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 #4971: Fix titlecase for characters that are their own
16 titlecase, but not their own uppercase.
18 - Issue #5835: Deprecate PyOS_ascii_formatd and replace it with
19 _PyOS_double_to_string or PyOS_double_to_string.
21 - Issue #5283: Setting __class__ in __del__ caused a segfault.
23 - Issue #5816: complex(repr(z)) now recovers z exactly, even when
24 z involves nans, infs or negative zeros.
26 - Implement PEP 378, Format Specifier for Thousands Separator, for
27 floats, ints, and longs.
29 - Issue #5515: 'n' formatting for ints, longs, and floats handles
30 leading zero formatting poorly.
32 - Issue #5772: For float.__format__, don't add a trailing ".0" if
33 we're using no type code and we have an exponent.
35 - Issue #3166: Make long -> float (and int -> float) conversions
38 - Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
41 - Issue #1869: fix a couple of minor round() issues. round(5e15+1)
42 was giving 5e15+2; round(-0.0) was losing the sign of the zero.
44 - Issue #5759: float() didn't call __float__ on str subclasses.
46 - Issue #5704: the "-3" command-line option now implies "-t".
48 - Issue #2170: refactored xml.dom.minidom.normalize, increasing both
49 its clarity and its speed.
51 - Issue #2396: the memoryview object was backported from Python 3.1.
53 - Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
54 when hitting the recursion limit under certain circumstances.
56 - Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.
58 - Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
59 the end sys.path, for compatibility with the system install of Python.
61 - Issue #4688: Add a heuristic so that tuples and dicts containing only
62 untrackable objects are not tracked by the garbage collector. This can
63 reduce the size of collections and therefore the garbage collection overhead
64 on long-running programs, depending on their particular use of datatypes.
66 - Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
67 improve its performance. Long divisions and remainder operations
68 are now between 50% and 150% faster.
70 - Issue #4258: Make it possible to use base 2**30 instead of base
71 2**15 for the internal representation of integers, for performance
72 reasons. Base 2**30 is enabled by default on 64-bit machines. Add
73 --enable-big-digits option to configure, which overrides the
74 default. Add sys.long_info structseq to provide information about
77 - Issue #4034: Fix weird attribute error messages of the traceback object. (As a
78 result traceback.__members__ no longer exists.)
80 - Issue #4474: PyUnicode_FromWideChar now converts characters outside
81 the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
82 and sizeof(Py_UNICODE) == 2.
84 - Issue #5237: Allow auto-numbered fields in str.format(). For
85 example: '{} {}'.format(1, 2) == '1 2'.
87 - Issue #3652: Make the 'line' argument for warnings.showwarning() a
88 requirement. Means the DeprecationWarning from Python 2.6 can go away.
90 - Issue #5247: Improve error message when unknown format codes are
91 used when using str.format() with str, unicode, long, int, and
94 - Running Python with the -3 option now also warns about classic division
97 - Issue #5260: Long integers now consume less memory: average
98 saving is 2 bytes per long on a 32-bit system and 6 bytes per long
101 - Issue #5186: Reduce hash collisions for objects with no __hash__ method by
102 rotating the object pointer by 4 bits to the right.
104 - Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
105 it now forces its argument to double before testing for infinity.
107 - Issue #4978: Passing keyword arguments as unicode strings is now allowed.
109 - Issue #1242657: the __len__() and __length_hint__() calls in several tools
110 were suppressing all exceptions. These include list(), filter(), map(),
111 zip(), and bytearray().
113 - os.ftruncate raises OSErrors instead of IOErrors for consistency with other os
116 - Issue #4991: Passing invalid file descriptors to io.FileIO now raises an
119 - Issue #4807: Port the _winreg module to Windows CE.
121 - Issue #4935: The overflow checking code in the expandtabs() method common
122 to str, bytes and bytearray could be optimized away by the compiler, letting
123 the interpreter segfault instead of raising an error.
125 - Issue #3720: Fix a crash when an iterator modifies its class and removes its
128 - Issue #4893: Use NT threading on CE.
130 - Issue #4915: Port sysmodule to Windows CE.
132 - Issue #4074: Change the criteria for doing a full garbage collection (i.e.
133 collecting the oldest generation) so that allocating lots of objects without
134 destroying them does not show quadratic performance. Based on a proposal by
136 http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
138 - Issue #4850: Change COUNT_ALLOCS variables to Py_ssize_t.
140 - Issue #1180193: When importing a module from a .pyc (or .pyo) file with
141 an existing .py counterpart, override the co_filename attributes of all
142 code objects if the original filename is obsolete (which can happen if the
143 file has been renamed, moved, or if it is accessed through different paths).
144 Patch by Ziga Seilnacht and Jean-Paul Calderone.
146 - Issue #4075: Use OutputDebugStringW in Py_FatalError.
148 - Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
149 file with `str' filename on Windows.
151 - Issue #3680: Reference cycles created through a dict, set or deque iterator
152 did not get collected.
154 - Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
155 where the tp_hash and tp_dict slots are both NULL.
157 - Issue #4764: With io.open, IOError.filename is set when trying to open a
158 directory on POSIX systems.
160 - Issue #4764: IOError.filename is set when trying to open a directory on POSIX
163 - Issue #4759: None is now allowed as the first argument of
164 bytearray.translate(). It was always allowed for bytes.translate().
166 - Added test case to ensure attempts to read from a file opened for writing
169 - Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
170 print elapsed times, not only when some objects are uncollectable /
171 unreachable. Original patch by Neil Schemenauer.
173 - Issue #3439: Add a bit_length method to int and long.
175 - Issue #2183: Simplify and optimize bytecode for list comprehensions.
176 Original patch by Neal Norwitz.
178 - Issue #4597: Fixed exception handling when the __exit__ function of a
179 context manager returns a value that cannot be converted to a bool.
181 - Issue #4597: Fixed several opcodes that weren't always propagating
184 - Issue #4445: Replace "sizeof(PyStringObject)" with
185 "offsetof(PyStringObject, ob_sval) + 1" when allocating memory for
186 str instances. On a typical machine this saves 3 bytes of memory
187 (on average) per string allocation.
189 - Issue #3996: On Windows, the PyOS_CheckStack function would cause the
190 interpreter to abort ("Fatal Python error: Could not reset the stack!")
191 instead of throwing a MemoryError.
193 - Issue #3689: The list reversed iterator now supports __length_hint__
194 instead of __len__. Behavior now matches other reversed iterators.
196 - Issue #4367: Python would segfault during compiling when the unicodedata
197 module couldn't be imported and \N escapes were present.
199 - Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
200 method on file objects with closefd=False. The file descriptor is still
201 kept open but the file object behaves like a closed file. The ``FileIO``
202 object also got a new readonly attribute ``closefd``.
204 - Issue #4348: Some bytearray methods returned that didn't cause any change to
205 the bytearray, returned the same bytearray instead of a copy.
207 - Issue #4317: Fixed a crash in the imageop.rgb2rgb8() function.
209 - Issue #4230: If ``__getattr__`` is a descriptor, it now functions correctly.
211 - Issue #4048: The parser module now correctly validates relative imports.
213 - Issue #4225: ``from __future__ import unicode_literals`` didn't work in an
216 - Issue #4176: Fixed a crash when pickling an object which ``__reduce__``
217 method does not return iterators for the 4th and 5th items.
219 - Issue #4209: Enabling unicode_literals and the print_function in the same
220 __future__ import didn't work.
222 - Using ``nonlocal`` as a variable name will now raise a Py3k SyntaxWarning
223 because it is a reserved word in 3.x.
225 - On windows, os.chdir given unicode was not working if GetCurrentDirectoryW
226 returned a path longer than MAX_PATH. (But It's doubtful this code path is
227 really executed because I cannot move to such directory on win2k)
229 - Issue #4069: When set.remove(element) is used with a set element, the element
230 is temporarily replaced with an equivalent frozenset. But the eventual
231 KeyError would always report the empty frozenset([]) as the missing key. Now
232 it correctly refers to the initial element.
234 - Issue #4509: Various issues surrounding resize of bytearray objects to
235 which there are buffer exports.
237 - Issue #4748: Lambda generators no longer return a value.
239 - Issue #3582: Use native TLS functions on Windows
241 - The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
243 - Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
246 - Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
247 to avoid compiler warnings.
249 - Issue #5705: os.setuid() would not accept values > 2**31-1 but pwd.getpwnam()
250 returned them on 64bit platforms.
255 - Issue #5810: Fixed Distutils test_build_scripts so it uses
256 sysconfig.get_config_vars.
258 - Issue #4951: Fixed failure in test_httpservers.
260 - Issue #3102: All global symbols that the _ctypes extension defines
261 are now prefixed with 'Py' or '_ctypes'.
263 - Issue #5041: ctypes does now allow pickling wide character.
265 - Issue #5812: For the two-argument form of the Fraction constructor,
266 Fraction(m, n), m and n are permitted to be arbitrary Rational
269 - Issue #5812: Fraction('1e6') is valid: more generally, any string
270 that's valid for float() is now valid for Fraction(), with the
271 exception of strings representing NaNs and infinities.
273 - Issue #5795: Fixed test_distutils failure on Debian ppc.
275 - Issue #5768: Fixed bug in Unicode output logic and test case for same.
277 - Issue #1161031: fix readwrite select flag handling: POLLPRI now
278 results in a handle_expt_event call, not handle_read_event, and POLLERR
279 and POLLNVAL now call handle_close, not handle_expt_event. Also,
280 dispatcher now has an 'ignore_log_types' attribute for suppressing
281 log messages, which is set to 'warning' by default.
283 - Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.
285 - Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
286 a value in SafeConfigParser.
288 - Issue #5732: added a new command in Distutils: check.
290 - Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
291 platforms. Initial patch by Paul Moore.
293 - Issue #2254: Fix CGIHTTPServer information disclosure. Relative paths are
294 now collapsed within the url properly before looking in cgi_directories.
296 - Issue #5095: Added bdist_msi to the list of bdist supported formats.
297 Initial fix by Steven Bethard.
299 - Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
300 Initial fix by Wayne Davison.
302 - Issue #5693: TestSuite.__iter__ can now be consistently overridden in subclasses.
304 - Issue #5694: removed spurious test output in Distutils (test_clean).
306 - Issue #5471: Fix os.path.expanduser() for $HOME set to '/'.
308 - Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
310 - Issue #1726172: fix IndexError in the case of and empty response in ftplib.
312 - Issue #2625: added missing iteritems() call to the for loop in
313 mailbox.MH.get_message().
315 - Issue #5585: Add the ability to call an initializer to mulitiprocessing.manager
316 so that users can install custom handlers/etc.
318 - Issue #3551: Patch multiprocessing to raise a proper exception if the size of the
319 object when writefile is called causes a ERROR_NO_SYSTEM_RESOURCES. Added docs
320 to note the limitation
322 - unittest.assertNotEqual() now uses the inequality operator (!=) instead
323 of the equality operator.
325 - Issue #5663: better failure messages for unittest asserts. Default assertTrue
326 and assertFalse messages are now useful. TestCase has a longMessage attribute.
327 This defaults to False, but if set to True useful error messages are shown in
328 addition to explicit messages passed to assert methods.
330 - Issue #3110: Add additional protect around SEM_VALUE_MAX for multiprocessing
332 - In Pdb, prevent the reassignment of __builtin__._ by sys.displayhook on
335 - Issue #4572: added SEEK_* symbolic constants to io module.
337 - Issue #1665206 (partially): Move imports in cgitb to the top of the module
338 instead of performing them in functions. Helps prevent import deadlocking in
341 - Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.
343 - Actually make the SimpleXMLRPCServer CGI handler work.
345 - Issue #2522: locale.format now checks its first argument to ensure it has
346 been passed only one pattern, avoiding mysterious errors where it appeared
347 that it was failing to do localization.
349 - Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
352 - Issue #5619: Multiprocessing children disobey the debug flag and causes
353 popups on windows buildbots. Patch applied to work around this issue.
355 - Issue #5632: Thread.ident was None for the main thread and threads not created
356 with the threading module.
358 - Issue #5400: Added patch for multiprocessing on netbsd compilation/support
360 - Issue #5387: Fixed mmap.move crash by integer overflow.
362 - Issue #5261: Patch multiprocessing's semaphore.c to support context
363 manager use: "with multiprocessing.Lock()" works now.
365 - Issue #5177: Multiprocessing's SocketListener class now uses
366 socket.SO_REUSEADDR on all connections so that the user no longer needs
367 to wait 120 seconds for the socket to expire.
369 - Adjusted _tkinter to compile without warnings when WITH_THREAD is not
370 defined (part of issue #5035).
372 - Issue #5561: Removed the sys.version_info shortcuts from platform's
373 python_version() and python_version_tuple() since they produced different
374 output compared to previous Python versions.
376 - Issue #1034053: unittest now supports skipping tests and expected failures.
378 - The unittest.TestCase.assertRaises() method now returns a context manager when
379 not given a callable so that code to be tested can be written inline using
382 - The unittest.TestCase.assertEqual() now displays the differences in lists,
383 tuples, dicts and sets on failure. Many new handy type and comparison
384 specific assert* methods have been added that fail with error messages
385 actually useful for debugging. Contributed in part by Google. [Issue #2578]
387 - Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
388 forever on incomplete input. That caused tarfile.open() to hang when used
389 with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
390 partial bzip2 compressed data.
392 - Issue #5536: urllib.urlretrieve makes sure to close the file it's writing to
393 even if an exception occurs.
395 - Issue #5381: Added object_pairs_hook to the json module. This allows
396 OrderedDicts to be built by the decoder.
398 - Issue #2110: Add support for thousands separator and 'n' type
399 specifier to Decimal.__format__
401 - Fix Decimal.__format__ bug that swapped the meanings of the '<' and
402 '>' alignment characters.
404 - Issue #1222: locale.format() bug when the thousands separator is a space
407 - Issue #5472: Fixed distutils.test_util tear down. Original patch by
410 - collections.deque() objects now have a read-only attribute called maxlen.
412 - Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
413 it is has been populated and properly configured in order to prevent
416 - Issue #4792: Prevent a segfault in _tkinter by using the
417 guaranteed to be safe interp argument given to the PythonCmd in place of
418 the Tcl interpreter taken from a PythonCmd_ClientData.
420 - Issue #5193: Guarantee that Tkinter.Text.search returns a string.
422 - Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
423 Original patch by Akira Kitada.
425 - Issue #5385: Fixed mmap crash after resize failure on windows.
427 - Issue #5179: Fixed subprocess handle leak on failure on windows.
429 - PEP 372: Added collections.OrderedDict().
431 - The _asdict() for method for namedtuples now returns an OrderedDict().
433 - The configparser module now defaults to using an ordered dictionary.
435 - Issue #4308: httplib.IncompleteRead's repr doesn't include all of the data all
438 - Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
439 import guess_extension`` was used.
441 - Issue #1733986: Fixed mmap crash in accessing elements of second map object
442 with same tagname but larger size than first map. (Windows)
444 - Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
447 - Issue #1533164: Installed but not listed *.pyo was breaking Distutils
450 - Issue #5378: added --quiet option to Distutils bdist_rpm command.
452 - Issue #5052: make Distutils compatible with 2.3 again.
454 - Deprecated methods of symtable.Symbol have been removed: is_keywordarg(),
455 is_vararg(), and is_in_tuple().
457 - Issue #5316: Fixed buildbot failures introduced by multiple inheritance
460 - Issue #5287: Add exception handling around findCaller() call to help out
463 - Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
464 The file was resized to wrong size.
466 - Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
468 - Issue #2279: distutils.sdist.add_defaults now add files
469 from the package_data and the data_files metadata.
471 - Issue #5257: refactored all tests in distutils, so they use
472 support.TempdirManager, to avoid writing in the tests directory.
474 - Issue #4524: distutils build_script command failed with --with-suffix=3.
475 Initial patch by Amaury Forgeot d'Arc.
477 - Issue #2461: added tests for distutils.util
479 - Issue #1008086: Fixed socket.inet_aton() to always return 4 bytes even on
480 LP64 platforms (most 64-bit Linux, bsd, unix systems).
482 - Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
483 function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
485 - Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
486 under NT and OS2. Patch by Philip Jenvey.
488 - Issue #5128: Make compileall properly inspect bytecode to determine if needs
489 to be recreated. This avoids a timing hole thanks to the old reliance on the
490 ctime of the files involved.
492 - Issue #5122: Synchronize tk load failure check to prevent a potential
495 - Issue #1818: collections.namedtuple() now supports a keyword argument
496 'rename' which lets invalid fieldnames be automatically converted to
497 positional names in the form, _1, _2, ...
499 - Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
501 - Issue #5170: Fixed Unicode output bug in logging and added test case.
502 This is a regression which did not occur in 2.5.
504 - Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
505 public documented method ``ZipImporter.get_filename()``.
507 - Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
508 the execution of packages by looking for and executing a ``__main__``
509 submodule when a package name is supplied. Initial patch by Andi
512 - Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
513 not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
514 Tkapp_Call when calling from a thread different than the one that created
515 the Tcl interpreter. Patch by Robert Hancock.
517 - Issue #1520877: Now distutils.sysconfig reads $AR from the
518 environment/Makefile. Patch by Douglas Greiman.
520 - Issue #4285: Change sys.version_info to be a named tuple. Patch by
523 - Issue #1276768: The verbose option was not used in the code of
524 distutils.file_util and distutils.dir_util.
526 - Issue #5132: Fixed trouble building extensions under Solaris with
527 --enabled-shared activated. Initial patch by Dave Peterson.
529 - Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
531 - Issue #2047: shutil.move() could believe that its destination path was
532 inside its source path if it began with the same letters (e.g. "src" vs.
535 - Issue #4920: Fixed .next() vs .__next__() issues in the ABCs for
536 Iterator and MutableSet.
538 - Added the ttk module. See issue #2983: Ttk support for Tkinter.
540 - Issue #5021: doctest.testfile() did not create __name__ and
541 collections.namedtuple() relied on __name__ being defined.
543 - Backport importlib from Python 3.1. Only the import_module() function has
544 been backported to help facilitate transitions from 2.7 to 3.1.
546 - Issue #1885: distutils. When running sdist with --formats=tar,gztar
547 the tar file was overriden by the gztar one.
549 - Issue #4863: distutils.mwerkscompiler has been removed.
551 - Added a new itertools functions: combinations_with_replacement()
554 - Issue #5032: added a step argument to itertools.count() and
555 allowed non-integer arguments.
557 - Fix and properly document the multiprocessing module's logging
558 support, expose the internal levels and provide proper usage
561 - Issue #1672332: fix unpickling of subnormal floats, which was
562 producing a ValueError on some platforms.
564 - Issue #3881: Help Tcl to load even when started through the
565 unreadable local symlink to "Program Files" on Vista.
567 - Issue #4710: Extract directories properly in the zipfile module;
568 allow adding directories to a zipfile.
570 - Issue #3807: _multiprocessing build fails when configure is passed
571 --without-threads argument. When this occurs, _multiprocessing will
572 be disabled, and not compiled.
574 - Issue #5008: When a file is opened in append mode with the new IO library,
575 do an explicit seek to the end of file (so that e.g. tell() returns the
576 file size rather than 0). This is consistent with the behaviour of the
577 traditional 2.x file object.
579 - Issue #5013: Fixed a bug in FileHandler which occurred when the delay
582 - Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
583 which inherited from numbers.py which did not have __slots__ defined. The
584 numbers hierarchy now has its own __slots__ declarations.
586 - Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
587 for *nix machines for negative handles and large int handles. Without this check
588 it is possible to segfault the interpreter.
590 - Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
593 - Issue #1225107: inspect.isclass() returned True for instances with a custom
596 - Issue #3997: zipfiles generated with more than 65536 files could not be
597 opened with other applications.
599 - Issue #1162154: inspect.getmembers() now skips attributes that raise
600 AttributeError, e.g. a __slots__ attribute which has not been set.
602 - Issue #1696199: Add collections.Counter() for rapid and convenient
605 - Issue #3860: GzipFile and BZ2File now support the context manager protocol.
607 - Issue #4272: Add an optional argument to the GzipFile constructor to override
608 the timestamp in the gzip stream. The default value remains the current time.
609 The information can be used by e.g. gunzip when decompressing. Patch by
612 - Restore Python 2.3 compatibility for decimal.py.
614 - Issue #1702551: distutils sdist was not excluding VCS directories under
615 Windows. Inital solution by Guy Dalberto.
617 - The _tkinter module functions "createfilehandler", "deletefilehandler",
618 "createtimerhandler", "mainloop", "dooneevent" and "quit" have been
619 deprecated for removal in 3.x
621 - Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
622 to the decimal module.
624 - Issue #4812: add missing underscore prefix to some internal-use-only
625 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
627 - Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
628 the function is not a generator.
630 - Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
631 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
633 - Issue #4646: distutils was choking on empty options arg in the setup
634 function. Original patch by Thomas Heller.
636 - Fractions.from_float() no longer loses precision for integers too big to
639 - Issue #4790: The nsmallest() and nlargest() functions in the heapq module
640 did unnecessary work in the common case where no key function was specified.
642 - Issue #3767: Convert Tk object to string in tkColorChooser.
644 - Issue #3248: Allow placing ScrolledText in a PanedWindow.
646 - Issue #4444: Allow assertRaises() to be used as a context handler, so that
647 the code under test can be written inline if more practical.
649 - Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
650 works as expected in the interactive environment.
652 - Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
655 - Issue #4400: .pypirc default generated file was broken in distutils.
657 - Issue #4736: io.BufferedRWPair's closed property now functions properly.
659 - Issue #3954: Fix a potential SystemError in _hotshot.logreader error
662 - Issue #4574: fix a crash in io.IncrementalNewlineDecoder when a carriage
663 return encodes to more than one byte in the source encoding (e.g. UTF-16)
664 and gets split on a chunk boundary.
666 - Issue #4223: inspect.getsource() will now correctly display source code
667 for packages loaded via zipimport (or any other conformant PEP 302
668 loader). Original patch by Alexander Belopolsky.
670 - Issue #4201: pdb can now access and display source code loaded via
671 zipimport (or any other conformant PEP 302 loader). Original patch by
672 Alexander Belopolsky.
674 - Issue #4197: doctests in modules loaded via zipimport (or any other PEP
675 302 conformant loader) will now work correctly in most cases (they
676 are still subject to the constraints that exist for all code running
677 from inside a module loaded via a PEP 302 loader and attempting to
678 perform IO operations based on __file__). Original patch by
679 Alexander Belopolsky.
681 - Issues #4082 and #4512: Add runpy support to zipimport in a manner that
682 allows backporting to maintenance branches. Original patch by
683 Alexander Belopolsky.
685 - Issue #4163: Use unicode-friendly word splitting in the textwrap functions
686 when given an unicode string.
688 - Issue #4616: TarFile.utime(): Restore directory times on Windows.
690 - Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
691 give correct results in the case where one argument is a quiet NaN
692 and the other is a finite number that requires rounding.
694 - Issue #1030250: Distutils created directories even when run with the
697 - Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
700 - Issue #4529: fix the parser module's validation of try-except-finally
703 - Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
704 not a malformed option.
706 - Added the subprocess.check_output() convenience function to get output
707 from a subprocess on success or raise an exception on error.
709 - Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
710 support unusual filenames (such as those containing semi-colons) in
711 Content-Disposition headers.
713 - Issue #4384: Added logging integration with warnings module using
714 captureWarnings(). This change includes a NullHandler which does nothing;
715 it will be of use to library developers who want to avoid the "No handlers
716 could be found for logger XXX" message which can appear if the library user
717 doesn't configure logging.
719 - Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
722 - Issue #4363: The uuid.uuid1() and uuid.uuid4() functions now work even if
723 the ctypes module is not present.
725 - FileIO's mode attribute now always includes ``"b"``.
727 - Issue #4116: Resolve member name conflict in ScrolledCanvas.__init__.
729 - httplib.HTTPConnection.putheader() now accepts an arbitrary number of values
730 for any header, matching what the documentation has claimed for a while.
732 - Issue #3774: Fixed an error when create a Tkinter menu item without command
735 - Fixed a modulefinder crash on certain relative imports.
737 - Issue #4150: Pdb's "up" command now works for generator frames in post-mortem
740 - Issue #4092: Return ArgInfo as promised in the documentation from
741 inspect.getargvalues.
743 - Issue #3935: Properly support list subclasses in bisect's C implementation.
745 - Issue #4014: Don't claim that Python has an Alpha release status, in addition
746 to claiming it is Mature.
748 - Issue #4730: Fixed the cPickle module to handle correctly astral characters
749 when protocol 0 is used.
751 - Issue #1594: MacOS.GetCreatorAndType now always returns a big-endian result,
752 to be consistent with Apple tools.
754 - Issue #900949: plat-mac/videoreader.py no longer relies on a non-existing
757 - Issue #16278952: plat-mac/videoreader.py now correctly imports MediaDescr
759 - Issue #1737832 : plat-mac/EasyDialog.py no longer uses the broken aepack
762 - Issue #1149804: macostools.mkdirs now even works when another process
763 creates one of the needed subdirectories.
765 - Issue #900506: added --no-zipimport flag to the bundlebuilder script
767 - Issue #841800: bundlebuilder now works with 'python -O'
769 - Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
770 biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
772 - Issue #5104: The socket module now raises OverflowError when 16-bit port and
773 protocol numbers are supplied outside the allowed 0-65536 range on bind()
776 - Issue #999042: The Python compiler now handles explict global statements
777 correctly (should be assigned using STORE_GLOBAL opcode).
779 - Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
780 new arguments introduced in 2.5.
782 - Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
783 makeunicodedata.py and regenerated the Unicode database (This fixes
784 u'\u1d79'.lower() == '\x00').
789 - Ttk demos added in Demo/tkinter/ttk/
791 - Issue #4677: add two list comprehension tests to pybench.
796 - Link the shared python library with $(MODLIBS).
798 - Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
800 - Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
802 - Issue #4895: Use _strdup on Windows CE.
804 - Issue #4472: "configure --enable-shared" now works on OSX
806 - Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
808 - Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
810 - Issue #4289: Remove Cancel button from AdvancedDlg.
812 - Issue #1656675: Register a drop handler for .py* files on Windows.
814 - Issue #4120: Exclude manifest from extension modules in VS2008.
816 - Issue #4091: Install pythonxy.dll in system32 again.
818 - Issue #4018: Disable "for me" installations on Vista.
820 - Issue #3758: Add ``patchcheck`` build target to .PHONY.
822 - Issue #4204: Fixed module build errors on FreeBSD 4.
827 - Issue #1419652: Change the first argument to PyImport_AppendInittab() to
828 ``const char *`` as the string is stored beyond the call.
830 - Some PyBytes_* aliases have been removed because they don't exist in 3.x.
832 - Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
833 for negative arguments. Previously, it raised TypeError.
835 - Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
837 - Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
838 the GIL is released, or owned by another thread.
840 - Issue #4122: On Windows, fix a compilation error when using the
841 Py_UNICODE_ISSPACE macro in an extension module.
843 - Issue #4293: Py_AddPendingCall is now thread safe and can be used for
844 asynchronous notifications to python from any thread. Documentation added.
849 - Issue #3745: Fix hashlib to always reject unicode and non buffer-api
850 supporting objects as input no matter how it was compiled (built in
851 implementations or external openssl library).
853 - Issue #4397: Fix occasional test_socket failure on OS X.
855 - Issue #4279: Fix build of parsermodule under Cygwin.
857 - Issue #4051: Prevent conflict of UNICODE macros in cPickle.
859 - Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
861 - Issue #1040026: Fix os.times result on systems where HZ is incorrect.
863 - Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
866 - Issue #4365: Add crtassem.h constants to the msvcrt module.
868 - Issue #4396: The parser module now correctly validates the with statement.
870 - Issue #5228: Make functools.partial objects can now be pickled.
875 - Issue #5354: New test support function import_fresh_module() makes
876 it easy to import both normal and optimised versions of modules.
877 test_heapq and test_warnings have been adjusted to use it, tests for
878 other modules with both C and Python implementations in the stdlib
879 can be adjusted to use it over time.
881 - Fix test_warnings to no longer reset the warnings filter.
883 - Fix test_logging to no longer reset the warnings filter.
885 - Issue #5635: Fix running test_sys with tracing enabled.
887 - regrtest no longer treats ImportError as equivalent to SkipTest. Imports
888 that should cause a test to be skipped are now done using import_module
889 from test support, which does the conversion.
891 - Issue #5083: New 'gui' resource for regrtest.
893 - Issue #5837: Certain sequences of calls to set() and unset() for
894 support.EnvironmentVarGuard objects restored the environment variables
895 incorrectly on __exit__.
898 What's New in Python 2.6 final
899 ==============================
901 *Release date: 01-Oct-2008*
906 - Issue #3967: Fixed a crash in the count() and find() methods of string-like
907 objects, when the "start" parameter is a huge value.
909 - Issue #3965: Fixed a crash on Windows when open() is given an invalid
910 filename or mode, and the filename is a unicode string.
912 - Bug #3951: Py_USING_MEMORY_DEBUGGER should not be enabled by default.
917 - Issue #3965: Allow repeated calls to turtle.Screen, by making it a
918 true singleton object.
920 - Issue #3895: It was possible to crash the interpreter when an external timer
921 was used with cProfile that returned an object that could not be converted
924 - Issue #3950: Made turtle respect scale factors.
926 - Issue #3547: Fixed ctypes structures bitfields of varying integer
929 - Issue #3879: A regression in urllib.getproxies_enviroment was fixed.
931 - Issue #3863: Disabled a unit test of fork being called from a thread
932 when running on platforms known to exhibit OS bugs when attempting that.
937 - Bug #3989: Package the 2to3 script (as 2to3.py) in the Windows
940 - Bug #3887: Package x64 version of CRT for AMD64 Windows binaries.
943 What's New in Python 2.6 release candidate 2?
944 =============================================
946 *Release date: 17-Sep-2008*
954 - Security Issue #2: imageop did not validate arguments correctly and could
955 segfault as a result.
957 - Issue #3886: Possible integer overflows in the _hashopenssl module were
963 - Issue #3850: recursion tests in Misc/find_recursion_limit.py can raise
964 AttributeError instead of RuntimeError, depending in which C API call
965 exactly the recursion limit is exceeded. Consequently, both exception types
966 are caught and silenced.
971 - Issue #3617: Include a licensing statement regarding the Microsoft
972 C runtime in the Windows installer.
975 What's New in Python 2.6 release candidate 1?
976 =============================================
978 *Release date: 12-Sep-2008*
983 - Issue #3642: Suppress warning in obmalloc when size_t is larger than uint.
985 - Issue #3743: In a few places, PY_FORMAT_SIZE_T was incorrectly used with
986 PyString_FromFormat or PyErr_Format to display size_t values. The macro
987 PY_FORMAT_SIZE_T is designed to select the correct format for the OS
988 ``printf`` function, whereas PyString_FromFormat has an independent
989 implementation and uses "%zd" on all platforms for size_t values.
990 This makes a difference on win64, where ``printf`` needs "%Id" to display
993 - Issue #3634: _weakref.ref(Exception).__init__() gave invalid return value on
996 - Issue #3777: long() applied to a float object now always return a long
997 object; previously an int would be returned for small values. the __long__
998 method is allowed to return either an int or a long, but the behaviour of
999 float objects should not change to respect backward compatibility.
1001 - Issue #3751: str.rpartition would perform a left-partition when called with
1004 - Issue #3683: Fix compilation when --without-threads is given.
1006 - Issue #3668: Fix a memory leak with the "s*" argument parser in
1007 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
1008 was correctly parsed but parsing of subsequent arguments failed.
1010 - Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
1011 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
1012 mechanism. In the process, fix a bug where isinstance() and issubclass(),
1013 when given a tuple of classes as second argument, were looking up
1014 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
1017 - Fix crashes on memory allocation failure found with failmalloc.
1019 - Fix memory leaks found with valgrind and update suppressions file.
1021 - Fix compiler warnings in opt mode which would lead to invalid memory reads.
1023 - Fix problem using wrong name in decimal module reported by pychecker.
1025 - Silenced another compiler warning about a used but not defined
1026 function 'stringlib_contains_obj'.
1028 - Added warnings on the use of ``__getslice__``, ``__setslice__``, or
1031 - Issue #3678: Correctly pass LDFLAGS and LDLAST to the linker on shared
1032 library targets in the Makefile.
1034 - Issue #1204: The configure script now tests for additional libraries
1035 that may be required when linking against readline. This fixes issues
1036 with x86_64 builds on some platforms (a few Linux flavors and OpenBSD).
1041 - Aliased PyObject_Bytes to PyObject_Str.
1046 - Issue #3640: Pickling a list or a dict uses less local variables, to reduce
1047 stack usage in the case of deeply nested objects.
1049 - Issue #3629: Fix sre "bytecode" validator for an end case.
1051 - Issue #3811: The Unicode database was updated to 5.1.
1053 - Issue #3781: Further warnings.catch_warnings() cleanup to prevent
1054 silent misbehaviour when a single instance is nested in multiple
1055 with statements, or when the methods are invoked in the wrong order.
1057 - Issue #3809: Fixed spurious 'test.blah' file left behind by test_logging.
1059 - Issue #3781: Clean up the API for warnings.catch_warnings() by having it
1060 return a list or None rather than a custom object.
1062 - Issue #1638033: Cookie.Morsel gained the httponly attribute.
1064 - Issue #3535: zipfile couldn't read some zip files larger than 2GB.
1066 - Issue #3776: Deprecate the bsddb package for removal in 3.0.
1068 - Issue #3762: platform.architecture() fails if python is lanched via
1071 - Issue #3772: Fixed regression problem in StreamHandler.emit().
1073 - Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
1074 to the urlparse one. Added a PendingDeprecationWarning in the old
1075 module, it will be deprecated in the future.
1077 - Issue #2562: Fix distutils PKG-INFO writing logic to allow having
1078 non-ascii characters and Unicode in setup.py meta-data.
1080 - Issue #3726: Allow spaces in separators in logging configuration files.
1082 - Issue #3719: platform.architecture() fails if there are spaces in the
1083 path to the Python binary.
1085 - Issue 3602: Moved test.test_support.catch_warning() to
1086 warnings.catch_warnings() along with some API cleanup. Expanding the tests
1087 for catch_warnings() also led to an improvement in the raising of a
1088 DeprecationWarning related to warnings.warn_explicit().
1090 - The deprecation warnings for the old camelCase threading API were removed.
1092 - logging: fixed lack of use of encoding attribute specified on a stream.
1094 - Silenced a trivial compiler warning in the sqlite module.
1096 - Fixed two format strings in the _collections module.
1098 - Issue #3703: _fileio.FileIO gave unhelpful error message when trying to open a
1101 - Issue #3708: os.urandom no longer goes into an infinite loop when passed a
1102 non-integer floating point number.
1104 - Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
1110 - Issue #4301: Patch the logging module to add processName support, remove
1111 _check_logger_class from multiprocessing.
1113 - Issue #2975: When compiling several extension modules with Visual Studio 2008
1114 from the same python interpreter, some environment variables would grow
1117 - Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
1118 exploitation of poor argument checking.
1120 - sqlite3: Changed docstring of iterdump() to mark method as "Non-standard".
1122 - Issue #3103: Reduced globals symbols used by sqlite3 module and made sure all
1123 remaining ones have "pysqlite_" prefix.
1125 - Issue #3846: Release the GIL during sqlite3_prepare calls. This improves
1126 concurrent access to the same SQLite database from multiple
1132 - Issue #3781: Add test.test_support.check_warnings() as a convenience
1133 wrapper for warnings.catch_warnings() that makes it easier to check
1134 that expected warning messages are being reported.
1136 - Issue #3796: Some tests functions were not enabled in test_float.
1138 - Issue #3768: Move test_py3kwarn over to the new API for catch_warnings().
1143 - Issue #3833: Use a different upgrade code for Win64 installers.
1145 - Issue #2271: Set SecureCustomProperties so that installation will properly
1146 use the TARGETDIR even for unprivileged users.
1148 - Allow passing the MSI file name to merge.py.
1150 - Issue #3758: Rename the 'check' target to 'patchcheck' so as to not clash
1151 with GNU build target guidelines.
1154 What's New in Python 2.6 beta 3?
1155 ================================
1157 *Release date: 20-Aug-2008*
1162 - Issue #1878: Remove Py_TPFLAGS_HAVE_VERSION_TAG from
1163 Py_TPFLAGS_DEFAULT when not building the core. This means 3rd party
1164 extensions do not automatically benefit from the class attribute
1165 cache; they will have to explicitly add Py_TPFLAGS_HAVE_VERSION_TAG
1166 to their tp_flags field if they care. This is a backwards
1167 compatibility feature; in 3.0, all types will use the cache by
1170 - Keyword arguments can now follow starred arguments. (``f(a, *args,
1171 keyword=23)`` is now valid syntax.)
1173 - ctypes function pointers that are COM methods have a boolean True
1176 - Issue #3139: Make buffer-interface thread-safe wrt. PyArg_ParseTuple,
1177 by denying s# to parse objects that have a releasebuffer procedure,
1180 - Issue #3537: Fix an assertion failure when an empty but presized dict
1181 object was stored in the freelist.
1183 - Issue #1481296: Make long(float('nan')) and int(float('nan')) raise
1184 ValueError consistently across platforms.
1186 - Issue #3479: On platforms where sizeof(int) is smaller than sizeof(long)
1187 (64bit Unix, for example), unichr() would truncate its argument and return
1188 u'\x00' for unichr(2**32). Now it properly raises an OverflowError.
1190 - Apply security patches from Apple.
1192 - Issue #2542: Now that issubclass() may call arbitrary code, ensure that
1193 PyErr_ExceptionMatches returns 0 when an exception occurs there.
1195 - Issue #1819: function calls with several named parameters are now on
1196 average 35% faster (as measured by pybench).
1198 - Issue #2378: An unexpected UnboundLocalError or NameError could appear when
1199 the python debugger steps into a class statement: the free variables (local
1200 variables defined in an outer scope) would be deleted from the outer scope.
1202 - Issue #2620: Overflow checking when allocating or reallocating memory
1203 was not always being done properly in some python types and extension
1204 modules. PyMem_MALLOC, PyMem_REALLOC, PyMem_NEW and PyMem_RESIZE have
1205 all been updated to perform better checks and places in the code that
1206 would previously leak memory on the error path when such an allocation
1207 failed have been fixed.
1212 - Issue #3612: Added some missing basic types in ctypes.wintypes.
1214 - The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
1215 symtable.Symbol have been deprecated for removal in 3.0 and the next release.
1217 - Issue #2234: distutils failed for some versions of the cygwin compiler. The
1218 version reported by these tools does not necessarily follow the python
1219 version numbering scheme, so the module is less strict when parsing it.
1221 - Issue #2235: Added Py3k warnings for types which will become unhashable
1222 under the stricter __hash__ inheritance rules in 3.0. Several types
1223 which did not meet the rules for hash invariants and were already
1224 unhashable in 3.0 have now been explicitly flagged as unhashable in
1225 2.6 as well (collections.Mapping, collections.Set, unittest.TestSuite,
1226 xml.dom.minidom.NamedNodeMap, numbers.Number, UserList.UserList)
1228 - Update __all__ for cookielib, csv, os, urllib2, and weakref to include things
1229 imported into the module but exposed as part of the module's API.
1231 - Remove an unneeded import of abc.ABCMeta from 'inspect'.
1233 - Remove unneeded imports of 'sys' and 'warnings' from 'io'.
1235 - Remove unneeded imports of 'warnings' from shelve, filecmp, and dummy_thread.
1237 - Issue #3575: Incremental decoder's decode function now takes bytearray
1238 by using 's*' instead of 't#'.
1240 - Issue #2222: Fixed reference leak when occurred os.rename()
1241 fails unicode conversion on 2nd parameter. (windows only)
1243 - Issue 2464. urllib2 now supports a malformation in the URL received
1246 - Silence the DeprecationWarning raised when importing mimetools in
1247 BaseHTTPServer, cgi (and rfc822), httplib.
1249 - Issue #2776: fixed small issue when handling an URL with double slash
1250 after a 302 response in the case of not going through a proxy.
1252 - Issue #2676: in the email package, content-type parsing was hanging on
1253 pathological input because of quadratic or exponential behaviour of a
1256 - Issue #3476: binary buffered reading through the new "io" library is now
1259 - Silence the DeprecationWarning of rfc822 when it is imported by mimetools
1260 since mimetools itself is deprecated. Because modules are cached, all
1261 subsequent imports of rfc822 will not raise a visible DeprecationWarning.
1263 - Issue #3134: shutil referenced undefined WindowsError symbol.
1265 - Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
1266 menu entries were not deleted.
1268 - Copied the implementation of reduce() to _functools.reduce() to have a
1269 version that did not raise a DeprecationWarning under -3.
1271 - Issue #3205: When iterating over a BZ2File fails allocating memory, raise
1272 a MemoryError rather than silently stop the iteration.
1274 - Issue #3487: sre "bytecode" validator. Passing invalid "re-bytecode"
1275 to _sre.compile() will now be rejected. This should not affect anybody
1276 since the re.compile() function never generates invalid re-bytecode.
1278 - Issue #3436: Make csv.DictReader's fieldnames attribute a property so that
1279 upon first access it can be automatically initialized from the csv file if
1280 it wasn't initialized during instantiation.
1282 - Issue #2338: Create imp.reload() to help with transitioning to Python 3.0 as
1283 the reload() built-in has been removed.
1285 - Changed code in the following modules/packages to remove warnings raised
1286 while running under the ``-3`` flag: aifc, asynchat, asyncore, bdb, bsddb,
1287 ConfigParser, cookielib, csv, difflib, distutils, DocXMLRPCServer, email,
1288 filecmp, fileinput, inspect, logging, modulefinder, pdb, pickle, profile,
1289 pstats, pydoc, re, rlcompleter, SimpleXMLRPCServer, shelve, socket,
1290 subprocess, sqlite3, tarfile, Tkinter, test.test_support, textwrap,
1291 threading, tokenize, traceback, urlparse, wsgiref, xml, xmlrpclib.
1293 - Issue #3039: Fix tarfile.TarFileCompat.writestr() which always
1294 raised an AttributeError.
1296 - Issue #2523: Fix quadratic behaviour when read()ing a binary file without
1297 asking for a specific length. This problem only affected files opened
1298 using the new "io" module, not the built-in open() function.
1300 - Issue #3449: Update decimal module to use most recent specification
1301 (v. 1.68) and tests (v. 2.58) from IBM.
1303 - Issue 3437: Bug fix in robotparser parsing of Allow: lines.
1305 - Issue 1592: Improve error reporting when operations are attempted
1308 - Deprecate the "ast" parser function aliases.
1310 - Issue #3120: On 64-bit Windows the subprocess module was truncating handles.
1312 - Issue #3303: Fix a crash in locale.strcoll() when calling it with
1315 - Issue #3302: Fix several crashes when calling locale's gettext functions
1316 with None arguments.
1318 - Issue #3389: Allow resolving dotted names for handlers in logging
1319 configuration files.
1321 - Deprecate the sunaudio module for removal in Python 3.0.
1323 - Issue #3394: zipfile.writestr sets external attributes when passed a
1324 file name rather than a ZipInfo instance, so files are extracted with
1325 mode 0600 rather than 000 under Unix.
1327 - Issue #1857: subprocess.Popen.poll gained an additional _deadstate keyword
1328 argument in python 2.5, this broke code that subclassed Popen to include its
1329 own poll method. Fixed my moving _deadstate to an _internal_poll method.
1334 - Generate the PatternGrammar pickle during "make install".
1339 - Issue #2235: the C API function PyObject_HashNotImplemented and its
1340 interaction with the tp_hash slot (added in 2.6b2) are now documented
1342 - Issue #643841: The language reference now provides more detailed
1343 coverage of the lookup process for special methods. The disclaimers
1344 regarding lack of coverage of new-style classes have also been
1345 removed, since the coverage is now fairly reasonable.
1348 What's New in Python 2.6 beta 2?
1349 ================================
1351 *Release date: 17-Jul-2008*
1356 - Issue #3156: Fix inconsistent behavior of the bytearray type: all
1357 its methods now allow for items objects that can be converted to
1358 an integer using operator.index().
1360 - Issue #3360: Fix incorrect parsing of '020000000000.0', which
1361 produced a ValueError instead of giving the correct float.
1363 - Issue #3083: Add alternate (#) formatting for bin, oct, hex output
1364 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
1366 - Issue #3008: the float type has a new instance method 'float.hex'
1367 and a new class method 'float.fromhex' to convert floating-point
1368 numbers to and from hexadecimal strings, respectively.
1370 - Issue #2235: __hash__ is once again inherited by default. To allow
1371 collections.Hashable to remain meaningful in the presence of the
1372 default hash implementation (object.__hash__), it is now possible
1373 to explicit block inheritance of hash by setting __hash__=None at
1374 the Python level, or tp_hash=PyObject_HashNotImplemented at the C
1377 - Issue #3221: Issue a RuntimeWarning instead of raising SystemError if
1378 the parent module cannot be found while performing an absolute import.
1379 This means that an incorrectly defined __package__ attribute will
1380 now only prevent relative imports in that module rather than causing
1381 all imports from that module to fail.
1383 - Issue #2517: Allow unicode messages in Exceptions again by correctly
1384 bypassing the instance dictionary when looking up __unicode__ on
1387 - Issue #3242: Fix a crash inside the print statement, if sys.stdout is
1388 set to a custom object whose write() method happens to install
1389 another file in sys.stdout.
1391 - Issue #3088: Corrected a race condition in classes derived from
1392 threading.local: the first member set by a thread could be saved in
1393 another thread's dictionary.
1395 - Issue #3004: Minor change to slice.indices(): the start and stop
1396 arguments are now treated identically, making the behaviour easier
1397 to describe and understand. For example, slice(None, -10,
1398 1).indices(9) now returns (0, 0, 1) instead of (0, -1, 1), and
1399 slice(None, 10, -1).indices(10) returns (9, 9, -1) instead of (9,
1402 - Issue #3219: Calling a function with repeated keyword arguments,
1403 f(a=2, a=23), would not cause a syntax error. This was a regression
1404 from 2.4 caused by the switch to the new compiler.
1406 - Issue #2862: Make int and float freelist management consistent with
1407 other freelists. Changes their CompactFreeList apis into
1408 ClearFreeList apis and calls them via gc.collect().
1413 - Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
1414 api functions without holding the GIL, which could lead to a fatal
1415 error when they failed.
1417 - Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
1419 - Issue #3395: fix reference in test_multiprocessing to old debugInfo method
1421 - Issue #3312: Fix two crashes in sqlite3.
1423 - Issue #1608818: Fix misbehavior in os.listdir() if readdir() fails.
1425 - Issue #3125: Remove copy_reg in multiprocessing and replace it with
1426 ForkingPickler.register() to resolve conflict with ctypes.
1428 - Issue #3090: Fixed ARCHFLAGS parsing on OS/X
1430 - Issue #3313: Fixed a crash when a failed dlopen() call does not set
1431 a valid dlerror() message.
1433 - Issue #3258: Fixed a crash when a ctypes POINTER type to an
1434 incomplete structure was created.
1436 - Issue #3339: dummy_thread.acquire() should not return None.
1438 - Issue #3285: Fractions from_float() and from_decimal() accept Integral arguments.
1440 - Issue #3301: Bisect module behaved badly when lo was negative.
1442 - Issue #839496: SimpleHTTPServer used to open text files in text mode. This is
1443 both unnecessary (HTTP allows text content to be sent in several forms) and
1444 wrong because the actual transmitted size could differ from the
1445 content-length. The problem had been corrected in the 2.4 branch, but never
1448 - Issue #2663: add filtering capability to shutil.copytree().
1450 - Issue #1622: Correct interpretation of various ZIP header fields.
1452 - Issue #1526: Allow more than 64k files to be added to Zip64 file.
1454 - Issue #1746: Correct handling of zipfile archive comments (previously
1455 archives with comments over 4k were flagged as invalid). Allow writing
1456 Zip files with archives by setting the 'comment' attribute of a ZipFile.
1458 - Issue #449227: The rlcompleter module now adds "(" to callable objects
1461 - Issue #3190: Pydoc now hides the automatic module attribute __package__ (the
1462 handling is now the same as that of other special attributes like __name__).
1464 - Issue #2885 (partial): The urllib.urlopen() function has been deprecated for
1465 removal in Python 3.0 in favor of urllib2.urlopen().
1467 - Issue #2113: Fix error in subprocess.Popen if the select system call is
1468 interrupted by a signal.
1470 - Issue #3309: Fix bz2.BZFile iterator to release its internal lock
1471 properly when raising an exception due to the bz2file being closed.
1472 Prevents a deadlock.
1474 - Issue #3094: httplib.HTTPSConnection Host: headers no longer include the
1475 redundant ":443" port number designation when the connection is using the
1476 default https port (443).
1478 - Issue #874900: after an os.fork() call the threading module state is cleaned
1479 up in the child process to prevent deadlock and report proper thread counts
1480 if the new process uses the threading module.
1485 - test.test_support.catch_warning now keeps track of all warnings it sees
1486 and is now better documented. Explicit unit tests for this context manager
1487 have been added to test_warnings.
1492 - Issue #3215: Build sqlite3 as sqlite3.dll, not sqlite3.pyd.
1498 - Document that robotparser has been renamed to urllib.robotparser in
1501 - Document that urlparse has been renamed to urllib.parse in Python 3.0.
1503 - Document that urllib2 is split across multiple modules and renamed in
1506 - Document that urllib is split across multiple modules and renamed in
1510 What's New in Python 2.6 beta 1?
1511 ================================
1513 *Release date: 18-June-2008*
1518 - Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
1519 argument being anything other than a dict or None. Also fixed a bug in error
1520 handling when 'message' and 'category' were both set to None, triggering a
1523 - Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
1524 holds the last (strong) reference to its referent.
1526 - Add future_builtins.ascii().
1528 - Several set methods now accept multiple arguments: update(), union(),
1529 intersection(), intersection_update(), difference(), and difference_update().
1531 - Issue #2898: Added sys.getsizeof() to retrieve size of objects in bytes.
1533 - New environment variable PYTHONIOENCODING.
1535 - Patch #2488: Add sys.maxsize.
1537 - Issue #2353: file.xreadlines() now emits a Py3k warning.
1539 - Issue #2863: generators now have a ``gen.__name__`` attribute that
1540 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
1541 ``func.func_code.co_name``. The repr() of a generator now also
1544 - Issue #2831: enumerate() now has a ``start`` argument.
1546 - Issue #2801: fix bug in the float.is_integer method where a
1547 ValueError was sometimes incorrectly raised.
1549 - Issue #2790: sys.flags was not properly exposing its bytes_warning
1552 - Issue #2196: hasattr() now lets exceptions which do not inherit
1553 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
1556 - Added checks for integer overflows, contributed by Google. Some are
1557 only available if asserts are left in the code, in cases where they
1558 can't be triggered from Python code.
1563 - Issue #1179: [CVE-2007-4965] Integer overflow in imageop module.
1565 - Issue #3116: marshal.dumps() had quadratic behavior for strings > 32Mb.
1567 - Issue #2138: Add factorial() to the math module.
1569 - The heapq module does comparisons using LT instead of LE. This
1570 makes its implementation match that used by list.sort().
1572 - Issue #2819: add full-precision summation function to math module,
1573 based on Hettinger's ASPN Python Cookbook recipe.
1575 - Issue #2592: delegate nb_index and the floor/truediv slots in
1578 - Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
1581 - Support for Windows 9x has been removed from the winsound module.
1583 - bsddb module updated to version 4.7.3.
1584 http://www.jcea.es/programacion/pybsddb.htm#bsddb3-4.7.3. This
1585 code should be compatible with Python 3.0.
1587 - Issue #2858: Fix potential memory corruption when
1588 bsddb.db.DBEnv.lock_get and other bsddb.db object constructors
1589 raised an exception.
1591 - Issue #2669: bsddb/__init__.py iteration no longer silently fails when
1592 the database has changed size during iteration. It now raises a
1593 RuntimeError in the same manner as a dictionary.
1595 - Issue #2870: cmathmodule.c compile error.
1597 - Added a threading.Thread.ident property.
1602 - logging.config: Removed out-of-date comment in _install_handlers and
1603 used issubclass in place of equality comparison of classes.
1605 - Issue #2722: Now the os.getcwd() supports very long path names.
1607 - Issue #2888: Fixed the behaviour of pprint when working with nested
1608 structures, to match the behaviour of 2.5 and 3.0 (now follows the common
1611 - Issue #1817: cgi now correctly handles the querystring on POST requests
1613 - Issue #3136: fileConfig()'s disabling of old loggers is now conditional via
1614 an optional disable_existing_loggers parameter, but the default value is
1615 such that the old behaviour is preserved. Thanks to Leandro Lucarella for
1618 - Issue #3126: StreamHandler and FileHandler check before calling "flush" and
1619 "close" that the stream object has these, using hasattr (thanks to bobf for
1622 - Issue #2912: platform.uname now tries to determine unknown information even if
1625 - The rfc822 module has been deprecated for removal in 3.0.
1627 - The mimetools module has been deprecated for removal in 3.0.
1629 - The ctypes.byref function now takes an optional second parameter
1630 which allows to specify an offset in bytes for the constructed
1631 pointer-like object.
1633 - Added the ast module.
1635 - Added the multiprocessing module, PEP 371.
1637 - Factored out the indentation cleaning from inspect.getdoc() into
1638 inspect.cleandoc() to ease standalone use.
1640 - Issue #1798: Add ctypes calling convention that allows safe access
1643 - Issue #2404: ctypes objects support the new pep3118 buffer interface.
1645 - Patch #2125: Add GetInteger and GetString methods for
1646 msilib.Record objects.
1648 - Issue #2782: The datetime module's strftime methods now accept
1649 unicode format strings just as time.strftime always has.
1651 - The sgmllib and htmllib modules have been deprecated for removal
1654 - Issue #3011: locale module alias table was updated to the latest
1655 version from the X.org locale.alias file.
1657 - Issue #1797 (partial fix): ctypes NULL function pointers have a
1658 False boolean value now.
1660 - Issue #2985: Allow 64-bit integer responses (``<i8>``) in XMLRPC
1663 - Issue #2877: The UserString.MutableString class has been removed in
1666 - Do not close external file objects passed to tarfile.open(mode='w:bz2')
1667 when the TarFile is closed.
1669 - Issue #2959: For consistency with other file-like objects, gzip's
1670 GzipFile.close() can now be called multiple times without raising
1673 - Issue #1390: Raise ValueError in toxml when an invalid comment would
1674 otherwise be produced.
1676 - Issue #2914: TimedRotatingFileHandler now takes an optional keyword
1677 argument "utc" to use UTC time rather than local time.
1679 - Issue #2929: TimedRotatingFileHandler was using the wrong path when
1680 deleting old log files (filename only instead of full path).
1682 - Issue #1775025: You can now specify zipfile members to open(),
1683 read() or extract() via a ZipInfo instance. This allows handling
1684 duplicate filenames in zipfiles.
1686 - Issue #961805: Fix Text.edit_modified() in Tkinter.
1688 - Issue #1793: Function ctypes.util.find_msvcrt() added that returns
1689 the name of the C runtime library that Python uses.
1690 ctypes.util.find_library(name) now call this function when name is
1693 - The statvfs module has been deprecated for removal in Python 3.0.
1695 - The sunaudiodev and SUNAUDIODEV modules have been deprecated for
1696 removal in Python 3.0.
1698 - The WAIT module from IRIX has been deprecated for removal in Python
1701 - The torgb module from IRIX has been deprecated for removal in Python
1704 - The SV module from IRIX has been deprecated for removal in Python
1707 - The readcd module from IRIX has been deprecated for removal in
1710 - The panelparser module from IRIX has been deprecated for removal in
1713 - The panel module from IRIX has been deprecated for removal in Python
1716 - The jpeg module from IRIX has been deprecated for removal in Python
1719 - The IOCTL module from IRIX has been deprecated for removal in Python
1722 - The IN module from IRIX has been deprecated for removal in Python
1725 - The imgfile module from IRIX has been deprecated for removal in
1728 - The GLWS module from IRIX has been deprecated for removal in Python
1731 - The GET module from IRIX has been deprecated for removal in Python
1734 - The fm module from IRIX has been deprecated for removal in Python
1737 - The FL, flp, and fl modules from IRIX have been deprecated for
1738 removal in Python 3.0.
1740 - The FILE module on IRIX has been deprecated for removal in Python
1743 - The ERRNO module on IRIX has been deprecated for removal in Python
1746 - The DEVICE, GL, gl, and cgen modules (which indirectly includes
1747 cgensupport) have been deprecated for removal in Python 3.0.
1749 - The CL, CL_old, and cl modules for IRIX have been deprecated for
1750 removal in Python 3.0.
1752 - The cdplayer module for IRIX has been deprecated for removal in
1755 - The cddb module for IRIX has been deprecated for removal in Python
1758 - The cd and CD modules for IRIX have been deprecated for removal in
1761 - The al and AL modules for IRIX have been deprecated for removal in
1764 - Issue #1713041: fix pprint's handling of maximum depth.
1766 - The timing module has been deprecated for removal in Python 3.0.
1768 - The sv module has been deprecated for removal in Python 3.0.
1770 - The multifile module has been deprecated as per PEP 4.
1772 - The imageop module has been deprecated for removal in Python 3.0.
1774 - Issue #2250: Exceptions raised during evaluation of names in
1775 rlcompleter's ``Completer.complete()`` method are now caught and
1778 - Issue #2659: Added ``break_on_hyphens`` option to textwrap
1781 - The mhlib module has been deprecated for removal in Python 3.0.
1783 - The linuxaudiodev module has been deprecated for removal in Python
1786 - The ihooks module has been deprecated for removal in Python 3.0.
1788 - The fpformat module has been deprecated for removal in Python 3.0.
1790 - The dl module has been deprecated for removal in Python 3.0.
1792 - The Canvas module has been deprecated for removal in Python 3.0.
1794 - The compiler package has been deprecated for removal in Python 3.0.
1796 - The Bastion and rexec modules have been deprecated for removal in
1799 - The bsddb185 module has been deprecated for removal in Python 3.0.
1801 - The pure module has been deprecated for removal in Python 3.0.
1803 - Issue #2487: change the semantics of math.ldexp(x, n) when n is too
1804 large to fit in a C long. ldexp(x, n) now returns a zero (with
1805 suitable sign) if n is large and negative; previously, it raised
1808 - The toaiff module has been deprecated for removal in Python 3.0.
1810 - The test.testall module has been deprecated for removal in Python
1813 - The new module has been deprecated for removal in Python 3.0.
1815 - The user module has been deprecated for removal in Python 3.0.
1817 - The stringold module has been deprecated for removal in Python 3.0.
1819 - The mutex module has been deprecated for removal in Python 3.0.
1821 - The imputil module has been deprecated for removal in Python 3.0.
1823 - test.test_support.catch_warning() gained a 'record' argument.
1825 - os.path.walk is deprecated in favor of os.walk.
1827 - pdb gained the "until" command.
1829 - The Mac Modules (including Carbon) have been deprecated for removal
1832 - Library: on MacOS X you can now set ``ARCHFLAGS`` in the shell
1833 environment to control the '-arch' flags that are used to build
1834 an extension. This was added for compatibility with Apple's build
1837 - The bundled OSX-specific copy of libbffi is now in sync with the version
1838 shipped with PyObjC 2.0 and includes support for x86_64 and ppc64 platforms.
1840 - The threading module gained aliases for names that will be removed in the
1846 - The Windows installer now includes Tk 8.5, bzip2 1.0.5, and SQLite 3.5.9.
1848 - Patch #1722225: Support QNX 6.
1850 - ``Lib/lib-old`` is now added to sys.path.
1852 - On MacOS X it is now possible to install the framework in 64-bit
1853 mode or even as a 4-way universal binary (that is, PPC, i386,
1854 PPC64 and x86_64 support in one binary).
1856 This is controlled by the configure argument ``--with-universal-archs``:
1858 - ``--with-universal-archs=all``: install 4-way universal
1860 - ``--with-universal-archs=32-bit``: install 2-way universal, 32-bit (the default)
1862 - ``--with-universal-archs=64-bit``: install 2-way universal, 64-bit
1864 This option should be used in combination with ``--enable-universalsdk=``.
1866 NOTE: 64-bit and 4-way builds are only suppported on Mac OS X 10.5 (or later).
1872 - Add ``PyType_Modified()`` as a public API to clear the type cache.
1874 - The PyBytes functions have been renamed to PyByteArray.
1876 - The PyString functions have been renamed to PyBytes. A batch of
1877 defines were added so that the linker still sees the original
1881 What's New in Python 2.6 alpha 3?
1882 =================================
1884 *Release date: 08-May-2008*
1889 - Issue #2719: backported the ``next()`` builtin from Python 3.
1891 - Issue #2681: The octal literal ``0o8`` was incorrecly acctepted. Now
1892 it properly raises a SyntaxError.
1894 - Issue #2617: Reserved -J and -X arguments for Jython, IronPython and
1895 other implementations of Python.
1897 - Implemented PEP 370: Per user site-packages directory.
1902 - Issue #2670: Fix a failure in urllib2.build_opener(), when passed
1903 two handlers that derive the same default base class.
1905 - Added kill, terminate and send_signal(sig) to subprocess.Popen.
1907 - Added phase(z) -> phi, polar(z) -> r, phi and rect(r, phi) -> z to
1910 - Four new methods were added to the math and cmath modules: acosh,
1911 asinh, atanh and log1p.
1913 - zlib.decompressobj().flush(value) no longer crashes the interpreter
1914 when passed a value less than or equal to zero.
1916 - Issue #1631171: Re-implement the 'warnings' module in C (the
1917 original Python code has been kept as backup). This will allow for
1918 using the 'warning's machinery in such places as the parser where
1919 use of pure Python code is not possible. Both the ``showarning()``
1920 and ``formatwarning()`` gain an optional 'line' argument which is
1921 not called by default for backwards-compatibility reasons. Setting
1922 ``warnings.showwarning()`` to an implementation that lacks support
1923 for the ``line`` argument will raise a DeprecationWarning.
1928 - The audiodev module has been deprecated for removal in Python 3.0.
1930 - Issue #2750: Add the 'json' package. Based on simplejson 1.9 and
1931 contributed by Bob Ippolito.
1933 - Issue #1734346: Support Unicode file names for zipfiles.
1935 - Issue #2581: distutils: Vista UAC/elevation support for
1938 - Issue #2635: Fix bug in 'fix_sentence_endings' textwrap.fill option,
1939 where an extra space was added after a word containing (but not
1940 ending in) '.', '!' or '?'.
1942 - Add from_buffer() and from_buffer_copy() class methods to ctypes
1945 - Issue #2682: ctypes callback functions no longer contain a cyclic
1946 reference to themselves.
1948 - The getpass module has been improved on Unix. It now uses /dev/tty
1949 by default and uses stderr instead of stdout. A GetPassWarning is
1950 issued when input echo cannot be controlled.
1952 - Issue #2014: Allow XML-RPC datetime objects to have dates before
1955 - Issue #2439: Added new function pkgutil.get_data(), which is a
1956 convenience wrapper for the PEP 302 get_data() API.
1958 - Issue #2616: The ctypes.pointer() and ctypes.POINTER() functions are
1959 now implemented in C for better performance.
1961 - Issue #2408: The ``_types`` module, which was used as in
1962 implementation detail of the public ``types`` module, has been
1963 removed and replaced by pure python code.
1965 - Issue #2513: distutils on Windows is now capable of cross-compiling
1966 extension modules between 32 and 64 bit platforms. See the distutls
1967 build documentation for more information.
1969 - Issue #815646: Individual file objects may now be used from multiple
1970 threads at once without fear of crashing the Python interpreter. If
1971 file.close() is called while an object is in use by another thread
1972 an IOError exception will be raised and the file will not be closed.
1974 - The bundled libffi copy is now in sync with the recently released
1975 libffi3.0.5 version, apart from some small changes to
1976 Modules/_ctypes/libffi/configure.ac.
1978 - Issue #2385: distutils.core.run_script() makes __file__ available,
1979 so the controlled environment will more closely mirror the typical
1980 script environment. This supports setup.py scripts that refer to
1986 - Issue #2550: The approach used by client/server code for obtaining
1987 ports to listen on in network-oriented tests has been refined in an
1988 effort to facilitate running multiple instances of the entire
1989 regression test suite in parallel without issue.
1990 test_support.bind_port() has been fixed such that it will always
1991 return a unique port -- which wasn't always the case with the
1992 previous implementation, especially if socket options had been set
1993 that affected address reuse (i.e. SO_REUSEADDR, SO_REUSEPORT). The
1994 new implementation of bind_port() will actually raise an exception
1995 if it is passed an AF_INET/SOCK_STREAM socket with either the
1996 SO_REUSEADDR or SO_REUSEPORT socket option set. Furthermore, if
1997 available, bind_port() will set the SO_EXCLUSIVEADDRUSE option on
1998 the socket it's been passed. This currently only applies to
1999 Windows. This option prevents any other sockets from binding to the
2000 host/port we've bound to, thus removing the possibility of the
2001 'non-deterministic' behaviour, as Microsoft puts it, that occurs
2002 when a second SOCK_STREAM socket binds and accepts to a host/port
2003 that's already been bound by another socket. The optional preferred
2004 port parameter to bind_port() has been removed. Under no
2005 circumstances should tests be hard coding ports!
2007 test_support.find_unused_port() has also been introduced, which will
2008 pass a temporary socket object to bind_port() in order to obtain an
2009 unused port. The temporary socket object is then closed and
2010 deleted, and the port is returned. This method should only be used
2011 for obtaining an unused port in order to pass to an external program
2012 (i.e. the -accept [port] argument to openssl's s_server mode) or as
2013 a parameter to a server-oriented class that doesn't give you direct
2014 access to the underlying socket used.
2016 Finally, test_support.HOST has been introduced, which should be used
2017 for the host argument of any relevant socket calls (i.e. bind and
2020 The following tests were updated to following the new conventions:
2021 test_socket, test_smtplib, test_asyncore, test_ssl, test_httplib,
2022 test_poplib, test_ftplib, test_telnetlib, test_socketserver,
2023 test_asynchat and test_socket_ssl.
2025 It is now possible for multiple instances of the regression test
2026 suite to run in parallel without issue.
2031 - Issue #1496032: On alpha, use -mieee when gcc is the compiler.
2033 - Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
2034 gcc is used as compiler.
2036 - Issue #2573: On MacOS X it is now possible to install the framework
2037 with a different name using --with-framework-name=NAME.
2042 - Added implementation of copysign, acosh, asinh, atanh and log1p to
2043 the new files Include/pymath.h and Python/pymath.h for platforms
2044 which provide the functions through their libm. The files also
2045 contains several helpers and constants for math.
2047 - Added a new convenience macro, PyErr_WarnPy3k, for issuing Py3k warnings.
2050 What's New in Python 2.6 alpha 2?
2051 =================================
2053 *Release date: 02-Apr-2008*
2058 - Issue #1733757: The interpreter would hang on shutdown if the
2059 tracing function set by sys.settrace is still active and happens to
2060 call threading.currentThread().
2062 - Patch #1442: properly report exceptions when the PYTHONSTARTUP file
2065 - The compilation of a class nested in another class used to leak one
2066 reference on the outer class name.
2068 - Patch #1810: compile() can now compile _ast trees as returned by
2069 ``compile(..., PyCF_ONLY_AST)``.
2071 - Patch #2426: Added sqlite3.Connection.iterdump method to allow easy
2072 dumping of databases. Contributed by Paul Kippes at PyCon 2008.
2074 - Patch #2477: Added from __future__ import unicode_literals.
2076 - Added backport of bytearray type.
2078 - Issue #2355: add Py3k warning for buffer().
2080 - Issue #1477: With narrow Unicode builds, the unicode escape sequence
2081 \Uxxxxxxxx did not accept values outside the Basic Multilingual
2082 Plane. This affected raw unicode literals and the
2083 'raw-unicode-escape' codec. Now UTF-16 surrogates are generated in
2084 this case, like normal unicode literals and the 'unicode-escape'
2087 - Issue #2348: add Py3k warning for file.softspace.
2089 - Issue #2346/#2347: add Py3k warnings for __methods__ and
2092 - Issue #2358: Add a Py3k warning on sys.exc_clear() usage.
2094 - Issue #2400: Allow relative imports to "import *".
2096 - Issue #1745: Backport print function with ``from __future__ import
2099 - Issue #2332: add new attribute names for instance method objects.
2100 The two changes are: im_self -> __self__ and im_func -> __func__
2102 - Issue #2379: Raise a Py3K warning for __getitem__ or __getslice__ on
2103 exception instances.
2105 - Issue #2371: Add a Py3k warning when catching an exception that
2106 doesn't derive from BaseException.
2108 - Issue #2341: Add a Py3k warning when raising an exception that
2109 doesn't derive from BaseException.
2111 - Issue #2321: use pymalloc for unicode object string data to reduce
2112 memory usage in some circumstances.
2114 - PEP 3127: octal literals now start with "0o". Old-style octal
2115 literals are still valid. There are binary literals with a prefix of
2116 "0b". This also affects int(x, 0).
2118 - Issue #2359: Adding deprecation warnings for array.{read,write}.
2120 - Issue #1779871: GNU gcc can now build Python on OS X because the
2121 flags -Wno-long-double, -no-cpp-precomp, and -mno-fused-madd are no
2124 - Add a warning when asserting a non-empty tuple which is always true.
2126 - Issue #2179: speed up with statement execution by storing the exit
2127 method on the stack instead of in a temporary variable (patch by
2130 - Issue #2238: Some syntax errors in *args and **kwargs expressions
2131 could give bogus error messages.
2133 - Issue #2143: Fix embedded readline() hang on SSL socket EOF.
2138 - Patch #2240: Implement signal.setitimer and signal.getitimer.
2143 - Issue #2315: logging.handlers: TimedRotatingFileHandler now accounts
2144 for daylight savings time in calculating the next rollover.
2146 - Issue #2316: logging.handlers: TimedRotatingFileHandler now
2147 calculates rollovers correctly even when nothing is logged for a
2150 - Issue #2317: logging.handlers: TimedRotatingFileHandler now uses
2151 improved logic for removing old files.
2153 - Issue #2495: tokenize.untokenize now inserts a space between two
2154 consecutive string literals; previously, ["" ""] was rendered as
2155 [""""], which is incorrect python code.
2157 - Issue #2248: return the result of the QUIT command. from
2160 - Backport of Python 3.0's io module.
2162 - Issue #2482: Make sure that the coefficient of a Decimal is always
2163 stored as a str instance, not as a unicode instance. This ensures
2164 that str(Decimal) is always an instance of str.
2166 - Issue #2478: fix failure of decimal.Decimal(0).sqrt()
2168 - Issue #2432: give DictReader the dialect and line_num attributes
2169 advertised in the docs.
2171 - Issue #2460: Make Ellipsis object copyable.
2173 - Issue #1681432: Add triangular distribution to the random module
2175 - Issue #2136: urllib2's auth handler now allows single-quoted realms
2176 in the WWW-Authenticate header.
2178 - Issue #2434: Enhanced platform.win32_ver() to also work on Python
2179 installation which do not have the win32all package installed.
2181 - Added support to platform.uname() to also report the machine and
2182 processor information on Windows XP and later. As a result,
2183 platform.machine() and platform.processor() will report this
2184 information as well.
2186 - The library implementing the 2to3 conversion, lib2to3, was added to
2187 the standard distribution.
2189 - Issue #1747858: Fix chown to work with large uid's and gid's on
2192 - Issue #1202: zlib.crc32 and zlib.adler32 no longer return different
2193 values on 32-bit vs. 64-bit python interpreters. Both were correct,
2194 but they now both return a signed integer object for consistency.
2196 - Issue #1158: add %f format (fractions of a second represented as
2197 microseconds) to datetime objects. Understood by both strptime and
2200 - Issue #705836: struct.pack(">f", x) now raises OverflowError on all
2201 platforms when x is too large to fit into an IEEE 754 float;
2202 previously it only raised OverflowError on non IEEE 754 platforms.
2204 - Issues #2166, #1741 and #1531505: now distutils deals with HOME
2205 correctly under win32
2207 - Patch #1858: distutils: added multiple server support in .pypirc
2209 - Issue #1106316: pdb.post_mortem()'s parameter, "traceback", is now
2210 optional: it defaults to the traceback of the exception that is
2211 currently being handled (is mandatory to be in the middle of an
2212 exception, otherwise it raises ValueError).
2214 - Issue #1193577: A .shutdown() method has been added to SocketServers
2215 which terminates the .serve_forever() loop.
2217 - Issue #2220: handle rlcompleter attribute match failure more
2220 - Issue #2225: py_compile, when executed as a script, now returns a
2221 non- zero status code if not all files could be compiled
2224 - Bug #1725737: In distutils' sdist, exclude RCS, CVS etc. also in the
2225 root directory, and also exclude .hg, .git, .bzr, and _darcs.
2227 - Issue #1872: The struct module typecode for _Bool has been changed
2230 - The bundled libffi copy is now in sync with the recently released
2231 libffi3.0.4 version, apart from some small changes to
2232 Modules/_ctypes/libffi/configure.ac. On OS X, preconfigured libffi
2233 files are used. On all linux systems the --with-system-ffi
2234 configure option defaults to "yes".
2236 - Issue #1577: shutil.move() now calls os.rename() if the destination
2237 is a directory instead of copying-then-remove-source.
2242 - test_nis no longer fails when test.test_support.verbose is true and
2243 NIS is not set up on the testing machine.
2245 - Output comparison tests are no longer supported.
2247 - Rewrite test_errno to use unittest and no longer be a no-op.
2249 - GHOP 234: Convert test_extcall to doctest.
2251 - GHOP 290: Convert test_dbm and test_dummy_threading to unittest.
2253 - GHOP 293: Convert test_strftime, test_getargs, and test_pep247 to
2256 - Issue #2055: Convert test_fcntl to unittest.
2258 - Issue 1960: Convert test_gdbm to unittest.
2260 - GHOP 294: Convert test_contains, test_crypt, and test_select to
2263 - GHOP 238: Convert test_tokenize to use doctest.
2265 - GHOP 237: Rewrite test_thread using unittest.
2267 - Patch #2232: os.tmpfile might fail on Windows if the user has no
2268 permission to create files in the root directory.
2273 - A new script 2to3 is now installed, to run the 2.x to 3.x converter.
2275 - Python/memmove.c and Python/strerror.c have been removed; both
2276 functions are in the C89 standard library.
2278 - Patch #2284: Add -x64 option to rt.bat.
2283 - Patch #2477: Added PyParser_ParseFileFlagsEx() and
2284 PyParser_ParseStringFlagsFilenameEx().
2287 What's New in Python 2.6 alpha 1?
2288 =================================
2290 *Release date: 29-Feb-2008*
2295 - Issue #2051: pyc and pyo files are no longer created with permission
2296 644. The mode is now inherited from the py file.
2298 - Issue #2067: file.__exit__() now calls subclasses' close() method.
2300 - Patch #1759: Backport of PEP 3129 class decorators.
2302 - Issue #1881: An internal parser limit has been increased. Also see
2303 issue 215555 for a discussion.
2305 - Added the future_builtins module, which contains hex() and oct().
2306 These are the PEP 3127 version of these functions, designed to be
2307 compatible with the hex() and oct() builtins from Python 3.0. They
2308 differ slightly in their output formats from the existing, unchanged
2309 Python 2.6 builtins. The expected usage of the future_builtins
2311 from future_builtins import hex, oct
2313 - Issue #1600: Modifed PyOS_ascii_formatd to use at most 2 digit
2314 exponents for exponents with absolute value < 100. Follows C99
2315 standard. This is a change on Windows, which would use 3 digits.
2316 Also, added 'n' to the formats that PyOS_ascii_formatd understands,
2317 so that any alterations it does to the resulting string will be
2318 available in stringlib/formatter.h (for float.__format__).
2320 - Implemented PEP 3101, Advanced String Formatting. This adds a new
2321 builtin format(); a format() method for str and unicode; a
2322 __format__() method to object, str, unicode, int, long, float, and
2323 datetime; the class string.Formatter; and the C API
2326 - Fixed several potential crashes, all caused by specially crafted
2327 __del__ methods exploiting objects in temporarily inconsistent
2330 - Issue #2115: Important speedup in setting __slot__ attributes. Also
2331 prevent a possible crash: an Abstract Base Class would try to access
2332 a slot on a registered virtual subclass.
2334 - Fixed repr() and str() of complex numbers with infinity or nan as
2335 real or imaginary part.
2337 - Clear all free lists during a gc.collect() of the highest generation
2338 in order to allow pymalloc to free more arenas. Python may give back
2339 memory to the OS earlier.
2341 - Issue #2045: Fix an infinite recursion triggered when printing a
2342 subclass of collections.defaultdict, if its default_factory is set
2345 - Fixed a minor memory leak in dictobject.c. The content of the free
2346 list was not freed on interpreter shutdown.
2348 - Limit free list of method and builtin function objects to 256
2351 - Patch #1953: Added ``sys._compact_freelists()`` and the C API
2352 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
2353 to compact the internal free lists of pre-allocted ints and floats.
2355 - Issue #1983: Fixed return type of fork(), fork1() and forkpty()
2356 calls. Python expected the return type int but the fork familie
2359 - Issue #1678380: Fix a bug that identifies 0j and -0j when they
2360 appear in the same code unit.
2362 - Issue #2025: Add tuple.count() and tuple.index() methods to comply
2363 with the collections.Sequence API.
2365 - Patch #1970 by Antoine Pitrou: Speedup unicode whitespace and
2368 - Added ``PyType_ClearCache()`` and ``sys._clear_type_cache`` to clear
2369 the internal lookup cache for ref leak tests.
2371 - Patch #1473257: generator objects gain a gi_code attribute. This is
2372 the same object as the func_code attribute of the function that
2373 produced the generator.
2375 - Issue #1920: "while 0" statements were completely removed by the
2376 compiler, even in the presence of an "else" clause, which is
2377 supposed to be run when the condition is false. Now the compiler
2378 correctly emits bytecode for the "else" suite.
2380 - A few crashers fixed: weakref_in_del.py (issue #1377858);
2381 loosing_dict_ref.py (issue #1303614, test67.py);
2382 borrowed_ref_[34].py (not in tracker).
2384 - Issue #1069410: The "can't load dll" message box on Windows is
2385 suppressed while an extension is loaded by calling SetErrorMode in
2386 dynload_win.c. The error is still reported properly.
2388 - Issue #1915: Python compiles with --enable-unicode=no again. However
2389 several extension methods and modules do not work without unicode
2392 - Issue #1882: when compiling code from a string, encoding cookies in the
2393 second line of code were not always recognized correctly.
2395 - Issue #1679: "0x" was taken as a valid integer literal.
2397 - Issue #1865: ``bytes`` as an alias for ``str`` and b"" as an alias "" were
2400 - sys.float_info / PyFloat_GetInfo: The floating point information
2401 object was converted from a dict to a specialized structseq object.
2403 - Patch #1816: Added sys.flags structseq. It exposes the status of
2404 most command line arguments and PYTHON* environment variables.
2406 - Objects/structseq.c: Implemented new structseq representation. The
2407 patch makes structseqs (e.g. the return value of os.stat) more
2410 - Patch #1700288: added a type attribute cache that caches method
2411 accesses, resulting in speedups in heavily object-oriented code.
2413 - Bug #1776: __import__() no longer accepts filenames on any platform.
2414 The first parameter to __import__() must be a valid module name.
2416 - Patch #1668: renamed THREADDEBUG envvar to PYTHONTHREADDEBUG.
2418 - Patch #602345: Add -B command line option, PYTHONDONTWRITEBYTECODE
2419 envvar and sys.dont_write_bytecode attribute. All these can be set
2420 to forbid Python to attempt to write compiled bytecode files.
2422 - Improve some exception messages when Windows fails to load an
2423 extension module. Now we get for example '%1 is not a valid Win32
2424 application' instead of 'error code 193'.
2426 - Bug #1481296: Fixed long(float('nan')) != 0L.
2428 - Issue #1640: Added math.isinf(x), math.isnan(x) and math.copysign(x,
2431 - Issue #1635: Platform independent creation and representation of NaN
2432 and INF. float("nan"), float("inf") and float("-inf") now work on
2433 every platform with IEEE 754 semantics.
2435 - Compiler now generates simpler and faster code for dictionary
2436 literals. The oparg for BUILD_MAP now indicates an estimated
2437 dictionary size. There is a new opcode, STORE_MAP, for adding
2438 entries to the dictionary.
2440 - Issue #1638: %zd configure test fails on Linux.
2442 - Issue #1620: New property decorator syntax was modifying the
2443 decorator in place instead of creating a new decorator object.
2445 - Issue #1538: Avoid copying string in split/rsplit if the split char
2448 - Issue #1553: An erroneous __length_hint__ can make list() raise a
2451 - PEP 366: Allow explicit relative imports when executing modules
2452 inside packages with the -m switch via a new module level
2453 __package__ attribute.
2455 - Issue #1402: Fix a crash on exit, when another thread is still
2456 running, and if the deallocation of its frames somehow calls the
2457 PyGILState_Ensure() / PyGILState_Release() functions.
2459 - Expose the Py_Py3kWarningFlag as sys.py3kwarning.
2461 - Issue #1445: Fix a SystemError when accessing the ``cell_contents``
2462 attribute of an empty cell object.
2464 - Issue #1460: The utf-7 incremental decoder did not accept truncated
2465 input. It now correctly saves its state between chunks of data.
2467 - Patch #1739468: Directories and zipfiles containing a __main__.py
2468 file can now be directly executed by passing their name to the
2469 interpreter. The directory/zipfile is automatically inserted as the
2470 first entry in sys.path.
2472 - Issue #1265: Fix a problem with sys.settrace, if the tracing
2473 function uses a generator expression when at the same time the
2474 executed code is closing a paused generator.
2476 - sets and frozensets now have an isdisjoint() method.
2478 - optimize the performance of builtin.sum().
2480 - Fix warnings found by the new version of the Coverity checker.
2482 - The enumerate() builtin function is no longer bounded to sequences
2483 smaller than LONG_MAX. Formerly, it raised an OverflowError. Now,
2484 automatically shifts from ints to longs.
2486 - Issue #1686386: Tuple's tp_repr did not take into account the
2487 possibility of having a self-referential tuple, which is possible
2488 from C code. Nor did object's tp_str consider that a type's tp_str
2489 could do something that could lead to an inifinite recursion.
2490 Py_ReprEnter() and Py_EnterRecursiveCall(), respectively, fixed the
2493 - Issue #1164: It was possible to trigger deadlock when using the
2494 'print' statement to write to a file since the GIL was not released
2495 as needed. Now PyObject_Print() does the right thing along with
2496 various tp_print implementations of the built-in types and those in
2497 the collections module.
2499 - Issue #1147: Exceptions were directly allowing string exceptions in
2500 their throw() method even though string exceptions no longer
2503 - Issue #1096: Prevent a segfault from getting the repr of a very
2504 deeply nested list by using the recursion counter.
2506 - Issue #1202533: Fix infinite recursion calls triggered by calls to
2507 PyObject_Call() never calling back out to Python code to trigger
2508 recursion depth updates/checks. Required the creation of a static
2509 RuntimeError instance in case normalizing an exception put the
2510 recursion check value past its limit. Fixes crashers
2511 infinite_rec_(1|2|4|5).py.
2513 - Patch #1031213: Decode source line in SyntaxErrors back to its
2514 original source encoding.
2516 - Patch #1673759: add a missing overflow check when formatting floats
2519 - Prevent expandtabs() on string and unicode objects from causing a
2520 segfault when a large width is passed on 32-bit platforms.
2522 - Issue #1733488: Fix compilation of bufferobject.c on AIX.
2524 - Issue #1722485: remove docstrings again when running with -OO.
2526 - Add new attribute names for function objects. All the func_* become
2527 __*__ attributes. (Some already existed, e.g., __doc__ and
2530 - Add -3 option to the interpreter to warn about features that are
2531 deprecated and will be changed/removed in Python 3.0.
2533 - Patch #1686487: you can now pass any mapping after '**' in function
2536 - except clauses may now be spelled either "except E, target:" or
2537 "except E as target:". This is to provide forwards compatibility
2540 - Deprecate BaseException.message as per PEP 352.
2542 - Issue #1303614: don't expose object's __dict__ when the dict is
2543 inherited from a builtin base.
2545 - When __slots__ are set to a unicode string, make it work the same as
2546 setting a plain string, ie don't expand to single letter identifiers.
2548 - Request #1191699: Slices can now be pickled.
2550 - Request #1193128: str.translate() now allows a None argument for
2551 translations that only remove characters without re-mapping the
2552 remaining characters.
2554 - Patch #1682205: a TypeError while unpacking an iterable is no longer
2555 masked by a generic one with the message "unpack non-sequence".
2557 - Remove unused file Python/fmod.c.
2559 - Bug #1683368: The object.__init__() and object.__new__() methods are
2560 now stricter in rejecting excess arguments. The only time when
2561 either allows excess arguments is when it is not overridden and the
2562 other one is. For backwards compatibility, when both are
2563 overridden, it is a deprecation warning (for now; maybe a Py3k
2564 warning later). Also, type.__init__() insists on the same signature
2565 as supported by type.__new__().
2567 - Patch #1675423: PyComplex_AsCComplex() now tries to convert an
2568 object to complex using its __complex__() method before falling back
2569 to the __float__() method. Therefore, the functions in the cmath
2570 module now can operate on objects that define a __complex__()
2573 - Patch #1623563: allow __class__ assignment for classes with
2574 __slots__. The old and the new class are still required to have the
2577 - Patch #1642547: Fix an error/crash when encountering syntax errors
2578 in complex if statements.
2580 - Patch #1462488: Python no longer segfaults when
2581 ``object.__reduce_ex__()`` is called with an object that is faking
2584 - Patch #1680015: Don't modify __slots__ tuple if it contains an
2587 - Patch #1444529: the builtin compile() now accepts keyword arguments.
2589 - Bug #1678647: write a newline after printing an exception in any
2590 case, even when converting the value to a string failed.
2592 - The dir() function has been extended to call the __dir__() method on
2593 its argument, if it exists. If not, it will work like before. This
2594 allows customizing the output of dir() in the presence of a
2597 - Patch #922167: Python no longer segfaults when faced with infinitely
2598 self-recursive reload() calls (as reported by bug #742342).
2600 - Patch #1675981: remove unreachable code from ``type.__new__()``
2603 - Patch #1491866: change the complex() constructor to allow
2604 parthensized forms. This means complex(repr(x)) now works instead of
2605 raising a ValueError.
2607 - Patch #703779: unset __file__ in __main__ after running a file. This
2608 makes the filenames the warning module prints much more sensible
2609 when a PYTHONSTARTUP file is used.
2611 - Variant of patch #697613: don't exit the interpreter on a SystemExit
2612 exception if the -i command line option or PYTHONINSPECT environment
2613 variable is given, but break into the interactive interpreter just
2614 like on other exceptions or normal program exit.
2616 - Patch #1638879: don't accept strings with embedded NUL bytes in
2619 - Bug #1674503: close the file opened by execfile() in an error
2622 - Patch #1674228: when assigning a slice (old-style), check for the
2623 sq_ass_slice instead of the sq_slice slot.
2625 - When printing an unraisable error, don't print exceptions. before
2626 the name. This duplicates the behavior whening normally printing
2629 - Bug #1653736: Properly discard third argument to
2630 slot_nb_inplace_power.
2632 - PEP 352: Raising a string exception now triggers a TypeError.
2633 Attempting to catch a string exception raises DeprecationWarning.
2635 - Bug #1377858: Fix the segfaulting of the interpreter when an object
2636 created a weakref on itself during a __del__ call for new-style
2637 classes (classic classes still have the bug).
2639 - Bug #1579370: Make PyTraceBack_Here use the current thread, not the
2640 frame's thread state.
2642 - patch #1630975: Fix crash when replacing sys.stdout in
2645 - Prevent seg fault on shutdown which could occur if an object raised
2648 - Bug #1566280: Explicitly invoke threading._shutdown from Py_Main, to
2649 avoid relying on atexit.
2651 - Bug #1590891: random.randrange don't return correct value for big
2654 - Patch #1586791: Better exception messages for some operations on
2655 strings, tuples and lists.
2657 - Bug #1067760: Deprecate passing floats to file.seek.
2659 - Bug #1591996: Correctly forward exception in instance_contains().
2661 - Bug #1588287: fix invalid assertion for `1,2` in debug builds.
2663 - Bug #1576657: when setting a KeyError for a tuple key, make sure
2664 that the tuple isn't used as the "exception arguments tuple".
2666 - Bug #1565514: SystemError not raised on too many nested blocks.
2668 - Bug #1576174: WindowsError now displays the windows error code
2669 again, no longer the posix error code.
2671 - Patch #1549049: Support long values in structmember, issue warnings
2672 if the assigned value for structmember fields gets truncated.
2674 - Update the peephole optimizer to remove more dead code (jumps after
2675 returns) and inline unconditional jumps to returns.
2677 - Bug #1545497: when given an explicit base, int() did ignore NULs
2678 embedded in the string to convert.
2680 - Bug #1569998: break inside a try statement (outside a loop) is now
2681 recognized and rejected.
2683 - list.pop(x) accepts any object x following the __index__ protocol.
2685 - A number of places, including integer negation and absolute value,
2686 were fixed to not rely on undefined behaviour of the C compiler
2689 - Bug #1566800: make sure that EnvironmentError can be called with any
2690 number of arguments, as was the case in Python 2.4.
2692 - Patch #1567691: super() and new.instancemethod() now don't accept
2693 keyword arguments any more (previously they accepted them, but
2696 - Fix a bug in the parser's future statement handling that led to
2697 "with" not being recognized as a keyword after, e.g., this
2698 statement: from __future__ import division, with_statement
2700 - Bug #1557232: fix seg fault with def f((((x)))) and def f(((x),)).
2702 - Fix %zd string formatting on Mac OS X so it prints negative numbers.
2704 - Allow exception instances to be directly sliced again.
2706 - Bug #1551432: Exceptions do not define an explicit __unicode__
2707 method. This allows calling unicode() on exceptions classes
2708 directly to succeed.
2710 - Bug #1542051: Exceptions now correctly call PyObject_GC_UnTrack.
2711 Also make sure that every exception class has __module__ set to
2714 - Bug #1550983: emit better error messages for erroneous relative
2715 imports (if not in package and if beyond toplevel package).
2717 - Overflow checking code in integer division ran afoul of new gcc
2718 optimizations. Changed to be more standard-conforming.
2720 - Patch #1542451: disallow continue anywhere under a finally.
2722 - Patch #1546288: fix seg fault in dict_equal due to ref counting bug.
2724 - The return tuple from str.rpartition(sep) is (tail, sep, head) where
2725 head is the original string if sep was not found.
2727 - Bug #1520864: unpacking singleton tuples in list comprehensions and
2728 generator expressions (x for x, in ... ) works again. Fixing this
2729 problem required changing the .pyc magic number. This means that
2730 .pyc files generated before 2.5c2 will be regenerated.
2732 - ``with`` and ``as`` are now keywords.
2734 - Bug #1664966: Fix crash in exec if Unicode filename can't be
2737 - Issue #1537: Changed GeneratorExit's base class from Exception to
2740 - Issue #1703448: A joined thread could show up in the
2741 threading.enumerate() list after the join() for a brief period until
2748 - Patch #2274: Add heapq.heappushpop().
2750 - Add inspect.isabstract(object) to fix bug #2223
2752 - Add a __format__ method to Decimal, to support PEP 3101.
2754 - Add a timing parameter when using trace.Trace to print out
2757 - Issue #1627: httplib now ignores negative Content-Length headers.
2759 - Issue #900744: If an invalid chunked-encoding header is sent by a
2760 server, httplib will now raise IncompleteRead and close the
2761 connection instead of raising ValueError.
2763 - Issue #1492: The content type of BaseHTTPServer error messages can
2766 - Issue #1781: ConfigParser now does not let you add the "default" section
2769 - Removed uses of dict.has_key() from distutils, and uses of
2770 callable() from copy_reg.py, so the interpreter now starts up
2771 without warnings when '-3' is given. More work like this needs to
2772 be done in the rest of the stdlib.
2774 - Issue #1916: added isgenerator() and isgeneratorfunction() to
2777 - Issue #1224: Fixed bad url parsing when path begins with double
2780 - ctypes instances that are not or do not contain pointers can now be
2783 - Patch #1966: Break infinite loop in httplib when the servers
2784 implements the chunked encoding incorrectly.
2786 - Rename rational.py to fractions.py and the rational.Rational class
2787 to fractions.Fraction, to avoid the name clash with the abstract
2788 base class numbers.Rational. See discussion in issue #1682.
2790 - The pickletools module now provides an optimize() function that
2791 eliminates unused PUT opcodes from a pickle string.
2793 - Patch #2021: Allow tempfile.NamedTemporaryFile and
2794 SpooledTemporaryFile to be used in with statements by correctly
2795 supporting the context management protocol.
2797 - Patch #1979: Add rich comparisons to Decimal, and make Decimal
2798 comparisons involving a NaN follow the IEEE 754 standard.
2800 - Issue #2004: tarfile.py: Use mode 0700 for temporary directories and
2801 default permissions for missing directories.
2803 - Issue #175006: The debugger used to skip the condition of a "while"
2804 statement after the first iteration. Now it correctly steps on the
2805 expression, and breakpoints on the "while" statement are honored on
2808 - Issue #1765140: add an optional delay argument to FileHandler and
2809 its subclasses. Defaults to false (existing behaviour), but if true,
2810 defers opening the file until the first call to emit().
2812 - The pprint module now supports sets and frozensets.
2814 - Issue #1221598: add optional callbacks to ftplib.FTP's storbinary()
2815 and storlines() methods. (Contributed by Phil Schwartz)
2817 - Issue #1715: include sub-extension modules in pydoc's text output.
2819 - Issue #1836: fix an off-by-one bug in TimedRotatingHandler's
2820 rollover time calculation.
2822 - Issue #1021: fix a bug to allow basicConfig to accept NOTSET as a
2825 - Issue #932563: add LoggerAdapter convenience class to make it easier
2826 to add contextual information in logging output.
2828 - Issue #1760556: fix a bug to avoid FileHandler throwing an exception
2831 - Bug #1530959: distutils' build command now uses different build
2832 directory when building extension modules against versions of Python
2833 compiled with ``--with-pydebug``.
2835 - Issue #1555501: move plistlib from plat-mac directory to general
2838 - Issue #1269: fix a bug in pstats.add_callers() and add a unit test
2841 - Issue #1669: don't allow shutil.rmtree() to be called on a symlink
2844 - Issue #1664522: in urllib, don't read non-existing directories in
2845 ftp mode, returning a 0-byte file -- raise an IOError instead.
2847 - Issue #856047: respect the ``no_proxy`` environment variable when
2848 using the ``http_proxy`` etc. environment variables in urllib.
2850 - Issue #1178141: add a getcode() method to the addinfourls that
2851 urllib.open() returns so that you can retrieve the HTTP status code.
2853 - Issue #1003: Fix zipfile decryption check, it would fail zip files
2854 with extended local headers.
2856 - Issue #1189216: Fix the zipfile module to work on archives with
2857 headers past the 2**31 byte boundary.
2859 - Issue #1336: fix a race condition in subprocess.Popen if the garbage
2860 collector kicked in at the wrong time that would cause the process
2861 to hang when the child wrote to stderr.
2863 - Issue #1146: fix how textwrap breaks a long word that would start in
2864 the last column of a line.
2866 - Issue #1693149: trace.py --ignore-module - accept multiple
2867 comma-separated modules to be given.
2869 - Issue #1822: MIMEMultipart.is_multipart() behaves correctly for a
2870 just-created (and empty) instance. Thanks Jonathan Share.
2872 - Issue #1861: Added an attribute to the sched module which returns an
2873 ordered list of upcoming events (displayed as named tuples).
2875 - Issue #1837: The queue module now also supports a LIFO queue and a
2878 - Patch #1048820: Add insert-mode editing to curses.textpad.Textbox
2879 (patch by Stefan Wehr). Also, fix an off-by-one bug in
2882 - Issue #1831: ctypes now raises a TypeError if conflicting positional
2883 and named arguments are passed to a Structure or Union initializer.
2884 When too many positional arguments are passed, also a TypeError is
2885 raised instead of a ValueError.
2887 - Convert the internal ctypes array type cache to a WeakValueDict so
2888 that array types do not live longer than needed.
2890 - Issue #1786: pdb should use its own stdin/stdout around an exec call
2891 and when creating a recursive instance.
2893 - Issue #1698398: ZipFile.printdir() crashed because the format string
2894 expected a tuple type of length six instead of time.struct_time
2897 - Issue #1780: The Decimal constructor now accepts arbitrary leading
2898 and trailing whitespace when constructing from a string.
2899 Context.create_decimal no longer accepts trailing newlines.
2901 - Decimal.as_tuple(), difflib.find_longest_match() and inspect
2902 functions that returned a tuple now return a named tuple.
2904 - Doctest now returns results as a named tuple for readability:
2905 (0, 7) --> TestResults(failed=0, attempted=7)
2907 - Issue #846388:q re.match is interruptible now, which is particularly
2908 good for long regular expression matches.
2910 - Patch #1137: allow setting buffer_size attribute on pyexpat Parser
2911 objects to set the character data buffer size.
2913 - Issue #1757: The hash of a Decimal instance is no longer affected by
2914 the current context.
2916 - Patch #467924: add ZipFile.extract() and ZipFile.extractall() in the
2919 - Issue #1646: Make socket support the TIPC protocol.
2921 - Bug #1742: return os.curdir from os.path.relpath() if both arguments
2922 are equal instead of raising an exception.
2924 - Patch #1637: fix urlparse for URLs like 'http://x.com?arg=/foo'.
2926 - Patch #1698: allow '@' in username parsed by urlparse.py.
2928 - Issue #1735: TarFile.extractall() now correctly sets directory
2929 permissions and times.
2931 - Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a mountpoint.
2933 - Bug #1687: Fxed plistlib.py restricts <integer> to Python int when
2936 - Issue #1700: Regular expression inline flags incorrectly handle
2937 certain unicode characters.
2939 - Issue #1689: PEP 3141, numeric abstract base classes.
2941 - Tk issue #1851526: Return results from Python callbacks to Tcl as
2944 - Issue #1642: Fix segfault in ctypes when trying to delete attributes.
2946 - Issue #1727780: Support loading pickles of random.Random objects
2947 created on 32-bit systems on 64-bit systems, and vice versa. As a
2948 consequence of the change, Random pickles created by Python 2.6
2949 cannot be loaded in Python 2.5.
2951 - Issue #1455: The distutils package now supports VS 2005 and VS 2008
2952 for both the msvccompiler and cygwincompiler.
2954 - Issue #1531: tarfile.py: Read fileobj from the current offset, do
2955 not seek to the start.
2957 - Issue #1534: Added a dictionary sys.float_info with information
2958 about the internal floating point type to the sys module.
2960 - Issue #1429818: patch for trace and doctest modules so they play
2963 - doctest made a bad assumption that a package's __loader__.get_data()
2964 method used universal newlines.
2966 - Issue #1705170: contextlib.contextmanager was still swallowing
2967 StopIteration in some cases. This should no longer happen.
2969 - Issue #1292: On alpha, arm, ppc, and s390 linux systems the
2970 --with-system-ffi configure option defaults to "yes".
2972 - IN module for FreeBSD 8 is added and preexisting FreeBSD 6 and 7
2975 - Issues #1181, #1287: unsetenv() is now called when the
2976 os.environ.pop() and os.environ.clear() methods are used.
2978 - ctypes will now work correctly on 32-bit systems when Python is
2979 configured with --with-system-ffi.
2981 - Patch #1203: ctypes now does work on OS X when Python is built with
2982 --disable-toolbox-glue.
2984 - collections.deque() now supports a "maxlen" argument.
2986 - itertools.count() is no longer bounded to LONG_MAX. Formerly, it
2987 raised an OverflowError. Now, automatically shifts from ints to
2990 - Added itertools.product() which forms the Cartesian product of the
2993 - Added itertools.combinations() and itertools.permutations().
2995 - Patch #1541463: optimize performance of cgi.FieldStorage operations.
2997 - Decimal is fully updated to the latest Decimal Specification
3000 - Bug #1153: repr.repr() now doesn't require set and dictionary items
3001 to be orderable to properly represent them.
3003 - A 'c_longdouble' type was added to the ctypes module.
3005 - Bug #1709599: Run test_1565150 only if the file system is NTFS.
3007 - When encountering a password-protected robots.txt file the
3008 RobotFileParser no longer prompts interactively for a username and
3009 password (bug 813986).
3011 - TarFile.__init__() no longer fails if no name argument is passed and
3012 the fileobj argument has no usable name attribute (e.g. StringIO).
3014 - The functools module now provides 'reduce', for forward
3015 compatibility with Python 3000.
3017 - Server-side SSL support and cert verification added, by Bill
3020 - socket.ssl deprecated; use new ssl module instead.
3022 - uuid creation is now threadsafe.
3024 - EUC-KR codec now handles the cheot-ga-keut composed make-up hangul
3027 - GB18030 codec now can encode additional two-byte characters that are
3030 - Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
3032 - Bug #1704793: Return UTF-16 pair if unicodedata.lookup cannot
3033 represent the result in a single character.
3035 - Bug #978833: Close https sockets by releasing the _ssl object.
3037 - Change location of the package index to pypi.python.org/pypi
3039 - Bug #1701409: Fix a segfault in printing ctypes.c_char_p and
3040 ctypes.c_wchar_p when they point to an invalid location. As a
3041 sideeffect the representation of these instances has changed.
3043 - tarfile.py: Added "exclude" keyword argument to TarFile.add().
3045 - Bug #1734723: Fix repr.Repr() so it doesn't ignore the maxtuple
3048 - The urlopen function of urllib2 now has an optional timeout
3049 parameter (note that it actually works with HTTP, HTTPS, FTP and
3052 - In ftplib, the FTP.ntransfercmd method, when in passive mode, now
3053 uses the socket.create_connection function, using the timeout
3054 specified at connection time.
3056 - Bug #1728403: Fix a bug that CJKCodecs StreamReader hangs when it
3057 reads a file that ends with incomplete sequence and sizehint
3058 argument for .read() is specified.
3060 - Bug #1730389: Change time.strptime() to use ``\s+`` instead of
3061 ``\s*`` when matching spaces in the specified format argument.
3063 - Bugs #1668596/#1720897: distutils now copies data files even if
3064 package_dir is empty.
3066 - sha now raises a DeprecationWarning upon import.
3068 - md5 now raises a DeprecationWarning upon import.
3070 - Issue #1385: The hmac module now computes the correct hmac when
3071 using hashes with a block size other than 64 bytes (such as sha384
3074 - mimify now raises a DeprecationWarning upon import.
3076 - MimeWriter now raises a DeprecationWarning upon import.
3078 - tarfile.py: Improved unicode support. Unicode input names are now
3079 officially supported. Added "errors" argument to the TarFile class.
3081 - urllib.ftpwrapper class now accepts an optional timeout.
3083 - shlex.split() now has an optional "posix" parameter.
3085 - The posixfile module now raises a DeprecationWarning.
3087 - Remove the gopherlib module. This also leads to the removal of
3088 gopher support in urllib/urllib2.
3090 - Fix bug in marshal where bad data would cause a segfault due to lack
3091 of an infinite recursion check.
3093 - Removed plat-freebsd2 and plat-freebsd3 directories (and IN.py in
3096 - HTML-escape the plain traceback in cgitb's HTML output, to prevent
3097 the traceback inadvertently or maliciously closing the comment and
3098 injecting HTML into the error page.
3100 - The popen2 module and os.popen* are deprecated. Use the subprocess
3103 - Added an optional credentials argument to SMTPHandler, for use with
3104 SMTP servers which require authentication.
3106 - Patch #1695948: Added optional timeout parameter to SocketHandler.
3108 - Bug #1652788: Minor fix for currentframe.
3110 - Patch #1598415: Added WatchedFileHandler to better support external
3111 log file rotation using e.g. newsyslog or logrotate. This handler is
3112 only useful in Unix/Linux environments.
3114 - Bug #1706381: Specifying the SWIG option "-c++" in the setup.py file
3115 (as opposed to the command line) will now write file names ending in
3118 - As specified in RFC 2616, an HTTP response like 2xx indicates that
3119 the client's request was successfully received, understood, and
3120 accepted. Now in these cases no error is raised in urllib (issue
3123 - Bug #1290505: time.strptime's internal cache of locale information
3124 is now properly recreated when the locale is changed.
3126 - Patch #1685563: remove (don't add) duplicate paths in
3127 distutils.MSVCCompiler.
3129 - Added a timeout parameter to the constructor of other protocols
3130 (telnetlib, ftplib, smtplib and poplib). This is second part of the
3131 work started with create_connection() and timeout in httplib, and
3132 closes patch #723312.
3134 - Patch #1676823: Added create_connection() to socket.py, which may be
3135 called with a timeout, and use it from httplib (whose HTTPConnection
3136 and HTTPSConnection now accept an optional timeout).
3138 - Bug #978833: Revert r50844, as it broke _socketobject.dup.
3140 - Bug #1675967: re patterns pickled with Python 2.4 and earlier can
3141 now be unpickled with Python 2.5 and newer.
3143 - Patch #1630118: add a SpooledTemporaryFile class to tempfile.py.
3145 - Patch #1273829: os.walk() now has a "followlinks" parameter. If set
3146 to True (which is not the default), it visits symlinks pointing to
3149 - Bug #1681228: the webbrowser module now correctly uses the default
3150 GNOME or KDE browser, depending on whether there is a session of one
3151 of those present. Also, it tries the Windows default browser before
3152 trying Mozilla variants.
3154 - Patch #1339796: add a relpath() function to os.path.
3156 - Patch #1681153: the wave module now closes a file object it opened if
3157 initialization failed.
3159 - Bug #767111: fix long-standing bug in urllib which caused an
3160 AttributeError instead of an IOError when the server's response
3161 didn't contain a valid HTTP status line.
3163 - Patch #957650: "%var%" environment variable references are now
3164 properly expanded in ntpath.expandvars(), also "~user" home
3165 directory references are recognized and handled on Windows.
3167 - Patch #1429539: pdb now correctly initializes the __main__ module
3168 for the debugged script, which means that imports from __main__ work
3171 - The nonobvious commands.getstatus() function is now deprecated.
3173 - Patch #1393667: pdb now has a "run" command which restarts the
3174 debugged Python program, optionally with different arguments.
3176 - Patch #1649190: Adding support for _Bool to ctypes as c_bool.
3178 - Patch #1530482: add pydoc.render_doc() which returns the
3179 documentation for a thing instead of paging it to stdout, which
3182 - Patch #1533909: the timeit module now accepts callables in addition
3183 to strings for the code to time and the setup code. Also added two
3184 convenience functions for instantiating a Timer and calling its
3187 - Patch #1537850: tempfile.NamedTemporaryFile now has a "delete"
3188 parameter which can be set to False to prevent the default
3189 delete-on-close behavior.
3191 - Patch #1581073: add a flag to textwrap that prevents the dropping of
3192 whitespace while wrapping.
3194 - Patch #1603688: ConfigParser.SafeConfigParser now checks values that
3195 are set for invalid interpolation sequences that would lead to
3196 errors on reading back those values.
3198 - Added support for the POSIX.1-2001 (pax) format to
3199 tarfile.py. Extended and cleaned up the test suite. Added a new
3202 - Patch #1449244: Support Unicode strings in
3203 email.message.Message.{set_charset,get_content_charset}.
3205 - Patch #1542681: add entries for "with", "as" and "CONTEXTMANAGERS"
3206 to pydoc's help keywords.
3208 - Patch #1555098: use str.join() instead of repeated string
3209 concatenation in robotparser.
3211 - Patch #1635454: the csv.DictWriter class now includes the offending
3212 field names in its exception message if you try to write a record
3213 with a dictionary containing fields not in the CSV field names list.
3215 - Patch #1668100: urllib2 now correctly raises URLError instead of
3216 OSError if accessing a local file via the file:// protocol fails.
3218 - Patch #1677862: Require a space or tab after import in .pth files.
3220 - Patch #1192590: Fix pdb's "ignore" and "condition" commands so they
3221 trap the IndexError caused by passing in an invalid breakpoint
3224 - Patch #1599845: Add an option to disable the implicit calls to
3225 server_bind() and server_activate() in the constructors for
3226 TCPServer, SimpleXMLRPCServer and DocXMLRPCServer.
3228 - Bug #1531963: Make SocketServer.TCPServer's server_address always be
3229 equal to calling getsockname() on the server's socket. Fixed by
3232 - Patch #742598: Add .timeout attribute to SocketServer that calls
3233 .handle_timeout() when no requests are received.
3235 - Bug #1651235: When a tuple was passed to a ctypes function call,
3236 Python would crash instead of raising an error.
3238 - Bug #1646630: ctypes.string_at(buf, 0) and ctypes.wstring_at(buf, 0)
3239 returned string up to the first NUL character.
3241 - Patch #957003: Implement smtplib.LMTP.
3243 - Patch #1481079: add support for HTTP_REFERER to CGIHTTPServer.
3245 - Patch #1675424: Added tests for uncovered code in the zipfile
3246 module. The KeyError raised by Zipfile.getinfo for nonexistent
3247 names now has a descriptive message.
3249 - Bug #1115886: os.path.splitext('.cshrc') gives now ('.cshrc', '').
3251 - unittest now verifies more of its assumptions. In particular,
3252 TestCase and TestSuite subclasses (not instances) are no longer
3253 accepted in TestSuite.addTest(). This should cause no
3254 incompatibility since it never made sense with ordinary subclasses
3255 -- the failure just occurred later, with a more cumbersome
3258 - Patch #787789: allow to pass custom TestRunner instances to
3259 unittest's main() function.
3261 - Patches #1550273, #1550272: fix a few bugs in unittest and add a
3262 comprehensive test suite for the module.
3264 - Patch #1001604: glob.glob() now returns unicode filenames if it was
3265 given a unicode argument and os.listdir() returns unicode filenames.
3267 - Patch #1673619: setup.py identifies extension modules it doesn't
3268 know how to build and those it knows how to build but that fail to
3271 - Patch #912410: Replace HTML entity references for attribute values
3274 - Patch #1663234: you can now run doctest on test files and modules
3275 using "python -m doctest [-v] filename ...".
3277 - Patch #1121142: Implement ZipFile.open.
3279 - Taught setup.py how to locate Berkeley DB on Macs using MacPorts.
3281 - Added heapq.merge() for merging sorted input streams.
3283 - Added collections.namedtuple() for assigning field names to tuples.
3285 - Added itertools.izip_longest().
3287 - Have the encoding package's search function dynamically import using
3288 absolute import semantics.
3290 - Patch #1647484: Renamed GzipFile's filename attribute to name.
3292 - Patch #1517891: Mode 'a' for ZipFile now creates the file if it
3295 - Patch #698833: Support file decryption in zipfile.
3297 - Patch #685268: Consider a package's __path__ in imputil.
3299 - Patch #1463026: Support default namespace in XMLGenerator.
3301 - Patch #1571379: Make trace's --ignore-dir facility work in the face
3302 of relative directory names.
3304 - Bug #1600860: Search for shared python library in LIBDIR, not
3305 lib/python/config, on "linux" and "gnu" systems.
3307 - Patch #1652681: tarfile.py: create nonexistent files in append mode
3308 and allow appending to empty files.
3310 - Bug #1124861: Automatically create pipes if GetStdHandle fails in
3313 - Patch #1634778: add missing encoding aliases for iso8859_15 and
3316 - Patch #1638243: the compiler package is now able to correctly
3317 compile a with statement; previously, executing code containing a
3318 with statement compiled by the compiler package crashed the
3321 - Bug #1643943: Fix time.strptime's support for the %U directive.
3323 - Patch #1507247: tarfile.py: use current umask for intermediate
3326 - Patch #1627441: close sockets properly in urllib2.
3328 - Bug #494589: make ntpath.expandvars behave according to its
3331 - Changed platform module API python_version_tuple() to actually
3332 return a tuple (it used to return a list).
3334 - Added new platform module APIs python_branch(), python_revision(),
3335 python_implementation() and linux_distribution().
3337 - Added support for IronPython and Jython to the platform module.
3339 - The sets module has been deprecated. Use the built-in set/frozenset
3342 - Bug #1610795: make ctypes.util.find_library work on BSD systems.
3344 - Fixes for 64-bit Windows: In ctypes.wintypes, correct the
3345 definitions of HANDLE, WPARAM, LPARAM data types. Make
3346 parameterless foreign function calls work.
3348 - The version number of the ctypes package changed to "1.1.0".
3350 - Bug #1627575: logging: Added _open() method to FileHandler which can
3351 be used to reopen files. The FileHandler instance now saves the
3352 encoding (which can be None) in an attribute called "encoding".
3354 - Bug #411881: logging.handlers: bare except clause removed from
3355 SMTPHandler.emit. Now, only ImportError is trapped.
3357 - Bug #411881: logging.handlers: bare except clause removed from
3358 SocketHandler.createSocket. Now, only socket.error is trapped.
3360 - Bug #411881: logging: bare except clause removed from
3361 LogRecord.__init__. Now, only ValueError, TypeError and
3362 AttributeError are trapped.
3364 - Patch #1504073: Fix tarfile.open() for mode "r" with a fileobj
3367 - Patch #1182394 from Shane Holloway: speed up HMAC.hexdigest.
3369 - Patch #1262036: Prevent TarFiles from being added to themselves
3370 under certain conditions.
3372 - Patch #1230446: tarfile.py: fix ExFileObject so that read() and
3373 tell() work correctly together with readline().
3375 - Patch #1484695: The tarfile module now raises a HeaderError
3376 exception if a buffer given to frombuf() is invalid.
3378 - Bug #1503765: Fix a problem in logging.config with spaces in comma-
3379 separated lists read from logging config files.
3381 - Patch #1604907: Fix problems in logging.handlers caused at logging
3382 shutdown when syslog handlers fail to initialize because of syslogd
3385 - Patch #1608267: fix a race condition in os.makedirs() if the
3386 directory to be created is already there.
3388 - Patch #1610437: fix a tarfile bug with long filename headers.
3390 - Patch #1371075: Make ConfigParser accept optional dict type for
3391 ordering, sorting, etc.
3393 - Bug #1563807: _ctypes built on AIX fails with ld ffi error.
3395 - Bug #1598620: A ctypes Structure cannot contain itself.
3397 - Patch #1070046: Marshal new-style objects like InstanceType in
3400 - cStringIO.truncate(-1) now raises an IOError, like StringIO and
3403 - Patch #1472877: Fix Tix subwidget name resolution.
3405 - Patch #1594554: Always close a tkSimpleDialog on ok(), even if an
3408 - Patch #1538878: Don't make tkSimpleDialog dialogs transient if the
3409 parent window is withdrawn.
3411 - Bug #1597824: return the registered function from atexit.register()
3412 to facilitate usage as a decorator.
3414 - Patch #1360200: Use unmangled_version RPM spec field to deal with
3417 - Patch #1359217: Process 2xx response in an ftplib transfer that
3418 precedes an 1xx response.
3420 - Patch #1355023: support whence argument for GzipFile.seek.
3422 - Patch #1065257: Support passing open files as body in
3423 HTTPConnection.request().
3425 - Bug #1569790: mailbox.py: Maildir.get_folder() and MH.get_folder()
3426 weren't passing the message factory on to newly created Maildir/MH
3429 - Patch #1514543: mailbox.py: In the Maildir class, report errors if
3430 there's a filename clash instead of possibly losing a message.
3431 (Patch by David Watson.)
3433 - Patch #1514544: Try to ensure that messages/indexes have been
3434 physically written to disk after calling .flush() or
3435 .close(). (Patch by David Watson.)
3437 - Patch #1592250: Add elide argument to Tkinter.Text.search.
3439 - Patch #838546: Make terminal become controlling in pty.fork().
3441 - Patch #1351744: Add askyesnocancel helper for tkMessageBox.
3443 - Patch #1060577: Extract list of RPM files from spec file in
3446 - Bug #1586613: fix zlib and bz2 codecs' incremental en/decoders.
3448 - Patch #1583880: fix tarfile's problems with long names and posix/
3451 - Bug #1586448: the compiler module now emits the same bytecode for
3452 list comprehensions as the builtin compiler, using the LIST_APPEND
3455 - Fix codecs.EncodedFile which did not use file_encoding in 2.5.0, and
3456 fix all codecs file wrappers to work correctly with the "with"
3457 statement (bug #1586513).
3459 - Lib/modulefinder.py now handles absolute and relative imports
3462 - Patch #1567274: Support SMTP over TLS.
3464 - Patch #1560695: Add .note.GNU-stack to ctypes' sysv.S so that ctypes
3465 isn't considered as requiring executable stacks.
3467 - ctypes callback functions only support 'fundamental' data types as
3468 result type. Raise an error when something else is used. This is a
3469 partial fix for Bug #1574584.
3471 - Fix turtle so that time.sleep is imported for the entire library.
3472 Allows the demo2 function to be executed on its own instead of only
3473 when the module is run as a script.
3475 - Bug #813342: Start the IDLE subprocess with -Qnew if the parent is
3476 started with that option.
3478 - Bug #1565150: Fix subsecond processing for os.utime on Windows.
3480 - Support for MSVC 8 was added to bdist_wininst.
3482 - Bug #1446043: correctly raise a LookupError if an encoding name
3483 given to encodings.search_function() contains a dot.
3485 - Bug #1560617: in pyclbr, return full module name not only for
3486 classes, but also for functions.
3488 - Bug #1457823: cgi.(Sv)FormContentDict's constructor now takes
3489 keep_blank_values and strict_parsing keyword arguments.
3491 - Bug #1566602: correct failure of posixpath unittest when $HOME ends
3494 - Bug #1565661: in webbrowser, split() the command for the default
3495 GNOME browser in case it is a command with args.
3497 - Made the error message for time.strptime when the data data and
3498 format do match be more clear.
3500 - Fix a bug in traceback.format_exception_only() that led to an error
3501 being raised when print_exc() was called without an exception set.
3502 In version 2.4, this printed "None", restored that behavior.
3504 - Make webbrowser.BackgroundBrowser usable in Windows (it wasn't
3505 because the close_fds arg to subprocess.Popen is not supported).
3507 - Reverted patch #1504333 to sgmllib because it introduced an infinite
3510 - Patch #1553314: Fix the inspect.py slowdown that was hurting IPython
3511 & SAGE by adding smarter caching in inspect.getmodule()
3513 - Fix missing import of the types module in logging.config.
3515 - Patch #1550886: Fix decimal module context management implementation
3516 to match the localcontext() example from PEP 343.
3518 - Bug #1545341: The 'classifier' keyword argument to the Distutils
3519 setup() function now accepts tuples as well as lists.
3521 - Bug #1541863: uuid.uuid1 failed to generate unique identifiers on
3522 systems with low clock resolution.
3524 - Bug #1531862: Do not close standard file descriptors in subprocess.
3526 - idle: Honor the "Cancel" action in the save dialog (Debian bug
3529 - Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
3530 the first chunk fed to the decoder started with a BOM, but was
3531 longer than 3 bytes.
3533 - The implementation of UnicodeError objects has been simplified
3534 (start and end attributes are now stored directly as Py_ssize_t
3537 - Issue #829951: In the smtplib module, SMTP.starttls() now complies
3538 with RFC 3207 and forgets any knowledge obtained from the server not
3539 obtained from the TLS negotiation itself. Patch contributed by Bill
3542 - Issue #1339: The smtplib.SMTP class has been refactored a bit such
3543 that the SMTP.starttls() caller no longer needs to call ehlo()
3544 beforehand. SMTP.starttls() now raises an exception of the server
3545 does not claim to support starttls. Adds the
3546 SMTP.ehlo_or_helo_if_needed() method. Patch contributed by Bill
3549 - Patch #1089358: Add signal.siginterrupt, a wrapper around
3555 - Patch #1657: added select.epoll and select.kqueue.
3557 - Patch #1506171: added operator.methodcaller().
3559 - Patch #1826: operator.attrgetter() now supports dotted attribute paths.
3561 - Patch #1957: syslogmodule: Release GIL when calling syslog(3).
3563 - Bug #2112: mmap.error is now a subclass of EnvironmentError and not
3564 a direct EnvironmentError.
3566 - Bug #2111: mmap segfaults when trying to write a block opened with
3569 - Bug #2063: correct order of utime and stime in os.times() result on
3572 - Patch #1736: Fix file name handling of _msi.FCICreate.
3574 - Updated ``big5hkscs`` codec to the HKSCS revision of 2004.
3576 - Issue #1940: make it possible to use curses.filter() before
3577 curses.initscr() as the documentation says.
3579 - Backport of _fileio module from Python 3.0.
3581 - Patch #1087741: mmap.mmap is now a class, not a factory function. It
3582 is also subclassable now.
3584 - Patch #1648: added ``sys.getprofile()`` and ``sys.gettrace()``.
3586 - Patch #1663329: added ``os.closerange()`` function to quickly close
3587 a range of file descriptors without considering errors.
3589 - Patch #976880: ``mmap`` objects now have an ``rfind`` method that
3590 works as expected. ``mmap.find`` also takes an optional ``end``
3593 - _winreg's HKEY object has gained __enter__ and __exit__ methods to
3594 support the context manager protocol. The _winreg module also
3595 gained a new function ``ExpandEnvironmentStrings`` to expand
3598 - itertools.starmap() now accepts any iterable input. Previously, it
3599 required the function inputs to be tuples.
3601 - itertools.chain() now has an alternate constructor,
3602 chain.from_iterable().
3604 - Issue #1646: Make socket support TIPC. The socket module now has
3605 support for TIPC under Linux, see http://tipc.sf.net/ for more
3608 - Added interface for Windows' WSAIoctl to socket object and added an
3609 example for a simple network sniffer.
3611 - Bug #1301: Bad assert in _tkinter fixed.
3613 - Added bdist_wininst executable for VS 2008.
3615 - Bug #1604: collections.deque.__init__(iterable) now clears any prior
3616 contents before adding elements from the iterable. This fix brings
3617 the behavior into line with that for list.__init__().
3619 - Added wide char functions to msvcrt module: getwch, getwche, putwch
3620 and ungetwch. The functions accept or return unicode.
3622 - os.access now returns True on Windows for any existing directory.
3624 - Added warnpy3k function to the warnings module.
3626 - Marshal.dumps() now expects exact type matches for int, long, float,
3627 complex, tuple, list, dict, set, and frozenset. Formerly, it would
3628 silently miscode subclasses of those types. Now, it raises a
3631 - Patch #1388440: Add set_completion_display_matches_hook and
3632 get_completion_type to readline.
3634 - Bug #1649098: Avoid declaration of zero-sized array declaration in
3637 - Removed the rgbimg module; been deprecated since Python 2.5.
3639 - Bug #1721309: prevent bsddb module from freeing random memory.
3641 - Bug #1233: fix bsddb.dbshelve.DBShelf append method to work as
3642 intended for RECNO databases.
3644 - pybsddb.sf.net Bug #477182: Load the database flags at database open
3645 time so that opening a database previously created with the DB_DUP
3646 or DB_DUPSORT flag set will keep the proper behavior on subsequent
3647 opens. Specifically: dictionary assignment to a DB object will
3648 replace all values for a given key when the database allows
3649 duplicate values. DB users should use DB.put(k, v) when they want
3650 to store duplicates; not DB[k] = v.
3652 - Add the bsddb.db.DBEnv.lock_id_free method.
3654 - Bug #1686475: Support stat'ing open files on Windows again.
3656 - Patch #1185447: binascii.b2a_qp() now correctly quotes binary
3657 characters with ASCII value less than 32. Also, it correctly quotes
3658 dots only if they occur on a single line, as opposed to the previous
3659 behavior of quoting dots if they are the second character of any
3662 - Bug #1622896: fix a rare corner case where the bz2 module raised an
3663 error in spite of a succesful compression.
3665 - Patch #1654417: make operator.{get,set,del}slice use the full range
3668 - Patch #1646728: datetime.fromtimestamp fails with negative
3669 fractional times. With unittest.
3671 - Patch #1490190: posixmodule now includes os.chflags() and
3672 os.lchflags() functions on platforms where the underlying system
3673 calls are available.
3675 - Patch #1494140: Add documentation for the new struct.Struct object.
3677 - Patch #1432399: Support the HCI protocol for bluetooth sockets
3679 - Patch #1657276: Make NETLINK_DNRTMSG conditional.
3681 - Bug #1653736: Complain about keyword arguments to time.isoformat.
3683 - Bug #1486663: don't reject keyword arguments for subclasses of
3686 - Patch #1610575: The struct module now supports the 't' code, for C99
3689 - Patch #1635058: ensure that htonl and friends never accept or return
3690 negative numbers, per the underlying C implementation.
3692 - Patch #1544279: Improve thread-safety of the socket module by moving
3693 the sock_addr_t storage out of the socket object.
3695 - Patch #1019808: fix bug that causes an incorrect error to be
3696 returned when a socket timeout is set and a connection attempt
3699 - Speed up function calls into the math module.
3701 - Bug #1588217: don't parse "= " as a soft line break in binascii's
3702 a2b_qp() function, instead leave it in the string as quopri.decode()
3705 - Bug #1599782: Fix segfault on bsddb.db.DB().type().
3707 - Bug #1567666: Emulate GetFileAttributesExA for Win95.
3709 - Patch #1576166: Support os.utime for directories on Windows NT+.
3711 - Patch #1572724: fix typo ('=' instead of '==') in _msi.c.
3713 - Bug #1572832: fix a bug in ISO-2022 codecs which may cause segfault
3714 when encoding non-BMP unicode characters.
3716 - Bug #1556784: allow format strings longer than 127 characters in
3717 datetime's strftime function.
3719 - Fix itertools.count(n) to work with negative numbers again.
3721 - RLIMIT_SBSIZE was added to the resource module where available.
3723 - Bug #1551427: fix a wrong NULL pointer check in the win32 version of
3726 - Bug #1548092: fix curses.tparm seg fault on invalid input.
3728 - Patch #1114: fix curses module compilation on 64-bit AIX, & possibly
3729 other 64-bit LP64 platforms where attr_t is not the same size as a
3730 long. (Contributed by Luke Mewburn.)
3732 - Bug #1550714: fix SystemError from itertools.tee on negative value
3735 - Fixed a few bugs on cjkcodecs:
3736 - gbk and gb18030 codec now handle U+30FB KATAKANA MIDDLE DOT
3738 - iso2022_jp_2 codec now encodes into G0 for KS X 1001, GB2312
3739 codepoints to conform the standard.
3740 - iso2022_jp_3 and iso2022_jp_2004 codec can encode JIS X 0213:2
3743 - Bug #1552726: in readline.c, avoid repeatedly polling in interactive
3744 mode by only placing a timeout on the select() if an input hook has
3745 been defined. This prevents an interactive Python from waking up 10
3746 times per second. Patch by Richard Boulton.
3748 - fixed a bug with bsddb.DB.stat: the flags and txn keyword arguments
3751 - Added support for linking the bsddb module against BerkeleyDB 4.5.x,
3754 - Bug #1633621: if curses.resizeterm() or curses.resize_term() is
3755 called, update _curses.LINES, _curses.COLS, curses.LINES and
3758 - Fix an off-by-one bug in locale.strxfrm().
3760 - Fix libffi configure for hppa*-*-linux* | parisc*-*-linux*.
3762 - Build using system ffi library on arm*-linux*.
3764 - Bug #1372: zlibmodule.c: int overflow in PyZlib_decompress
3766 - bsddb module: Fix memory leak when using database cursors on
3767 databases without a DBEnv.
3769 - The sqlite3 module was updated to pysqlite 2.4.1.
3774 - Refactor test_logging to use unittest.
3776 - Refactor test_profile and test_cprofile to use the same code to
3779 - Make test_runpy reentrant by fixing _check_module to clear out any
3780 module being tested. Was causing an error by __import__ doing a
3781 reload on the second run and thus suppressing bytecode recreation.
3783 - Capture socket connection resets and timeouts in test_socket_ssl and
3784 test_urllib2net and raise test.test_support.ResourceDenied.
3786 - Patch #1559413: Fix test_cmd_line if sys.executable contains a
3789 - Added test.test_support.TransientResource which is a context manager
3790 to surround calls to resources that are not guaranteed to work even
3791 if test.test_support.requires says that the resource should exist.
3793 - Added a test for slicing of an exception.
3795 - Added test.test_support.EnvironmentVarGuard. It's a class that
3796 provides a context manager so that one can temporarily set or unset
3797 environment variables.
3799 - Added some tests for modulefinder.
3801 - Converted test_imp to use unittest.
3803 - Fix bsddb test_basics.test06_Transactions to check the version
3806 - test.test_support.catch_warning is a new context manager that can be
3807 used to catch the warnings issued by the warning framework.
3812 - Tools/scripts/reindent.py now creates the backup file using
3813 shutil.copy to preserve user/group and permissions. Added also a
3814 --nobackup option to not create the backup if the user is concerned
3815 regarding this. Check issue 1050828 for more details.
3817 - Tools/scripts/win_add2path.py was added. The simple script modifes
3818 the PATH environment var of the HKCU tree and adds the python bin
3819 and script directory.
3821 - Tools/18n/pygettext.py was added to the list of scripts installed by
3822 Tools/scripts/setup.py (tracker item 642309).
3824 - Added IronPython and Jython support to pybench (part of which was
3827 - Made some minor changes to pybench output to allow the user to see
3828 which Python version is running pybench.
3830 - Added support for the new platform module feature
3831 platform.python_implementation(); this will now be saved in the
3838 - RFE #1765140: Updated documentation on FileHandler and subclasses to
3839 include new optional delay argument.
3841 - Bug #932563: Added section on getting contextual information into
3842 logging output, and added documentation for the new LoggerAdapter
3845 - Bug #1295: Added information about caching of formatted exception
3846 information in the LogRecord by Formatter.format().
3848 - Bug #1637365: add subsection about "__name__ == __main__" to the
3851 - Patch #1698768: updated the "using Python on the Mac" intro.
3853 - Bug #1569057: Document that calling file.next() when the file is
3854 open for writing is undefined.
3856 - Patch #1489771: the syntax rules in Python Reference Manual were
3857 updated to reflect the current Python syntax.
3859 - Patch #1686451: Fix return type for
3860 PySequence_{Count,Index,Fast_GET_SIZE}.
3862 - Patch #1679379: add documentation for fnmatch.translate().
3864 - Bug #1629566: clarify the docs on the return values of parsedate()
3865 and parsedate_tz() in email.utils and rfc822.
3867 - Patch #1671450: add a section about subclassing builtin types to the
3868 "extending and embedding" tutorial.
3870 - Bug #1629125: fix wrong data type (int -> Py_ssize_t) in PyDict_Next
3873 - Bug #1565919: document set types in the Language Reference.
3875 - Bug #1546052: clarify that PyString_FromString(AndSize) copies the
3876 string pointed to by its parameter.
3878 - Bug #1566663: remove obsolete example from datetime docs.
3880 - Bug #1541682: Fix example in the "Refcount details" API docs.
3881 Additionally, remove a faulty example showing PySequence_SetItem
3882 applied to a newly created list object and add notes that this isn't
3889 - Patch #1552024: add decorator support to unparse.py demo script.
3891 - Make auto-generated python.vim file list built-ins and exceptions in
3892 alphatbetical order. Makes output more deterministic and easier to
3893 tell if the file is stale or not.
3895 - Bug #1546372: Fixed small bugglet in pybench that caused a missing
3896 file not to get reported properly.
3902 - Have the search path for building extensions follow the declared
3903 order in $CPPFLAGS and $LDFLAGS when adding directories from those
3904 environment variables.
3906 - Bug #1983: Added a check to pyport to verify that sizeof(pid_t) is
3907 smaller or equal sizeof(long).
3909 - Bug #1234: Fixed semaphore errors on AIX 5.2
3911 - Issue #1726: Remove Python/atof.c from PCBuild/pythoncore.vcproj.
3913 - Removed PCbuild8/ directory and added a new build directory for VS
3914 2005 based on the VS 2008 build directory to PC/VS8.0. The script
3915 PCbuild/vs8to9.py was added to sync changes from PCbuild to
3918 - Moved PCbuild/ directory for VS 2003 to PC/VS7.1 and renamed
3919 PCBuild9/ directory to PCBuild/.
3921 - Bug #1699: Define _BSD_SOURCE only on OpenBSD.
3923 - Bug #1608: use -fwrapv when GCC supports it. This is important,
3924 newer GCC versions may optimize away overflow buffer overflow checks
3925 without this option!
3927 - Patch #1418: Make the AC_REPLACE_FUNCS object files actually work.
3929 - Add a FAST_LOOPS build option that speeds-up looping by trading away
3930 periodic threadstate and signal checking in tight loops. By
3931 default, this option is turned-off. It should only be enabled in
3932 debugged, performance critical applications.
3934 - Patch #786737: Allow building in a tree of symlinks pointing to a
3937 - Bug #1737210: Change Manufacturer of Windows installer to PSF.
3939 - Bug #1746880: Correctly install DLLs into system32 folder on Win64.
3941 - Define _BSD_SOURCE, to get access to POSIX extensions on OpenBSD
3944 - Stop supporting AtheOS and cause a build error in configure for the
3947 - Bug #1655392: don't add -L/usr/lib/pythonX.Y/config to the LDFLAGS
3948 returned by python-config if Python was built with --enable-shared
3949 because that prevented the shared library from being used.
3951 - Patch #1569798: fix a bug in distutils when building Python from a
3952 directory within sys.exec_prefix.
3954 - Bug #1675511: Use -Kpic instead of -xcode=pic32 on Solaris/x86.
3956 - Disable _XOPEN_SOURCE on NetBSD 1.x.
3958 - configure now checks whether gcc supports the PyArg_ParseTuple
3961 - Bug #1578513: Cross compilation was broken by a change to configure.
3962 Repair so that it's back to how it was in 2.4.3.
3964 - Patch #1576954: Update VC6 build directory; remove redundant files
3967 - Bug #1568842: Fix test for uintptr_t.
3969 - Patch #1540470: for OpenBSD 4.0.
3971 - Fix build failure on kfreebsd and on the hurd.
3973 - Fix the build of the library reference in info format.
3975 - Allow Emacs 22 for building the documentation in info format.
3977 - Makefile.pre.in(buildbottest): Run an optional script
3978 pybuildbot.identify to include some information about the build
3985 - Unified naming convention for free lists and their limits. All free
3986 lists in Object/ are named ``free_list``, the counter ``numfree``
3987 and the upper limit is a macro ``PyName_MAXFREELIST`` inside an
3990 - ``PySet_Add()`` can now modify a newly created frozenset. Similarly
3991 to ``PyTuple_SetItem``, it can be used to populate a brand new
3992 frozenset; but it does not steal a reference to the added item.
3994 - Added ``PySet_Check()`` and ``PyFrozenSet_Check()`` to the set API.
3996 - Backport of PyUnicode_FromString(), _FromStringAndSize(), _Format
3997 and _FormatV from Python 3.0. Made PyLong_AsSsize_t and
3998 PyLong_FromSsize_t public functions.
4000 - Patch #1720595: add T_BOOL to the range of structmember types.
4002 - Issue #1534: Added ``PyFloat_GetMax()``, ``PyFloat_GetMin()`` and
4003 ``PyFloat_GetInfo()`` to the float API.
4005 - Issue #1521: On 64bit platforms, using PyArgs_ParseTuple with the t#
4006 of w# format code incorrectly truncated the length to an int, even
4007 when PY_SSIZE_T_CLEAN is set. The str.decode method used to return
4008 incorrect results with huge strings.
4010 - Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
4011 Py_TYPE and Py_REFCNT.
4013 - PEP 3123: Provide forward compatibility with Python 3.0, while
4014 keeping backwards compatibility. Add Py_Refcnt, Py_Type, Py_Size,
4015 and PyVarObject_HEAD_INIT.
4017 - Py_ssize_t fields work in structmember when HAVE_LONG_LONG is not
4020 - Patch #1733960: Allow T_LONGLONG to accept ints.
4022 - T_PYSSIZET can now be used in PyMemberDef lists for Py_ssize_t members.
4024 - Added a new API function ``PyImport_ImportModuleNoBlock``.
4026 - Bug #1637022: Prefix AST symbols with _Py_.
4028 - Fix some leftovers from the conversion from int to Py_ssize_t
4029 (relevant to strings and sequences of more than 2**31 items).
4031 - Make _PyGILState_NoteThreadState() static, it was not used anywhere
4032 outside of pystate.c and should not be necessary.
4034 - ``PyImport_Import`` and ``PyImport_ImportModule`` now always do
4035 absolute imports. In earlier versions they might have used relative
4036 imports under some conditions.
4038 - Added case insensitive comparison methods ``PyOS_stricmp(char*,
4039 char*)`` and ``PyOS_strnicmp(char*, char*, Py_ssize_t)``.
4041 - Bug #1542693: remove semi-colon at end of PyImport_ImportModuleEx
4042 macro so it can be used as an expression.
4048 - Patch #1706: Drop support for Win9x, WinME and NT4. Python now
4049 requires Windows 2000 or greater. The _WINVER and NTDDI_VERSION
4050 macros are set to Win2k for x86/32bit builds and WinXP for AMD64
4053 - Conditionalize definition of _CRT_SECURE_NO_DEPRECATE and
4054 _CRT_NONSTDC_NO_DEPRECATE.
4056 - Bug #1216: Restore support for Visual Studio 2002.
4062 - cfmfile now raises a DeprecationWarning.
4064 - buildtools now raises a DeprecationWarning.
4066 - Removed the macfs module. It had been deprecated since Python 2.5.
4067 This lead to the deprecation of macostools.touched() as it relied
4068 solely on macfs and was a no-op under OS X.
4072 **(For information about older versions, consult the HISTORY file.)**