5 (editors: check NEWS.help for information about editing NEWS using ReST.)
7 What's New in Python 2.7 alpha 1
8 ================================
10 *Release date: XX-XXX-20XX*
15 - Issue #4978: Passing keyword arguments as unicode strings is now allowed.
17 - Issue 1242657: the __len__() and __length_hint__() calls in several tools
18 were suppressing all exceptions. These include list(), filter(), map(),
19 zip(), and bytearray().
21 - os.ftruncate raises OSErrors instead of IOErrors for consistency with other os
24 - Issue #4991: Passing invalid file descriptors to io.FileIO now raises an
27 - Issue #4807: Port the _winreg module to Windows CE.
29 - Issue #4935: The overflow checking code in the expandtabs() method common
30 to str, bytes and bytearray could be optimized away by the compiler, letting
31 the interpreter segfault instead of raising an error.
33 - Issue #3720: Fix a crash when an iterator modifies its class and removes its
36 - Issue #4893: Use NT threading on CE.
38 - Issue #4915: Port sysmodule to Windows CE.
40 - Issue #4074: Change the criteria for doing a full garbage collection (i.e.
41 collecting the oldest generation) so that allocating lots of objects without
42 destroying them does not show quadratic performance. Based on a proposal by
44 http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
46 - Issue #4850: Change COUNT_ALLOCS variables to Py_ssize_t.
48 - Issue #1180193: When importing a module from a .pyc (or .pyo) file with
49 an existing .py counterpart, override the co_filename attributes of all
50 code objects if the original filename is obsolete (which can happen if the
51 file has been renamed, moved, or if it is accessed through different paths).
52 Patch by Ziga Seilnacht and Jean-Paul Calderone.
54 - Issue #4075: Use OutputDebugStringW in Py_FatalError.
56 - Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
57 file with `str' filename on Windows.
59 - Issue #3680: Reference cycles created through a dict, set or deque iterator
60 did not get collected.
62 - Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
63 where the tp_hash and tp_dict slots are both NULL.
65 - Issue #4764: With io.open, IOError.filename is set when trying to open a
66 directory on POSIX systems.
68 - Issue #4764: IOError.filename is set when trying to open a directory on POSIX
71 - Issue #4759: None is now allowed as the first argument of
72 bytearray.translate(). It was always allowed for bytes.translate().
74 - Added test case to ensure attempts to read from a file opened for writing
77 - Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
78 print elapsed times, not only when some objects are uncollectable /
79 unreachable. Original patch by Neil Schemenauer.
81 - Issue #3439: Add a bit_length method to int and long.
83 - Issue #2183: Simplify and optimize bytecode for list comprehensions.
84 Original patch by Neal Norwitz.
86 - Issue #4597: Fixed exception handling when the __exit__ function of a
87 context manager returns a value that cannot be converted to a bool.
89 - Issue #4597: Fixed several opcodes that weren't always propagating
92 - Issue #4445: Replace "sizeof(PyStringObject)" with
93 "offsetof(PyStringObject, ob_sval) + 1" when allocating memory for
94 str instances. On a typical machine this saves 3 bytes of memory
95 (on average) per string allocation.
97 - Issue #3996: On Windows, the PyOS_CheckStack function would cause the
98 interpreter to abort ("Fatal Python error: Could not reset the stack!")
99 instead of throwing a MemoryError.
101 - Issue #3689: The list reversed iterator now supports __length_hint__
102 instead of __len__. Behavior now matches other reversed iterators.
104 - Issue #4367: Python would segfault during compiling when the unicodedata
105 module couldn't be imported and \N escapes were present.
107 - Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
108 method on file objects with closefd=False. The file descriptor is still
109 kept open but the file object behaves like a closed file. The ``FileIO``
110 object also got a new readonly attribute ``closefd``.
112 - Issue #4348: Some bytearray methods returned that didn't cause any change to
113 the bytearray, returned the same bytearray instead of a copy.
115 - Issue #4317: Fixed a crash in the imageop.rgb2rgb8() function.
117 - Issue #4230: If ``__getattr__`` is a descriptor, it now functions correctly.
119 - Issue #4048: The parser module now correctly validates relative imports.
121 - Issue #4225: ``from __future__ import unicode_literals`` didn't work in an
124 - Issue #4176: Fixed a crash when pickling an object which ``__reduce__``
125 method does not return iterators for the 4th and 5th items.
127 - Issue #4209: Enabling unicode_literals and the print_function in the same
128 __future__ import didn't work.
130 - Using ``nonlocal`` as a variable name will now raise a Py3k SyntaxWarning
131 because it is a reserved word in 3.x.
133 - On windows, os.chdir given unicode was not working if GetCurrentDirectoryW
134 returned a path longer than MAX_PATH. (But It's doubtful this code path is
135 really executed because I cannot move to such directory on win2k)
137 - Issue #4069: When set.remove(element) is used with a set element, the element
138 is temporarily replaced with an equivalent frozenset. But the eventual
139 KeyError would always report the empty frozenset([]) as the missing key. Now
140 it correctly refers to the initial element.
142 - Issue #4509: Various issues surrounding resize of bytearray objects to
143 which there are buffer exports.
145 - Issue #4748: Lambda generators no longer return a value.
147 - Issue #3582: Use native TLS functions on Windows
152 - Issue #5170: Fixed Unicode output bug in logging and added test case.
153 This is a regression which did not occur in 2.5.
155 - Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
156 public documented method ``ZipImporter.get_filename()``.
158 - Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
159 the execution of packages by looking for and executing a ``__main__``
160 submodule when a package name is supplied. Initial patch by Andi
163 - Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
164 not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
165 Tkapp_Call when calling from a thread different than the one that created
166 the Tcl interpreter. Patch by Robert Hancock.
168 - Issue #1520877: Now distutils.sysconfig reads $AR from the
169 environment/Makefile. Patch by Douglas Greiman.
171 - Issue #4285: Change sys.version_info to be a named tuple. Patch by
174 - Issue #1276768: The verbose option was not used in the code of
175 distutils.file_util and distutils.dir_util.
177 - Issue #5132: Fixed trouble building extensions under Solaris with
178 --enabled-shared activated. Initial patch by Dave Peterson.
180 - Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
182 - Issue #2047: shutil.move() could believe that its destination path was
183 inside its source path if it began with the same letters (e.g. "src" vs.
186 - Issue 4920: Fixed .next() vs .__next__() issues in the ABCs for
187 Iterator and MutableSet.
189 - Added the ttk module. See issue #2983: Ttk support for Tkinter.
191 - Issue 5021: doctest.testfile() did not create __name__ and
192 collections.namedtuple() relied on __name__ being defined.
194 - Backport importlib from Python 3.1. Only the import_module() function has
195 been backported to help facilitate transitions from 2.7 to 3.1.
197 - Issue #1885: distutils. When running sdist with --formats=tar,gztar
198 the tar file was overriden by the gztar one.
200 - Issue #4863: distutils.mwerkscompiler has been removed.
202 - Added a new itertools functions: combinations_with_replacement()
205 - Fix and properly document the multiprocessing module's logging
206 support, expose the internal levels and provide proper usage
209 - Issue #1672332: fix unpickling of subnormal floats, which was
210 producing a ValueError on some platforms.
212 - Issue #3881: Help Tcl to load even when started through the
213 unreadable local symlink to "Program Files" on Vista.
215 - Issue #4710: Extract directories properly in the zipfile module;
216 allow adding directories to a zipfile.
218 - Issue #3807: _multiprocessing build fails when configure is passed
219 --without-threads argument. When this occurs, _multiprocessing will
220 be disabled, and not compiled.
222 - Issue #5008: When a file is opened in append mode with the new IO library,
223 do an explicit seek to the end of file (so that e.g. tell() returns the
224 file size rather than 0). This is consistent with the behaviour of the
225 traditional 2.x file object.
227 - Issue #5013: Fixed a bug in FileHandler which occurred when the delay
230 - Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
231 which inherited from numbers.py which did not have __slots__ defined. The
232 numbers heirarchy now has its own __slots__ declarations.
234 - Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
235 for *nix machines for negative handles and large int handles. Without this check
236 it is possible to segfault the interpreter.
238 - Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
241 - Issue #1225107: inspect.isclass() returned True for instances with a custom
244 - Issue #3997: zipfiles generated with more than 65536 files could not be
245 opened with other applications.
247 - Issue #1162154: inspect.getmembers() now skips attributes that raise
248 AttributeError, e.g. a __slots__ attribute which has not been set.
250 - Issue #1696199: Add collections.Counter() for rapid and convenient
253 - Issue #3860: GzipFile and BZ2File now support the context manager protocol.
255 - Issue #4272: Add an optional argument to the GzipFile constructor to override
256 the timestamp in the gzip stream. The default value remains the current time.
257 The information can be used by e.g. gunzip when decompressing. Patch by
260 - Restore Python 2.3 compatibility for decimal.py.
262 - Issue #1702551: distutils sdist was not excluding VCS directories under
263 Windows. Inital solution by Guy Dalberto.
265 - The _tkinter module functions "createfilehandler", "deletefilehandler",
266 "createtimerhandler", "mainloop", "dooneevent" and "quit" have been
267 deprecated for removal in 3.x
269 - Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
270 to the decimal module.
272 - Issue #4812: add missing underscore prefix to some internal-use-only
273 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
275 - Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
276 the function is not a generator.
278 - Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
279 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
281 - Issue #4646: distutils was choking on empty options arg in the setup
282 function. Original patch by Thomas Heller.
284 - Fractions.from_float() no longer loses precision for integers too big to
287 - Issue 4790: The nsmallest() and nlargest() functions in the heapq module
288 did unnecessary work in the common case where no key function was specified.
290 - Issue #3767: Convert Tk object to string in tkColorChooser.
292 - Issue #3248: Allow placing ScrolledText in a PanedWindow.
294 - Issue #4444: Allow assertRaises() to be used as a context handler, so that
295 the code under test can be written inline if more practical.
297 - Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
298 works as expected in the interactive environment.
300 - Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
303 - Issue #4400: .pypirc default generated file was broken in distutils.
305 - Issue #4736: io.BufferedRWPair's closed property now functions properly.
307 - Issue #3954: Fix a potential SystemError in _hotshot.logreader error
310 - Issue #4574: fix a crash in io.IncrementalNewlineDecoder when a carriage
311 return encodes to more than one byte in the source encoding (e.g. UTF-16)
312 and gets split on a chunk boundary.
314 - Issue #4223: inspect.getsource() will now correctly display source code
315 for packages loaded via zipimport (or any other conformant PEP 302
316 loader). Original patch by Alexander Belopolsky.
318 - Issue #4201: pdb can now access and display source code loaded via
319 zipimport (or any other conformant PEP 302 loader). Original patch by
320 Alexander Belopolsky.
322 - Issue #4197: doctests in modules loaded via zipimport (or any other PEP
323 302 conformant loader) will now work correctly in most cases (they
324 are still subject to the constraints that exist for all code running
325 from inside a module loaded via a PEP 302 loader and attempting to
326 perform IO operations based on __file__). Original patch by
327 Alexander Belopolsky.
329 - Issues #4082 and #4512: Add runpy support to zipimport in a manner that
330 allows backporting to maintenance branches. Original patch by
331 Alexander Belopolsky.
333 - Issue #4163: Use unicode-friendly word splitting in the textwrap functions
334 when given an unicode string.
336 - Issue #4616: TarFile.utime(): Restore directory times on Windows.
338 - Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
339 give correct results in the case where one argument is a quiet NaN
340 and the other is a finite number that requires rounding.
342 - Issue #1030250: Distutils created directories even when run with the
345 - Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
348 - Issue #4529: fix the parser module's validation of try-except-finally
351 - Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
352 not a malformed option.
354 - Added the subprocess.check_output() convenience function to get output
355 from a subprocess on success or raise an exception on error.
357 - Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
358 support unusual filenames (such as those containing semi-colons) in
359 Content-Disposition headers.
361 - Issue #4384: Added logging integration with warnings module using
362 captureWarnings(). This change includes a NullHandler which does nothing;
363 it will be of use to library developers who want to avoid the "No handlers
364 could be found for logger XXX" message which can appear if the library user
365 doesn't configure logging.
367 - Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
370 - Issue #4363: The uuid.uuid1() and uuid.uuid4() functions now work even if
371 the ctypes module is not present.
373 - FileIO's mode attribute now always includes ``"b"``.
375 - Issue #4116: Resolve member name conflict in ScrolledCanvas.__init__.
377 - httplib.HTTPConnection.putheader() now accepts an arbitrary number of values
378 for any header, matching what the documentation has claimed for a while.
380 - Issue #3774: Fixed an error when create a Tkinter menu item without command
383 - Fixed a modulefinder crash on certain relative imports.
385 - Issue #4150: Pdb's "up" command now works for generator frames in post-mortem
388 - Issue #4092: Return ArgInfo as promised in the documentation from
389 inspect.getargvalues.
391 - Issue #3935: Properly support list subclasses in bisect's C implementation.
393 - Issue #4014: Don't claim that Python has an Alpha release status, in addition
394 to claiming it is Mature.
396 - Issue #4730: Fixed the cPickle module to handle correctly astral characters
397 when protocol 0 is used.
399 - Issue #1594: MacOS.GetCreatorAndType now always returns a big-endian result,
400 to be consistent with Apple tools.
402 - Issue #900949: plat-mac/videoreader.py no longer relies on a non-existing
405 - Issue #16278952: plat-mac/videoreader.py now correctly imports MediaDescr
407 - Issue #1737832 : plat-mac/EasyDialog.py no longer uses the broken aepack
410 - Issue #1149804: macostools.mkdirs now even works when another process
411 creates one of the needed subdirectories.
413 - Issue #900506: added --no-zipimport flag to the bundlebuilder script
415 - Issue #841800: bundlebuilder now works with 'python -O'
417 - Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
418 biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
420 - Issue #5104: The socket module now raises OverflowError when 16-bit port and
421 protocol numbers are supplied outside the allowed 0-65536 range on bind()
424 - Issue #999042: The Python compiler now handles explict global statements
425 correctly (should be assigned using STORE_GLOBAL opcode).
430 - Ttk demos added in Demo/tkinter/ttk/
432 - Issue #4677: add two list comprehension tests to pybench.
437 - Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
439 - Issue #4895: Use _strdup on Windows CE.
441 - Issue #4472: "configure --enable-shared" now works on OSX
443 - Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
445 - Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
447 - Issue #4289: Remove Cancel button from AdvancedDlg.
449 - Issue #1656675: Register a drop handler for .py* files on Windows.
451 - Issue #4120: Exclude manifest from extension modules in VS2008.
453 - Issue #4091: Install pythonxy.dll in system32 again.
455 - Issue #4018: Disable "for me" installations on Vista.
457 - Issue #3758: Add ``patchcheck`` build target to .PHONY.
459 - Issue #4204: Fixed module build errors on FreeBSD 4.
464 - Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
466 - Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
467 the GIL is released, or owned by another thread.
469 - Issue #4122: On Windows, fix a compilation error when using the
470 Py_UNICODE_ISSPACE macro in an extension module.
472 - Issue #4293: Py_AddPendingCall is now thread safe and can be used for
473 asynchronous notifications to python from any thread. Documentation added.
478 - Issue #4397: Fix occasional test_socket failure on OS X.
480 - Issue #4279: Fix build of parsermodule under Cygwin.
482 - Issue #4051: Prevent conflict of UNICODE macros in cPickle.
484 - Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
486 - Issue #1040026: Fix os.times result on systems where HZ is incorrect.
488 - Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
491 - Issue #4365: Add crtassem.h constants to the msvcrt module.
493 - Issue #4396: The parser module now correctly validates the with statement.
498 - Issue #5083: New 'gui' resource for regrtest.
501 What's New in Python 2.6 final
502 ==============================
504 *Release date: 01-Oct-2008*
509 - Issue #3967: Fixed a crash in the count() and find() methods of string-like
510 objects, when the "start" parameter is a huge value.
512 - Issue #3965: Fixed a crash on Windows when open() is given an invalid
513 filename or mode, and the filename is a unicode string.
515 - Bug #3951: Py_USING_MEMORY_DEBUGGER should not be enabled by default.
520 - Issue #3965: Allow repeated calls to turtle.Screen, by making it a
521 true singleton object.
523 - Issue #3895: It was possible to crash the interpreter when an external timer
524 was used with cProfile that returned an object that could not be converted
527 - Issue #3950: Made turtle respect scale factors.
529 - Issue #3547: Fixed ctypes structures bitfields of varying integer
532 - Issue #3879: A regression in urllib.getproxies_enviroment was fixed.
534 - Issue #3863: Disabled a unit test of fork being called from a thread
535 when running on platforms known to exhibit OS bugs when attempting that.
540 - Bug #3989: Package the 2to3 script (as 2to3.py) in the Windows
543 - Bug #3887: Package x64 version of CRT for AMD64 Windows binaries.
546 What's New in Python 2.6 release candidate 2?
547 =============================================
549 *Release date: 17-Sep-2008*
557 - Security Issue #2: imageop did not validate arguments correctly and could
558 segfault as a result.
560 - Issue #3886: Possible integer overflows in the _hashopenssl module were
566 - Issue #3850: recursion tests in Misc/find_recursion_limit.py can raise
567 AttributeError instead of RuntimeError, depending in which C API call
568 exactly the recursion limit is exceeded. Consequently, both exception types
569 are caught and silenced.
574 - Issue #3617: Include a licensing statement regarding the Microsoft
575 C runtime in the Windows installer.
578 What's New in Python 2.6 release candidate 1?
579 =============================================
581 *Release date: 12-Sep-2008*
586 - Issue #3642: Suppress warning in obmalloc when size_t is larger than uint.
588 - Issue #3743: In a few places, PY_FORMAT_SIZE_T was incorrectly used with
589 PyString_FromFormat or PyErr_Format to display size_t values. The macro
590 PY_FORMAT_SIZE_T is designed to select the correct format for the OS
591 ``printf`` function, whereas PyString_FromFormat has an independent
592 implementation and uses "%zd" on all platforms for size_t values.
593 This makes a difference on win64, where ``printf`` needs "%Id" to display
596 - Issue #3634: _weakref.ref(Exception).__init__() gave invalid return value on
599 - Issue #3777: long() applied to a float object now always return a long
600 object; previously an int would be returned for small values. the __long__
601 method is allowed to return either an int or a long, but the behaviour of
602 float objects should not change to respect backward compatibility.
604 - Issue #3751: str.rpartition would perform a left-partition when called with
607 - Issue #3683: Fix compilation when --without-threads is given.
609 - Issue #3668: Fix a memory leak with the "s*" argument parser in
610 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
611 was correctly parsed but parsing of subsequent arguments failed.
613 - Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
614 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
615 mechanism. In the process, fix a bug where isinstance() and issubclass(),
616 when given a tuple of classes as second argument, were looking up
617 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
620 - Fix crashes on memory allocation failure found with failmalloc.
622 - Fix memory leaks found with valgrind and update suppressions file.
624 - Fix compiler warnings in opt mode which would lead to invalid memory reads.
626 - Fix problem using wrong name in decimal module reported by pychecker.
628 - Silenced another compiler warning about a used but not defined
629 function 'stringlib_contains_obj'.
631 - Added warnings on the use of ``__getslice__``, ``__setslice__``, or
634 - Issue #3678: Correctly pass LDFLAGS and LDLAST to the linker on shared
635 library targets in the Makefile.
637 - Issue #1204: The configure script now tests for additional libraries
638 that may be required when linking against readline. This fixes issues
639 with x86_64 builds on some platforms (a few Linux flavors and OpenBSD).
644 - Aliased PyObject_Bytes to PyObject_Str.
649 - Issue #3640: Pickling a list or a dict uses less local variables, to reduce
650 stack usage in the case of deeply nested objects.
652 - Issue #3629: Fix sre "bytecode" validator for an end case.
654 - Issue #3811: The Unicode database was updated to 5.1.
656 - Issue #3781: Further warnings.catch_warnings() cleanup to prevent
657 silent misbehaviour when a single instance is nested in multiple
658 with statements, or when the methods are invoked in the wrong order.
660 - Issue #3809: Fixed spurious 'test.blah' file left behind by test_logging.
662 - Issue #3781: Clean up the API for warnings.catch_warnings() by having it
663 return a list or None rather than a custom object.
665 - Issue #1638033: Cookie.Morsel gained the httponly attribute.
667 - Issue #3535: zipfile couldn't read some zip files larger than 2GB.
669 - Issue #3776: Deprecate the bsddb package for removal in 3.0.
671 - Issue #3762: platform.architecture() fails if python is lanched via
674 - Issue #3772: Fixed regression problem in StreamHandler.emit().
676 - Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
677 to the urlparse one. Added a PendingDeprecationWarning in the old
678 module, it will be deprecated in the future.
680 - Issue #2562: Fix distutils PKG-INFO writing logic to allow having
681 non-ascii characters and Unicode in setup.py meta-data.
683 - Issue #3726: Allow spaces in separators in logging configuration files.
685 - Issue #3719: platform.architecture() fails if there are spaces in the
686 path to the Python binary.
688 - Issue 3602: Moved test.test_support.catch_warning() to
689 warnings.catch_warnings() along with some API cleanup. Expanding the tests
690 for catch_warnings() also led to an improvement in the raising of a
691 DeprecationWarning related to warnings.warn_explicit().
693 - The deprecation warnings for the old camelCase threading API were removed.
695 - logging: fixed lack of use of encoding attribute specified on a stream.
697 - Silenced a trivial compiler warning in the sqlite module.
699 - Fixed two format strings in the _collections module.
701 - Issue #3703: _fileio.FileIO gave unhelpful error message when trying to open a
704 - Issue #3708: os.urandom no longer goes into an infinite loop when passed a
705 non-integer floating point number.
707 - Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
713 - Issue #4301: Patch the logging module to add processName support, remove
714 _check_logger_class from multiprocessing.
716 - Issue #2975: When compiling several extension modules with Visual Studio 2008
717 from the same python interpreter, some environment variables would grow
720 - Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
721 exploitation of poor argument checking.
723 - sqlite3: Changed docstring of iterdump() to mark method as "Non-standard".
725 - Issue #3103: Reduced globals symbols used by sqlite3 module and made sure all
726 remaining ones have "pysqlite_" prefix.
728 - Issue #3846: Release the GIL during sqlite3_prepare calls. This improves
729 concurrent access to the same SQLite database from multiple
735 - Issue #3781: Add test.test_support.check_warnings() as a convenience
736 wrapper for warnings.catch_warnings() that makes it easier to check
737 that expected warning messages are being reported.
739 - Issue #3796: Some tests functions were not enabled in test_float.
741 - Issue #3768: Move test_py3kwarn over to the new API for catch_warnings().
746 - Issue #3833: Use a different upgrade code for Win64 installers.
748 - Issue #2271: Set SecureCustomProperties so that installation will properly
749 use the TARGETDIR even for unprivileged users.
751 - Allow passing the MSI file name to merge.py.
753 - Issue #3758: Rename the 'check' target to 'patchcheck' so as to not clash
754 with GNU build target guidelines.
757 What's New in Python 2.6 beta 3?
758 ================================
760 *Release date: 20-Aug-2008*
765 - Issue #1878: Remove Py_TPFLAGS_HAVE_VERSION_TAG from
766 Py_TPFLAGS_DEFAULT when not building the core. This means 3rd party
767 extensions do not automatically benefit from the class attribute
768 cache; they will have to explicitly add Py_TPFLAGS_HAVE_VERSION_TAG
769 to their tp_flags field if they care. This is a backwards
770 compatibility feature; in 3.0, all types will use the cache by
773 - Keyword arguments can now follow starred arguments. (``f(a, *args,
774 keyword=23)`` is now valid syntax.)
776 - ctypes function pointers that are COM methods have a boolean True
779 - Issue #3139: Make buffer-interface thread-safe wrt. PyArg_ParseTuple,
780 by denying s# to parse objects that have a releasebuffer procedure,
783 - Issue #3537: Fix an assertion failure when an empty but presized dict
784 object was stored in the freelist.
786 - Issue #1481296: Make long(float('nan')) and int(float('nan')) raise
787 ValueError consistently across platforms.
789 - Issue #3479: On platforms where sizeof(int) is smaller than sizeof(long)
790 (64bit Unix, for example), unichr() would truncate its argument and return
791 u'\x00' for unichr(2**32). Now it properly raises an OverflowError.
793 - Apply security patches from Apple.
795 - Issue #2542: Now that issubclass() may call arbitrary code, ensure that
796 PyErr_ExceptionMatches returns 0 when an exception occurs there.
798 - Issue #1819: function calls with several named parameters are now on
799 average 35% faster (as measured by pybench).
801 - Issue #2378: An unexpected UnboundLocalError or NameError could appear when
802 the python debugger steps into a class statement: the free variables (local
803 variables defined in an outer scope) would be deleted from the outer scope.
805 - Issue #2620: Overflow checking when allocating or reallocating memory
806 was not always being done properly in some python types and extension
807 modules. PyMem_MALLOC, PyMem_REALLOC, PyMem_NEW and PyMem_RESIZE have
808 all been updated to perform better checks and places in the code that
809 would previously leak memory on the error path when such an allocation
810 failed have been fixed.
815 - Issue #3612: Added some missing basic types in ctypes.wintypes.
817 - The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
818 symtable.Symbol have been deprecated for removal in 3.0 and the next release.
820 - Issue #2234: distutils failed for some versions of the cygwin compiler. The
821 version reported by these tools does not necessarily follow the python
822 version numbering scheme, so the module is less strict when parsing it.
824 - Issue #2235: Added Py3k warnings for types which will become unhashable
825 under the stricter __hash__ inheritance rules in 3.0. Several types
826 which did not meet the rules for hash invariants and were already
827 unhashable in 3.0 have now been explicitly flagged as unhashable in
828 2.6 as well (collections.Mapping, collections.Set, unittest.TestSuite,
829 xml.dom.minidom.NamedNodeMap, numbers.Number, UserList.UserList)
831 - Update __all__ for cookielib, csv, os, urllib2, and weakref to include things
832 imported into the module but exposed as part of the module's API.
834 - Remove an unneeded import of abc.ABCMeta from 'inspect'.
836 - Remove unneeded imports of 'sys' and 'warnings' from 'io'.
838 - Remove unneeded imports of 'warnings' from shelve, filecmp, and dummy_thread.
840 - Issue #3575: Incremental decoder's decode function now takes bytearray
841 by using 's*' instead of 't#'.
843 - Issue #2222: Fixed reference leak when occured os.rename()
844 fails unicode conversion on 2nd parameter. (windows only)
846 - Issue 2464. urllib2 now supports a malformation in the URL received
849 - Silence the DeprecationWarning raised when importing mimetools in
850 BaseHTTPServer, cgi (and rfc822), httplib.
852 - Issue #2776: fixed small issue when handling an URL with double slash
853 after a 302 response in the case of not going through a proxy.
855 - Issue #2676: in the email package, content-type parsing was hanging on
856 pathological input because of quadratic or exponential behaviour of a
859 - Issue #3476: binary buffered reading through the new "io" library is now
862 - Silence the DeprecationWarning of rfc822 when it is imported by mimetools
863 since mimetools itself is deprecated. Because modules are cached, all
864 subsequent imports of rfc822 will not raise a visible DeprecationWarning.
866 - Issue #3134: shutil referenced undefined WindowsError symbol.
868 - Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
869 menu entries were not deleted.
871 - Copied the implementation of reduce() to _functools.reduce() to have a
872 version that did not raise a DeprecationWarning under -3.
874 - Issue #3205: When iterating over a BZ2File fails allocating memory, raise
875 a MemoryError rather than silently stop the iteration.
877 - Issue #3487: sre "bytecode" validator. Passing invalid "re-bytecode"
878 to _sre.compile() will now be rejected. This should not affect anybody
879 since the re.compile() function never generates invalid re-bytecode.
881 - Issue #3436: Make csv.DictReader's fieldnames attribute a property so that
882 upon first access it can be automatically initialized from the csv file if
883 it wasn't initialized during instantiation.
885 - Issue #2338: Create imp.reload() to help with transitioning to Python 3.0 as
886 the reload() built-in has been removed.
888 - Changed code in the following modules/packages to remove warnings raised
889 while running under the ``-3`` flag: aifc, asynchat, asyncore, bdb, bsddb,
890 ConfigParser, cookielib, csv, difflib, distutils, DocXMLRPCServer, email,
891 filecmp, fileinput, inspect, logging, modulefinder, pdb, pickle, profile,
892 pstats, pydoc, re, rlcompleter, SimpleXMLRPCServer, shelve, socket,
893 subprocess, sqlite3, tarfile, Tkinter, test.test_support, textwrap,
894 threading, tokenize, traceback, urlparse, wsgiref, xml, xmlrpclib.
896 - Issue #3039: Fix tarfile.TarFileCompat.writestr() which always
897 raised an AttributeError.
899 - Issue #2523: Fix quadratic behaviour when read()ing a binary file without
900 asking for a specific length. This problem only affected files opened
901 using the new "io" module, not the built-in open() function.
903 - Issue #3449: Update decimal module to use most recent specification
904 (v. 1.68) and tests (v. 2.58) from IBM.
906 - Issue 3437: Bug fix in robotparser parsing of Allow: lines.
908 - Issue 1592: Improve error reporting when operations are attempted
911 - Deprecate the "ast" parser function aliases.
913 - Issue #3120: On 64-bit Windows the subprocess module was truncating handles.
915 - Issue #3303: Fix a crash in locale.strcoll() when calling it with
918 - Issue #3302: Fix several crashes when calling locale's gettext functions
921 - Issue #3389: Allow resolving dotted names for handlers in logging
924 - Deprecate the sunaudio module for removal in Python 3.0.
926 - Issue #3394: zipfile.writestr sets external attributes when passed a
927 file name rather than a ZipInfo instance, so files are extracted with
928 mode 0600 rather than 000 under Unix.
930 - Issue #1857: subprocess.Popen.poll gained an additional _deadstate keyword
931 argument in python 2.5, this broke code that subclassed Popen to include its
932 own poll method. Fixed my moving _deadstate to an _internal_poll method.
937 - Generate the PatternGrammar pickle during "make install".
942 - Issue #2235: the C API function PyObject_HashNotImplemented and its
943 interaction with the tp_hash slot (added in 2.6b2) are now documented
945 - Issue #643841: The language reference now provides more detailed
946 coverage of the lookup process for special methods. The disclaimers
947 regarding lack of coverage of new-style classes have also been
948 removed, since the coverage is now fairly reasonable.
951 What's New in Python 2.6 beta 2?
952 ================================
954 *Release date: 17-Jul-2008*
959 - Issue #3156: Fix inconsistent behavior of the bytearray type: all
960 its methods now allow for items objects that can be converted to
961 an integer using operator.index().
963 - Issue #3360: Fix incorrect parsing of '020000000000.0', which
964 produced a ValueError instead of giving the correct float.
966 - Issue #3083: Add alternate (#) formatting for bin, oct, hex output
967 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
969 - Issue #3008: the float type has a new instance method 'float.hex'
970 and a new class method 'float.fromhex' to convert floating-point
971 numbers to and from hexadecimal strings, respectively.
973 - Issue #2235: __hash__ is once again inherited by default. To allow
974 collections.Hashable to remain meaningful in the presence of the
975 default hash implementation (object.__hash__), it is now possible
976 to explicit block inheritance of hash by setting __hash__=None at
977 the Python level, or tp_hash=PyObject_HashNotImplemented at the C
980 - Issue #3221: Issue a RuntimeWarning instead of raising SystemError if
981 the parent module cannot be found while performing an absolute import.
982 This means that an incorrectly defined __package__ attribute will
983 now only prevent relative imports in that module rather than causing
984 all imports from that module to fail.
986 - Issue #2517: Allow unicode messages in Exceptions again by correctly
987 bypassing the instance dictionary when looking up __unicode__ on
990 - Issue #3242: Fix a crash inside the print statement, if sys.stdout is
991 set to a custom object whose write() method happens to install
992 another file in sys.stdout.
994 - Issue #3088: Corrected a race condition in classes derived from
995 threading.local: the first member set by a thread could be saved in
996 another thread's dictionary.
998 - Issue #3004: Minor change to slice.indices(): the start and stop
999 arguments are now treated identically, making the behaviour easier
1000 to describe and understand. For example, slice(None, -10,
1001 1).indices(9) now returns (0, 0, 1) instead of (0, -1, 1), and
1002 slice(None, 10, -1).indices(10) returns (9, 9, -1) instead of (9,
1005 - Issue #3219: Calling a function with repeated keyword arguments,
1006 f(a=2, a=23), would not cause a syntax error. This was a regression
1007 from 2.4 caused by the switch to the new compiler.
1009 - Issue #2862: Make int and float freelist management consistent with
1010 other freelists. Changes their CompactFreeList apis into
1011 ClearFreeList apis and calls them via gc.collect().
1016 - Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
1017 api functions without holding the GIL, which could lead to a fatal
1018 error when they failed.
1020 - Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
1022 - Issue #3395: fix reference in test_multiprocessing to old debugInfo method
1024 - Issue #3312: Fix two crashes in sqlite3.
1026 - Issue #1608818: Fix misbehavior in os.listdir() if readdir() fails.
1028 - Issue #3125: Remove copy_reg in multiprocessing and replace it with
1029 ForkingPickler.register() to resolve conflict with ctypes.
1031 - Issue #3090: Fixed ARCHFLAGS parsing on OS/X
1033 - Issue #3313: Fixed a crash when a failed dlopen() call does not set
1034 a valid dlerror() message.
1036 - Issue #3258: Fixed a crash when a ctypes POINTER type to an
1037 incomplete structure was created.
1039 - Issue #3339: dummy_thread.acquire() should not return None.
1041 - Issue #3285: Fractions from_float() and from_decimal() accept Integral arguments.
1043 - Issue #3301: Bisect module behaved badly when lo was negative.
1045 - Issue #839496: SimpleHTTPServer used to open text files in text mode. This is
1046 both unnecessary (HTTP allows text content to be sent in several forms) and
1047 wrong because the actual transmitted size could differ from the
1048 content-length. The problem had been corrected in the 2.4 branch, but never
1051 - Issue #2663: add filtering capability to shutil.copytree().
1053 - Issue #1622: Correct interpretation of various ZIP header fields.
1055 - Issue #1526: Allow more than 64k files to be added to Zip64 file.
1057 - Issue #1746: Correct handling of zipfile archive comments (previously
1058 archives with comments over 4k were flagged as invalid). Allow writing
1059 Zip files with archives by setting the 'comment' attribute of a ZipFile.
1061 - Issue #449227: The rlcompleter module now adds "(" to callable objects
1064 - Issue #3190: Pydoc now hides the automatic module attribute __package__ (the
1065 handling is now the same as that of other special attributes like __name__).
1067 - Issue #2885 (partial): The urllib.urlopen() function has been deprecated for
1068 removal in Python 3.0 in favor of urllib2.urlopen().
1070 - Issue #2113: Fix error in subprocess.Popen if the select system call is
1071 interrupted by a signal.
1073 - Issue #3309: Fix bz2.BZFile iterator to release its internal lock
1074 properly when raising an exception due to the bz2file being closed.
1075 Prevents a deadlock.
1077 - Issue #3094: httplib.HTTPSConnection Host: headers no longer include the
1078 redundant ":443" port number designation when the connection is using the
1079 default https port (443).
1081 - Issue #874900: after an os.fork() call the threading module state is cleaned
1082 up in the child process to prevent deadlock and report proper thread counts
1083 if the new process uses the threading module.
1088 - test.test_support.catch_warning now keeps track of all warnings it sees
1089 and is now better documented. Explicit unit tests for this context manager
1090 have been added to test_warnings.
1095 - Issue #3215: Build sqlite3 as sqlite3.dll, not sqlite3.pyd.
1101 - Document that robotparser has been renamed to urllib.robotparser in
1104 - Document that urlparse has been renamed to urllib.parse in Python 3.0.
1106 - Document that urllib2 is split across multiple modules and renamed in
1109 - Document that urllib is split across multiple modules and renamed in
1113 What's New in Python 2.6 beta 1?
1114 ================================
1116 *Release date: 18-June-2008*
1121 - Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
1122 argument being anything other than a dict or None. Also fixed a bug in error
1123 handling when 'message' and 'category' were both set to None, triggering a
1126 - Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
1127 holds the last (strong) reference to its referent.
1129 - Add future_builtins.ascii().
1131 - Several set methods now accept multiple arguments: update(), union(),
1132 intersection(), intersection_update(), difference(), and difference_update().
1134 - Issue #2898: Added sys.getsizeof() to retrieve size of objects in bytes.
1136 - New environment variable PYTHONIOENCODING.
1138 - Patch #2488: Add sys.maxsize.
1140 - Issue #2353: file.xreadlines() now emits a Py3k warning.
1142 - Issue #2863: generators now have a ``gen.__name__`` attribute that
1143 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
1144 ``func.func_code.co_name``. The repr() of a generator now also
1147 - Issue #2831: enumerate() now has a ``start`` argument.
1149 - Issue #2801: fix bug in the float.is_integer method where a
1150 ValueError was sometimes incorrectly raised.
1152 - Issue #2790: sys.flags was not properly exposing its bytes_warning
1155 - Issue #2196: hasattr() now lets exceptions which do not inherit
1156 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
1159 - Added checks for integer overflows, contributed by Google. Some are
1160 only available if asserts are left in the code, in cases where they
1161 can't be triggered from Python code.
1166 - Issue #1179: [CVE-2007-4965] Integer overflow in imageop module.
1168 - Issue #3116: marshal.dumps() had quadratic behavior for strings > 32Mb.
1170 - Issue #2138: Add factorial() to the math module.
1172 - The heapq module does comparisons using LT instead of LE. This
1173 makes its implementation match that used by list.sort().
1175 - Issue #2819: add full-precision summation function to math module,
1176 based on Hettinger's ASPN Python Cookbook recipe.
1178 - Issue #2592: delegate nb_index and the floor/truediv slots in
1181 - Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
1184 - Support for Windows 9x has been removed from the winsound module.
1186 - bsddb module updated to version 4.7.3.
1187 http://www.jcea.es/programacion/pybsddb.htm#bsddb3-4.7.3. This
1188 code should be compatible with Python 3.0.
1190 - Issue #2858: Fix potential memory corruption when
1191 bsddb.db.DBEnv.lock_get and other bsddb.db object constructors
1192 raised an exception.
1194 - Issue #2669: bsddb/__init__.py iteration no longer silently fails when
1195 the database has changed size during iteration. It now raises a
1196 RuntimeError in the same manner as a dictionary.
1198 - Issue #2870: cmathmodule.c compile error.
1200 - Added a threading.Thread.ident property.
1205 - logging.config: Removed out-of-date comment in _install_handlers and
1206 used issubclass in place of equality comparison of classes.
1208 - Issue #2722: Now the os.getcwd() supports very long path names.
1210 - Issue #2888: Fixed the behaviour of pprint when working with nested
1211 structures, to match the behaviour of 2.5 and 3.0 (now follows the common
1214 - Issue #1817: cgi now correctly handles the querystring on POST requests
1216 - Issue #3136: fileConfig()'s disabling of old loggers is now conditional via
1217 an optional disable_existing_loggers parameter, but the default value is
1218 such that the old behaviour is preserved. Thanks to Leandro Lucarella for
1221 - Issue #3126: StreamHandler and FileHandler check before calling "flush" and
1222 "close" that the stream object has these, using hasattr (thanks to bobf for
1225 - Issue #2912: platform.uname now tries to determine unknown information even if
1228 - The rfc822 module has been deprecated for removal in 3.0.
1230 - The mimetools module has been deprecated for removal in 3.0.
1232 - The ctypes.byref function now takes an optional second parameter
1233 which allows to specify an offset in bytes for the constructed
1234 pointer-like object.
1236 - Added the ast module.
1238 - Added the multiprocessing module, PEP 371.
1240 - Factored out the indentation cleaning from inspect.getdoc() into
1241 inspect.cleandoc() to ease standalone use.
1243 - Issue #1798: Add ctypes calling convention that allows safe access
1246 - Issue #2404: ctypes objects support the new pep3118 buffer interface.
1248 - Patch #2125: Add GetInteger and GetString methods for
1249 msilib.Record objects.
1251 - Issue #2782: The datetime module's strftime methods now accept
1252 unicode format strings just as time.strftime always has.
1254 - The sgmllib and htmllib modules have been deprecated for removal
1257 - Issue #3011: locale module alias table was updated to the latest
1258 version from the X.org locale.alias file.
1260 - Issue #1797 (partial fix): ctypes NULL function pointers have a
1261 False boolean value now.
1263 - Issue #2985: Allow 64-bit integer responses (``<i8>``) in XMLRPC
1266 - Issue #2877: The UserString.MutableString class has been removed in
1269 - Do not close external file objects passed to tarfile.open(mode='w:bz2')
1270 when the TarFile is closed.
1272 - Issue #2959: For consistency with other file-like objects, gzip's
1273 GzipFile.close() can now be called multiple times without raising
1276 - Issue #1390: Raise ValueError in toxml when an invalid comment would
1277 otherwise be produced.
1279 - Issue #2914: TimedRotatingFileHandler now takes an optional keyword
1280 argument "utc" to use UTC time rather than local time.
1282 - Issue #2929: TimedRotatingFileHandler was using the wrong path when
1283 deleting old log files (filename only instead of full path).
1285 - Issue #1775025: You can now specify zipfile members to open(),
1286 read() or extract() via a ZipInfo instance. This allows handling
1287 duplicate filenames in zipfiles.
1289 - Issue #961805: Fix Text.edit_modified() in Tkinter.
1291 - Issue #1793: Function ctypes.util.find_msvcrt() added that returns
1292 the name of the C runtime library that Python uses.
1293 ctypes.util.find_library(name) now call this function when name is
1296 - The statvfs module has been deprecated for removal in Python 3.0.
1298 - The sunaudiodev and SUNAUDIODEV modules have been deprecated for
1299 removal in Python 3.0.
1301 - The WAIT module from IRIX has been deprecated for removal in Python
1304 - The torgb module from IRIX has been deprecated for removal in Python
1307 - The SV module from IRIX has been deprecated for removal in Python
1310 - The readcd module from IRIX has been deprecated for removal in
1313 - The panelparser module from IRIX has been deprecated for removal in
1316 - The panel module from IRIX has been deprecated for removal in Python
1319 - The jpeg module from IRIX has been deprecated for removal in Python
1322 - The IOCTL module from IRIX has been deprecated for removal in Python
1325 - The IN module from IRIX has been deprecated for removal in Python
1328 - The imgfile module from IRIX has been deprecated for removal in
1331 - The GLWS module from IRIX has been deprecated for removal in Python
1334 - The GET module from IRIX has been deprecated for removal in Python
1337 - The fm module from IRIX has been deprecated for removal in Python
1340 - The FL, flp, and fl modules from IRIX have been deprecated for
1341 removal in Python 3.0.
1343 - The FILE module on IRIX has been deprecated for removal in Python
1346 - The ERRNO module on IRIX has been deprecated for removal in Python
1349 - The DEVICE, GL, gl, and cgen modules (which indirectly includes
1350 cgensupport) have been deprecated for removal in Python 3.0.
1352 - The CL, CL_old, and cl modules for IRIX have been deprecated for
1353 removal in Python 3.0.
1355 - The cdplayer module for IRIX has been deprecated for removal in
1358 - The cddb module for IRIX has been deprecated for removal in Python
1361 - The cd and CD modules for IRIX have been deprecated for removal in
1364 - The al and AL modules for IRIX have been deprecated for removal in
1367 - Issue #1713041: fix pprint's handling of maximum depth.
1369 - The timing module has been deprecated for removal in Python 3.0.
1371 - The sv module has been deprecated for removal in Python 3.0.
1373 - The multifile module has been deprecated as per PEP 4.
1375 - The imageop module has been deprecated for removal in Python 3.0.
1377 - Issue #2250: Exceptions raised during evaluation of names in
1378 rlcompleter's ``Completer.complete()`` method are now caught and
1381 - Issue #2659: Added ``break_on_hyphens`` option to textwrap
1384 - The mhlib module has been deprecated for removal in Python 3.0.
1386 - The linuxaudiodev module has been deprecated for removal in Python
1389 - The ihooks module has been deprecated for removal in Python 3.0.
1391 - The fpformat module has been deprecated for removal in Python 3.0.
1393 - The dl module has been deprecated for removal in Python 3.0.
1395 - The Canvas module has been deprecated for removal in Python 3.0.
1397 - The compiler package has been deprecated for removal in Python 3.0.
1399 - The Bastion and rexec modules have been deprecated for removal in
1402 - The bsddb185 module has been deprecated for removal in Python 3.0.
1404 - The pure module has been deprecated for removal in Python 3.0.
1406 - Issue #2487: change the semantics of math.ldexp(x, n) when n is too
1407 large to fit in a C long. ldexp(x, n) now returns a zero (with
1408 suitable sign) if n is large and negative; previously, it raised
1411 - The toaiff module has been deprecated for removal in Python 3.0.
1413 - The test.testall module has been deprecated for removal in Python
1416 - The new module has been deprecated for removal in Python 3.0.
1418 - The user module has been deprecated for removal in Python 3.0.
1420 - The stringold module has been deprecated for removal in Python 3.0.
1422 - The mutex module has been deprecated for removal in Python 3.0.
1424 - The imputil module has been deprecated for removal in Python 3.0.
1426 - test.test_support.catch_warning() gained a 'record' argument.
1428 - os.path.walk is deprecated in favor of os.walk.
1430 - pdb gained the "until" command.
1432 - The Mac Modules (including Carbon) have been deprecated for removal
1435 - Library: on MacOS X you can now set ``ARCHFLAGS`` in the shell
1436 environment to control the '-arch' flags that are used to build
1437 an extension. This was added for compatibility with Apple's build
1440 - The bundled OSX-specific copy of libbffi is now in sync with the version
1441 shipped with PyObjC 2.0 and includes support for x86_64 and ppc64 platforms.
1443 - The threading module gained aliases for names that will be removed in the
1449 - The Windows installer now includes Tk 8.5, bzip2 1.0.5, and SQLite 3.5.9.
1451 - Patch #1722225: Support QNX 6.
1453 - ``Lib/lib-old`` is now added to sys.path.
1455 - On MacOS X it is now possible to install the framework in 64-bit
1456 mode or even as a 4-way universal binary (that is, PPC, i386,
1457 PPC64 and x86_64 support in one binary).
1459 This is controlled by the configure argument ``--with-universal-archs``:
1461 - ``--with-universal-archs=all``: install 4-way universal
1463 - ``--with-universal-archs=32-bit``: install 2-way universal, 32-bit (the default)
1465 - ``--with-universal-archs=64-bit``: install 2-way universal, 64-bit
1467 This option should be used in combination with ``--enable-universalsdk=``.
1469 NOTE: 64-bit and 4-way builds are only suppported on Mac OS X 10.5 (or later).
1475 - Add ``PyType_Modified()`` as a public API to clear the type cache.
1477 - The PyBytes functions have been renamed to PyByteArray.
1479 - The PyString functions have been renamed to PyBytes. A batch of
1480 defines were added so that the linker still sees the original
1484 What's New in Python 2.6 alpha 3?
1485 =================================
1487 *Release date: 08-May-2008*
1492 - Issue #2719: backported the ``next()`` builtin from Python 3.
1494 - Issue #2681: The octal literal ``0o8`` was incorrecly acctepted. Now
1495 it properly raises a SyntaxError.
1497 - Issue #2617: Reserved -J and -X arguments for Jython, IronPython and
1498 other implementations of Python.
1500 - Implemented PEP 370: Per user site-packages directory.
1505 - Issue #2670: Fix a failure in urllib2.build_opener(), when passed
1506 two handlers that derive the same default base class.
1508 - Added kill, terminate and send_signal(sig) to subprocess.Popen.
1510 - Added phase(z) -> phi, polar(z) -> r, phi and rect(r, phi) -> z to
1513 - Four new methods were added to the math and cmath modules: acosh,
1514 asinh, atanh and log1p.
1516 - zlib.decompressobj().flush(value) no longer crashes the interpreter
1517 when passed a value less than or equal to zero.
1519 - Issue #1631171: Re-implement the 'warnings' module in C (the
1520 original Python code has been kept as backup). This will allow for
1521 using the 'warning's machinery in such places as the parser where
1522 use of pure Python code is not possible. Both the ``showarning()``
1523 and ``formatwarning()`` gain an optional 'line' argument which is
1524 not called by default for backwards-compatibility reasons. Setting
1525 ``warnings.showwarning()`` to an implementation that lacks support
1526 for the ``line`` argument will raise a DeprecationWarning.
1531 - The audiodev module has been deprecated for removal in Python 3.0.
1533 - Issue #2750: Add the 'json' package. Based on simplejson 1.9 and
1534 contributed by Bob Ippolito.
1536 - Issue #1734346: Support Unicode file names for zipfiles.
1538 - Issue #2581: distutils: Vista UAC/elevation support for
1541 - Issue #2635: Fix bug in 'fix_sentence_endings' textwrap.fill option,
1542 where an extra space was added after a word containing (but not
1543 ending in) '.', '!' or '?'.
1545 - Add from_buffer() and from_buffer_copy() class methods to ctypes
1548 - Issue #2682: ctypes callback functions no longer contain a cyclic
1549 reference to themselves.
1551 - The getpass module has been improved on Unix. It now uses /dev/tty
1552 by default and uses stderr instead of stdout. A GetPassWarning is
1553 issued when input echo cannot be controlled.
1555 - Issue #2014: Allow XML-RPC datetime objects to have dates before
1558 - Issue #2439: Added new function pkgutil.get_data(), which is a
1559 convenience wrapper for the PEP 302 get_data() API.
1561 - Issue #2616: The ctypes.pointer() and ctypes.POINTER() functions are
1562 now implemented in C for better performance.
1564 - Issue #2408: The ``_types`` module, which was used as in
1565 implementation detail of the public ``types`` module, has been
1566 removed and replaced by pure python code.
1568 - Issue #2513: distutils on Windows is now capable of cross-compiling
1569 extension modules between 32 and 64 bit platforms. See the distutls
1570 build documentation for more information.
1572 - Issue #815646: Individual file objects may now be used from multiple
1573 threads at once without fear of crashing the Python interpreter. If
1574 file.close() is called while an object is in use by another thread
1575 an IOError exception will be raised and the file will not be closed.
1577 - The bundled libffi copy is now in sync with the recently released
1578 libffi3.0.5 version, apart from some small changes to
1579 Modules/_ctypes/libffi/configure.ac.
1581 - Issue #2385: distutils.core.run_script() makes __file__ available,
1582 so the controlled environment will more closely mirror the typical
1583 script environment. This supports setup.py scripts that refer to
1589 - Issue #2550: The approach used by client/server code for obtaining
1590 ports to listen on in network-oriented tests has been refined in an
1591 effort to facilitate running multiple instances of the entire
1592 regression test suite in parallel without issue.
1593 test_support.bind_port() has been fixed such that it will always
1594 return a unique port -- which wasn't always the case with the
1595 previous implementation, especially if socket options had been set
1596 that affected address reuse (i.e. SO_REUSEADDR, SO_REUSEPORT). The
1597 new implementation of bind_port() will actually raise an exception
1598 if it is passed an AF_INET/SOCK_STREAM socket with either the
1599 SO_REUSEADDR or SO_REUSEPORT socket option set. Furthermore, if
1600 available, bind_port() will set the SO_EXCLUSIVEADDRUSE option on
1601 the socket it's been passed. This currently only applies to
1602 Windows. This option prevents any other sockets from binding to the
1603 host/port we've bound to, thus removing the possibility of the
1604 'non-deterministic' behaviour, as Microsoft puts it, that occurs
1605 when a second SOCK_STREAM socket binds and accepts to a host/port
1606 that's already been bound by another socket. The optional preferred
1607 port parameter to bind_port() has been removed. Under no
1608 circumstances should tests be hard coding ports!
1610 test_support.find_unused_port() has also been introduced, which will
1611 pass a temporary socket object to bind_port() in order to obtain an
1612 unused port. The temporary socket object is then closed and
1613 deleted, and the port is returned. This method should only be used
1614 for obtaining an unused port in order to pass to an external program
1615 (i.e. the -accept [port] argument to openssl's s_server mode) or as
1616 a parameter to a server-oriented class that doesn't give you direct
1617 access to the underlying socket used.
1619 Finally, test_support.HOST has been introduced, which should be used
1620 for the host argument of any relevant socket calls (i.e. bind and
1623 The following tests were updated to following the new conventions:
1624 test_socket, test_smtplib, test_asyncore, test_ssl, test_httplib,
1625 test_poplib, test_ftplib, test_telnetlib, test_socketserver,
1626 test_asynchat and test_socket_ssl.
1628 It is now possible for multiple instances of the regression test
1629 suite to run in parallel without issue.
1634 - Issue #1496032: On alpha, use -mieee when gcc is the compiler.
1636 - Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
1637 gcc is used as compiler.
1639 - Issue #2573: On MacOS X it is now possible to install the framework
1640 with a different name using --with-framework-name=NAME.
1645 - Added implementation of copysign, acosh, asinh, atanh and log1p to
1646 the new files Include/pymath.h and Python/pymath.h for platforms
1647 which provide the functions through their libm. The files also
1648 contains several helpers and constants for math.
1650 - Added a new convenience macro, PyErr_WarnPy3k, for issuing Py3k warnings.
1653 What's New in Python 2.6 alpha 2?
1654 =================================
1656 *Release date: 02-Apr-2008*
1661 - Issue #1733757: The interpreter would hang on shutdown if the
1662 tracing function set by sys.settrace is still active and happens to
1663 call threading.currentThread().
1665 - Patch #1442: properly report exceptions when the PYTHONSTARTUP file
1668 - The compilation of a class nested in another class used to leak one
1669 reference on the outer class name.
1671 - Patch #1810: compile() can now compile _ast trees as returned by
1672 ``compile(..., PyCF_ONLY_AST)``.
1674 - Patch #2426: Added sqlite3.Connection.iterdump method to allow easy
1675 dumping of databases. Contributed by Paul Kippes at PyCon 2008.
1677 - Patch #2477: Added from __future__ import unicode_literals.
1679 - Added backport of bytearray type.
1681 - Issue #2355: add Py3k warning for buffer().
1683 - Issue #1477: With narrow Unicode builds, the unicode escape sequence
1684 \Uxxxxxxxx did not accept values outside the Basic Multilingual
1685 Plane. This affected raw unicode literals and the
1686 'raw-unicode-escape' codec. Now UTF-16 surrogates are generated in
1687 this case, like normal unicode literals and the 'unicode-escape'
1690 - Issue #2348: add Py3k warning for file.softspace.
1692 - Issue #2346/#2347: add Py3k warnings for __methods__ and
1695 - Issue #2358: Add a Py3k warning on sys.exc_clear() usage.
1697 - Issue #2400: Allow relative imports to "import *".
1699 - Issue #1745: Backport print function with ``from __future__ import
1702 - Issue #2332: add new attribute names for instance method objects.
1703 The two changes are: im_self -> __self__ and im_func -> __func__
1705 - Issue #2379: Raise a Py3K warning for __getitem__ or __getslice__ on
1706 exception instances.
1708 - Issue #2371: Add a Py3k warning when catching an exception that
1709 doesn't derive from BaseException.
1711 - Issue #2341: Add a Py3k warning when raising an exception that
1712 doesn't derive from BaseException.
1714 - Issue #2321: use pymalloc for unicode object string data to reduce
1715 memory usage in some circumstances.
1717 - PEP 3127: octal literals now start with "0o". Old-style octal
1718 literals are still valid. There are binary literals with a prefix of
1719 "0b". This also affects int(x, 0).
1721 - Issue #2359: Adding deprecation warnings for array.{read,write}.
1723 - Issue #1779871: GNU gcc can now build Python on OS X because the
1724 flags -Wno-long-double, -no-cpp-precomp, and -mno-fused-madd are no
1727 - Add a warning when asserting a non-empty tuple which is always true.
1729 - Issue #2179: speed up with statement execution by storing the exit
1730 method on the stack instead of in a temporary variable (patch by
1733 - Issue #2238: Some syntax errors in *args and **kwargs expressions
1734 could give bogus error messages.
1736 - Issue #2143: Fix embedded readline() hang on SSL socket EOF.
1741 - Patch #2240: Implement signal.setitimer and signal.getitimer.
1746 - Issue #2315: logging.handlers: TimedRotatingFileHandler now accounts
1747 for daylight savings time in calculating the next rollover.
1749 - Issue #2316: logging.handlers: TimedRotatingFileHandler now
1750 calculates rollovers correctly even when nothing is logged for a
1753 - Issue #2317: logging.handlers: TimedRotatingFileHandler now uses
1754 improved logic for removing old files.
1756 - Issue #2495: tokenize.untokenize now inserts a space between two
1757 consecutive string literals; previously, ["" ""] was rendered as
1758 [""""], which is incorrect python code.
1760 - Issue #2248: return the result of the QUIT command. from
1763 - Backport of Python 3.0's io module.
1765 - Issue #2482: Make sure that the coefficient of a Decimal is always
1766 stored as a str instance, not as a unicode instance. This ensures
1767 that str(Decimal) is always an instance of str.
1769 - Issue #2478: fix failure of decimal.Decimal(0).sqrt()
1771 - Issue #2432: give DictReader the dialect and line_num attributes
1772 advertised in the docs.
1774 - Issue #2460: Make Ellipsis object copyable.
1776 - Issue #1681432: Add triangular distribution to the random module
1778 - Issue #2136: urllib2's auth handler now allows single-quoted realms
1779 in the WWW-Authenticate header.
1781 - Issue #2434: Enhanced platform.win32_ver() to also work on Python
1782 installation which do not have the win32all package installed.
1784 - Added support to platform.uname() to also report the machine and
1785 processor information on Windows XP and later. As a result,
1786 platform.machine() and platform.processor() will report this
1787 information as well.
1789 - The library implementing the 2to3 conversion, lib2to3, was added to
1790 the standard distribution.
1792 - Issue #1747858: Fix chown to work with large uid's and gid's on
1795 - Issue #1202: zlib.crc32 and zlib.adler32 no longer return different
1796 values on 32-bit vs. 64-bit python interpreters. Both were correct,
1797 but they now both return a signed integer object for consistency.
1799 - Issue #1158: add %f format (fractions of a second represented as
1800 microseconds) to datetime objects. Understood by both strptime and
1803 - Issue #705836: struct.pack(">f", x) now raises OverflowError on all
1804 platforms when x is too large to fit into an IEEE 754 float;
1805 previously it only raised OverflowError on non IEEE 754 platforms.
1807 - Issues #2166, #1741 and #1531505: now distutils deals with HOME
1808 correctly under win32
1810 - Patch #1858: distutils: added multiple server support in .pypirc
1812 - Issue #1106316: pdb.post_mortem()'s parameter, "traceback", is now
1813 optional: it defaults to the traceback of the exception that is
1814 currently being handled (is mandatory to be in the middle of an
1815 exception, otherwise it raises ValueError).
1817 - Issue #1193577: A .shutdown() method has been added to SocketServers
1818 which terminates the .serve_forever() loop.
1820 - Issue #2220: handle rlcompleter attribute match failure more
1823 - Issue #2225: py_compile, when executed as a script, now returns a
1824 non- zero status code if not all files could be compiled
1827 - Bug #1725737: In distutils' sdist, exclude RCS, CVS etc. also in the
1828 root directory, and also exclude .hg, .git, .bzr, and _darcs.
1830 - Issue #1872: The struct module typecode for _Bool has been changed
1833 - The bundled libffi copy is now in sync with the recently released
1834 libffi3.0.4 version, apart from some small changes to
1835 Modules/_ctypes/libffi/configure.ac. On OS X, preconfigured libffi
1836 files are used. On all linux systems the --with-system-ffi
1837 configure option defaults to "yes".
1839 - Issue #1577: shutil.move() now calls os.rename() if the destination
1840 is a directory instead of copying-then-remove-source.
1845 - test_nis no longer fails when test.test_support.verbose is true and
1846 NIS is not set up on the testing machine.
1848 - Output comparison tests are no longer supported.
1850 - Rewrite test_errno to use unittest and no longer be a no-op.
1852 - GHOP 234: Convert test_extcall to doctest.
1854 - GHOP 290: Convert test_dbm and test_dummy_threading to unittest.
1856 - GHOP 293: Convert test_strftime, test_getargs, and test_pep247 to
1859 - Issue #2055: Convert test_fcntl to unittest.
1861 - Issue 1960: Convert test_gdbm to unittest.
1863 - GHOP 294: Convert test_contains, test_crypt, and test_select to
1866 - GHOP 238: Convert test_tokenize to use doctest.
1868 - GHOP 237: Rewrite test_thread using unittest.
1870 - Patch #2232: os.tmpfile might fail on Windows if the user has no
1871 permission to create files in the root directory.
1876 - A new script 2to3 is now installed, to run the 2.x to 3.x converter.
1878 - Python/memmove.c and Python/strerror.c have been removed; both
1879 functions are in the C89 standard library.
1881 - Patch #2284: Add -x64 option to rt.bat.
1886 - Patch #2477: Added PyParser_ParseFileFlagsEx() and
1887 PyParser_ParseStringFlagsFilenameEx().
1890 What's New in Python 2.6 alpha 1?
1891 =================================
1893 *Release date: 29-Feb-2008*
1898 - Issue #2051: pyc and pyo files are no longer created with permission
1899 644. The mode is now inherited from the py file.
1901 - Issue #2067: file.__exit__() now calls subclasses' close() method.
1903 - Patch #1759: Backport of PEP 3129 class decorators.
1905 - Issue #1881: An internal parser limit has been increased. Also see
1906 issue 215555 for a discussion.
1908 - Added the future_builtins module, which contains hex() and oct().
1909 These are the PEP 3127 version of these functions, designed to be
1910 compatible with the hex() and oct() builtins from Python 3.0. They
1911 differ slightly in their output formats from the existing, unchanged
1912 Python 2.6 builtins. The expected usage of the future_builtins
1914 from future_builtins import hex, oct
1916 - Issue #1600: Modifed PyOS_ascii_formatd to use at most 2 digit
1917 exponents for exponents with absolute value < 100. Follows C99
1918 standard. This is a change on Windows, which would use 3 digits.
1919 Also, added 'n' to the formats that PyOS_ascii_formatd understands,
1920 so that any alterations it does to the resulting string will be
1921 available in stringlib/formatter.h (for float.__format__).
1923 - Implemented PEP 3101, Advanced String Formatting. This adds a new
1924 builtin format(); a format() method for str and unicode; a
1925 __format__() method to object, str, unicode, int, long, float, and
1926 datetime; the class string.Formatter; and the C API
1929 - Fixed several potential crashes, all caused by specially crafted
1930 __del__ methods exploiting objects in temporarily inconsistent
1933 - Issue #2115: Important speedup in setting __slot__ attributes. Also
1934 prevent a possible crash: an Abstract Base Class would try to access
1935 a slot on a registered virtual subclass.
1937 - Fixed repr() and str() of complex numbers with infinity or nan as
1938 real or imaginary part.
1940 - Clear all free lists during a gc.collect() of the highest generation
1941 in order to allow pymalloc to free more arenas. Python may give back
1942 memory to the OS earlier.
1944 - Issue #2045: Fix an infinite recursion triggered when printing a
1945 subclass of collections.defaultdict, if its default_factory is set
1948 - Fixed a minor memory leak in dictobject.c. The content of the free
1949 list was not freed on interpreter shutdown.
1951 - Limit free list of method and builtin function objects to 256
1954 - Patch #1953: Added ``sys._compact_freelists()`` and the C API
1955 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
1956 to compact the internal free lists of pre-allocted ints and floats.
1958 - Issue #1983: Fixed return type of fork(), fork1() and forkpty()
1959 calls. Python expected the return type int but the fork familie
1962 - Issue #1678380: Fix a bug that identifies 0j and -0j when they
1963 appear in the same code unit.
1965 - Issue #2025: Add tuple.count() and tuple.index() methods to comply
1966 with the collections.Sequence API.
1968 - Patch #1970 by Antoine Pitrou: Speedup unicode whitespace and
1971 - Added ``PyType_ClearCache()`` and ``sys._clear_type_cache`` to clear
1972 the internal lookup cache for ref leak tests.
1974 - Patch #1473257: generator objects gain a gi_code attribute. This is
1975 the same object as the func_code attribute of the function that
1976 produced the generator.
1978 - Issue #1920: "while 0" statements were completely removed by the
1979 compiler, even in the presence of an "else" clause, which is
1980 supposed to be run when the condition is false. Now the compiler
1981 correctly emits bytecode for the "else" suite.
1983 - A few crashers fixed: weakref_in_del.py (issue #1377858);
1984 loosing_dict_ref.py (issue #1303614, test67.py);
1985 borrowed_ref_[34].py (not in tracker).
1987 - Issue #1069410: The "can't load dll" message box on Windows is
1988 suppressed while an extension is loaded by calling SetErrorMode in
1989 dynload_win.c. The error is still reported properly.
1991 - Issue #1915: Python compiles with --enable-unicode=no again. However
1992 several extension methods and modules do not work without unicode
1995 - Issue #1882: when compiling code from a string, encoding cookies in the
1996 second line of code were not always recognized correctly.
1998 - Issue #1679: "0x" was taken as a valid integer literal.
2000 - Issue #1865: ``bytes`` as an alias for ``str`` and b"" as an alias "" were
2003 - sys.float_info / PyFloat_GetInfo: The floating point information
2004 object was converted from a dict to a specialized structseq object.
2006 - Patch #1816: Added sys.flags structseq. It exposes the status of
2007 most command line arguments and PYTHON* environment variables.
2009 - Objects/structseq.c: Implemented new structseq representation. The
2010 patch makes structseqs (e.g. the return value of os.stat) more
2013 - Patch #1700288: added a type attribute cache that caches method
2014 accesses, resulting in speedups in heavily object-oriented code.
2016 - Bug #1776: __import__() no longer accepts filenames on any platform.
2017 The first parameter to __import__() must be a valid module name.
2019 - Patch #1668: renamed THREADDEBUG envvar to PYTHONTHREADDEBUG.
2021 - Patch #602345: Add -B command line option, PYTHONDONTWRITEBYTECODE
2022 envvar and sys.dont_write_bytecode attribute. All these can be set
2023 to forbid Python to attempt to write compiled bytecode files.
2025 - Improve some exception messages when Windows fails to load an
2026 extension module. Now we get for example '%1 is not a valid Win32
2027 application' instead of 'error code 193'.
2029 - Bug #1481296: Fixed long(float('nan')) != 0L.
2031 - Issue #1640: Added math.isinf(x), math.isnan(x) and math.copysign(x,
2034 - Issue #1635: Platform independent creation and representation of NaN
2035 and INF. float("nan"), float("inf") and float("-inf") now work on
2036 every platform with IEEE 754 semantics.
2038 - Compiler now generates simpler and faster code for dictionary
2039 literals. The oparg for BUILD_MAP now indicates an estimated
2040 dictionary size. There is a new opcode, STORE_MAP, for adding
2041 entries to the dictionary.
2043 - Issue #1638: %zd configure test fails on Linux.
2045 - Issue #1620: New property decorator syntax was modifying the
2046 decorator in place instead of creating a new decorator object.
2048 - Issue #1538: Avoid copying string in split/rsplit if the split char
2051 - Issue #1553: An erroneous __length_hint__ can make list() raise a
2054 - PEP 366: Allow explicit relative imports when executing modules
2055 inside packages with the -m switch via a new module level
2056 __package__ attribute.
2058 - Issue #1402: Fix a crash on exit, when another thread is still
2059 running, and if the deallocation of its frames somehow calls the
2060 PyGILState_Ensure() / PyGILState_Release() functions.
2062 - Expose the Py_Py3kWarningFlag as sys.py3kwarning.
2064 - Issue #1445: Fix a SystemError when accessing the ``cell_contents``
2065 attribute of an empty cell object.
2067 - Issue #1460: The utf-7 incremental decoder did not accept truncated
2068 input. It now correctly saves its state between chunks of data.
2070 - Patch #1739468: Directories and zipfiles containing a __main__.py
2071 file can now be directly executed by passing their name to the
2072 interpreter. The directory/zipfile is automatically inserted as the
2073 first entry in sys.path.
2075 - Issue #1265: Fix a problem with sys.settrace, if the tracing
2076 function uses a generator expression when at the same time the
2077 executed code is closing a paused generator.
2079 - sets and frozensets now have an isdisjoint() method.
2081 - optimize the performance of builtin.sum().
2083 - Fix warnings found by the new version of the Coverity checker.
2085 - The enumerate() builtin function is no longer bounded to sequences
2086 smaller than LONG_MAX. Formerly, it raised an OverflowError. Now,
2087 automatically shifts from ints to longs.
2089 - Issue #1686386: Tuple's tp_repr did not take into account the
2090 possibility of having a self-referential tuple, which is possible
2091 from C code. Nor did object's tp_str consider that a type's tp_str
2092 could do something that could lead to an inifinite recursion.
2093 Py_ReprEnter() and Py_EnterRecursiveCall(), respectively, fixed the
2096 - Issue #1164: It was possible to trigger deadlock when using the
2097 'print' statement to write to a file since the GIL was not released
2098 as needed. Now PyObject_Print() does the right thing along with
2099 various tp_print implementations of the built-in types and those in
2100 the collections module.
2102 - Issue #1147: Exceptions were directly allowing string exceptions in
2103 their throw() method even though string exceptions no longer
2106 - Issue #1096: Prevent a segfault from getting the repr of a very
2107 deeply nested list by using the recursion counter.
2109 - Issue #1202533: Fix infinite recursion calls triggered by calls to
2110 PyObject_Call() never calling back out to Python code to trigger
2111 recursion depth updates/checks. Required the creation of a static
2112 RuntimeError instance in case normalizing an exception put the
2113 recursion check value past its limit. Fixes crashers
2114 infinite_rec_(1|2|4|5).py.
2116 - Patch #1031213: Decode source line in SyntaxErrors back to its
2117 original source encoding.
2119 - Patch #1673759: add a missing overflow check when formatting floats
2122 - Prevent expandtabs() on string and unicode objects from causing a
2123 segfault when a large width is passed on 32-bit platforms.
2125 - Issue #1733488: Fix compilation of bufferobject.c on AIX.
2127 - Issue #1722485: remove docstrings again when running with -OO.
2129 - Add new attribute names for function objects. All the func_* become
2130 __*__ attributes. (Some already existed, e.g., __doc__ and
2133 - Add -3 option to the interpreter to warn about features that are
2134 deprecated and will be changed/removed in Python 3.0.
2136 - Patch #1686487: you can now pass any mapping after '**' in function
2139 - except clauses may now be spelled either "except E, target:" or
2140 "except E as target:". This is to provide forwards compatibility
2143 - Deprecate BaseException.message as per PEP 352.
2145 - Issue #1303614: don't expose object's __dict__ when the dict is
2146 inherited from a builtin base.
2148 - When __slots__ are set to a unicode string, make it work the same as
2149 setting a plain string, ie don't expand to single letter identifiers.
2151 - Request #1191699: Slices can now be pickled.
2153 - Request #1193128: str.translate() now allows a None argument for
2154 translations that only remove characters without re-mapping the
2155 remaining characters.
2157 - Patch #1682205: a TypeError while unpacking an iterable is no longer
2158 masked by a generic one with the message "unpack non-sequence".
2160 - Remove unused file Python/fmod.c.
2162 - Bug #1683368: The object.__init__() and object.__new__() methods are
2163 now stricter in rejecting excess arguments. The only time when
2164 either allows excess arguments is when it is not overridden and the
2165 other one is. For backwards compatibility, when both are
2166 overridden, it is a deprecation warning (for now; maybe a Py3k
2167 warning later). Also, type.__init__() insists on the same signature
2168 as supported by type.__new__().
2170 - Patch #1675423: PyComplex_AsCComplex() now tries to convert an
2171 object to complex using its __complex__() method before falling back
2172 to the __float__() method. Therefore, the functions in the cmath
2173 module now can operate on objects that define a __complex__()
2176 - Patch #1623563: allow __class__ assignment for classes with
2177 __slots__. The old and the new class are still required to have the
2180 - Patch #1642547: Fix an error/crash when encountering syntax errors
2181 in complex if statements.
2183 - Patch #1462488: Python no longer segfaults when
2184 ``object.__reduce_ex__()`` is called with an object that is faking
2187 - Patch #1680015: Don't modify __slots__ tuple if it contains an
2190 - Patch #1444529: the builtin compile() now accepts keyword arguments.
2192 - Bug #1678647: write a newline after printing an exception in any
2193 case, even when converting the value to a string failed.
2195 - The dir() function has been extended to call the __dir__() method on
2196 its argument, if it exists. If not, it will work like before. This
2197 allows customizing the output of dir() in the presence of a
2200 - Patch #922167: Python no longer segfaults when faced with infinitely
2201 self-recursive reload() calls (as reported by bug #742342).
2203 - Patch #1675981: remove unreachable code from ``type.__new__()``
2206 - Patch #1491866: change the complex() constructor to allow
2207 parthensized forms. This means complex(repr(x)) now works instead of
2208 raising a ValueError.
2210 - Patch #703779: unset __file__ in __main__ after running a file. This
2211 makes the filenames the warning module prints much more sensible
2212 when a PYTHONSTARTUP file is used.
2214 - Variant of patch #697613: don't exit the interpreter on a SystemExit
2215 exception if the -i command line option or PYTHONINSPECT environment
2216 variable is given, but break into the interactive interpreter just
2217 like on other exceptions or normal program exit.
2219 - Patch #1638879: don't accept strings with embedded NUL bytes in
2222 - Bug #1674503: close the file opened by execfile() in an error
2225 - Patch #1674228: when assigning a slice (old-style), check for the
2226 sq_ass_slice instead of the sq_slice slot.
2228 - When printing an unraisable error, don't print exceptions. before
2229 the name. This duplicates the behavior whening normally printing
2232 - Bug #1653736: Properly discard third argument to
2233 slot_nb_inplace_power.
2235 - PEP 352: Raising a string exception now triggers a TypeError.
2236 Attempting to catch a string exception raises DeprecationWarning.
2238 - Bug #1377858: Fix the segfaulting of the interpreter when an object
2239 created a weakref on itself during a __del__ call for new-style
2240 classes (classic classes still have the bug).
2242 - Bug #1579370: Make PyTraceBack_Here use the current thread, not the
2243 frame's thread state.
2245 - patch #1630975: Fix crash when replacing sys.stdout in
2248 - Prevent seg fault on shutdown which could occur if an object raised
2251 - Bug #1566280: Explicitly invoke threading._shutdown from Py_Main, to
2252 avoid relying on atexit.
2254 - Bug #1590891: random.randrange don't return correct value for big
2257 - Patch #1586791: Better exception messages for some operations on
2258 strings, tuples and lists.
2260 - Bug #1067760: Deprecate passing floats to file.seek.
2262 - Bug #1591996: Correctly forward exception in instance_contains().
2264 - Bug #1588287: fix invalid assertion for `1,2` in debug builds.
2266 - Bug #1576657: when setting a KeyError for a tuple key, make sure
2267 that the tuple isn't used as the "exception arguments tuple".
2269 - Bug #1565514: SystemError not raised on too many nested blocks.
2271 - Bug #1576174: WindowsError now displays the windows error code
2272 again, no longer the posix error code.
2274 - Patch #1549049: Support long values in structmember, issue warnings
2275 if the assigned value for structmember fields gets truncated.
2277 - Update the peephole optimizer to remove more dead code (jumps after
2278 returns) and inline unconditional jumps to returns.
2280 - Bug #1545497: when given an explicit base, int() did ignore NULs
2281 embedded in the string to convert.
2283 - Bug #1569998: break inside a try statement (outside a loop) is now
2284 recognized and rejected.
2286 - list.pop(x) accepts any object x following the __index__ protocol.
2288 - A number of places, including integer negation and absolute value,
2289 were fixed to not rely on undefined behaviour of the C compiler
2292 - Bug #1566800: make sure that EnvironmentError can be called with any
2293 number of arguments, as was the case in Python 2.4.
2295 - Patch #1567691: super() and new.instancemethod() now don't accept
2296 keyword arguments any more (previously they accepted them, but
2299 - Fix a bug in the parser's future statement handling that led to
2300 "with" not being recognized as a keyword after, e.g., this
2301 statement: from __future__ import division, with_statement
2303 - Bug #1557232: fix seg fault with def f((((x)))) and def f(((x),)).
2305 - Fix %zd string formatting on Mac OS X so it prints negative numbers.
2307 - Allow exception instances to be directly sliced again.
2309 - Bug #1551432: Exceptions do not define an explicit __unicode__
2310 method. This allows calling unicode() on exceptions classes
2311 directly to succeed.
2313 - Bug #1542051: Exceptions now correctly call PyObject_GC_UnTrack.
2314 Also make sure that every exception class has __module__ set to
2317 - Bug #1550983: emit better error messages for erroneous relative
2318 imports (if not in package and if beyond toplevel package).
2320 - Overflow checking code in integer division ran afoul of new gcc
2321 optimizations. Changed to be more standard-conforming.
2323 - Patch #1542451: disallow continue anywhere under a finally.
2325 - Patch #1546288: fix seg fault in dict_equal due to ref counting bug.
2327 - The return tuple from str.rpartition(sep) is (tail, sep, head) where
2328 head is the original string if sep was not found.
2330 - Bug #1520864: unpacking singleton tuples in list comprehensions and
2331 generator expressions (x for x, in ... ) works again. Fixing this
2332 problem required changing the .pyc magic number. This means that
2333 .pyc files generated before 2.5c2 will be regenerated.
2335 - ``with`` and ``as`` are now keywords.
2337 - Bug #1664966: Fix crash in exec if Unicode filename can't be
2340 - Issue #1537: Changed GeneratorExit's base class from Exception to
2343 - Issue #1703448: A joined thread could show up in the
2344 threading.enumerate() list after the join() for a brief period until
2351 - Patch #2274: Add heapq.heappushpop().
2353 - Add inspect.isabstract(object) to fix bug #2223
2355 - Add a __format__ method to Decimal, to support PEP 3101.
2357 - Add a timing parameter when using trace.Trace to print out
2360 - Issue #1627: httplib now ignores negative Content-Length headers.
2362 - Issue #900744: If an invalid chunked-encoding header is sent by a
2363 server, httplib will now raise IncompleteRead and close the
2364 connection instead of raising ValueError.
2366 - Issue #1492: The content type of BaseHTTPServer error messages can
2369 - Issue #1781: ConfigParser now does not let you add the "default" section
2372 - Removed uses of dict.has_key() from distutils, and uses of
2373 callable() from copy_reg.py, so the interpreter now starts up
2374 without warnings when '-3' is given. More work like this needs to
2375 be done in the rest of the stdlib.
2377 - Issue #1916: added isgenerator() and isgeneratorfunction() to
2380 - Issue #1224: Fixed bad url parsing when path begins with double
2383 - ctypes instances that are not or do not contain pointers can now be
2386 - Patch #1966: Break infinite loop in httplib when the servers
2387 implements the chunked encoding incorrectly.
2389 - Rename rational.py to fractions.py and the rational.Rational class
2390 to fractions.Fraction, to avoid the name clash with the abstract
2391 base class numbers.Rational. See discussion in issue #1682.
2393 - The pickletools module now provides an optimize() function that
2394 eliminates unused PUT opcodes from a pickle string.
2396 - Patch #2021: Allow tempfile.NamedTemporaryFile and
2397 SpooledTemporaryFile to be used in with statements by correctly
2398 supporting the context management protocol.
2400 - Patch #1979: Add rich comparisons to Decimal, and make Decimal
2401 comparisons involving a NaN follow the IEEE 754 standard.
2403 - Issue #2004: tarfile.py: Use mode 0700 for temporary directories and
2404 default permissions for missing directories.
2406 - Issue #175006: The debugger used to skip the condition of a "while"
2407 statement after the first iteration. Now it correctly steps on the
2408 expression, and breakpoints on the "while" statement are honored on
2411 - Issue #1765140: add an optional delay argument to FileHandler and
2412 its subclasses. Defaults to false (existing behaviour), but if true,
2413 defers opening the file until the first call to emit().
2415 - The pprint module now supports sets and frozensets.
2417 - Issue #1221598: add optional callbacks to ftplib.FTP's storbinary()
2418 and storlines() methods. (Contributed by Phil Schwartz)
2420 - Issue #1715: include sub-extension modules in pydoc's text output.
2422 - Issue #1836: fix an off-by-one bug in TimedRotatingHandler's
2423 rollover time calculation.
2425 - Issue #1021: fix a bug to allow basicConfig to accept NOTSET as a
2428 - Issue #932563: add LoggerAdapter convenience class to make it easier
2429 to add contextual information in logging output.
2431 - Issue #1760556: fix a bug to avoid FileHandler throwing an exception
2434 - Bug #1530959: distutils' build command now uses different build
2435 directory when building extension modules against versions of Python
2436 compiled with ``--with-pydebug``.
2438 - Issue #1555501: move plistlib from plat-mac directory to general
2441 - Issue #1269: fix a bug in pstats.add_callers() and add a unit test
2444 - Issue #1669: don't allow shutil.rmtree() to be called on a symlink
2447 - Issue #1664522: in urllib, don't read non-existing directories in
2448 ftp mode, returning a 0-byte file -- raise an IOError instead.
2450 - Issue #856047: respect the ``no_proxy`` environment variable when
2451 using the ``http_proxy`` etc. environment variables in urllib.
2453 - Issue #1178141: add a getcode() method to the addinfourls that
2454 urllib.open() returns so that you can retrieve the HTTP status code.
2456 - Issue #1003: Fix zipfile decryption check, it would fail zip files
2457 with extended local headers.
2459 - Issue #1189216: Fix the zipfile module to work on archives with
2460 headers past the 2**31 byte boundary.
2462 - Issue #1336: fix a race condition in subprocess.Popen if the garbage
2463 collector kicked in at the wrong time that would cause the process
2464 to hang when the child wrote to stderr.
2466 - Issue #1146: fix how textwrap breaks a long word that would start in
2467 the last column of a line.
2469 - Issue #1693149: trace.py --ignore-module - accept multiple
2470 comma-separated modules to be given.
2472 - Issue #1822: MIMEMultipart.is_multipart() behaves correctly for a
2473 just-created (and empty) instance. Thanks Jonathan Share.
2475 - Issue #1861: Added an attribute to the sched module which returns an
2476 ordered list of upcoming events (displayed as named tuples).
2478 - Issue #1837: The queue module now also supports a LIFO queue and a
2481 - Patch #1048820: Add insert-mode editing to curses.textpad.Textbox
2482 (patch by Stefan Wehr). Also, fix an off-by-one bug in
2485 - Issue #1831: ctypes now raises a TypeError if conflicting positional
2486 and named arguments are passed to a Structure or Union initializer.
2487 When too many positional arguments are passed, also a TypeError is
2488 raised instead of a ValueError.
2490 - Convert the internal ctypes array type cache to a WeakValueDict so
2491 that array types do not live longer than needed.
2493 - Issue #1786: pdb should use its own stdin/stdout around an exec call
2494 and when creating a recursive instance.
2496 - Issue #1698398: ZipFile.printdir() crashed because the format string
2497 expected a tuple type of length six instead of time.struct_time
2500 - Issue #1780: The Decimal constructor now accepts arbitrary leading
2501 and trailing whitespace when constructing from a string.
2502 Context.create_decimal no longer accepts trailing newlines.
2504 - Decimal.as_tuple(), difflib.find_longest_match() and inspect
2505 functions that returned a tuple now return a named tuple.
2507 - Doctest now returns results as a named tuple for readability:
2508 (0, 7) --> TestResults(failed=0, attempted=7)
2510 - Issue #846388:q re.match is interruptible now, which is particularly
2511 good for long regular expression matches.
2513 - Patch #1137: allow setting buffer_size attribute on pyexpat Parser
2514 objects to set the character data buffer size.
2516 - Issue #1757: The hash of a Decimal instance is no longer affected by
2517 the current context.
2519 - Patch #467924: add ZipFile.extract() and ZipFile.extractall() in the
2522 - Issue #1646: Make socket support the TIPC protocol.
2524 - Bug #1742: return os.curdir from os.path.relpath() if both arguments
2525 are equal instead of raising an exception.
2527 - Patch #1637: fix urlparse for URLs like 'http://x.com?arg=/foo'.
2529 - Patch #1698: allow '@' in username parsed by urlparse.py.
2531 - Issue #1735: TarFile.extractall() now correctly sets directory
2532 permissions and times.
2534 - Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a mountpoint.
2536 - Bug #1687: Fxed plistlib.py restricts <integer> to Python int when
2539 - Issue #1700: Regular expression inline flags incorrectly handle
2540 certain unicode characters.
2542 - Issue #1689: PEP 3141, numeric abstract base classes.
2544 - Tk issue #1851526: Return results from Python callbacks to Tcl as
2547 - Issue #1642: Fix segfault in ctypes when trying to delete attributes.
2549 - Issue #1727780: Support loading pickles of random.Random objects
2550 created on 32-bit systems on 64-bit systems, and vice versa. As a
2551 consequence of the change, Random pickles created by Python 2.6
2552 cannot be loaded in Python 2.5.
2554 - Issue #1455: The distutils package now supports VS 2005 and VS 2008
2555 for both the msvccompiler and cygwincompiler.
2557 - Issue #1531: tarfile.py: Read fileobj from the current offset, do
2558 not seek to the start.
2560 - Issue #1534: Added a dictionary sys.float_info with information
2561 about the internal floating point type to the sys module.
2563 - Issue #1429818: patch for trace and doctest modules so they play
2566 - doctest made a bad assumption that a package's __loader__.get_data()
2567 method used universal newlines.
2569 - Issue #1705170: contextlib.contextmanager was still swallowing
2570 StopIteration in some cases. This should no longer happen.
2572 - Issue #1292: On alpha, arm, ppc, and s390 linux systems the
2573 --with-system-ffi configure option defaults to "yes".
2575 - IN module for FreeBSD 8 is added and preexisting FreeBSD 6 and 7
2578 - Issues #1181, #1287: unsetenv() is now called when the
2579 os.environ.pop() and os.environ.clear() methods are used.
2581 - ctypes will now work correctly on 32-bit systems when Python is
2582 configured with --with-system-ffi.
2584 - Patch #1203: ctypes now does work on OS X when Python is built with
2585 --disable-toolbox-glue.
2587 - collections.deque() now supports a "maxlen" argument.
2589 - itertools.count() is no longer bounded to LONG_MAX. Formerly, it
2590 raised an OverflowError. Now, automatically shifts from ints to
2593 - Added itertools.product() which forms the Cartesian product of the
2596 - Added itertools.combinations() and itertools.permutations().
2598 - Patch #1541463: optimize performance of cgi.FieldStorage operations.
2600 - Decimal is fully updated to the latest Decimal Specification
2603 - Bug #1153: repr.repr() now doesn't require set and dictionary items
2604 to be orderable to properly represent them.
2606 - A 'c_longdouble' type was added to the ctypes module.
2608 - Bug #1709599: Run test_1565150 only if the file system is NTFS.
2610 - When encountering a password-protected robots.txt file the
2611 RobotFileParser no longer prompts interactively for a username and
2612 password (bug 813986).
2614 - TarFile.__init__() no longer fails if no name argument is passed and
2615 the fileobj argument has no usable name attribute (e.g. StringIO).
2617 - The functools module now provides 'reduce', for forward
2618 compatibility with Python 3000.
2620 - Server-side SSL support and cert verification added, by Bill
2623 - socket.ssl deprecated; use new ssl module instead.
2625 - uuid creation is now threadsafe.
2627 - EUC-KR codec now handles the cheot-ga-keut composed make-up hangul
2630 - GB18030 codec now can encode additional two-byte characters that are
2633 - Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
2635 - Bug #1704793: Return UTF-16 pair if unicodedata.lookup cannot
2636 represent the result in a single character.
2638 - Bug #978833: Close https sockets by releasing the _ssl object.
2640 - Change location of the package index to pypi.python.org/pypi
2642 - Bug #1701409: Fix a segfault in printing ctypes.c_char_p and
2643 ctypes.c_wchar_p when they point to an invalid location. As a
2644 sideeffect the representation of these instances has changed.
2646 - tarfile.py: Added "exclude" keyword argument to TarFile.add().
2648 - Bug #1734723: Fix repr.Repr() so it doesn't ignore the maxtuple
2651 - The urlopen function of urllib2 now has an optional timeout
2652 parameter (note that it actually works with HTTP, HTTPS, FTP and
2655 - In ftplib, the FTP.ntransfercmd method, when in passive mode, now
2656 uses the socket.create_connection function, using the timeout
2657 specified at connection time.
2659 - Bug #1728403: Fix a bug that CJKCodecs StreamReader hangs when it
2660 reads a file that ends with incomplete sequence and sizehint
2661 argument for .read() is specified.
2663 - Bug #1730389: Change time.strptime() to use ``\s+`` instead of
2664 ``\s*`` when matching spaces in the specified format argument.
2666 - Bugs #1668596/#1720897: distutils now copies data files even if
2667 package_dir is empty.
2669 - sha now raises a DeprecationWarning upon import.
2671 - md5 now raises a DeprecationWarning upon import.
2673 - Issue #1385: The hmac module now computes the correct hmac when
2674 using hashes with a block size other than 64 bytes (such as sha384
2677 - mimify now raises a DeprecationWarning upon import.
2679 - MimeWriter now raises a DeprecationWarning upon import.
2681 - tarfile.py: Improved unicode support. Unicode input names are now
2682 officially supported. Added "errors" argument to the TarFile class.
2684 - urllib.ftpwrapper class now accepts an optional timeout.
2686 - shlex.split() now has an optional "posix" parameter.
2688 - The posixfile module now raises a DeprecationWarning.
2690 - Remove the gopherlib module. This also leads to the removal of
2691 gopher support in urllib/urllib2.
2693 - Fix bug in marshal where bad data would cause a segfault due to lack
2694 of an infinite recursion check.
2696 - Removed plat-freebsd2 and plat-freebsd3 directories (and IN.py in
2699 - HTML-escape the plain traceback in cgitb's HTML output, to prevent
2700 the traceback inadvertently or maliciously closing the comment and
2701 injecting HTML into the error page.
2703 - The popen2 module and os.popen* are deprecated. Use the subprocess
2706 - Added an optional credentials argument to SMTPHandler, for use with
2707 SMTP servers which require authentication.
2709 - Patch #1695948: Added optional timeout parameter to SocketHandler.
2711 - Bug #1652788: Minor fix for currentframe.
2713 - Patch #1598415: Added WatchedFileHandler to better support external
2714 log file rotation using e.g. newsyslog or logrotate. This handler is
2715 only useful in Unix/Linux environments.
2717 - Bug #1706381: Specifying the SWIG option "-c++" in the setup.py file
2718 (as opposed to the command line) will now write file names ending in
2721 - As specified in RFC 2616, an HTTP response like 2xx indicates that
2722 the client's request was successfully received, understood, and
2723 accepted. Now in these cases no error is raised in urllib (issue
2726 - Bug #1290505: time.strptime's internal cache of locale information
2727 is now properly recreated when the locale is changed.
2729 - Patch #1685563: remove (don't add) duplicate paths in
2730 distutils.MSVCCompiler.
2732 - Added a timeout parameter to the constructor of other protocols
2733 (telnetlib, ftplib, smtplib and poplib). This is second part of the
2734 work started with create_connection() and timeout in httplib, and
2735 closes patch #723312.
2737 - Patch #1676823: Added create_connection() to socket.py, which may be
2738 called with a timeout, and use it from httplib (whose HTTPConnection
2739 and HTTPSConnection now accept an optional timeout).
2741 - Bug #978833: Revert r50844, as it broke _socketobject.dup.
2743 - Bug #1675967: re patterns pickled with Python 2.4 and earlier can
2744 now be unpickled with Python 2.5 and newer.
2746 - Patch #1630118: add a SpooledTemporaryFile class to tempfile.py.
2748 - Patch #1273829: os.walk() now has a "followlinks" parameter. If set
2749 to True (which is not the default), it visits symlinks pointing to
2752 - Bug #1681228: the webbrowser module now correctly uses the default
2753 GNOME or KDE browser, depending on whether there is a session of one
2754 of those present. Also, it tries the Windows default browser before
2755 trying Mozilla variants.
2757 - Patch #1339796: add a relpath() function to os.path.
2759 - Patch #1681153: the wave module now closes a file object it opened if
2760 initialization failed.
2762 - Bug #767111: fix long-standing bug in urllib which caused an
2763 AttributeError instead of an IOError when the server's response
2764 didn't contain a valid HTTP status line.
2766 - Patch #957650: "%var%" environment variable references are now
2767 properly expanded in ntpath.expandvars(), also "~user" home
2768 directory references are recognized and handled on Windows.
2770 - Patch #1429539: pdb now correctly initializes the __main__ module
2771 for the debugged script, which means that imports from __main__ work
2774 - The nonobvious commands.getstatus() function is now deprecated.
2776 - Patch #1393667: pdb now has a "run" command which restarts the
2777 debugged Python program, optionally with different arguments.
2779 - Patch #1649190: Adding support for _Bool to ctypes as c_bool.
2781 - Patch #1530482: add pydoc.render_doc() which returns the
2782 documentation for a thing instead of paging it to stdout, which
2785 - Patch #1533909: the timeit module now accepts callables in addition
2786 to strings for the code to time and the setup code. Also added two
2787 convenience functions for instantiating a Timer and calling its
2790 - Patch #1537850: tempfile.NamedTemporaryFile now has a "delete"
2791 parameter which can be set to False to prevent the default
2792 delete-on-close behavior.
2794 - Patch #1581073: add a flag to textwrap that prevents the dropping of
2795 whitespace while wrapping.
2797 - Patch #1603688: ConfigParser.SafeConfigParser now checks values that
2798 are set for invalid interpolation sequences that would lead to
2799 errors on reading back those values.
2801 - Added support for the POSIX.1-2001 (pax) format to
2802 tarfile.py. Extended and cleaned up the test suite. Added a new
2805 - Patch #1449244: Support Unicode strings in
2806 email.message.Message.{set_charset,get_content_charset}.
2808 - Patch #1542681: add entries for "with", "as" and "CONTEXTMANAGERS"
2809 to pydoc's help keywords.
2811 - Patch #1555098: use str.join() instead of repeated string
2812 concatenation in robotparser.
2814 - Patch #1635454: the csv.DictWriter class now includes the offending
2815 field names in its exception message if you try to write a record
2816 with a dictionary containing fields not in the CSV field names list.
2818 - Patch #1668100: urllib2 now correctly raises URLError instead of
2819 OSError if accessing a local file via the file:// protocol fails.
2821 - Patch #1677862: Require a space or tab after import in .pth files.
2823 - Patch #1192590: Fix pdb's "ignore" and "condition" commands so they
2824 trap the IndexError caused by passing in an invalid breakpoint
2827 - Patch #1599845: Add an option to disable the implicit calls to
2828 server_bind() and server_activate() in the constructors for
2829 TCPServer, SimpleXMLRPCServer and DocXMLRPCServer.
2831 - Bug #1531963: Make SocketServer.TCPServer's server_address always be
2832 equal to calling getsockname() on the server's socket. Fixed by
2835 - Patch #742598: Add .timeout attribute to SocketServer that calls
2836 .handle_timeout() when no requests are received.
2838 - Bug #1651235: When a tuple was passed to a ctypes function call,
2839 Python would crash instead of raising an error.
2841 - Bug #1646630: ctypes.string_at(buf, 0) and ctypes.wstring_at(buf, 0)
2842 returned string up to the first NUL character.
2844 - Patch #957003: Implement smtplib.LMTP.
2846 - Patch #1481079: add support for HTTP_REFERER to CGIHTTPServer.
2848 - Patch #1675424: Added tests for uncovered code in the zipfile
2849 module. The KeyError raised by Zipfile.getinfo for nonexistent
2850 names now has a descriptive message.
2852 - Bug #1115886: os.path.splitext('.cshrc') gives now ('.cshrc', '').
2854 - unittest now verifies more of its assumptions. In particular,
2855 TestCase and TestSuite subclasses (not instances) are no longer
2856 accepted in TestSuite.addTest(). This should cause no
2857 incompatibility since it never made sense with ordinary subclasses
2858 -- the failure just occurred later, with a more cumbersome
2861 - Patch #787789: allow to pass custom TestRunner instances to
2862 unittest's main() function.
2864 - Patches #1550273, #1550272: fix a few bugs in unittest and add a
2865 comprehensive test suite for the module.
2867 - Patch #1001604: glob.glob() now returns unicode filenames if it was
2868 given a unicode argument and os.listdir() returns unicode filenames.
2870 - Patch #1673619: setup.py identifies extension modules it doesn't
2871 know how to build and those it knows how to build but that fail to
2874 - Patch #912410: Replace HTML entity references for attribute values
2877 - Patch #1663234: you can now run doctest on test files and modules
2878 using "python -m doctest [-v] filename ...".
2880 - Patch #1121142: Implement ZipFile.open.
2882 - Taught setup.py how to locate Berkeley DB on Macs using MacPorts.
2884 - Added heapq.merge() for merging sorted input streams.
2886 - Added collections.namedtuple() for assigning field names to tuples.
2888 - Added itertools.izip_longest().
2890 - Have the encoding package's search function dynamically import using
2891 absolute import semantics.
2893 - Patch #1647484: Renamed GzipFile's filename attribute to name.
2895 - Patch #1517891: Mode 'a' for ZipFile now creates the file if it
2898 - Patch #698833: Support file decryption in zipfile.
2900 - Patch #685268: Consider a package's __path__ in imputil.
2902 - Patch #1463026: Support default namespace in XMLGenerator.
2904 - Patch #1571379: Make trace's --ignore-dir facility work in the face
2905 of relative directory names.
2907 - Bug #1600860: Search for shared python library in LIBDIR, not
2908 lib/python/config, on "linux" and "gnu" systems.
2910 - Patch #1652681: tarfile.py: create nonexistent files in append mode
2911 and allow appending to empty files.
2913 - Bug #1124861: Automatically create pipes if GetStdHandle fails in
2916 - Patch #1634778: add missing encoding aliases for iso8859_15 and
2919 - Patch #1638243: the compiler package is now able to correctly
2920 compile a with statement; previously, executing code containing a
2921 with statement compiled by the compiler package crashed the
2924 - Bug #1643943: Fix time.strptime's support for the %U directive.
2926 - Patch #1507247: tarfile.py: use current umask for intermediate
2929 - Patch #1627441: close sockets properly in urllib2.
2931 - Bug #494589: make ntpath.expandvars behave according to its
2934 - Changed platform module API python_version_tuple() to actually
2935 return a tuple (it used to return a list).
2937 - Added new platform module APIs python_branch(), python_revision(),
2938 python_implementation() and linux_distribution().
2940 - Added support for IronPython and Jython to the platform module.
2942 - The sets module has been deprecated. Use the built-in set/frozenset
2945 - Bug #1610795: make ctypes.util.find_library work on BSD systems.
2947 - Fixes for 64-bit Windows: In ctypes.wintypes, correct the
2948 definitions of HANDLE, WPARAM, LPARAM data types. Make
2949 parameterless foreign function calls work.
2951 - The version number of the ctypes package changed to "1.1.0".
2953 - Bug #1627575: logging: Added _open() method to FileHandler which can
2954 be used to reopen files. The FileHandler instance now saves the
2955 encoding (which can be None) in an attribute called "encoding".
2957 - Bug #411881: logging.handlers: bare except clause removed from
2958 SMTPHandler.emit. Now, only ImportError is trapped.
2960 - Bug #411881: logging.handlers: bare except clause removed from
2961 SocketHandler.createSocket. Now, only socket.error is trapped.
2963 - Bug #411881: logging: bare except clause removed from
2964 LogRecord.__init__. Now, only ValueError, TypeError and
2965 AttributeError are trapped.
2967 - Patch #1504073: Fix tarfile.open() for mode "r" with a fileobj
2970 - Patch #1182394 from Shane Holloway: speed up HMAC.hexdigest.
2972 - Patch #1262036: Prevent TarFiles from being added to themselves
2973 under certain conditions.
2975 - Patch #1230446: tarfile.py: fix ExFileObject so that read() and
2976 tell() work correctly together with readline().
2978 - Patch #1484695: The tarfile module now raises a HeaderError
2979 exception if a buffer given to frombuf() is invalid.
2981 - Bug #1503765: Fix a problem in logging.config with spaces in comma-
2982 separated lists read from logging config files.
2984 - Patch #1604907: Fix problems in logging.handlers caused at logging
2985 shutdown when syslog handlers fail to initialize because of syslogd
2988 - Patch #1608267: fix a race condition in os.makedirs() if the
2989 directory to be created is already there.
2991 - Patch #1610437: fix a tarfile bug with long filename headers.
2993 - Patch #1371075: Make ConfigParser accept optional dict type for
2994 ordering, sorting, etc.
2996 - Bug #1563807: _ctypes built on AIX fails with ld ffi error.
2998 - Bug #1598620: A ctypes Structure cannot contain itself.
3000 - Patch #1070046: Marshal new-style objects like InstanceType in
3003 - cStringIO.truncate(-1) now raises an IOError, like StringIO and
3006 - Patch #1472877: Fix Tix subwidget name resolution.
3008 - Patch #1594554: Always close a tkSimpleDialog on ok(), even if an
3011 - Patch #1538878: Don't make tkSimpleDialog dialogs transient if the
3012 parent window is withdrawn.
3014 - Bug #1597824: return the registered function from atexit.register()
3015 to facilitate usage as a decorator.
3017 - Patch #1360200: Use unmangled_version RPM spec field to deal with
3020 - Patch #1359217: Process 2xx response in an ftplib transfer that
3021 precedes an 1xx response.
3023 - Patch #1355023: support whence argument for GzipFile.seek.
3025 - Patch #1065257: Support passing open files as body in
3026 HTTPConnection.request().
3028 - Bug #1569790: mailbox.py: Maildir.get_folder() and MH.get_folder()
3029 weren't passing the message factory on to newly created Maildir/MH
3032 - Patch #1514543: mailbox.py: In the Maildir class, report errors if
3033 there's a filename clash instead of possibly losing a message.
3034 (Patch by David Watson.)
3036 - Patch #1514544: Try to ensure that messages/indexes have been
3037 physically written to disk after calling .flush() or
3038 .close(). (Patch by David Watson.)
3040 - Patch #1592250: Add elide argument to Tkinter.Text.search.
3042 - Patch #838546: Make terminal become controlling in pty.fork().
3044 - Patch #1351744: Add askyesnocancel helper for tkMessageBox.
3046 - Patch #1060577: Extract list of RPM files from spec file in
3049 - Bug #1586613: fix zlib and bz2 codecs' incremental en/decoders.
3051 - Patch #1583880: fix tarfile's problems with long names and posix/
3054 - Bug #1586448: the compiler module now emits the same bytecode for
3055 list comprehensions as the builtin compiler, using the LIST_APPEND
3058 - Fix codecs.EncodedFile which did not use file_encoding in 2.5.0, and
3059 fix all codecs file wrappers to work correctly with the "with"
3060 statement (bug #1586513).
3062 - Lib/modulefinder.py now handles absolute and relative imports
3065 - Patch #1567274: Support SMTP over TLS.
3067 - Patch #1560695: Add .note.GNU-stack to ctypes' sysv.S so that ctypes
3068 isn't considered as requiring executable stacks.
3070 - ctypes callback functions only support 'fundamental' data types as
3071 result type. Raise an error when something else is used. This is a
3072 partial fix for Bug #1574584.
3074 - Fix turtle so that time.sleep is imported for the entire library.
3075 Allows the demo2 function to be executed on its own instead of only
3076 when the module is run as a script.
3078 - Bug #813342: Start the IDLE subprocess with -Qnew if the parent is
3079 started with that option.
3081 - Bug #1565150: Fix subsecond processing for os.utime on Windows.
3083 - Support for MSVC 8 was added to bdist_wininst.
3085 - Bug #1446043: correctly raise a LookupError if an encoding name
3086 given to encodings.search_function() contains a dot.
3088 - Bug #1560617: in pyclbr, return full module name not only for
3089 classes, but also for functions.
3091 - Bug #1457823: cgi.(Sv)FormContentDict's constructor now takes
3092 keep_blank_values and strict_parsing keyword arguments.
3094 - Bug #1566602: correct failure of posixpath unittest when $HOME ends
3097 - Bug #1565661: in webbrowser, split() the command for the default
3098 GNOME browser in case it is a command with args.
3100 - Made the error message for time.strptime when the data data and
3101 format do match be more clear.
3103 - Fix a bug in traceback.format_exception_only() that led to an error
3104 being raised when print_exc() was called without an exception set.
3105 In version 2.4, this printed "None", restored that behavior.
3107 - Make webbrowser.BackgroundBrowser usable in Windows (it wasn't
3108 because the close_fds arg to subprocess.Popen is not supported).
3110 - Reverted patch #1504333 to sgmllib because it introduced an infinite
3113 - Patch #1553314: Fix the inspect.py slowdown that was hurting IPython
3114 & SAGE by adding smarter caching in inspect.getmodule()
3116 - Fix missing import of the types module in logging.config.
3118 - Patch #1550886: Fix decimal module context management implementation
3119 to match the localcontext() example from PEP 343.
3121 - Bug #1545341: The 'classifier' keyword argument to the Distutils
3122 setup() function now accepts tuples as well as lists.
3124 - Bug #1541863: uuid.uuid1 failed to generate unique identifiers on
3125 systems with low clock resolution.
3127 - Bug #1531862: Do not close standard file descriptors in subprocess.
3129 - idle: Honor the "Cancel" action in the save dialog (Debian bug
3132 - Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
3133 the first chunk fed to the decoder started with a BOM, but was
3134 longer than 3 bytes.
3136 - The implementation of UnicodeError objects has been simplified
3137 (start and end attributes are now stored directly as Py_ssize_t
3140 - Issue #829951: In the smtplib module, SMTP.starttls() now complies
3141 with RFC 3207 and forgets any knowledge obtained from the server not
3142 obtained from the TLS negotiation itself. Patch contributed by Bill
3145 - Issue #1339: The smtplib.SMTP class has been refactored a bit such
3146 that the SMTP.starttls() caller no longer needs to call ehlo()
3147 beforehand. SMTP.starttls() now raises an exception of the server
3148 does not claim to support starttls. Adds the
3149 SMTP.ehlo_or_helo_if_needed() method. Patch contributed by Bill
3152 - Patch #1089358: Add signal.siginterrupt, a wrapper around
3158 - Patch #1657: added select.epoll and select.kqueue.
3160 - Patch #1506171: added operator.methodcaller().
3162 - Patch #1826: operator.attrgetter() now supports dotted attribute paths.
3164 - Patch #1957: syslogmodule: Release GIL when calling syslog(3).
3166 - Bug #2112: mmap.error is now a subclass of EnvironmentError and not
3167 a direct EnvironmentError.
3169 - Bug #2111: mmap segfaults when trying to write a block opened with
3172 - Bug #2063: correct order of utime and stime in os.times() result on
3175 - Patch #1736: Fix file name handling of _msi.FCICreate.
3177 - Updated ``big5hkscs`` codec to the HKSCS revision of 2004.
3179 - Issue #1940: make it possible to use curses.filter() before
3180 curses.initscr() as the documentation says.
3182 - Backport of _fileio module from Python 3.0.
3184 - Patch #1087741: mmap.mmap is now a class, not a factory function. It
3185 is also subclassable now.
3187 - Patch #1648: added ``sys.getprofile()`` and ``sys.gettrace()``.
3189 - Patch #1663329: added ``os.closerange()`` function to quickly close
3190 a range of file descriptors without considering errors.
3192 - Patch #976880: ``mmap`` objects now have an ``rfind`` method that
3193 works as expected. ``mmap.find`` also takes an optional ``end``
3196 - _winreg's HKEY object has gained __enter__ and __exit__ methods to
3197 support the context manager protocol. The _winreg module also
3198 gained a new function ``ExpandEnvironmentStrings`` to expand
3201 - itertools.starmap() now accepts any iterable input. Previously, it
3202 required the function inputs to be tuples.
3204 - itertools.chain() now has an alternate constructor,
3205 chain.from_iterable().
3207 - Issue #1646: Make socket support TIPC. The socket module now has
3208 support for TIPC under Linux, see http://tipc.sf.net/ for more
3211 - Added interface for Windows' WSAIoctl to socket object and added an
3212 example for a simple network sniffer.
3214 - Bug #1301: Bad assert in _tkinter fixed.
3216 - Added bdist_wininst executable for VS 2008.
3218 - Bug #1604: collections.deque.__init__(iterable) now clears any prior
3219 contents before adding elements from the iterable. This fix brings
3220 the behavior into line with that for list.__init__().
3222 - Added wide char functions to msvcrt module: getwch, getwche, putwch
3223 and ungetwch. The functions accept or return unicode.
3225 - os.access now returns True on Windows for any existing directory.
3227 - Added warnpy3k function to the warnings module.
3229 - Marshal.dumps() now expects exact type matches for int, long, float,
3230 complex, tuple, list, dict, set, and frozenset. Formerly, it would
3231 silently miscode subclasses of those types. Now, it raises a
3234 - Patch #1388440: Add set_completion_display_matches_hook and
3235 get_completion_type to readline.
3237 - Bug #1649098: Avoid declaration of zero-sized array declaration in
3240 - Removed the rgbimg module; been deprecated since Python 2.5.
3242 - Bug #1721309: prevent bsddb module from freeing random memory.
3244 - Bug #1233: fix bsddb.dbshelve.DBShelf append method to work as
3245 intended for RECNO databases.
3247 - pybsddb.sf.net Bug #477182: Load the database flags at database open
3248 time so that opening a database previously created with the DB_DUP
3249 or DB_DUPSORT flag set will keep the proper behavior on subsequent
3250 opens. Specifically: dictionary assignment to a DB object will
3251 replace all values for a given key when the database allows
3252 duplicate values. DB users should use DB.put(k, v) when they want
3253 to store duplicates; not DB[k] = v.
3255 - Add the bsddb.db.DBEnv.lock_id_free method.
3257 - Bug #1686475: Support stat'ing open files on Windows again.
3259 - Patch #1185447: binascii.b2a_qp() now correctly quotes binary
3260 characters with ASCII value less than 32. Also, it correctly quotes
3261 dots only if they occur on a single line, as opposed to the previous
3262 behavior of quoting dots if they are the second character of any
3265 - Bug #1622896: fix a rare corner case where the bz2 module raised an
3266 error in spite of a succesful compression.
3268 - Patch #1654417: make operator.{get,set,del}slice use the full range
3271 - Patch #1646728: datetime.fromtimestamp fails with negative
3272 fractional times. With unittest.
3274 - Patch #1490190: posixmodule now includes os.chflags() and
3275 os.lchflags() functions on platforms where the underlying system
3276 calls are available.
3278 - Patch #1494140: Add documentation for the new struct.Struct object.
3280 - Patch #1432399: Support the HCI protocol for bluetooth sockets
3282 - Patch #1657276: Make NETLINK_DNRTMSG conditional.
3284 - Bug #1653736: Complain about keyword arguments to time.isoformat.
3286 - Bug #1486663: don't reject keyword arguments for subclasses of
3289 - Patch #1610575: The struct module now supports the 't' code, for C99
3292 - Patch #1635058: ensure that htonl and friends never accept or return
3293 negative numbers, per the underlying C implementation.
3295 - Patch #1544279: Improve thread-safety of the socket module by moving
3296 the sock_addr_t storage out of the socket object.
3298 - Patch #1019808: fix bug that causes an incorrect error to be
3299 returned when a socket timeout is set and a connection attempt
3302 - Speed up function calls into the math module.
3304 - Bug #1588217: don't parse "= " as a soft line break in binascii's
3305 a2b_qp() function, instead leave it in the string as quopri.decode()
3308 - Bug #1599782: Fix segfault on bsddb.db.DB().type().
3310 - Bug #1567666: Emulate GetFileAttributesExA for Win95.
3312 - Patch #1576166: Support os.utime for directories on Windows NT+.
3314 - Patch #1572724: fix typo ('=' instead of '==') in _msi.c.
3316 - Bug #1572832: fix a bug in ISO-2022 codecs which may cause segfault
3317 when encoding non-BMP unicode characters.
3319 - Bug #1556784: allow format strings longer than 127 characters in
3320 datetime's strftime function.
3322 - Fix itertools.count(n) to work with negative numbers again.
3324 - RLIMIT_SBSIZE was added to the resource module where available.
3326 - Bug #1551427: fix a wrong NULL pointer check in the win32 version of
3329 - Bug #1548092: fix curses.tparm seg fault on invalid input.
3331 - Patch #1114: fix curses module compilation on 64-bit AIX, & possibly
3332 other 64-bit LP64 platforms where attr_t is not the same size as a
3333 long. (Contributed by Luke Mewburn.)
3335 - Bug #1550714: fix SystemError from itertools.tee on negative value
3338 - Fixed a few bugs on cjkcodecs:
3339 - gbk and gb18030 codec now handle U+30FB KATAKANA MIDDLE DOT
3341 - iso2022_jp_2 codec now encodes into G0 for KS X 1001, GB2312
3342 codepoints to conform the standard.
3343 - iso2022_jp_3 and iso2022_jp_2004 codec can encode JIS X 0213:2
3346 - Bug #1552726: in readline.c, avoid repeatedly polling in interactive
3347 mode by only placing a timeout on the select() if an input hook has
3348 been defined. This prevents an interactive Python from waking up 10
3349 times per second. Patch by Richard Boulton.
3351 - fixed a bug with bsddb.DB.stat: the flags and txn keyword arguments
3354 - Added support for linking the bsddb module against BerkeleyDB 4.5.x,
3357 - Bug #1633621: if curses.resizeterm() or curses.resize_term() is
3358 called, update _curses.LINES, _curses.COLS, curses.LINES and
3361 - Fix an off-by-one bug in locale.strxfrm().
3363 - Fix libffi configure for hppa*-*-linux* | parisc*-*-linux*.
3365 - Build using system ffi library on arm*-linux*.
3367 - Bug #1372: zlibmodule.c: int overflow in PyZlib_decompress
3369 - bsddb module: Fix memory leak when using database cursors on
3370 databases without a DBEnv.
3372 - The sqlite3 module was updated to pysqlite 2.4.1.
3377 - Refactor test_logging to use unittest.
3379 - Refactor test_profile and test_cprofile to use the same code to
3382 - Make test_runpy reentrant by fixing _check_module to clear out any
3383 module being tested. Was causing an error by __import__ doing a
3384 reload on the second run and thus suppressing bytecode recreation.
3386 - Capture socket connection resets and timeouts in test_socket_ssl and
3387 test_urllib2net and raise test.test_support.ResourceDenied.
3389 - Patch #1559413: Fix test_cmd_line if sys.executable contains a
3392 - Added test.test_support.TransientResource which is a context manager
3393 to surround calls to resources that are not guaranteed to work even
3394 if test.test_support.requires says that the resource should exist.
3396 - Added a test for slicing of an exception.
3398 - Added test.test_support.EnvironmentVarGuard. It's a class that
3399 provides a context manager so that one can temporarily set or unset
3400 environment variables.
3402 - Added some tests for modulefinder.
3404 - Converted test_imp to use unittest.
3406 - Fix bsddb test_basics.test06_Transactions to check the version
3409 - test.test_support.catch_warning is a new context manager that can be
3410 used to catch the warnings issued by the warning framework.
3415 - Tools/scripts/reindent.py now creates the backup file using
3416 shutil.copy to preserve user/group and permissions. Added also a
3417 --nobackup option to not create the backup if the user is concerned
3418 regarding this. Check issue 1050828 for more details.
3420 - Tools/scripts/win_add2path.py was added. The simple script modifes
3421 the PATH environment var of the HKCU tree and adds the python bin
3422 and script directory.
3424 - Tools/18n/pygettext.py was added to the list of scripts installed by
3425 Tools/scripts/setup.py (tracker item 642309).
3427 - Added IronPython and Jython support to pybench (part of which was
3430 - Made some minor changes to pybench output to allow the user to see
3431 which Python version is running pybench.
3433 - Added support for the new platform module feature
3434 platform.python_implementation(); this will now be saved in the
3441 - RFE #1765140: Updated documentation on FileHandler and subclasses to
3442 include new optional delay argument.
3444 - Bug #932563: Added section on getting contextual information into
3445 logging output, and added documentation for the new LoggerAdapter
3448 - Bug #1295: Added information about caching of formatted exception
3449 information in the LogRecord by Formatter.format().
3451 - Bug #1637365: add subsection about "__name__ == __main__" to the
3454 - Patch #1698768: updated the "using Python on the Mac" intro.
3456 - Bug #1569057: Document that calling file.next() when the file is
3457 open for writing is undefined.
3459 - Patch #1489771: the syntax rules in Python Reference Manual were
3460 updated to reflect the current Python syntax.
3462 - Patch #1686451: Fix return type for
3463 PySequence_{Count,Index,Fast_GET_SIZE}.
3465 - Patch #1679379: add documentation for fnmatch.translate().
3467 - Bug #1629566: clarify the docs on the return values of parsedate()
3468 and parsedate_tz() in email.utils and rfc822.
3470 - Patch #1671450: add a section about subclassing builtin types to the
3471 "extending and embedding" tutorial.
3473 - Bug #1629125: fix wrong data type (int -> Py_ssize_t) in PyDict_Next
3476 - Bug #1565919: document set types in the Language Reference.
3478 - Bug #1546052: clarify that PyString_FromString(AndSize) copies the
3479 string pointed to by its parameter.
3481 - Bug #1566663: remove obsolete example from datetime docs.
3483 - Bug #1541682: Fix example in the "Refcount details" API docs.
3484 Additionally, remove a faulty example showing PySequence_SetItem
3485 applied to a newly created list object and add notes that this isn't
3492 - Patch #1552024: add decorator support to unparse.py demo script.
3494 - Make auto-generated python.vim file list built-ins and exceptions in
3495 alphatbetical order. Makes output more deterministic and easier to
3496 tell if the file is stale or not.
3498 - Bug #1546372: Fixed small bugglet in pybench that caused a missing
3499 file not to get reported properly.
3505 - Have the search path for building extensions follow the declared
3506 order in $CPPFLAGS and $LDFLAGS when adding directories from those
3507 environment variables.
3509 - Bug #1983: Added a check to pyport to verify that sizeof(pid_t) is
3510 smaller or equal sizeof(long).
3512 - Bug #1234: Fixed semaphore errors on AIX 5.2
3514 - Issue #1726: Remove Python/atof.c from PCBuild/pythoncore.vcproj.
3516 - Removed PCbuild8/ directory and added a new build directory for VS
3517 2005 based on the VS 2008 build directory to PC/VS8.0. The script
3518 PCbuild/vs8to9.py was added to sync changes from PCbuild to
3521 - Moved PCbuild/ directory for VS 2003 to PC/VS7.1 and renamed
3522 PCBuild9/ directory to PCBuild/.
3524 - Bug #1699: Define _BSD_SOURCE only on OpenBSD.
3526 - Bug #1608: use -fwrapv when GCC supports it. This is important,
3527 newer GCC versions may optimize away overflow buffer overflow checks
3528 without this option!
3530 - Patch #1418: Make the AC_REPLACE_FUNCS object files actually work.
3532 - Add a FAST_LOOPS build option that speeds-up looping by trading away
3533 periodic threadstate and signal checking in tight loops. By
3534 default, this option is turned-off. It should only be enabled in
3535 debugged, performance critical applications.
3537 - Patch #786737: Allow building in a tree of symlinks pointing to a
3540 - Bug #1737210: Change Manufacturer of Windows installer to PSF.
3542 - Bug #1746880: Correctly install DLLs into system32 folder on Win64.
3544 - Define _BSD_SOURCE, to get access to POSIX extensions on OpenBSD
3547 - Stop supporting AtheOS and cause a build error in configure for the
3550 - Bug #1655392: don't add -L/usr/lib/pythonX.Y/config to the LDFLAGS
3551 returned by python-config if Python was built with --enable-shared
3552 because that prevented the shared library from being used.
3554 - Patch #1569798: fix a bug in distutils when building Python from a
3555 directory within sys.exec_prefix.
3557 - Bug #1675511: Use -Kpic instead of -xcode=pic32 on Solaris/x86.
3559 - Disable _XOPEN_SOURCE on NetBSD 1.x.
3561 - configure now checks whether gcc supports the PyArg_ParseTuple
3564 - Bug #1578513: Cross compilation was broken by a change to configure.
3565 Repair so that it's back to how it was in 2.4.3.
3567 - Patch #1576954: Update VC6 build directory; remove redundant files
3570 - Bug #1568842: Fix test for uintptr_t.
3572 - Patch #1540470: for OpenBSD 4.0.
3574 - Fix build failure on kfreebsd and on the hurd.
3576 - Fix the build of the library reference in info format.
3578 - Allow Emacs 22 for building the documentation in info format.
3580 - Makefile.pre.in(buildbottest): Run an optional script
3581 pybuildbot.identify to include some information about the build
3588 - Unified naming convention for free lists and their limits. All free
3589 lists in Object/ are named ``free_list``, the counter ``numfree``
3590 and the upper limit is a macro ``PyName_MAXFREELIST`` inside an
3593 - ``PySet_Add()`` can now modify a newly created frozenset. Similarly
3594 to ``PyTuple_SetItem``, it can be used to populate a brand new
3595 frozenset; but it does not steal a reference to the added item.
3597 - Added ``PySet_Check()`` and ``PyFrozenSet_Check()`` to the set API.
3599 - Backport of PyUnicode_FromString(), _FromStringAndSize(), _Format
3600 and _FormatV from Python 3.0. Made PyLong_AsSsize_t and
3601 PyLong_FromSsize_t public functions.
3603 - Patch #1720595: add T_BOOL to the range of structmember types.
3605 - Issue #1534: Added ``PyFloat_GetMax()``, ``PyFloat_GetMin()`` and
3606 ``PyFloat_GetInfo()`` to the float API.
3608 - Issue #1521: On 64bit platforms, using PyArgs_ParseTuple with the t#
3609 of w# format code incorrectly truncated the length to an int, even
3610 when PY_SSIZE_T_CLEAN is set. The str.decode method used to return
3611 incorrect results with huge strings.
3613 - Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
3614 Py_TYPE and Py_REFCNT.
3616 - PEP 3123: Provide forward compatibility with Python 3.0, while
3617 keeping backwards compatibility. Add Py_Refcnt, Py_Type, Py_Size,
3618 and PyVarObject_HEAD_INIT.
3620 - Py_ssize_t fields work in structmember when HAVE_LONG_LONG is not
3623 - Patch #1733960: Allow T_LONGLONG to accept ints.
3625 - T_PYSSIZET can now be used in PyMemberDef lists for Py_ssize_t members.
3627 - Added a new API function ``PyImport_ImportModuleNoBlock``.
3629 - Bug #1637022: Prefix AST symbols with _Py_.
3631 - Fix some leftovers from the conversion from int to Py_ssize_t
3632 (relevant to strings and sequences of more than 2**31 items).
3634 - Make _PyGILState_NoteThreadState() static, it was not used anywhere
3635 outside of pystate.c and should not be necessary.
3637 - ``PyImport_Import`` and ``PyImport_ImportModule`` now always do
3638 absolute imports. In earlier versions they might have used relative
3639 imports under some conditions.
3641 - Added case insensitive comparison methods ``PyOS_stricmp(char*,
3642 char*)`` and ``PyOS_strnicmp(char*, char*, Py_ssize_t)``.
3644 - Bug #1542693: remove semi-colon at end of PyImport_ImportModuleEx
3645 macro so it can be used as an expression.
3651 - Patch #1706: Drop support for Win9x, WinME and NT4. Python now
3652 requires Windows 2000 or greater. The _WINVER and NTDDI_VERSION
3653 macros are set to Win2k for x86/32bit builds and WinXP for AMD64
3656 - Conditionalize definition of _CRT_SECURE_NO_DEPRECATE and
3657 _CRT_NONSTDC_NO_DEPRECATE.
3659 - Bug #1216: Restore support for Visual Studio 2002.
3665 - cfmfile now raises a DeprecationWarning.
3667 - buildtools now raises a DeprecationWarning.
3669 - Removed the macfs module. It had been deprecated since Python 2.5.
3670 This lead to the deprecation of macostools.touched() as it relied
3671 solely on macfs and was a no-op under OS X.
3675 **(For information about older versions, consult the HISTORY file.)**