Core and Builtins
-----------------
-- Issue #21274: Define PATH_MAX for GNU/Hurd in Python/pythonrun.c.
+- Issue #23285: PEP 475 - EINTR handling.
-- Issue #21209: Fix sending tuples to custom generator objects with the yield
- from syntax.
+- Issue #22735: Fix many edge cases (including crashes) involving custom mro()
+ implementations.
-- Issue #21134: Fix segfault when str is called on an uninitialized
- UnicodeEncodeError, UnicodeDecodeError, or UnicodeTranslateError object.
+- Issue #22896: Avoid using PyObject_AsCharBuffer(), PyObject_AsReadBuffer()
+ and PyObject_AsWriteBuffer().
-- Issue #19537: Fix PyUnicode_DATA() alignment under m68k. Patch by
- Andreas Schwab.
+- Issue #21295: Revert some changes (issue #16795) to AST line numbers and
+ column offsets that constituted a regression.
-- Issue #20929: Add a type cast to avoid shifting a negative number.
+- Issue #22986: Allow changing an object's __class__ between a dynamic type and
+ static type in some cases.
-- Issue #20731: Properly position in source code files even if they
- are opened in text mode. Patch by Serhiy Storchaka.
+- Issue #15859: PyUnicode_EncodeFSDefault(), PyUnicode_EncodeMBCS() and
+ PyUnicode_EncodeCodePage() now raise an exception if the object is not an
+ Unicode object. For PyUnicode_EncodeFSDefault(), it was already the case on
+ platforms other than Windows. Patch written by Campbell Barton.
-- Issue #20637: Key-sharing now also works for instance dictionaries of
- subclasses. Patch by Peter Ingebretson.
+- Issue #21408: The default __ne__() now returns NotImplemented if __eq__()
+ returned NotImplemented. Original patch by Martin Panter.
-- Issue #12546: Allow \x00 to be used as a fill character when using str, int,
- float, and complex __format__ methods.
+- Issue #23321: Fixed a crash in str.decode() when error handler returned
+ replacment string longer than mailformed input data.
-- Issue #13598: Modify string.Formatter to support auto-numbering of
- replacement fields. It now matches the behavior of str.format() in
- this regard. Patches by Phil Elson and Ramchandra Apte.
+- Issue #22286: The "backslashreplace" error handlers now works with
+ decoding and translating.
-Library
--------
+- Issue #23253: Delay-load ShellExecute[AW] in os.startfile for reduced
+ startup overhead on Windows.
-- Issue #21088: Bugfix for curses.window.addch() regression in 3.4.0.
- In porting to Argument Clinic, the first two arguments were reversed.
+- Issue #22038: pyatomic.h now uses stdatomic.h or GCC built-in functions for
+ atomic memory access if available. Patch written by Vitor de Lima and Gustavo
+ Temple.
-- Issue #21469: Reduced the risk of false positives in robotparser by
- checking to make sure that robots.txt has been read or does not exist
- prior to returning True in can_fetch().
+- Issue #20284: %-interpolation (aka printf) formatting added for bytes and
+ bytearray.
-- Issue #21321: itertools.islice() now releases the reference to the source
- iterator when the slice is exhausted. Patch by Anton Afanasyev.
+- Issue #23048: Fix jumping out of an infinite while loop in the pdb.
-- Issue #9815: assertRaises now tries to clear references to local variables
- in the exception's traceback.
+- Issue #20335: bytes constructor now raises TypeError when encoding or errors
+ is specified with non-string argument. Based on patch by Renaud Blanch.
-- Issue #13204: Calling sys.flags.__new__ would crash the interpreter,
- now it raises a TypeError.
+- Issue #22834: If the current working directory ends up being set to a
+ non-existent directory then import will no longer raise FileNotFoundError.
-- Issue #19385: Make operations on a closed dbm.dumb database always raise the
- same exception.
+- Issue #22869: Move the interpreter startup & shutdown code to a new
+ dedicated pylifecycle.c module
-- Issue #21207: Detect when the os.urandom cached fd has been closed or
- replaced, and open it anew.
+- Issue #22847: Improve method cache efficiency.
-- Issue #21291: subprocess's Popen.wait() is now thread safe so that
- multiple threads may be calling wait() or poll() on a Popen instance
- at the same time without losing the Popen.returncode value.
+- Issue #22335: Fix crash when trying to enlarge a bytearray to 0x7fffffff
+ bytes on a 32-bit platform.
-- Issue #21127: Path objects can now be instantiated from str subclass
- instances (such as ``numpy.str_``).
+- Issue #22653: Fix an assertion failure in debug mode when doing a reentrant
+ dict insertion in debug mode.
-- Issue #15002: urllib.response object to use _TemporaryFileWrapper (and
- _TemporaryFileCloser) facility. Provides a better way to handle file
- descriptor close. Patch contributed by Christian Theune.
+- Issue #22643: Fix integer overflow in Unicode case operations (upper, lower,
+ title, swapcase, casefold).
-- Issue #12220: mindom now raises a custom ValueError indicating it doesn't
- support spaces in URIs instead of letting a 'split' ValueError bubble up.
+- Issue #17636: Circular imports involving relative imports are now
+ supported.
-- Issue #21239: patch.stopall() didn't work deterministically when the same
- name was patched more than once.
+- Issue #22604: Fix assertion error in debug mode when dividing a complex
+ number by (nan+0j).
-- Issue #21222: Passing name keyword argument to mock.create_autospec now
- works.
+- Issue #21052: Do not raise ImportWarning when sys.path_hooks or sys.meta_path
+ are set to None.
-- Issue #21197: Add lib64 -> lib symlink in venvs on 64-bit non-OS X POSIX.
+- Issue #16518: Use 'bytes-like object required' in error messages that
+ previously used the far more cryptic "'x' does not support the buffer
+ protocol.
-- Issue #17498: Some SMTP servers disconnect after certain errors, violating
- strict RFC conformance. Instead of losing the error code when we issue the
- subsequent RSET, smtplib now returns the error code and defers raising the
- SMTPServerDisconnected error until the next command is issued.
+- Issue #22470: Fixed integer overflow issues in "backslashreplace",
+ "xmlcharrefreplace", and "surrogatepass" error handlers.
-- Issue #17826: setting an iterable side_effect on a mock function created by
- create_autospec now works. Patch by Kushal Das.
+- Issue #22540: speed up `PyObject_IsInstance` and `PyObject_IsSubclass` in the
+ common case that the second argument has metaclass `type`.
-- Issue #7776: Fix ``Host:`` header and reconnection when using
- http.client.HTTPConnection.set_tunnel(). Patch by Nikolaus Rath.
+- Issue #18711: Add a new `PyErr_FormatV` function, similar to `PyErr_Format`
+ but accepting a `va_list` argument.
-- Issue #20968: unittest.mock.MagicMock now supports division.
- Patch by Johannes Baiter.
+- Issue #22520: Fix overflow checking when generating the repr of a unicode
+ object.
-- Fix arbitrary memory access in JSONDecoder.raw_decode with a negative second
- parameter. Bug reported by Guido Vranken.
+- Issue #22519: Fix overflow checking in PyBytes_Repr.
-- Issue #21169: getpass now handles non-ascii characters that the
- input stream encoding cannot encode by re-encoding using the
- replace error handler.
+- Issue #22518: Fix integer overflow issues in latin-1 encoding.
-- Issue #21171: Fixed undocumented filter API of the rot13 codec.
- Patch by Berker Peksag.
+- Issue #16324: _charset parameter of MIMEText now also accepts
+ email.charset.Charset instances. Initial patch by Claude Paroz.
-- Issue #21172: isinstance check relaxed from dict to collections.Mapping.
+- Issue #1764286: Fix inspect.getsource() to support decorated functions.
+ Patch by Claudiu Popa.
-- Issue #21155: asyncio.EventLoop.create_unix_server() now raises a ValueError
- if path and sock are specified at the same time.
+- Issue #18554: os.__all__ includes posix functions.
-- Issue #21149: Improved thread-safety in logging cleanup during interpreter
- shutdown. Thanks to Devin Jeanpierre for the patch.
+- Issue #21391: Use os.path.abspath in the shutil module.
-- Issue #20145: `assertRaisesRegex` and `assertWarnsRegex` now raise a
- TypeError if the second argument is not a string or compiled regex.
+- Issue #11471: avoid generating a JUMP_FORWARD instruction at the end of
+ an if-block if there is no else-clause. Original patch by Eugene Toder.
-- Issue #21058: Fix a leak of file descriptor in
- :func:`tempfile.NamedTemporaryFile`, close the file descriptor if
- :func:`io.open` fails
+- Issue #22215: Now ValueError is raised instead of TypeError when str or bytes
+ argument contains not permitted null character or byte.
-- Issue #21200: Return None from pkgutil.get_loader() when __spec__ is missing.
+- Issue #22258: Fix the internal function set_inheritable() on Illumos.
+ This platform exposes the function ``ioctl(FIOCLEX)``, but calling it fails
+ with errno is ENOTTY: "Inappropriate ioctl for device". set_inheritable()
+ now falls back to the slower ``fcntl()`` (``F_GETFD`` and then ``F_SETFD``).
-- Issue #21013: Enhance ssl.create_default_context() when used for server side
- sockets to provide better security by default.
+- Issue #21389: Displaying the __qualname__ of the underlying function in the
+ repr of a bound method.
-- Issue #20633: Replace relative import by absolute import.
+- Issue #22206: Using pthread, PyThread_create_key() now sets errno to ENOMEM
+ and returns -1 (error) on integer overflow.
-- Issue #20980: Stop wrapping exception when using ThreadPool.
+- Issue #20184: Argument Clinic based signature introspection added for
+ 30 of the builtin functions.
-- Issue #21082: In os.makedirs, do not set the process-wide umask. Note this
- changes behavior of makedirs when exist_ok=True.
+- Issue #22116: C functions and methods (of the 'builtin_function_or_method'
+ type) can now be weakref'ed. Patch by Wei Wu.
-- Issue #20990: Fix issues found by pyflakes for multiprocessing.
+- Issue #22077: Improve index error messages for bytearrays, bytes, lists,
+ and tuples by adding 'or slices'. Added ', not <typename' for bytearrays.
+ Original patch by Claudiu Popa.
-- Issue #21015: SSL contexts will now automatically select an elliptic
- curve for ECDH key exchange on OpenSSL 1.0.2 and later, and otherwise
- default to "prime256v1".
+- Issue #20179: Apply Argument Clinic to bytes and bytearray.
+ Patch by Tal Einat.
-- Issue #20995: Enhance default ciphers used by the ssl module to enable
- better security an prioritize perfect forward secrecy.
+- Issue #22082: Clear interned strings in slotdefs.
-- Issue #20884: Don't assume that __file__ is defined on importlib.__init__.
+- Upgrade Unicode database to Unicode 7.0.0.
-- Issue #21499: Ignore __builtins__ in several test_importlib.test_api tests.
+- Issue #21897: Fix a crash with the f_locals attribute with closure
+ variables when frame.clear() has been called.
-- Issue #20879: Delay the initialization of encoding and decoding tables for
- base32, ascii85 and base85 codecs in the base64 module, and delay the
- initialization of the unquote_to_bytes() table of the urllib.parse module, to
- not waste memory if these modules are not used.
+- Issue #21205: Add a new ``__qualname__`` attribute to generator, the
+ qualified name, and use it in the representation of a generator
+ (``repr(gen)``). The default name of the generator (``__name__`` attribute)
+ is now get from the function instead of the code. Use ``gen.gi_code.co_name``
+ to get the name of the code.
-- Issue #19157: Include the broadcast address in the usuable hosts for IPv6
- in ipaddress.
+- Issue #21669: With the aid of heuristics in SyntaxError.__init__, the
+ parser now attempts to generate more meaningful (or at least more search
+ engine friendly) error messages when "exec" and "print" are used as
+ statements.
- - Issue #21642: If the conditional if-else expression, allow an integer written
-- Issue #11599: When an external command (e.g. compiler) fails, distutils now
- prints out the whole command line (instead of just the command name) if the
- environment variable DISTUTILS_DEBUG is set.
++- Issue #21642: In the conditional if-else expression, allow an integer written
+ with no space between itself and the ``else`` keyword (e.g. ``True if 42else
+ False``) to be valid syntax.
-- Issue #4931: distutils should not produce unhelpful "error: None" messages
- anymore. distutils.util.grok_environment_error is kept but doc-deprecated.
+- Issue #21523: Fix over-pessimistic computation of the stack effect of
+ some opcodes in the compiler. This also fixes a quadratic compilation
+ time issue noticeable when compiling code with a large number of "and"
+ and "or" operators.
-- Issue #20875: Prevent possible gzip "'read' is not defined" NameError.
- Patch by Claudiu Popa.
+- Issue #21418: Fix a crash in the builtin function super() when called without
+ argument and without current frame (ex: embedded Python).
-- Issue #11558: ``email.message.Message.attach`` now returns a more
- useful error message if ``attach`` is called on a message for which
- ``is_multipart`` is False.
+- Issue #21425: Fix flushing of standard streams in the interactive
+ interpreter.
-- Issue #20283: RE pattern methods now accept the string keyword parameters
- as documented. The pattern and source keyword parameters are left as
- deprecated aliases.
+- Issue #21435: In rare cases, when running finalizers on objects in cyclic
+ trash a bad pointer dereference could occur due to a subtle flaw in
+ internal iteration logic.
-- Issue #20778: Fix modulefinder to work with bytecode-only modules.
+- Issue #21377: PyBytes_Concat() now tries to concatenate in-place when the
+ first argument has a reference count of 1. Patch by Nikolaus Rath.
-- Issue #20791: copy.copy() now doesn't make a copy when the input is
- a bytes object. Initial patch by Peter Otten.
+- Issue #20355: -W command line options now have higher priority than the
+ PYTHONWARNINGS environment variable. Patch by Arfrever.
-- Issue #19748: On AIX, time.mktime() now raises an OverflowError for year
- outsize range [1902; 2037].
+- Issue #21274: Define PATH_MAX for GNU/Hurd in Python/pythonrun.c.
-- Issue #20816: Fix inspect.getcallargs() to raise correct TypeError for
- missing keyword-only arguments. Patch by Jeremiah Lowin.
+- Issue #20904: Support setting FPU precision on m68k.
-- Issue #20817: Fix inspect.getcallargs() to fail correctly if more
- than 3 arguments are missing. Patch by Jeremiah Lowin.
+- Issue #21209: Fix sending tuples to custom generator objects with the yield
+ from syntax.
-- Issue #6676: Ensure a meaningful exception is raised when attempting
- to parse more than one XML document per pyexpat xmlparser instance.
- (Original patches by Hirokazu Yamamoto and Amaury Forgeot d'Arc, with
- suggested wording by David Gutteridge)
+- Issue #21193: pow(a, b, c) now raises ValueError rather than TypeError when b
+ is negative. Patch by Josh Rosenberg.
-- Issue #21117: Fix inspect.signature to better support functools.partial.
- Due to the specifics of functools.partial implementation,
- positional-or-keyword arguments passed as keyword arguments become
- keyword-only.
+- PEP 465 and Issue #21176: Add the '@' operator for matrix multiplication.
-- Issue #21209: Fix asyncio.tasks.CoroWrapper to workaround a bug
- in yield-from implementation in CPythons prior to 3.4.1.
+- Issue #21134: Fix segfault when str is called on an uninitialized
+ UnicodeEncodeError, UnicodeDecodeError, or UnicodeTranslateError object.
-- asyncio: Add gi_{frame,running,code} properties to CoroWrapper
- (upstream issue #163).
+- Issue #19537: Fix PyUnicode_DATA() alignment under m68k. Patch by
+ Andreas Schwab.
-- Issue #21311: Avoid exception in _osx_support with non-standard compiler
- configurations. Patch by John Szakmeister.
+- Issue #20929: Add a type cast to avoid shifting a negative number.
-- Issue #11571: Ensure that the turtle window becomes the topmost window
- when launched on OS X.
+- Issue #20731: Properly position in source code files even if they
+ are opened in text mode. Patch by Serhiy Storchaka.
-Extension Modules
------------------
+- Issue #20637: Key-sharing now also works for instance dictionaries of
+ subclasses. Patch by Peter Ingebretson.
-- Issue #21276: posixmodule: Don't define USE_XATTRS on KFreeBSD and the Hurd.
+- Issue #8297: Attributes missing from modules now include the module name
+ in the error text. Original patch by ysj.ray.
-- Issue #21226: Set up modules properly in PyImport_ExecCodeModuleObject
- (and friends).
+- Issue #19995: %c, %o, %x, and %X now raise TypeError on non-integer input.
-IDLE
-----
+- Issue #19655: The ASDL parser - used by the build process to generate code for
+ managing the Python AST in C - was rewritten. The new parser is self contained
+ and does not require to carry long the spark.py parser-generator library;
+ spark.py was removed from the source base.
-- Issue #21139: Change default paragraph width to 72, the PEP 8 recommendation.
+- Issue #12546: Allow \x00 to be used as a fill character when using str, int,
+ float, and complex __format__ methods.
-- Issue #21284: Paragraph reformat test passes after user changes reformat width.
+- Issue #20480: Add ipaddress.reverse_pointer. Patch by Leon Weber.
-- Issue #17654: Ensure IDLE menus are customized properly on OS X for
- non-framework builds and for all variants of Tk.
+- Issue #13598: Modify string.Formatter to support auto-numbering of
+ replacement fields. It now matches the behavior of str.format() in
+ this regard. Patches by Phil Elson and Ramchandra Apte.
-Build
------
+- Issue #8931: Make alternate formatting ('#') for type 'c' raise an
+ exception. In versions prior to 3.5, '#' with 'c' had no effect. Now
+ specifying it is an error. Patch by Torsten Landschoff.
-- The Windows build now includes OpenSSL 1.0.1g
+- Issue #23165: Perform overflow checks before allocating memory in the
+ _Py_char2wchar function.
-- Issue #21285: Refactor and fix curses configure check to always search
- in a ncursesw directory.
+Library
+-------
-- Issue #15234: For BerkelyDB and Sqlite, only add the found library and
- include directories if they aren't already being searched. This avoids
- an explicit runtime library dependency.
+- Issue #23399: pyvenv creates relative symlinks where possible.
-- Issue #20644: OS X installer build support for documentation build changes
- in 3.4.1: assume externally supplied sphinx-build is available in /usr/bin.
+- Issue #20289: cgi.FieldStorage() now supports the context management
+ protocol.
-C API
------
+- Issue #13128: Print response headers for CONNECT requests when debuglevel
+ > 0. Patch by Demian Brecht.
-- Issue #20942: PyImport_ImportFrozenModuleObject() no longer sets __file__ to
- match what importlib does; this affects _frozen_importlib as well as any
- module loaded using imp.init_frozen().
+- Issue #15381: Optimized io.BytesIO to make less allocations and copyings.
-Documentation
--------------
+- Issue #22818: Splitting on a pattern that could match an empty string now
+ raises a warning. Patterns that can only match empty strings are now
+ rejected.
-- Issue #17386: Expanded functionality of the ``Doc/make.bat`` script to make
- it much more comparable to ``Doc/Makefile``.
+- Issue #23099: Closing io.BytesIO with exported buffer is rejected now to
+ prevent corrupting exported buffer.
-- Issue #21043: Remove the recommendation for specific CA organizations and to
- mention the ability to load the OS certificates.
+- Issue #23326: Removed __ne__ implementations. Since fixing default __ne__
+ implementation in issue #21408 they are redundant.
-- Issue #20765: Add missing documentation for PurePath.with_name() and
- PurePath.with_suffix().
+- Issue #23363: Fix possible overflow in itertools.permutations.
-- Issue #19407: New package installation and distribution guides based on
- the Python Packaging Authority tools. Existing guides have been retained
- as legacy links from the distutils docs, as they still contain some
- required reference material for tool developers that isn't recorded
- anywhere else.
+- Issue #23364: Fix possible overflow in itertools.product.
-- Issue #19697: Document cases where __main__.__spec__ is None.
+- Issue #23366: Fixed possible integer overflow in itertools.combinations.
-Tests
------
+- Issue #23369: Fixed possible integer overflow in
+ _json.encode_basestring_ascii.
-- Issue #18604: Consolidated checks for GUI availability. All platforms now
- at least check whether Tk can be instantiated when the GUI resource is
- requested.
+- Issue #23353: Fix the exception handling of generators in
+ PyEval_EvalFrameEx(). At entry, save or swap the exception state even if
+ PyEval_EvalFrameEx() is called with throwflag=0. At exit, the exception state
+ is now always restored or swapped, not only if why is WHY_YIELD or
+ WHY_RETURN. Patch co-written with Antoine Pitrou.
-- Issue #21275: Fix a socket test on KFreeBSD.
+- Issue #14099: Restored support of writing ZIP files to tellable but
+ non-seekable streams.
-- Issue #21223: Pass test_site/test_startup_imports when some of the extensions
- are built as builtins.
+- Issue #14099: Writing to ZipFile and reading multiple ZipExtFiles is
+ threadsafe now.
-- Issue #20635: Added tests for Tk geometry managers.
+- Issue #19361: JSON decoder now raises JSONDecodeError instead of ValueError.
-- Add test case for freeze.
+- Issue #18518: timeit now rejects statements which can't be compiled outside
+ a function or a loop (e.g. "return" or "break").
-- Issue #20743: Fix a reference leak in test_tcl.
+- Issue #23094: Fixed readline with frames in Python implementation of pickle.
-- Issue #21097: Move test_namespace_pkgs into test_importlib.
+- Issue #23268: Fixed bugs in the comparison of ipaddress classes.
-- Issue #20939: Avoid various network test failures due to new
- redirect of http://www.python.org/ to https://www.python.org:
- use http://www.example.com instead.
+- Issue #21408: Removed incorrect implementations of __ne__() which didn't
+ returned NotImplemented if __eq__() returned NotImplemented. The default
+ __ne__() now works correctly.
-- Issue #20668: asyncio tests no longer rely on tests.txt file.
- (Patch by Vajrasky Kok)
+- Issue #19996: :class:`email.feedparser.FeedParser` now handles (malformed)
+ headers with no key rather than assuming the body has started.
-- Issue #21093: Prevent failures of ctypes test_macholib on OS X if a
- copy of libz exists in $HOME/lib or /usr/local/lib.
+- Issue #20188: Support Application-Layer Protocol Negotiation (ALPN) in the ssl
+ module.
-Tools/Demos
------------
+- Issue #23133: Pickling of ipaddress objects now produces more compact and
+ portable representation.
-- Add support for ``yield from`` to 2to3.
+- Issue #23248: Update ssl error codes from latest OpenSSL git master.
-- Add support for the PEP 465 matrix multiplication operator to 2to3.
+- Issue #23266: Much faster implementation of ipaddress.collapse_addresses()
+ when there are many non-consecutive addresses.
-- Issue #16047: Fix module exception list and __file__ handling in freeze.
- Patch by Meador Inge.
+- Issue #23098: 64-bit dev_t is now supported in the os module.
-- Issue #11824: Consider ABI tags in freeze. Patch by Meador Inge.
+- Issue #21817: When an exception is raised in a task submitted to a
+ ProcessPoolExecutor, the remote traceback is now displayed in the
+ parent process. Patch by Claudiu Popa.
-- Issue #20535: PYTHONWARNING no longer affects the run_tests.py script.
- Patch by Arfrever Frehtes Taifersar Arahesis.
+- Issue #15955: Add an option to limit output size when decompressing LZMA
+ data. Patch by Nikolaus Rath and Martin Panter.
+- Issue #23250: In the http.cookies module, capitalize "HttpOnly" and "Secure"
+ as they are written in the standard.
-What's New in Python 3.4.0?
-===========================
+- Issue #23063: In the disutils' check command, fix parsing of reST with code or
+ code-block directives.
-Release date: 2014-03-16
+- Issue #23209, #23225: selectors.BaseSelector.get_key() now raises a
+ RuntimeError if the selector is closed. And selectors.BaseSelector.close()
+ now clears its internal reference to the selector mapping to break a
+ reference cycle. Initial patch written by Martin Richard.
-Library
--------
+- Issue #17911: Provide a way to seed the linecache for a PEP-302 module
+ without actually loading the code.
-- Issue #20939: Fix test_geturl failure in test_urllibnet due to
- new redirect of http://www.python.org/ to https://www.python.org.
+- Issue #17911: Provide a new object API for traceback, including the ability
+ to not lookup lines at all until the traceback is actually rendered, without
+ any trace of the original objects being kept alive.
-Documentation
--------------
+- Issue #19777: Provide a home() classmethod on Path objects. Contributed
+ by Victor Salgado and Mayank Tripathi.
-- Merge in all documentation changes since branching 3.4.0rc1.
+- Issue #23206: Make ``json.dumps(..., ensure_ascii=False)`` as fast as the
+ default case of ``ensure_ascii=True``. Patch by Naoki Inada.
+- Issue #23185: Add math.inf and math.nan constants.
-What's New in Python 3.4.0 release candidate 3?
-===============================================
+- Issue #23186: Add ssl.SSLObject.shared_ciphers() and
+ ssl.SSLSocket.shared_ciphers() to fetch the client's list ciphers sent at
+ handshake.
-Release date: 2014-03-09
+- Issue #23143: Remove compatibility with OpenSSLs older than 0.9.8.
-Core and Builtins
------------------
+- Issue #23132: Improve performance and introspection support of comparison
+ methods created by functool.total_ordering.
-- Issue #20786: Fix signatures for dict.__delitem__ and
- property.__delete__ builtins.
+- Issue #19776: Add a expanduser() method on Path objects.
-Library
--------
+- Issue #23112: Fix SimpleHTTPServer to correctly carry the query string and
+ fragment when it redirects to add a trailing slash.
-- Issue #20839: Don't trigger a DeprecationWarning in the still supported
- pkgutil.get_loader() API when __loader__ isn't set on a module (nor
- when pkgutil.find_loader() is called directly).
+- Issue #21793: Added http.HTTPStatus enums (i.e. HTTPStatus.OK,
+ HTTPStatus.NOT_FOUND). Patch by Demian Brecht.
-Build
------
+- Issue #23093: In the io, module allow more operations to work on detached
+ streams.
-- Issue #14512: Launch pydoc -b instead of pydocgui.pyw on Windows.
+- Issue #23111: In the ftplib, make ssl.PROTOCOL_SSLv23 the default protocol
+ version.
-- Issue #20748: Uninstalling pip does not leave behind the pyc of
- the uninstaller anymore.
+- Issue #22585: On OpenBSD 5.6 and newer, os.urandom() now calls getentropy(),
+ instead of reading /dev/urandom, to get pseudo-random bytes.
-- Issue #20568: The Windows installer now installs the unversioned ``pip``
- command in addition to the versioned ``pip3`` and ``pip3.4`` commands.
+- Issue #19104: pprint now produces evaluable output for wrapped strings.
-- Issue #20757: The ensurepip helper for the Windows uninstaller now skips
- uninstalling pip (rather than failing) if the user has updated pip to a
- different version from the one bundled with ensurepip.
+- Issue #23071: Added missing names to codecs.__all__. Patch by Martin Panter.
-- Issue #20465: Update OS X and Windows installer builds to use
- SQLite 3.8.3.1.
+- Issue #22783: Pickling now uses the NEWOBJ opcode instead of the NEWOBJ_EX
+ opcode if possible.
+- Issue #15513: Added a __sizeof__ implementation for pickle classes.
-What's New in Python 3.4.0 release candidate 2?
-===============================================
+- Issue #19858: pickletools.optimize() now aware of the MEMOIZE opcode, can
+ produce more compact result and no longer produces invalid output if input
+ data contains MEMOIZE opcodes together with PUT or BINPUT opcodes.
-Release date: 2014-02-23
+- Issue #22095: Fixed HTTPConnection.set_tunnel with default port. The port
+ value in the host header was set to "None". Patch by Demian Brecht.
-Core and Builtins
------------------
+- Issue #23016: A warning no longer produces an AttributeError when the program
+ is run with pythonw.exe.
-- Issue #20625: Parameter names in __annotations__ were not mangled properly.
- Discovered by Jonas Wielicki, patch by Yury Selivanov.
+- Issue #21775: shutil.copytree(): fix crash when copying to VFAT. An exception
+ handler assumed that that OSError objects always have a 'winerror' attribute.
+ That is not the case, so the exception handler itself raised AttributeError
+ when run on Linux (and, presumably, any other non-Windows OS).
+ Patch by Greg Ward.
-- Issue #20261: In pickle, lookup __getnewargs__ and __getnewargs_ex__ on the
- type of the object.
+- Issue #1218234: Fix inspect.getsource() to load updated source of
+ reloaded module. Initial patch by Berker Peksag.
-- Issue #20619: Give the AST nodes of keyword-only arguments a column and line
- number.
+- Issue #21740: Support wrapped callables in doctest. Patch by Claudiu Popa.
-- Issue #20526: Revert changes of issue #19466 which introduces a regression:
- don't clear anymore the state of Python threads early during the Python
- shutdown.
+- Issue #23009: Make sure selectors.EpollSelecrtor.select() works when no
+ FD is registered.
-Library
--------
+- Issue #22959: In the constructor of http.client.HTTPSConnection, prefer the
+ context's check_hostname attribute over the *check_hostname* parameter.
-- Issue #20710: The pydoc summary line no longer displays the "self" parameter
- for bound methods.
+- Issue #22696: Add function :func:`sys.is_finalizing` to know about
+ interpreter shutdown.
-- Issue #20566: Change asyncio.as_completed() to use a Queue, to
- avoid O(N**2) behavior.
+- Issue #16043: Add a default limit for the amount of data xmlrpclib.gzip_decode
+ will return. This resolves CVE-2013-1753.
-- Issue #20704: Implement new debug API in asyncio. Add new methods
- BaseEventLoop.set_debug() and BaseEventLoop.get_debug().
- Add support for setting 'asyncio.tasks._DEBUG' variable with
- 'PYTHONASYNCIODEBUG' environment variable.
+- Issue #14099: ZipFile.open() no longer reopen the underlying file. Objects
+ returned by ZipFile.open() can now operate independently of the ZipFile even
+ if the ZipFile was created by passing in a file-like object as the first
+ argument to the constructor.
-- asyncio: Refactoring and fixes: BaseEventLoop.sock_connect() raises an
- error if the address is not resolved; use __slots__ in Handle and
- TimerHandle; as_completed() and wait() raise TypeError if the passed
- list of Futures is a single Future; call_soon() and other 'call_*()'
- functions raise TypeError if the passed callback is a coroutine
- function; _ProactorBasePipeTransport uses _FlowControlMixin;
- WriteTransport.set_write_buffer_size() calls _maybe_pause_protocol()
- to consider pausing receiving if the watermark limits have changed;
- fix _check_resolved_address() for IPv6 address; and other minor
- improvements, along with multiple documentation updates.
+- Issue #22966: Fix __pycache__ pyc file name clobber when pyc_compile is
+ asked to compile a source file containing multiple dots in the source file
+ name.
-- Issue #20684: Fix inspect.getfullargspec() to not to follow __wrapped__
- chains. Make its behaviour consistent with bound methods first argument.
- Patch by Nick Coghlan and Yury Selivanov.
+- Issue #21971: Update turtledemo doc and add module to the index.
-- Issue #20681: Add new error handling API in asyncio. New APIs:
- loop.set_exception_handler(), loop.default_exception_handler(), and
- loop.call_exception_handler().
+- Issue #21032. Fixed socket leak if HTTPConnection.getresponse() fails.
+ Original patch by Martin Panter.
-- Issue #20673: Implement support for UNIX Domain Sockets in asyncio.
- New APIs: loop.create_unix_connection(), loop.create_unix_server(),
- streams.open_unix_connection(), and streams.start_unix_server().
+- Issue #22407: Deprecated the use of re.LOCALE flag with str patterns or
+ re.ASCII. It was newer worked.
-- Issue #20616: Add a format() method to tracemalloc.Traceback.
+- Issue #22902: The "ip" command is now used on Linux to determine MAC address
+ in uuid.getnode(). Pach by Bruno Cauet.
-- Issue #19744: the ensurepip installation step now just prints a warning to
- stderr rather than failing outright if SSL/TLS is unavailable. This allows
- local installation of POSIX builds without SSL/TLS support.
+- Issue #22960: Add a context argument to xmlrpclib.ServerProxy constructor.
-- Issue #20594: Avoid name clash with the libc function posix_close.
+- Issue #22389: Add contextlib.redirect_stderr().
-Build
------
+- Issue #21356: Make ssl.RAND_egd() optional to support LibreSSL. The
+ availability of the function is checked during the compilation. Patch written
+ by Bernard Spil.
-- Issue #20641: Run MSI custom actions (pip installation, pyc compilation)
- with the NoImpersonate flag, to support elevated execution (UAC).
+- Issue #22915: SAX parser now supports files opened with file descriptor or
+ bytes path.
-- Issue #20221: Removed conflicting (or circular) hypot definition when
- compiled with VS 2010 or above. Initial patch by Tabrez Mohammed.
+- Issue #22609: Constructors and update methods of mapping classes in the
+ collections module now accept the self keyword argument.
-- Issue #20609: Restored the ability to build 64-bit Windows binaries on
- 32-bit Windows, which was broken by the change in issue #19788.
+- Issue #22940: Add readline.append_history_file.
+- Issue #19676: Added the "namereplace" error handler.
-What's New in Python 3.4.0 release candidate 1?
-===============================================
+- Issue #22788: Add *context* parameter to logging.handlers.HTTPHandler.
-Release date: 2014-02-10
+- Issue #22921: Allow SSLContext to take the *hostname* parameter even if
+ OpenSSL doesn't support SNI.
-Core and Builtins
------------------
+- Issue #22894: TestCase.subTest() would cause the test suite to be stopped
+ when in failfast mode, even in the absence of failures.
-- Issue #19255: The builtins module is restored to initial value before
- cleaning other modules. The sys and builtins modules are cleaned last.
+- Issue #22796: HTTP cookie parsing is now stricter, in order to protect
+ against potential injection attacks.
-- Issue #20588: Make Python-ast.c C89 compliant.
+- Issue #22370: Windows detection in pathlib is now more robust.
-- Issue #20437: Fixed 22 potential bugs when deleting objects references.
+- Issue #22841: Reject coroutines in asyncio add_signal_handler().
+ Patch by Ludovic.Gasc.
-- Issue #20500: Displaying an exception at interpreter shutdown no longer
- risks triggering an assertion failure in PyObject_Str.
+- Issue #19494: Added urllib.request.HTTPBasicPriorAuthHandler. Patch by
+ Matej Cepl.
-- Issue #20538: UTF-7 incremental decoder produced inconsistent string when
- input was truncated in BASE64 section.
+- Issue #22578: Added attributes to the re.error class.
-- Issue #20404: io.TextIOWrapper (and hence the open() builtin) now uses the
- internal codec marking system added for issue #19619 to throw LookupError
- for known non-text encodings at stream construction time. The existing
- output type checks remain in place to deal with unmarked third party
- codecs.
+- Issue #22849: Fix possible double free in the io.TextIOWrapper constructor.
-- Issue #17162: Add PyType_GetSlot.
+- Issue #12728: Different Unicode characters having the same uppercase but
+ different lowercase are now matched in case-insensitive regular expressions.
-- Issue #20162: Fix an alignment issue in the siphash24() hash function which
- caused a crash on PowerPC 64-bit (ppc64).
+- Issue #22821: Fixed fcntl() with integer argument on 64-bit big-endian
+ platforms.
-Library
--------
+- Issue #21650: Add an `--sort-keys` option to json.tool CLI.
-- Issue #20530: The signatures for slot builtins have been updated
- to reflect the fact that they only accept positional-only arguments.
+- Issue #22824: Updated reprlib output format for sets to use set literals.
+ Patch contributed by Berker Peksag.
-- Issue #20517: Functions in the os module that accept two filenames
- now register both filenames in the exception on failure.
+- Issue #22824: Updated reprlib output format for arrays to display empty
+ arrays without an unnecessary empty list. Suggested by Serhiy Storchaka.
-- Issue #20563: The ipaddress module API is now considered stable.
+- Issue #22406: Fixed the uu_codec codec incorrectly ported to 3.x.
+ Based on patch by Martin Panter.
-- Issue #14983: email.generator now always adds a line end after each MIME
- boundary marker, instead of doing so only when there is an epilogue. This
- fixes an RFC compliance bug and solves an issue with signed MIME parts.
+- Issue #17293: uuid.getnode() now determines MAC address on AIX using netstat.
+ Based on patch by Aivars Kalvāns.
-- Issue #20540: Fix a performance regression (vs. Python 3.2) when layering
- a multiprocessing Connection over a TCP socket. For small payloads, Nagle's
- algorithm would introduce idle delays before the entire transmission of a
- message.
+- Issue #22769: Fixed ttk.Treeview.tag_has() when called without arguments.
-- Issue #16983: the new email header parsing code will now decode encoded words
- that are (incorrectly) surrounded by quotes, and register a defect.
+- Issue #22417: Verify certificates by default in httplib (PEP 476).
-- Issue #19772: email.generator no longer mutates the message object when
- doing a down-transform from 8bit to 7bit CTEs.
+- Issue #22775: Fixed unpickling of http.cookies.SimpleCookie with protocol 2
+ and above. Patch by Tim Graham.
-- Issue #20536: the statistics module now correctly handle Decimal instances
- with positive exponents
+- Issue #22776: Brought excluded code into the scope of a try block in
+ SysLogHandler.emit().
-- Issue #18805: the netmask/hostmask parsing in ipaddress now more reliably
- filters out illegal values and correctly allows any valid prefix length.
+- Issue #22665: Add missing get_terminal_size and SameFileError to
+ shutil.__all__.
-- Issue #20481: For at least Python 3.4, the statistics module will require
- that all inputs for a single operation be of a single consistent type, or
- else a mixed of ints and a single other consistent type. This avoids
- some interoperability issues that arose with the previous approach of
- coercing to a suitable common type.
+- Issue #6623: Remove deprecated Netrc class in the ftplib module. Patch by
+ Matt Chaput.
-- Issue #20478: the statistics module now treats collections.Counter inputs
- like any other iterable.
+- Issue #17381: Fixed handling of case-insensitive ranges in regular
+ expressions.
-- Issue #17369: get_filename was raising an exception if the filename
- parameter's RFC2231 encoding was broken in certain ways. This was
- a regression relative to python2.
+- Issue #22410: Module level functions in the re module now cache compiled
+ locale-dependent regular expressions taking into account the locale.
-- Issue #20013: Some imap servers disconnect if the current mailbox is
- deleted, and imaplib did not handle that case gracefully. Now it
- handles the 'bye' correctly.
+- Issue #22759: Query methods on pathlib.Path() (exists(), is_dir(), etc.)
+ now return False when the underlying stat call raises NotADirectoryError.
-- Issue #20531: Revert 3.4 version of fix for #19063, and apply the 3.3
- version. That is, do *not* raise an error if unicode is passed to
- email.message.Message.set_payload.
+- Issue #8876: distutils now falls back to copying files when hard linking
+ doesn't work. This allows use with special filesystems such as VirtualBox
+ shared folders.
-- Issue #20476: If a non-compat32 policy is used with any of the email parsers,
- EmailMessage is now used as the factory class. The factory class should
- really come from the policy; that will get fixed in 3.5.
+- Issue #22217: Implemented reprs of classes in the zipfile module.
-- Issue #19920: TarFile.list() no longer fails when outputs a listing
- containing non-encodable characters. Based on patch by Vajrasky Kok.
+- Issue #22457: Honour load_tests in the start_dir of discovery.
-- Issue #20515: Fix NULL pointer dereference introduced by issue #20368.
+- Issue #18216: gettext now raises an error when a .mo file has an
+ unsupported major version number. Patch by Aaron Hill.
-- Issue #19186: Restore namespacing of expat symbols inside the pyexpat module.
+- Issue #13918: Provide a locale.delocalize() function which can remove
+ locale-specific number formatting from a string representing a number,
+ without then converting it to a specific type. Patch by Cédric Krier.
-- Issue #20053: ensurepip (and hence venv) are no longer affected by the
- settings in the default pip configuration file.
+- Issue #22676: Make the pickling of global objects which don't have a
+ __module__ attribute less slow.
-- Issue #20426: When passing the re.DEBUG flag, re.compile() displays the
- debug output every time it is called, regardless of the compilation cache.
+- Issue #18853: Fixed ResourceWarning in shlex.__nain__.
-- Issue #20368: The null character now correctly passed from Tcl to Python.
- Improved error handling in variables-related commands.
+- Issue #9351: Defaults set with set_defaults on an argparse subparser
+ are no longer ignored when also set on the parent parser.
-- Issue #20435: Fix _pyio.StringIO.getvalue() to take into account newline
- translation settings.
+- Issue #7559: unittest test loading ImportErrors are reported as import errors
+ with their import exception rather than as attribute errors after the import
+ has already failed.
-- tracemalloc: Fix slicing traces and fix slicing a traceback.
+- Issue #19746: Make it possible to examine the errors from unittest
+ discovery without executing the test suite. The new `errors` attribute
+ on TestLoader exposes these non-fatal errors encountered during discovery.
-- Issue #20354: Fix an alignment issue in the tracemalloc module on 64-bit
- platforms. Bug seen on 64-bit Linux when using "make profile-opt".
+- Issue #21991: Make email.headerregistry's header 'params' attributes
+ be read-only (MappingProxyType). Previously the dictionary was modifiable
+ but a new one was created on each access of the attribute.
-- Issue #17159: inspect.signature now accepts duck types of functions,
- which adds support for Cython functions. Initial patch by Stefan Behnel.
+- Issue #22638: SSLv3 is now disabled throughout the standard library.
+ It can still be enabled by instantiating a SSLContext manually.
-- Issue #18801: Fix inspect.classify_class_attrs to correctly classify
- object.__new__ and object.__init__.
+- Issue #22641: In asyncio, the default SSL context for client connections
+ is now created using ssl.create_default_context(), for stronger security.
-- Fixed cmath.isinf's name in its argument parsing code.
+- Issue #17401: Include closefd in io.FileIO repr.
-- Issue #20311, #20452: poll and epoll now round the timeout away from zero,
- instead of rounding towards zero, in select and selectors modules:
- select.epoll.poll(), selectors.PollSelector.poll() and
- selectors.EpollSelector.poll(). For example, a timeout of one microsecond
- (1e-6) is now rounded to one millisecondi (1e-3), instead of being rounded to
- zero. However, the granularity property and asyncio's resolution feature
- were removed again.
+- Issue #21338: Add silent mode for compileall. quiet parameters of
+ compile_{dir, file, path} functions now have a multilevel value. Also,
+ -q option of the CLI now have a multilevel value. Patch by Thomas Kluyver.
-- asyncio: Some refactoring; various fixes; add write flow control to
- unix pipes; Future.set_exception() instantiates the exception
- argument if it is a class; improved proactor pipe transport; support
- wait_for(f, None); don't log broken/disconnected pipes; use
- ValueError instead of assert for forbidden subprocess_{shell,exec}
- arguments; added a convenience API for subprocess management; added
- StreamReader.at_eof(); properly handle duplicate coroutines/futures
- in gather(), wait(), as_completed(); use a bytearray for buffering
- in StreamReader; and more.
+- Issue #20152: Convert the array and cmath modules to Argument Clinic.
-- Issue #20288: fix handling of invalid numeric charrefs in HTMLParser.
+- Issue #18643: Add socket.socketpair() on Windows.
-- Issue #20424: Python implementation of io.StringIO now supports lone surrogates.
+- Issue #22435: Fix a file descriptor leak when SocketServer bind fails.
-- Issue #20308: inspect.signature now works on classes without user-defined
- __init__ or __new__ methods.
+- Issue #13096: Fixed segfault in CTypes POINTER handling of large
+ values.
-- Issue #20372: inspect.getfile (and a bunch of other inspect functions that
- use it) doesn't crash with unexpected AttributeError on classes defined in C
- without __module__.
+- Issue #11694: Raise ConversionError in xdrlib as documented. Patch
+ by Filip Gruszczyński and Claudiu Popa.
-- Issue #20356: inspect.signature formatting uses '/' to separate
- positional-only parameters from others.
+- Issue #19380: Optimized parsing of regular expressions.
-- Issue #20223: inspect.signature now supports methods defined with
- functools.partialmethods.
+- Issue #1519638: Now unmatched groups are replaced with empty strings in re.sub()
+ and re.subn().
-- Issue #19456: ntpath.join() now joins relative paths correctly when a drive
- is present.
+- Issue #18615: sndhdr.what/whathdr now return a namedtuple.
-- Issue #19077: tempfile.TemporaryDirectory cleanup no longer fails when
- called during shutdown. Emitting resource warning in __del__ no longer fails.
- Original patch by Antoine Pitrou.
+- Issue #22462: Fix pyexpat's creation of a dummy frame to make it
+ appear in exception tracebacks.
-- Issue #20394: Silence Coverity warning in audioop module.
+- Issue #21965: Add support for in-memory SSL to the ssl module. Patch
+ by Geert Jansen.
-- Issue #20367: Fix behavior of concurrent.futures.as_completed() for
- duplicate arguments. Patch by Glenn Langford.
+- Issue #21173: Fix len() on a WeakKeyDictionary when .clear() was called
+ with an iterator alive.
-- Issue #8260: The read(), readline() and readlines() methods of
- codecs.StreamReader returned incomplete data when were called after
- readline() or read(size). Based on patch by Amaury Forgeot d'Arc.
+- Issue #11866: Eliminated race condition in the computation of names
+ for new threads.
-- Issue #20105: the codec exception chaining now correctly sets the
- traceback of the original exception as its __traceback__ attribute.
+- Issue #21905: Avoid RuntimeError in pickle.whichmodule() when sys.modules
+ is mutated while iterating. Patch by Olivier Grisel.
-- Issue #17481: inspect.getfullargspec() now uses inspect.signature() API.
+- Issue #11271: concurrent.futures.Executor.map() now takes a *chunksize*
+ argument to allow batching of tasks in child processes and improve
+ performance of ProcessPoolExecutor. Patch by Dan O'Reilly.
-- Issue #15304: concurrent.futures.wait() can block forever even if
- Futures have completed. Patch by Glenn Langford.
+- Issue #21883: os.path.join() and os.path.relpath() now raise a TypeError with
+ more helpful error message for unsupported or mismatched types of arguments.
-- Issue #14455: plistlib: fix serializing integers in the range
- of an unsigned long long but outside of the range of signed long long for
- binary plist files.
+- Issue #22219: The zipfile module CLI now adds entries for directories
+ (including empty directories) in ZIP file.
-IDLE
-----
+- Issue #22449: In the ssl.SSLContext.load_default_certs, consult the
+ environmental variables SSL_CERT_DIR and SSL_CERT_FILE on Windows.
-- Issue #20406: Use Python application icons for Idle window title bars.
- Patch mostly by Serhiy Storchaka.
+- Issue #22508: The email.__version__ variable has been removed; the email
+ code is no longer shipped separately from the stdlib, and __version__
+ hasn't been updated in several releases.
-- Update the python.gif icon for the Idle classbrowser and pathbowser
- from the old green snake to the new blue and yellow snakes.
+- Issue #20076: Added non derived UTF-8 aliases to locale aliases table.
-- Issue #17721: Remove non-functional configuration dialog help button until we
- make it actually gives some help when clicked. Patch by Guilherme Simões.
+- Issue #20079: Added locales supported in glibc 2.18 to locale alias table.
-Tests
------
+- Issue #20218: Added convenience methods read_text/write_text and read_bytes/
+ write_bytes to pathlib.Path objects.
-- Issue #20532: Tests which use _testcapi now are marked as CPython only.
+- Issue #22437: Number of capturing groups in regular expression is no longer
+ limited by 100.
-- Issue #19920: Added tests for TarFile.list(). Based on patch by Vajrasky Kok.
+- Issue #17442: InteractiveInterpreter now displays the full chained traceback
+ in its showtraceback method, to match the built in interactive interpreter.
-- Issue #19990: Added tests for the imghdr module. Based on patch by
- Claudiu Popa.
+- Issue #23392: Added tests for marshal C API that works with FILE*.
-- Issue #20474: Fix test_socket "unexpected success" failures on OS X 10.7+.
-Tools/Demos
------------
+- Issue #10510: distutils register and upload methods now use HTML standards
+ compliant CRLF line endings.
-- Issue #20530: Argument Clinic's signature format has been revised again.
- The new syntax is highly human readable while still preventing false
- positives. The syntax also extends Python syntax to denote "self" and
- positional-only parameters, allowing inspect.Signature objects to be
- totally accurate for all supported builtins in Python 3.4.
+- Issue #9850: Fixed macpath.join() for empty first component. Patch by
+ Oleg Oshmyan.
-- Issue #20456: Argument Clinic now observes the C preprocessor conditional
- compilation statements of the C files it parses. When a Clinic block is
- inside a conditional code, it adjusts its output to match, including
- automatically generating an empty methoddef macro.
+- Issue #5309: distutils' build and build_ext commands now accept a ``-j``
+ option to enable parallel building of extension modules.
-- Issue #20456: Cloned functions in Argument Clinic now use the correct
- name, not the name of the function they were cloned from, for text
- strings inside generated code.
+- Issue #22448: Improve canceled timer handles cleanup to prevent
+ unbound memory usage. Patch by Joshua Moore-Oliva.
-- Issue #20456: Fixed Argument Clinic's test suite and "--converters" feature.
+- Issue #22427: TemporaryDirectory no longer attempts to clean up twice when
+ used in the with statement in generator.
-- Issue #20456: Argument Clinic now allows specifying different names
- for a parameter in Python and C, using "as" on the parameter line.
+- Issue #22362: Forbidden ambiguous octal escapes out of range 0-0o377 in
+ regular expressions.
-- Issue #20326: Argument Clinic now uses a simple, unique signature to
- annotate text signatures in docstrings, resulting in fewer false
- positives. "self" parameters are also explicitly marked, allowing
- inspect.Signature() to authoritatively detect (and skip) said parameters.
+- Issue #20912: Now directories added to ZIP file have correct Unix and MS-DOS
+ directory attributes.
-- Issue #20326: Argument Clinic now generates separate checksums for the
- input and output sections of the block, allowing external tools to verify
- that the input has not changed (and thus the output is not out-of-date).
+- Issue #21866: ZipFile.close() no longer writes ZIP64 central directory
+ records if allowZip64 is false.
-Build
------
+- Issue #22278: Fix urljoin problem with relative urls, a regression observed
+ after changes to issue22118 were submitted.
-- Issue #20465: Update SQLite shipped with OS X installer to 3.8.3.
+- Issue #22415: Fixed debugging output of the GROUPREF_EXISTS opcode in the re
+ module. Removed trailing spaces in debugging output.
-C-API
------
+- Issue #22423: Unhandled exception in thread no longer causes unhandled
+ AttributeError when sys.stderr is None.
-- Issue #20517: Added new functions allowing OSError exceptions to reference
- two filenames instead of one: PyErr_SetFromErrnoWithFilenameObjects() and
- PyErr_SetExcFromWindowsErrWithFilenameObjects().
+- Issue #21332: Ensure that ``bufsize=1`` in subprocess.Popen() selects
+ line buffering, rather than block buffering. Patch by Akira Li.
-Documentation
--------------
+- Issue #21091: Fix API bug: email.message.EmailMessage.is_attachment is now
+ a method.
-- Issue #20488: Change wording to say importlib is *the* implementation of
- import instead of just *an* implementation.
+- Issue #21079: Fix email.message.EmailMessage.is_attachment to return the
+ correct result when the header has parameters as well as a value.
-- Issue #6386: Clarify in the tutorial that specifying a symlink to execute
- means the directory containing the executed script and not the symlink is
- added to sys.path.
+- Issue #22247: Add NNTPError to nntplib.__all__.
+- Issue #22366: urllib.request.urlopen will accept a context object
+ (SSLContext) as an argument which will then used be for HTTPS connection.
+ Patch by Alex Gaynor.
-What's New in Python 3.4.0 Beta 3?
-==================================
+- Issue #4180: The warnings registries are now reset when the filters
+ are modified.
-Release date: 2014-01-26
+- Issue #22419: Limit the length of incoming HTTP request in wsgiref server to
+ 65536 bytes and send a 414 error code for higher lengths. Patch contributed
+ by Devin Cook.
-Core and Builtins
------------------
+- Lax cookie parsing in http.cookies could be a security issue when combined
+ with non-standard cookie handling in some Web browsers. Reported by
+ Sergey Bobrov.
-- Issue #20189: Four additional builtin types (PyTypeObject,
- PyMethodDescr_Type, _PyMethodWrapper_Type, and PyWrapperDescr_Type)
- have been modified to provide introspection information for builtins.
+- Issue #20537: logging methods now accept an exception instance as well as a
+ Boolean value or exception tuple. Thanks to Yury Selivanov for the patch.
-- Issue #17825: Cursor "^" is correctly positioned for SyntaxError and
- IndentationError.
+- Issue #22384: An exception in Tkinter callback no longer crashes the program
+ when it is run with pythonw.exe.
-- Issue #2382: SyntaxError cursor "^" is now written at correct position in most
- cases when multibyte characters are in line (before "^"). This still not
- works correctly with wide East Asian characters.
+- Issue #22168: Prevent turtle AttributeError with non-default Canvas on OS X.
-- Issue #18960: The first line of Python script could be executed twice when
- the source encoding was specified on the second line. Now the source encoding
- declaration on the second line isn't effective if the first line contains
- anything except a comment. 'python -x' works now again with files with the
- source encoding declarations, and can be used to make Python batch files
- on Windows.
+- Issue #21147: sqlite3 now raises an exception if the request contains a null
+ character instead of truncate it. Based on patch by Victor Stinner.
-Library
--------
+- Issue #13968: The glob module now supports recursive search in
+ subdirectories using the "**" pattern.
-- asyncio: Various improvements and small changes not all covered by
- issues listed below. E.g. wait_for() now cancels the inner task if
- the timeout occcurs; tweaked the set of exported symbols; renamed
- Empty/Full to QueueEmpty/QueueFull; "with (yield from lock)" now
- uses a separate context manager; readexactly() raises if not enough
- data was read; PTY support tweaks.
+- Issue #21951: Fixed a crash in Tkinter on AIX when called Tcl command with
+ empty string or tuple argument.
-- Issue #20311: asyncio: Add a granularity attribute to BaseEventLoop: maximum
- between the resolution of the BaseEventLoop.time() method and the resolution
- of the selector. The granuarility is used in the scheduler to round time and
- deadline.
+- Issue #21951: Tkinter now most likely raises MemoryError instead of crash
+ if the memory allocation fails.
-- Issue #20311: selectors: Add a resolution attribute to BaseSelector.
+- Issue #22338: Fix a crash in the json module on memory allocation failure.
-- Issue #20189: unittest.mock now no longer assumes that any object for
- which it could get an inspect.Signature is a callable written in Python.
- Fix courtesy of Michael Foord.
+- Issue #12410: imaplib.IMAP4 now supports the context management protocol.
+ Original patch by Tarek Ziadé.
-- Issue #20317: ExitStack.__exit__ could create a self-referential loop if an
- exception raised by a cleanup operation already had its context set
- correctly (for example, by the @contextmanager decorator). The infinite
- loop this caused is now avoided by checking if the expected context is
- already set before trying to fix it.
+- Issue #21270: We now override tuple methods in mock.call objects so that
+ they can be used as normal call attributes.
-- Issue #20374: Fix build with GNU readline >= 6.3.
+- Issue #16662: load_tests() is now unconditionally run when it is present in
+ a package's __init__.py. TestLoader.loadTestsFromModule() still accepts
+ use_load_tests, but it is deprecated and ignored. A new keyword-only
+ attribute `pattern` is added and documented. Patch given by Robert Collins,
+ tweaked by Barry Warsaw.
-- Issue #20262: Warnings are raised now when duplicate names are added in the
- ZIP file or too long ZIP file comment is truncated.
+- Issue #22226: First letter no longer is stripped from the "status" key in
+ the result of Treeview.heading().
-- Issue #20165: The unittest module no longer considers tests marked with
- @expectedFailure successful if they pass.
+- Issue #19524: Fixed resource leak in the HTTP connection when an invalid
+ response is received. Patch by Martin Panter.
-- Issue #18574: Added missing newline in 100-Continue reply from
- http.server.BaseHTTPRequestHandler. Patch by Nikolaus Rath.
+- Issue #20421: Add a .version() method to SSL sockets exposing the actual
+ protocol version in use.
-- Issue #20270: urllib.urlparse now supports empty ports.
+- Issue #19546: configparser exceptions no longer expose implementation details.
+ Chained KeyErrors are removed, which leads to cleaner tracebacks. Patch by
+ Claudiu Popa.
-- Issue #20243: TarFile no longer raise ReadError when opened in write mode.
+- Issue #22051: turtledemo no longer reloads examples to re-run them.
+ Initialization of variables and gui setup should be done in main(),
+ which is called each time a demo is run, but not on import.
-- Issue #20238: TarFile opened with external fileobj and "w:gz" mode didn't
- write complete output on close.
+- Issue #21933: Turtledemo users can change the code font size with a menu
+ selection or control(command) '-' or '+' or control-mousewheel.
+ Original patch by Lita Cho.
-- Issue #20245: The open functions in the tarfile module now correctly handle
- empty mode.
+- Issue #21597: The separator between the turtledemo text pane and the drawing
+ canvas can now be grabbed and dragged with a mouse. The code text pane can
+ be widened to easily view or copy the full width of the text. The canvas
+ can be widened on small screens. Original patches by Jan Kanis and Lita Cho.
-- Issue #20242: Fixed basicConfig() format strings for the alternative
- formatting styles. Thanks to kespindler for the bug report and patch.
+- Issue #18132: Turtledemo buttons no longer disappear when the window is
+ shrunk. Original patches by Jan Kanis and Lita Cho.
-- Issue #20246: Fix buffer overflow in socket.recvfrom_into.
+- Issue #22043: time.monotonic() is now always available.
+ ``threading.Lock.acquire()``, ``threading.RLock.acquire()`` and socket
+ operations now use a monotonic clock, instead of the system clock, when a
+ timeout is used.
-- Issues #20206 and #5803: Fix edge case in email.quoprimime.encode where it
- truncated lines ending in a character needing encoding but no newline by
- using a more efficient algorithm that doesn't have the bug.
+- Issue #21527: Add a default number of workers to ThreadPoolExecutor equal
+ to 5 times the number of CPUs. Patch by Claudiu Popa.
-- Issue #19082: Working xmlrpc.server and xmlrpc.client examples. Both in
- modules and in documentation. Initial patch contributed by Vajrasky Kok.
+- Issue #22216: smtplib now resets its state more completely after a quit. The
+ most obvious consequence of the previous behavior was a STARTTLS failure
+ during a connect/starttls/quit/connect/starttls sequence.
-- Issue #20138: The wsgiref.application_uri() and wsgiref.request_uri()
- functions now conform to PEP 3333 when handle non-ASCII URLs.
+- Issue #22098: ctypes' BigEndianStructure and LittleEndianStructure now
+ define an empty __slots__ so that subclasses don't always get an instance
+ dict. Patch by Claudiu Popa.
-- Issue #19097: Raise the correct Exception when cgi.FieldStorage is given an
- invalid fileobj.
+- Issue #22185: Fix an occasional RuntimeError in threading.Condition.wait()
+ caused by mutation of the waiters queue without holding the lock. Patch
+ by Doug Zongker.
-- Issue #20152: Ported Python/import.c over to Argument Clinic.
+- Issue #22287: On UNIX, _PyTime_gettimeofday() now uses
+ clock_gettime(CLOCK_REALTIME) if available. As a side effect, Python now
+ depends on the librt library on Solaris and on Linux (only with glibc older
+ than 2.17).
-- Issue #13107: argparse and optparse no longer raises an exception when output
- a help on environment with too small COLUMNS. Based on patch by
- Elazar Gershuni.
+- Issue #22182: Use e.args to unpack exceptions correctly in
+ distutils.file_util.move_file. Patch by Claudiu Popa.
-- Issue #20207: Always disable SSLv2 except when PROTOCOL_SSLv2 is explicitly
- asked for.
+- The webbrowser module now uses subprocess's start_new_session=True rather
+ than a potentially risky preexec_fn=os.setsid call.
-- Issue #18960: The tokenize module now ignore the source encoding declaration
- on the second line if the first line contains anything except a comment.
+- Issue #22042: signal.set_wakeup_fd(fd) now raises an exception if the file
+ descriptor is in blocking mode.
-- Issue #20078: Reading malformed zipfiles no longer hangs with 100% CPU
- consumption.
+- Issue #16808: inspect.stack() now returns a named tuple instead of a tuple.
+ Patch by Daniel Shahaf.
-- Issue #20113: os.readv() and os.writev() now raise an OSError exception on
- error instead of returning -1.
+- Issue #22236: Fixed Tkinter images copying operations in NoDefaultRoot mode.
-- Issue #19719: Make importlib.abc.MetaPathFinder.find_module(),
- PathEntryFinder.find_loader(), and Loader.load_module() use PEP 451 APIs to
- help with backwards-compatibility.
+- Issue #2527: Add a *globals* argument to timeit functions, in order to
+ override the globals namespace in which the timed code is executed.
+ Patch by Ben Roberts.
-- Issue #20144: inspect.Signature now supports parsing simple symbolic
- constants as parameter default values in __text_signature__.
+- Issue #22118: Switch urllib.parse to use RFC 3986 semantics for the
+ resolution of relative URLs, rather than RFCs 1808 and 2396.
+ Patch by Demian Brecht.
-- Issue #20072: Fixed multiple errors in tkinter with wantobjects is False.
+- Issue #21549: Added the "members" parameter to TarFile.list().
-- Issue #20229: Avoid plistlib deprecation warning in platform.mac_ver().
+- Issue #19628: Allow compileall recursion depth to be specified with a -r
+ option.
-- Issue #14455: Fix some problems with the new binary plist support in plistlib.
+- Issue #15696: Add a __sizeof__ implementation for mmap objects on Windows.
-IDLE
-----
+- Issue #22068: Avoided reference loops with Variables and Fonts in Tkinter.
-- Issue #17390: Add Python version to Idle editor window title bar.
- Original patches by Edmond Burnett and Kent Johnson.
+- Issue #22165: SimpleHTTPRequestHandler now supports undecodable file names.
-- Issue #18960: IDLE now ignores the source encoding declaration on the second
- line if the first line contains anything except a comment.
+- Issue #15381: Optimized line reading in io.BytesIO.
-Tests
------
+- Issue #8797: Raise HTTPError on failed Basic Authentication immediately.
+ Initial patch by Sam Bull.
-- Issue #20358: Tests for curses.window.overlay and curses.window.overwrite
- no longer specify min{row,col} > max{row,col}.
+- Issue #20729: Restored the use of lazy iterkeys()/itervalues()/iteritems()
+ in the mailbox module.
-- Issue #19804: The test_find_mac test in test_uuid is now skipped if the
- ifconfig executable is not available.
+- Issue #21448: Changed FeedParser feed() to avoid O(N**2) behavior when
+ parsing long line. Original patch by Raymond Hettinger.
-- Issue #19886: Use better estimated memory requirements for bigmem tests.
+- Issue #22184: The functools LRU Cache decorator factory now gives an earlier
+ and clearer error message when the user forgets the required parameters.
-Tools/Demos
------------
+- Issue #17923: glob() patterns ending with a slash no longer match non-dirs on
+ AIX. Based on patch by Delhallt.
-- Issue #20390: Argument Clinic's "file" output preset now defaults to
- "{dirname}/clinic/{basename}.h".
+- Issue #21725: Added support for RFC 6531 (SMTPUTF8) in smtpd.
-- Issue #20390: Argument Clinic's "class" directive syntax has been extended
- with two new required arguments: "typedef" and "type_object".
+- Issue #22176: Update the ctypes module's libffi to v3.1. This release
+ adds support for the Linux AArch64 and POWERPC ELF ABIv2 little endian
+ architectures.
-- Issue #20390: Argument Clinic: If __new__ or __init__ functions didn't use
- kwargs (or args), the PyArg_NoKeywords (or PyArg_NoPositional) calls
- generated are only run when the type object is an exact match.
+- Issue #5411: Added support for the "xztar" format in the shutil module.
-- Issue #20390: Argument Clinic now fails if you have required parameters after
- optional parameters.
+- Issue #21121: Don't force 3rd party C extensions to be built with
+ -Werror=declaration-after-statement.
-- Issue #20390: Argument Clinic converters now have a new template they can
- inject code into: "modifiers". Code put there is run in the parsing
- function after argument parsing but before the call to the impl.
+- Issue #21975: Fixed crash when using uninitialized sqlite3.Row (in particular
+ when unpickling pickled sqlite3.Row). sqlite3.Row is now initialized in the
+ __new__() method.
-- Issue #20376: Argument Clinic now escapes backslashes in docstrings.
+- Issue #20170: Convert posixmodule to use Argument Clinic.
-- Issue #20381: Argument Clinic now sanity checks the default argument when
- c_default is also specified, providing a nice failure message for
- disallowed values.
+- Issue #21539: Add a *exists_ok* argument to `Pathlib.mkdir()` to mimic
+ `mkdir -p` and `os.makedirs()` functionality. When true, ignore
+ FileExistsErrors. Patch by Berker Peksag.
-- Issue #20189: Argument Clinic now ensures that parser functions for
- __new__ are always of type newfunc, the type of the tp_new slot.
- Similarly, parser functions for __init__ are now always of type initproc,
- the type of tp_init.
+- Issue #22127: Bypass IDNA for pure-ASCII host names in the socket module
+ (in particular for numeric IPs).
-- Issue #20189: Argument Clinic now suppresses the docstring for __new__
- and __init__ functions if no docstring is provided in the input.
+- Issue #21047: set the default value for the *convert_charrefs* argument
+ of HTMLParser to True. Patch by Berker Peksag.
-- Issue #20189: Argument Clinic now suppresses the "self" parameter in the
- impl for @staticmethod functions.
+- Add an __all__ to html.entities.
-- Issue #20294: Argument Clinic now supports argument parsing for __new__ and
- __init__ functions.
+- Issue #15114: the strict mode and argument of HTMLParser, HTMLParser.error,
+ and the HTMLParserError exception have been removed.
-- Issue #20299: Argument Clinic custom converters may now change the default
- value of c_default and py_default with a class member.
+- Issue #22085: Dropped support of Tk 8.3 in Tkinter.
-- Issue #20287: Argument Clinic's output is now configurable, allowing
- delaying its output or even redirecting it to a separate file.
+- Issue #21580: Now Tkinter correctly handles bytes arguments passed to Tk.
+ In particular this allows to initialize images from binary data.
-- Issue #20226: Argument Clinic now permits simple expressions
- (e.g. "sys.maxsize - 1") as default values for parameters.
+- Issue #22003: When initialized from a bytes object, io.BytesIO() now
+ defers making a copy until it is mutated, improving performance and
+ memory use on some use cases. Patch by David Wilson.
-- Issue #19936: Added executable bits or shebang lines to Python scripts which
- requires them. Disable executable bits and shebang lines in test and
- benchmark files in order to prevent using a random system python, and in
- source files of modules which don't provide command line interface. Fixed
- shebang lines in the unittestgui and checkpip scripts.
+- Issue #22018: On Windows, signal.set_wakeup_fd() now also supports sockets.
+ A side effect is that Python depends to the WinSock library.
-- Issue #20268: Argument Clinic now supports cloning the parameters and
- return converter of existing functions.
+- Issue #22054: Add os.get_blocking() and os.set_blocking() functions to get
+ and set the blocking mode of a file descriptor (False if the O_NONBLOCK flag
+ is set, True otherwise). These functions are not available on Windows.
-- Issue #20228: Argument Clinic now has special support for class special
- methods.
+- Issue #17172: Make turtledemo start as active on OS X even when run with
+ subprocess. Patch by Lita Cho.
-- Issue #20214: Fixed a number of small issues and documentation errors in
- Argument Clinic (see issue for details).
+- Issue #21704: Fix build error for _multiprocessing when semaphores
+ are not available. Patch by Arfrever Frehtes Taifersar Arahesis.
-- Issue #20196: Fixed a bug where Argument Clinic did not generate correct
- parsing code for functions with positional-only parameters where all arguments
- are optional.
+- Issue #20173: Convert sha1, sha256, sha512 and md5 to ArgumentClinic.
+ Patch by Vajrasky Kok.
-- Issue #18960: 2to3 and the findnocoding.py script now ignore the source
- encoding declaration on the second line if the first line contains anything
- except a comment.
+- Fix repr(_socket.socket) on Windows 64-bit: don't fail with OverflowError
+ on closed socket. repr(socket.socket) already works fine.
-- Issue #19723: The marker comments Argument Clinic uses have been changed
- to improve readability.
+- Issue #22033: Reprs of most Python implemened classes now contain actual
+ class name instead of hardcoded one.
-- Issue #20157: When Argument Clinic renames a parameter because its name
- collides with a C keyword, it no longer exposes that rename to PyArg_Parse.
+- Issue #21947: The dis module can now disassemble generator-iterator
+ objects based on their gi_code attribute. Patch by Clement Rouault.
-- Issue #20141: Improved Argument Clinic's support for the PyArg_Parse "O!"
- format unit.
+- Issue #16133: The asynchat.async_chat.handle_read() method now ignores
+ BlockingIOError exceptions.
-- Issue #20144: Argument Clinic now supports simple symbolic constants
- as parameter default values.
+- Issue #22044: Fixed premature DECREF in call_tzinfo_method.
+ Patch by Tom Flanagan.
-- Issue #20143: The line numbers reported in Argument Clinic errors are
- now more accurate.
+- Issue #19884: readline: Disable the meta modifier key if stdout is not
+ a terminal to not write the ANSI sequence "\033[1034h" into stdout. This
+ sequence is used on some terminal (ex: TERM=xterm-256color") to enable
+ support of 8 bit characters.
-- Issue #20142: Py_buffer variables generated by Argument Clinic are now
- initialized with a default value.
+- Issue #4350: Removed a number of out-of-dated and non-working for a long time
+ Tkinter methods.
-Build
------
+- Issue #6167: Scrollbar.activate() now returns the name of active element if
+ the argument is not specified. Scrollbar.set() now always accepts only 2
+ arguments.
-- Issue #12837: Silence a tautological comparison warning on OS X under Clang in
- socketmodule.c.
+- Issue #15275: Clean up and speed up the ntpath module.
+- Issue #21888: plistlib's load() and loads() now work if the fmt parameter is
+ specified.
-What's New in Python 3.4.0 Beta 2?
-==================================
+- Issue #22032: __qualname__ instead of __name__ is now always used to format
+ fully qualified class names of Python implemented classes.
-Release date: 2014-01-05
+- Issue #22031: Reprs now always use hexadecimal format with the "0x" prefix
+ when contain an id in form " at 0x...".
-Core and Builtins
------------------
+- Issue #22018: signal.set_wakeup_fd() now raises an OSError instead of a
+ ValueError on ``fstat()`` failure.
-- Issue #17432: Drop UCS2 from names of Unicode functions in python3.def.
+- Issue #21044: tarfile.open() now handles fileobj with an integer 'name'
+ attribute. Based on patch by Antoine Pietri.
-- Issue #19526: Exclude all new API from the stable ABI. Exceptions can be
- made if a need is demonstrated.
+- Issue #21966: Respect -q command-line option when code module is ran.
-- Issue #19969: PyBytes_FromFormatV() now raises an OverflowError if "%c"
- argument is not in range [0; 255].
+- Issue #19076: Don't pass the redundant 'file' argument to self.error().
-- Issue #19995: %c, %o, %x, and %X now issue a DeprecationWarning on non-integer
- input; reworded docs to clarify that an integer type should define both __int__
- and __index__.
+- Issue #16382: Improve exception message of warnings.warn() for bad
+ category. Initial patch by Phil Elson.
-- Issue #19787: PyThread_set_key_value() now always set the value. In Python
- 3.3, the function did nothing if the key already exists (if the current value
- is a non-NULL pointer).
+- Issue #21932: os.read() now uses a :c:func:`Py_ssize_t` type instead of
+ :c:type:`int` for the size to support reading more than 2 GB at once. On
+ Windows, the size is truncted to INT_MAX. As any call to os.read(), the OS
+ may read less bytes than the number of requested bytes.
-- Issue #14432: Remove the thread state field from the frame structure. Fix a
- crash when a generator is created in a C thread that is destroyed while the
- generator is still used. The issue was that a generator contains a frame, and
- the frame kept a reference to the Python state of the destroyed C thread. The
- crash occurs when a trace function is setup.
+- Issue #21942: Fixed source file viewing in pydoc's server mode on Windows.
-- Issue #19576: PyGILState_Ensure() now initializes threads. At startup, Python
- has no concrete GIL. If PyGILState_Ensure() is called from a new thread for
- the first time and PyEval_InitThreads() was not called yet, a GIL needs to be
- created.
+- Issue #11259: asynchat.async_chat().set_terminator() now raises a ValueError
+ if the number of received bytes is negative.
-- Issue #17576: Deprecation warning emitted now when __int__() or __index__()
- return not int instance.
+- Issue #12523: asynchat.async_chat.push() now raises a TypeError if it doesn't
+ get a bytes string
-- Issue #19932: Fix typo in import.h, missing whitespaces in function prototypes.
+- Issue #21707: Add missing kwonlyargcount argument to
+ ModuleFinder.replace_paths_in_code().
-- Issue #19736: Add module-level statvfs constants defined for GNU/glibc
- based systems.
+- Issue #20639: calling Path.with_suffix('') allows removing the suffix
+ again. Patch by July Tikhonov.
-- Issue #20097: Fix bad use of "self" in importlib's WindowsRegistryFinder.
+- Issue #21714: Disallow the construction of invalid paths using
+ Path.with_name(). Original patch by Antony Lee.
-- Issue #19729: In str.format(), fix recursive expansion in format spec.
+- Issue #15014: Added 'auth' method to smtplib to make implementing auth
+ mechanisms simpler, and used it internally in the login method.
-- Issue #19638: Fix possible crash / undefined behaviour from huge (more than 2
- billion characters) input strings in _Py_dg_strtod.
+- Issue #21151: Fixed a segfault in the winreg module when ``None`` is passed
+ as a ``REG_BINARY`` value to SetValueEx. Patch by John Ehresman.
-Library
--------
+- Issue #21090: io.FileIO.readall() does not ignore I/O errors anymore. Before,
+ it ignored I/O errors if at least the first C call read() succeed.
-- Issue #20154: Deadlock in asyncio.StreamReader.readexactly().
+- Issue #5800: headers parameter of wsgiref.headers.Headers is now optional.
+ Initial patch by Pablo Torres Navarrete and SilentGhost.
-- Issue #16113: Remove sha3 module again.
+- Issue #21781: ssl.RAND_add() now supports strings longer than 2 GB.
-- Issue #20111: pathlib.Path.with_suffix() now sanity checks the given suffix.
+- Issue #21679: Prevent extraneous fstat() calls during open(). Patch by
+ Bohuslav Kabrda.
-- Fix breakage in TestSuite.countTestCases() introduced by issue #11798.
+- Issue #21863: cProfile now displays the module name of C extension functions,
+ in addition to their own name.
-- Issue #20108: Avoid parameter name clash in inspect.getcallargs().
+- Issue #11453: asyncore: emit a ResourceWarning when an unclosed file_wrapper
+ object is destroyed. The destructor now closes the file if needed. The
+ close() method can now be called twice: the second call does nothing.
-- Issue #19918: Fix PurePath.relative_to() under Windows.
+- Issue #21858: Better handling of Python exceptions in the sqlite3 module.
-- Issue #19422: Explicitly disallow non-SOCK_STREAM sockets in the ssl
- module, rather than silently let them emit clear text data.
+- Issue #21476: Make sure the email.parser.BytesParser TextIOWrapper is
+ discarded after parsing, so the input file isn't unexpectedly closed.
-- Issue #20046: Locale alias table no longer contains entities which can be
- calculated. Generalized support of the euro modifier.
+- Issue #20295: imghdr now recognizes OpenEXR format images.
-- Issue #20027: Fixed locale aliases for devanagari locales.
+- Issue #21729: Used the "with" statement in the dbm.dumb module to ensure
+ files closing. Patch by Claudiu Popa.
-- Issue #20067: Tkinter variables now work when wantobjects is false.
+- Issue #21491: socketserver: Fix a race condition in child processes reaping.
-- Issue #19020: Tkinter now uses splitlist() instead of split() in configure
- methods.
+- Issue #21719: Added the ``st_file_attributes`` field to os.stat_result on
+ Windows.
-- Issue #19744: ensurepip now provides a better error message when Python is
- built without SSL/TLS support (pip currently requires that support to run,
- even if only operating with local wheel files)
+- Issue #21832: Require named tuple inputs to be exact strings.
-- Issue #19734: ensurepip now ignores all pip environment variables to avoid
- odd behaviour based on user configuration settings
+- Issue #21722: The distutils "upload" command now exits with a non-zero
+ return code when uploading fails. Patch by Martin Dengler.
-- Fix TypeError on "setup.py upload --show-response".
+- Issue #21723: asyncio.Queue: support any type of number (ex: float) for the
+ maximum size. Patch written by Vajrasky Kok.
-- Issue #20045: Fix "setup.py register --list-classifiers".
+- Issue #21711: support for "site-python" directories has now been removed
+ from the site module (it was deprecated in 3.4).
-- Issue #18879: When a method is looked up on a temporary file, avoid closing
- the file before the method is possibly called.
+- Issue #17552: new socket.sendfile() method allowing to send a file over a
+ socket by using high-performance os.sendfile() on UNIX.
+ Patch by Giampaolo Rodola'.
-- Issue #20037: Avoid crashes when opening a text file late at interpreter
- shutdown.
+- Issue #18039: dbm.dump.open() now always creates a new database when the
+ flag has the value 'n'. Patch by Claudiu Popa.
-- Issue #19967: Thanks to the PEP 442, asyncio.Future now uses a
- destructor to log uncaught exceptions, instead of the dedicated
- _TracebackLogger class.
+- Issue #21326: Add a new is_closed() method to asyncio.BaseEventLoop.
+ run_forever() and run_until_complete() methods of asyncio.BaseEventLoop now
+ raise an exception if the event loop was closed.
-- Added a Task.current_task() class method to asyncio.
+- Issue #21766: Prevent a security hole in CGIHTTPServer by URL unquoting paths
+ before checking for a CGI script at that path.
-- Issue #19850: Set SA_RESTART in asyncio when registering a signal
- handler to limit EINTR occurrences.
+- Issue #21310: Fixed possible resource leak in failed open().
-- Implemented write flow control in asyncio for proactor event loop (Windows).
+- Issue #21256: Printout of keyword args should be in deterministic order in
+ a mock function call. This will help to write better doctests.
-- Change write buffer in asyncio use to avoid O(N**2) behavior. Make
- write()/sendto() accept bytearray/memoryview.
+- Issue #21677: Fixed chaining nonnormalized exceptions in io close() methods.
-- Issue #20034: Updated alias mapping to most recent locale.alias file
- from X.org distribution using makelocalealias.py.
+- Issue #11709: Fix the pydoc.help function to not fail when sys.stdin is not a
+ valid file.
-- Issue #5815: Fixed support for locales with modifiers. Fixed support for
- locale encodings with hyphens.
+- Issue #21515: tempfile.TemporaryFile now uses os.O_TMPFILE flag is available.
-- Issue #20026: Fix the sqlite module to handle correctly invalid isolation
- level (wrong type).
+- Issue #13223: Fix pydoc.writedoc so that the HTML documentation for methods
+ that use 'self' in the example code is generated correctly.
-- Issue #18829: csv.Dialect() now checks type for delimiter, escapechar and
- quotechar fields. Original patch by Vajrasky Kok.
+- Issue #21463: In urllib.request, fix pruning of the FTP cache.
-- Issue #19855: uuid.getnode() on Unix now looks on the PATH for the
- executables used to find the mac address, with /sbin and /usr/sbin as
- fallbacks.
+- Issue #21618: The subprocess module could fail to close open fds that were
+ inherited by the calling process and already higher than POSIX resource
+ limits would otherwise allow. On systems with a functioning /proc/self/fd
+ or /dev/fd interface the max is now ignored and all fds are closed.
-- Issue #20007: HTTPResponse.read(0) no more prematurely closes connection.
- Original patch by Simon Sapin.
+- Issue #20383: Introduce importlib.util.module_from_spec() as the preferred way
+ to create a new module.
-- Issue #19946: multiprocessing now uses runpy to initialize __main__ in
- child processes when necessary, allowing it to correctly handle scripts
- without suffixes and submodules that use explicit relative imports or
- otherwise rely on parent modules being correctly imported prior to
- execution.
+- Issue #21552: Fixed possible integer overflow of too long string lengths in
+ the tkinter module on 64-bit platforms.
-- Issue #19921: When Path.mkdir() is called with parents=True, any missing
- parent is created with the default permissions, ignoring the mode argument
- (mimicking the POSIX "mkdir -p" command).
+- Issue #14315: The zipfile module now ignores extra fields in the central
+ directory that are too short to be parsed instead of letting a struct.unpack
+ error bubble up as this "bad data" appears in many real world zip files in
+ the wild and is ignored by other zip tools.
-- Issue #19887: Improve the Path.resolve() algorithm to support certain
- symlink chains.
+- Issue #13742: Added "key" and "reverse" parameters to heapq.merge().
+ (First draft of patch contributed by Simon Sapin.)
-- Issue #19912: Fixed numerous bugs in ntpath.splitunc().
+- Issue #21402: tkinter.ttk now works when default root window is not set.
-- Issue #19911: ntpath.splitdrive() now correctly processes the 'İ' character
- (U+0130, LATIN CAPITAL LETTER I WITH DOT ABOVE).
+- Issue #3015: _tkinter.create() now creates tkapp object with wantobject=1 by
+ default.
-- Issue #19532: python -m compileall with no filename/directory arguments now
- respects the -f and -q flags instead of ignoring them.
+- Issue #10203: sqlite3.Row now truly supports sequence protocol. In particulr
+ it supports reverse() and negative indices. Original patch by Claudiu Popa.
-- Issue #19623: Fixed writing to unseekable files in the aifc module.
+- Issue #18807: If copying (no symlinks) specified for a venv, then the python
+ interpreter aliases (python, python3) are now created by copying rather than
+ symlinking.
-- Issue #19946: multiprocessing.spawn now raises ImportError when the module to
- be used as the main module cannot be imported.
+- Issue #20197: Added support for the WebP image type in the imghdr module.
+ Patch by Fabrice Aneche and Claudiu Popa.
-- Issue #17919: select.poll.register() again works with poll.POLLNVAL on AIX.
- Fixed integer overflow in the eventmask parameter.
+- Issue #21513: Speedup some properties of IP addresses (IPv4Address,
+ IPv6Address) such as .is_private or .is_multicast.
-- Issue #19063: if a Charset's body_encoding was set to None, the email
- package would generate a message claiming the Content-Transfer-Encoding
- was 7bit, and produce garbage output for the content. This now works.
- A couple of other set_payload mishandlings of non-ASCII are also fixed.
- In addition, calling set_payload with a string argument without
- specifying a charset now raises an error (this is a new error in 3.4).
+- Issue #21137: Improve the repr for threading.Lock() and its variants
+ by showing the "locked" or "unlocked" status. Patch by Berker Peksag.
-- Issue #15475: Add __sizeof__ implementations for itertools objects.
+- Issue #21538: The plistlib module now supports loading of binary plist files
+ when reference or offset size is not a power of two.
-- Issue #19944: Fix importlib.find_spec() so it imports parents as needed
- and move the function to importlib.util.
+- Issue #21455: Add a default backlog to socket.listen().
-- Issue #19880: Fix a reference leak in unittest.TestCase. Explicitly break
- reference cycles between frames and the _Outcome instance.
+- Issue #21525: Most Tkinter methods which accepted tuples now accept lists too.
-- Issue #17429: platform.linux_distribution() now decodes files from the UTF-8
- encoding with the surrogateescape error handler, instead of decoding from the
- locale encoding in strict mode. It fixes the function on Fedora 19 which is
- probably the first major distribution release with a non-ASCII name. Patch
- written by Toshio Kuratomi.
+- Issue #22166: With the assistance of a new internal _codecs._forget_codec
+ helping function, test_codecs now clears the encoding caches to avoid the
+ appearance of a reference leak
-- Issue #19343: Expose FreeBSD-specific APIs in resource module. Original
- patch by Koobs.
+- Issue #22236: Tkinter tests now don't reuse default root window. New root
+ window is created for every test class.
-- Issue #19929: Call os.read with 32768 within subprocess.Popen.communicate
- rather than 4096 for efficiency. A microbenchmark shows Linux and OS X
- both using ~50% less cpu time this way.
+- Issue #10744: Fix PEP 3118 format strings on ctypes objects with a nontrivial
+ shape.
-- Issue #19506: Use a memoryview to avoid a data copy when piping data
- to stdin within subprocess.Popen.communicate. 5-10% less cpu usage.
+- Issue #20826: Optimize ipaddress.collapse_addresses().
-- Issue #19876: selectors unregister() no longer raises ValueError or OSError
- if the FD is closed (as long as it was registered).
+- Issue #21487: Optimize ipaddress.summarize_address_range() and
+ ipaddress.{IPv4Network,IPv6Network}.subnets().
-- Issue #19908: pathlib now joins relative Windows paths correctly when a drive
- is present. Original patch by Antoine Pitrou.
+- Issue #21486: Optimize parsing of netmasks in ipaddress.IPv4Network and
+ ipaddress.IPv6Network.
-- Issue #19296: Silence compiler warning in dbm_open
+- Issue #13916: Disallowed the surrogatepass error handler for non UTF-*
+ encodings.
-- Issue #6784: Strings from Python 2 can now be unpickled as bytes
- objects by setting the encoding argument of Unpickler to be 'bytes'.
- Initial patch by Merlijn van Deen.
+- Issue #20998: Fixed re.fullmatch() of repeated single character pattern
+ with ignore case. Original patch by Matthew Barnett.
-- Issue #19839: Fix regression in bz2 module's handling of non-bzip2 data at
- EOF, and analogous bug in lzma module.
+- Issue #21075: fileinput.FileInput now reads bytes from standard stream if
+ binary mode is specified. Patch by Sam Kimbrel.
-- Issue #19881: Fix pickling bug where cpickle would emit bad pickle data for
- large bytes string (i.e., with size greater than 2**32-1).
+- Issue #19775: Add a samefile() method to pathlib Path objects. Initial
+ patch by Vajrasky Kok.
-- Issue #19138: doctest's IGNORE_EXCEPTION_DETAIL now allows a match when
- no exception detail exists (no colon following the exception's name, or
- a colon does follow but no text follows the colon).
+- Issue #21226: Set up modules properly in PyImport_ExecCodeModuleObject
+ (and friends).
-- Issue #19927: Add __eq__ to path-based loaders in importlib.
+- Issue #21398: Fix an unicode error in the pydoc pager when the documentation
+ contains characters not encodable to the stdout encoding.
-- Issue #19827: On UNIX, setblocking() and settimeout() methods of
- socket.socket can now avoid a second syscall if the ioctl() function can be
- used, or if the non-blocking flag of the socket is unchanged.
+- Issue #16531: ipaddress.IPv4Network and ipaddress.IPv6Network now accept
+ an (address, netmask) tuple argument, so as to easily construct network
+ objects from existing addresses.
-- Issue #19785: smtplib now supports SSLContext.check_hostname and server name
- indication for TLS/SSL connections.
+- Issue #21156: importlib.abc.InspectLoader.source_to_code() is now a
+ staticmethod.
-- Issue #19784: poplib now supports SSLContext.check_hostname and server name
- indication for TLS/SSL connections.
+- Issue #21424: Simplified and optimized heaqp.nlargest() and nmsmallest()
+ to make fewer tuple comparisons.
-- Issue #19783: nntplib now supports SSLContext.check_hostname and server name
- indication for TLS/SSL connections.
+- Issue #21396: Fix TextIOWrapper(..., write_through=True) to not force a
+ flush() on the underlying binary stream. Patch by akira.
-- Issue #19782: imaplib now supports SSLContext.check_hostname and server name
- indication for TLS/SSL connections.
+- Issue #18314: Unlink now removes junctions on Windows. Patch by Kim Gräsman
-- Issue #20123: Fix pydoc.synopsis() for "binary" modules.
+- Issue #21088: Bugfix for curses.window.addch() regression in 3.4.0.
+ In porting to Argument Clinic, the first two arguments were reversed.
-- Issue #19834: Support unpickling of exceptions pickled by Python 2.
+- Issue #21407: _decimal: The module now supports function signatures.
-- Issue #19781: ftplib now supports SSLContext.check_hostname and server name
- indication for TLS/SSL connections.
+- Issue #10650: Remove the non-standard 'watchexp' parameter from the
+ Decimal.quantize() method in the Python version. It had never been
+ present in the C version.
-- Issue #19509: Add SSLContext.check_hostname to match the peer's certificate
- with server_hostname on handshake.
+- Issue #21469: Reduced the risk of false positives in robotparser by
+ checking to make sure that robots.txt has been read or does not exist
+ prior to returning True in can_fetch().
-- Issue #15798: Fixed subprocess.Popen() to no longer fail if file
- descriptor 0, 1 or 2 is closed.
+- Issue #19414: Have the OrderedDict mark deleted links as unusable.
+ This gives an early failure if the link is deleted during iteration.
-- Issue #17897: Optimized unpickle prefetching.
+- Issue #21421: Add __slots__ to the MappingViews ABC.
+ Patch by Josh Rosenberg.
-- Issue #3693: Make the error message more helpful when the array.array()
- constructor is given a str. Move the array module typecode documentation to
- the docstring of the constructor.
+- Issue #21101: Eliminate double hashing in the C speed-up code for
+ collections.Counter().
-- Issue #19088: Fixed incorrect caching of the copyreg module in
- object.__reduce__() and object.__reduce_ex__().
+- Issue #21321: itertools.islice() now releases the reference to the source
+ iterator when the slice is exhausted. Patch by Anton Afanasyev.
-- Issue #19698: Removed exec_module() methods from
- importlib.machinery.BuiltinImporter and ExtensionFileLoader.
+- Issue #21057: TextIOWrapper now allows the underlying binary stream's
+ read() or read1() method to return an arbitrary bytes-like object
+ (such as a memoryview). Patch by Nikolaus Rath.
-- Issue #18864: Added a setter for ModuleSpec.has_location.
+- Issue #20951: SSLSocket.send() now raises either SSLWantReadError or
+ SSLWantWriteError on a non-blocking socket if the operation would block.
+ Previously, it would return 0. Patch by Nikolaus Rath.
-- Fixed _pickle.Unpickler to not fail when loading empty strings as
- persistent IDs.
+- Issue #13248: removed previously deprecated asyncore.dispatcher __getattr__
+ cheap inheritance hack.
-- Issue #11480: Fixed copy.copy to work with classes with custom metaclasses.
- Patch by Daniel Urban.
+- Issue #9815: assertRaises now tries to clear references to local variables
+ in the exception's traceback.
-- Issue #6477: Added support for pickling the types of built-in singletons
- (i.e., Ellipsis, NotImplemented, None).
+- Issue #19940: ssl.cert_time_to_seconds() now interprets the given time
+ string in the UTC timezone (as specified in RFC 5280), not the local
+ timezone.
-- Issue #19713: Add remaining PEP 451-related deprecations and move away
- from using find_module/find_loaer/load_module.
+- Issue #13204: Calling sys.flags.__new__ would crash the interpreter,
+ now it raises a TypeError.
-- Issue #19708: Update pkgutil to use the new importer APIs.
+- Issue #19385: Make operations on a closed dbm.dumb database always raise the
+ same exception.
-- Issue #19703: Update pydoc to use the new importer APIs.
+- Issue #21207: Detect when the os.urandom cached fd has been closed or
+ replaced, and open it anew.
-- Issue #19851: Fixed a regression in reloading sub-modules.
+- Issue #21291: subprocess's Popen.wait() is now thread safe so that
+ multiple threads may be calling wait() or poll() on a Popen instance
+ at the same time without losing the Popen.returncode value.
-- ssl.create_default_context() sets OP_NO_COMPRESSION to prevent CRIME.
+- Issue #21127: Path objects can now be instantiated from str subclass
+ instances (such as ``numpy.str_``).
-- Issue #19802: Add socket.SO_PRIORITY.
+- Issue #15002: urllib.response object to use _TemporaryFileWrapper (and
+ _TemporaryFileCloser) facility. Provides a better way to handle file
+ descriptor close. Patch contributed by Christian Theune.
-- Issue #11508: Fixed uuid.getnode() and uuid.uuid1() on environment with
- virtual interface. Original patch by Kent Frazier.
+- Issue #12220: mindom now raises a custom ValueError indicating it doesn't
+ support spaces in URIs instead of letting a 'split' ValueError bubble up.
-- Issue #11489: JSON decoder now accepts lone surrogates.
+- Issue #21068: The ssl.PROTOCOL* constants are now enum members.
-- Issue #19545: Avoid chained exceptions while passing stray % to
- time.strptime(). Initial patch by Claudiu Popa.
+- Issue #21276: posixmodule: Don't define USE_XATTRS on KFreeBSD and the Hurd.
-IDLE
-----
+- Issue #21262: New method assert_not_called for Mock.
+ It raises AssertionError if the mock has been called.
-- Issue #20058: sys.stdin.readline() in IDLE now always returns only one line.
+- Issue #21238: New keyword argument `unsafe` to Mock. It raises
+ `AttributeError` incase of an attribute startswith assert or assret.
-- Issue #19481: print() of string subclass instance in IDLE no longer hangs.
+- Issue #20896: ssl.get_server_certificate() now uses PROTOCOL_SSLv23, not
+ PROTOCOL_SSLv3, for maximum compatibility.
-- Issue #18270: Prevent possible IDLE AttributeError on OS X when no initial
- shell window is present.
+- Issue #21239: patch.stopall() didn't work deterministically when the same
+ name was patched more than once.
-Tests
------
+- Issue #21203: Updated fileConfig and dictConfig to remove inconsistencies.
+ Thanks to Jure Koren for the patch.
-- Issue #20055: Fix test_shutil under Windows with symlink privileges held.
- Patch by Vajrasky Kok.
+- Issue #21222: Passing name keyword argument to mock.create_autospec now
+ works.
-- Issue #20070: Don't run test_urllib2net when network resources are not
- enabled.
+- Issue #21197: Add lib64 -> lib symlink in venvs on 64-bit non-OS X POSIX.
-- Issue #19938: Re-enabled test_bug_1333982 in test_dis, which had been
- disabled since 3.0 due to the changes in listcomp handling.
+- Issue #17498: Some SMTP servers disconnect after certain errors, violating
+ strict RFC conformance. Instead of losing the error code when we issue the
+ subsequent RSET, smtplib now returns the error code and defers raising the
+ SMTPServerDisconnected error until the next command is issued.
-- Issue #19320: test_tcl no longer fails when wantobjects is false.
+- Issue #17826: setting an iterable side_effect on a mock function created by
+ create_autospec now works. Patch by Kushal Das.
-- Issue #19919: Fix flaky SSL test. connect_ex() sometimes returns
- EWOULDBLOCK on Windows or VMs hosted on Windows.
+- Issue #7776: Fix ``Host:`` header and reconnection when using
+ http.client.HTTPConnection.set_tunnel(). Patch by Nikolaus Rath.
-- Issue #19912: Added tests for ntpath.splitunc().
+- Issue #20968: unittest.mock.MagicMock now supports division.
+ Patch by Johannes Baiter.
-- Issue #19828: Fixed test_site when the whole suite is run with -S.
+- Fix arbitrary memory access in JSONDecoder.raw_decode with a negative second
+ parameter. Bug reported by Guido Vranken.
-- Issue #19928: Implemented a test for repr() of cell objects.
+- Issue #21169: getpass now handles non-ascii characters that the
+ input stream encoding cannot encode by re-encoding using the
+ replace error handler.
-- Issue #19535: Fixed test_docxmlrpc, test_functools, test_inspect, and
- test_statistics when python is run with -OO.
+- Issue #21171: Fixed undocumented filter API of the rot13 codec.
+ Patch by Berker Peksag.
-- Issue #19926: Removed unneeded test_main from test_abstract_numbers.
- Patch by Vajrasky Kok.
+- Issue #20539: Improved math.factorial error message for large positive inputs
+ and changed exception type (OverflowError -> ValueError) for large negative
+ inputs.
-- Issue #19572: More skipped tests explicitly marked as skipped.
+- Issue #21172: isinstance check relaxed from dict to collections.Mapping.
-- Issue #19595, #19987: Re-enabled a long-disabled test in test_winsound.
+- Issue #21155: asyncio.EventLoop.create_unix_server() now raises a ValueError
+ if path and sock are specified at the same time.
-- Issue #19588: Fixed tests in test_random that were silently skipped most
- of the time. Patch by Julian Gindi.
+- Issue #21136: Avoid unnecessary normalization of Fractions resulting from
+ power and other operations. Patch by Raymond Hettinger.
-Build
------
+- Issue #17621: Introduce importlib.util.LazyLoader.
-- Issue #19728: Enable pip installation by default on Windows.
+- Issue #21076: signal module constants were turned into enums.
+ Patch by Giampaolo Rodola'.
-- Issue #16136: Remove VMS support
+- Issue #20636: Improved the repr of Tkinter widgets.
-- Issue #18215: Add script Tools/ssl/test_multiple_versions.py to compile and
- run Python's unit tests with multiple versions of OpenSSL.
+- Issue #19505: The items, keys, and values views of OrderedDict now support
+ reverse iteration using reversed().
-- Issue #19922: define _INCLUDE__STDC_A1_SOURCE in HP-UX to include mbstate_t
- for mbrtowc().
+- Issue #21149: Improved thread-safety in logging cleanup during interpreter
+ shutdown. Thanks to Devin Jeanpierre for the patch.
-- Issue #19788: kill_python(_d).exe is now run as a PreBuildEvent on the
- pythoncore sub-project. This should prevent build errors due a previous
- build's python(_d).exe still running.
+- Issue #21058: Fix a leak of file descriptor in
+ :func:`tempfile.NamedTemporaryFile`, close the file descriptor if
+ :func:`io.open` fails
-Documentation
--------------
+- Issue #21200: Return None from pkgutil.get_loader() when __spec__ is missing.
-- Issue #20265: Updated some parts of the Using Windows document.
+- Issue #21013: Enhance ssl.create_default_context() when used for server side
+ sockets to provide better security by default.
-- Issue #20266: Updated some parts of the Windows FAQ.
+- Issue #20145: `assertRaisesRegex` and `assertWarnsRegex` now raise a
+ TypeError if the second argument is not a string or compiled regex.
-- Issue #20255: Updated the about and bugs pages.
+- Issue #20633: Replace relative import by absolute import.
-- Issue #20253: Fixed a typo in the ipaddress docs that advertised an
- illegal attribute name. Found by INADA Naoki.
+- Issue #20980: Stop wrapping exception when using ThreadPool.
-- Issue #18840: Introduce the json module in the tutorial, and de-emphasize
- the pickle module.
+- Issue #21082: In os.makedirs, do not set the process-wide umask. Note this
+ changes behavior of makedirs when exist_ok=True.
-- Issue #19845: Updated the Compiling Python on Windows section.
+- Issue #20990: Fix issues found by pyflakes for multiprocessing.
-- Issue #19795: Improved markup of True/False constants.
+- Issue #21015: SSL contexts will now automatically select an elliptic
+ curve for ECDH key exchange on OpenSSL 1.0.2 and later, and otherwise
+ default to "prime256v1".
-Tools/Demos
------------
+- Issue #21000: Improve the command-line interface of json.tool.
-- Issue #19659: Added documentation for Argument Clinic.
+- Issue #20995: Enhance default ciphers used by the ssl module to enable
+ better security an prioritize perfect forward secrecy.
-- Issue #19976: Argument Clinic METH_NOARGS functions now always
- take two parameters.
+- Issue #20884: Don't assume that __file__ is defined on importlib.__init__.
+- Issue #21499: Ignore __builtins__ in several test_importlib.test_api tests.
-What's New in Python 3.4.0 Beta 1?
-==================================
+- Issue #20627: xmlrpc.client.ServerProxy is now a context manager.
-Release date: 2013-11-24
+- Issue #19165: The formatter module now raises DeprecationWarning instead of
+ PendingDeprecationWarning.
-Core and Builtins
------------------
+- Issue #13936: Remove the ability of datetime.time instances to be considered
+ false in boolean contexts.
-- Use the repr of a module name in more places in import, especially
- exceptions.
+- Issue #18931: selectors module now supports /dev/poll on Solaris.
+ Patch by Giampaolo Rodola'.
-- Issue #19619: str.encode, bytes.decode and bytearray.decode now use an
- internal API to throw LookupError for known non-text encodings, rather
- than attempting the encoding or decoding operation and then throwing a
- TypeError for an unexpected output type. (The latter mechanism remains
- in place for third party non-text encodings)
+- Issue #19977: When the ``LC_TYPE`` locale is the POSIX locale (``C`` locale),
+ :py:data:`sys.stdin` and :py:data:`sys.stdout` are now using the
+ ``surrogateescape`` error handler, instead of the ``strict`` error handler.
-- Issue #19183: Implement PEP 456 'secure and interchangeable hash algorithm'.
- Python now uses SipHash24 on all major platforms.
+- Issue #20574: Implement incremental decoder for cp65001 code (Windows code
+ page 65001, Microsoft UTF-8).
-- Issue #12892: The utf-16* and utf-32* encoders no longer allow surrogate code
- points (U+D800-U+DFFF) to be encoded. The utf-32* decoders no longer decode
- byte sequences that correspond to surrogate code points. The surrogatepass
- error handler now works with the utf-16* and utf-32* codecs. Based on
- patches by Victor Stinner and Kang-Hao (Kenny) Lu.
+- Issue #20879: Delay the initialization of encoding and decoding tables for
+ base32, ascii85 and base85 codecs in the base64 module, and delay the
+ initialization of the unquote_to_bytes() table of the urllib.parse module, to
+ not waste memory if these modules are not used.
-- Issue #17806: Added keyword-argument support for "tabsize" to
- str/bytes.expandtabs().
+- Issue #19157: Include the broadcast address in the usuable hosts for IPv6
+ in ipaddress.
-- Issue #17828: Output type errors in str.encode(), bytes.decode() and
- bytearray.decode() now direct users to codecs.encode() or codecs.decode()
- as appropriate.
+- Issue #11599: When an external command (e.g. compiler) fails, distutils now
+ prints out the whole command line (instead of just the command name) if the
+ environment variable DISTUTILS_DEBUG is set.
-- Issue #17828: The interpreter now attempts to chain errors that occur in
- codec processing with a replacement exception of the same type that
- includes the codec name in the error message. It ensures it only does this
- when the creation of the replacement exception won't lose any information.
+- Issue #4931: distutils should not produce unhelpful "error: None" messages
+ anymore. distutils.util.grok_environment_error is kept but doc-deprecated.
-- Issue #19466: Clear the frames of daemon threads earlier during the
- Python shutdown to call objects destructors. So "unclosed file" resource
- warnings are now corretly emitted for daemon threads.
+- Issue #20875: Prevent possible gzip "'read' is not defined" NameError.
+ Patch by Claudiu Popa.
-- Issue #19514: Deduplicate some _Py_IDENTIFIER declarations.
- Patch by Andrei Dorian Duma.
+- Issue #11558: ``email.message.Message.attach`` now returns a more
+ useful error message if ``attach`` is called on a message for which
+ ``is_multipart`` is False.
-- Issue #17936: Fix O(n**2) behaviour when adding or removing many subclasses
- of a given type.
+- Issue #20283: RE pattern methods now accept the string keyword parameters
+ as documented. The pattern and source keyword parameters are left as
+ deprecated aliases.
-- Issue #19428: zipimport now handles errors when reading truncated or invalid
- ZIP archive.
+- Issue #20778: Fix modulefinder to work with bytecode-only modules.
-- Issue #18408: Add a new PyFrame_FastToLocalsWithError() function to handle
- exceptions when merging fast locals into f_locals of a frame.
- PyEval_GetLocals() now raises an exception and return NULL on failure.
+- Issue #20791: copy.copy() now doesn't make a copy when the input is
+ a bytes object. Initial patch by Peter Otten.
-- Issue #19369: Optimized the usage of __length_hint__().
+- Issue #19748: On AIX, time.mktime() now raises an OverflowError for year
+ outsize range [1902; 2037].
-- Issue #18603: Ensure that PyOS_mystricmp and PyOS_mystrnicmp are in the
- Python executable and not removed by the linker's optimizer.
+- Issue #19573: inspect.signature: Use enum for parameter kind constants.
-- Issue #19306: Add extra hints to the faulthandler module's stack
- dumps that these are "upside down".
+- Issue #20726: inspect.signature: Make Signature and Parameter picklable.
-Library
--------
+- Issue #17373: Add inspect.Signature.from_callable method.
-- Issue #3158: doctest can now find doctests in functions and methods
- written in C.
+- Issue #20378: Improve repr of inspect.Signature and inspect.Parameter.
-- Issue #13477: Added command line interface to the tarfile module.
- Original patch by Berker Peksag.
+- Issue #20816: Fix inspect.getcallargs() to raise correct TypeError for
+ missing keyword-only arguments. Patch by Jeremiah Lowin.
-- Issue #19674: inspect.signature() now produces a correct signature
- for some builtins.
+- Issue #20817: Fix inspect.getcallargs() to fail correctly if more
+ than 3 arguments are missing. Patch by Jeremiah Lowin.
-- Issue #19722: Added opcode.stack_effect(), which
- computes the stack effect of bytecode instructions.
+- Issue #6676: Ensure a meaningful exception is raised when attempting
+ to parse more than one XML document per pyexpat xmlparser instance.
+ (Original patches by Hirokazu Yamamoto and Amaury Forgeot d'Arc, with
+ suggested wording by David Gutteridge)
-- Issue #19735: Implement private function ssl._create_stdlib_context() to
- create SSLContext objects in Python's stdlib module. It provides a single
- configuration point and makes use of SSLContext.load_default_certs().
+- Issue #21117: Fix inspect.signature to better support functools.partial.
+ Due to the specifics of functools.partial implementation,
+ positional-or-keyword arguments passed as keyword arguments become
+ keyword-only.
-- Issue #16203: Add re.fullmatch() function and regex.fullmatch() method,
- which anchor the pattern at both ends of the string to match.
- Original patch by Matthew Barnett.
+- Issue #20334: inspect.Signature and inspect.Parameter are now hashable.
+ Thanks to Antony Lee for bug reports and suggestions.
-- Issue #13592: Improved the repr for regular expression pattern objects.
- Based on patch by Hugo Lopes Tavares.
+- Issue #15916: doctest.DocTestSuite returns an empty unittest.TestSuite instead
+ of raising ValueError if it finds no tests
-- Issue #19641: Added the audioop.byteswap() function to convert big-endian
- samples to little-endian and vice versa.
+- Issue #21209: Fix asyncio.tasks.CoroWrapper to workaround a bug
+ in yield-from implementation in CPythons prior to 3.4.1.
-- Issue #15204: Deprecated the 'U' mode in file-like objects.
+- asyncio: Add gi_{frame,running,code} properties to CoroWrapper
+ (upstream issue #163).
-- Issue #17810: Implement PEP 3154, pickle protocol 4.
+- Issue #21311: Avoid exception in _osx_support with non-standard compiler
+ configurations. Patch by John Szakmeister.
-- Issue #19668: Added support for the cp1125 encoding.
+- Issue #11571: Ensure that the turtle window becomes the topmost window
+ when launched on OS X.
-- Issue #19689: Add ssl.create_default_context() factory function. It creates
- a new SSLContext object with secure default settings.
+- Issue #21801: Validate that __signature__ is None or an instance of Signature.
-- Issue #19727: os.utime(..., None) is now potentially more precise
- under Windows.
+- Issue #21923: Prevent AttributeError in distutils.sysconfig.customize_compiler
+ due to possible uninitialized _config_vars.
-- Issue #17201: ZIP64 extensions now are enabled by default. Patch by
- William Mallard.
+- Issue #21323: Fix http.server to again handle scripts in CGI subdirectories,
+ broken by the fix for security issue #19435. Patch by Zach Byrne.
-- Issue #19292: Add SSLContext.load_default_certs() to load default root CA
- certificates from default stores or system stores. By default the method
- loads CA certs for authentication of server certs.
+- Issue #22733: Fix ffi_prep_args not zero-extending argument values correctly
+ on 64-bit Windows.
-- Issue #19673: Add pathlib to the stdlib as a provisional module (PEP 428).
+- Issue #23302: Default to TCP_NODELAY=1 upon establishing an HTTPConnection.
+ Removed use of hard-coded MSS as it's an optimization that's no longer needed
+ with Nagle disabled.
-- Issue #16596: pdb in a generator now properly skips over yield and
- yield from rather than stepping out of the generator into its
- caller. (This is essential for stepping through asyncio coroutines.)
+IDLE
+----
-- Issue #17916: Added dis.Bytecode.from_traceback() and
- dis.Bytecode.current_offset to easily display "current instruction"
- markers in the new disassembly API (Patch by Claudiu Popa).
+- Issue #20577: Configuration of the max line length for the FormatParagraph
+ extension has been moved from the General tab of the Idle preferences dialog
+ to the FormatParagraph tab of the Config Extensions dialog.
+ Patch by Tal Einat.
-- Issue #19552: venv now supports bootstrapping pip into virtual environments
+- Issue #16893: Update Idle doc chapter to match current Idle and add new
+ information.
-- Issue #17134: Finalize interface to Windows' certificate store. Cert and
- CRL enumeration are now two functions. enum_certificates() also returns
- purpose flags as set of OIDs.
+- Issue #3068: Add Idle extension configuration dialog to Options menu.
+ Changes are written to HOME/.idlerc/config-extensions.cfg.
+ Original patch by Tal Einat.
-- Issue #19555: Restore sysconfig.get_config_var('SO'), (and the distutils
- equivalent) with a DeprecationWarning pointing people at $EXT_SUFFIX.
+- Issue #16233: A module browser (File : Class Browser, Alt+C) requires a
+ editor window with a filename. When Class Browser is requested otherwise,
+ from a shell, output window, or 'Untitled' editor, Idle no longer displays
+ an error box. It now pops up an Open Module box (Alt+M). If a valid name
+ is entered and a module is opened, a corresponding browser is also opened.
-- Issue #8813: Add SSLContext.verify_flags to change the verification flags
- of the context in order to enable certification revocation list (CRL)
- checks or strict X509 rules.
+- Issue #4832: Save As to type Python files automatically adds .py to the
+ name you enter (even if your system does not display it). Some systems
+ automatically add .txt when type is Text files.
-- Issue #18294: Fix the zlib module to make it 64-bit safe.
+- Issue #21986: Code objects are not normally pickled by the pickle module.
+ To match this, they are no longer pickled when running under Idle.
-- Issue #19682: Fix compatibility issue with old version of OpenSSL that
- was introduced by Issue #18379.
+- Issue #17390: Adjust Editor window title; remove 'Python',
+ move version to end.
-- Issue #14455: plistlib now supports binary plists and has an updated API.
+- Issue #14105: Idle debugger breakpoints no longer disappear
+ when inseting or deleting lines.
-- Issue #19633: Fixed writing not compressed 16- and 32-bit wave files on
- big-endian platforms.
+- Issue #17172: Turtledemo can now be run from Idle.
+ Currently, the entry is on the Help menu, but it may move to Run.
+ Patch by Ramchandra Apt and Lita Cho.
-- Issue #18379: SSLSocket.getpeercert() returns CA issuer AIA fields, OCSP
- and CRL distribution points.
+- Issue #21765: Add support for non-ascii identifiers to HyperParser.
-- Issue #18138: Implement cadata argument of SSLContext.load_verify_location()
- to load CA certificates and CRL from memory. It supports PEM and DER
- encoded strings.
+- Issue #21940: Add unittest for WidgetRedirector. Initial patch by Saimadhav
+ Heblikar.
-- Issue #18775: Add name and block_size attribute to HMAC object. They now
- provide the same API elements as non-keyed cryptographic hash functions.
+- Issue #18592: Add unittest for SearchDialogBase. Patch by Phil Webster.
-- Issue #17276: MD5 as default digestmod for HMAC is deprecated. The HMAC
- module supports digestmod names, e.g. hmac.HMAC('sha1').
+- Issue #21694: Add unittest for ParenMatch. Patch by Saimadhav Heblikar.
-- Issue #19449: in csv's writerow, handle non-string keys when generating the
- error message that certain keys are not in the 'fieldnames' list.
+- Issue #21686: add unittest for HyperParser. Original patch by Saimadhav
+ Heblikar.
-- Issue #13633: Added a new convert_charrefs keyword arg to HTMLParser that,
- when True, automatically converts all character references.
+- Issue #12387: Add missing upper(lower)case versions of default Windows key
+ bindings for Idle so Caps Lock does not disable them. Patch by Roger Serwy.
-- Issue #2927: Added the unescape() function to the html module.
+- Issue #21695: Closing a Find-in-files output window while the search is
+ still in progress no longer closes Idle.
-- Issue #8402: Added the escape() function to the glob module.
+- Issue #18910: Add unittest for textView. Patch by Phil Webster.
-- Issue #17618: Add Base85 and Ascii85 encoding/decoding to the base64 module.
+- Issue #18292: Add unittest for AutoExpand. Patch by Saihadhav Heblikar.
-- Issue #19634: time.strftime("%y") now raises a ValueError on AIX when given a
- year before 1900.
+- Issue #18409: Add unittest for AutoComplete. Patch by Phil Webster.
-- Fix test.support.bind_port() to not cause an error when Python was compiled
- on a system with SO_REUSEPORT defined in the headers but run on a system
- with an OS kernel that does not support that reasonably new socket option.
+- Issue #21477: htest.py - Improve framework, complete set of tests.
+ Patches by Saimadhav Heblikar
-- Fix compilation error under gcc of the ctypes module bundled libffi for arm.
+- Issue #18104: Add idlelib/idle_test/htest.py with a few sample tests to begin
+ consolidating and improving human-validated tests of Idle. Change other files
+ as needed to work with htest. Running the module as __main__ runs all tests.
-- Issue #19448: Add private API to SSL module to lookup ASN.1 objects by OID,
- NID, short name and long name.
+- Issue #21139: Change default paragraph width to 72, the PEP 8 recommendation.
-- Issue #19282: dbm.open now supports the context management protocol. (Inital
- patch by Claudiu Popa)
+- Issue #21284: Paragraph reformat test passes after user changes reformat width.
-- Issue #8311: Added support for writing any bytes-like objects in the aifc,
- sunau, and wave modules.
+- Issue #17654: Ensure IDLE menus are customized properly on OS X for
+ non-framework builds and for all variants of Tk.
-- Issue #5202: Added support for unseekable files in the wave module.
+- Issue #23180: Rename IDLE "Windows" menu item to "Window".
+ Patch by Al Sweigart.
-- Issue #19544 and Issue #1180: Restore global option to ignore
- ~/.pydistutils.cfg in Distutils, accidentally removed in backout of
- distutils2 changes.
+Build
+-----
-- Issue #19523: Closed FileHandler leak which occurred when delay was set.
+- Issue #15506: Use standard PKG_PROG_PKG_CONFIG autoconf macro in the configure
+ script.
-- Issue #19544 and Issue #6516: Restore support for --user and --group
- parameters to sdist command accidentally rolled back as part of the
- distutils2 rollback.
+- Issue #22935: Allow the ssl module to be compiled if openssl doesn't support
+ SSL 3.
-- Issue #13674: Prevented time.strftime from crashing on Windows when given
- a year before 1900 and a format of %y.
+- Issue #22592: Drop support of the Borland C compiler to build Python. The
+ distutils module still supports it to build extensions.
-- Issue #19406: implementation of the ensurepip module (part of PEP 453).
- Patch by Donald Stufft and Nick Coghlan.
+- Issue #22591: Drop support of MS-DOS, especially of the DJGPP compiler
+ (MS-DOS port of GCC).
-- Issue #19544 and Issue #6286: Restore use of urllib over http allowing use
- of http_proxy for Distutils upload command, a feature accidentally lost
- in the rollback of distutils2.
+- Issue #16537: Check whether self.extensions is empty in setup.py. Patch by
+ Jonathan Hosmer.
-- Issue #19544 and Issue #7457: Restore the read_pkg_file method to
- distutils.dist.DistributionMetadata accidentally removed in the undo of
- distutils2.
+- Issue #22359: Remove incorrect uses of recursive make. Patch by Jonas
+ Wagner.
-- Issue #16685: Added support for any bytes-like objects in the audioop module.
- Removed support for strings.
+- Issue #21958: Define HAVE_ROUND when building with Visual Studio 2013 and
+ above. Patch by Zachary Turner.
-- Issue #7171: Add Windows implementation of ``inet_ntop`` and ``inet_pton``
- to socket module. Patch by Atsuo Ishimoto.
+- Issue #18093: the programs that embed the CPython runtime are now in a
+ separate "Programs" directory, rather than being kept in the Modules
+ directory.
-- Issue #19261: Added support for writing 24-bit samples in the sunau module.
+- Issue #15759: "make suspicious", "make linkcheck" and "make doctest" in Doc/
+ now display special message when and only when there are failures.
-- Issue #1097797: Added CP273 encoding, used on IBM mainframes in
- Germany and Austria. Mapping provided by Michael Bierenfeld.
+- Issue #21141: The Windows build process no longer attempts to find Perl,
+ instead relying on OpenSSL source being configured and ready to build. The
+ ``PCbuild\build_ssl.py`` script has been re-written and re-named to
+ ``PCbuild\prepare_ssl.py``, and takes care of configuring OpenSSL source
+ for both 32 and 64 bit platforms. OpenSSL sources obtained from
+ svn.python.org will always be pre-configured and ready to build.
-- Issue #1575020: Fixed support of 24-bit wave files on big-endian platforms.
+- Issue #21037: Add a build option to enable AddressSanitizer support.
-- Issue #19378: Fixed a number of cases in the dis module where the new
- "file" parameter was not being honoured correctly
+- Issue #19962: The Windows build process now creates "python.bat" in the
+ root of the source tree, which passes all arguments through to the most
+ recently built interpreter.
-- Issue #19378: Removed the "dis.Bytecode.show_info" method
+- Issue #21285: Refactor and fix curses configure check to always search
+ in a ncursesw directory.
-- Issue #19378: Renamed the "dis.Bytecode.display_code" method to
- "dis.Bytecode.dis" and converted it to returning a string rather than
- printing output.
+- Issue #15234: For BerkelyDB and Sqlite, only add the found library and
+ include directories if they aren't already being searched. This avoids
+ an explicit runtime library dependency.
-- Issue #19378: the "line_offset" parameter in the new "dis.get_instructions"
- API has been renamed to "first_line" (and the default value and usage
- changed accordingly). This should reduce confusion with the more common use
- of "offset" in the dis docs to refer to bytecode offsets.
+- Issue #17861: Tools/scripts/generate_opcode_h.py automatically regenerates
+ Include/opcode.h from Lib/opcode.py if the later gets any change.
-- Issue #18678: Corrected spwd struct member names in spwd module:
- sp_nam->sp_namp, and sp_pwd->sp_pwdp. The old names are kept as extra
- structseq members, for backward compatibility.
+- Issue #20644: OS X installer build support for documentation build changes
+ in 3.4.1: assume externally supplied sphinx-build is available in /usr/bin.
-- Issue #6157: Fixed tkinter.Text.debug(). tkinter.Text.bbox() now raises
- TypeError instead of TclError on wrong number of arguments. Original patch
- by Guilherme Polo.
+- Issue #20022: Eliminate use of deprecated bundlebuilder in OS X builds.
-- Issue #10197: Rework subprocess.get[status]output to use subprocess
- functionality and thus to work on Windows. Patch by Nick Coghlan
+- Issue #15968: Incorporated Tcl, Tk, and Tix builds into the Windows build
+ solution.
-- Issue #6160: The bbox() method of tkinter.Spinbox now returns a tuple of
- integers instead of a string. Based on patch by Guilherme Polo.
+- Issue #17095: Fix Modules/Setup *shared* support.
-- Issue #19403: contextlib.redirect_stdout is now reentrant
+- Issue #21811: Anticipated fixes to support OS X versions > 10.9.
-- Issue #19286: Directories in ``package_data`` are no longer added to
- the filelist, preventing failure outlined in the ticket.
+- Issue #21166: Prevent possible segfaults and other random failures of
+ python --generate-posix-vars in pybuilddir.txt build target.
-- Issue #19480: HTMLParser now accepts all valid start-tag names as defined
- by the HTML5 standard.
+- Issue #18096: Fix library order returned by python-config.
-- Issue #15114: The html.parser module now raises a DeprecationWarning when the
- strict argument of HTMLParser or the HTMLParser.error method are used.
+- Issue #17219: Add library build dir for Python extension cross-builds.
-- Issue #19410: Undo the special-casing removal of '' for
- importlib.machinery.FileFinder.
+- Issue #22919: Windows build updated to support VC 14.0 (Visual Studio 2015),
+ which will be used for the official release.
-- Issue #19424: Fix the warnings module to accept filename containing surrogate
- characters.
+- Issue #21236: Build _msi.pyd with cabinet.lib instead of fci.lib
-- Issue #19435: Fix directory traversal attack on CGIHttpRequestHandler.
+- Issue #17128: Use private version of OpenSSL for OS X 10.5+ installer.
-- Issue #19227: Remove pthread_atfork() handler. The handler was added to
- solve #18747 but has caused issues.
+C API
+-----
-- Issue #19420: Fix reference leak in module initalization code of
- _hashopenssl.c
+- Issue #14203: Remove obsolete support for view==NULL in PyBuffer_FillInfo(),
+ bytearray_getbuffer(), bytesiobuf_getbuffer() and array_buffer_getbuf().
+ All functions now raise BufferError in that case.
-- Issue #19329: Optimized compiling charsets in regular expressions.
+- Issue #22445: PyBuffer_IsContiguous() now implements precise contiguity
+ tests, compatible with NumPy's NPY_RELAXED_STRIDES_CHECKING compilation
+ flag. Previously the function reported false negatives for corner cases.
-- Issue #19227: Try to fix deadlocks caused by re-seeding then OpenSSL
- pseudo-random number generator on fork().
+- Issue #22079: PyType_Ready() now checks that statically allocated type has
+ no dynamically allocated bases.
-- Issue #16037: HTTPMessage.readheaders() raises an HTTPException when more than
- 100 headers are read. Adapted from patch by Jyrki Pulliainen.
+- Issue #22453: Removed non-documented macro PyObject_REPR().
-- Issue #16040: CVE-2013-1752: nntplib: Limit maximum line lengths to 2048 to
- prevent readline() calls from consuming too much memory. Patch by Jyrki
- Pulliainen.
+- Issue #18395: Rename ``_Py_char2wchar()`` to :c:func:`Py_DecodeLocale`,
+ rename ``_Py_wchar2char()`` to :c:func:`Py_EncodeLocale`, and document
+ these functions.
-- Issue #16041: CVE-2013-1752: poplib: Limit maximum line lengths to 2048 to
- prevent readline() calls from consuming too much memory. Patch by Jyrki
- Pulliainen.
+- Issue #21233: Add new C functions: PyMem_RawCalloc(), PyMem_Calloc(),
+ PyObject_Calloc(), _PyObject_GC_Calloc(). bytes(int) is now using
+ ``calloc()`` instead of ``malloc()`` for large objects which is faster and
+ use less memory.
-- Issue #17997: Change behavior of ``ssl.match_hostname()`` to follow RFC 6125,
- for security reasons. It now doesn't match multiple wildcards nor wildcards
- inside IDN fragments.
+- Issue #20942: PyImport_ImportFrozenModuleObject() no longer sets __file__ to
+ match what importlib does; this affects _frozen_importlib as well as any
+ module loaded using imp.init_frozen().
-- Issue #16039: CVE-2013-1752: Change use of readline in imaplib module to limit
- line length. Patch by Emil Lind.
+Documentation
+-------------
-- Issue #19330: the unnecessary wrapper functions have been removed from the
- implementations of the new contextlib.redirect_stdout and
- contextlib.suppress context managers, which also ensures they provide
- reasonable help() output on instances
+- Issue #19548: Update the codecs module documentation to better cover the
+ distinction between text encodings and other codecs, together with other
+ clarifications. Patch by Martin Panter.
-- Issue #19393: Fix symtable.symtable function to not be confused when there are
- functions or classes named "top".
+- Issue #22394: Doc/Makefile now supports ``make venv PYTHON=../python`` to
+ create a venv for generating the documentation, e.g.,
+ ``make html PYTHON=venv/bin/python3``.
-- Issue #18685: Restore re performance to pre-PEP 393 levels.
+- Issue #21514: The documentation of the json module now refers to new JSON RFC
+ 7159 instead of obsoleted RFC 4627.
-- Issue #19339: telnetlib module is now using time.monotonic() when available
- to compute timeout.
+- Issue #21777: The binary sequence methods on bytes and bytearray are now
+ documented explicitly, rather than assuming users will be able to derive
+ the expected behaviour from the behaviour of the corresponding str methods.
-- Issue #19399: fix sporadic test_subprocess failure.
+- Issue #6916: undocument deprecated asynchat.fifo class.
-- Issue #13234: Fix os.listdir to work with extended paths on Windows.
- Patch by Santoso Wijaya.
+- Issue #17386: Expanded functionality of the ``Doc/make.bat`` script to make
+ it much more comparable to ``Doc/Makefile``.
-- Issue #19375: The site module adding a "site-python" directory to sys.path,
- if it exists, is now deprecated.
+- Issue #21312: Update the thread_foobar.h template file to include newer
+ threading APIs. Patch by Jack McCracken.
-- Issue #19379: Lazily import linecache in the warnings module, to make
- startup with warnings faster until a warning gets printed.
+- Issue #21043: Remove the recommendation for specific CA organizations and to
+ mention the ability to load the OS certificates.
-- Issue #19288: Fixed the "in" operator of dbm.gnu databases for string
- argument. Original patch by Arfrever Frehtes Taifersar Arahesis.
+- Issue #20765: Add missing documentation for PurePath.with_name() and
+ PurePath.with_suffix().
-- Issue #19287: Fixed the "in" operator of dbm.ndbm databases for string
- argument. Original patch by Arfrever Frehtes Taifersar Arahesis.
+- Issue #19407: New package installation and distribution guides based on
+ the Python Packaging Authority tools. Existing guides have been retained
+ as legacy links from the distutils docs, as they still contain some
+ required reference material for tool developers that isn't recorded
+ anywhere else.
-- Issue #19327: Fixed the working of regular expressions with too big charset.
+- Issue #19697: Document cases where __main__.__spec__ is None.
-- Issue #17400: New 'is_global' attribute for ipaddress to tell if an address
- is allocated by IANA for global or private networks.
+Tests
+-----
-- Issue #19350: Increasing the test coverage of macurl2path. Patch by Colin
- Williams.
+- Issue #18982: Add tests for CLI of the calendar module.
-- Issue #19365: Optimized the parsing of long replacement string in re.sub*()
- functions.
+- Issue #19548: Added some additional checks to test_codecs to ensure that
+ statements in the updated documentation remain accurate. Patch by Martin
+ Panter.
-- Issue #19352: Fix unittest discovery when a module can be reached
- through several paths (e.g. under Debian/Ubuntu with virtualenv).
+- Issue #22838: All test_re tests now work with unittest test discovery.
-- Issue #15207: Fix mimetypes to read from correct part of Windows registry
- Original patch by Dave Chambers
+- Issue #22173: Update lib2to3 tests to use unittest test discovery.
-- Issue #16595: Add prlimit() to resource module.
+- Issue #16000: Convert test_curses to use unittest.
-- Issue #19324: Expose Linux-specific constants in resource module.
+- Issue #21456: Skip two tests in test_urllib2net.py if _ssl module not
+ present. Patch by Remi Pointel.
-- Load SSL's error strings in hashlib.
+- Issue #20746: Fix test_pdb to run in refleak mode (-R). Patch by Xavier
+ de Gaye.
-- Issue #18527: Upgrade internal copy of zlib to 1.2.8.
+- Issue #22060: test_ctypes has been somewhat cleaned up and simplified; it
+ now uses unittest test discovery to find its tests.
-- Issue #19274: Add a filterfunc parameter to PyZipFile.writepy.
+- Issue #22104: regrtest.py no longer holds a reference to the suite of tests
+ loaded from test modules that don't define test_main().
-- Issue #8964: fix platform._sys_version to handle IronPython 2.6+.
- Patch by Martin Matusiak.
+- Issue #22111: Assorted cleanups in test_imaplib. Patch by Milan Oberkirch.
-- Issue #19413: Restore pre-3.3 reload() semantics of re-finding modules.
+- Issue #22002: Added ``load_package_tests`` function to test.support and used
+ it to implement/augment test discovery in test_asyncio, test_email,
+ test_importlib, test_json, and test_tools.
-- Issue #18958: Improve error message for json.load(s) while passing a string
- that starts with a UTF-8 BOM.
+- Issue #21976: Fix test_ssl to accept LibreSSL version strings. Thanks
+ to William Orr.
-- Issue #19307: Improve error message for json.load(s) while passing objects
- of the wrong type.
+- Issue #21918: Converted test_tools from a module to a package containing
+ separate test files for each tested script.
-- Issue #16038: CVE-2013-1752: ftplib: Limit amount of data read by
- limiting the call to readline(). Original patch by Michał
- Jastrzębski and Giampaolo Rodola.
+- Issue #9554: Use modern unittest features in test_argparse. Initial patch by
+ Denver Coneybeare and Radu Voicilas.
-- Issue #17087: Improved the repr for regular expression match objects.
+- Issue #20155: Changed HTTP method names in failing tests in test_httpservers
+ so that packet filtering software (specifically Windows Base Filtering Engine)
+ does not interfere with the transaction semantics expected by the tests.
-Tests
------
+- Issue #19493: Refactored the ctypes test package to skip tests explicitly
+ rather than silently.
-- Issue #19664: test_userdict's repr test no longer depends on the order
- of dict elements.
+- Issue #18492: All resources are now allowed when tests are not run by
+ regrtest.py.
-- Issue #19440: Clean up test_capi by removing an unnecessary __future__
- import, converting from test_main to unittest.main, and running the
- _testcapi module tests as subTests of a unittest TestCase method.
+- Issue #21634: Fix pystone micro-benchmark: use floor division instead of true
+ division to benchmark integers instead of floating point numbers. Set pystone
+ version to 1.2. Patch written by Lennart Regebro.
-- Issue #19378: the main dis module tests are now run with both stdout
- redirection *and* passing an explicit file parameter
+- Issue #21605: Added tests for Tkinter images.
-- Issue #19378: removed the not-actually-helpful assertInstructionMatches
- and assertBytecodeExactlyMatches helpers from bytecode_helper
+- Issue #21493: Added test for ntpath.expanduser(). Original patch by
+ Claudiu Popa.
-- Issue #18702: All skipped tests now reported as skipped.
+- Issue #19925: Added tests for the spwd module. Original patch by Vajrasky Kok.
-- Issue #19439: interpreter embedding tests are now executed on Windows
- (Patch by Zachary Ware)
+- Issue #21522: Added Tkinter tests for Listbox.itemconfigure(),
+ PanedWindow.paneconfigure(), and Menu.entryconfigure().
-- Issue #19085: Added basic tests for all tkinter widget options.
+- Issue #17756: Fix test_code test when run from the installed location.
-- Issue #19384: Fix test_py_compile for root user, patch by Claudiu Popa.
+- Issue #17752: Fix distutils tests when run from the installed location.
-Documentation
--------------
+- Issue #18604: Consolidated checks for GUI availability. All platforms now
+ at least check whether Tk can be instantiated when the GUI resource is
+ requested.
-- Issue #18326: Clarify that list.sort's arguments are keyword-only. Also,
- attempt to reduce confusion in the glossary by not saying there are
- different "types" of arguments and parameters.
+- Issue #21275: Fix a socket test on KFreeBSD.
-Build
------
+- Issue #21223: Pass test_site/test_startup_imports when some of the extensions
+ are built as builtins.
-- Issue #19358: "make clinic" now runs the Argument Clinic preprocessor
- over all CPython source files.
+- Issue #20635: Added tests for Tk geometry managers.
-- Update SQLite to 3.8.1, xz to 5.0.5, and Tcl/Tk to 8.6.1 on Windows.
+- Add test case for freeze.
-- Issue #16632: Enable DEP and ASLR on Windows.
+- Issue #20743: Fix a reference leak in test_tcl.
-- Issue #17791: Drop PREFIX and EXEC_PREFIX definitions from PC/pyconfig.h
+- Issue #21097: Move test_namespace_pkgs into test_importlib.
-- Add workaround for VS 2010 nmake clean issue. VS 2010 doesn't set up PATH
- for nmake.exe correctly.
+- Issue #21503: Use test_both() consistently in test_importlib.
-- Issue #19550: Implement Windows installer changes of PEP 453 (ensurepip).
+- Issue #20939: Avoid various network test failures due to new
+ redirect of http://www.python.org/ to https://www.python.org:
+ use http://www.example.com instead.
-- Issue #19520: Fix compiler warning in the _sha3 module on 32bit Windows.
+- Issue #20668: asyncio tests no longer rely on tests.txt file.
+ (Patch by Vajrasky Kok)
-- Issue #19356: Avoid using a C variabled named "_self", it's a reserved
- word in some C compilers.
+- Issue #21093: Prevent failures of ctypes test_macholib on OS X if a
+ copy of libz exists in $HOME/lib or /usr/local/lib.
-- Issue #15792: Correct build options on Win64. Patch by Jeremy Kloth.
+- Issue #22770: Prevent some Tk segfaults on OS X when running gui tests.
-- Issue #19373: Apply upstream change to Tk 8.5.15 fixing OS X 10.9
- screen refresh problem for OS X installer build.
+- Issue #23211: Workaround test_logging failure on some OS X 10.6 systems.
-- Issue #19649: On OS X, the same set of file names are now installed
- in bin directories for all configurations: non-framework vs framework,
- and single arch vs universal builds. pythonx.y-32 is now always
- installed for 64-bit/32-bit universal builds. The obsolete and
- undocumented pythonw* symlinks are no longer installed anywhere.
+- Issue #23345: Prevent test_ssl failures with large OpenSSL patch level
+ values (like 0.9.8zc).
-- Issue #19553: PEP 453 - "make install" and "make altinstall" now install or
- upgrade pip by default, using the bundled pip provided by the new ensurepip
- module. A new configure option, --with-ensurepip[=upgrade|install|no], is
- available to override the default ensurepip "--upgrade" option. The option
- can also be set with "make [alt]install ENSUREPIP=[upgrade|install\no]".
+Tools/Demos
+-----------
-- Issue #19551: PEP 453 - the OS X installer now installs pip by default.
+- Issue #22314: pydoc now works when the LINES environment variable is set.
-- Update third-party libraries for OS X installers: xz 5.0.3 -> 5.0.5,
- SQLite 3.7.13 -> 3.8.1
+- Issue #22615: Argument Clinic now supports the "type" argument for the
+ int converter. This permits using the int converter with enums and
+ typedefs.
-- Issue #15663: Revert OS X installer built-in Tcl/Tk support for 3.4.0b1.
- Some third-party projects, such as Matplotlib and PIL/Pillow,
- depended on being able to build with Tcl and Tk frameworks in
- /Library/Frameworks.
+- Issue #20076: The makelocalealias.py script no longer ignores UTF-8 mapping.
-Tools/Demos
------------
+- Issue #20079: The makelocalealias.py script now can parse the SUPPORTED file
+ from glibc sources and supports command line options for source paths.
-- Issue #19730: Argument Clinic now supports all the existing PyArg
- "format units" as legacy converters, as well as two new features:
- "self converters" and the "version" directive.
+- Issue #22201: Command-line interface of the zipfile module now correctly
+ extracts ZIP files with directory entries. Patch by Ryan Wilson.
-- Issue #19552: pyvenv now bootstraps pip into virtual environments by
- default (pass --without-pip to request the old behaviour)
+- Issue #22120: For functions using an unsigned integer return converter,
+ Argument Clinic now generates a cast to that type for the comparison
+ to -1 in the generated code. (This supresses a compilation warning.)
-- Issue #19390: Argument Clinic no longer accepts malformed Python
- and C ids.
+- Issue #18974: Tools/scripts/diff.py now uses argparse instead of optparse.
+- Issue #21906: Make Tools/scripts/md5sum.py work in Python 3.
+ Patch by Zachary Ware.
-What's New in Python 3.4.0 Alpha 4?
-===================================
+- Issue #21629: Fix Argument Clinic's "--converters" feature.
-Release date: 2013-10-20
+- Add support for ``yield from`` to 2to3.
-Core and Builtins
------------------
+- Add support for the PEP 465 matrix multiplication operator to 2to3.
-- Issue #19301: Give classes and functions that are explicitly marked global a
- global qualname.
+- Issue #16047: Fix module exception list and __file__ handling in freeze.
+ Patch by Meador Inge.
-- Issue #19279: UTF-7 decoder no longer produces illegal strings.
+- Issue #11824: Consider ABI tags in freeze. Patch by Meador Inge.
-- Issue #16612: Add "Argument Clinic", a compile-time preprocessor for
- C files to generate argument parsing code. (See PEP 436.)
+- Issue #20535: PYTHONWARNING no longer affects the run_tests.py script.
+ Patch by Arfrever Frehtes Taifersar Arahesis.
-- Issue #18810: Shift stat calls in importlib.machinery.FileFinder such that
- the code is optimistic that if something exists in a directory named exactly
- like the possible package being searched for that it's in actuality a
- directory.
+Windows
+-------
-- Issue #18416: importlib.machinery.PathFinder now treats '' as the cwd and
- importlib.machinery.FileFinder no longer special-cases '' to '.'. This leads
- to modules imported from cwd to now possess an absolute file path for
- __file__ (this does not affect modules specified by path on the CLI but it
- does affect -m/runpy). It also allows FileFinder to be more consistent by not
- having an edge case.
+- Issue #23260: Update Windows installer
-- Issue #4555: All exported C symbols are now prefixed with either
- "Py" or "_Py".
+- The bundled version of Tcl/Tk has been updated to 8.6.3. The most visible
+ result of this change is the addition of new native file dialogs when
+ running on Windows Vista or newer. See Tcl/Tk's TIP 432 for more
+ information. Also, this version of Tcl/Tk includes support for Windows 10.
-- Issue #19219: Speed up marshal.loads(), and make pyc files slightly
- (5% to 10%) smaller.
+- Issue #17896: The Windows build scripts now expect external library sources
+ to be in ``PCbuild\..\externals`` rather than ``PCbuild\..\..``.
-- Issue #19221: Upgrade Unicode database to version 6.3.0.
+- Issue #17717: The Windows build scripts now use a copy of NASM pulled from
+ svn.python.org to build OpenSSL.
-- Issue #16742: The result of the C callback PyOS_ReadlineFunctionPointer must
- now be a string allocated by PyMem_RawMalloc() or PyMem_RawRealloc() (or NULL
- if an error occurred), instead of a string allocated by PyMem_Malloc() or
- PyMem_Realloc().
+- Issue #21907: Improved the batch scripts provided for building Python.
-- Issue #19199: Remove ``PyThreadState.tick_counter`` field
+- Issue #22644: The bundled version of OpenSSL has been updated to 1.0.1j.
-- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at
- least one place so as to avoid regressions.
+- Issue #10747: Use versioned labels in the Windows start menu.
+ Patch by Olive Kilburn.
-- Issue #19087: Improve bytearray allocation in order to allow cheap popping
- of data at the front (slice deletion).
+- Issue #22980: .pyd files with a version and platform tag (for example,
+ ".cp35-win32.pyd") will now be loaded in preference to those without tags.
-- Issue #19014: memoryview.cast() is now allowed on zero-length views.
-- Issue #18690: memoryview is now automatically registered with
- collections.abc.Sequence
+What's New in Python 3.4.0?
+===========================
-- Issue #19078: memoryview now correctly supports the reversed builtin
- (Patch by Claudiu Popa)
+Release date: 2014-03-16
Library
-------
projects / python / commitdiff