- Issue #15604: Update uses of PyObject_IsTrue() to check for and handle
errors correctly. Patch by Serhiy Storchaka.
-- Issue #13119: sys.stdout and sys.stderr are now using "\r\n" newline on
- Windows, as Python 2.
+- Issue #14846: importlib.FileFinder now handles the case where the
+ directory being searched is removed after a previous import attempt
-- Issue #14579: Fix CVE-2012-2135: vulnerability in the utf-16 decoder after
- error handling. Patch by Serhiy Storchaka.
+Library
+-------
-- Issue #15404: Refleak in PyMethodObject repr.
++- Issue #15777: Fix a refleak in _posixsubprocess.
+
-- Issue #15394: An issue in PyModule_Create that caused references to
- be leaked on some error paths has been fixed. Patch by Julia Lawall.
+- Issue ##665194: Update email.utils.localtime to use datetime.astimezone and
+ correctly handle historic changes in UTC offsets.
-- Issue #15368: An issue that caused bytecode generation to be
- non-deterministic when using randomized hashing (-R) has been fixed.
+- Issue #15199: Fix JavaScript's default MIME type to application/javascript.
+ Patch by Bohuslav Kabrda.
-- Issue #15020: The program name used to search for Python's path is now
- "python3" under Unix, not "python".
+- Issue #12643: code.InteractiveConsole now respects sys.excepthook when
+ displaying exceptions (Patch by Aaron Iles)
-- Issue #15033: Fix the exit status bug when modules invoked using -m swith,
- return the proper failure return value (1). Patch contributed by Jeff Knupp.
+- Issue #13579: string.Formatter now understands the 'a' conversion specifier.
-- Issue #12268: File readline, readlines and read() or readall() methods
- no longer lose data when an underlying read system call is interrupted.
- IOError is no longer raised due to a read system call returning EINTR
- from within these methods.
+- Issue #15595: Fix subprocess.Popen(universal_newlines=True)
+ for certain locales (utf-16 and utf-32 family). Patch by Chris Jerdonek.
-- Issue #15142: Fix reference leak when deallocating instances of types
- created using PyType_FromSpec().
+- Issue #15477: In cmath and math modules, add workaround for platforms whose
+ system-supplied log1p function doesn't respect signs of zeros.
-- Issue #10053: Don't close FDs when FileIO.__init__ fails. Loosely based on
- the work by Hirokazu Yamamoto.
+- Issue #15715: importlib.__import__() will silence an ImportError when the use
+ of fromlist leads to a failed import.
-- Issue #14775: Fix a potential quadratic dict build-up due to the garbage
- collector repeatedly trying to untrack dicts.
+- Issue #14669: Fix pickling of connections and sockets on MacOSX
+ by sending/receiving an acknowledgment after file descriptor transfer.
+ TestPicklingConnection has been reenabled for MacOSX.
-- Issue #14494: Fix __future__.py and its documentation to note that
- absolute imports are the default behavior in 3.0 instead of 2.7.
- Patch by Sven Marnach.
+- Issue #11062: Fix adding a message from file to Babyl mailbox.
-- Issue #14761: Fix potential leak on an error case in the import machinery.
+- Issue #15646: Prevent equivalent of a fork bomb when using
+ multiprocessing on Windows without the "if __name__ == '__main__'"
+ idiom.
-- Issue #14699: Fix calling the classmethod descriptor directly.
+- Issue #15678: Fix IDLE menus when started from OS X command line
+ (3.3.0b2 regression).
-- Issue #14433: Prevent msvcrt crash in interactive prompt when stdin
- is closed.
+C API
+-----
-- Issue #11603 (again): Setting __repr__ to __str__ now raises a RuntimeError
- when repr() or str() is called on such an object.
+Extension Modules
+-----------------
-- Issue #14658: Fix binding a special method to a builtin implementation of a
- special method with a different name.
+Tools/Demos
+-----------
-- Issue #14630: Fix a memory access bug for instances of a subclass of int
- with value 0.
+Documentation
+-------------
-- Issue #14612: Fix jumping around with blocks by setting f_lineno.
+- Create a 'Concurrent Execution' section in the docs, and split up the
+ 'Optional Operating System Services' section to use a more user-centric
+ classification scheme (splitting them across the new CE section, IPC and
+ text processing). Operating system limitatons can be reflected with
+ the Sphinx :platform: tag, it doesn't make sense as part of the Table of
+ Contents.
-- Issue #14607: Fix keyword-only arguments which started with ``__``.
+- Issue #4966: Bring the sequence docs up to date for the Py3k transition
+ and the many language enhancements since they were original written
-- Issue #13889: Check and (if necessary) set FPU control word before calling
- any of the dtoa.c string <-> float conversion functions, on MSVC builds of
- Python. This fixes issues when embedding Python in a Delphi app.
+- The "path importer" misnomer has been replaced with Eric Snow's
+ more-awkward-but-at-least-not-wrong suggestion of "path based finder" in
+ the import system reference docs
-- Issue #14474: Save and restore exception state in thread.start_new_thread()
- while writing error message if the thread leaves a unhandled exception.
+- Issue #15640: Document importlib.abc.Finder as deprecated.
-- Issue #13019: Fix potential reference leaks in bytearray.extend(). Patch
- by Suman Saha.
+- Issue #15630: Add an example for "continue" stmt in the tutorial. Patch by
+ Daniel Ellis.
-- Issue #14378: Fix compiling ast.ImportFrom nodes with a "__future__" string as
- the module name that was not interned.
+Tests
+-----
-- Issue #14331: Use significantly less stack space when importing modules by
- allocating path buffers on the heap instead of the stack.
+- Issue #15747: ZFS always returns EOPNOTSUPP when attempting to set the
+ UF_IMMUTABLE flag (via either chflags or lchflags); refactor affected
+ tests in test_posix.py to account for this.
-- Issue #14334: Prevent in a segfault in type.__getattribute__ when it was not
- passed strings.
+- Issue #15285: Refactor the approach for testing connect timeouts using
+ two external hosts that have been configured specifically for this type
+ of test.
-- Issue #1469629: Allow cycles through an object's __dict__ slot to be
- collected. (For example if ``x.__dict__ is x``).
+- Issue #15743: Remove the deprecated method usage in urllib tests. Patch by
+ Jeff Knupp.
-- Issue #14172: Fix reference leak when marshalling a buffer-like object
- (other than a bytes object).
+- Issue #15615: Add some tests for the json module's handling of invalid
+ input data. Patch by Kushal Das.
-- Issue #13521: dict.setdefault() now does only one lookup for the given key,
- making it "atomic" for many purposes. Patch by Filip Gruszczyński.
+Build
+-----
-- Issue #14471: Fix a possible buffer overrun in the winreg module.
+- Issue #15645: Ensure 2to3 grammar pickles are properly installed.
-Library
--------
-- Issue #15777: Fix a refleak in _posixsubprocess.
+What's New in Python 3.3.0 Beta 2?
+==================================
-- Issue #15199: Fix JavaScript's default MIME type to application/javascript.
- Patch by Bohuslav Kabrda.
+*Release date: 12-Aug-2012*
-- Issue #13579: string.Formatter now understands the 'a' conversion specifier.
+Core and Builtins
+-----------------
-- Issue #15595: Fix subprocess.Popen(universal_newlines=True)
- for certain locales (utf-16 and utf-32 family). Patch by Chris Jerdonek.
+- Issue #15568: Fix the return value of "yield from" when StopIteration is
+ raised by a custom iterator.
-- Issue #15477: In cmath and math modules, add workaround for platforms whose
- system-supplied log1p function doesn't respect signs of zeros.
+- Issue #13119: sys.stdout and sys.stderr are now using "\r\n" newline on
+ Windows, as Python 2.
-- Issue #11062: Fix adding a message from file to Babyl mailbox.
+- Issue #15534: Fix the fast-search function for non-ASCII Unicode strings.
-- Issue #15646: Prevent equivalent of a fork bomb when using
- multiprocessing on Windows without the "if __name__ == '__main__'"
- idiom.
+- Issue #15508: Fix the docstring for __import__ to have the proper default
+ value of 0 for 'level' and to not mention negative levels since they are not
+ supported.
-- Issue #15424: Add a __sizeof__ implementation for array objects.
- Patch by Ludwig Hähne.
+- Issue #15425: Eliminated traceback noise from more situations involving
+ importlib.
-- Issue #13052: Fix IDLE crashing when replace string in Search/Replace dialog
- ended with '\'. Patch by Roger Serwy.
+- Issue #14578: Support modules registered in the Windows registry again.
-- Issue #15538: Fix compilation of the getnameinfo() / getaddrinfo()
- emulation code. Patch by Philipp Hagemeister.
+- Issue #15466: Stop using TYPE_INT64 in marshal, to make importlib.h (and other
+ byte code files) equal between 32-bit and 64-bit systems.
-- Issue #9803: Don't close IDLE on saving if breakpoint is open.
- Patch by Roger Serwy.
+- Issue #1692335: Move initial exception args assignment to
+ "BaseException.__new__" to help pickling of naive subclasses.
-- Issue #12288: Consider '0' and '0.0' as valid initialvalue
- for tkinter SimpleDialog.
+- Issue #12834: Fix PyBuffer_ToContiguous() for non-contiguous arrays.
-- Issue #15512: Add a __sizeof__ implementation for parser.
- Patch by Serhiy Storchaka.
+- Issue #15456: Fix code __sizeof__ after #12399 change. Patch by Serhiy
+ Storchaka.
-- Issue #15469: Add a __sizeof__ implementation for deque objects.
- Patch by Serhiy Storchaka.
+- Issue #15404: Refleak in PyMethodObject repr.
-- Issue #15489: Add a __sizeof__ implementation for BytesIO objects.
- Patch by Serhiy Storchaka.
+- Issue #15394: An issue in PyModule_Create that caused references to be leaked
+ on some error paths has been fixed. Patch by Julia Lawall.
-- Issue #15487: Add a __sizeof__ implementation for buffered I/O objects.
- Patch by Serhiy Storchaka.
+- Issue #15368: An issue that caused bytecode generation to be non-deterministic
+ has been fixed.
-- Issue #6056: Make multiprocessing use setblocking(True) on the
- sockets it uses. Original patch by J Derek Wilson.
+- Issue #15202: Consistently use the name "follow_symlinks" for new parameters
+ in os and shutil functions.
-- Issue #15041: update "see also" list in tkinter documentation.
+- Issue #15314: __main__.__loader__ is now set correctly during interpreter
+ startup.
-- Issue #15402: An issue in the struct module that caused sys.getsizeof to
- return incorrect results for struct.Struct instances has been fixed.
- Initial patch by Serhiy Storchaka.
+- Issue #15111: When a module imported using 'from import' has an ImportError
+ inside itself, don't mask that fact behind a generic ImportError for the
+ module itself.
-- Issue #15232: when mangle_from is True, email.Generator now correctly mangles
- lines that start with 'From ' that occur in a MIME preamble or epilogue.
+- Issue #15293: Add GC support to the AST base node type.
-- Issue #13922: argparse no longer incorrectly strips '--'s that appear
- after the first one.
+- Issue #15291: Fix a memory leak where AST nodes where not properly
+ deallocated.
-- Issue #12353: argparse now correctly handles null argument values.
+- Issue #15110: Fix the tracebacks generated by "import xxx" to not show the
+ importlib stack frames.
-- Issues #10017 and #14998: Fix TypeError using pprint on dictionaries with
- user-defined types as keys or other unorderable keys.
+- Issue #15020: The program name used to search for Python's path is now
+ "python3" under Unix, not "python".
-- Issue #14635: telnetlib will use poll() rather than select() when possible
- to avoid failing due to the select() file descriptor limit.
+- Issue #15033: Fix the exit status bug when modules invoked using -m swith,
+ return the proper failure return value (1). Patch contributed by Jeff Knupp.
-- Issue #15180: Clarify posixpath.join() error message when mixing str & bytes
+- Issue #15229: An OSError subclass whose __init__ doesn't call back
+ OSError.__init__ could produce incomplete instances, leading to crashes when
+ calling str() on them.
-- Issue #15230: runpy.run_path now correctly sets __package__ as described
- in the documentation
+- Issue 15307: Virtual environments now use symlinks with framework builds on
+ Mac OS X, like other POSIX builds.
-- Issue #14990: Correctly fail with SyntaxError on invalid encoding
- declaration.
+Library
+-------
-- Issue #15247: FileIO now raises an error when given a file descriptor
- pointing to a directory.
+- Issue #15424: Add a __sizeof__ implementation for array objects. Patch by
+ Ludwig Hähne.
-- Issue #5346: Preserve permissions of mbox, MMDF and Babyl mailbox
- files on flush().
+- Issue #15576: Allow extension modules to act as a package's __init__ module.
-- Issue #10571: Fix the "--sign" option of distutils' upload command.
- Patch by Jakub Wilk.
+- Issue #15502: Have importlib.invalidate_caches() work on sys.meta_path instead
+ of sys.path_importer_cache.
-- Issue #9559: If messages were only added, a new file is no longer
- created and renamed over the old file when flush() is called on an
- mbox, MMDF or Babyl mailbox.
+- Issue #15163: Pydoc shouldn't list __loader__ as module data.
-- Issue #14653: email.utils.mktime_tz() no longer relies on system
- mktime() when timezone offest is supplied.
+- Issue #15471: Do not use mutable objects as defaults for
+ importlib.__import__().
-- Fix GzipFile's handling of filenames given as bytes objects.
+- Issue #15559: To avoid a problematic failure mode when passed to the bytes
+ constructor, objects in the ipaddress module no longer implement __index__
+ (they still implement __int__ as appropriate)
-- Issue #15101: Make pool finalizer avoid joining current thread.
+- Issue #15546: Fix handling of pathological input data in the peek() and
+ read1() methods of the BZ2File, GzipFile and LZMAFile classes.
-- Issue #15036: Mailbox no longer throws an error if a flush is done
- between operations when removing or changing multiple items in mbox,
- MMDF, or Babyl mailboxes.
+- Issue #13052: Fix IDLE crashing when replace string in Search/Replace dialog
+ ended with '\'. Patch by Roger Serwy.
-- Issue #10133: Make multiprocessing deallocate buffer if socket read
- fails. Patch by Hallvard B Furuseth.
+- Issue #12655: Instead of requiring a custom type, os.sched_getaffinity and
+ os.sched_setaffinity now use regular sets of integers to represent the CPUs a
+ process is restricted to.
-- Issue #13854: Make multiprocessing properly handle non-integer
- non-string argument to SystemExit.
+- Issue #15538: Fix compilation of the getnameinfo() / getaddrinfo() emulation
+ code. Patch by Philipp Hagemeister.
-- Issue #12157: Make pool.map() empty iterables correctly. Initial
- patch by mouad.
+- Issue #15519: Properly expose WindowsRegistryFinder in importlib (and use the
+ correct term for it). Original patch by Eric Snow.
-- Issue #14992: os.makedirs(path, exist_ok=True) would raise an OSError
- when the path existed and had the S_ISGID mode bit set when it was
- not explicitly asked for. This is no longer an exception as mkdir
- cannot control if the OS sets that bit for it or not.
+- Issue #15502: Bring the importlib ABCs into line with the current state of the
+ import protocols given PEP 420. Original patch by Eric Snow.
-- Issue #14962: Update text coloring in IDLE shell window after changing
- options. Patch by Roger Serwy.
+- Issue #15499: Launching a webbrowser in Unix used to sleep for a few seconds.
+ Original patch by Anton Barkovsky.
-- Issue #10997: Prevent a duplicate entry in IDLE's "Recent Files" menu.
+- Issue #15463: The faulthandler module truncates strings to 500 characters,
+ instead of 100, to be able to display long file paths.
-- Issue #14443: Tell rpmbuild to use the correct version of Python in
- bdist_rpm. Initial patch by Ross Lagerwall.
+- Issue #6056: Make multiprocessing use setblocking(True) on the sockets it
+ uses. Original patch by J Derek Wilson.
-- Issue #14929: Stop Idle 3.x from closing on Unicode decode errors when
- grepping. Patch by Roger Serwy.
+- Issue #15364: Fix sysconfig.get_config_var('srcdir') to be an absolute path.
-- Issue #12510: Attempting to get invalid tooltip no longer closes Idle.
- Other tooltipss have been corrected or improved and the number of tests
- has been tripled. Original patch by Roger Serwy.
+- Issue #15041: Update "see also" list in tkinter documentation.
-- Issue #10365: File open dialog now works instead of crashing even when
- the parent window is closed before the dialog. Patch by Roger Serwy.
+- Issue #15413: os.times() had disappeared under Windows.
-- Issue #14876: Use user-selected font for highlight configuration.
+- Issue #15402: An issue in the struct module that caused sys.getsizeof to
+ return incorrect results for struct.Struct instances has been fixed. Initial
+ patch by Serhiy Storchaka.
-- Issue #14920: Fix the help(urllib.parse) failure on locale C on terminals.
- Have ascii characters in help.
+- Issue #15232: When mangle_from is True, email.Generator now correctly mangles
+ lines that start with 'From ' that occur in a MIME preamble or epilogue.
-- Issue #14863: Update the documentation of os.fdopen() to reflect the
- fact that it's only a thin wrapper around open() anymore.
+- Issue #15094: Incorrectly placed #endif in _tkinter.c. Patch by Serhiy
+ Storchaka.
-- Issue #14036: Add an additional check to validate that port in urlparse does
- not go in illegal range and returns None.
+- Issue #13922: argparse no longer incorrectly strips '--'s that appear after
+ the first one.
-- Issue #14875: Use float('inf') instead of float('1e66666') in the json module.
+- Issue #12353: argparse now correctly handles null argument values.
-- Issue #14426: Correct the Date format in Expires attribute of Set-Cookie
- Header in Cookie.py.
+- Issue #10017, issue #14998: Fix TypeError using pprint on dictionaries with
+ user-defined types as keys or other unorderable keys.
-- Issue #14721: Send the correct 'Content-length: 0' header when the body is an
- empty string ''. Initial Patch contributed by Arve Knudsen.
+- Issue #15397: inspect.getmodulename() is now based directly on importlib via a
+ new importlib.machinery.all_suffixes() API.
-- Issue #14072: Fix parsing of 'tel' URIs in urlparse by making the check for
- ports stricter.
+- Issue #14635: telnetlib will use poll() rather than select() when possible to
+ avoid failing due to the select() file descriptor limit.
-- Issue #9374: Generic parsing of query and fragment portions of url for any
- scheme. Supported both by RFC3986 and RFC2396.
+- Issue #15180: Clarify posixpath.join() error message when mixing str & bytes.
-- Issue #14798: Fix the functions in pyclbr to raise an ImportError
- when the first part of a dotted name is not a package. Patch by
- Xavier de Gaye.
+- Issue #15343: pkgutil now includes an iter_importer_modules implementation for
+ importlib.machinery.FileFinder (similar to the way it already handled
+ zipimport.zipimporter).
-- Issue #14829: Fix bisect and range() indexing with large indices
- (>= 2 ** 32) under 64-bit Windows.
+- Issue #15314: runpy now sets __main__.__loader__ correctly.
-- Issue #14777: tkinter may return undecoded UTF-8 bytes as a string when
- accessing the Tk clipboard. Modify clipboad_get() to first request type
- UTF8_STRING when no specific type is requested in an X11 windowing
- environment, falling back to the current default type STRING if that fails.
- Original patch by Thomas Kluyver.
+- Issue #15357: The import emulation in pkgutil is now deprecated. pkgutil uses
+ importlib internally rather than the emulation.
-- Issue #12541: Be lenient with quotes around Realm field of HTTP Basic
- Authentation in urllib2.
+- Issue #15233: Python now guarantees that callables registered with the atexit
+ module will be called in a deterministic order.
-- Issue #14662: Prevent shutil failures on OS X when destination does not
- support chflag operations. Patch by Hynek Schlawack.
+- Issue #15238: shutil.copystat now copies Linux "extended attributes".
-- Issue #14157: Fix time.strptime failing without a year on February 29th.
- Patch by Hynek Schlawack.
+- Issue #15230: runpy.run_path now correctly sets __package__ as described in
+ the documentation.
-- Issue #14768: os.path.expanduser('~/a') doesn't works correctly when HOME is '/'.
+- Issue #15315: Support VS 2010 in distutils cygwincompiler.
-- Issue #14741: Fix missing support for Ellipsis ('...') in parser module.
+- Issue #15294: Fix a regression in pkgutil.extend_path()'s handling of nested
+ namespace packages.
-- Issue #14697: Fix missing support for set displays and set comprehensions in
- parser module.
+- Issue #15056: imp.cache_from_source() and source_from_cache() raise
+ NotImplementedError when sys.implementation.cache_tag is set to None.
-- Issue #14701: Fix missing support for 'raise ... from' in parser module.
+- Issue #15256: Grammatical mistake in exception raised by imp.find_module().
-- Issue #13183: Fix pdb skipping frames after hitting a breakpoint and running
- step. Patch by Xavier de Gaye.
+- Issue #5931: wsgiref environ variable SERVER_SOFTWARE will specify an
+ implementation specific term like CPython, Jython instead of generic "Python".
-- Issue #14696: Fix parser module to understand 'nonlocal' declarations.
+- Issue #13248: Remove obsolete argument "max_buffer_size" of BufferedWriter and
+ BufferedRWPair, from the io module.
-- Issue #10941: Fix imaplib.Internaldate2tuple to produce correct result near
- the DST transition. Patch by Joe Peterson.
+- Issue #13248: Remove obsolete argument "version" of argparse.ArgumentParser.
-- Issue #9154: Fix parser module to understand function annotations.
+- Issue #14814: Implement more consistent ordering and sorting behaviour for
+ ipaddress objects.
-- Issue #14664: It is now possible to use @unittest.skip{If,Unless} on a
- test class that doesn't inherit from TestCase (i.e. a mixin).
+- Issue #14814: ipaddress network objects correctly return NotImplemented when
+ compared to arbitrary objects instead of raising TypeError.
-- Issue #14160: TarFile.extractfile() failed to resolve symbolic links when
- the links were not located in an archive subdirectory.
+- Issue #14990: Correctly fail with SyntaxError on invalid encoding declaration.
-- Issue #14638: pydoc now treats non-string __name__ values as if they
- were missing, instead of raising an error.
+- Issue #14814: ipaddress now provides more informative error messages when
+ constructing instances directly (changes permitted during beta due to
+ provisional API status).
-- Issue #13684: Fix httplib tunnel issue of infinite loops for certain sites
- which send EOF without trailing \r\n.
+- Issue #15247: FileIO now raises an error when given a file descriptor pointing
+ to a directory.
-- Issue #14629: Raise SyntaxError in tokenizer.detect_encoding if the
- first two lines have non-UTF-8 characters without an encoding declaration.
+- Issue #15261: Stop os.stat(fd) crashing on Windows when fd not open.
-- Issue #14308: Fix an exception when a "dummy" thread is in the threading
- module's active list after a fork().
+- Issue #15166: Implement imp.get_tag() using sys.implementation.cache_tag.
-- Issue #14538: HTMLParser can now parse correctly start tags that contain
- a bare '/'.
+- Issue #15210: Catch KeyError when importlib.__init__ can't find
+ _frozen_importlib in sys.modules, not ImportError.
-- Issue #14452: SysLogHandler no longer inserts a UTF-8 BOM into the message.
+- Issue #15030: importlib.abc.PyPycLoader now supports the new source size
+ header field in .pyc files.
-- Issue #13496: Fix potential overflow in bisect.bisect algorithm when applied
- to a collection of size > sys.maxsize / 2.
+- Issue #5346: Preserve permissions of mbox, MMDF and Babyl mailbox files on
+ flush().
-- Issue #14399: zipfile now recognizes that the archive has been modified even
- if only the comment is changed. In addition, the TypeError that results from
- trying to set a non-binary value as a comment is now now raised at the time
- the comment is set rather than at the time the zipfile is written.
+- Issue #10571: Fix the "--sign" option of distutils' upload command. Patch by
+ Jakub Wilk.
-- Issue #7978: socketserver now restarts the select() call when EINTR is
- returned. This avoids crashing the server loop when a signal is received.
- Patch by Jerzy Kozera.
+- Issue #9559: If messages were only added, a new file is no longer created and
+ renamed over the old file when flush() is called on an mbox, MMDF or Babyl
+ mailbox.
-- Issue #14496: Fix wrong name in idlelib/tabbedpages.py.
- Patch by Popa Claudiu.
+- Issue 10924: Fixed crypt.mksalt() to use a RNG that is suitable for
+ cryptographic purpose.
-- Issue #14482: Raise a ValueError, not a NameError, when trying to create
- a multiprocessing Client or Listener with an AF_UNIX type address under
- Windows. Patch by Popa Claudiu.
+- Issue #15184: Ensure consistent results of OS X configuration tailoring for
+ universal builds by factoring out common OS X-specific customizations from
+ sysconfig, distutils.sysconfig, distutils.util, and distutils.unixccompiler
+ into a new module _osx_support.
-- Issue #14151: Raise a ValueError, not a NameError, when trying to create
- a multiprocessing Client or Listener with an AF_PIPE type address under
- non-Windows platforms. Patch by Popa Claudiu.
+C API
+-----
-- Issue #13872: socket.detach() now marks the socket closed (as mirrored
- in the socket repr()). Patch by Matt Joiner.
+- Issue #15610: PyImport_ImportModuleEx() now uses a 'level' of 0 instead of -1.
-- Issue #14406: Fix a race condition when using ``concurrent.futures.wait(
- return_when=ALL_COMPLETED)``. Patch by Matt Joiner.
+- Issues #15169, #14599: Strip out the C implementation of
+ imp.source_from_cache() used by PyImport_ExecCodeModuleWithPathnames() and
+ used the Python code instead. Leads to PyImport_ExecCodeModuleObject() to not
+ try to infer the source path from the bytecode path as
+ PyImport_ExecCodeModuleWithPathnames() does.
-- Issue #14409: IDLE now properly executes commands in the Shell window
- when it cannot read the normal config files on startup and
- has to use the built-in default key bindings.
- There was previously a bug in one of the defaults.
+Extension Modules
+-----------------
-- Issue #10340: asyncore - properly handle EINVAL in dispatcher constructor on
- OSX; avoid to call handle_connect in case of a disconnected socket which
- was not meant to connect.
+- Issue #6493: An issue in ctypes on Windows that caused structure bitfields
+ of type ctypes.c_uint32 and width 32 to incorrectly be set has been fixed.
-- Issue #12757: Fix the skipping of doctests when python is run with -OO so
- that it works in unittest's verbose mode as well as non-verbose mode.
-
-- Issue #3573: IDLE hangs when passing invalid command line args
- (directory(ies) instead of file(s)) (Patch by Guilherme Polo)
+- Issue #15194: Update libffi to the 3.0.11 release.
-- Issue #13694: asynchronous connect in asyncore.dispatcher does not set addr
- attribute.
+Tools/Demos
+-----------
-- Issue #11686: Added missing entries to email package __all__ lists
- (mostly the new Bytes classes).
+- Issue #15458: python-config gets a new option --configdir to print the $LIBPL
+ value.
-- Issue #10484: Fix the CGIHTTPServer's PATH_INFO handling problem.
+- Move importlib.test.benchmark to Tools/importbench.
-- Issue #11199: Fix the with urllib which hangs on particular ftp urls.
+- Issue #12605: The gdb hooks for debugging CPython (within Tools/gdb) have been
+ enhanced to show information on more C frames relevant to CPython within the
+ "py-bt" and "py-bt-full" commands:
+ * C frames that are waiting on the GIL
+ * C frames that are garbage-collecting
+ * C frames that are due to the invocation of a PyCFunction
-- Issue #14062: Header objects now correctly respect the 'linesep' setting
- when processed by BytesParser (which smtplib.SMTP.send_message uses).
+Documentation
+-------------
-- Issue #14291: Email now defaults to utf-8 for non-ASCII unicode headers
- instead of raising an error. This fixes a regression relative to 2.7.
+- Issue #15444: Use proper spelling for non-ASCII contributor names. Patch
+ by Serhiy Storchaka.
-- Issue #5219: Prevent event handler cascade in IDLE.
+- Issue #15295: Reorganize and rewrite the documentation on the import system.
-- Issue #14184: Increase the default stack size for secondary threads on
- Mac OS X to avoid interpreter crashes when using threads on 10.7.
+- Issue #15230: Clearly document some of the limitations of the runpy module and
+ nudge readers towards importlib when appropriate.
-- Issue #10543: Fix unittest test discovery with Jython bytecode files.
+- Issue #15053: Copy Python 3.3 import lock change notice to all relevant
+ functions in imp instead of just at the top of the relevant section.
-- Issue #14252: Fix subprocess.Popen.terminate() to not raise an error under
- Windows when the child process has already exited.
+- Issue #15288: Link to the term "loader" in notes in pkgutil about how things
+ won't work as expected in Python 3.3 and mark the requisite functions as
+ "changed" since they will no longer work with modules directly imported by
+ import itself.
-- Issue #14195: An issue that caused weakref.WeakSet instances to incorrectly
- return True for a WeakSet instance 'a' in both 'a < a' and 'a > a' has been
- fixed.
+- Issue #13557: Clarify effect of giving two different namespaces to exec or
+ execfile().
-- Issue #14177: marshal.loads() now raises TypeError when given an unicode
- string. Patch by Guilherme Gonçalves.
+- Issue #15250: Document that filecmp.dircmp compares files shallowly. Patch
+ contributed by Chris Jerdonek.
-- Issue #14159: Fix the len() of weak containers (WeakSet, WeakKeyDictionary,
- WeakValueDictionary) to return a better approximation when some objects
- are dead or dying. Moreover, the implementation is now O(1) rather than
- O(n).
+Tests
+-----
-- Issue #13125: Silence spurious test_lib2to3 output when in non-verbose mode.
- Patch by Mikhail Novikov.
+- Issue #15467: Move helpers for __sizeof__ tests into test_support. Patch by
+ Serhiy Storchaka.
-- Issue #13447: Add a test file to host regression tests for bugs in the
- scripts found in the Tools directory.
+- Issue #15320: Make iterating the list of tests thread-safe when running tests
+ in multiprocess mode. Patch by Chris Jerdonek.
-- Issue #8033: sqlite3: Fix 64-bit integer handling in user functions
- on 32-bit architectures. Initial patch by Philippe Devalkeneer.
+- Issue #15168: Move importlib.test to test.test_importlib.
-Extension Modules
------------------
+- Issue #15091: Reactivate a test on UNIX which was failing thanks to a
+ forgotten importlib.invalidate_caches() call.
-- Issue #6493: An issue in ctypes on Windows that caused structure bitfields
- of type ctypes.c_uint32 and width 32 to incorrectly be set has been fixed.
+- Issue #15230: Adopted a more systematic approach in the runpy tests.
-- Issue #15000: Support the "unique" x32 architecture in _posixsubprocess.c.
+- Issue #15300: Ensure the temporary test working directories are in the same
+ parent folder when running tests in multiprocess mode from a Python build.
+ Patch by Chris Jerdonek.
-- Issue #9041: An issue in ctypes.c_longdouble, ctypes.c_double, and
- ctypes.c_float that caused an incorrect exception to be returned in the
- case of overflow has been fixed.
+- Issue #15284: Skip {send,recv}msg tests in test_socket when IPv6 is not
+ enabled. Patch by Brian Brazil.
-- Issue #14212: The re module didn't retain a reference to buffers it was
- scanning, resulting in segfaults.
+- Issue #15277: Fix a resource leak in support.py when IPv6 is disabled. Patch
+ by Brian Brazil.
-Tests
+Build
-----
-- Issue #15747: ZFS always returns EOPNOTSUPP when attempting to set the
- UF_IMMUTABLE flag (via either chflags or lchflags); refactor affected
- tests in test_posix.py to account for this.
+- Issue #11715: Fix multiarch detection without having Debian development tools
+ (dpkg-dev) installed.
-- Issue #15285: Refactor the approach for testing connect timeouts using
- two external hosts that have been configured specifically for this type
- of test.
+- Issue #15037: Build OS X installers with local copy of ncurses 5.9 libraries
+ to avoid curses.unget_wch bug present in older versions of ncurses such as
+ those shipped with OS X.
-- Issue #15615: Add some tests for the json module's handling of invalid
- input data. Patch by Kushal Das.
+- Issue #15560: Fix building _sqlite3 extension on OS X with an SDK. Also, for
+ OS X installers, ensure consistent sqlite3 behavior and feature availability
+ by building a local copy of libsqlite3 rather than depending on the wide range
+ of versions supplied with various OS X releases.
-- Issue #15496: Add directory removal helpers for tests on Windows.
- Patch by Jeremy Kloth.
+- Issue #8847: Disable COMDAT folding in Windows PGO builds.
-- Issue #15467: Move helpers for __sizeof__ tests into test_support.
- Patch by Serhiy Storchaka.
+- Issue #14018: Fix OS X Tcl/Tk framework checking when using OS X SDKs.
-- Issue #15320: Make iterating the list of tests thread-safe when running
- tests in multiprocess mode. Patch by Chris Jerdonek.
+- Issue #15431: Add _freeze_importlib project to regenerate importlib.h on
+ Windows. Patch by Kristján Valur Jónsson.
-- Issue #15230: Adopted a more systematic approach in the runpy tests
+- Issue #14197: For OS X framework builds, ensure links to the shared library
+ are created with the proper ABI suffix.
-- Issue #15300: Ensure the temporary test working directories are in the same
- parent folder when running tests in multiprocess mode from a Python build.
- Patch by Chris Jerdonek.
+- Issue #14330: For cross builds, don't use host python, use host search paths
+ for host compiler.
-- test_nntplib now tolerates being run from behind NNTP gateways that add
- "X-Antivirus" headers to articles
+- Issue #15235: Allow Berkley DB versions up to 5.3 to build the dbm module.
-- Issue #15043: test_gdb is now skipped entirely if gdb security settings
- block loading of the gdb hooks
+- Issue #15268: Search curses.h in /usr/include/ncursesw.
-- Issue #14026: In test_cmd_line_script, check that sys.argv is populated
- correctly for the various invocation approaches (Patch by Jason Yeo)
-- Issue #14032: Fix incorrect variable name in test_cmd_line_script debugging
- message (Patch by Jason Yeo)
+What's New in Python 3.3.0 Beta 1?
+==================================
-- Issue #14589: Update certificate chain for sha256.tbs-internet.com, fixing
- a test failure in test_ssl.
+*Release date: 27-Jun-2012*
-Build
------
+Core and Builtins
+-----------------
-- Issue #15645: Ensure 2to3 grammar pickles are properly installed.
+- Fix a (most likely) very rare memory leak when calling main() and not being
+ able to decode a command-line argument.
-- Issue #15560: Fix building _sqlite3 extension on OS X with an SDK.
+- Issue #14815: Use Py_ssize_t instead of long for the object hash, to
+ preserve all 64 bits of hash on Win64.
-- Issue #8847: Disable COMDAT folding in Windows PGO builds.
+- Issue #12268: File readline, readlines and read() or readall() methods
+ no longer lose data when an underlying read system call is interrupted.
+ IOError is no longer raised due to a read system call returning EINTR
+ from within these methods.
-- Issue #14197: For OS X framework builds, ensure links to the shared
- library are created with the proper ABI suffix.
+- Issue #11626: Add _SizeT functions to stable ABI.
-- Issue #14472: Update .gitignore. Patch by Matej Cepl.
+- Issue #15146: Add PyType_FromSpecWithBases. Patch by Robin Schreiber.
-- The Windows build now uses OpenSSL 1.0.0j and bzip2 1.0.6.
+- Issue #15142: Fix reference leak when deallocating instances of types
+ created using PyType_FromSpec().
-- Issue #14557: Fix extensions build on HP-UX. Patch by Adi Roiban.
+- Issue #15042: Add PyState_AddModule and PyState_RemoveModule. Add version
+ guard for Py_LIMITED_API additions. Patch by Robin Schreiber.
-- Issue #14437: Fix building the _io module under Cygwin.
+- Issue #10053: Don't close FDs when FileIO.__init__ fails. Loosely based on
+ the work by Hirokazu Yamamoto.
-- Issue #14387: Do not include accu.h from Python.h.
+- Issue #15096: Removed support for ur'' as the raw notation isn't
+ compatible with Python 2.x's raw unicode strings.
-- Issue #14359: Only use O_CLOEXEC in _posixmodule.c if it is defined.
- Based on patch from Hervé Coatanhay.
+- Issue #13783: Generator objects now use the identifier APIs internally
-- Issue #14018: Fix OS X Tcl/Tk framework checking when using OS X SDKs.
+- Issue #14874: Restore charmap decoding speed to pre-PEP 393 levels.
+ Patch by Serhiy Storchaka.
-Documentation
--------------
+- Issue #15026: utf-16 encoding is now significantly faster (up to 10x).
+ Patch by Serhiy Storchaka.
-- Issue #15630: Add an example for "continue" stmt in the tutorial. Patch by
- Daniel Ellis.
+- Issue #11022: open() and io.TextIOWrapper are now calling
+ locale.getpreferredencoding(False) instead of locale.getpreferredencoding()
+ in text mode if the encoding is not specified. Don't change temporary the
+ locale encoding using locale.setlocale(), use the current locale encoding
+ instead of the user preferred encoding.
-- Issue #15444: Use proper spelling for non-ASCII contributor names. Patch
- by Serhiy Storchaka.
+- Issue #14673: Add Eric Snow's sys.implementation implementation.
-- Issue 15482: Properly document the default 'level' value for __import__()
- while warning about using negative values.
+- Issue #15038: Optimize python Locks on Windows.
-- Issue #15230: Clearly document some of the limitations of the runpy
- module and nudge readers towards importlib when appropriate.
+Library
+-------
-- Issue #13557: Clarify effect of giving two different namespaces to exec or
- execfile().
+- Issue #9803: Don't close IDLE on saving if breakpoint is open.
+ Patch by Roger Serwy.
-- Issue #8799: Fix and improve the threading.Condition documentation.
+- Issue #12288: Consider '0' and '0.0' as valid initialvalue
+ for tkinter SimpleDialog.
-- Issue #14943: Correct a default argument value for winreg.OpenKey
- and correctly list the argument names in the function's explanation.
+- Issue #15512: Add a __sizeof__ implementation for parser.
+ Patch by Serhiy Storchaka.
-- Issue #14034: added the argparse tutorial.
+- Issue #15469: Add a __sizeof__ implementation for deque objects.
+ Patch by Serhiy Storchaka.
-- Issue #15250: Document that filecmp.dircmp compares files shallowly. Patch
- contributed by Chris Jerdonek.
+- Issue #15489: Add a __sizeof__ implementation for BytesIO objects.
+ Patch by Serhiy Storchaka.
-Tools/Demos
------------
+- Issue #15487: Add a __sizeof__ implementation for buffered I/O objects.
+ Patch by Serhiy Storchaka.
-- Issue #14695: Fix missing support for starred assignments in
- Tools/parser/unparse.py.
+- Issue #15514: Correct __sizeof__ support for cpu_set.
+ Patch by Serhiy Storchaka.
+- Issue #15187: Bugfix: remove temporary directories test_shutil was leaving
+ behind.
-What's New in Python 3.2.3?
-===========================
+- Issue #15177: Added dir_fd parameter to os.fwalk().
-*Release date: 10-Apr-2012*
+- Issue #15176: Clarified behavior, documentation, and implementation
+ of os.listdir().
-Build
------
+- Issue #15061: Re-implemented hmac.compare_digest() in C to prevent further
+ timing analysis and to support all buffer protocol aware objects as well as
+ ASCII only str instances safely.
-- Issue #14387: Work around a problem building extension modules under Windows
- by undefining ``small`` before use in the Python headers.
+- Issue #15164: Change return value of platform.uname() from a
+ plain tuple to a collections.namedtuple.
+- Support Mageia Linux in the platform module.
-What's New in Python 3.2.3 release candidate 2?
-===============================================
+- Issue #11678: Support Arch linux in the platform module.
-*Release date: 18-Mar-2012*
+- Issue #15118: Change return value of os.uname() and os.times() from
+ plain tuples to immutable iterable objects with named attributes
+ (structseq objects).
-Library
--------
+- Speed up _decimal by another 10-15% by caching the thread local context
+ that was last accessed. In the pi benchmark (64-bit platform, prec=9),
+ _decimal is now only 1.5x slower than float.
-- Issue #6884: Fix long-standing bugs with MANIFEST.in parsing in distutils
- on Windows.
+- Remove the packaging module, which is not ready for prime time.
-Extension Modules
------------------
+- Issue #15154: Add "dir_fd" parameter to os.rmdir, remove "rmdir"
+ parameter from os.remove / os.unlink.
-- Issue #14234: CVE-2012-0876: Randomize hashes of xml attributes in the hash
- table internal to the pyexpat module's copy of the expat library to avoid a
- denial of service due to hash collisions. Patch by David Malcolm with some
- modifications by the expat project.
+- Issue #4489: Add a shutil.rmtree that isn't susceptible to symlink attacks.
+ It is used automatically on platforms supporting the necessary os.openat()
+ and os.unlinkat() functions. Main code by Martin von Löwis.
+- Issue #15156: HTMLParser now uses the new "html.entities.html5" dictionary.
-What's New in Python 3.2.3 release candidate 1?
-===============================================
+- Issue #11113: add a new "html5" dictionary containing the named character
+ references defined by the HTML5 standard and the equivalent Unicode
+ character(s) to the html.entities module.
-*Release date: 24-Feb-2012*
+- Issue #15114: the strict mode of HTMLParser and the HTMLParseError exception
+ are deprecated now that the parser is able to parse invalid markup.
-Core and Builtins
------------------
+- Issue #3665: \u and \U escapes are now supported in unicode regular
+ expressions. Patch by Serhiy Storchaka.
-- Issue #13703: oCERT-2011-003: add -R command-line option and PYTHONHASHSEED
- environment variable, to provide an opt-in way to protect against denial of
- service attacks due to hash collisions within the dict and set types. Patch
- by David Malcolm, based on work by Victor Stinner.
+- Issue #15153: Added inspect.getgeneratorlocals to simplify white box
+ testing of generator state updates
-- Issue #14084: Fix a file descriptor leak when importing a module with a
- bad encoding.
+- Issue #13062: Added inspect.getclosurevars to simplify testing stateful
+ closures
-- Issue #13020: Fix a reference leak when allocating a structsequence object
- fails. Patch by Suman Saha.
+- Issue #11024: Fixes and additional tests for Time2Internaldate.
-- Issue #13908: Ready types returned from PyType_FromSpec.
+- Issue #14626: Large refactoring of functions / parameters in the os module.
+ Many functions now support "dir_fd" and "follow_symlinks" parameters;
+ some also support accepting an open file descriptor in place of of a path
+ string. Added os.support_* collections as LBYL helpers. Removed many
+ functions only previously seen in 3.3 alpha releases (often starting with
+ "f" or "l", or ending with "at"). Originally suggested by Serhiy Storchaka;
+ implemented by Larry Hastings.
-- Issue #11235: Fix OverflowError when trying to import a source file whose
- modification time doesn't fit in a 32-bit timestamp.
+- Issue #15008: Implement PEP 362 "Signature Objects".
+ Patch by Yury Selivanov.
-- Fix the builtin module initialization code to store the init function for
- future reinitialization.
+- Issue: #15138: base64.urlsafe_{en,de}code() are now 3-4x faster.
-- Issue #8052: The posix subprocess module would take a long time closing
- all possible file descriptors in the child process rather than just open
- file descriptors. It now closes only the open fds if possible for the
- default close_fds=True behavior.
+- Issue #444582: Add shutil.which, for finding programs on the system path.
+ Original patch by Erik Demaine, with later iterations by Jan Killian
+ and Brian Curtin.
-- Issue #13629: Renumber the tokens in token.h so that they match the indexes
- into _PyParser_TokenNames.
+- Issue #14837: SSL errors now have ``library`` and ``reason`` attributes
+ describing precisely what happened and in which OpenSSL submodule. The
+ str() of a SSLError is also enhanced accordingly.
-- Fix the fix for issue #12149: it was incorrect, although it had the side
- effect of appearing to resolve the issue. Thanks to Mark Shannon for
- noticing.
+- Issue #9527: datetime.astimezone() method will now supply a class
+ timezone instance corresponding to the system local timezone when
+ called with no arguments.
-- Issue #13505: Pickle bytes objects in a way that is compatible with
- Python 2 when using protocols <= 2.
+- Issue #14653: email.utils.mktime_tz() no longer relies on system
+ mktime() when timezone offest is supplied.
-- Issue #11147: Fix an unused argument in _Py_ANNOTATE_MEMORY_ORDER. (Fix
- given by Campbell Barton).
+- Issue #14684: zlib.compressobj() and zlib.decompressobj() now support the use
+ of predefined compression dictionaries. Original patch by Sam Rushing.
-- Issue #7111: Python can now be run without a stdin, stdout or stderr
- stream. It was already the case with Python 2. However, the corresponding
- sys module entries are now set to None (instead of an unusable file object).
+- Fix GzipFile's handling of filenames given as bytes objects.
-- Issue #13436: Fix a bogus error message when an AST object was passed
- an invalid integer value.
+- Issue #14772: Return destination values from some shutil functions.
-- Issue #13338: Handle all enumerations in _Py_ANNOTATE_MEMORY_ORDER
- to allow compiling extension modules with -Wswitch-enum on gcc.
- Initial patch by Floris Bruynooghe.
+- Issue #15064: Implement context manager protocol for multiprocessing types
-- Issue #13333: The UTF-7 decoder now accepts lone surrogates (the encoder
- already accepts them).
+- Issue #15101: Make pool finalizer avoid joining current thread.
-- Issue #13342: input() used to ignore sys.stdin's and sys.stdout's unicode
- error handler in interactive mode (when calling into PyOS_Readline()).
+- Issue #14657: The frozen instance of importlib used for bootstrap is now
+ also the module imported as importlib._bootstrap.
-- Issue #13343: Fix a SystemError when a lambda expression uses a global
- variable in the default value of a keyword-only argument:
- (lambda *, arg=GLOBAL_NAME: None)
+- Issue #14055: Add __sizeof__ support to _elementtree.
-- Issue #10519: Avoid unnecessary recursive function calls in
- setobject.c.
+- Issue #15054: A bug in tokenize.tokenize that caused string literals
+ with 'b' prefixes to be incorrectly tokenized has been fixed.
+ Patch by Serhiy Storchaka.
-- Issue #10363: Deallocate global locks in Py_Finalize().
+- Issue #15006: Allow equality comparison between naive and aware
+ time or datetime objects.
-- Issue #13018: Fix reference leaks in error paths in dictobject.c.
- Patch by Suman Saha.
+- Issue #14982: Document that pkgutil's iteration functions require the
+ non-standard iter_modules() method to be defined by an importer (something
+ the importlib importers do not define).
-- Issue #1294232: In a few cases involving metaclass inheritance, the
- interpreter would sometimes invoke the wrong metaclass when building a new
- class object. These cases now behave correctly. Patch by Daniel Urban.
+- Issue #15036: Mailbox no longer throws an error if a flush is done
+ between operations when removing or changing multiple items in mbox,
+ MMDF, or Babyl mailboxes.
-- Issue #12604: VTRACE macro expanded to no-op in _sre.c to avoid compiler
- warnings. Patch by Josh Triplett and Petri Lehtinen.
+- Issue #14059: Implement multiprocessing.Barrier.
-- Issue #13188: When called without an explicit traceback argument,
- generator.throw() now gets the traceback from the passed exception's
- ``__traceback__`` attribute. Patch by Petri Lehtinen.
+- Issue #15061: The inappropriately named hmac.secure_compare has been
+ renamed to hmac.compare_digest, restricted to operating on bytes inputs
+ only and had its documentation updated to more accurately reflect both its
+ intent and its limitations
-- Issue #7833: Extension modules built using distutils on Windows will no
- longer include a "manifest" to prevent them failing at import time in some
- embedded situations.
+- Issue #13841: Make child processes exit using sys.exit() on Windows.
-- Issue #13063: the Windows error ERROR_NO_DATA (numbered 232 and described
- as "The pipe is being closed") is now mapped to POSIX errno EPIPE
- (previously EINVAL).
+- Issue #14936: curses_panel was converted to PEP 3121 and PEP 384 API.
+ Patch by Robin Schreiber.
-- Issue #12911: Fix memory consumption when calculating the repr() of huge
- tuples or lists.
+- Issue #1667546: On platforms supporting tm_zone and tm_gmtoff fields
+ in struct tm, time.struct_time objects returned by time.gmtime(),
+ time.localtime() and time.strptime() functions now have tm_zone and
+ tm_gmtoff attributes. Original patch by Paul Boddie.
-- Issue #7732: Don't open a directory as a file anymore while importing a
- module. Ignore the direcotry if its name matchs the module name (e.g.
- "__init__.py") and raise a ImportError instead.
+- Rename adjusted attribute to adjustable in time.get_clock_info() result.
-- Issue #13021: Missing decref on an error path. Thanks to Suman Saha for
- finding the bug and providing a patch.
+- Issue #3518: Remove references to non-existent BaseManager.from_address()
+ method.
-- Issue #12973: Fix overflow checks that relied on undefined behaviour in
- list_repeat (listobject.c) and islice_next (itertoolsmodule.c). These bugs
- caused test failures with recent versions of Clang.
+- Issue #13857: Added textwrap.indent() function (initial patch by Ezra
+ Berch)
-- Issue #12802: the Windows error ERROR_DIRECTORY (numbered 267) is now
- mapped to POSIX errno ENOTDIR (previously EINVAL).
+- Issue #2736: Added datetime.timestamp() method.
-- Issue #9200: The str.is* methods now work with strings that contain non-BMP
- characters even in narrow Unicode builds.
+- Issue #13854: Make multiprocessing properly handle non-integer
+ non-string argument to SystemExit.
-- Issue #12791: Break reference cycles early when a generator exits with
- an exception.
+- Issue #12157: Make pool.map() empty iterables correctly. Initial
+ patch by mouad.
-- Issue #12266: Fix str.capitalize() to correctly uppercase/lowercase
- titlecased and cased non-letter characters.
+- Issue #11823: disassembly now shows argument counts on calls with keyword args.
-Library
--------
+- Issue #14711: os.stat_float_times() has been deprecated.
-- HTMLParser is now able to handle slashes in the start tag.
+- LZMAFile now accepts the modes "rb"/"wb"/"ab" as synonyms of "r"/"w"/"a".
-- Issue #14001: CVE-2012-0845: xmlrpc: Fix an endless loop in
- SimpleXMLRPCServer upon malformed POST request.
+- The bz2 and lzma modules now each contain an open() function, allowing
+ compressed files to readily be opened in text mode as well as binary mode.
-- Issue #2489: pty.spawn could consume 100% cpu when it encountered an EOF.
+- BZ2File.__init__() and LZMAFile.__init__() now accept a file object as their
+ first argument, rather than requiring a separate "fileobj" argument.
-- Issue #13014: Fix a possible reference leak in SSLSocket.getpeercert().
+- gzip.open() now accepts file objects as well as filenames.
-- Issue #13015: Fix a possible reference leak in defaultdict.__repr__.
- Patch by Suman Saha.
+- Issue #14992: os.makedirs(path, exist_ok=True) would raise an OSError
+ when the path existed and had the S_ISGID mode bit set when it was
+ not explicitly asked for. This is no longer an exception as mkdir
+ cannot control if the OS sets that bit for it or not.
-- Issue #1326113: distutils' build_ext command --libraries option now
- correctly parses multiple values separated by whitespace or commas.
+- Issue #14989: Make the CGI enable option to http.server available via command
+ line.
-- Issue #10287: nntplib now queries the server's CAPABILITIES first before
- sending MODE READER, and only sends it if not already in READER mode.
- Patch by Hynek Schlawack.
+- Issue #14987: Add a missing import statement to inspect.
-- Issue #13979: A bug in ctypes.util.find_library that caused
- the wrong library name to be returned has been fixed.
+- Issue #1079: email.header.decode_header now correctly parses all the examples
+ in RFC2047. There is a necessary visible behavior change: the leading and/or
+ trailing whitespace on ASCII parts is now preserved.
-- Issue #13993: HTMLParser is now able to handle broken end tags when
- strict=False.
+- Issue #14969: Better handling of exception chaining in contextlib.ExitStack
+
+- Issue #14962: Update text coloring in IDLE shell window after changing
+ options. Patch by Roger Serwy.
+
+- Issue #14963: Convert contextlib.ExitStack.__exit__ to use an iterative
+ algorithm (Patch by Alon Horev)
+
+- Issue #14785: Add sys._debugmallocstats() to help debug low-level memory
+ allocation issues
+
+- Issue #14443: Ensure that .py files are byte-compiled with the correct Python
+ executable within bdist_rpm even on older versions of RPM
+
+C-API
+-----
+
+- Issue #13783: Inadvertent additions to the public C API in the PEP 380
+ implementation have either been removed or marked as private interfaces.
+
+Extension Modules
+-----------------
+
+- Issue #15000: Support the "unique" x32 architecture in _posixsubprocess.c.
+
+Documentation
+-------------
+
+- Issue #15081: Document PyState_FindModule.
+ Patch by Robin Schreiber.
+
+- Issue #14814: Added first draft of ipaddress module API reference
+
+Tests
+-----
+
+- Issue #14769: test_capi now has SkipitemTest, which cleverly checks
+ for "parity" between PyArg_ParseTuple() and the Python/getargs.c static
+ function skipitem() for all possible "format units".
+
+- test_nntplib now tolerates being run from behind NNTP gateways that add
+ "X-Antivirus" headers to articles
+
+- Issue #15043: test_gdb is now skipped entirely if gdb security settings
+ block loading of the gdb hooks
+
+- Issue #14963: Add test cases for exception handling behaviour
+ in contextlib.ExitStack (Initial patch by Alon Horev)
+
+Build
+-----
+
+- Issue #13590: Improve support for OS X Xcode 4:
+ * Try to avoid building Python or extension modules with problematic
+ llvm-gcc compiler.
+ * Since Xcode 4 removes ppc support, extension module builds now
+ check for ppc compiler support and automatically remove ppc and
+ ppc64 archs when not available.
+ * Since Xcode 4 no longer install SDKs in default locations,
+ extension module builds now revert to using installed headers
+ and libs if the SDK used to build the interpreter is not
+ available.
+ * Update ./configure to use better defaults for universal builds;
+ in particular, --enable-universalsdk=yes uses the Xcode default
+ SDK and --with-universal-archs now defaults to "intel" if ppc
+ not available.
+
+- Issue #14225: Fix Unicode support for curses (#12567) on OS X
+
+- Issue #14928: Fix importlib bootstrap issues by using a custom executable
+ (Modules/_freeze_importlib) to build Python/importlib.h.
+
+
+What's New in Python 3.3.0 Alpha 4?
+===================================
+
+*Release date: 31-May-2012*
+
+Core and Builtins
+-----------------
+
+- Issue #14835: Make plistlib output empty arrays & dicts like OS X.
+ Patch by Sidney San Martín.
+
+- Issue #14744: Use the new _PyUnicodeWriter internal API to speed up
+ str%args and str.format(args).
+
+- Issue #14930: Make memoryview objects weakrefable.
+
+- Issue #14775: Fix a potential quadratic dict build-up due to the garbage
+ collector repeatedly trying to untrack dicts.
+
+- Issue #14857: fix regression in references to PEP 3135 implicit __class__
+ closure variable (Reopens issue #12370)
+
+- Issue #14712 (PEP 405): Virtual environments. Implemented by Vinay Sajip.
+
+- Issue #14660 (PEP 420): Namespace packages. Implemented by Eric Smith.
+
+- Issue #14494: Fix __future__.py and its documentation to note that
+ absolute imports are the default behavior in 3.0 instead of 2.7.
+ Patch by Sven Marnach.
+
+- Issue #9260: A finer-grained import lock. Most of the import sequence
+ now uses per-module locks rather than the global import lock, eliminating
+ well-known issues with threads and imports.
+
+- Issue #14624: UTF-16 decoding is now 3x to 4x faster on various inputs.
+ Patch by Serhiy Storchaka.
+
+- asdl_seq and asdl_int_seq are now Py_ssize_t sized.
+
+- Issue #14133 (PEP 415): Implement suppression of __context__ display with an
+ attribute on BaseException. This replaces the original mechanism of PEP 409.
+
+- Issue #14417: Mutating a dict during lookup now restarts the lookup instead
+ of raising a RuntimeError (undoes issue #14205).
+
+- Issue #14738: Speed-up UTF-8 decoding on non-ASCII data. Patch by Serhiy
+ Storchaka.
+
+- Issue #14700: Fix two broken and undefined-behaviour-inducing overflow checks
+ in old-style string formatting.
+
+- Issue #14705: The PyArg_Parse() family of functions now support the 'p' format
+ unit, which accepts a "boolean predicate" argument. It converts any Python
+ value into an integer--0 if it is "false", and 1 otherwise.
+
+Library
+-------
+
+- Issue #14690: Use monotonic clock instead of system clock in the sched,
+ subprocess and trace modules.
+
+- Issue #14958: Change IDLE systax highlighting to recognize all string and
+ byte literals supported in Python 3.3.
+
+- Issue #10997: Prevent a duplicate entry in IDLE's "Recent Files" menu.
+
+- Issue #14443: Tell rpmbuild to use the correct version of Python in
+ bdist_rpm. Initial patch by Ross Lagerwall.
+
+- Issue #14929: Stop Idle 3.x from closing on Unicode decode errors when
+ grepping. Patch by Roger Serwy.
+
+- Issue #12515: email now registers a defect if it gets to EOF while parsing
+ a MIME part without seeing the closing MIME boundary.
+
+- Issue #12510: Attempting to get invalid tooltip no longer closes Idle.
+ Other tooltipss have been corrected or improved and the number of tests
+ has been tripled. Original patch by Roger Serwy.
+
+- Issue #1672568: email now always decodes base64 payloads, adding padding and
+ ignoring non-base64-alphabet characters if needed, and registering defects
+ for any such problems.
+
+- Issue #14925: email now registers a defect when the parser decides that there
+ is a missing header/body separator line. MalformedHeaderDefect, which the
+ existing code would never actually generate, is deprecated.
+
+- Issue #10365: File open dialog now works instead of crashing even when
+ the parent window is closed before the dialog. Patch by Roger Serwy.
+
+- Issue #8739: Updated smtpd to support RFC 5321, and added support for the
+ RFC 1870 SIZE extension.
+
+- Issue #665194: Added a localtime function to email.utils to provide an
+ aware local datetime for use in setting Date headers.
+
+- Issue #12586: Added new provisional policies that implement convenient
+ unicode support for email headers. See What's New for details.
+
+- Issue #14731: Refactored email Policy framework to support full backward
+ compatibility with Python 3.2 by default yet allow for the introduction of
+ new features through new policies. Note that Policy.must_be_7bit is renamed
+ to cte_type.
+
+- Issue #14876: Use user-selected font for highlight configuration.
+
+- Issue #14920: Fix the help(urllib.parse) failure on locale C on terminals.
+ Have ascii characters in help.
+
+- Issue #14548: Make multiprocessing finalizers check pid before
+ running to cope with possibility of gc running just after fork.
+
+- Issue #14863: Update the documentation of os.fdopen() to reflect the
+ fact that it's only a thin wrapper around open() anymore.
+
+- Issue #14036: Add an additional check to validate that port in urlparse does
+ not go in illegal range and returns None.
+
+- Issue #14862: Add missing names to os.__all__
+
+- Issue #14875: Use float('inf') instead of float('1e66666') in the json module.
+
+- Issue #13585: Added contextlib.ExitStack
+
+- PEP 3144, Issue #14814: Added the ipaddress module
+
+- Issue #14426: Correct the Date format in Expires attribute of Set-Cookie
+ Header in Cookie.py.
+
+- Issue #14588: The types module now provide new_class() and prepare_class()
+ functions to support PEP 3115 compliant dynamic class creation. Patch by
+ Daniel Urban and Nick Coghlan.
+
+- Issue #13152: Allow to specify a custom tabsize for expanding tabs in
+ textwrap. Patch by John Feuerstein.
+
+- Issue #14721: Send the correct 'Content-length: 0' header when the body is an
+ empty string ''. Initial Patch contributed by Arve Knudsen.
+
+- Issue #14072: Fix parsing of 'tel' URIs in urlparse by making the check for
+ ports stricter.
+
+- Issue #9374: Generic parsing of query and fragment portions of url for any
+ scheme. Supported both by RFC3986 and RFC2396.
+
+- Issue #14798: Fix the functions in pyclbr to raise an ImportError
+ when the first part of a dotted name is not a package. Patch by
+ Xavier de Gaye.
+
+- Issue #12098: multiprocessing on Windows now starts child processes
+ using the same sys.flags as the current process. Initial patch by
+ Sergey Mezentsev.
+
+- Issue #13031: Small speed-up for tarfile when unzipping tarfiles.
+ Patch by Justin Peel.
+
+- Issue #14780: urllib.request.urlopen() now has a ``cadefault`` argument
+ to use the default certificate store. Initial patch by James Oakley.
+
+- Issue #14829: Fix bisect and range() indexing with large indices
+ (>= 2 ** 32) under 64-bit Windows.
+
+- Issue #14732: The _csv module now uses PEP 3121 module initialization.
+ Patch by Robin Schreiber.
+
+- Issue #14809: Add HTTP status codes introduced by RFC 6585 to http.server
+ and http.client. Patch by EungJun Yi.
+
+- Issue #14777: tkinter may return undecoded UTF-8 bytes as a string when
+ accessing the Tk clipboard. Modify clipboad_get() to first request type
+ UTF8_STRING when no specific type is requested in an X11 windowing
+ environment, falling back to the current default type STRING if that fails.
+ Original patch by Thomas Kluyver.
+
+- Issue #14773: Fix os.fwalk() failing on dangling symlinks.
+
+- Issue #12541: Be lenient with quotes around Realm field of HTTP Basic
+ Authentation in urllib2.
+
+- Issue #14807: move undocumented tarfile.filemode() to stat.filemode() and add
+ doc entry. Add tarfile.filemode alias with deprecation warning.
+
+- Issue #13815: TarFile.extractfile() now returns io.BufferedReader objects.
+
+- Issue #14532: Add a secure_compare() helper to the hmac module, to mitigate
+ timing attacks. Patch by Jon Oberheide.
+
+- Add importlib.util.resolve_name().
+
+- Issue #14366: Support lzma compression in zip files.
+ Patch by Serhiy Storchaka.
+
+- Issue #13959: Introduce importlib.find_loader() and document
+ imp.find_module/load_module as deprecated.
+
+- Issue #14082: shutil.copy2() now copies extended attributes, if possible.
+ Patch by Hynek Schlawack.
+
+- Issue #13959: Make importlib.abc.FileLoader.load_module()/get_filename() and
+ importlib.machinery.ExtensionFileLoader.load_module() have their single
+ argument be optional. Allows for the replacement (and thus deprecation) of
+ imp.load_source()/load_package()/load_compiled().
+
+- Issue #13959: imp.get_suffixes() has been deprecated in favour of the new
+ attributes on importlib.machinery: SOURCE_SUFFIXES, DEBUG_BYTECODE_SUFFIXES,
+ OPTIMIZED_BYTECODE_SUFFIXES, BYTECODE_SUFFIXES, and EXTENSION_SUFFIXES. This
+ led to an indirect deprecation of inspect.getmoduleinfo().
+
+- Issue #14662: Prevent shutil failures on OS X when destination does not
+ support chflag operations. Patch by Hynek Schlawack.
+
+- Issue #14157: Fix time.strptime failing without a year on February 29th.
+ Patch by Hynek Schlawack.
+
+- Issue #14753: Make multiprocessing's handling of negative timeouts
+ the same as it was in Python 3.2.
+
+- Issue #14583: Fix importlib bug when a package's __init__.py would first
+ import one of its modules then raise an error.
+
+- Issue #14741: Fix missing support for Ellipsis ('...') in parser module.
+
+- Issue #14697: Fix missing support for set displays and set comprehensions in
+ parser module.
+
+- Issue #14701: Fix missing support for 'raise ... from' in parser module.
+
+- Add support for timeouts to the acquire() methods of
+ multiprocessing's lock/semaphore/condition proxies.
+
+- Issue #13989: Add support for text mode to gzip.open().
+
+- Issue #14127: The os.stat() result object now provides three additional
+ fields: st_ctime_ns, st_mtime_ns, and st_atime_ns, providing those times as an
+ integer with nanosecond resolution. The functions os.utime(), os.lutimes(),
+ and os.futimes() now accept a new parameter, ns, which accepts mtime and atime
+ as integers with nanosecond resolution.
+
+- Issue #14127 and #10148: shutil.copystat now preserves exact mtime and atime
+ on filesystems providing nanosecond resolution.
+
+Tools/Demos
+-----------
+
+- Issue #14695: Bring Tools/parser/unparse.py support up to date with
+ the Python 3.3 Grammar.
+
+Build
+-----
+
+- Issue #14472: Update .gitignore. Patch by Matej Cepl.
+
+- Upgrade Windows library versions: bzip 1.0.6, OpenSSL 1.0.1c.
+
+- Issue #14693: Under non-Windows platforms, hashlib's fallback modules are
+ always compiled, even if OpenSSL is present at build time.
+
+- Issue #13210: Windows build now uses VS2010, ported from VS2008.
+
+Documentation
+-------------
+
+- Issue #14588: The language reference now accurately documents the Python 3
+ class definition process. Patch by Nick Coghlan.
+
+- Issue #14943: Correct a default argument value for winreg.OpenKey
+ and correctly list the argument names in the function's explanation.
+
+
+What's New in Python 3.3.0 Alpha 3?
+===================================
+
+*Release date: 01-May-2012*
+
+Core and Builtins
+-----------------
+
+- Issue #14699: Fix calling the classmethod descriptor directly.
+
+- Issue #14433: Prevent msvcrt crash in interactive prompt when stdin is closed.
+
+- Issue #14521: Make result of float('nan') and float('-nan') more consistent
+ across platforms.
+
+- Issue #14646: __import__() sets __loader__ if the loader did not.
+
+- Issue #14605: No longer have implicit entries in sys.meta_path. If
+ sys.meta_path is found to be empty, raise ImportWarning.
+
+- Issue #14605: No longer have implicit entries in sys.path_hooks. If
+ sys.path_hooks is found to be empty, a warning will be raised. None is now
+ inserted into sys.path_importer_cache if no finder was discovered. This also
+ means imp.NullImporter is no longer implicitly used.
+
+- Issue #13903: Implement PEP 412. Individual dictionary instances can now share
+ their keys with other dictionaries. Classes take advantage of this to share
+ their instance dictionary keys for improved memory and performance.
+
+- Issue #11603 (again): Setting __repr__ to __str__ now raises a RuntimeError
+ when repr() or str() is called on such an object.
+
+- Issue #14658: Fix binding a special method to a builtin implementation of a
+ special method with a different name.
+
+- Issue #14630: Fix a memory access bug for instances of a subclass of int
+ with value 0.
+
+- Issue #14339: Speed improvements to bin, oct and hex functions. Patch by
+ Serhiy Storchaka.
+
+- Issue #14098: New functions PyErr_GetExcInfo and PyErr_SetExcInfo.
+ Patch by Stefan Behnel.
+
+- Issue #14385: It is now possible to use a custom type for the __builtins__
+ namespace, instead of a dict. It can be used for sandboxing for example.
+ Raise also a NameError instead of ImportError if __build_class__ name if not
+ found in __builtins__.
+
+- Issue #12599: Be more strict in accepting None compared to a false-like
+ object for importlib.util.module_for_loader and
+ importlib.machinery.PathFinder.
+
+- Issue #14612: Fix jumping around with blocks by setting f_lineno.
+
+- Issue #14592: Attempting a relative import w/o __package__ or __name__ set in
+ globals raises a KeyError.
+
+- Issue #14607: Fix keyword-only arguments which started with ``__``.
+
+- Issue #10854: The ImportError raised when an extension module on Windows
+ fails to import now uses the new path and name attributes from
+ Issue #1559549.
+
+- Issue #13889: Check and (if necessary) set FPU control word before calling
+ any of the dtoa.c string <-> float conversion functions, on MSVC builds of
+ Python. This fixes issues when embedding Python in a Delphi app.
+
+- __import__() now matches PEP 328 and documentation by defaulting 'index' to 0
+ instead of -1 and removing support for negative values.
+
+- Issue #2377: Make importlib the implementation of __import__().
+
+- Issue #1559549: ImportError now has 'name' and 'path' attributes that are set
+ using keyword arguments to its constructor. They are currently not set by
+ import as they are meant for use by importlib.
+
+- Issue #14474: Save and restore exception state in thread.start_new_thread()
+ while writing error message if the thread leaves a unhandled exception.
+
+- Issue #13019: Fix potential reference leaks in bytearray.extend(). Patch
+ by Suman Saha.
+
+Library
+-------
+
+- Issue #14768: os.path.expanduser('~/a') doesn't works correctly when HOME is '/'.
+
+- Issue #14371: Support bzip2 in zipfile module. Patch by Serhiy Storchaka.
+
+- Issue #13183: Fix pdb skipping frames after hitting a breakpoint and running
+ step. Patch by Xavier de Gaye.
+
+- Issue #14696: Fix parser module to understand 'nonlocal' declarations.
+
+- Issue #10941: Fix imaplib.Internaldate2tuple to produce correct result near
+ the DST transition. Patch by Joe Peterson.
+
+- Issue #9154: Fix parser module to understand function annotations.
+
+- Issue #6085: In http.server.py SimpleHTTPServer.address_string returns the
+ client ip address instead client hostname. Patch by Charles-François Natali.
+
+- Issue #14309: Deprecate time.clock(), use time.perf_counter() or
+ time.process_time() instead.
+
+- Issue #14428: Implement the PEP 418. Add time.get_clock_info(),
+ time.perf_counter() and time.process_time() functions, and rename
+ time.steady() to time.monotonic().
+
+- Issue #14646: importlib.util.module_for_loader() now sets __loader__ and
+ __package__ (when possible).
+
+- Issue #14664: It is now possible to use @unittest.skip{If,Unless} on a
+ test class that doesn't inherit from TestCase (i.e. a mixin).
+
+- Issue #4892: multiprocessing Connections can now be transferred over
+ multiprocessing Connections. Patch by Richard Oudkerk (sbt).
+
+- Issue #14160: TarFile.extractfile() failed to resolve symbolic links when
+ the links were not located in an archive subdirectory.
+
+- Issue #14638: pydoc now treats non-string __name__ values as if they
+ were missing, instead of raising an error.
+
+- Issue #13684: Fix httplib tunnel issue of infinite loops for certain sites
+ which send EOF without trailing \r\n.
+
+- Issue #14605: Add importlib.abc.FileLoader, importlib.machinery.(FileFinder,
+ SourceFileLoader, SourcelessFileLoader, ExtensionFileLoader).
+
+- Issue #13959: imp.cache_from_source()/source_from_cache() now follow
+ os.path.join()/split() semantics for path manipulation instead of its prior,
+ custom semantics of caring the right-most path separator forward in path
+ joining.
+
+- Issue #2193: Allow ":" character in Cookie NAME values.
+
+- Issue #14629: tokenizer.detect_encoding will specify the filename in the
+ SyntaxError exception if found at readline.__self__.name.
+
+- Issue #14629: Raise SyntaxError in tokenizer.detect_encoding if the
+ first two lines have non-UTF-8 characters without an encoding declaration.
+
+- Issue #14308: Fix an exception when a "dummy" thread is in the threading
+ module's active list after a fork().
+
+- Issue #11750: The Windows API functions scattered in the _subprocess and
+ _multiprocessing.win32 modules now live in a single module "_winapi".
+ Patch by sbt.
+
+- Issue #14087: multiprocessing: add Condition.wait_for(). Patch by sbt.
+
+- Issue #14538: HTMLParser can now parse correctly start tags that contain
+ a bare '/'.
+
+- Issue #14452: SysLogHandler no longer inserts a UTF-8 BOM into the message.
+
+- Issue #14386: Expose the dict_proxy internal type as types.MappingProxyType.
+
+- Issue #13959: Make imp.reload() always use a module's __loader__ to perform
+ the reload.
+
+- Issue #13959: Add imp.py and rename the built-in module to _imp, allowing for
+ re-implementing parts of the module in pure Python.
+
+- Issue #13496: Fix potential overflow in bisect.bisect algorithm when applied
+ to a collection of size > sys.maxsize / 2.
+
+- Have importlib take advantage of ImportError's new 'name' and 'path'
+ attributes.
+
+- Issue #14399: zipfile now recognizes that the archive has been modified even
+ if only the comment is changed. In addition, the TypeError that results from
+ trying to set a non-binary value as a comment is now now raised at the time
+ the comment is set rather than at the time the zipfile is written.
+
+- trace.CoverageResults.is_ignored_filename() now ignores any name that starts
+ with "<" and ends with ">" instead of special-casing "<string>" and
+ "<doctest ".
+
+- Issue #12537: The mailbox module no longer depends on knowledge of internal
+ implementation details of the email package Message object.
+
+- Issue #7978: socketserver now restarts the select() call when EINTR is
+ returned. This avoids crashing the server loop when a signal is received.
+ Patch by Jerzy Kozera.
+
+- Issue #14522: Avoid duplicating socket handles in multiprocessing.connection.
+ Patch by sbt.
+
+- Don't Py_DECREF NULL variable in io.IncrementalNewlineDecoder.
+
+- Issue #8515: Set __file__ when run file in IDLE.
+ Initial patch by Bruce Frederiksen.
+
+- Issue #14496: Fix wrong name in idlelib/tabbedpages.py.
+ Patch by Popa Claudiu.
+
+- Issue #3033: Add displayof parameter to tkinter font. Patch by Guilherme Polo.
+
+- Issue #14482: Raise a ValueError, not a NameError, when trying to create
+ a multiprocessing Client or Listener with an AF_UNIX type address under
+ Windows. Patch by Popa Claudiu.
+
+- Issue #802310: Generate always unique tkinter font names if not directly passed.
+
+- Issue #14151: Raise a ValueError, not a NameError, when trying to create
+ a multiprocessing Client or Listener with an AF_PIPE type address under
+ non-Windows platforms. Patch by Popa Claudiu.
+
+- Issue #14493: Use gvfs-open or xdg-open in webbrowser.
+
+Build
+-----
+
+- "make touch" will now touch generated files that are checked into Mercurial,
+ after a "hg update" which failed to bring the timestamps into the right order.
+
+Tests
+-----
+
+- Issue #14026: In test_cmd_line_script, check that sys.argv is populated
+ correctly for the various invocation approaches (Patch by Jason Yeo)
+
+- Issue #14032: Fix incorrect variable name in test_cmd_line_script debugging
+ message (Patch by Jason Yeo)
+
+- Issue #14589: Update certificate chain for sha256.tbs-internet.com, fixing
+ a test failure in test_ssl.
+
+- Issue #14355: Regrtest now supports the standard unittest test loading, and
+ will use it if a test file contains no `test_main` method.
+
+Tools / Demos
+-------------
+
+- Issue #3561: The Windows installer now has an option, off by default, for
+ placing the Python installation into the system "Path" environment variable.
+
+- Issue #13165: stringbench is now available in the Tools/stringbench folder.
+ It used to live in its own SVN project.
+
+
+What's New in Python 3.3.0 Alpha 2?
+===================================
+
+*Release date: 01-Apr-2012*
+
+Core and Builtins
+-----------------
+
+- Issue #1683368: object.__new__ and object.__init__ raise a TypeError if they
+ are passed arguments and their complementary method is not overridden.
+
+- Issue #14378: Fix compiling ast.ImportFrom nodes with a "__future__" string as
+ the module name that was not interned.
+
+- Issue #14331: Use significantly less stack space when importing modules by
+ allocating path buffers on the heap instead of the stack.
+
+- Issue #14334: Prevent in a segfault in type.__getattribute__ when it was not
+ passed strings.
+
+- Issue #1469629: Allow cycles through an object's __dict__ slot to be
+ collected. (For example if ``x.__dict__ is x``).
+
+- Issue #14205: dict lookup raises a RuntimeError if the dict is modified
+ during a lookup.
+
+- Issue #14220: When a generator is delegating to another iterator with the
+ yield from syntax, it needs to have its ``gi_running`` flag set to True.
+
+- Issue #14435: Remove dedicated block allocator from floatobject.c and rely
+ on the PyObject_Malloc() api like all other objects.
+
+- Issue #14471: Fix a possible buffer overrun in the winreg module.
+
+- Issue #14288: Allow the serialization of builtin iterators
+
+Library
+-------
+
+- Issue #14300: Under Windows, sockets created using socket.dup() now allow
+ overlapped I/O. Patch by sbt.
+
+- Issue #13872: socket.detach() now marks the socket closed (as mirrored
+ in the socket repr()). Patch by Matt Joiner.
+
+- Issue #14406: Fix a race condition when using ``concurrent.futures.wait(
+ return_when=ALL_COMPLETED)``. Patch by Matt Joiner.
+
+- Issue #5136: deprecate old, unused functions from tkinter.
+
+- Issue #14409: IDLE now properly executes commands in the Shell window
+ when it cannot read the normal config files on startup and
+ has to use the built-in default key bindings.
+ There was previously a bug in one of the defaults.
+
+- Issue #14416: syslog now defines the LOG_ODELAY and LOG_AUTHPRIV constants
+ if they are defined in <syslog.h>.
+
+- IDLE can be launched as python -m idlelib
+
+- Issue #14295: Add unittest.mock
+
+- Issue #7652: Add --with-system-libmpdec option to configure for linking
+ the _decimal module against an installed libmpdec.
+
+- Issue #14380: MIMEText now defaults to utf-8 when passed non-ASCII unicode
+ with no charset specified.
+
+- Issue #10340: asyncore - properly handle EINVAL in dispatcher constructor on
+ OSX; avoid to call handle_connect in case of a disconnected socket which
+ was not meant to connect.
+
+- Issue #14204: The ssl module now has support for the Next Protocol
+ Negotiation extension, if available in the underlying OpenSSL library.
+ Patch by Colin Marc.
+
+- Issue #3035: Unused functions from tkinter are marked as pending deprecated.
+
+- Issue #12757: Fix the skipping of doctests when python is run with -OO so
+ that it works in unittest's verbose mode as well as non-verbose mode.
+
+- Issue #7652: Integrate the decimal floating point libmpdec library to speed
+ up the decimal module. Performance gains of the new C implementation are
+ between 10x and 100x, depending on the application.
+
+- Issue #3573: IDLE hangs when passing invalid command line args
+ (directory(ies) instead of file(s)) (Patch by Guilherme Polo)
+
+- Issue #14269: SMTPD now conforms to the RFC and requires a HELO command
+ before MAIL, RCPT, or DATA.
+
+- Issue #13694: asynchronous connect in asyncore.dispatcher does not set addr
+ attribute.
+
+- Issue #14344: fixed the repr of email.policy objects.
+
+- Issue #11686: Added missing entries to email package __all__ lists
+ (mostly the new Bytes classes).
+
+- Issue #14335: multiprocessing's custom Pickler subclass now inherits from
+ the C-accelerated implementation. Patch by sbt.
+
+- Issue #10484: Fix the CGIHTTPServer's PATH_INFO handling problem.
+
+- Issue #11199: Fix the with urllib which hangs on particular ftp urls.
+
+- Improve the memory utilization and speed of functools.lru_cache.
+
+- Issue #14222: Use the new time.steady() function instead of time.time() for
+ timeout in queue and threading modules to not be affected of system time
+ update.
+
+- Issue #13248: Remove lib2to3.pytree.Base.get_prefix/set_prefix.
+
+- Issue #14234: CVE-2012-0876: Randomize hashes of xml attributes in the hash
+ table internal to the pyexpat module's copy of the expat library to avoid a
+ denial of service due to hash collisions. Patch by David Malcolm with some
+ modifications by the expat project.
+
+- Issue #14200: Idle shell crash on printing non-BMP unicode character.
+
+- Issue #12818: format address no longer needlessly \ escapes ()s in names when
+ the name ends up being quoted.
+
+- Issue #14062: BytesGenerator now correctly folds Header objects,
+ including using linesep when folding.
+
+- Issue #13839: When invoked on the command-line, the pstats module now
+ accepts several filenames of profile stat files and merges them all.
+ Patch by Matt Joiner.
+
+- Issue #14291: Email now defaults to utf-8 for non-ASCII unicode headers
+ instead of raising an error. This fixes a regression relative to 2.7.
+
+- Issue #989712: Support using Tk without a mainloop.
+
+- Issue #5219: Prevent event handler cascade in IDLE.
+
+- Issue #3835: Refuse to use unthreaded Tcl in threaded Python.
+
+- Issue #2843: Add new Tk API to Tkinter.
+
+- Issue #14184: Increase the default stack size for secondary threads on
+ Mac OS X to avoid interpreter crashes when using threads on 10.7.
+
+- Issue #14180: datetime.date.fromtimestamp(),
+ datetime.datetime.fromtimestamp() and datetime.datetime.utcfromtimestamp()
+ now raise an OSError instead of ValueError if localtime() or gmtime() failed.
+
+- Issue #14180: time.ctime(), gmtime(), time.localtime(),
+ datetime.date.fromtimestamp(), datetime.datetime.fromtimestamp() and
+ datetime.datetime.utcfromtimestamp() now raises an OverflowError, instead of
+ a ValueError, if the timestamp does not fit in time_t.
+
+- Issue #14180: datetime.datetime.fromtimestamp() and
+ datetime.datetime.utcfromtimestamp() now round microseconds towards zero
+ instead of rounding to nearest with ties going away from zero.
+
+- Issue #10543: Fix unittest test discovery with Jython bytecode files.
+
+- Issue #1178863: Separate initialisation from setting when initializing
+ Tkinter.Variables; harmonize exceptions to ValueError; only delete variables
+ that have not been deleted; assert that variable names are strings.
+
+- Issue #14104: Implement time.monotonic() on Mac OS X, patch written by
+ Nicholas Riley.
+
+- Issue #13394: the aifc module now uses warnings.warn() to signal warnings.
+
+- Issue #14252: Fix subprocess.Popen.terminate() to not raise an error under
+ Windows when the child process has already exited.
+
+- Issue #14223: curses.addch() is no more limited to the range 0-255 when the
+ Python curses is not linked to libncursesw. It was a regression introduced
+ in Python 3.3a1.
+
+- Issue #14168: Check for presence of Element._attrs in minidom before
+ accessing it.
+
+- Issue #12328: Fix multiprocessing's use of overlapped I/O on Windows.
+ Also, add a multiprocessing.connection.wait(rlist, timeout=None) function
+ for polling multiple objects at once. Patch by sbt.
+
+- Issue #14007: Accept incomplete TreeBuilder objects (missing start, end,
+ data or close method) for the Python implementation as well.
+ Drop the no-op TreeBuilder().xml() method from the C implementation.
+
+- Issue #14210: pdb now has tab-completion not only for command names, but
+ also for their arguments, wherever possible.
+
+- Issue #14310: Sockets can now be with other processes on Windows using
+ the api socket.socket.share() and socket.fromshare().
+
+- Issue #10576: The gc module now has a 'callbacks' member that will get
+ called when garbage collection takes place.
+
+Build
+-----
+
+- Issue #14557: Fix extensions build on HP-UX. Patch by Adi Roiban.
+
+- Issue #14387: Do not include accu.h from Python.h.
+
+- Issue #14359: Only use O_CLOEXEC in _posixmodule.c if it is defined.
+ Based on patch from Hervé Coatanhay.
+
+- Issue #14321: Do not run pgen during the build if files are up to date.
+
+Documentation
+-------------
+
+- Issue #14034: added the argparse tutorial.
+
+- Issue #14324: Fix configure tests for cross builds.
+
+- Issue #14327: Call AC_CANONICAL_HOST in configure.ac and check in
+ config.{guess,sub}. Don't use uname calls for cross builds.
+
+Extension Modules
+-----------------
+
+- Issue #9041: An issue in ctypes.c_longdouble, ctypes.c_double, and
+ ctypes.c_float that caused an incorrect exception to be returned in the
+ case of overflow has been fixed.
+
+- Issue #14212: The re module didn't retain a reference to buffers it was
+ scanning, resulting in segfaults.
+
+- Issue #14259: The finditer() method of re objects did not take any
+ keyword arguments, contrary to the documentation.
+
+- Issue #10142: Support for SEEK_HOLE/SEEK_DATA (for example, under ZFS).
+
+Tests
+-----
+
+- Issue #14442: Add missing errno import in test_smtplib.
+
+- Issue #8315: (partial fix) python -m unittest test.test_email now works.
+
+
+What's New in Python 3.3.0 Alpha 1?
+===================================
+
+*Release date: 05-Mar-2012*
+
+Core and Builtins
+-----------------
+
+- Issue #14172: Fix reference leak when marshalling a buffer-like object
+ (other than a bytes object).
+
+- Issue #13521: dict.setdefault() now does only one lookup for the given key,
+ making it "atomic" for many purposes. Patch by Filip Gruszczyński.
+
+- PEP 409, Issue #6210: "raise X from None" is now supported as a means of
+ suppressing the display of the chained exception context. The chained
+ context still remains available as the __context__ attribute.
+
+- Issue #10181: New memoryview implementation fixes multiple ownership
+ and lifetime issues of dynamically allocated Py_buffer members (#9990)
+ as well as crashes (#8305, #7433). Many new features have been added
+ (See whatsnew/3.3), and the documentation has been updated extensively.
+ The ndarray test object from _testbuffer.c implements all aspects of
+ PEP-3118, so further development towards the complete implementation
+ of the PEP can proceed in a test-driven manner.
+
+ Thanks to Nick Coghlan, Antoine Pitrou and Pauli Virtanen for review
+ and many ideas.
+
+- Issue #12834: Fix incorrect results of memoryview.tobytes() for
+ non-contiguous arrays.
+
+- Issue #5231: Introduce memoryview.cast() method that allows changing
+ format and shape without making a copy of the underlying memory.
+
+- Issue #14084: Fix a file descriptor leak when importing a module with a
+ bad encoding.
+
+- Upgrade Unicode data to Unicode 6.1.
+
+- Issue #14040: Remove rarely used file name suffixes for C extensions
+ (under POSIX mainly).
+
+- Issue #14051: Allow arbitrary attributes to be set of classmethod and
+ staticmethod.
+
+- Issue #13703: oCERT-2011-003: Randomize hashes of str and bytes to protect
+ against denial of service attacks due to hash collisions within the dict and
+ set types. Patch by David Malcolm, based on work by Victor Stinner.
+
+- Issue #13020: Fix a reference leak when allocating a structsequence object
+ fails. Patch by Suman Saha.
+
+- Issue #13908: Ready types returned from PyType_FromSpec.
+
+- Issue #11235: Fix OverflowError when trying to import a source file whose
+ modification time doesn't fit in a 32-bit timestamp.
+
+- Issue #12705: A SyntaxError exception is now raised when attempting to
+ compile multiple statements as a single interactive statement.
+
+- Fix the builtin module initialization code to store the init function for
+ future reinitialization.
+
+- Issue #8052: The posix subprocess module would take a long time closing
+ all possible file descriptors in the child process rather than just open
+ file descriptors. It now closes only the open fds if possible for the
+ default close_fds=True behavior.
+
+- Issue #13629: Renumber the tokens in token.h so that they match the indexes
+ into _PyParser_TokenNames.
+
+- Issue #13752: Add a casefold() method to str.
+
+- Issue #13761: Add a "flush" keyword argument to the print() function,
+ used to ensure flushing the output stream.
+
+- Issue #13645: pyc files now contain the size of the corresponding source
+ code, to avoid timestamp collisions (especially on filesystems with a low
+ timestamp resolution) when checking for freshness of the bytecode.
+
+- PEP 380, Issue #11682: Add "yield from <x>" to support easy delegation to
+ subgenerators (initial patch by Greg Ewing, integration into 3.3 by
+ Renaud Blanch, Ryan Kelly, Zbigniew Jędrzejewski-Szmek and Nick Coghlan)
+
+- Issue #13748: Raw bytes literals can now be written with the ``rb`` prefix
+ as well as ``br``.
+
+- Issue #12736: Use full unicode case mappings for upper, lower, and title case.
+
+- Issue #12760: Add a create mode to open(). Patch by David Townshend.
+
+- Issue #13738: Simplify implementation of bytes.lower() and bytes.upper().
+
+- Issue #13577: Built-in methods and functions now have a __qualname__.
+ Patch by sbt.
+
+- Issue #6695: Full garbage collection runs now clear the freelist of set
+ objects. Initial patch by Matthias Troffaes.
+
+- Fix OSError.__init__ and OSError.__new__ so that each of them can be
+ overriden and take additional arguments (followup to issue #12555).
+
+- Fix the fix for issue #12149: it was incorrect, although it had the side
+ effect of appearing to resolve the issue. Thanks to Mark Shannon for
+ noticing.
+
+- Issue #13505: Pickle bytes objects in a way that is compatible with
+ Python 2 when using protocols <= 2.
+
+- Issue #11147: Fix an unused argument in _Py_ANNOTATE_MEMORY_ORDER. (Fix
+ given by Campbell Barton).
+
+- Issue #13503: Use a more efficient reduction format for bytearrays with
+ pickle protocol >= 3. The old reduction format is kept with older protocols
+ in order to allow unpickling under Python 2. Patch by Irmen de Jong.
+
+- Issue #7111: Python can now be run without a stdin, stdout or stderr
+ stream. It was already the case with Python 2. However, the corresponding
+ sys module entries are now set to None (instead of an unusable file object).
+
+- Issue #11849: Ensure that free()d memory arenas are really released
+ on POSIX systems supporting anonymous memory mappings. Patch by
+ Charles-François Natali.
+
+- Issue #13452: PyUnicode_EncodeDecimal() doesn't support error handlers
+ different than "strict" anymore. The caller was unable to compute the
+ size of the output buffer: it depends on the error handler.
+
+- PEP 3155 / issue #13448: Qualified name for classes and functions.
+
+- Issue #13436: Fix a bogus error message when an AST object was passed
+ an invalid integer value.
+
+- Issue #13411: memoryview objects are now hashable when the underlying
+ object is hashable.
+
+- Issue #13338: Handle all enumerations in _Py_ANNOTATE_MEMORY_ORDER
+ to allow compiling extension modules with -Wswitch-enum on gcc.
+ Initial patch by Floris Bruynooghe.
+
+- Issue #10227: Add an allocation cache for a single slice object. Patch by
+ Stefan Behnel.
+
+- Issue #13393: BufferedReader.read1() now asks the full requested size to
+ the raw stream instead of limiting itself to the buffer size.
+
+- Issue #13392: Writing a pyc file should now be atomic under Windows as well.
+
+- Issue #13333: The UTF-7 decoder now accepts lone surrogates (the encoder
+ already accepts them).
+
+- Issue #13389: Full garbage collection passes now clear the freelists for
+ list and dict objects. They already cleared other freelists in the
+ interpreter.
+
+- Issue #13327: Remove the need for an explicit None as the second argument
+ to os.utime, os.lutimes, os.futimes, os.futimens, os.futimesat, in
+ order to update to the current time. Also added keyword argument
+ handling to os.utimensat in order to remove the need for explicit None.
+
+- Issue #13350: Simplify some C code by replacing most usages of
+ PyUnicode_Format by PyUnicode_FromFormat.
+
+- Issue #13342: input() used to ignore sys.stdin's and sys.stdout's unicode
+ error handler in interactive mode (when calling into PyOS_Readline()).
+
+- Issue #9896: Add start, stop, and step attributes to range objects.
+
+- Issue #13343: Fix a SystemError when a lambda expression uses a global
+ variable in the default value of a keyword-only argument: ``lambda *,
+ arg=GLOBAL_NAME: None``
+
+- Issue #12797: Added custom opener parameter to builtin open() and
+ FileIO.open().
+
+- Issue #10519: Avoid unnecessary recursive function calls in
+ setobject.c.
+
+- Issue #10363: Deallocate global locks in Py_Finalize().
+
+- Issue #13018: Fix reference leaks in error paths in dictobject.c.
+ Patch by Suman Saha.
+
+- Issue #13201: Define '==' and '!=' to compare range objects based on
+ the sequence of values they define (instead of comparing based on
+ object identity).
+
+- Issue #1294232: In a few cases involving metaclass inheritance, the
+ interpreter would sometimes invoke the wrong metaclass when building a new
+ class object. These cases now behave correctly. Patch by Daniel Urban.
+
+- Issue #12753: Add support for Unicode name aliases and named sequences.
+ Both ``unicodedata.lookup()`` and '\N{...}' now resolve aliases,
+ and ``unicodedata.lookup()`` resolves named sequences too.
+
+- Issue #12170: The count(), find(), rfind(), index() and rindex() methods
+ of bytes and bytearray objects now accept an integer between 0 and 255
+ as their first argument. Patch by Petri Lehtinen.
+
+- Issue #12604: VTRACE macro expanded to no-op in _sre.c to avoid compiler
+ warnings. Patch by Josh Triplett and Petri Lehtinen.
+
+- Issue #12281: Rewrite the MBCS codec to handle correctly replace and ignore
+ error handlers on all Windows versions. The MBCS codec is now supporting all
+ error handlers, instead of only replace to encode and ignore to decode.
+
+- Issue #13188: When called without an explicit traceback argument,
+ generator.throw() now gets the traceback from the passed exception's
+ ``__traceback__`` attribute. Patch by Petri Lehtinen.
+
+- Issue #13146: Writing a pyc file is now atomic under POSIX.
+
+- Issue #7833: Extension modules built using distutils on Windows will no
+ longer include a "manifest" to prevent them failing at import time in some
+ embedded situations.
+
+- PEP 3151 / issue #12555: reworking the OS and IO exception hierarchy.
+
+- Add internal API for static strings (_Py_identifier et al.).
+
+- Issue #13063: the Windows error ERROR_NO_DATA (numbered 232 and described
+ as "The pipe is being closed") is now mapped to POSIX errno EPIPE
+ (previously EINVAL).
+
+- Issue #12911: Fix memory consumption when calculating the repr() of huge
+ tuples or lists.
+
+- PEP 393: flexible string representation. Thanks to Torsten Becker for the
+ initial implementation, and Victor Stinner for various bug fixes.
+
+- Issue #14081: The 'sep' and 'maxsplit' parameter to str.split, bytes.split,
+ and bytearray.split may now be passed as keyword arguments.
+
+- Issue #13012: The 'keepends' parameter to str.splitlines may now be passed
+ as a keyword argument: "my_string.splitlines(keepends=True)". The same
+ change also applies to bytes.splitlines and bytearray.splitlines.
+
+- Issue #7732: Don't open a directory as a file anymore while importing a
+ module. Ignore the direcotry if its name matchs the module name (e.g.
+ "__init__.py") and raise a ImportError instead.
+
+- Issue #13021: Missing decref on an error path. Thanks to Suman Saha for
+ finding the bug and providing a patch.
+
+- Issue #12973: Fix overflow checks that relied on undefined behaviour in
+ list_repeat (listobject.c) and islice_next (itertoolsmodule.c). These bugs
+ caused test failures with recent versions of Clang.
+
+- Issue #12904: os.utime, os.futimes, os.lutimes, and os.futimesat now write
+ atime and mtime with nanosecond precision on modern POSIX platforms.
+
+- Issue #12802: the Windows error ERROR_DIRECTORY (numbered 267) is now
+ mapped to POSIX errno ENOTDIR (previously EINVAL).
+
+- Issue #9200: The str.is* methods now work with strings that contain non-BMP
+ characters even in narrow Unicode builds.
+
+- Issue #12791: Break reference cycles early when a generator exits with
+ an exception.
+
+- Issue #12773: Make __doc__ mutable on user-defined classes.
+
+- Issue #12766: Raise a ValueError when creating a class with a class variable
+ that conflicts with a name in __slots__.
+
+- Issue #12266: Fix str.capitalize() to correctly uppercase/lowercase
+ titlecased and cased non-letter characters.
+
+- Issue #12732: In narrow unicode builds, allow Unicode identifiers which fall
+ outside the BMP.
+
+- Issue #12575: Validate user-generated AST before it is compiled.
+
+- Make type(None), type(Ellipsis), and type(NotImplemented) callable. They
+ return the respective singleton instances.
+
+- Forbid summing bytes with sum().
+
+- Verify the types of AST strings and identifiers provided by the user before
+ compiling them.
+
+- Issue #12647: The None object now has a __bool__() method that returns False.
+ Formerly, bool(None) returned False only because of special case logic
+ in PyObject_IsTrue().
+
+- Issue #12579: str.format_map() now raises a ValueError if used on a
+ format string that contains positional fields. Initial patch by
+ Julian Berman.
+
+- Issue #10271: Allow warnings.showwarning() be any callable.
+
+- Issue #11627: Fix segfault when __new__ on a exception returns a
+ non-exception class.
+
+- Issue #12149: Update the method cache after a type's dictionary gets
+ cleared by the garbage collector. This fixes a segfault when an instance
+ and its type get caught in a reference cycle, and the instance's
+ deallocator calls one of the methods on the type (e.g. when subclassing
+ IOBase). Diagnosis and patch by Davide Rizzo.
+
+- Issue #9611, #9015: FileIO.read() clamps the length to INT_MAX on Windows.
+
+- Issue #9642: Uniformize the tests on the availability of the mbcs codec, add
+ a new HAVE_MBCS define.
+
+- Issue #9642: Fix filesystem encoding initialization: use the ANSI code page
+ on Windows if the mbcs codec is not available, and fail with a fatal error if
+ we cannot get the locale encoding (if nl_langinfo(CODESET) is not available)
+ instead of using UTF-8.
+
+- When a generator yields, do not retain the caller's exception state on the
+ generator.
+
+- Issue #12475: Prevent generators from leaking their exception state into the
+ caller's frame as they return for the last time.
+
+- Issue #12291: You can now load multiple marshalled objects from a stream,
+ with other data interleaved between marshalled objects.
+
+- Issue #12356: When required positional or keyword-only arguments are not
+ given, produce a informative error message which includes the name(s) of the
+ missing arguments.
+
+- Issue #12370: Fix super with no arguments when __class__ is overriden in the
+ class body.
+
+- Issue #12084: os.stat on Windows now works properly with relative symbolic
+ links when called from any directory.
+
+- Loosen type restrictions on the __dir__ method. __dir__ can now return any
+ sequence, which will be converted to a list and sorted by dir().
+
+- Issue #12265: Make error messages produced by passing an invalid set of
+ arguments to a function more informative.
+
+- Issue #12225: Still allow Python to build if Python is not in its hg repo or
+ mercurial is not installed.
+
+- Issue #1195: my_fgets() now always clears errors before calling fgets(). Fix
+ the following case: sys.stdin.read() stopped with CTRL+d (end of file),
+ raw_input() interrupted by CTRL+c.
+
+- Issue #12216: Allow unexpected EOF errors to happen on any line of the file.
+
+- Issue #12199: The TryExcept and TryFinally and AST nodes have been unified
+ into a Try node.
+
+- Issue #9670: Increase the default stack size for secondary threads on
+ Mac OS X and FreeBSD to reduce the chances of a crash instead of a
+ "maximum recursion depth" RuntimeError exception.
+ (patch by Ronald Oussoren)
+
+- Issue #12106: The use of the multiple-with shorthand syntax is now reflected
+ in the AST.
+
+- Issue #12190: Try to use the same filename object when compiling unmarshalling
+ a code objects in the same file.
+
+- Issue #12166: Move implementations of dir() specialized for various types into
+ the __dir__() methods of those types.
+
+- Issue #5715: In socketserver, close the server socket in the child process.
+
+- Correct lookup of __dir__ on objects. Among other things, this causes errors
+ besides AttributeError found on lookup to be propagated.
+
+- Issue #12060: Use sig_atomic_t type and volatile keyword in the signal
+ module. Patch written by Charles-François Natali.
+
+- Issue #1746656: Added the if_nameindex, if_indextoname, if_nametoindex
+ methods to the socket module.
+
+- Issue #12044: Fixed subprocess.Popen when used as a context manager to
+ wait for the process to end when exiting the context to avoid unintentionally
+ leaving zombie processes around.
+
+- Issue #1195: Fix input() if it is interrupted by CTRL+d and then CTRL+c,
+ clear the end-of-file indicator after CTRL+d.
+
+- Issue #1856: Avoid crashes and lockups when daemon threads run while the
+ interpreter is shutting down; instead, these threads are now killed when
+ they try to take the GIL.
+
+- Issue #9756: When calling a method descriptor or a slot wrapper descriptor,
+ the check of the object type doesn't read the __class__ attribute anymore.
+ Fix a crash if a class override its __class__ attribute (e.g. a proxy of the
+ str type). Patch written by Andreas Stührk.
+
+- Issue #10517: After fork(), reinitialize the TLS used by the PyGILState_*
+ APIs, to avoid a crash with the pthread implementation in RHEL 5. Patch
+ by Charles-François Natali.
+
+- Issue #10914: Initialize correctly the filesystem codec when creating a new
+ subinterpreter to fix a bootstrap issue with codecs implemented in Python, as
+ the ISO-8859-15 codec.
+
+- Issue #11918: OS/2 and VMS are no more supported because of the lack of
+ maintainer.
+
+- Issue #6780: fix starts/endswith error message to mention that tuples are
+ accepted too.
+
+- Issue #5057: fix a bug in the peepholer that led to non-portable pyc files
+ between narrow and wide builds while optimizing BINARY_SUBSCR on non-BMP
+ chars (e.g. "\U00012345"[0]).
+
+- Issue #11845: Fix typo in rangeobject.c that caused a crash in
+ compute_slice_indices. Patch by Daniel Urban.
+
+- Issue #5673: Added a `timeout` keyword argument to subprocess.Popen.wait,
+ subprocess.Popen.communicated, subprocess.call, subprocess.check_call, and
+ subprocess.check_output. If the blocking operation takes more than `timeout`
+ seconds, the `subprocess.TimeoutExpired` exception is raised.
+
+- Issue #11650: PyOS_StdioReadline() retries fgets() if it was interrupted
+ (EINTR), for example if the program is stopped with CTRL+z on Mac OS X. Patch
+ written by Charles-Francois Natali.
+
+- Issue #9319: Include the filename in "Non-UTF8 code ..." syntax error.
+
+- Issue #10785: Store the filename as Unicode in the Python parser.
+
+- Issue #11619: _PyImport_LoadDynamicModule() doesn't encode the path to bytes
+ on Windows.
+
+- Issue #10998: Remove mentions of -Q, sys.flags.division_warning and
+ Py_DivisionWarningFlag left over from Python 2.
+
+- Issue #11244: Remove an unnecessary peepholer check that was preventing
+ negative zeros from being constant-folded properly.
+
+- Issue #11395: io.FileIO().write() clamps the data length to 32,767 bytes on
+ Windows if the file is a TTY to workaround a Windows bug. The Windows console
+ returns an error (12: not enough space error) on writing into stdout if
+ stdout mode is binary and the length is greater than 66,000 bytes (or less,
+ depending on heap usage).
+
+- Issue #11320: fix bogus memory management in Modules/getpath.c, leading to
+ a possible crash when calling Py_SetPath().
+
+- Issue #11432: A bug was introduced in subprocess.Popen on posix systems with
+ 3.2.0 where the stdout or stderr file descriptor being the same as the stdin
+ file descriptor would raise an exception. webbrowser.open would fail. fixed.
+
+- Issue #9856: Change object.__format__ with a non-empty format string
+ to be a DeprecationWarning. In 3.2 it was a PendingDeprecationWarning.
+ In 3.4 it will be a TypeError.
+
+- Issue #11244: The peephole optimizer is now able to constant-fold
+ arbitrarily complex expressions. This also fixes a 3.2 regression where
+ operations involving negative numbers were not constant-folded.
+
+- Issue #11450: Don't truncate hg version info in Py_GetBuildInfo() when
+ there are many tags (e.g. when using mq). Patch by Nadeem Vawda.
+
+- Issue #11335: Fixed a memory leak in list.sort when the key function
+ throws an exception.
+
+- Issue #8923: When a string is encoded to UTF-8 in strict mode, the result is
+ cached into the object. Examples: str.encode(), str.encode('utf-8'),
+ PyUnicode_AsUTF8String() and PyUnicode_AsEncodedString(unicode, "utf-8",
+ NULL).
+
+- Issue #10831: PyUnicode_FromFormat() supports %li, %lli and %zi formats.
+
+- Issue #10829: Refactor PyUnicode_FromFormat(), use the same function to parse
+ the format string in the 3 steps, fix crashs on invalid format strings.
+
+- Issue #13007: whichdb should recognize gdbm 1.9 magic numbers.
+
+- Issue #11246: Fix PyUnicode_FromFormat("%V") to decode the byte string from
+ UTF-8 (with replace error handler) instead of ISO-8859-1 (in strict mode).
+ Patch written by Ray Allen.
+
+- Issue #11286: Raise a ValueError from calling PyMemoryView_FromBuffer with
+ a buffer struct having a NULL data pointer.
+
+- Issue #11272: On Windows, input() strips '\r' (and not only '\n'), and
+ sys.stdin uses universal newline (replace '\r\n' by '\n').
+
+- issue #11828: startswith and endswith don't accept None as slice index.
+ Patch by Torsten Becker.
+
+- Issue #10830: Fix PyUnicode_FromFormatV("%c") for non-BMP characters on
+ narrow build.
+
+- Issue #11168: Remove filename debug variable from PyEval_EvalFrameEx().
+ It encoded the Unicode filename to UTF-8, but the encoding fails on
+ undecodable filename (on surrogate characters) which raises an unexpected
+ UnicodeEncodeError on recursion limit.
+
+- Issue #11187: Remove bootstrap code (use ASCII) of
+ PyUnicode_AsEncodedString(), it was replaced by a better fallback (use the
+ locale encoding) in PyUnicode_EncodeFSDefault().
+
+- Check for NULL result in PyType_FromSpec.
+
+- Issue #10516: New copy() and clear() methods for lists and bytearrays.
+
+- Issue #11386: bytearray.pop() now throws IndexError when the bytearray is
+ empty, instead of OverflowError.
+
+- Issue #12380: The rjust, ljust and center methods of bytes and bytearray
+ now accept a bytearray argument.
+
+Library
+-------
+
+- Issue #14195: An issue that caused weakref.WeakSet instances to incorrectly
+ return True for a WeakSet instance 'a' in both 'a < a' and 'a > a' has been
+ fixed.
+
+- Issue #14166: Pickler objects now have an optional ``dispatch_table``
+ attribute which allows to set custom per-pickler reduction functions.
+ Patch by sbt.
+
+- Issue #14177: marshal.loads() now raises TypeError when given an unicode
+ string. Patch by Guilherme Gonçalves.
+
+- Issue #13550: Remove the debug machinery from the threading module: remove
+ verbose arguments from all threading classes and functions.
+
+- Issue #14159: Fix the len() of weak containers (WeakSet, WeakKeyDictionary,
+ WeakValueDictionary) to return a better approximation when some objects
+ are dead or dying. Moreover, the implementation is now O(1) rather than
+ O(n).
+
+- Issue #13125: Silence spurious test_lib2to3 output when in non-verbose mode.
+ Patch by Mikhail Novikov.
+
+- Issue #11841: Fix comparison bug with 'rc' versions in packaging.version.
+ Patch by Filip Gruszczyński.
+
+- Issue #13447: Add a test file to host regression tests for bugs in the
+ scripts found in the Tools directory.
+
+- Issue #6884: Fix long-standing bugs with MANIFEST.in parsing in distutils
+ on Windows. Also fixed in packaging.
+
+- Issue #8033: sqlite3: Fix 64-bit integer handling in user functions
+ on 32-bit architectures. Initial patch by Philippe Devalkeneer.
+
+- HTMLParser is now able to handle slashes in the start tag.
+
+- Issue #13641: Decoding functions in the base64 module now accept ASCII-only
+ unicode strings. Patch by Catalin Iacob.
+
+- Issue #14043: Speed up importlib's _FileFinder by at least 8x, and add a
+ new importlib.invalidate_caches() function.
+
+- Issue #14001: CVE-2012-0845: xmlrpc: Fix an endless loop in
+ SimpleXMLRPCServer upon malformed POST request.
+
+- Issue #13961: Move importlib over to using os.replace() for atomic renaming.
+
+- Do away with ambiguous level values (as suggested by PEP 328) in
+ importlib.__import__() by raising ValueError when level < 0.
+
+- Issue #2489: pty.spawn could consume 100% cpu when it encountered an EOF.
+
+- Issue #13014: Fix a possible reference leak in SSLSocket.getpeercert().
+
+- Issue #13777: Add PF_SYSTEM sockets on OS X.
+ Patch by Michael Goderbauer.
+
+- Issue #13015: Fix a possible reference leak in defaultdict.__repr__.
+ Patch by Suman Saha.
+
+- Issue #1326113: distutils' and packaging's build_ext commands option now
+ correctly parses multiple values (separated by whitespace or commas) given
+ to their --libraries option.
+
+- Issue #10287: nntplib now queries the server's CAPABILITIES first before
+ sending MODE READER, and only sends it if not already in READER mode.
+ Patch by Hynek Schlawack.
+
+- Issue #13993: HTMLParser is now able to handle broken end tags when
+ strict=False.
+
+- Issue #13930: lib2to3 now supports writing converted output files to another
+ directory tree as well as copying unchanged files and altering the file
+ suffix.
- Issue #9750: Fix sqlite3.Connection.iterdump on tables and fields
with a name that is a keyword or contains quotes. Patch by Marko
projects / python / commitdiff