #6816: runpy now provides a run_path function that allows Python code to
- execute file paths that refer to source or compiled Python files as well as
- zipfiles, directories and other valid sys.path entries that contain a
- __main__.py file. This allows applications that run other Python scripts to
- support the same flexibility as the CPython command line itself.
++- Issue #14197: For OS X framework builds, ensure links to the shared
++ library are created with the proper ABI suffix.
+
-- Issue #7318: multiprocessing now uses a timeout when it fails to establish a
- connection with another process, rather than looping endlessly. The default
- timeout is 20 seconds, which should be amply sufficient for local connections.
++- Issue #14472: Update .gitignore. Patch by Matej Cepl.
+
-- Issue #7197: Allow unittest.TextTestRunner objects to be pickled and
- unpickled. This fixes crashes under Windows when trying to run
- test_multiprocessing in verbose mode.
++- The Windows build now uses OpenSSL 1.0.0j and bzip2 1.0.6.
+
-- Issue #7893: ``unittest.TextTestResult`` is made public and a ``resultclass``
- argument added to the TextTestRunner constructor allowing a different result
- class to be used without having to subclass.
++- Issue #14557: Fix extensions build on HP-UX. Patch by Adi Roiban.
+
-- Issue #7588: ``unittest.TextTestResult.getDescription`` now includes the test
- name in failure reports even if the test has a docstring.
++- Issue #14437: Fix building the _io module under Cygwin.
+
-- Issue #3001: Add a C implementation of recursive locks which is used by
- default when instantiating a `threading.RLock` object. This makes recursive
- locks as fast as regular non-recursive locks (previously, they were slower by
- 10x to 15x).
++- Issue #14387: Do not include accu.h from Python.h.
+
-- Issue #7282: Fix a memory leak when an RLock was used in a thread other than
- those started through `threading.Thread` (for example, using
- `_thread.start_new_thread()`).
++- Issue #14359: Only use O_CLOEXEC in _posixmodule.c if it is defined.
++ Based on patch from Hervé Coatanhay.
+
-- Issue #7187: Importlib would not silence the IOError raised when trying to
- write new bytecode when it was made read-only.
++- Issue #14018: Fix OS X Tcl/Tk framework checking when using OS X SDKs.
+
-- Issue #7264: Fix a possible deadlock when deallocating thread-local objects
- which are part of a reference cycle.
++Documentation
++-------------
+
-- Issue #7211: Allow 64-bit values for the `ident` and `data` fields of kevent
- objects on 64-bit systems. Patch by Michael Broghton.
++- Issue #16115: Improve subprocess.Popen() documentation around args, shell,
++ and executable arguments.
+
-- Issue #6896: mailbox.Maildir now invalidates its internal cache each time a
- modification is done through it. This fixes inconsistencies and test failures
- on systems with slightly bogus mtime behaviour.
++- Issue #13498: Clarify docs of os.makedirs()'s exist_ok argument. Done with
++ great native-speaker help from R. David Murray.
+
-- Issue #7246 & Issue #7208: getpass now properly flushes input before reading
- from stdin so that existing input does not confuse it and lead to incorrect
- entry or an IOError. It also properly flushes it afterwards to avoid the
- terminal echoing the input afterwards on OSes such as Solaris.
++- Issue #15533: Clarify docs and add tests for subprocess.Popen()'s cwd
++ argument.
+
-- Issue #7233: Fix a number of two-argument Decimal methods to make sure that
- they accept an int or long as the second argument. Also fix buggy handling of
- large arguments (those with coefficient longer than the current precision) in
- shift and rotate.
++- Issue #15979: Improve timeit documentation.
+
-- Issue #4750: Store the basename of the original filename in the gzip FNAME
- header as required by RFC 1952.
++- Issue #16036: Improve documentation of built-in int()'s signature and
++ arguments.
+
-- Issue #1180: Added a new global option to ignore ~/.pydistutils.cfg in
- Distutils.
++- Issue #15935: Clarification of argparse docs, re: add_argument() type and
++ default arguments. Patch contributed by Chris Jerdonek.
+
-- Issue #7218: Fix test_site for win32, the directory comparison was done with
- an uppercase.
++- Issue #11964: Document a change in v3.2 to the behavior of the indent
++ parameter of json encoding operations.
+
-- Issue #7205: Fix a possible deadlock when using a BZ2File object from
- several threads at once.
++- Issue #14674: Add a discussion of the json module's standard compliance.
++ Patch by Chris Rebert.
+
-- Issue #7077: logging: SysLogHandler now treats Unicode as per RFC 5424.
++- Issue #15630: Add an example for "continue" stmt in the tutorial. Patch by
++ Daniel Ellis.
+
-- Issue #7099: Decimal.is_normal now returns True for numbers with exponent
- larger than emax.
++- Issue #15444: Use proper spelling for non-ASCII contributor names. Patch
++ by Serhiy Storchaka.
+
-- Issue #7080: locale.strxfrm() raises a MemoryError on 64-bit non-Windows
- platforms, and assorted locale fixes by Derk Drukker.
++- Issue 15482: Properly document the default 'level' value for __import__()
++ while warning about using negative values.
+
-- Issue #5833: Fix extra space character in readline completion with the GNU
- readline library version 6.0.
++- Issue #15230: Clearly document some of the limitations of the runpy
++ module and nudge readers towards importlib when appropriate.
+
-- Issue #6894: Fixed the issue urllib2 doesn't respect "no_proxy" environment.
++- Issue #13557: Clarify effect of giving two different namespaces to exec or
++ execfile().
+
-- Issue #7086: Added TCP support to SysLogHandler, and tidied up some
- anachronisms in the code which were a relic of 1.5.2 compatibility.
++- Issue #8799: Fix and improve the threading.Condition documentation.
+
-- Issue #7082: When falling back to the MIME 'name' parameter, the correct place
- to look for it is the Content-Type header.
++- Issue #14943: Correct a default argument value for winreg.OpenKey
++ and correctly list the argument names in the function's explanation.
+
-- Make tokenize.detect_coding() normalize utf-8 and iso-8859-1 variants like the
- builtin tokenizer.
++- Issue #14034: added the argparse tutorial.
+
-- Issue #7048: Force Decimal.logb to round its result when that result is too
- large to fit in the current precision.
++- Issue #15250: Document that filecmp.dircmp compares files shallowly. Patch
++ contributed by Chris Jerdonek.
+
-- Issue #6236, #6348: Fix various failures in the I/O library under AIX and
- other platforms, when using a non-gcc compiler. Patch by Derk Drukker.
++Tools/Demos
++-----------
+
-- Issue #4606: Passing 'None' if ctypes argtype is set to POINTER(...) does now
- always result in NULL.
++- Issue #15378: Fix Tools/unicode/comparecodecs.py. Patch by Serhiy Storchaka.
+
-- Issue #5042: Structure sub-subclass does now initialize correctly with base
- class positional arguments.
++- Issue #14695: Fix missing support for starred assignments in
++ Tools/parser/unparse.py.
+
-- Issue #6882: Import uuid creates zombies processes.
+
-- Issue #6635: Fix profiler printing usage message.
++What's New in Python 3.2.3?
++===========================
+
-- Issue #6856: Add a filter keyword argument to TarFile.add().
++*Release date: 10-Apr-2012*
+
-- Issue #6888: pdb's alias command was broken when no arguments were given.
++Build
++-----
+
-- Issue #6857: Default format() alignment should be '>' for Decimal instances.
++- Issue #14387: Work around a problem building extension modules under Windows
++ by undefining ``small`` before use in the Python headers.
+
-- Issue #6795: int(Decimal('nan')) now raises ValueError instead of returning
- NaN or raising InvalidContext. Also, fix infinite recursion in
- long(Decimal('nan')).
+
-- Issue #6850: Fix bug in Decimal._parse_format_specifier for formats with no
- type specifier.
++What's New in Python 3.2.3 release candidate 2?
++===============================================
+
-- Issue #6239: ctypes.c_char_p return value must return bytes.
++*Release date: 18-Mar-2012*
+
-- Issue #6838: Use a list to accumulate the value instead of repeatedly
- concatenating strings in http.client's HTTPResponse._read_chunked providing a
- significant speed increase when downloading large files servend with a
- Transfer-Encoding of 'chunked'.
++Library
++-------
+
-- Trying to import a submodule from a module that is not a package, ImportError
- should be raised, not AttributeError.
++- Issue #6884: Fix long-standing bugs with MANIFEST.in parsing in distutils
++ on Windows.
+
-- When the globals past to importlib.__import__() has __package__ set to None,
- fall back to computing what __package__ should be instead of giving up.
++Extension Modules
++-----------------
+
-- Raise a TypeError when the name of a module to be imported for
- importlib.__import__ is not a string (was raising an AttributeError before).
++- Issue #14234: CVE-2012-0876: Randomize hashes of xml attributes in the hash
++ table internal to the pyexpat module's copy of the expat library to avoid a
++ denial of service due to hash collisions. Patch by David Malcolm with some
++ modifications by the expat project.
+
-- Allow the fromlist passed into importlib.__import__ to be any iterable.
+
-- Have importlib raise ImportError if None is found in sys.modules.
++What's New in Python 3.2.3 release candidate 1?
++===============================================
+
-- Issue #6054: Do not normalize stored pathnames in tarfile.
++*Release date: 24-Feb-2012*
+
-- Issue #6794: Fix Decimal.compare_total and Decimal.compare_total_mag: NaN
- payloads are now ordered by integer value rather than lexicographically.
++Core and Builtins
++-----------------
+
-- Issue #1356969: Add missing info methods in tix.HList.
++- Issue #13703: oCERT-2011-003: add -R command-line option and PYTHONHASHSEED
++ environment variable, to provide an opt-in way to protect against denial of
++ service attacks due to hash collisions within the dict and set types. Patch
++ by David Malcolm, based on work by Victor Stinner.
+
-- Issue #1522587: New constants and methods for the tix.Grid widget.
++- Issue #14084: Fix a file descriptor leak when importing a module with a
++ bad encoding.
+
-- Issue #1250469: Fix the return value of tix.PanedWindow.panes.
++- Issue #13020: Fix a reference leak when allocating a structsequence object
++ fails. Patch by Suman Saha.
+
-- Issue #1119673: Do not override tkinter.Text methods when creating a
- ScrolledText.
++- Issue #13908: Ready types returned from PyType_FromSpec.
+
-- Issue #6665: Fix fnmatch to properly match filenames with newlines in them.
++- Issue #11235: Fix OverflowError when trying to import a source file whose
++ modification time doesn't fit in a 32-bit timestamp.
+
-- Issue #1135: Add the XView and YView mix-ins to avoid duplicating the xview*
- and yview* methods.
++- Fix the builtin module initialization code to store the init function for
++ future reinitialization.
+
-- Issue #6629: Fix a data corruption issue in the new I/O library, which could
- occur when writing to a BufferedRandom object (e.g. a file opened in "rb+" or
- "wb+" mode) after having buffered a certain amount of data for reading. This
- bug was not present in the pure Python implementation.
++- Issue #8052: The posix subprocess module would take a long time closing
++ all possible file descriptors in the child process rather than just open
++ file descriptors. It now closes only the open fds if possible for the
++ default close_fds=True behavior.
+
-- Issue #6622: Fix "local variable 'secret' referenced before assignment" bug in
- POP3.apop.
++- Issue #13629: Renumber the tokens in token.h so that they match the indexes
++ into _PyParser_TokenNames.
+
-- Issue #2715: Remove remnants of Carbon.File from binhex module.
++- Fix the fix for issue #12149: it was incorrect, although it had the side
++ effect of appearing to resolve the issue. Thanks to Mark Shannon for
++ noticing.
+
-- Issue #6595: The Decimal constructor now allows arbitrary Unicode decimal
- digits in input, as recommended by the standard. Previously it was restricted
- to accepting [0-9].
++- Issue #13505: Pickle bytes objects in a way that is compatible with
++ Python 2 when using protocols <= 2.
+
-- Issue #6106: telnetlib.Telnet.process_rawq doesn't handle default WILL/WONT
- DO/DONT correctly.
++- Issue #11147: Fix an unused argument in _Py_ANNOTATE_MEMORY_ORDER. (Fix
++ given by Campbell Barton).
+
-- Issue #1424152: Fix for http.client, urllib.request to support SSL while
- working through proxy. Original patch by Christopher Li, changes made by
- Senthil Kumaran.
++- Issue #7111: Python can now be run without a stdin, stdout or stderr
++ stream. It was already the case with Python 2. However, the corresponding
++ sys module entries are now set to None (instead of an unusable file object).
+
-- Add importlib.abc.ExecutionLoader to represent the PEP 302 protocol for
- loaders that allow for modules to be executed. Both importlib.abc.PyLoader and
- PyPycLoader inherit from this class and provide implementations in relation to
- other methods required by the ABCs.
++- Issue #13436: Fix a bogus error message when an AST object was passed
++ an invalid integer value.
+
-- importlib.abc.PyLoader did not inherit from importlib.abc.ResourceLoader like
- the documentation said it did even though the code in PyLoader relied on the
- abstract method required by ResourceLoader.
++- Issue #13338: Handle all enumerations in _Py_ANNOTATE_MEMORY_ORDER
++ to allow compiling extension modules with -Wswitch-enum on gcc.
++ Initial patch by Floris Bruynooghe.
+
-- Issue #6431: Make Fraction type return NotImplemented when it doesn't know how
- to handle a comparison without loss of precision. Also add correct handling
- of infinities and nans for comparisons with float.
++- Issue #13333: The UTF-7 decoder now accepts lone surrogates (the encoder
++ already accepts them).
+
-- Issue #6415: Fixed warnings.warn segfault on bad formatted string.
++- Issue #13342: input() used to ignore sys.stdin's and sys.stdout's unicode
++ error handler in interactive mode (when calling into PyOS_Readline()).
+
-- Issue #6358: The exit status of a command started with os.popen() was reported
- differently than it did with python 2.x.
++- Issue #13343: Fix a SystemError when a lambda expression uses a global
++ variable in the default value of a keyword-only argument:
++ (lambda *, arg=GLOBAL_NAME: None)
+
-- Issue #6323: The pdb debugger did not exit when running a script with a syntax
- error.
++- Issue #10519: Avoid unnecessary recursive function calls in
++ setobject.c.
+
-- Issue #3392: The subprocess communicate() method no longer fails in select()
- when file descriptors are large; communicate() now uses poll() when possible.
++- Issue #10363: Deallocate global locks in Py_Finalize().
+
-- Issue #6369: Fix an RLE decompression bug in the binhex module.
++- Issue #13018: Fix reference leaks in error paths in dictobject.c.
++ Patch by Suman Saha.
+
-- Issue #6344: Fixed a crash of mmap.read() when passed a negative argument.
++- Issue #1294232: In a few cases involving metaclass inheritance, the
++ interpreter would sometimes invoke the wrong metaclass when building a new
++ class object. These cases now behave correctly. Patch by Daniel Urban.
+
-- The deprecated function string.maketrans has been removed.
++- Issue #12604: VTRACE macro expanded to no-op in _sre.c to avoid compiler
++ warnings. Patch by Josh Triplett and Petri Lehtinen.
+
-- Issue #4005: Fixed a crash of pydoc when there was a zip file present in
- sys.path.
++- Issue #13188: When called without an explicit traceback argument,
++ generator.throw() now gets the traceback from the passed exception's
++ ``__traceback__`` attribute. Patch by Petri Lehtinen.
+
-- Issue #6218: io.StringIO and io.BytesIO instances are now picklable.
++- Issue #7833: Extension modules built using distutils on Windows will no
++ longer include a "manifest" to prevent them failing at import time in some
++ embedded situations.
+
-- The os.get_exec_path() function to return the list of directories that will be
- searched for an executable when launching a subprocess was added.
++- Issue #13063: the Windows error ERROR_NO_DATA (numbered 232 and described
++ as "The pipe is being closed") is now mapped to POSIX errno EPIPE
++ (previously EINVAL).
+
-- Issue #7481: When a threading.Thread failed to start it would leave the
- instance stuck in initial state and present in threading.enumerate().
++- Issue #12911: Fix memory consumption when calculating the repr() of huge
++ tuples or lists.
+
-- Issue #1068268: The subprocess module now handles EINTR in internal os.waitpid
- and os.read system calls where appropriate.
++- Issue #7732: Don't open a directory as a file anymore while importing a
++ module. Ignore the direcotry if its name matchs the module name (e.g.
++ "__init__.py") and raise a ImportError instead.
+
-- Issue #6729: Added ctypes.c_ssize_t to represent ssize_t.
++- Issue #13021: Missing decref on an error path. Thanks to Suman Saha for
++ finding the bug and providing a patch.
+
-- Issue #6247: The argparse module has been added to the standard library.
++- Issue #12973: Fix overflow checks that relied on undefined behaviour in
++ list_repeat (listobject.c) and islice_next (itertoolsmodule.c). These bugs
++ caused test failures with recent versions of Clang.
+
-- Issue #8235: _socket: Add the constant ``SO_SETFIB``. SO_SETFIB is a socket
- option available on FreeBSD 7.1 and newer.
++- Issue #12802: the Windows error ERROR_DIRECTORY (numbered 267) is now
++ mapped to POSIX errno ENOTDIR (previously EINVAL).
+
-- Issue #9315: Fix for the trace module to record correct class name
- for tracing methods.
++- Issue #9200: The str.is* methods now work with strings that contain non-BMP
++ characters even in narrow Unicode builds.
+
-Extension Modules
------------------
++- Issue #12791: Break reference cycles early when a generator exits with
++ an exception.
+
-- Issue #9959: Tweak formula used for computing math.log of an integer,
- making it marginally more accurate for exact powers of 2.
++- Issue #12266: Fix str.capitalize() to correctly uppercase/lowercase
++ titlecased and cased non-letter characters.
+
-- Issue #9422: Fix memory leak when re-initializing a struct.Struct object.
++Library
++-------
+
-- Issue #7900: The getgroups(2) system call on MacOSX behaves rather oddly
- compared to other unix systems. In particular, os.getgroups() does not reflect
- any changes made using os.setgroups() but basicly always returns the same
- information as the id command. os.getgroups() can now return more than 16
- groups on MacOSX.
+- HTMLParser is now able to handle slashes in the start tag.
-- Issue #6095: Make directory argument to os.listdir optional.
+- Issue #13641: Decoding functions in the base64 module now accept ASCII-only
+ unicode strings. Patch by Catalin Iacob.
-- Issue #9277: Fix bug in struct.pack for bools in standard mode (e.g.,
- struct.pack('>?')): if conversion to bool raised an exception then that
- exception wasn't properly propagated on machines where char is unsigned.
+- Issue #14043: Speed up importlib's _FileFinder by at least 8x, and add a
+ new importlib.invalidate_caches() function.
-- Issue #5180: Fixed a bug that prevented loading 2.x pickles in 3.x python when
- they contain instances of old-style classes.
+- Issue #14001: CVE-2012-0845: xmlrpc: Fix an endless loop in
+ SimpleXMLRPCServer upon malformed POST request.
-- Issue #9165: Add new functions math.isfinite and cmath.isfinite, to accompany
- existing isinf and isnan functions.
+- Issue #13961: Move importlib over to using os.replace() for atomic renaming.
-- Issue #1578269: Implement os.symlink for Windows 6.0+. Patch by Jason
- R. Coombs.
+- Do away with ambiguous level values (as suggested by PEP 328) in
+ importlib.__import__() by raising ValueError when level < 0.
-- In struct.pack, correctly propogate exceptions from computing the truth of an
- object in the '?' format.
+- Issue #2489: pty.spawn could consume 100% cpu when it encountered an EOF.
-- Issue #9000: datetime.timezone objects now have eval-friendly repr.
+- Issue #13014: Fix a possible reference leak in SSLSocket.getpeercert().
-- In the math module, correctly lookup __trunc__, __ceil__, and __floor__ as
- special methods.
+- Issue #13777: Add PF_SYSTEM sockets on OS X.
+ Patch by Michael Goderbauer.
-- Issue #9005: Prevent utctimetuple() from producing year 0 or year 10,000.
- Prior to this change, timezone adjustment in utctimetuple() could produce
- tm_year value of 0 or 10,000. Now an OverflowError is raised in these edge
- cases.
+- Issue #13015: Fix a possible reference leak in defaultdict.__repr__.
+ Patch by Suman Saha.
-- Issue #6641: The ``datetime.strptime`` method now supports the ``%z``
- directive. When the ``%z`` directive is present in the format string, an
- aware ``datetime`` object is returned with ``tzinfo`` bound to a
- ``datetime.timezone`` instance constructed from the parsed offset. If both
- ``%z`` and ``%Z`` are present, the data in ``%Z`` field is used for timezone
- name, but ``%Z`` data without ``%z`` is discarded.
+- Issue #1326113: distutils' and packaging's build_ext commands option now
+ correctly parses multiple values (separated by whitespace or commas) given
+ to their --libraries option.
-- Issue #5094: The ``datetime`` module now has a simple concrete class
- implementing ``datetime.tzinfo`` interface. Instances of the new class,
- ``datetime.timezone``, return fixed name and UTC offset from their
- ``tzname(dt)`` and ``utcoffset(dt)`` methods. The ``dst(dt)`` method always
- returns ``None``. A class attribute, ``utc`` contains an instance
- representing the UTC timezone. Original patch by Rafe Kaplan.
+- Issue #10287: nntplib now queries the server's CAPABILITIES first before
+ sending MODE READER, and only sends it if not already in READER mode.
+ Patch by Hynek Schlawack.
-- Issue #8973: Add __all__ to struct module; this ensures that help(struct)
- includes documentation for the struct.Struct class.
+- Issue #13993: HTMLParser is now able to handle broken end tags when
+ strict=False.
-- Issue #3129: Trailing digits in struct format string are no longer ignored.
- For example, "1" or "ilib123" are now invalid formats and cause
- ``struct.error`` to be raised. Patch by Caleb Deveraux.
+- Issue #13930: lib2to3 now supports writing converted output files to another
+ directory tree as well as copying unchanged files and altering the file
+ suffix.
-- Issue #7384: If the system readline library is linked against ncurses, the
- curses module must be linked against ncurses as well. Otherwise it is not safe
- to load both the readline and curses modules in an application.
+- Issue #9750: Fix sqlite3.Connection.iterdump on tables and fields
+ with a name that is a keyword or contains quotes. Patch by Marko
+ Kohtala.
-- Issue #2810: Fix cases where the Windows registry API returns ERROR_MORE_DATA,
- requiring a re-try in order to get the complete result.
+- Issue #10287: nntplib now queries the server's CAPABILITIES again after
+ authenticating (since the result may change, according to RFC 4643).
+ Patch by Hynek Schlawack.
-- Issue #8692: Optimize math.factorial: replace the previous naive algorithm
- with an improved 'binary-split' algorithm that uses fewer multiplications and
- allows many of the multiplications to be performed using plain C integer
- arithmetic instead of PyLong arithmetic. Also uses a lookup table for small
- arguments.
+- Issue #13989: Document that GzipFile does not support text mode, and give a
+ more helpful error message when opened with an invalid mode string.
-- Issue #8674: Fixed a number of incorrect or undefined-behaviour-inducing
- overflow checks in the audioop module.
+- Issue #13590: On OS X 10.7 and 10.6 with Xcode 4.2, building
+ Distutils-based packages with C extension modules may fail because
+ Apple has removed gcc-4.2, the version used to build python.org
+ 64-bit/32-bit Pythons. If the user does not explicitly override
+ the default C compiler by setting the CC environment variable,
+ Distutils will now attempt to compile extension modules with clang
+ if gcc-4.2 is required but not found. Also as a convenience, if
+ the user does explicitly set CC, substitute its value as the default
+ compiler in the Distutils LDSHARED configuration variable for OS X.
+ (Note, the python.org 32-bit-only Pythons use gcc-4.0 and the 10.4u
+ SDK, neither of which are available in Xcode 4. This change does not
+ attempt to override settings to support their use with Xcode 4.)
-- Issue #8644: The accuracy of td.total_seconds() has been improved (by
- calculating with integer arithmetic instead of float arithmetic internally):
- the result is now always correctly rounded, and is equivalent to ``td /
- timedelta(seconds=1)``.
+- Issue #13960: HTMLParser is now able to handle broken comments when
+ strict=False.
-- Issue #2706: Allow division of a timedelta by another timedelta: timedelta /
- timedelta, timedelta % timedelta, timedelta // timedelta and divmod(timedelta,
- timedelta) are all supported.
+- Issue #13921: Undocument and clean up sqlite3.OptimizedUnicode,
+ which is obsolete in Python 3.x. It's now aliased to str for
+ backwards compatibility.
-- Issue #8314: Fix unsigned long long bug in libffi on Sparc v8.
+- When '' is a path (e.g. in sys.path), make sure __file__ uses the current
+ working directory instead of '' in importlib.
-- Issue #8300: When passing a non-integer argument to struct.pack with any
- integer format code, struct.pack first attempts to convert the non-integer
- using its __index__ method. If that method is non-existent or raises
- TypeError it goes on to try the __int__ method, as described below.
+- Issue #13609: Add two functions to query the terminal size:
+ os.get_terminal_size (low level) and shutil.get_terminal_size (high level).
+ Patch by Zbigniew Jędrzejewski-Szmek.
-- Issue #8142: Update libffi to the 3.0.9 release.
+- Issue #13845: On Windows, time.time() now uses GetSystemTimeAsFileTime()
+ instead of ftime() to have a resolution of 100 ns instead of 1 ms (the clock
+ accuracy is between 0.5 ms and 15 ms).
-- Issue #6949: Allow the _dbm extension to be built with db 4.8.x.
+- Issue #13846: Add time.monotonic(), monotonic clock.
-- Issue #6544: Fix a reference leak in the kqueue implementation's error
- handling.
+- Issue #8184: multiprocessing: On Windows, don't set SO_REUSEADDR on
+ Connection sockets, and set FILE_FLAG_FIRST_PIPE_INSTANCE on named pipes, to
+ make sure two listeners can't bind to the same socket/pipe (or any existing
+ socket/pipe).
-- Stop providing crtassem.h symbols when compiling with Visual Studio 2010, as
- msvcr100.dll is not a platform assembly anymore.
+- Issue #10811: Fix recursive usage of cursors. Instead of crashing,
+ raise a ProgrammingError now.
-- Issue #6508: Add posix.{getresuid,getresgid,setresuid,setresgid}.
+- Issue #10881: Fix test_site failure with OS X framework builds.
-- Issue #7078: Set struct.__doc__ from _struct.__doc__.
+- Issue #964437: Make IDLE help window non-modal.
+ Patch by Guilherme Polo and Roger Serwy.
-- Issue #3366: Add erf, erfc, expm1, gamma, lgamma functions to math module.
+- Issue #13734: Add os.fwalk(), a directory walking function yielding file
+ descriptors.
-- Issue #6877: It is now possible to link the readline extension to the libedit
- readline emulation on OSX 10.5 or later.
+- Issue #2945: Make the distutils upload command aware of bdist_rpm products.
-- Issue #6848: Fix curses module build failure on OS X 10.6.
+- Issue #13712: pysetup create should not convert package_data to extra_files.
-- Fix a segfault that could be triggered by expat with specially formed input.
+- Issue #11805: package_data in setup.cfg should allow more than one value.
-- Issue #6561: '\d' in a regex now matches only characters with Unicode category
- 'Nd' (Number, Decimal Digit). Previously it also matched characters with
- category 'No'.
+- Issue #13933: IDLE auto-complete did not work with some imported
+ module, like hashlib. (Patch by Roger Serwy)
-- Issue #4509: Array objects are no longer modified after an operation failing
- due to the resize restriction in-place when the object has exported buffers.
+- Issue #13901: Prevent test_distutils failures on OS X with --enable-shared.
-- Issue #2389: Array objects are now pickled in a portable manner.
+- Issue #13676: Handle strings with embedded zeros correctly in sqlite3.
-- Expat: Fix DoS via XML document with malformed UTF-8 sequences
- (CVE_2009_3560).
+- Issue #13506: Add '' to path for IDLE Shell when started and restarted with Restart Shell.
+ Original patches by Marco Scataglini and Roger Serwy.
-- Issue #7242: On Solaris 9 and earlier calling os.fork() from within a thread
- could raise an incorrect RuntimeError about not holding the import lock. The
- import lock is now reinitialized after fork.
+- Issue #8828: Add new function os.replace(), for cross-platform renaming
+ with overwriting.
-- Issue #7999: os.setreuid() and os.setregid() would refuse to accept a -1
- parameter on some platforms such as OS X.
+- Issue #13848: open() and the FileIO constructor now check for NUL
+ characters in the file name. Patch by Hynek Schlawack.
-- Build the ossaudio extension on GNU/kFreeBSD.
+- Issue #13806: The size check in audioop decompression functions was too
+ strict and could reject valid compressed data. Patch by Oleg Plakhotnyuk.
-- Issue #7347: winreg: Add CreateKeyEx and DeleteKeyEx, as well as fix a bug in
- the return value of QueryReflectionKey.
+- Issue #13812: When a multiprocessing Process child raises an exception,
+ flush stderr after printing the exception traceback.
-- Issue #7567: PyCurses_setupterm: Don't call ``setupterm`` twice.
+- Issue #13885: CVE-2011-3389: the _ssl module would always disable the CBC
+ IV attack countermeasure.
-Build
------
+- Issue #13847: time.localtime() and time.gmtime() now raise an OSError instead
+ of ValueError on failure. time.ctime() and time.asctime() now raises an
+ OSError if localtime() failed. time.clock() now raises a RuntimeError if the
+ processor time used is not available or its value cannot be represented
-- Use OpenSSL 1.0.0a on Windows.
+- Issue #13862: Fix spurious failure in test_zlib due to runtime/compile time
+ minor versions not matching.
-- Issue #9280: Make sharedinstall depend on sharedmods.
+- Issue #12804: Fix test_socket and test_urllib2net failures when running tests
+ on a system without internet access.
-- Issue #9189: Make a user-specified CFLAGS, CPPFLAGS, or LDFLAGS setting
- override the configure and makefile defaults, without deleting options the
- user didn't intend to override. Developers should no longer need to specify
- OPT or EXTRA_CFLAGS, although those variables are still present for
- backward-compatibility.
+- Issue #13772: In os.symlink() under Windows, do not try to guess the link
+ target's type (file or directory). The detection was buggy and made the
+ call non-atomic (therefore prone to race conditions).
-- Issue #8854: Fix finding Visual Studio 2008 on Windows x64.
+- Issue #6631: Disallow relative file paths in urllib urlopen methods.
-- Issue #1759169, #8864: Drop _XOPEN_SOURCE on Solaris, define it for
- multiprocessing only.
+- Issue #13722: Avoid silencing ImportErrors when initializing the codecs
+ registry.
-- Issue #8625: Turn off optimization in --with-pydebug builds with gcc.
- (Optimization was unintentionally turned on in gcc --with-pydebug builds as a
- result of the issue #1628484 fix, combined with autoconf's strange choice of
- default CFLAGS produced by AC_PROG_CC for gcc.)
+- Issue #13781: Fix GzipFile bug that caused an exception to be raised when
+ opening for writing using a fileobj returned by os.fdopen().
-- Issue #3646: It is now easily possible to install a Python framework into your
- home directory on MacOSX, see Mac/README for more information.
+- Issue #13803: Under Solaris, distutils doesn't include bitness
+ in the directory name.
-- Issue #3928: os.mknod() now available in Solaris, also.
+- Issue #10278: Add time.wallclock() function, monotonic clock.
-- Issue #3326: Build Python without -fno-strict-aliasing when the gcc does not
- give false warnings.
+- Issue #13809: Fix regression where bz2 module wouldn't work when threads are
+ disabled. Original patch by Amaury Forgeot d'Arc.
-- Issue #1628484: The Makefile doesn't ignore the CFLAGS environment variable
- anymore. It also forwards the LDFLAGS settings to the linker when building a
- shared library.
+- Issue #13589: Fix some serialization primitives in the aifc module.
+ Patch by Oleg Plakhotnyuk.
-- Issue #6716: Quote -x arguments of compileall in MSI installer. Exclude 2to3
- tests from compileall.
+- Issue #13642: Unquote before b64encoding user:password during Basic
+ Authentication. Patch contributed by Joonas Kuorilehto.
-- Issue #3920, #7903: Define _BSD_SOURCE on OpenBSD 4.4 through 4.9.
+- Issue #13726: Fix the ambiguous -S flag in regrtest. It is -o/--slow for slow
+ tests.
-- Issue #7632: When Py_USING_MEMORY_DEBUGGER is defined, disable the private
- memory allocation scheme in dtoa.c and use PyMem_Malloc and PyMem_Free
- instead. Also disable caching of powers of 5.
+- Issue #12364: Fix a hang in concurrent.futures.ProcessPoolExecutor.
+ The hang would occur when retrieving the result of a scheduled future after
+ the executor had been shut down.
-- Issue #6491: Allow --with-dbmliborder to specify that no dbms will be built.
+- Issue #13502: threading: Fix a race condition in Event.wait() that made it
+ return False when the event was set and cleared right after.
-- Issue #6943: Use pkg-config to find the libffi headers when the
- --with-system-ffi flag is used.
+- Issue #9993: When the source and destination are on different filesystems,
+ and the source is a symlink, shutil.move() now recreates a symlink on the
+ destination instead of copying the file contents. Patch by Jonathan Niehof
+ and Hynek Schlawack.
-- Issue #7609: Add a --with-system-expat option that causes the system's expat
- library to be used for the pyexpat module instead of the one included with
- Python.
+- Issue #12926: Fix a bug in tarfile's link extraction.
-- Issue #7589: Only build the nis module when the correct header files are
- found.
+- Issue #13696: Fix the 302 Relative URL Redirection problem.
-- Switch to OpenSSL 0.9.8l and sqlite 3.6.21 on Windows.
+- Issue #13636: Weak ciphers are now disabled by default in the ssl module
+ (except when SSLv2 is explicitly asked for).
-- Issue #5792: Extend the short float repr support to x86 systems using
- icc or suncc.
+- Issue #12715: Add an optional symlinks argument to shutil functions
+ (copyfile, copymode, copystat, copy, copy2). When that parameter is
+ true, symlinks aren't dereferenced and the operation instead acts on the
+ symlink itself (or creates one, if relevant). Patch by Hynek Schlawack.
-- Issue #6603: Change READ_TIMESTAMP macro in ceval.c so that it compiles
- correctly under gcc on x86-64. This fixes a reported problem with the
- --with-tsc build on x86-64.
+- Add a flags parameter to select.epoll.
-- Issue #6802: Fix build issues on MacOSX 10.6.
+- Issue #13626: Add support for SSL Diffie-Hellman key exchange, through the
+ SSLContext.load_dh_params() method and the ssl.OP_SINGLE_DH_USE option.
-- Issue #6244: Allow detect_tkinter to look for Tcl/Tk 8.6.
+- Issue #11006: Don't issue low level warning in subprocess when pipe2() fails.
-- Issue #4601: 'make install' did not set the appropriate permissions on
- directories.
+- Issue #13620: Support for Chrome browser in webbrowser. Patch contributed
+ by Arnaud Calmettes.
-- Issue #5390: Add uninstall icon independent of whether file extensions are
- installed.
+- Issue #11829: Fix code execution holes in inspect.getattr_static for
+ metaclasses with metaclasses. Patch by Andreas Stührk.
-- Issue #7541: When using ``python-config`` with a framework install the
- compiler might use the wrong library.
+- Issue #12708: Add starmap() and starmap_async() methods (similar to
+ itertools.starmap()) to multiprocessing.Pool. Patch by Hynek Schlawack.
-- python-config now supports multiple options on the same command line.
+- Issue #1785: Fix inspect and pydoc with misbehaving descriptors.
-- Issue #8509: Fix quoting in help strings and code snippets in configure.in.
+- Issue #13637: "a2b" functions in the binascii module now accept ASCII-only
+ unicode strings.
-- Issue #8510: Update to autoconf2.65.
+- Issue #13634: Add support for querying and disabling SSL compression.
-Documentation
--------------
+- Issue #13627: Add support for SSL Elliptic Curve-based Diffie-Hellman
+ key exchange, through the SSLContext.set_ecdh_curve() method and the
+ ssl.OP_SINGLE_ECDH_USE option.
-- Issue #9817: Add expat COPYING file; add expat, libffi and expat licenses
- to Doc/license.rst.
+- Issue #13635: Add ssl.OP_CIPHER_SERVER_PREFERENCE, so that SSL servers
+ choose the cipher based on their own preferences, rather than on the
+ client's.
-- Issue #9524: Document that two CTRL* signals are meant for use only
- with os.kill.
+- Issue #11813: Fix inspect.getattr_static for modules. Patch by Andreas
+ Stührk.
-- Issue #9255: Document that the 'test' package is meant for internal Python use
- only.
+- Issue #7502: Fix equality comparison for DocTestCase instances. Patch by
+ Cédric Krier.
-- A small WSGI server was added as Tools/scripts/serve.py, and is used to
- implement a local documentation server via 'make serve' in the doc directory.
+- Issue #11870: threading: Properly reinitialize threads internal locks and
+ condition variables to avoid deadlocks in child processes.
-- Updating `Using Python` documentation to include description of CPython's -J
- and -X options.
+- Issue #8035: urllib: Fix a bug where the client could remain stuck after a
+ redirection or an error.
-- Document that importing a module that has None in sys.modules triggers an
- ImportError.
+- Issue #13560: os.strerror() now uses the current locale encoding instead of
+ UTF-8.
-- Issue #6556: Fixed the Distutils configuration files location explanation for
- Windows.
+- Issue #8373: The filesystem path of AF_UNIX sockets now uses the filesystem
+ encoding and the surrogateescape error handler, rather than UTF-8. Patch
+ by David Watson.
-- Update python manual page (options -B, -O0, -s, environment variables
- PYTHONDONTWRITEBYTECODE, PYTHONNOUSERSITE).
+- Issue #10350: Read and save errno before calling a function which might
+ overwrite it. Original patch by Hallvard B Furuseth.
-- Issue #8909: Added the size of the bitmap used in the installer created by
- distutils' bdist_wininst. Patch by Anatoly Techtonik.
+- Issue #11610: Introduce a more general way to declare abstract properties.
-Tests
------
+- Issue #13591: A bug in importlib has been fixed that caused import_module
+ to load a module twice.
-- Issue #9251: test_threaded_import didn't fail when run through regrtest if the
- import lock was disabled.
+- Issue #4625: If IDLE cannot write to its recent file or breakpoint files,
+ display a message popup and continue rather than crash. Original patch by
+ Roger Serwy.
-- Issue #8605: Skip test_gdb if Python is compiled with optimizations.
+- Issue #13449 sched.scheduler.run() method has a new "blocking" parameter which
+ when set to False makes run() execute the scheduled events due to expire
+ soonest (if any) and then return. Patch by Giampaolo Rodolà.
-- Issue #7449: Skip test_socketserver if threading support is disabled.
+- Issue #8684 sched.scheduler class can be safely used in multi-threaded
+ environments. Patch by Josiah Carlson and Giampaolo Rodolà.
-- Issue #8672: Add a zlib test ensuring that an incomplete stream can be handled
- by a decompressor object without errors (it returns incomplete uncompressed
- data).
+- Alias resource.error to OSError ala PEP 3151.
-- Issue #8533: regrtest uses backslashreplace error handler for stdout to avoid
- UnicodeEncodeError (write non-ASCII character to stdout using ASCII encoding).
+- Issue #5689: Add support for lzma compression to the tarfile module.
-- Issue #8576: Remove use of find_unused_port() in test_smtplib and
- test_multiprocessing. Patch by Paul Moore.
+- Issue #13248: Turn 3.2's PendingDeprecationWarning into 3.3's
+ DeprecationWarning. It covers 'cgi.escape', 'importlib.abc.PyLoader',
+ 'importlib.abc.PyPycLoader', 'nntplib.NNTP.xgtitle', 'nntplib.NNTP.xpath',
+ and private attributes of 'smtpd.SMTPChannel'.
-- Issue #7449: Fix many tests to support Python compiled without thread
- support. Patches written by Jerry Seutter.
+- Issue #5905, #13560: time.strftime() is now using the current locale
+ encoding, instead of UTF-8, if the wcsftime() function is not available.
-- Issue #8108: test_ftplib's non-blocking SSL server now has proper handling of
- SSL shutdowns.
+- Issue #8641: Update IDLE 3 syntax coloring to recognize b".." and not u"..".
+ Patch by Tal Einat.
-- Issues #8279, #8330, #8437, #8480, #8495: Fix test_gdb failures, patch written
- by Dave Malcolm.
+- Issue #13464: Add a readinto() method to http.client.HTTPResponse. Patch
+ by Jon Kuhn.
-- Issue #3864: Skip three test_signal tests on freebsd6 because they fail if any
- thread was previously started, most likely due to a platform bug.
+- tarfile.py: Correctly detect bzip2 compressed streams with blocksizes
+ other than 900k.
-- Issue #8193: Fix test_zlib failure with zlib 1.2.4.
+- Issue #13439: Fix many errors in turtle docstrings.
-- Issue #8248: Add some tests for the bool type. Patch by Gregory Nofi.
+- Issue #6715: Add a module 'lzma' for compression using the LZMA algorithm.
+ Thanks to Per Øyvind Karlsen for the initial implementation.
-- Issue #8263: Now regrtest.py will report a failure if it receives a
- KeyboardInterrupt (SIGINT).
+- Issue #13487: Make inspect.getmodule robust against changes done to
+ sys.modules while it is iterating over it.
-- Issue #8180 and #8207: Fix test_pep277 on OS X and add more tests for special
- Unicode normalization cases.
+- Issue #12618: Fix a bug that prevented py_compile from creating byte
+ compiled files in the current directory. Initial patch by Sjoerd de Vries.
-- Issue #7783: test.support.open_urlresource invalidates the outdated files from
- the local cache.
+- Issue #13444: When stdout has been closed explicitly, we should not attempt
+ to flush it at shutdown and print an error.
-- Issue #7849: Now the utility ``check_warnings`` verifies if the warnings are
- effectively raised.
+- Issue #12567: The curses module uses Unicode functions for Unicode arguments
+ when it is linked to the ncurses library. It encodes also Unicode strings to
+ the locale encoding instead of UTF-8.
-- The four path modules (genericpath, macpath, ntpath, posixpath) share a common
- TestCase for some tests: test_genericpath.CommonTest.
+- Issue #12856: Ensure child processes do not inherit the parent's random
+ seed for filename generation in the tempfile module. Patch by Brian
+ Harring.
-- Print platform information when running the whole test suite, or using the
- --verbose flag.
+- Issue #9957: SpooledTemporaryFile.truncate() now accepts an optional size
+ parameter, as other file-like objects. Patch by Ryan Kelly.
-- Issue #767675: enable test_pep277 on POSIX platforms with Unicode-friendly
- filesystem encoding.
+- Issue #13458: Fix a memory leak in the ssl module when decoding a
+ certificate with a subjectAltName. Patch by Robert Xiao.
-- Issue #6292: for the moment at least, the test suite runs cleanly if python is
- run with the -OO flag. Tests requiring docstrings are skipped.
+- Issue #13415: os.unsetenv() doesn't ignore errors anymore.
-- Issue #7712: test.support gained a new `temp_cwd` context manager which is now
- also used by regrtest to run all the tests in a temporary directory. The
- original CWD is saved in `support.SAVEDCWD`. Thanks to Florent Xicluna who
- helped with the patch.
+- Issue #13245: sched.scheduler class constructor's timefunc and
+ delayfunct parameters are now optional.
+ scheduler.enter and scheduler.enterabs methods gained a new kwargs parameter.
+ Patch contributed by Chris Clark.
-- Issue #7924: Fix an intermittent 'XXX undetected error' failure in test_capi
- (only seen so far on platforms where the curses module wasn't built), due to
- an uncleared exception.
+- Issue #12328: Under Windows, refactor handling of Ctrl-C events and
+ make _multiprocessing.win32.WaitForMultipleObjects interruptible when
+ the wait_flag parameter is false. Patch by sbt.
-- Issue #7728: test_timeout was changed to use support.bind_port instead of a
- hard coded port.
+- Issue #13322: Fix BufferedWriter.write() to ensure that BlockingIOError is
+ raised when the wrapped raw file is non-blocking and the write would block.
+ Previous code assumed that the raw write() would raise BlockingIOError, but
+ RawIOBase.write() is defined to returned None when the call would block.
+ Patch by sbt.
-- Issue #7376: Instead of running a self-test (which was failing) when called
- with no arguments, doctest.py now gives a usage message.
+- Issue #13358: HTMLParser now calls handle_data only once for each CDATA.
-- Issue #7396: fix regrtest -s, which was broken by the -j enhancement.
+- Issue #4147: minidom's toprettyxml no longer adds whitespace around a text
+ node when it is the only child of an element. Initial patch by Dan
+ Kenigsberg.
-- Issue #7498: test_multiprocessing now uses test.support.find_unused_port
- instead of a hardcoded port number in test_rapid_restart.
+- Issue #13374: The Windows bytes API has been deprecated in the os module. Use
+ Unicode filenames instead of bytes filenames to not depend on the ANSI code
+ page anymore and to support any filename.
-- Issue #7431: Use TESTFN in test_linecache instead of trying to create a file
- in the Lib/test directory, which might be read-only for the user running the
- tests.
+- Issue #13297: Use bytes type to send and receive binary data through XMLRPC.
-- Issue #7324: Add a sanity check to regrtest argument parsing to catch the case
- of an option with no handler.
+- Issue #6397: Support "/dev/poll" polling objects in select module,
+ under Solaris & derivatives.
-- Issue #7312: Add a -F flag to run the selected tests in a loop until a test
- fails. Can be combined with -j.
+- Issues #1745761, #755670, #13357, #12629, #1200313: HTMLParser now correctly
+ handles non-valid attributes, including adjacent and unquoted attributes.
-- Issue #6551: test_zipimport could import and then destroy some modules of the
- encodings package, which would make other tests fail further down the road
- because the internally cached encoders and decoders would point to empty
- global variables.
+- Issue #13193: Fix distutils.filelist.FileList and packaging.manifest.Manifest
+ under Windows.
-- Issue #7295: Do not use a hardcoded file name in test_tarfile.
+- Issue #13384: Remove unnecessary __future__ import in Lib/random.py
-- Issue #7270: Add some dedicated unit tests for multi-thread synchronization
- primitives such as Lock, RLock, Condition, Event and Semaphore.
+- Issue #13149: Speed up append-only StringIO objects.
-- Issue #7248 (part 2): Use a unique temporary directory for importlib source
- tests instead of tempfile.tempdir. This prevents the tests from sharing state
- between concurrent executions on the same system.
+- Issue #13373: multiprocessing.Queue.get() could sometimes block indefinitely
+ when called with a timeout. Patch by Arnaud Ysmal.
-- Issue #7248: In importlib.test.source.util a try/finally block did not make
- sure that some referenced objects actually were created in the block before
- calling methods on the object.
+- Issue #13254: Fix Maildir initialization so that maildir contents
+ are read correctly.
-- Issue #7222: Make thread "reaping" more reliable so that reference
- leak-chasing test runs give sensible results. The previous method of reaping
- threads could return successfully while some Thread objects were still
- referenced. This also introduces a new private function:
- :func:`_thread._count()`.
+- Issue #3067: locale.setlocale() now raises TypeError if the second
+ argument is an invalid iterable. Its documentation and docstring
+ were also updated. Initial patch by Jyrki Pulliainen.
-- Issue #7151: Fixed regrtest -j so that output to stderr from a test no longer
- runs the risk of causing the worker thread to fail.
+- Issue #13140: Fix the daemon_threads attribute of ThreadingMixIn.
-- Issue #7055: test___all__ now greedily detects all modules which have an
- __all__ attribute, rather than using a hardcoded and incomplete list.
+- Issue #13339: Fix compile error in posixmodule.c due to missing semicolon.
+ Thanks to Robert Xiao.
-- Issue #7058: Added save/restore for things like sys.argv and cwd to
- runtest_inner in regrtest, with warnings if the called test modifies them, and
- a new section in the summary report at the end.
+- Byte compilation in packaging is now isolated from the calling Python -B or
+ -O options, instead of being disallowed under -B or buggy under -O.
-- Issue #7042: Fix test_signal (test_itimer_virtual) failure on OS X 10.6.
+- Issue #10570: curses.putp() and curses.tparm() are now expecting a byte
+ string, instead of a Unicode string.
-- Fixed tests in importlib.test.source.test_abc_loader that were masking the
- proper exceptions that should be raised for missing or improper code object
- bytecode.
+- Issue #13295: http.server now produces valid HTML 4.01 strict.
-- Removed importlib's custom test discovery code and switched to
- unittest.TestLoader.discover().
+- Issue #2892: preserve iterparse events in case of SyntaxError.
-Tools/Demos
------------
+- Issue #13287: urllib.request and urllib.error now contains an __all__
+ attribute to expose only relevant classes and functions. Patch by Florent
+ Xicluna.
-- Issue #5464, #8974: Implement plural forms in msgfmt.py.
+- Issue #670664: Fix HTMLParser to correctly handle the content of
+ ``<script>...</script>`` and ``<style>...</style>``.
-- iobench (a file I/O benchmark) and ccbench (a concurrency benchmark) were
- added to the `Tools/` directory. They were previously living in the sandbox.
+- Issue #10817: Fix urlretrieve function to raise ContentTooShortError even
+ when reporthook is None. Patch by Jyrki Pulliainen.
+- Issue #13296: Fix IDLE to clear compile __future__ flags on shell restart.
+ (Patch by Roger Serwy)
-What's New in Python 3.1?
-=========================
+- Fix the xmlrpc.client user agent to return something similar to
+ urllib.request user agent: "Python-xmlrpc/3.3".
-*Release date: 27-June-2009*
+- Issue #13293: Better error message when trying to marshal bytes using
+ xmlrpc.client.
-Core and Builtins
------------------
+- Issue #13291: NameError in xmlrpc package.
-- Issue #6334: Fix bug in range length calculation for ranges with
- large arguments.
+- Issue #13258: Use callable() built-in in the standard library.
-- Issue #6329: Fixed iteration for memoryview objects (it was being blocked
- because it wasn't recognized as a sequence).
+- Issue #13273: fix a bug that prevented HTMLParser to properly detect some
+ tags when strict=False.
-Library
--------
+- Issue #11183: Add finer-grained exceptions to the ssl module, so that
+ you don't have to inspect the exception's attributes in the common case.
-- Issue #6126: Fixed pdb command-line usage.
+- Issue #13216: Add cp65001 codec, the Windows UTF-8 (CP_UTF8).
-- Issue #6314: logging: performs extra checks on the "level" argument.
+- Issue #13226: Add RTLD_xxx constants to the os module. These constants can be
+ used with sys.setdlopenflags().
-- Issue #6274: Fixed possible file descriptors leak in subprocess.py
+- Issue #10278: Add clock_getres(), clock_gettime() and CLOCK_xxx constants to
+ the time module. time.clock_gettime(time.CLOCK_MONOTONIC) provides a
+ monotonic clock
-- Accessing io.StringIO.buffer now raises an AttributeError instead of
- io.UnsupportedOperation.
+- Issue #10332: multiprocessing: fix a race condition when a Pool is closed
+ before all tasks have completed.
-- Issue #6271: mmap tried to close invalid file handle (-1) when anonymous.
- (On Unix)
+- Issue #13255: wrong docstrings in array module.
-- Issue #1202: zipfile module would cause a struct.error when attempting to
- store files with a CRC32 > 2**31-1.
+- Issue #8540: Remove deprecated Context._clamp attribute in Decimal module.
-Extension Modules
------------------
+- Issue #13235: Added DeprecationWarning to logging.warn() method and function.
-- Issue #5590: Remove unused global variable in pyexpat extension.
+- Issue #9168: now smtpd is able to bind privileged port.
+- Issue #12529: fix cgi.parse_header issue on strings with double-quotes and
+ semicolons together. Patch by Ben Darnell and Petri Lehtinen.
-What's New in Python 3.1 Release Candidate 2?
-=============================================
+- Issue #13227: functools.lru_cache() now has a option to distinguish
+ calls with different argument types.
-*Release date: 13-June-2009*
+- Issue #6090: zipfile raises a ValueError when a document with a timestamp
+ earlier than 1980 is provided. Patch contributed by Petri Lehtinen.
-Core and Builtins
------------------
+- Issue #13150: sysconfig no longer parses the Makefile and config.h files
+ when imported, instead doing it at build time. This makes importing
+ sysconfig faster and reduces Python startup time by 20%.
-- Fixed SystemError triggered by "range([], 1, -1)".
+- Issue #12448: smtplib now flushes stdout while running ``python -m smtplib``
+ in order to display the prompt correctly.
-- Issue #5924: On Windows, a large PYTHONPATH environment variable
- (more than 255 characters) would be completely ignored.
+- Issue #12454: The mailbox module is now using ASCII, instead of the locale
+ encoding, to read and write .mh_sequences files.
-- Issue #4547: When debugging a very large function, it was not always
- possible to update the lineno attribute of the current frame.
+- Issue #13194: zlib.compressobj().copy() and zlib.decompressobj().copy() are
+ now available on Windows.
-- Issue #5330: C functions called with keyword arguments were not reported by
- the various profiling modules (profile, cProfile). Patch by Hagen Fürstenau.
+- Issue #1673007: urllib.request now supports HEAD request via new method argument.
+ Patch contributions by David Stanek, Patrick Westerhoff and Ezio Melotti.
-Library
--------
+- Issue #12386: packaging does not fail anymore when writing the RESOURCES
+ file.
-- Issue #6438: Fixed distutils.cygwinccompiler.get_versions : the regular
- expression string pattern was trying to match against a bytes returned by
- Popen. Tested under win32 to build the py-postgresql project.
+- Issue #13158: Fix decoding and encoding of GNU tar specific base-256 number
+ fields in tarfile.
-- Issue #6258: Support AMD64 in bdist_msi.
+- Issue #13025: mimetypes is now reading MIME types using the UTF-8 encoding,
+ instead of the locale encoding.
-- Issue #6195: fixed doctest to no longer try to read 'source' data from
- binary files.
+- Issue #10653: On Windows, use strftime() instead of wcsftime() because
+ wcsftime() doesn't format time zone correctly.
-- Issue #5262: Fixed bug in next rollover time computation in
- TimedRotatingFileHandler.
+- Issue #13150: The tokenize module doesn't compile large regular expressions
+ at startup anymore.
-- Issue #6217: The C implementation of io.TextIOWrapper didn't include the
- errors property. Additionally, the errors and encoding properties of StringIO
- are always None now.
+- Issue #11171: Fix distutils.sysconfig.get_makefile_filename when Python was
+ configured with different prefix and exec-prefix.
-- Issue #6137: The pickle module now translates module names when loading
- or dumping pickles with a 2.x-compatible protocol, in order to make data
- sharing and migration easier. This behaviour can be disabled using the
- new `fix_imports` optional argument.
+- Issue #11254: Teach distutils and packaging to compile .pyc and .pyo files in
+ PEP 3147-compliant __pycache__ directories.
-- Removed the ipaddr module.
+- Issue #7367: Fix pkgutil.walk_paths to skip directories whose
+ contents cannot be read.
-- Issue #3613: base64.{encode,decode}string are now called
- base64.{encode,decode}bytes which reflects what type they accept and return.
- The old names are still there as deprecated aliases.
+- Issue #3163: The struct module gets new format characters 'n' and 'N'
+ supporting C integer types ``ssize_t`` and ``size_t``, respectively.
-- Issue #5767: Remove sgmlop support from xmlrpc.client.
+- Issue #13099: Fix sqlite3.Cursor.lastrowid under a Turkish locale.
+ Reported and diagnosed by Thomas Kluyver.
-- Issue #6150: Fix test_unicode on wide-unicode builds.
+- Issue #13087: BufferedReader.seek() now always raises UnsupportedOperation
+ if the underlying raw stream is unseekable, even if the seek could be
+ satisfied using the internal buffer. Patch by John O'Connor.
-- Issue #6149: Fix initialization of WeakValueDictionary objects from non-empty
- parameters.
+- Issue #7689: Allow pickling of dynamically created classes when their
+ metaclass is registered with copyreg. Patch by Nicolas M. Thiéry and Craig
+ Citro.
-Windows
--------
+- Issue #13034: When decoding some SSL certificates, the subjectAltName
+ extension could be unreported.
-- Issue #6221: Delete test registry key before running the test.
+- Issue #9871: Prevent IDLE 3 crash when given byte stings
+ with invalid hex escape sequences, like b'\x0'.
+ (Original patch by Claudiu Popa.)
-- Issue #6158: Package Sine-1000Hz-300ms.aif in MSI file.
+- Issue #12306: Expose the runtime version of the zlib C library as a constant,
+ ZLIB_RUNTIME_VERSION, in the zlib module. Patch by Torsten Landschoff.
-C-API
------
+- Issue #12959: Add collections.ChainMap to collections.__all__.
-- Issue #5735: Python compiled with --with-pydebug should throw an
- ImportError when trying to import modules compiled without
- --with-pydebug, and vice-versa.
+- Issue #8933: distutils' PKG-INFO files and packaging's METADATA files will
+ now correctly report Metadata-Version: 1.1 instead of 1.0 if a Classifier or
+ Download-URL field is present.
+- Issue #12567: Add curses.unget_wch() function. Push a character so the next
+ get_wch() will return it.
-Build
------
+- Issue #9561: distutils and packaging now writes egg-info files using UTF-8,
+ instead of the locale encoding.
-- Issue #6154: Make sure the intl library is added to LIBS if needed. Also
- added LIBS to OS X framework builds.
+- Issue #8286: The distutils command sdist will print a warning message instead
+ of crashing when an invalid path is given in the manifest template.
-- Issue #5809: Specifying both --enable-framework and --enable-shared is
- an error. Configure now explicity tells you about this.
+- Issue #12841: tarfile unnecessarily checked the existence of numerical user
+ and group ids on extraction. If one of them did not exist the respective id
+ of the current user (i.e. root) was used for the file and ownership
+ information was lost.
+- Issue #12888: Fix a bug in HTMLParser.unescape that prevented it to escape
+ more than 128 entities. Patch by Peter Otten.
+- Issue #12878: Expose a __dict__ attribute on io.IOBase and its subclasses.
-What's New in Python 3.1 release candidate 1?
-=============================================
+- Issue #12636: IDLE reads the coding cookie when executing a Python script.
-*Release date: 2009-05-30*
+- Issue #12494: On error, call(), check_call(), check_output() and
+ getstatusoutput() functions of the subprocess module now kill the process,
+ read its status (to avoid zombis) and close pipes.
-Core and Builtins
------------------
+- Issue #12720: Expose low-level Linux extended file attribute functions in os.
-- Issue #6097: Escape UTF-8 surrogates resulting from mbstocs conversion
- of the command line.
+- Issue #10946: The distutils commands bdist_dumb, bdist_wininst and bdist_msi
+ now respect a --skip-build option given to bdist. The packaging commands
+ were fixed too.
-- Issue #6012: Add cleanup support to O& argument parsing.
+- Issue #12847: Fix a crash with negative PUT and LONG_BINPUT arguments in
+ the C pickle implementation.
-- Issue #6089: Fixed str.format with certain invalid field specifiers
- that would raise SystemError.
+- Issue #11564: Avoid crashes when trying to pickle huge objects or containers
+ (more than 2**31 items). Instead, in most cases, an OverflowError is raised.
-- Issue #5982: staticmethod and classmethod now expose the wrapped
- function with __func__.
+- Issue #12287: Fix a stack corruption in ossaudiodev module when the FD is
+ greater than FD_SETSIZE.
-- Added support for multiple context managers in the same with-statement.
- Deprecated contextlib.nested() which is no longer needed.
+- Issue #12839: Fix crash in zlib module due to version mismatch.
+ Fix by Richard M. Tew.
-- Issue #5829: complex("1e500") no longer raises OverflowError. This
- makes it consistent with float("1e500") and interpretation of real
- and imaginary literals.
+- Issue #9923: The mailcap module now correctly uses the platform path
+ separator for the MAILCAP environment variable on non-POSIX platforms.
-- Issue #3527: Removed Py_WIN_WIDE_FILENAMES which is not used any more.
+- Issue #12835: Follow up to #6560 that unconditionally prevents use of the
+ unencrypted sendmsg/recvmsg APIs on SSL wrapped sockets. Patch by David
+ Watson.
-- Issue #5994: the marshal module now has docstrings.
+- Issue #12803: SSLContext.load_cert_chain() now accepts a password argument
+ to be used if the private key is encrypted. Patch by Adam Simpkins.
-- Issue #5981: Fix three minor inf/nan issues in float.fromhex:
- (1) inf and nan strings with trailing whitespace were incorrectly
- rejected; (2) parsing of strings representing infinities and nans
- was locale aware; and (3) the interpretation of fromhex('-nan')
- didn't match that of float('-nan').
+- Issue #11657: Fix sending file descriptors over 255 over a multiprocessing
+ Pipe.
-Library
--------
+- Issue #12811: tabnanny.check() now promptly closes checked files. Patch by
+ Anthony Briggs.
-- Issue #4859: Implement PEP 383 for pwd, spwd, and grp.
+- Issue #6560: The sendmsg/recvmsg API is now exposed by the socket module
+ when provided by the underlying platform, supporting processing of
+ ancillary data in pure Python code. Patch by David Watson and Heiko Wundram.
-- smtplib 'login' and 'cram-md5' login are also fixed (see Issue #5259).
+- Issue #12326: On Linux, sys.platform doesn't contain the major version
+ anymore. It is now always 'linux', instead of 'linux2' or 'linux3' depending
+ on the Linux version used to build Python.
-- Issue #6121: pydoc now ignores leading and trailing spaces in the
- argument to the 'help' function.
+- Issue #12213: Fix a buffering bug with interleaved reads and writes that
+ could appear on BufferedRandom streams.
-- Issue #6118: urllib.parse.quote_plus ignored the encoding and errors
- arguments for strings with a space in them.
+- Issue #12778: Reduce memory consumption when JSON-encoding a large
+ container of many small objects.
-- collections.namedtuple() was not working with the following field
- names: cls, self, tuple, itemgetter, and property.
+- Issue #12650: Fix a race condition where a subprocess.Popen could leak
+ resources (FD/zombie) when killed at the wrong time.
-- In unittest, using a skipping decorator on a class is now equivalent to
- skipping every test on the class. The ClassTestSuite class has been removed.
+- Issue #12744: Fix inefficient representation of integers between 2**31 and
+ 2**63 on systems with a 64-bit C "long".
-- Issue #6050: Don't fail extracting a directory from a zipfile if
- the directory already exists.
+- Issue #12646: Add an 'eof' attribute to zlib.Decompress, to make it easier to
+ detect truncated input streams.
-- Issue #1309352: fcntl now converts its third arguments to a C `long` rather
- than an int, which makes some operations possible under 64-bit Linux (e.g.
- DN_MULTISHOT with F_NOTIFY).
+- Issue #11513: Fix exception handling ``tarfile.TarFile.gzopen()`` when
+ the file cannot be opened.
-- Issue #5761: Add the name of the underlying file to the repr() of various
- IO objects.
+- Issue #12687: Fix a possible buffering bug when unpickling text mode
+ (protocol 0, mostly) pickles.
-- Issue #5259: smtplib plain auth login no longer gives a traceback. Fix
- by Musashi Tamura, tests by Marcin Bachry.
+- Issue #10087: Fix the html output format of the calendar module.
-- Issue #1983: Fix functions taking or returning a process identifier to use
- the dedicated C type ``pid_t`` instead of a C ``int``. Some platforms have
- a process identifier type wider than the standard C integer type.
+- Issue #12540: Prevent zombie IDLE processes on Windows due to changes
+ in os.kill().
-- Issue #4066: smtplib.SMTP_SSL._get_socket now correctly returns the socket.
- Patch by Farhan Ahmad, test by Marcin Bachry.
+- Issue #13121: add support for inplace math operators to collections.Counter.
-- Issue #2116: Weak references and weak dictionaries now support copy()ing and
- deepcopy()ing.
+- Add support for unary plus and unary minus to collections.Counter.
-- Issue #1655: Make imaplib IPv6-capable. Patch by Derek Morr.
+- Issue #12683: urlparse updated to include svn as schemes that uses relative
+ paths. (svn from 1.5 onwards support relative path).
-- Issue #5918: Fix a crash in the parser module.
+- Issue #12655: Expose functions from sched.h in the os module: sched_yield(),
+ sched_setscheduler(), sched_getscheduler(), sched_setparam(),
+ sched_get_min_priority(), sched_get_max_priority(), sched_rr_get_interval(),
+ sched_getaffinity(), sched_setaffinity().
-- Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.
+- Add ThreadError to threading.__all__.
-- Issue #5006: Better handling of unicode byte-order marks (BOM) in the io
- library. This means, for example, that opening an UTF-16 text file in
- append mode doesn't add a BOM at the end of the file if the file isn't
- empty.
+- Issues #11104, #8688: Fix the behavior of distutils' sdist command with
+ manually-maintained MANIFEST files.
-- Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
- file is a binary. Patch by Brodie Rao, tests by Daniel Diniz. This fix
- corrects a pydoc regression.
+- Issue #11281: smtplib.STMP gets source_address parameter, which adds the
+ ability to bind to specific source address on a machine with multiple
+ interfaces. Patch by Paulo Scardine.
-- Issue #5955: aifc's close method did not close the file it wrapped,
- now it does. This also means getfp method now returns the real fp.
+- Issue #12464: tempfile.TemporaryDirectory.cleanup() should not follow
+ symlinks: fix it. Patch by Petri Lehtinen.
-Installation
-------------
+- Issue #8887: "pydoc somebuiltin.somemethod" (or help('somebuiltin.somemethod')
+ in Python code) now finds the doc of the method.
-- Issue #6047: fullinstall has been removed because Python 3's executable will
- now be known as python3.
+- Issue #10968: Remove indirection in threading. The public names (Event,
+ Condition, etc.) used to be factory functions returning instances of hidden
+ classes (_Event, _Condition, etc.), because (if Guido recalls correctly) this
+ code pre-dates the ability to subclass extension types. It is now possible
+ to inherit from these classes, without having to import the private
+ underscored names like multiprocessing did.
-- Lib/smtpd.py is no longer installed as a script.
+- Issue #9723: Add shlex.quote functions, to escape filenames and command
+ lines.
-Extension Modules
------------------
+- Issue #12603: Fix pydoc.synopsis() on files with non-negative st_mtime.
-- Issue #3061: Use wcsftime for time.strftime where available.
+- Issue #12514: Use try/finally to assure the timeit module restores garbage
+ collections when it is done.
-- Issue #4873: Fix resource leaks in error cases of pwd and grp.
+- Issue #12607: In subprocess, fix issue where if stdin, stdout or stderr is
+ given as a low fd, it gets overwritten.
-- Issue #6093: Fix off-by-one error in locale.strxfrm.
+- Issue #12590: IDLE editor window now always displays the first line
+ when opening a long file. With Tk 8.5, the first line was hidden.
-- The _functools and _locale modules are now built into the libpython shared
- library instead of as extension modules.
+- Issue #12576: Fix urlopen behavior on sites which do not send (or obfuscates)
+ Connection:close header.
-Build
------
+- Issue #12102: Document that buffered files must be flushed before being used
+ with mmap. Patch by Steffen Daode Nurpmeso.
-- Issue #3585: Add pkg-config support. It creates a python-2.7.pc file
- and a python3.pc symlink in the $(LIBDIR)/pkgconfig directory. Patch by
- Clinton Roy.
+- Issue #12560: Build libpython.so on OpenBSD. Patch by Stefan Sperling.
-Tests
------
+- Issue #1813: Fix codec lookup under Turkish locales.
-- Issue #5442: Tests for importlib were not properly skipping case-sensitivity
- tests on darwin even when the OS was installed on a case-sensitive
- filesystem. Also fixed tests that should not be run when
- sys.dont_write_bytecode is true.
+- Issue #12591: Improve support of "universal newlines" in the subprocess
+ module: the piped streams can now be properly read from or written to.
+- Issue #12591: Allow io.TextIOWrapper to work with raw IO objects (without
+ a read1() method), and add a *write_through* parameter to mandate
+ unbuffered writes.
-What's New in Python 3.1 beta 1?
-================================
+- Issue #10883: Fix socket leaks in urllib.request when using FTP.
-*Release date: 2009-05-06*
+- Issue #12592: Make Python build on OpenBSD 5 (and future major releases).
-Core and Builtins
------------------
+- Issue #12372: POSIX semaphores are broken on AIX: don't use them.
-- Issue #5914: Add new C API function PyOS_string_to_double, and
- deprecate PyOS_ascii_strtod and PyOS_ascii_atof.
+- Issue #12551: Provide a get_channel_binding() method on SSL sockets so as
+ to get channel binding data for the current SSL session (only the
+ "tls-unique" channel binding is implemented). This allows the implementation
+ of certain authentication mechanisms such as SCRAM-SHA-1-PLUS. Patch by
+ Jacek Konieczny.
-- Issue #3382: float.__format__, complex.__format__, and %-formatting
- no longer map 'F' to 'f'. Because of issue #5859 (below), this only
- affects nan -> NAN and inf -> INF.
+- Issue #665194: email.utils now has format_datetime and parsedate_to_datetime
+ functions, allowing for round tripping of RFC2822 format dates.
-- Issue #5799: ntpath (ie, os.path on Windows) fully supports UNC pathnames
- in all operations, including splitdrive, split, etc. splitunc() now issues
- a PendingDeprecation warning.
+- Issue #12571: Add a plat-linux3 directory mirroring the plat-linux2
+ directory, so that "import DLFCN" and other similar imports work on
+ Linux 3.0.
-- Issue #5920: For float.__format__, change the behavior with the
- empty presentation type (that is, not one of 'e', 'f', 'g', or 'n')
- to be like 'g' but with at least one decimal point and with a
- default precision of 12. Previously, the behavior the same but with
- a default precision of 6. This more closely matches str(), and
- reduces surprises when adding alignment flags to the empty
- presentation type. This also affects the new complex.__format__ in
- the same way.
+- Issue #7484: smtplib no longer puts <> around addresses in VRFY and EXPN
+ commands; they aren't required and in fact postfix doesn't support that form.
-- Implement PEP 383, Non-decodable Bytes in System Character Interfaces.
+- Issue #12273: Remove ast.__version__. AST changes can be accounted for by
+ checking sys.version_info or sys._mercurial.
-- Issue #5890: in subclasses of 'property' the __doc__ attribute was
- shadowed by classtype's, even if it was None. property now
- inserts the __doc__ into the subclass instance __dict__.
+- Silence spurious "broken pipe" tracebacks when shutting down a
+ ProcessPoolExecutor.
-- Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
- sequences. Patch by Nick Barnes and Victor Stinner.
+- Fix potential resource leaks in concurrent.futures.ProcessPoolExecutor
+ by joining all queues and processes when shutdown() is called.
-- Issue #3672: Reject surrogates in utf-8 codec; add surrogatepass error handler.
+- Issue #11603: Fix a crash when __str__ is rebound as __repr__. Patch by
+ Andreas Stührk.
-- Issue #5883: In the io module, the BufferedIOBase and TextIOBase ABCs have
- received a new method, detach(). detach() disconnects the underlying stream
- from the buffer or text IO and returns it.
+- Issue #11321: Fix a crash with multiple imports of the _pickle module when
+ embedding Python. Patch by Andreas Stührk.
-- Issue #5859: Remove switch from '%f' to '%g'-style formatting for
- floats with absolute value over 1e50. Also remove length
- restrictions for float formatting: '%.67f' % 12.34 and '%.120e' %
- 12.34 no longer raise an exception.
+- Issue #6755: Add get_wch() method to curses.window class. Patch by Iñigo
+ Serna.
-- Issue #1588: Add complex.__format__. For example,
- format(complex(1, 2./3), '.5') now produces a sensible result.
+- Add cgi.closelog() function to close the log file.
-- Issue #5864: Fix empty format code formatting for floats so that it
- never gives more than the requested number of significant digits.
+- Issue #12502: asyncore: fix polling loop with AF_UNIX sockets.
-- Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
- new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.
+- Issue #4376: ctypes now supports nested structures in a endian different than
+ the parent structure. Patch by Vlad Riscutia.
-- Issue #5835: Deprecate PyOS_ascii_formatd.
+- Raise ValueError when attempting to set the _CHUNK_SIZE attribute of a
+ TextIOWrapper to a huge value, not TypeError.
-- Issue #4971: Fix titlecase for characters that are their own
- titlecase, but not their own uppercase.
+- Issue #12504: Close file handles in a timely manner in packaging.database.
+ This fixes a bug with the remove (uninstall) feature on Windows.
-- Issue #5283: Setting __class__ in __del__ caused a segfault.
+- Issues #12169 and #10510: Factor out code used by various packaging commands
+ to make HTTP POST requests, and make sure it uses CRLF.
-- Issue #5816: complex(repr(z)) now recovers z exactly, even when
- z involves nans, infs or negative zeros.
+- Issue #12016: Multibyte CJK decoders now resynchronize faster. They only
+ ignore the first byte of an invalid byte sequence. For example,
+ b'\xff\n'.decode('gb2312', 'replace') gives '\ufffd\n' instead of '\ufffd'.
-- Issue #3166: Make int -> float conversions correctly rounded.
+- Issue #12459: time.sleep() now raises a ValueError if the sleep length is
+ negative, instead of an infinite sleep on Windows or raising an IOError on
+ Linux for example, to have the same behaviour on all platforms.
-- Issue #1869 (and many duplicates): make round(x, n) correctly
- rounded for a float x, by using the decimal <-> binary conversions
- from Python/dtoa.c. As a consequence, (e.g.) round(x, 2) now
- consistently agrees with format(x, '.2f').
+- Issue #12451: pydoc: html_getfile() now uses tokenize.open() to support
+ Python scripts using a encoding different than UTF-8 (read the coding cookie
+ of the script).
-- Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
- some builtin types.
+- Issue #12493: subprocess: Popen.communicate() now also handles EINTR errors
+ if the process has only one pipe.
-- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'.
+- Issue #12467: warnings: fix a race condition if a warning is emitted at
+ shutdown, if globals()['__file__'] is None.
-- Issue #5515: str.format() type 'n' combined with commas and leading
- zeros no longer gives odd results with ints and floats.
+- Issue #12451: pydoc: importfile() now opens the Python script in binary mode,
+ instead of text mode using the locale encoding, to avoid encoding issues.
-- Implement PEP 378, Format Specifier for Thousands Separator, for
- floats.
+- Issue #12451: runpy: run_path() now opens the Python script in binary mode,
+ instead of text mode using the locale encoding, to support other encodings
+ than UTF-8 (scripts using the coding cookie).
-- The str function switches to exponential notation at
- 1e11, not 1e12. This avoids printing 13 significant digits in
- situations where only 12 of them are correct. Example problem
- value: str(1e11 + 0.5). (This minor issue has existed in 2.x for a
- long time.)
+- Issue #12451: xml.dom.pulldom: parse() now opens files in binary mode instead
+ of the text mode (using the locale encoding) to avoid encoding issues.
-- Issue #1580: On most platforms, use a 'short' float repr: for a
- finite float x, repr(x) now outputs a string based on the shortest
- sequence of decimal digits that rounds to x. Previous behaviour was
- to output 17 significant digits and then strip trailing zeros.
- Another minor difference is that the new repr switches to
- exponential notation at 1e16 instead of the previous 1e17; this
- avoids misleading output in some cases.
+- Issue #12147: Adjust the new-in-3.2 smtplib.send_message method for better
+ conformance to the RFCs: correctly handle Sender and Resent- headers.
- There's a new sys attribute sys.float_repr_style, which takes
- the value 'short' to indicate that we're using short float repr,
- and 'legacy' if the short float repr isn't available for one
- reason or another.
+- Issue #12352: Fix a deadlock in multiprocessing.Heap when a block is freed by
+ the garbage collector while the Heap lock is held.
- The float repr change involves incorporating David Gay's 'perfect
- rounding' code into the Python core (it's in Python/dtoa.c). As a
- secondary consequence, all string-to-float and float-to-string
- conversions (including all float formatting operations) will be
- correctly rounded on these platforms.
+- Issue #12462: time.sleep() now immediately calls the (Python) signal handler
+ if it is interrupted by a signal, instead of having to wait until the next
+ instruction.
- See issue #1580 discussions for details of platforms for which
- this change does not apply.
+- Issue #12442: new shutil.disk_usage function, providing total, used and free
+ disk space statistics.
-- Issue #5759: float() didn't call __float__ on str subclasses.
+- Issue #12451: The XInclude default loader of xml.etree now decodes files from
+ UTF-8 instead of the locale encoding if the encoding is not specified. It now
+ also opens XML files for the parser in binary mode instead of the text mode
+ to avoid encoding issues.
-- The string.maketrans() function is deprecated; there is a new static method
- maketrans() on the bytes and bytearray classes. This removes confusion about
- the types string.maketrans() is supposed to work with, and mirrors the
- methods available on the str class.
+- Issue #12451: doctest.debug_script() doesn't create a temporary file
+ anymore to avoid encoding issues.
-- Issue #2170: refactored xml.dom.minidom.normalize, increasing both
- its clarity and its speed.
+- Issue #12451: pydoc.synopsis() now reads the encoding cookie if available,
+ to read the Python script from the right encoding.
-- Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add ``do { ... } while (0)``
- to avoid compiler warnings.
+- Issue #12451: distutils now opens the setup script in binary mode to read the
+ encoding cookie, instead of opening it in UTF-8.
-- Issue #3739: The unicode-internal encoder now reports the number of characters
- consumed like any other encoder (instead of the number of bytes).
+- Issue #9516: On Mac OS X, change Distutils to no longer globally attempt to
+ check or set the MACOSX_DEPLOYMENT_TARGET environment variable for the
+ interpreter process. This could cause failures in non-Distutils subprocesses
+ and was unreliable since tests or user programs could modify the interpreter
+ environment after Distutils set it. Instead, have Distutils set the the
+ deployment target only in the environment of each build subprocess. It is
+ still possible to globally override the default by setting
+ MACOSX_DEPLOYMENT_TARGET before launching the interpreter; its value must be
+ greater or equal to the default value, the value with which the interpreter
+ was built. Also, implement the same handling in packaging.
-Installation
-------------
+- Issue #12422: In the copy module, don't store objects that are their own copy
+ in the memo dict.
-- Issue #5756: Install idle and pydoc with a 3 suffix.
+- Issue #12303: Add sigwaitinfo() and sigtimedwait() to the signal module.
-Library
--------
+- Issue #12404: Remove C89 incompatible code from mmap module. Patch by Akira
+ Kitada.
-- Issue #8203: Fix IDLE Credits dialog: view_file() uses its encoding argument.
+- Issue #1874: email now detects and reports as a defect the presence of
+ any CTE other than 7bit, 8bit, or binary on a multipart.
-- Issue #5311: bdist_msi can now build packages that do not depend on a
- specific Python version.
+- Issue #12383: Fix subprocess module with env={}: don't copy the environment
+ variables, start with an empty environment.
-- Issue #5150: IDLE's format menu now has an option to strip trailing
- whitespace.
+- Issue #11637: Fix support for importing packaging setup hooks from the
+ project directory.
-- Issue #5940: distutils.command.build_clib.check_library_list was not doing
- the right type checkings anymore.
+- Issue #6771: Moved the curses.wrapper function from the single-function
+ wrapper module into __init__, eliminating the module. Since __init__ was
+ already importing the function to curses.wrapper, there is no API change.
-- Issue #4875: On win32, ctypes.util.find_library does no longer
- return directories.
+- Issue #11584: email.header.decode_header no longer fails if the header
+ passed to it is a Header object, and Header/make_header no longer fail
+ if given binary unknown-8bit input.
-- Issue #5142: Add the ability to skip modules while stepping to pdb.
+- Issue #11700: mailbox proxy object close methods can now be called multiple
+ times without error.
-- Issue #1309567: Fix linecache behavior of stripping subdirectories when
- looking for files given by a relative filename.
+- Issue #11767: Correct file descriptor leak in mailbox's __getitem__ method.
-- Issue #5923: Update the ``turtle`` module to version 1.1, add two new
- turtle demos in Demo/turtle.
+- Issue #12133: AbstractHTTPHandler.do_open() of urllib.request closes the HTTP
+ connection if its getresponse() method fails with a socket error. Patch
+ written by Ezio Melotti.
-- Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
- extracting a file to the root directory.
+- Issue #12240: Allow multiple setup hooks in packaging's setup.cfg files.
+ Original patch by Erik Bray.
-- Issue #5913: os.listdir() should fail for empty path on windows.
+- Issue #9284: Allow inspect.findsource() to find the source of doctest
+ functions.
-- Issue #5084: unpickling now interns the attribute names of pickled objects,
- saving memory and avoiding growth in size of subsequent pickles. Proposal
- and original patch by Jake McGuire.
+- Issue #11595: Fix assorted bugs in packaging.util.cfg_to_args, a
+ compatibility helper for the distutils-packaging transition. Original patch
+ by Erik Bray.
-- The json module now works exclusively with str and not bytes.
+- Issue #12287: In ossaudiodev, check that the device isn't closed in several
+ methods.
-- Issue #3959: The ipaddr module has been added to the standard library.
- Contributed by Google.
+- Issue #12009: Fixed regression in netrc file comment handling.
-- Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
- error when a named pipe is encountered, rather than blocking infinitely.
+- Issue #12246: Warn and fail when trying to install a third-party project from
+ an uninstalled Python (built in a source checkout). Original patch by
+ Tshepang Lekhonkhobe.
-- Issue #5857: tokenize.tokenize() now returns named tuples.
+- Issue #10694: zipfile now ignores garbage at the end of a zipfile.
-- Issue #4305: ctypes should now build again on mipsel-linux-gnu
+- Issue #12283: Fixed regression in smtplib quoting of leading dots in DATA.
-- Issue #1734234: Massively speedup ``unicodedata.normalize()`` when the
- string is already in normalized form, by performing a quick check beforehand.
- Original patch by Rauli Ruohonen.
+- Issue #10424: Argparse now includes the names of the missing required
+ arguments in the missing arguments error message.
-- Issue #5853: calling a function of the mimetypes module from several threads
- at once could hit the recursion limit if the mimetypes database hadn't been
- initialized before.
+- Issue #12168: SysLogHandler now allows NUL termination to be controlled using
+ a new 'append_nul' attribute on the handler.
-- Issue #5854: Updated __all__ to include some missing names and remove some
- names which should not be exported.
+- Issue #11583: Speed up os.path.isdir on Windows by using GetFileAttributes
+ instead of os.stat.
-- Issue #3102: All global symbols that the _ctypes extension defines
- are now prefixed with 'Py' or '_ctypes'.
+- Issue #12021: Make mmap's read() method argument optional. Patch by Petri
+ Lehtinen.
-- Issue #5041: ctypes does now allow pickling wide character.
+- Issue #9205: concurrent.futures.ProcessPoolExecutor now detects killed
+ children and raises BrokenProcessPool in such a situation. Previously it
+ would reliably freeze/deadlock.
-- Issue #5812: For the two-argument form of the Fraction constructor,
- Fraction(m, n), m and n are permitted to be arbitrary Rational
- instances.
+- Issue #12040: Expose a new attribute ``sentinel`` on instances of
+ ``multiprocessing.Process``. Also, fix Process.join() to not use polling
+ anymore, when given a timeout.
-- Issue #5812: Fraction('1e6') is valid: more generally, any string
- that's valid for float() is now valid for Fraction(), with the
- exception of strings representing NaNs and infinities.
+- Issue #11893: Remove obsolete internal wrapper class ``SSLFakeFile`` in the
+ smtplib module. Patch by Catalin Iacob.
-- Issue #5734: BufferedRWPair was poorly tested and had several glaring
- bugs. Patch by Brian Quinlan.
+- Issue #12080: Fix a Decimal.power() case that took an unreasonably long time
+ to compute.
-- Issue #1161031: fix readwrite select flag handling: POLLPRI now
- results in a handle_expt_event call, not handle_read_event, and POLLERR
- and POLLNVAL now call handle_close, not handle_expt_event. Also,
- dispatcher now has an 'ignore_log_types' attribute for suppressing
- log messages, which is set to 'warning' by default.
+- Issue #12221: Remove __version__ attributes from pyexpat, pickle, tarfile,
+ pydoc, tkinter, and xml.parsers.expat. This were useless version constants
+ left over from the Mercurial transition
-- Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
- new arguments introduced in 2.5.
+- Named tuples now work correctly with vars().
-- Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
- makeunicodedata.py and regenerated the Unicode database (This fixes
- u'\u1d79'.lower() == '\x00').
+- Issue #12085: Fix an attribute error in subprocess.Popen destructor if the
+ constructor has failed, e.g. because of an undeclared keyword argument. Patch
+ written by Oleg Oshmyan.
-Extension Modules
------------------
+- Issue #12028: Make threading._get_ident() public, rename it to
+ threading.get_ident() and document it. This function was already used using
+ _thread.get_ident().
-- Issue #5881: Remove old undocumented compatibility interfaces in hashlib and
- pwd.
+- Issue #12171: IncrementalEncoder.reset() of CJK codecs (multibytecodec) calls
+ encreset() instead of decreset().
-- Issue #5463: In struct module, remove deprecated float coercion
- for integer type codes: struct.pack('L', 0.3) should now raise
- an error. The _PY_STRUCT_FLOAT_COERCE constant has been removed.
- The version number has been bumped to 0.3.
+- Issue #12218: Removed wsgiref.egg-info.
-- Issue #5359: Readd the Berkeley DB detection code to allow _dbm be built
- using Berkeley DB.
+- Issue #12196: Add pipe2() to the os module.
-Tests
------
+- Issue #985064: Make plistlib more resilient to faulty input plists.
+ Patch by Mher Movsisyan.
-- Issue #5354: New test support function import_fresh_module() makes
- it easy to import both normal and optimised versions of modules.
- test_heapq and test_warnings have been adjusted to use it, tests for
- other modules with both C and Python implementations in the stdlib
- can be adjusted to use it over time.
+- Issue #1625: BZ2File and bz2.decompress() now support multi-stream files.
+ Initial patch by Nir Aides.
-- Issue #5837: Certain sequences of calls to set() and unset() for
- support.EnvironmentVarGuard objects restored the environment variables
- incorrectly on __exit__.
+- Issue #12175: BufferedReader.read(-1) now calls raw.readall() if available.
-C-API
------
+- Issue #12175: FileIO.readall() now only reads the file position and size
+ once.
-- Issue #5630: A replacement PyCObject API, PyCapsule, has been added.
+- Issue #12175: RawIOBase.readall() now returns None if read() returns None.
+- Issue #12175: FileIO.readall() now raises a ValueError instead of an IOError
+ if the file is closed.
-What's New in Python 3.1 alpha 2?
-=================================
+- Issue #11109: New service_action method for BaseServer, used by ForkingMixin
+ class for cleanup. Initial Patch by Justin Warkentin.
-*Release date: 2009-4-4*
+- Issue #12045: Avoid duplicate execution of command in
+ ctypes.util._get_soname(). Patch by Sijin Joseph.
-Core and Builtins
------------------
+- Issue #10818: Remove the Tk GUI and the serve() function of the pydoc module,
+ pydoc -g has been deprecated in Python 3.2 and it has a new enhanced web
+ server.
-- Implement PEP 378, Format Specifier for Thousands Separator, for
- integers.
+- Issue #1441530: In imaplib, read the data in one chunk to speed up large
+ reads and simplify code.
-- Issue #5666: Py_BuildValue's 'c' code should create byte strings.
+- Issue #12070: Fix the Makefile parser of the sysconfig module to handle
+ correctly references to "bogus variable" (e.g. "prefix=$/opt/python").
-- Issue #5499: The 'c' code for argument parsing functions now only accepts a
- byte, and the 'C' code only accepts a unicode character.
+- Issue #12100: Don't reset incremental encoders of CJK codecs at each call to
+ their encode() method anymore, but continue to call the reset() method if the
+ final argument is True.
-- Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
- when hitting the recursion limit under certain circumstances.
+- Issue #12049: Add RAND_bytes() and RAND_pseudo_bytes() functions to the ssl
+ module.
-- Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.
+- Issue #6501: os.device_encoding() returns None on Windows if the application
+ has no console.
-- Fix a segfault when running test_exceptions with coverage, caused by
- insufficient checks in accessors of Exception.__context__.
+- Issue #12105: Add O_CLOEXEC to the os module.
-- Issue #5604: non-ASCII characters in module name passed to
- imp.find_module() were converted to UTF-8 while the path is
- converted to the default filesystem encoding, causing nonsense.
+- Issue #12079: Decimal('Infinity').fma(Decimal('0'), (3.91224318126786e+19+0j))
+ now raises TypeError (reflecting the invalid type of the 3rd argument) rather
+ than Decimal.InvalidOperation.
-- Issue #5126: str.isprintable() returned False for space characters.
+- Issue #12124: zipimport doesn't keep a reference to zlib.decompress() anymore
+ to be able to unload the module.
-- Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
- the end sys.path, for compatibility with the system install of Python.
+- Add the packaging module, an improved fork of distutils (also known as
+ distutils2).
-- Issue #4688: Add a heuristic so that tuples and dicts containing only
- untrackable objects are not tracked by the garbage collector. This can
- reduce the size of collections and therefore the garbage collection overhead
- on long-running programs, depending on their particular use of datatypes.
+- Issue #12065: connect_ex() on an SSL socket now returns the original errno
+ when the socket's timeout expires (it used to return None).
-- Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
- improve its performance. Long divisions and remainder operations
- are now between 50% and 150% faster.
+- Issue #8809: The SMTP_SSL constructor and SMTP.starttls() now support
+ passing a ``context`` argument pointing to an ssl.SSLContext instance.
+ Patch by Kasun Herath.
-- Issue #4258: Make it possible to use base 2**30 instead of base
- 2**15 for the internal representation of integers, for performance
- reasons. Base 2**30 is enabled by default on 64-bit machines. Add
- --enable-big-digits option to configure, which overrides the
- default. Add sys.int_info structseq to provide information about
- the internal format.
+- Issue #11088: don't crash when using F5 to run a script in IDLE on MacOSX
+ with Tk 8.5.
-- Issue #4474: PyUnicode_FromWideChar now converts characters outside
- the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
- and sizeof(Py_UNICODE) == 2.
+- Issue #9516: Issue #9516: avoid errors in sysconfig when MACOSX_DEPLOYMENT_TARGET
+ is set in shell.
-- Issue #5237: Allow auto-numbered fields in str.format(). For
- example: '{} {}'.format(1, 2) == '1 2'.
+- Issue #8650: Make zlib module 64-bit clean. compress(), decompress() and
+ their incremental counterparts now raise OverflowError if given an input
+ larger than 4GB, instead of silently truncating the input and returning
+ an incorrect result.
-- Issue #5392: when a very low recursion limit was set, the interpreter would
- abort with a fatal error after the recursion limit was hit twice.
+- Issue #12050: zlib.decompressobj().decompress() now clears the unconsumed_tail
+ attribute when called without a max_length argument.
-- Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
- short file names.
+- Issue #12062: Fix a flushing bug when doing a certain type of I/O sequence
+ on a file opened in read+write mode (namely: reading, seeking a bit forward,
+ writing, then seeking before the previous write but still within buffered
+ data, and writing again).
-Library
--------
+- Issue #9971: Write an optimized implementation of BufferedReader.readinto().
+ Patch by John O'Connor.
-- Issue #2625: added missing items() call to the for loop in
- mailbox.MH.get_message().
+- Issue #1028: Tk returns invalid Unicode null in %A: UnicodeDecodeError.
+ With Tk < 8.5 _tkinter.c:PythonCmd() raised UnicodeDecodeError, caused
+ IDLE to exit. Converted to valid Unicode null in PythonCmd().
-- Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
- error substitutions from non-strict codec error callbacks in
- incrementalencoder and StreamWriter.
+- Issue #11799: urllib.request Authentication Handlers will raise a ValueError
+ when presented with an unsupported Authentication Scheme. Patch contributed
+ by Yuval Greenfield.
-- Issue #5656: Fix the coverage reporting when running the test suite with
- the -T argument.
+- Issue #10419, #6011: build_scripts command of distutils handles correctly
+ non-ASCII path (path to the Python executable). Open and write the script in
+ binary mode, but ensure that the shebang is decodable from UTF-8 and from the
+ encoding of the script.
-- Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.
+- Issue #8498: In socket.accept(), allow to specify 0 as a backlog value in
+ order to accept exactly one connection. Patch by Daniel Evers.
-- Issue #5624: Fix the _winreg module name still used in several modules.
+- Issue #12011: signal.signal() and signal.siginterrupt() raise an OSError,
+ instead of a RuntimeError: OSError has an errno attribute.
-- Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.
+- Issue #3709: add a flush_headers method to BaseHTTPRequestHandler, which
+ manages the sending of headers to output stream and flushing the internal
+ headers buffer. Patch contribution by Andrew Schaaf
-- Issue #5619: Multiprocessing children disobey the debug flag and causes
- popups on windows buildbots. Patch applied to work around this issue.
+- Issue #11743: Rewrite multiprocessing connection classes in pure Python.
-- Issue #5400: Added patch for multiprocessing on netbsd compilation/support
+- Issue #11164: Stop trying to use _xmlplus in the xml module.
-- Issue #5387: Fixed mmap.move crash by integer overflow.
+- Issue #11888: Add log2 function to math module. Patch written by Mark
+ Dickinson.
-- Issue #5261: Patch multiprocessing's semaphore.c to support context
- manager use: "with multiprocessing.Lock()" works now.
+- Issue #12012: ssl.PROTOCOL_SSLv2 becomes optional.
-- Issue #5236: Change time.strptime() to only take strings. Didn't work with
- bytes already but the failure was non-obvious.
+- Issue #8407: The signal handler writes the signal number as a single byte
+ instead of a nul byte into the wakeup file descriptor. So it is possible to
+ wait more than one signal and know which signals were raised.
-- Issue #5177: Multiprocessing's SocketListener class now uses
- socket.SO_REUSEADDR on all connections so that the user no longer needs
- to wait 120 seconds for the socket to expire.
+- Issue #8407: Add pthread_kill(), sigpending() and sigwait() functions to the
+ signal module.
-- Issue #5595: Fix UnboundedLocalError in ntpath.ismount().
+- Issue #11927: SMTP_SSL now uses port 465 by default as documented. Patch
+ by Kasun Herath.
-- Issue #1174606: Calling read() without arguments of an unbounded file
- (typically /dev/zero under Unix) could crash the interpreter.
+- Issue #12002: ftplib's abort() method raises TypeError.
-- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
- io.BufferedRandom have been deprecated for removal in Python 3.2.
+- Issue #11916: Add a number of MacOSX specific definitions to the errno module.
+ Patch by Pierre Carrier.
-- Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
- forever on incomplete input. That caused tarfile.open() to hang when used
- with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
- partial bzip2 compressed data.
+- Issue #11999: fixed sporadic sync failure mailbox.Maildir due to its trying to
+ detect mtime changes by comparing to the system clock instead of to the
+ previous value of the mtime.
-- Issue #2110: Add support for thousands separator and 'n' type
- specifier to Decimal.__format__
+- Issue #11072: added MLSD command (RFC-3659) support to ftplib.
-- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
- '>' alignment characters.
+- Issue #8808: The IMAP4_SSL constructor now allows passing an SSLContext
+ parameter to control parameters of the secure channel. Patch by Sijin
+ Joseph.
-- The error detection code in FileIO.close() could fail to reflect the `errno`
- value, and report it as -1 instead.
+- ntpath.samefile failed to notice that "a.txt" and "A.TXT" refer to the same
+ file on Windows XP. As noticed in issue #10684.
-- Issue #5016: FileIO.seekable() could return False if the file position
- was negative when truncated to a C int. Patch by Victor Stinner.
+- Issue #12000: When a SSL certificate has a subjectAltName without any
+ dNSName entry, ssl.match_hostname() should use the subject's commonName.
+ Patch by Nicolas Bareil.
-Extension Modules
------------------
+- Issue #10775: assertRaises, assertRaisesRegex, assertWarns, and
+ assertWarnsRegex now accept a keyword argument 'msg' when used as context
+ managers. Initial patch by Winston Ewert.
-- Issue #5391: mmap now deals exclusively with bytes.
+- Issue #10684: shutil.move used to delete a folder on case insensitive
+ filesystems when the source and destination name where the same except
+ for the case.
-- Issue #5463: In struct module, remove deprecated overflow wrapping
- when packing an integer: struct.pack('=L', -1) now raises
- struct.error instead of returning b'\xff\xff\xff\xff'. The
- _PY_STRUCT_RANGE_CHECKING and _PY_STRUCT_OVERFLOW_MASKING constants
- have been removed from the struct module.
+- Issue #11647: objects created using contextlib.contextmanager now support
+ more than one call to the function when used as a decorator. Initial patch
+ by Ysj Ray.
+- Issue #11930: Removed deprecated time.accept2dyear variable.
+ Removed year >= 1000 restriction from datetime.strftime.
-What's New in Python 3.1 alpha 1
-================================
+- logging: don't define QueueListener if Python has no thread support.
-*Release date: 2009-03-07*
+- functools.cmp_to_key() now works with collections.Hashable().
-Core and Builtins
------------------
+- Issue #11277: mmap.mmap() calls fcntl(fd, F_FULLFSYNC) on Mac OS X to get
+ around a mmap bug with sparse files. Patch written by Steffen Daode Nurpmeso.
-- The io module has been reimplemented in C for speed.
+- Issue #8407: Add signal.pthread_sigmask() function to fetch and/or change the
+ signal mask of the calling thread.
-- Give dict views an informative __repr__.
+- Issue #11858: configparser.ExtendedInterpolation expected lower-case section
+ names.
-- Issue #5247: Improve error message when unknown format codes are
- used when using str.format() with str, int, and float arguments.
+- Issue #11324: ConfigParser(interpolation=None) now works correctly.
-- Issue #5249: time.strftime returned malformed string when format string
- contained non ascii character on windows.
+- Issue #11811: ssl.get_server_certificate() is now IPv6-compatible. Patch
+ by Charles-François Natali.
-- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
- source has already been decoded into str.
+- Issue #11763: don't use difflib in TestCase.assertMultiLineEqual if the
+ strings are too long.
-- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
- rotating the object pointer by 4 bits to the right.
+- Issue #11236: getpass.getpass responds to ctrl-c or ctrl-z on terminal.
-- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
- it now forces its argument to double before testing for infinity.
+- Issue #11856: Speed up parsing of JSON numbers.
-- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
- returns a non-number type.
+- Issue #11005: threading.RLock()._release_save() raises a RuntimeError if the
+ lock was not acquired.
-- Issue #5182: Removed memoryview.__str__.
+- Issue #11258: Speed up ctypes.util.find_library() under Linux by a factor
+ of 5 to 10. Initial patch by Jonas H.
-- Issue #1717: Removed builtin cmp() function, dropped tp_compare
- slot, the C API functions PyObject_Compare and PyUnicode_Compare and
- the type definition cmpfunc. The tp_compare slot has been renamed
- to tp_reserved, and is reserved for future usage.
+- Issue #11382: Trivial system calls, such as dup() or pipe(), needn't
+ release the GIL. Patch by Charles-François Natali.
-- Issue #1242657: the __len__() and __length_hint__() calls in several tools
- were suppressing all exceptions. These include list() and bytearray().
+- Issue #11223: Add threading._info() function providing informations about
+ the thread implementation.
-- Issue #4707: round(x, n) now returns an integer if x is an integer.
- Previously it returned a float.
+- Issue #11731: simplify/enhance email parser/generator API by introducing
+ policy objects.
-- Issue #4753: By enabling a configure option named '--with-computed-gotos'
- on compilers that support it (notably: gcc, SunPro, icc), the bytecode
- evaluation loop is compiled with a new dispatch mechanism which gives
- speedups of up to 20%, depending on the system, on various benchmarks.
+- Issue #11768: The signal handler of the signal module only calls
+ Py_AddPendingCall() for the first signal to fix a deadlock on reentrant or
+ parallel calls. PyErr_SetInterrupt() writes also into the wake up file.
-- Issue #4874: Most builtin decoders now reject unicode input.
+- Issue #11492: fix several issues with header folding in the email package.
-- Issue #4842: Don't allow trailing 'L' when constructing an integer
- from a string.
+- Issue #11852: Add missing imports and update tests.
-- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.
+- Issue #11875: collections.OrderedDict's __reduce__ was temporarily
+ mutating the object instead of just working on a copy.
-- Issue #4838: When a module is deallocated, free the memory backing the
- optional module state data.
+- Issue #11467: Fix urlparse behavior when handling urls which contains scheme
+ specific part only digits. Patch by Santoso Wijaya.
-- Issue #4910: Rename nb_long slot to nb_reserved, and change its
- type to ``(void *)``.
+- collections.Counter().copy() now works correctly for subclasses.
-- Issue #4935: The overflow checking code in the expandtabs() method common
- to str, bytes and bytearray could be optimized away by the compiler, letting
- the interpreter segfault instead of raising an error.
+- Issue #11474: Fix the bug with url2pathname() handling of '/C|/' on Windows.
+ Patch by Santoso Wijaya.
-- Issue #3720: Fix a crash when an iterator modifies its class and removes its
- __next__ method.
+- Issue #11684: complete email.parser bytes API by adding BytesHeaderParser.
-- Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
- function no longer attempt to call the __long__ slot to convert an object
- to an integer. Only the __int__ and __trunc__ slots are examined.
+- The bz2 module now handles 4GiB+ input buffers correctly.
-- Issue #4893: Use NT threading on CE.
+- Issue #9233: Fix json.loads('{}') to return a dict (instead of a list), when
+ _json is not available.
-- Issue #4915: Port sysmodule to Windows CE.
+- Issue #11830: Remove unnecessary introspection code in the decimal module.
-- Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
- common cases are optimized thanks to a dedicated fast path and a moderate
- amount of loop unrolling.
+- Issue #11703: urllib2.geturl() does not return correct url when the original
+ url contains #fragment.
-- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
- collecting the oldest generation) so that allocating lots of objects without
- destroying them does not show quadratic performance. Based on a proposal by
- Martin von Löwis at
- http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
+- Issue #10019: Fixed regression in json module where an indent of 0 stopped
+ adding newlines and acted instead like 'None'.
-- Issue #4604: Some objects of the I/O library could still be used after
- having been closed (for instance, a read() call could return some
- previously buffered data). Patch by Dmitry Vasiliev.
+- Issue #11186: pydoc ignores a module if its name contains a surrogate
+ character in the index of modules.
-- Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
- flag to work properly. Furthermore, when specifying -u, the text stdout
- and stderr streams have line-by-line buffering enabled (the default being
- to buffer arbitrary chunks of data).
+- Issue #11815: Use a light-weight SimpleQueue for the result queue in
+ concurrent.futures.ProcessPoolExecutor.
-- The internal table, _PyLong_DigitValue, is now an array of unsigned chars
- instead of ints (reducing its size from 4 to 8 times thereby reducing
- Python's overall memory).
+- Issue #5162: Treat services like frozen executables to allow child spawning
+ from multiprocessing.forking on Windows.
-- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
- an existing .py counterpart, override the co_filename attributes of all
- code objects if the original filename is obsolete (which can happen if the
- file has been renamed, moved, or if it is accessed through different paths).
- Patch by Ziga Seilnacht and Jean-Paul Calderone.
+- logging.basicConfig now supports an optional 'handlers' argument taking an
+ iterable of handlers to be added to the root logger. Additional parameter
+ checks were also added to basicConfig.
-- Issue #4580: Fix slicing of memoryviews when the item size is greater than
- one byte. Also fixes the meaning of len() so that it returns the number of
- items, rather than the size in bytes.
+- Issue #11814: Fix likely typo in multiprocessing.Pool._terminate().
-- Issue #4075: Use OutputDebugStringW in Py_FatalError.
+- Issue #11747: Fix range formatting in difflib.context_diff() and
+ difflib.unified_diff().
-- Issue #4747: When the terminal does not use utf-8, executing a script with
- non-ascii characters in its name could fail with a "SyntaxError: None" error.
+- Issue #8428: Fix a race condition in multiprocessing.Pool when terminating
+ worker processes: new processes would be spawned while the pool is being
+ shut down. Patch by Charles-François Natali.
-- Issue #4797: IOError.filename was not set when ``_fileio.FileIO`` failed
- to open file with a bytes filename on Windows.
+- Issue #2650: re.escape() no longer escapes the '_'.
-- Issue #3680: Reference cycles created through a dict, set or deque iterator
- did not get collected.
+- Issue #11757: select.select() now raises ValueError when a negative timeout
+ is passed (previously, a select.error with EINVAL would be raised). Patch
+ by Charles-François Natali.
-- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
- where the tp_hash and tp_dict slots are both NULL.
+- Issue #7311: fix html.parser to accept non-ASCII attribute values.
-- Issue #4759: None is now allowed as the first argument of
- bytearray.translate(). It was always allowed for bytes.translate().
+- Issue #11605: email.parser.BytesFeedParser was incorrectly converting
+ multipart subparts with an 8-bit CTE into unicode instead of preserving the
+ bytes.
-- Added test case to ensure attempts to read from a file opened for writing
- fail.
+- Issue #1690608: email.util.formataddr is now RFC 2047 aware: it now has a
+ charset parameter that defaults to utf-8 and is used as the charset for RFC
+ 2047 encoding when the realname contains non-ASCII characters.
-- Issue #3106: Speedup some comparisons (str/str and int/int).
+- Issue #10963: Ensure that subprocess.communicate() never raises EPIPE.
-- Issue #2183: Simplify and optimize bytecode for list, dict and set
- comprehensions. Original patch for list comprehensions by Neal Norwitz.
+- Issue #10791: Implement missing method GzipFile.read1(), allowing GzipFile
+ to be wrapped in a TextIOWrapper. Patch by Nadeem Vawda.
-- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
- print elapsed times, not only when some objects are uncollectable /
- unreachable. Original patch by Neil Schemenauer.
+- Issue #11707: Added a fast C version of functools.cmp_to_key().
+ Patch by Filip Gruszczyński.
-- Issue #3439: Add a bit_length method to int.
+- Issue #11688: Add sqlite3.Connection.set_trace_callback(). Patch by
+ Torsten Landschoff.
-- Issue #2173: When getting device encoding, check that return value of
- nl_langinfo is not the empty string. This was causing silent build
- failures on OS X.
+- Issue #11746: Fix SSLContext.load_cert_chain() to accept elliptic curve
+ private keys.
-- Issue #4597: Fixed several opcodes that weren't always propagating
- exceptions.
+- Issue #5863: Rewrite BZ2File in pure Python, and allow it to accept
+ file-like objects using a new ``fileobj`` constructor argument. Patch by
+ Nadeem Vawda.
-- Issue #4589: Fixed exception handling when the __exit__ function of a
- context manager returns a value that cannot be converted to a bool.
+- unittest.TestCase.assertSameElements has been removed.
-- Issue #4445: Replace "sizeof(PyBytesObject)" with
- "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
- bytes instances. On a typical machine this saves 3 bytes of memory
- (on average) per allocation of a bytes instance.
+- sys.getfilesystemencoding() raises a RuntimeError if initfsencoding() was not
+ called yet: detect bootstrap (startup) issues earlier.
-- Issue #4533: File read operation was dreadfully slow due to a slowly
- growing read buffer. Fixed by using the same growth rate algorithm as
- Python 2.x.
+- Issue #11393: Add the new faulthandler module.
-- Issue #4509: Various issues surrounding resize of bytearray objects to
- which there are buffer exports (e.g. memoryview instances).
+- Issue #11618: Fix the timeout logic in threading.Lock.acquire() under Windows.
-- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
- method on file objects with closefd=False. The file descriptor is still
- kept open but the file object behaves like a closed file. The ``FileIO``
- object also got a new readonly attribute ``closefd``.
+- Removed the 'strict' argument to email.parser.Parser, which has been
+ deprecated since Python 2.4.
-- Issue #4569: Interpreter crash when mutating a memoryview with an item size
- larger than 1.
+- Issue #11256: Fix inspect.getcallargs on functions that take only keyword
+ arguments.
-- Issue #4748: Lambda generators no longer return a value.
+- Issue #11696: Fix ID generation in msilib.
-- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
+- itertools.accumulate now supports an optional *func* argument for
+ a user-supplied binary function.
-- Issue #5108: Handle %s like %S, %R and %A in PyUnicode_FromFormatV(): Call
- PyUnicode_DecodeUTF8() once, remember the result and output it in a second
- step. This avoids problems with counting UTF-8 bytes that ignores the effect
- of using the replace error handler in PyUnicode_DecodeUTF8().
+- Issue #11692: Remove unnecessary demo functions in subprocess module.
-Library
--------
+- Issue #9696: Fix exception incorrectly raised by xdrlib.Packer.pack_int when
+ trying to pack a negative (in-range) integer.
-- Issue #7071: byte-compilation in Distutils is now done with respect to
- sys.dont_write_bytecode.
+- Issue #11675: multiprocessing.[Raw]Array objects created from an integer size
+ are now zeroed on creation. This matches the behaviour specified by the
+ documentation.
-- Issue #7066: archive_util.make_archive now restores the cwd if an error is
- raised. Initial patch by Ezio Melotti.
+- Issue #7639: Fix short file name generation in bdist_msi
-- Issue #6516: Added owner/group support when creating tar archives in
- Distutils.
+- Issue #11659: Fix ResourceWarning in test_subprocess introduced by #11459.
+ Patch by Ben Hayden.
-- Issue #6954: Fixed crash when using DISTUTILS_DEBUG flag in Distutils.
+- Issue #11635: Don't use polling in worker threads and processes launched by
+ concurrent.futures.
-- Issue #6163: Fixed HP-UX runtime library dir options in
- distutils.unixcompiler. Initial patch by Sridhar Ratnakumar and
- Michael Haubenwallner.
+- Issue #6811: Allow importlib to change a code object's co_filename attribute
+ to match the path to where the source code currently is, not where the code
+ object originally came from.
-- Issue #6693: New functions in site.py to get user/global site packages paths.
+- Issue #8754: Have importlib use the repr of a module name in error messages.
-- Issue #6511: ZipFile now raises BadZipfile (instead of an IOError) when
- opening an empty or very small file.
+- Issue #11591: Prevent "import site" from modifying sys.path when python
+ was started with -S.
-- Issue #6545: Removed assert statements in distutils.Extension, so the
- behavior is similar when used with -O.
+- collections.namedtuple() now adds a _source attribute to the generated
+ class. This make the source more accessible than the outdated
+ "verbose" option which prints to stdout but doesn't make the source
+ string available.
-- unittest has been split up into a package. All old names should still work.
+- Issue #11371: Mark getopt error messages as localizable. Patch by Filip
+ Gruszczyński.
-- Issue #6466: now distutils.cygwinccompiler and distutils.emxccompiler
- uses the same refactored function to get gcc/ld/dllwrap versions numbers.
- It's `distutils.util.get_compiler_versions`. Added deprecation warnings
- for the obsolete get_versions() functions.
+- Issue #11333: Add __slots__ to collections ABCs.
-- Issue #6433: fixed issues with multiprocessing.pool.map hanging on empty list
+- Issue #11628: cmp_to_key generated class should use __slots__.
-- Issue #6314: logging: Extra checks on the "level" argument in more places.
+- Issue #11666: let help() display named tuple attributes and methods
+ that start with a leading underscore.
-- Issue #2622: Fixed an ImportError when importing email.message from a
- standalone application built with py2exe or py2app.
+- Issue #11662: Make urllib and urllib2 ignore redirections if the
+ scheme is not HTTP, HTTPS or FTP (CVE-2011-1521).
-- Issue #6455: Fixed test_build_ext under win32.
+- Issue #5537: Fix time2isoz() and time2netscape() functions of
+ httplib.cookiejar for expiration year greater than 2038 on 32-bit systems.
-- Issue #6377: Enabled the compiler option, and deprecate its usage as an
- attribute.
+- Issue #4391: Use proper gettext plural forms in optparse.
-- Issue #6413: Fixed the log level in distutils.dist for announce.
+- Issue #11127: Raise a TypeError when trying to pickle a socket object.
-- Issue #6403: Fixed package path usage in build_ext.
+- Issue #11563: Connection:close header is sent by requests using URLOpener
+ class which helps in closing of sockets after connection is over. Patch
+ contributions by Jeff McNeil and Nadeem Vawda.
-- Issues #5155, 5313, 5331: multiprocessing.Process._bootstrap was
- unconditionally calling "os.close(sys.stdin.fileno())" resulting in file
- descriptor errors
+- Issue #11459: A ``bufsize`` value of 0 in subprocess.Popen() really creates
+ unbuffered pipes, such that select() works properly on them.
-- Issue #6365: Distutils build_ext inplace mode was copying the compiled
- extension in a subdirectory if the extension name had dots.
+- Issue #5421: Fix misleading error message when one of socket.sendto()'s
+ arguments has the wrong type. Patch by Nikita Vetoshkin.
-- Issue #6164: Added an AIX specific linker argument in Distutils
- unixcompiler. Original patch by Sridhar Ratnakumar.
+- Issue #10812: Add some extra posix functions to the os module.
-- Issue #6286: Now Distutils upload command is based on urllib2 instead of
- httplib, allowing the usage of http_proxy.
+- Issue #10979: unittest stdout buffering now works with class and module
+ setup and teardown.
-- Issue #6287: Added the license field in Distutils documentation.
+- Issue #11577: fix ResourceWarning triggered by improved binhex test coverage
-- Issue #6263: Fixed syntax error in distutils.cygwincompiler.
+- Issue #11243: fix the parameter querying methods of Message to work if
+ the headers contain un-encoded non-ASCII data.
-- Issue #5201: distutils.sysconfig.parse_makefile() now understands `$$`
- in Makefiles. This prevents compile errors when using syntax like:
- `LDFLAGS='-rpath=\$$LIB:/some/other/path'`. Patch by Floris Bruynooghe.
+- Issue #11401: fix handling of headers with no value; this fixes a regression
+ relative to Python2 and the result is now the same as it was in Python2.
-- Issue #6131: test_modulefinder leaked when run after test_distutils.
- Patch by Hirokazu Yamamoto.
+- Issue #9298: base64 bodies weren't being folded to line lengths less than 78,
+ which was a regression relative to Python2. Unlike Python2, the last line
+ of the folded body now ends with a carriage return.
-- Issue #6048: Now Distutils uses the tarfile module in archive_util.
+- Issue #11560: shutil.unpack_archive now correctly handles the format
+ parameter. Patch by Evan Dandrea.
-- Issue #6062: In distutils, fixed the package option of build_ext. Feedback
- and tests on pywin32 by Tim Golden.
+- Issue #5870: Add `subprocess.DEVNULL` constant.
-- Issue #6053: Fixed distutils tests on win32. patch by Hirokazu Yamamoto.
+- Issue #11133: fix two cases where inspect.getattr_static can trigger code
+ execution. Patch by Andreas Stührk.
-- Issue #6046: Fixed the library extension when distutils build_ext is used
- inplace. Initial patch by Roumen Petrov.
+- Issue #11569: use absolute path to the sysctl command in multiprocessing to
+ ensure that it will be found regardless of the shell PATH. This ensures
+ that multiprocessing.cpu_count works on default installs of MacOSX.
-- Issue #6041: Now distutils `sdist` and `register` commands use `check` as a
- subcommand.
+- Issue #11501: disutils.archive_utils.make_zipfile no longer fails if zlib is
+ not installed. Instead, the zipfile.ZIP_STORED compression is used to create
+ the ZipFile. Patch by Natalia B. Bidart.
-- Issue #6022: a test file was created in the current working directory by
- test_get_outputs in Distutils.
+- Issue #11289: `smtp.SMTP` class is now a context manager so it can be used
+ in a `with` statement. Contributed by Giampaolo Rodola.
-- Issue #5977: distutils build_ext.get_outputs was not taking into account the
- inplace option. Initial patch by kxroberto.
+- Issue #11554: Fixed support for Japanese codecs; previously the body output
+ encoding was not done if euc-jp or shift-jis was specified as the charset.
-- Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
- for old-style extensions.
+- Issue #11509: Significantly increase test coverage of fileinput.
+ Patch by Denver Coneybeare at PyCon 2011 Sprints.
-- Issue #5976: Fixed Distutils test_check_environ.
+- Issue #11407: `TestCase.run` returns the result object used or created.
+ Contributed by Janathan Hartley.
-- Issue #5941: Distutils build_clib command was not working anymore because
- of an incomplete costumization of the archiver command. Added ARFLAGS in the
- Makefile besides AR and make Distutils use it. Original patch by David
- Cournapeau.
+- Issue #11500: Fixed a bug in the OS X proxy bypass code for fully qualified
+ IP addresses in the proxy exception list.
-- Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.
+- Issue #11491: dbm.error is no longer raised when dbm.open is called with
+ the "n" as the flag argument and the file exists. The behavior matches
+ the documentation and general logic.
-- Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
- anymore.
+- Issue #1162477: Postel Principle adjustment to email date parsing: handle the
+ fact that some non-compliant MUAs use '.' instead of ':' in time specs.
-- Issue #5810: Fixed Distutils test_build_scripts so it uses
- sysconfig.get_config_vars.
+- Issue #11131: Fix sign of zero in decimal.Decimal plus and minus
+ operations when the rounding mode is ROUND_FLOOR.
-- Issue #4951: Fixed failure in test_httpservers.
+- Issue #9935: Speed up pickling of instances of user-defined classes.
-- Issue #5795: Fixed test_distutils failure on Debian ppc.
+- Issue #5622: Fix curses.wrapper to raise correct exception if curses
+ initialization fails.
-- Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.
+- Issue #11408: In threading.Lock.acquire(), only call gettimeofday() when
+ really necessary. Patch by Charles-François Natali.
-- Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
- a value in SafeConfigParser.
+- Issue #11391: Writing to a mmap object created with
+ ``mmap.PROT_READ|mmap.PROT_EXEC`` would segfault instead of raising a
+ TypeError. Patch by Charles-François Natali.
-- Issue #5732: added a new command in Distutils: check.
+- Issue #9795: add context manager protocol support for nntplib.NNTP class.
-- Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
- platforms. Initial patch by Paul Moore.
+- Issue #11306: mailbox in certain cases adapts to an inability to open
+ certain files in read-write mode. Previously it detected this by
+ checking for EACCES, now it also checks for EROFS.
-- Issue #5095: Added bdist_msi to the list of bdist supported formats.
- Initial fix by Steven Bethard.
+- Issue #11265: asyncore now correctly handles EPIPE, EBADF and EAGAIN errors
+ on accept(), send() and recv().
-- Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
- Initial fix by Wayne Davison.
+- Issue #11377: Deprecate platform.popen() and reimplement it with os.popen().
-- Issue #5694: removed spurious test output in Distutils (test_clean).
+- Issue #8513: On UNIX, subprocess supports bytes command string.
-- Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
+- Issue #10866: Add socket.sethostname(). Initial patch by Ross Lagerwall.
-- Issue #1665206 (partially): Move imports in cgitb to the top of the module
- instead of performing them in functions. Helps prevent import deadlocking in
- threads.
+- Issue #11140: Lock.release() now raises a RuntimeError when attempting
+ to release an unacquired lock, as claimed in the threading documentation.
+ The _thread.error exception is now an alias of RuntimeError. Patch by
+ Filip Gruszczyński. Patch for _dummy_thread by Aymeric Augustin.
-- Issue #2522: locale.format now checks its first argument to ensure it has
- been passed only one pattern, avoiding mysterious errors where it appeared
- that it was failing to do localization.
+- Issue #8594: ftplib now provides a source_address parameter to specify which
+ (address, port) to bind to before connecting.
-- Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
- Brandl.
+- Issue #11326: Add the missing connect_ex() implementation for SSL sockets,
+ and make it work for non-blocking connects.
-- Issue #1222: locale.format() bug when the thousands separator is a space
- character.
+- Issue #11297: Add collections.ChainMap().
-- Issue #5472: Fixed distutils.test_util tear down. Original patch by
- Tim Golden.
+- Issue #10755: Add the posix.flistdir() function. Patch by Ross Lagerwall.
-- collections.deque() objects now have a read-only attribute called maxlen.
+- Issue #4761: Add the ``*at()`` family of functions (openat(), etc.) to the
+ posix module. Patch by Ross Lagerwall.
-- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
- it is has been populated and properly configured in order to prevent
- window flashing.
+- Issue #7322: Trying to read from a socket's file-like object after a timeout
+ occurred now raises an error instead of silently losing data.
-- Issue #4792: Prevent a segfault in _tkinter by using the
- guaranteed to be safe interp argument given to the PythonCmd in place of
- the Tcl interpreter taken from a PythonCmd_ClientData.
+- Issue #11291: poplib.POP no longer suppresses errors on quit().
-- Issue #5193: Guarantee that tkinter.Text.search returns a string.
+- Issue #11177: asyncore's create_socket() arguments can now be omitted.
-- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
- Original patch by Akira Kitada.
+- Issue #6064: Add a ``daemon`` keyword argument to the threading.Thread
+ and multiprocessing.Process constructors in order to override the
+ default behaviour of inheriting the daemonic property from the current
+ thread/process.
-- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.
+- Issue #10956: Buffered I/O classes retry reading or writing after a signal
+ has arrived and the handler returned successfully.
-- Issue #5385: Fixed mmap crash after resize failure on windows.
+- Issue #10784: New os.getpriority() and os.setpriority() functions.
-- Issue #5179: Fixed subprocess handle leak on failure on windows.
+- Issue #11114: Fix catastrophic performance of tell() on text files (up
+ to 1000x faster in some cases). It is still one to two order of magnitudes
+ slower than binary tell().
-- PEP 372: Added collections.OrderedDict().
+- Issue #10882: Add os.sendfile function.
-- The _asdict() for method for namedtuples now returns an OrderedDict().
+- Issue #10868: Allow usage of the register method of an ABC as a class
+ decorator.
-- configparser now defaults to using an ordered dictionary.
+- Issue #11224: Fixed a regression in tarfile that affected the file-like
+ objects returned by TarFile.extractfile() regarding performance, memory
+ consumption and failures with the stream interface.
-- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
- import guess_extension`` was used.
+- Issue #10924: Adding salt and Modular Crypt Format to crypt library.
+ Moved old C wrapper to _crypt, and added a Python wrapper with
+ enhanced salt generation and simpler API for password generation.
-- Issue #1733986: Fixed mmap crash in accessing elements of second map object
- with same tagname but larger size than first map. (Windows)
+- Issue #11074: Make 'tokenize' so it can be reloaded.
-- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
- overrun.
+- Issue #11085: Moved collections abstract base classes into a separate
+ module called collections.abc, following the pattern used by importlib.abc.
+ For backwards compatibility, the names are imported into the collections
+ module.
-- Issue #1533164: Installed but not listed ``*.pyo`` was breaking Distutils
- bdist_rpm command.
+- Issue #4681: Allow mmap() to work on file sizes and offsets larger than
+ 4GB, even on 32-bit builds. Initial patch by Ross Lagerwall, adapted for
+ 32-bit Windows.
-- Issue #5378: added --quiet option to Distutils bdist_rpm command.
+- Issue #11169: compileall module uses repr() to format filenames and paths to
+ escape surrogate characters and show spaces.
-- Issue #5052: make Distutils compatible with 2.3 again.
+- Issue #11089: Fix performance issue limiting the use of ConfigParser()
+ with large config files.
-- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
- in Distutils tests.
+- Issue #10276: Fix the results of zlib.crc32() and zlib.adler32() on buffers
+ larger than 4GB. Patch by Nadeem Vawda.
-- Issue #5287: Add exception handling around findCaller() call to help out
- IronPython.
+- Issue #11388: Added a clear() method to MutableSequence
-- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
- The file was resized to wrong size.
+- Issue #11174: Add argparse.MetavarTypeHelpFormatter, which uses type names
+ for the names of optional and positional arguments in help messages.
-- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
+- Issue #9348: Raise an early error if argparse nargs and metavar don't match.
-- Issue #2279: distutils.sdist.add_defaults now add files
- from the package_data and the data_files metadata.
+- Issue #8982: Improve the documentation for the argparse Namespace object.
-- Issue #5257: refactored all tests in distutils, so they use
- support.TempdirManager, to avoid writing in the tests directory.
+- Issue #9343: Document that argparse parent parsers must be configured before
+ their children.
-- Issue #4524: distutils build_script command failed with --with-suffix=3.
- Initial patch by Amaury Forgeot d'Arc.
+- Issue #9026: Fix order of argparse sub-commands in help messages.
-- Issue #2461: added tests for distutils.util
+- Issue #9347: Fix formatting for tuples in argparse type= error messages.
-- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
- which inherited from numbers.py which did not have __slots__ defined. The
- numbers hierarchy now has its own __slots__ declarations.
+- Issue #12191: Added shutil.chown() to change user and/or group owner of a
+ given path also specifying their names.
-- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
- encoding.
+- Issue #13988: The _elementtree accelerator is used whenever available.
+ Now xml.etree.cElementTree becomes a deprecated alias to ElementTree.
-- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
- function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
+Build
+-----
-- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
- under NT and OS2. Patch by Philip Jenvey.
+- Issue #6807: Run msisupport.mak earlier.
-- Issue #5128: Make compileall properly inspect bytecode to determine if needs
- to be recreated. This avoids a timing hole thanks to the old reliance on the
- ctime of the files involved.
+- Issue #10580: Minor grammar change in Windows installer.
-- Issue #5122: Synchronize tk load failure check to prevent a potential
- deadlock.
+- Issue #13326: Clean __pycache__ directories correctly on OpenBSD.
-- Issue #1818: collections.namedtuple() now supports a keyword argument
- 'rename' which lets invalid fieldnames be automatically converted to
- positional names in the form, _1, _2, ...
+- PEP 393: the configure option --with-wide-unicode is removed.
-- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
+- Issue #12852: Set _XOPEN_SOURCE to 700, instead of 600, to get POSIX 2008
+ functions on OpenBSD (e.g. fdopendir).
-- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
- public documented method ``ZipImporter.get_filename()``.
+- Issue #11863: Remove support for legacy systems deprecated in Python 3.2
+ (following PEP 11). These systems are systems using Mach C Threads,
+ SunOS lightweight processes, GNU pth threads and IRIX threads.
-- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
- the execution of packages by looking for and executing a ``__main__``
- submodule when a package name is supplied. Initial patch by Andi
- Vajda.
+- Issue #8746: Correct faulty configure checks so that os.chflags() and
+ os.lchflags() are once again built on systems that support these
+ functions (BSD and OS X). Also add new stat file flags for OS X
+ (UF_HIDDEN and UF_COMPRESSED).
-- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
- not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
- Tkapp_Call when calling from a thread different than the one that created
- the Tcl interpreter. Patch by Robert Hancock.
+- Issue #10645: Installing Python no longer creates a
+ Python-X.Y.Z-pyX.Y.egg-info file in the lib-dynload directory.
-- Issue #4285: Change sys.version_info to be a named tuple. Patch by
- Ross Light.
+- Do not accidentally include the directory containing sqlite.h twice when
+ building sqlite3.
-- Issue #1520877: Now distutils.sysconfig reads $AR from the
- environment/Makefile. Patch by Douglas Greiman.
+- Issue #11217: For 64-bit/32-bit Mac OS X universal framework builds,
+ ensure "make install" creates symlinks in --prefix bin for the "-32"
+ files in the framework bin directory like the installer does.
-- Issue #1276768: The verbose option was not used in the code of
- distutils.file_util and distutils.dir_util.
+- Issue #11347: Use --no-as-needed when linking libpython3.so.
-- Issue #5132: Fixed trouble building extensions under Solaris with
- --enabled-shared activated. Initial patch by Dave Peterson.
+- Issue #11411: Fix 'make DESTDIR=' with a relative destination.
-- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
+- Issue #11268: Prevent Mac OS X Installer failure if Documentation
+ package had previously been installed.
-- The shelve module now defaults to pickle protocol 3.
+- Issue #11495: OSF support is eliminated. It was deprecated in Python 3.2.
-- Fix a bug in the trace module where a bytes object from co_lnotab had its
- items being passed through ord().
-- Issue #2047: shutil.move() could believe that its destination path was
- inside its source path if it began with the same letters (e.g. "src" vs.
- "src.new").
+IDLE
+----
-- Added the ttk module. See issue #2983: Ttk support for Tkinter.
+- Issue #11718: IDLE's open module dialog couldn't find the __init__.py
+ file in a package.
-- Removed isSequenceType(), isMappingType, and isNumberType() from the
- operator module; use the abstract base classes instead. Also removed
- the repeat() function; use mul() instead.
+Tools/Demos
+-----------
-- Issue #5021: doctest.testfile() did not create __name__ and
- collections.namedtuple() relied on __name__ being defined.
+- Issue #14053: patchcheck.py ("make patchcheck") now works with MQ patches.
+ Patch by Francisco Martín Brugué.
-- Backport importlib from Python 3.1. Only the import_module() function has
- been backported to help facilitate transitions from 2.7 to 3.1.
+- Issue #13930: 2to3 is now able to write its converted output files to another
+ directory tree as well as copying unchanged files and altering the file
+ suffix. See its new -o, -W and --add-suffix options. This makes it more
+ useful in many automated code translation workflows.
-- Issue #1885: distutils. When running sdist with --formats=tar,gztar
- the tar file was overriden by the gztar one.
+- Issue #13628: python-gdb.py is now able to retrieve more frames in the Python
+ traceback if Python is optimized.
-- Issue #4863: distutils.mwerkscompiler has been removed.
+- Issue #11996: libpython (gdb), replace "py-bt" command by "py-bt-full" and
+ add a smarter "py-bt" command printing a classic Python traceback.
-- Added a new itertools functions: combinations_with_replacement()
- and compress().
+- Issue #11179: Make ccbench work under Python 3.1 and 2.7 again.
-- Issue #5032: added a step argument to itertools.count() and
- allowed non-integer arguments.
+- Issue #10639: reindent.py no longer converts newlines and will raise
+ an error if attempting to convert a file with mixed newlines.
+ "--newline" option added to specify new line character.
-- Fix and properly document the multiprocessing module's logging
- support, expose the internal levels and provide proper usage
- examples.
+Extension Modules
+-----------------
-- Issue #1672332: fix unpickling of subnormal floats, which was
- producing a ValueError on some platforms.
+- Issue #13840: The error message produced by ctypes.create_string_buffer
+ when given a Unicode string has been fixed.
-- Issue #3881: Help Tcl to load even when started through the
- unreadable local symlink to "Program Files" on Vista.
+- Issue #9975: socket: Fix incorrect use of flowinfo and scope_id. Patch by
+ Vilmos Nebehaj.
-- Issue #4710: Extract directories properly in the zipfile module;
- allow adding directories to a zipfile.
+- Issue #7777: socket: Add Reliable Datagram Sockets (PF_RDS) support.
-- Issue #3807: _multiprocessing build fails when configure is passed
- --without-threads argument. When this occurs, _multiprocessing will
- be disabled, and not compiled.
+- Issue #13159: FileIO and BZ2Compressor/BZ2Decompressor now use a linear-time
+ buffer growth strategy instead of a quadratic-time one.
-- Issue #5008: When a file is opened in append mode with the new IO library,
- do an explicit seek to the end of file (so that e.g. tell() returns the
- file size rather than 0). This is consistent with the behaviour of the
- traditional 2.x file object.
+- Issue #10141: socket: Add SocketCAN (PF_CAN) support. Initial patch by
+ Matthias Fuchs, updated by Tiago Gonçalves.
-- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
- parameter was set.
+- Issue #13070: Fix a crash when a TextIOWrapper caught in a reference cycle
+ would be finalized after the reference to its underlying BufferedRWPair's
+ writer got cleared by the GC.
-- Issue #4842: Always append a trailing 'L' when pickling longs using
- pickle protocol 0. When reading, the 'L' is optional.
+- Issue #12881: ctypes: Fix segfault with large structure field names.
-- Add the importlib package.
+- Issue #13058: ossaudiodev: fix a file descriptor leak on error. Patch by
+ Thomas Jarosch.
-- Issue #4301: Patch the logging module to add processName support, remove
- _check_logger_class from multiprocessing.
+- Issue #13013: ctypes: Fix a reference leak in PyCArrayType_from_ctype.
+ Thanks to Suman Saha for finding the bug and providing a patch.
-- Issue #3325: Remove python2.x try: except: imports for old cPickle from
- multiprocessing.
+- Issue #13022: Fix: _multiprocessing.recvfd() doesn't check that
+ file descriptor was actually received.
-- Issue #4959: inspect.formatargspec now works for keyword only arguments
- without defaults.
+- Issue #1172711: Add 'long long' support to the array module.
+ Initial patch by Oren Tirosh and Hirokazu Yamamoto.
-- Issue #3321: ``_multiprocessing.Connection()`` doesn't check handle; added checks
- for Unix machines for negative handles and large int handles. Without this check
- it is possible to segfault the interpreter.
+- Issue #12483: ctypes: Fix a crash when the destruction of a callback
+ object triggers the garbage collector.
-- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
- in sharedctypes.py.
+- Issue #12950: Fix passing file descriptors in multiprocessing, under
+ OpenIndiana/Illumos.
-- Issue #1225107: inspect.isclass() returned True for instances with a custom
- __getattr__.
+- Issue #12764: Fix a crash in ctypes when the name of a Structure field is not
+ a string.
-- Issue #3826 and #4791: The socket module now closes the underlying socket
- appropriately when it is being used via socket.makefile() objects
- rather than delaying the close by waiting for garbage collection to do it.
+- Issue #11241: subclasses of ctypes.Array can now be subclassed.
-- Issue #1696199: Add collections.Counter() for rapid and convenient
- counting.
+- Issue #9651: Fix a crash when ctypes.create_string_buffer(0) was passed to
+ some functions like file.write().
-- Issue #3860: GzipFile and BZ2File now support the context manager protocol.
+- Issue #10309: Define _GNU_SOURCE so that mremap() gets the proper
+ signature. Without this, architectures where sizeof void* != sizeof int are
+ broken. Patch given by Hallvard B Furuseth.
-- Issue #4867: Fixed a crash in ctypes when passing a string to a
- function without defining argtypes.
+- Issue #12051: Fix segfault in json.dumps() while encoding highly-nested
+ objects using the C accelerations.
-- Issue #4272: Add an optional argument to the GzipFile constructor to override
- the timestamp in the gzip stream. The default value remains the current time.
- The information can be used by e.g. gunzip when decompressing. Patch by
- Jacques Frechet.
+- Issue #12017: Fix segfault in json.loads() while decoding highly-nested
+ objects using the C accelerations.
-- Restore Python 2.3 compatibility for decimal.py.
+- Issue #1838: Prevent segfault in ctypes, when _as_parameter_ on a class is set
+ to an instance of the class.
-- Issue #3638: Remove functions from _tkinter module level that depend on
- TkappObject to work with multiple threads.
+Tests
+-----
-- Issue #4718: Adapt the wsgiref package so that it actually works with
- Python 3.x, in accordance with the `official amendments of the spec
- <http://www.wsgi.org/wsgi/Amendments_1.0>`_.
+- Issue #11689: Fix a variable scoping error in an sqlite3 test
-- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
- to the decimal module.
+- Issue #13786: Remove unimplemented 'trace' long option from regrtest.py.
-- Fractions.from_float() no longer loses precision for integers too big to
- cast as floats.
+- Issue #13725: Fix regrtest to recognize the documented -d flag.
+ Patch by Erno Tukia.
-- Issue #4812: add missing underscore prefix to some internal-use-only
- constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
+- Issue #13304: Skip test case if user site-packages disabled (-s or
+ PYTHONNOUSERSITE). (Patch by Carl Meyer)
-- Issue #4790: The nsmallest() and nlargest() functions in the heapq module
- did unnecessary work in the common case where no key function was specified.
+- Issue #5661: Add a test for ECONNRESET/EPIPE handling to test_asyncore. Patch
+ by Xavier de Gaye.
-- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
- the function is not a generator.
+- Issue #13218: Fix test_ssl failures on Debian/Ubuntu.
-- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
- no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
+- Re-enable lib2to3's test_parser.py tests, though with an expected failure
+ (see issue 13125).
-- Issue #4646: distutils was choking on empty options arg in the setup
- function. Original patch by Thomas Heller.
+- Issue #12656: Add tests for IPv6 and Unix sockets to test_asyncore.
-- Issue #3767: Convert Tk object to string in tkColorChooser.
+- Issue #6484: Add unit tests for mailcap module (patch by Gregory Nofi)
-- Issue #3248: Allow placing ScrolledText in a PanedWindow.
+- Issue #11651: Improve the Makefile test targets to run more of the test suite
+ more quickly. The --multiprocess option is now enabled by default, reducing
+ the amount of time needed to run the tests. "make test" and "make quicktest"
+ now include some resource-intensive tests, but no longer run the test suite
+ twice to check for bugs in .pyc generation. Tools/scripts/run_test.py provides
+ an easy platform-independent way to run test suite with sensible defaults.
-- Issue #4444: Allow assertRaises() to be used as a context handler, so that
- the code under test can be written inline if more practical.
+- Issue #12331: The test suite for the packaging module can now run from an
+ installed Python.
-- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
- works as expected in the interactive environment.
+- Issue #12331: The test suite for lib2to3 can now run from an installed
+ Python.
-- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
- Gabriel Genellina.
+- Issue #12626: In regrtest, allow to filter tests using a glob filter
+ with the ``-m`` (or ``--match``) option. This works with all test cases
+ using the unittest module. This is useful with long test suites
+ such as test_io or test_subprocess.
-- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
- boundary.
+- Issue #12624: It is now possible to fail after the first failure when
+ running in verbose mode (``-v`` or ``-W``), by using the ``--failfast``
+ (or ``-G``) option to regrtest. This is useful with long test suites
+ such as test_io or test_subprocess.
-- Issue #4223: inspect.getsource() will now correctly display source code
- for packages loaded via zipimport (or any other conformant PEP 302
- loader). Original patch by Alexander Belopolsky.
+- Issue #12587: Correct faulty test file and reference in test_tokenize.
+ (Patch by Robert Xiao)
-- Issue #4201: pdb can now access and display source code loaded via
- zipimport (or any other conformant PEP 302 loader). Original patch by
- Alexander Belopolsky.
+- Issue #12573: Add resource checks for dangling Thread and Process objects.
-- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
- 302 conformant loader) will now work correctly in most cases (they
- are still subject to the constraints that exist for all code running
- from inside a module loaded via a PEP 302 loader and attempting to
- perform IO operations based on __file__). Original patch by
- Alexander Belopolsky.
+- Issue #12549: Correct test_platform to not fail when OS X returns 'x86_64'
+ as the processor type on some Mac systems.
-- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
- allows backporting to maintenance branches. Original patch by
- Alexander Belopolsky.
+- Skip network tests when getaddrinfo() returns EAI_AGAIN, meaning a temporary
+ failure in name resolution.
-- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
- a non-ASCII letter.
+- Issue #11812: Solve transient socket failure to connect to 'localhost'
+ in test_telnetlib.py.
-- Issue #4616: TarFile.utime(): Restore directory times on Windows.
+- Solved a potential deadlock in test_telnetlib.py. Related to issue #11812.
-- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
- codec cannot be found. This is for compatibility with the builtin behavior.
+- Avoid failing in test_robotparser when mueblesmoraleda.com is flaky and
+ an overzealous DNS service (e.g. OpenDNS) redirects to a placeholder
+ Web site.
-- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
- give correct results in the case where one argument is a quiet NaN
- and the other is a finite number that requires rounding.
+- Avoid failing in test_urllibnet.test_bad_address when some overzealous
+ DNS service (e.g. OpenDNS) resolves a non-existent domain name. The test
+ is now skipped instead.
-- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
- libs.
+- Issue #12440: When testing whether some bits in SSLContext.options can be
+ reset, check the version of the OpenSSL headers Python was compiled against,
+ rather than the runtime version of the OpenSSL library.
-- Added the subprocess.check_call_output() convenience function to get output
- from a subprocess on success or raise an exception on error.
+- Issue #11512: Add a test suite for the cgitb module. Patch by Robbie Clemons.
-- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
- support unusual filenames (such as those containing semi-colons) in
- Content-Disposition headers.
+- Issue #12497: Install test/data to prevent failures of the various codecmaps
+ tests.
-- Issue #4384: Added logging integration with warnings module using
- captureWarnings(). This change includes a NullHandler which does nothing;
- it will be of use to library developers who want to avoid the "No handlers
- could be found for logger XXX" message which can appear if the library user
- doesn't configure logging.
+- Issue #12496: Install test/capath directory to prevent test_connect_capath
+ testcase failure in test_ssl.
-- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
- exception.
+- Issue #12469: Run wakeup and pending signal tests in a subprocess to run the
+ test in a fresh process with only one thread and to not change signal
+ handling of the parent process.
-- Issue #4529: fix the parser module's validation of try-except-finally
- statements.
+- Issue #8716: Avoid crashes caused by Aqua Tk on OSX when attempting to run
+ test_tk or test_ttk_guionly under a username that is not currently logged
+ in to the console windowserver (as may be the case under buildbot or ssh).
-- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
- not a malformed option.
+- Issue #12407: Explicitly skip test_capi.EmbeddingTest under Windows.
-- Added the subprocess.check_output() convenience function to get output
- from a subprocess on success or raise an exception on error.
+- Issue #12400: regrtest -W doesn't rerun the tests twice anymore, but captures
+ the output and displays it on failure instead. regrtest -v doesn't print the
+ error twice anymore if there is only one error.
-- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
- the corresponding tests now pass.
+- Issue #12141: Install copies of template C module file so that
+ test_build_ext of test_distutils and test_command_build_ext of
+ test_packaging are no longer silently skipped when
+ run outside of a build directory.
-- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
- it was calling the wrong open() function.
+- Issue #8746: Add additional tests for os.chflags() and os.lchflags().
+ Patch by Garrett Cooper.
-- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
- support unusual filenames (such as those containing semi-colons) in
- Content-Disposition headers.
+- Issue #10736: Fix test_ttk test_widgets failures with Cocoa Tk 8.5.9
+ 2.8 + on Mac OS X. (Patch by Ronald Oussoren)
-- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
- biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
+- Issue #12057: Add tests for ISO 2022 codecs (iso2022_jp, iso2022_jp_2,
+ iso2022_kr).
-- Issue #5104: The socket module now raises OverflowError when 16-bit port and
- protocol numbers are supplied outside the allowed 0-65536 range on bind()
- and getservbyport().
+- Issue #12096: Fix a race condition in test_threading.test_waitfor(). Patch
+ written by Charles-François Natali.
-- Windows locale mapping updated to Vista.
+- Issue #11614: import __hello__ prints "Hello World!". Patch written by
+ Andreas Stührk.
-Tools/Demos
------------
+- Issue #5723: Improve json tests to be executed with and without accelerations.
-- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
- and make it 2.6-compatible.
+- Issue #12041: Make test_wait3 more robust.
-- Ttk demos added in Demo/tkinter/ttk/
+- Issue #11873: Change regex in test_compileall to fix occasional failures when
+ when the randomly generated temporary path happened to match the regex.
-- Issue #4677: add two list comprehension tests to pybench.
+- Issue #11958: Fix FTP tests for IPv6, bind to "::1" instead of "localhost".
+ Patch written by Charles-Francois Natali.
+- Issue #8407, #11859: Fix tests of test_io using threads and an alarm: use
+ pthread_sigmask() to ensure that the SIGALRM signal is received by the main
+ thread.
-Build
------
+- Issue #11811: Factor out detection of IPv6 support on the current host
+ and make it available as ``test.support.IPV6_ENABLED``. Patch by
+ Charles-François Natali.
-- Issue #6094: Build correctly with Subversion 1.7.
+- Issue #10914: Add a minimal embedding test to test_capi.
-- Issue #5847: Remove -n switch on "Edit with IDLE" menu item.
+- Issue #11223: Skip test_lock_acquire_interruption() and
+ test_rlock_acquire_interruption() of test_threadsignals if a thread lock is
+ implemented using a POSIX mutex and a POSIX condition variable. A POSIX
+ condition variable cannot be interrupted by a signal (e.g. on Linux, the
+ futex system call is restarted).
-- Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
- linker, rather than always exit successfully. Patch by Floris Bruynooghe.
+- Issue #11790: Fix sporadic failures in test_multiprocessing.WithProcessesTestCondition.
-- Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
- the order that backends for the dbm extension are checked.
+- Fix possible "file already exists" error when running the tests in parallel.
-- Link the shared python library with $(MODLIBS).
+- Issue #11719: Fix message about unexpected test_msilib skip on non-Windows
+ platforms. Patch by Nadeem Vawda.
-- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
+- Issue #11727: Add a --timeout option to regrtest: if a test takes more than
+ TIMEOUT seconds, dumps the traceback of all threads and exits.
-- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
+- Issue #11653: fix -W with -j in regrtest.
-- Issue #4895: Use _strdup on Windows CE.
+- The email test suite now lives in the Lib/test/test_email package. The test
+ harness code has also been modernized to allow use of new unittest features.
-- Issue #4472: "configure --enable-shared" now works on OSX
+- regrtest now discovers test packages as well as test modules.
-- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
+- Issue #11577: improve test coverage of binhex.py. Patch by Arkady Koplyarov.
-- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
+- New test_crashers added to exercise the scripts in the Lib/test/crashers
+ directory and confirm they fail as expected
-- Issue #4289: Remove Cancel button from AdvancedDlg.
+- Issue #11578: added test for the timeit module. Patch by Michael Henry.
-- Issue #1656675: Register a drop handler for .py* files on Windows.
+- Issue #11503: improve test coverage of posixpath.py. Patch by Evan Dandrea.
-- Issue #4120: Exclude manifest from extension modules in VS2008.
+- Issue #11505: improves test coverage of string.py, increases granularity of
+ string.Formatter tests. Initial patch by Alicia Arlen.
-- Issue #4091: Install pythonxy.dll in system32 again.
+- Issue #11548: Improve test coverage of the shutil module. Patch by
+ Evan Dandrea.
-- Issue #4018: Disable "for me" installations on Vista.
+- Issue #11554: Reactivated test_email_codecs.
-- Issue #3758: Add ``patchcheck`` build target to .PHONY.
+- Issue #11505: improves test coverage of string.py. Patch by Alicia
+ Arlen
-- Issue #4204: Fixed module build errors on FreeBSD 4.
+- Issue #11490: test_subprocess:test_leaking_fds_on_error no longer gives a
+ false positive if the last directory in the path is inaccessible.
+- Issue #11223: Fix test_threadsignals to fail, not hang, when the
+ non-semaphore implementation of locks is used under POSIX.
-C-API
------
+- Issue #10911: Add tests on CGI with non-ASCII characters. Patch written by
+ Pierre Quentel.
-- Issue #6624: yArg_ParseTuple with "s" format when parsing argument with
- NUL: Bogus TypeError detail string.
+- Issue #9931: Fix hangs in GUI tests under Windows in certain conditions.
+ Patch by Hirokazu Yamamoto.
-- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
- for negative arguments. Previously, it raised TypeError.
+- Issue #10512: Properly close sockets under test.test_cgi.
-- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
+- Issue #10992: Make tests pass under coverage.
-- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
- the GIL is released, or owned by another thread.
+- Issue #10826: Prevent sporadic failure in test_subprocess on Solaris due
+ to open door files.
-- Issue #4122: On Windows, fix a compilation error when using the
- Py_UNICODE_ISSPACE macro in an extension module.
+- Issue #10990: Prevent tests from clobbering a set trace function.
+C-API
+-----
-Extension Modules
------------------
+- Add PyObject_GenericGetDict and PyObject_GeneriSetDict. They are generic
+ implementations for the getter and setter of a ``__dict__`` descriptor of C
+ types.
-- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
- supporting objects as input no matter how it was compiled (built in
- implementations or external openssl library).
+- Issue #13727: Add 3 macros to access PyDateTime_Delta members:
+ PyDateTime_DELTA_GET_DAYS, PyDateTime_DELTA_GET_SECONDS,
+ PyDateTime_DELTA_GET_MICROSECONDS.
-- Issue #4397: Fix occasional test_socket failure on OS X.
+- Issue #10542: Add 4 macros to work with surrogates: Py_UNICODE_IS_SURROGATE,
+ Py_UNICODE_IS_HIGH_SURROGATE, Py_UNICODE_IS_LOW_SURROGATE,
+ Py_UNICODE_JOIN_SURROGATES.
-- Issue #4279: Fix build of parsermodule under Cygwin.
+- Issue #12724: Add Py_RETURN_NOTIMPLEMENTED macro for returning NotImplemented.
-- Issue #4751: hashlib now releases the GIL when hashing large buffers
- (with a hardwired threshold of 2048 bytes), allowing better parallelization
- on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.
+- PY_PATCHLEVEL_REVISION has been removed, since it's meaningless with
+ Mercurial.
-- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
+- Issue #12173: The first argument of PyImport_ImportModuleLevel is now `const
+ char *` instead of `char *`.
-- Issue #4738: Each zlib object now has a separate lock, allowing to compress
- or decompress several streams at once on multi-CPU systems. Also, the GIL
- is now released when computing the CRC of a large buffer. Patch by ebfe.
+- Issue #12380: PyArg_ParseTuple now accepts a bytearray for the 'c' format.
-- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
+Documentation
+-------------
-- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
+- Issue #13498: Clarify docs of os.makedirs()'s exist_ok argument. Done with
+ great native-speaker help from R. David Murray.
-- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
- OpenBSD.
+- Issues #13491 and #13995: Fix many errors in sqlite3 documentation.
+ Initial patch for #13491 by Johannes Vogel.
-- Issue #4583: array.array would not always prohibit resizing when a buffer
- has been exported, resulting in an interpreter crash when accessing the
- buffer.
+- Issue #13402: Document absoluteness of sys.executable.
+- Issue #13883: PYTHONCASEOK also works on OS X.
-- Issue #5228: Make functools.partial objects can now be pickled.
+- Issue #9021: Add an introduction to the copy module documentation.
-Tests
------
+- Issue #6005: Examples in the socket library documentation use sendall, where
+ relevant, instead send method.
-- Issue #6152: New option '-j'/'--multiprocess' for regrtest allows running
- regression tests in parallel, shortening the total runtime.
+- Issue #12798: Updated the mimetypes documentation.
-- Issue #5450: Moved tests involving loading tk from Lib/test/test_tcl to
- Lib/tkinter/test/test_tkinter/test_loadtk. With this, these tests demonstrate
- the same behaviour as test_ttkguionly (and now also test_tk) which is to
- skip the tests if DISPLAY is defined but can't be used.
+- Issue #12949: Document the kwonlyargcount argument for the PyCode_New
+ C API function.
-- regrtest no longer treats ImportError as equivalent to SkipTest. Imports
- that should cause a test to be skipped are now done using import_module
- from test support, which does the conversion.
+- Issue #13513: Fix io.IOBase documentation to correctly link to the
+ io.IOBase.readline method instead of the readline module.
-- Issue #5083: New 'gui' resource for regrtest.
+- Issue #13237: Reorganise subprocess documentation to emphasise convenience
+ functions and the most commonly needed arguments to Popen.
+- Issue #13141: Demonstrate recommended style for socketserver examples.
-Docs
-----
+- Issue #11818: Fix tempfile examples for Python 3.
**(For information about older versions, consult the HISTORY file.)**
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