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 #4075: Use OutputDebugStringW in Py_FatalError.
17 - Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
18 file with `str' filename on Windows.
20 - Issue #3680: Reference cycles created through a dict, set or deque iterator
21 did not get collected.
23 - Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
24 where the tp_hash and tp_dict slots are both NULL.
26 - Issue #4764: With io.open, IOError.filename is set when trying to open a
27 directory on POSIX systems.
29 - Issue #4764: IOError.filename is set when trying to open a directory on POSIX
32 - Issue #4759: None is now allowed as the first argument of
33 bytearray.translate(). It was always allowed for bytes.translate().
35 - Added test case to ensure attempts to read from a file opened for writing
38 - Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
39 print elapsed times, not only when some objects are uncollectable /
40 unreachable. Original patch by Neil Schemenauer.
42 - Issue #3439: Add a bit_length method to int and long.
44 - Issue #2183: Simplify and optimize bytecode for list comprehensions.
45 Original patch by Neal Norwitz.
47 - Issue #4597: Fixed exception handling when the __exit__ function of a
48 context manager returns a value that cannot be converted to a bool.
50 - Issue #4597: Fixed several opcodes that weren't always propagating
53 - Issue #4445: Replace "sizeof(PyStringObject)" with
54 "offsetof(PyStringObject, ob_sval) + 1" when allocating memory for
55 str instances. On a typical machine this saves 3 bytes of memory
56 (on average) per string allocation.
58 - Issue #3996: On Windows, the PyOS_CheckStack function would cause the
59 interpreter to abort ("Fatal Python error: Could not reset the stack!")
60 instead of throwing a MemoryError.
62 - Issue #3689: The list reversed iterator now supports __length_hint__
63 instead of __len__. Behavior now matches other reversed iterators.
65 - Issue #4367: Python would segfault during compiling when the unicodedata
66 module couldn't be imported and \N escapes were present.
68 - Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
69 method on file objects with closefd=False. The file descriptor is still
70 kept open but the file object behaves like a closed file. The ``FileIO``
71 object also got a new readonly attribute ``closefd``.
73 - Issue #4348: Some bytearray methods returned that didn't cause any change to
74 the bytearray, returned the same bytearray instead of a copy.
76 - Issue #4317: Fixed a crash in the imageop.rgb2rgb8() function.
78 - Issue #4230: If ``__getattr__`` is a descriptor, it now functions correctly.
80 - Issue #4048: The parser module now correctly validates relative imports.
82 - Issue #4225: ``from __future__ import unicode_literals`` didn't work in an
85 - Issue #4176: Fixed a crash when pickling an object which ``__reduce__``
86 method does not return iterators for the 4th and 5th items.
88 - Issue #4209: Enabling unicode_literals and the print_function in the same
89 __future__ import didn't work.
91 - Using ``nonlocal`` as a variable name will now raise a Py3k SyntaxWarning
92 because it is a reserved word in 3.x.
94 - On windows, os.chdir given unicode was not working if GetCurrentDirectoryW
95 returned a path longer than MAX_PATH. (But It's doubtful this code path is
96 really executed because I cannot move to such directory on win2k)
98 - Issue #4069: When set.remove(element) is used with a set element, the element
99 is temporarily replaced with an equivalent frozenset. But the eventual
100 KeyError would always report the empty frozenset([]) as the missing key. Now
101 it correctly refers to the initial element.
103 - Issue #4509: Various issues surrounding resize of bytearray objects to
104 which there are buffer exports.
106 - Issue #4748: Lambda generators no longer return a value.
111 - Restore Python 2.3 compatibility for decimal.py.
113 - Issue #1702551: distutils sdist was not excluding VCS directories under
114 Windows. Inital solution by Guy Dalberto.
116 - The _tkinter module functions "createfilehandler", "deletefilehandler",
117 "createtimerhandler", "mainloop", "dooneevent" and "quit" have been
118 deprecated for removal in 3.x
120 - Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
121 to the decimal module.
123 - Issue #4812: add missing underscore prefix to some internal-use-only
124 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
126 - Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
127 the function is not a generator.
129 - Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
130 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
132 - Issue #4646: distutils was choking on empty options arg in the setup
133 function. Original patch by Thomas Heller.
135 - Fractions.from_float() no longer loses precision for integers too big to
138 - Issue 4790: The nsmallest() and nlargest() functions in the heapq module
139 did unnecessary work in the common case where no key function was specified.
141 - Issue #3767: Convert Tk object to string in tkColorChooser.
143 - Issue #3248: Allow placing ScrolledText in a PanedWindow.
145 - Issue #4444: Allow assertRaises() to be used as a context handler, so that
146 the code under test can be written inline if more practical.
148 - Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
149 works as expected in the interactive environment.
151 - Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
154 - Issue #4400: .pypirc default generated file was broken in distutils.
156 - Issue #4736: io.BufferedRWPair's closed property now functions properly.
158 - Issue #3954: Fix a potential SystemError in _hotshot.logreader error
161 - Issue #4574: fix a crash in io.IncrementalNewlineDecoder when a carriage
162 return encodes to more than one byte in the source encoding (e.g. UTF-16)
163 and gets split on a chunk boundary.
165 - Issue #4223: inspect.getsource() will now correctly display source code
166 for packages loaded via zipimport (or any other conformant PEP 302
167 loader). Original patch by Alexander Belopolsky.
169 - Issue #4201: pdb can now access and display source code loaded via
170 zipimport (or any other conformant PEP 302 loader). Original patch by
171 Alexander Belopolsky.
173 - Issue #4197: doctests in modules loaded via zipimport (or any other PEP
174 302 conformant loader) will now work correctly in most cases (they
175 are still subject to the constraints that exist for all code running
176 from inside a module loaded via a PEP 302 loader and attempting to
177 perform IO operations based on __file__). Original patch by
178 Alexander Belopolsky.
180 - Issues #4082 and #4512: Add runpy support to zipimport in a manner that
181 allows backporting to maintenance branches. Original patch by
182 Alexander Belopolsky.
184 - Issue #4163: Use unicode-friendly word splitting in the textwrap functions
185 when given an unicode string.
187 - Issue #4616: TarFile.utime(): Restore directory times on Windows.
189 - Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
190 give correct results in the case where one argument is a quiet NaN
191 and the other is a finite number that requires rounding.
193 - Issue #1030250: Distutils created directories even when run with the
196 - Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
199 - Issue #4529: fix the parser module's validation of try-except-finally
202 - Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
203 not a malformed option.
205 - Added the subprocess.check_output() convenience function to get output
206 from a subprocess on success or raise an exception on error.
208 - Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
209 support unusual filenames (such as those containing semi-colons) in
210 Content-Disposition headers.
212 - Issue #4384: Added logging integration with warnings module using
213 captureWarnings(). This change includes a NullHandler which does nothing;
214 it will be of use to library developers who want to avoid the "No handlers
215 could be found for logger XXX" message which can appear if the library user
216 doesn't configure logging.
218 - Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
221 - Issue #4363: The uuid.uuid1() and uuid.uuid4() functions now work even if
222 the ctypes module is not present.
224 - FileIO's mode attribute now always includes ``"b"``.
226 - Issue #4116: Resolve member name conflict in ScrolledCanvas.__init__.
228 - httplib.HTTPConnection.putheader() now accepts an arbitrary number of values
229 for any header, matching what the documentation has claimed for a while.
231 - Issue #3774: Fixed an error when create a Tkinter menu item without command
234 - Fixed a modulefinder crash on certain relative imports.
236 - Issue #4150: Pdb's "up" command now works for generator frames in post-mortem
239 - Issue #4092: Return ArgInfo as promised in the documentation from
240 inspect.getargvalues.
242 - Issue #3935: Properly support list subclasses in bisect's C implementation.
244 - Issue #4014: Don't claim that Python has an Alpha release status, in addition
245 to claiming it is Mature.
247 - Issue #4730: Fixed the cPickle module to handle correctly astral characters
248 when protocol 0 is used.
250 - Issue #1594: MacOS.GetCreatorAndType now always returns a big-endian result,
251 to be consistent with Apple tools.
253 - Issue #900949: plat-mac/videoreader.py no longer relies on a non-existing
256 - Issue #16278952: plat-mac/videoreader.py now correctly imports MediaDescr
258 - Issue #1737832 : plat-mac/EasyDialog.py no longer uses the broken aepack
261 - Issue #1149804: macostools.mkdirs now even works when another process
262 creates one of the needed subdirectories.
264 - Issue #900506: added --no-zipimport flag to the bundlebuilder script
266 - Issue #841800: bundlebuilder now works with 'python -O'
271 - Issue #4677: add two list comprehension tests to pybench.
276 - Issue #4472: "configure --enable-shared" now works on OSX
278 - Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
280 - Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
282 - Issue #4289: Remove Cancel button from AdvancedDlg.
284 - Issue #1656675: Register a drop handler for .py* files on Windows.
286 - Issue #4120: Exclude manifest from extension modules in VS2008.
288 - Issue #4091: Install pythonxy.dll in system32 again.
290 - Issue #4018: Disable "for me" installations on Vista.
292 - Issue #3758: Add ``patchcheck`` build target to .PHONY.
294 - Issue #4204: Fixed module build errors on FreeBSD 4.
299 - Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
301 - Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
302 the GIL is released, or owned by another thread.
304 - Issue #4122: On Windows, fix a compilation error when using the
305 Py_UNICODE_ISSPACE macro in an extension module.
310 - Issue #4051: Prevent conflict of UNICODE macros in cPickle.
312 - Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
314 - Issue #1040026: Fix os.times result on systems where HZ is incorrect.
316 - Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
319 - Issue #4365: Add crtassem.h constants to the msvcrt module.
321 - Issue #4396: The parser module now correctly validates the with statement.
324 What's New in Python 2.6 final
325 ==============================
327 *Release date: 01-Oct-2008*
332 - Issue #3967: Fixed a crash in the count() and find() methods of string-like
333 objects, when the "start" parameter is a huge value.
335 - Issue #3965: Fixed a crash on Windows when open() is given an invalid
336 filename or mode, and the filename is a unicode string.
338 - Bug #3951: Py_USING_MEMORY_DEBUGGER should not be enabled by default.
343 - Issue #3965: Allow repeated calls to turtle.Screen, by making it a
344 true singleton object.
346 - Issue #3895: It was possible to crash the interpreter when an external timer
347 was used with cProfile that returned an object that could not be converted
350 - Issue #3950: Made turtle respect scale factors.
352 - Issue #3547: Fixed ctypes structures bitfields of varying integer
355 - Issue #3879: A regression in urllib.getproxies_enviroment was fixed.
357 - Issue #3863: Disabled a unit test of fork being called from a thread
358 when running on platforms known to exhibit OS bugs when attempting that.
363 - Bug #3989: Package the 2to3 script (as 2to3.py) in the Windows
366 - Bug #3887: Package x64 version of CRT for AMD64 Windows binaries.
369 What's New in Python 2.6 release candidate 2?
370 =============================================
372 *Release date: 17-Sep-2008*
380 - Security Issue #2: imageop did not validate arguments correctly and could
381 segfault as a result.
383 - Issue #3886: Possible integer overflows in the _hashopenssl module were
389 - Issue #3850: recursion tests in Misc/find_recursion_limit.py can raise
390 AttributeError instead of RuntimeError, depending in which C API call
391 exactly the recursion limit is exceeded. Consequently, both exception types
392 are caught and silenced.
397 - Issue #3617: Include a licensing statement regarding the Microsoft
398 C runtime in the Windows installer.
401 What's New in Python 2.6 release candidate 1?
402 =============================================
404 *Release date: 12-Sep-2008*
409 - Issue #3642: Suppress warning in obmalloc when size_t is larger than uint.
411 - Issue #3743: In a few places, PY_FORMAT_SIZE_T was incorrectly used with
412 PyString_FromFormat or PyErr_Format to display size_t values. The macro
413 PY_FORMAT_SIZE_T is designed to select the correct format for the OS
414 ``printf`` function, whereas PyString_FromFormat has an independent
415 implementation and uses "%zd" on all platforms for size_t values.
416 This makes a difference on win64, where ``printf`` needs "%Id" to display
419 - Issue #3634: _weakref.ref(Exception).__init__() gave invalid return value on
422 - Issue #3777: long() applied to a float object now always return a long
423 object; previously an int would be returned for small values. the __long__
424 method is allowed to return either an int or a long, but the behaviour of
425 float objects should not change to respect backward compatibility.
427 - Issue #3751: str.rpartition would perform a left-partition when called with
430 - Issue #3683: Fix compilation when --without-threads is given.
432 - Issue #3668: Fix a memory leak with the "s*" argument parser in
433 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
434 was correctly parsed but parsing of subsequent arguments failed.
436 - Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
437 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
438 mechanism. In the process, fix a bug where isinstance() and issubclass(),
439 when given a tuple of classes as second argument, were looking up
440 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
443 - Fix crashes on memory allocation failure found with failmalloc.
445 - Fix memory leaks found with valgrind and update suppressions file.
447 - Fix compiler warnings in opt mode which would lead to invalid memory reads.
449 - Fix problem using wrong name in decimal module reported by pychecker.
451 - Silenced another compiler warning about a used but not defined
452 function 'stringlib_contains_obj'.
454 - Added warnings on the use of ``__getslice__``, ``__setslice__``, or
457 - Issue #3678: Correctly pass LDFLAGS and LDLAST to the linker on shared
458 library targets in the Makefile.
460 - Issue #1204: The configure script now tests for additional libraries
461 that may be required when linking against readline. This fixes issues
462 with x86_64 builds on some platforms (a few Linux flavors and OpenBSD).
467 - Aliased PyObject_Bytes to PyObject_Str.
472 - Issue #3640: Pickling a list or a dict uses less local variables, to reduce
473 stack usage in the case of deeply nested objects.
475 - Issue #3629: Fix sre "bytecode" validator for an end case.
477 - Issue #3811: The Unicode database was updated to 5.1.
479 - Issue #3781: Further warnings.catch_warnings() cleanup to prevent
480 silent misbehaviour when a single instance is nested in multiple
481 with statements, or when the methods are invoked in the wrong order.
483 - Issue #3809: Fixed spurious 'test.blah' file left behind by test_logging.
485 - Issue #3781: Clean up the API for warnings.catch_warnings() by having it
486 return a list or None rather than a custom object.
488 - Issue #1638033: Cookie.Morsel gained the httponly attribute.
490 - Issue #3535: zipfile couldn't read some zip files larger than 2GB.
492 - Issue #3776: Deprecate the bsddb package for removal in 3.0.
494 - Issue #3762: platform.architecture() fails if python is lanched via
497 - Issue #3772: Fixed regression problem in StreamHandler.emit().
499 - Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
500 to the urlparse one. Added a PendingDeprecationWarning in the old
501 module, it will be deprecated in the future.
503 - Issue #2562: Fix distutils PKG-INFO writing logic to allow having
504 non-ascii characters and Unicode in setup.py meta-data.
506 - Issue #3726: Allow spaces in separators in logging configuration files.
508 - Issue #3719: platform.architecture() fails if there are spaces in the
509 path to the Python binary.
511 - Issue 3602: Moved test.test_support.catch_warning() to
512 warnings.catch_warnings() along with some API cleanup. Expanding the tests
513 for catch_warnings() also led to an improvement in the raising of a
514 DeprecationWarning related to warnings.warn_explicit().
516 - The deprecation warnings for the old camelCase threading API were removed.
518 - logging: fixed lack of use of encoding attribute specified on a stream.
520 - Silenced a trivial compiler warning in the sqlite module.
522 - Fixed two format strings in the _collections module.
524 - Issue #3703: _fileio.FileIO gave unhelpful error message when trying to open a
527 - Issue #3708: os.urandom no longer goes into an infinite loop when passed a
528 non-integer floating point number.
530 - Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
536 - Issue #2975: When compiling several extension modules with Visual Studio 2008
537 from the same python interpreter, some environment variables would grow
540 - Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
541 exploitation of poor argument checking.
543 - sqlite3: Changed docstring of iterdump() to mark method as "Non-standard".
545 - Issue #3103: Reduced globals symbols used by sqlite3 module and made sure all
546 remaining ones have "pysqlite_" prefix.
548 - Issue #3846: Release the GIL during sqlite3_prepare calls. This improves
549 concurrent access to the same SQLite database from multiple
555 - Issue #3781: Add test.test_support.check_warnings() as a convenience
556 wrapper for warnings.catch_warnings() that makes it easier to check
557 that expected warning messages are being reported.
559 - Issue #3796: Some tests functions were not enabled in test_float.
561 - Issue #3768: Move test_py3kwarn over to the new API for catch_warnings().
566 - Issue #3833: Use a different upgrade code for Win64 installers.
568 - Issue #2271: Set SecureCustomProperties so that installation will properly
569 use the TARGETDIR even for unprivileged users.
571 - Allow passing the MSI file name to merge.py.
573 - Issue #3758: Rename the 'check' target to 'patchcheck' so as to not clash
574 with GNU build target guidelines.
577 What's New in Python 2.6 beta 3?
578 ================================
580 *Release date: 20-Aug-2008*
585 - Issue #1878: Remove Py_TPFLAGS_HAVE_VERSION_TAG from
586 Py_TPFLAGS_DEFAULT when not building the core. This means 3rd party
587 extensions do not automatically benefit from the class attribute
588 cache; they will have to explicitly add Py_TPFLAGS_HAVE_VERSION_TAG
589 to their tp_flags field if they care. This is a backwards
590 compatibility feature; in 3.0, all types will use the cache by
593 - Keyword arguments can now follow starred arguments. (``f(a, *args,
594 keyword=23)`` is now valid syntax.)
596 - ctypes function pointers that are COM methods have a boolean True
599 - Issue #3139: Make buffer-interface thread-safe wrt. PyArg_ParseTuple,
600 by denying s# to parse objects that have a releasebuffer procedure,
603 - Issue #3537: Fix an assertion failure when an empty but presized dict
604 object was stored in the freelist.
606 - Issue #1481296: Make long(float('nan')) and int(float('nan')) raise
607 ValueError consistently across platforms.
609 - Issue #3479: On platforms where sizeof(int) is smaller than sizeof(long)
610 (64bit Unix, for example), unichr() would truncate its argument and return
611 u'\x00' for unichr(2**32). Now it properly raises an OverflowError.
613 - Apply security patches from Apple.
615 - Issue #2542: Now that issubclass() may call arbitrary code, ensure that
616 PyErr_ExceptionMatches returns 0 when an exception occurs there.
618 - Issue #1819: function calls with several named parameters are now on
619 average 35% faster (as measured by pybench).
621 - Issue #2378: An unexpected UnboundLocalError or NameError could appear when
622 the python debugger steps into a class statement: the free variables (local
623 variables defined in an outer scope) would be deleted from the outer scope.
625 - Issue #2620: Overflow checking when allocating or reallocating memory
626 was not always being done properly in some python types and extension
627 modules. PyMem_MALLOC, PyMem_REALLOC, PyMem_NEW and PyMem_RESIZE have
628 all been updated to perform better checks and places in the code that
629 would previously leak memory on the error path when such an allocation
630 failed have been fixed.
635 - Issue #3612: Added some missing basic types in ctypes.wintypes.
637 - The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
638 symtable.Symbol have been deprecated for removal in 3.0 and the next release.
640 - Issue #2234: distutils failed for some versions of the cygwin compiler. The
641 version reported by these tools does not necessarily follow the python
642 version numbering scheme, so the module is less strict when parsing it.
644 - Issue #2235: Added Py3k warnings for types which will become unhashable
645 under the stricter __hash__ inheritance rules in 3.0. Several types
646 which did not meet the rules for hash invariants and were already
647 unhashable in 3.0 have now been explicitly flagged as unhashable in
648 2.6 as well (collections.Mapping, collections.Set, unittest.TestSuite,
649 xml.dom.minidom.NamedNodeMap, numbers.Number, UserList.UserList)
651 - Update __all__ for cookielib, csv, os, urllib2, and weakref to include things
652 imported into the module but exposed as part of the module's API.
654 - Remove an unneeded import of abc.ABCMeta from 'inspect'.
656 - Remove unneeded imports of 'sys' and 'warnings' from 'io'.
658 - Remove unneeded imports of 'warnings' from shelve, filecmp, and dummy_thread.
660 - Issue #3575: Incremental decoder's decode function now takes bytearray
661 by using 's*' instead of 't#'.
663 - Issue #2222: Fixed reference leak when occured os.rename()
664 fails unicode conversion on 2nd parameter. (windows only)
666 - Issue 2464. urllib2 now supports a malformation in the URL received
669 - Silence the DeprecationWarning raised when importing mimetools in
670 BaseHTTPServer, cgi (and rfc822), httplib.
672 - Issue #2776: fixed small issue when handling an URL with double slash
673 after a 302 response in the case of not going through a proxy.
675 - Issue #2676: in the email package, content-type parsing was hanging on
676 pathological input because of quadratic or exponential behaviour of a
679 - Issue #3476: binary buffered reading through the new "io" library is now
682 - Silence the DeprecationWarning of rfc822 when it is imported by mimetools
683 since mimetools itself is deprecated. Because modules are cached, all
684 subsequent imports of rfc822 will not raise a visible DeprecationWarning.
686 - Issue #3134: shutil referenced undefined WindowsError symbol.
688 - Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
689 menu entries were not deleted.
691 - Copied the implementation of reduce() to _functools.reduce() to have a
692 version that did not raise a DeprecationWarning under -3.
694 - Issue #3205: When iterating over a BZ2File fails allocating memory, raise
695 a MemoryError rather than silently stop the iteration.
697 - Issue #3487: sre "bytecode" validator. Passing invalid "re-bytecode"
698 to _sre.compile() will now be rejected. This should not affect anybody
699 since the re.compile() function never generates invalid re-bytecode.
701 - Issue #3436: Make csv.DictReader's fieldnames attribute a property so that
702 upon first access it can be automatically initialized from the csv file if
703 it wasn't initialized during instantiation.
705 - Issue #2338: Create imp.reload() to help with transitioning to Python 3.0 as
706 the reload() built-in has been removed.
708 - Changed code in the following modules/packages to remove warnings raised
709 while running under the ``-3`` flag: aifc, asynchat, asyncore, bdb, bsddb,
710 ConfigParser, cookielib, csv, difflib, distutils, DocXMLRPCServer, email,
711 filecmp, fileinput, inspect, logging, modulefinder, pdb, pickle, profile,
712 pstats, pydoc, re, rlcompleter, SimpleXMLRPCServer, shelve, socket,
713 subprocess, sqlite3, tarfile, Tkinter, test.test_support, textwrap,
714 threading, tokenize, traceback, urlparse, wsgiref, xml, xmlrpclib.
716 - Issue #3039: Fix tarfile.TarFileCompat.writestr() which always
717 raised an AttributeError.
719 - Issue #2523: Fix quadratic behaviour when read()ing a binary file without
720 asking for a specific length. This problem only affected files opened
721 using the new "io" module, not the built-in open() function.
723 - Issue #3449: Update decimal module to use most recent specification
724 (v. 1.68) and tests (v. 2.58) from IBM.
726 - Issue 3437: Bug fix in robotparser parsing of Allow: lines.
728 - Issue 1592: Improve error reporting when operations are attempted
731 - Deprecate the "ast" parser function aliases.
733 - Issue #3120: On 64-bit Windows the subprocess module was truncating handles.
735 - Issue #3303: Fix a crash in locale.strcoll() when calling it with
738 - Issue #3302: Fix several crashes when calling locale's gettext functions
741 - Issue #3389: Allow resolving dotted names for handlers in logging
744 - Deprecate the sunaudio module for removal in Python 3.0.
746 - Issue #3394: zipfile.writestr sets external attributes when passed a
747 file name rather than a ZipInfo instance, so files are extracted with
748 mode 0600 rather than 000 under Unix.
750 - Issue #1857: subprocess.Popen.poll gained an additional _deadstate keyword
751 argument in python 2.5, this broke code that subclassed Popen to include its
752 own poll method. Fixed my moving _deadstate to an _internal_poll method.
757 - Generate the PatternGrammar pickle during "make install".
762 - Issue #2235: the C API function PyObject_HashNotImplemented and its
763 interaction with the tp_hash slot (added in 2.6b2) are now documented
765 - Issue #643841: The language reference now provides more detailed
766 coverage of the lookup process for special methods. The disclaimers
767 regarding lack of coverage of new-style classes have also been
768 removed, since the coverage is now fairly reasonable.
771 What's New in Python 2.6 beta 2?
772 ================================
774 *Release date: 17-Jul-2008*
779 - Issue #3156: Fix inconsistent behavior of the bytearray type: all
780 its methods now allow for items objects that can be converted to
781 an integer using operator.index().
783 - Issue #3360: Fix incorrect parsing of '020000000000.0', which
784 produced a ValueError instead of giving the correct float.
786 - Issue #3083: Add alternate (#) formatting for bin, oct, hex output
787 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
789 - Issue #3008: the float type has a new instance method 'float.hex'
790 and a new class method 'float.fromhex' to convert floating-point
791 numbers to and from hexadecimal strings, respectively.
793 - Issue #2235: __hash__ is once again inherited by default. To allow
794 collections.Hashable to remain meaningful in the presence of the
795 default hash implementation (object.__hash__), it is now possible
796 to explicit block inheritance of hash by setting __hash__=None at
797 the Python level, or tp_hash=PyObject_HashNotImplemented at the C
800 - Issue #3221: Issue a RuntimeWarning instead of raising SystemError if
801 the parent module cannot be found while performing an absolute import.
802 This means that an incorrectly defined __package__ attribute will
803 now only prevent relative imports in that module rather than causing
804 all imports from that module to fail.
806 - Issue #2517: Allow unicode messages in Exceptions again by correctly
807 bypassing the instance dictionary when looking up __unicode__ on
810 - Issue #3242: Fix a crash inside the print statement, if sys.stdout is
811 set to a custom object whose write() method happens to install
812 another file in sys.stdout.
814 - Issue #3088: Corrected a race condition in classes derived from
815 threading.local: the first member set by a thread could be saved in
816 another thread's dictionary.
818 - Issue #3004: Minor change to slice.indices(): the start and stop
819 arguments are now treated identically, making the behaviour easier
820 to describe and understand. For example, slice(None, -10,
821 1).indices(9) now returns (0, 0, 1) instead of (0, -1, 1), and
822 slice(None, 10, -1).indices(10) returns (9, 9, -1) instead of (9,
825 - Issue #3219: Calling a function with repeated keyword arguments,
826 f(a=2, a=23), would not cause a syntax error. This was a regression
827 from 2.4 caused by the switch to the new compiler.
829 - Issue #2862: Make int and float freelist management consistent with
830 other freelists. Changes their CompactFreeList apis into
831 ClearFreeList apis and calls them via gc.collect().
836 - Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
837 api functions without holding the GIL, which could lead to a fatal
838 error when they failed.
840 - Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
842 - Issue #3395: fix reference in test_multiprocessing to old debugInfo method
844 - Issue #3312: Fix two crashes in sqlite3.
846 - Issue #1608818: Fix misbehavior in os.listdir() if readdir() fails.
848 - Issue #3125: Remove copy_reg in multiprocessing and replace it with
849 ForkingPickler.register() to resolve conflict with ctypes.
851 - Issue #3090: Fixed ARCHFLAGS parsing on OS/X
853 - Issue #3313: Fixed a crash when a failed dlopen() call does not set
854 a valid dlerror() message.
856 - Issue #3258: Fixed a crash when a ctypes POINTER type to an
857 incomplete structure was created.
859 - Issue #3339: dummy_thread.acquire() should not return None.
861 - Issue #3285: Fractions from_float() and from_decimal() accept Integral arguments.
863 - Issue #3301: Bisect module behaved badly when lo was negative.
865 - Issue #839496: SimpleHTTPServer used to open text files in text mode. This is
866 both unnecessary (HTTP allows text content to be sent in several forms) and
867 wrong because the actual transmitted size could differ from the
868 content-length. The problem had been corrected in the 2.4 branch, but never
871 - Issue #2663: add filtering capability to shutil.copytree().
873 - Issue #1622: Correct interpretation of various ZIP header fields.
875 - Issue #1526: Allow more than 64k files to be added to Zip64 file.
877 - Issue #1746: Correct handling of zipfile archive comments (previously
878 archives with comments over 4k were flagged as invalid). Allow writing
879 Zip files with archives by setting the 'comment' attribute of a ZipFile.
881 - Issue #449227: The rlcompleter module now adds "(" to callable objects
884 - Issue #3190: Pydoc now hides the automatic module attribute __package__ (the
885 handling is now the same as that of other special attributes like __name__).
887 - Issue #2885 (partial): The urllib.urlopen() function has been deprecated for
888 removal in Python 3.0 in favor of urllib2.urlopen().
890 - Issue #2113: Fix error in subprocess.Popen if the select system call is
891 interrupted by a signal.
893 - Issue #3309: Fix bz2.BZFile iterator to release its internal lock
894 properly when raising an exception due to the bz2file being closed.
897 - Issue #3094: httplib.HTTPSConnection Host: headers no longer include the
898 redundant ":443" port number designation when the connection is using the
899 default https port (443).
901 - Issue #874900: after an os.fork() call the threading module state is cleaned
902 up in the child process to prevent deadlock and report proper thread counts
903 if the new process uses the threading module.
908 - test.test_support.catch_warning now keeps track of all warnings it sees
909 and is now better documented. Explicit unit tests for this context manager
910 have been added to test_warnings.
915 - Issue #3215: Build sqlite3 as sqlite3.dll, not sqlite3.pyd.
921 - Document that robotparser has been renamed to urllib.robotparser in
924 - Document that urlparse has been renamed to urllib.parse in Python 3.0.
926 - Document that urllib2 is split across multiple modules and renamed in
929 - Document that urllib is split across multiple modules and renamed in
933 What's New in Python 2.6 beta 1?
934 ================================
936 *Release date: 18-June-2008*
941 - Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
942 argument being anything other than a dict or None. Also fixed a bug in error
943 handling when 'message' and 'category' were both set to None, triggering a
946 - Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
947 holds the last (strong) reference to its referent.
949 - Add future_builtins.ascii().
951 - Several set methods now accept multiple arguments: update(), union(),
952 intersection(), intersection_update(), difference(), and difference_update().
954 - Issue #2898: Added sys.getsizeof() to retrieve size of objects in bytes.
956 - New environment variable PYTHONIOENCODING.
958 - Patch #2488: Add sys.maxsize.
960 - Issue #2353: file.xreadlines() now emits a Py3k warning.
962 - Issue #2863: generators now have a ``gen.__name__`` attribute that
963 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
964 ``func.func_code.co_name``. The repr() of a generator now also
967 - Issue #2831: enumerate() now has a ``start`` argument.
969 - Issue #2801: fix bug in the float.is_integer method where a
970 ValueError was sometimes incorrectly raised.
972 - Issue #2790: sys.flags was not properly exposing its bytes_warning
975 - Issue #2196: hasattr() now lets exceptions which do not inherit
976 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
979 - Added checks for integer overflows, contributed by Google. Some are
980 only available if asserts are left in the code, in cases where they
981 can't be triggered from Python code.
986 - Issue #1179: [CVE-2007-4965] Integer overflow in imageop module.
988 - Issue #3116: marshal.dumps() had quadratic behavior for strings > 32Mb.
990 - Issue #2138: Add factorial() to the math module.
992 - The heapq module does comparisons using LT instead of LE. This
993 makes its implementation match that used by list.sort().
995 - Issue #2819: add full-precision summation function to math module,
996 based on Hettinger's ASPN Python Cookbook recipe.
998 - Issue #2592: delegate nb_index and the floor/truediv slots in
1001 - Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
1004 - Support for Windows 9x has been removed from the winsound module.
1006 - bsddb module updated to version 4.7.3.
1007 http://www.jcea.es/programacion/pybsddb.htm#bsddb3-4.7.3. This
1008 code should be compatible with Python 3.0.
1010 - Issue #2858: Fix potential memory corruption when
1011 bsddb.db.DBEnv.lock_get and other bsddb.db object constructors
1012 raised an exception.
1014 - Issue #2669: bsddb/__init__.py iteration no longer silently fails when
1015 the database has changed size during iteration. It now raises a
1016 RuntimeError in the same manner as a dictionary.
1018 - Issue #2870: cmathmodule.c compile error.
1020 - Added a threading.Thread.ident property.
1025 - logging.config: Removed out-of-date comment in _install_handlers and
1026 used issubclass in place of equality comparison of classes.
1028 - Issue #2722: Now the os.getcwd() supports very long path names.
1030 - Issue #2888: Fixed the behaviour of pprint when working with nested
1031 structures, to match the behaviour of 2.5 and 3.0 (now follows the common
1034 - Issue #1817: cgi now correctly handles the querystring on POST requests
1036 - Issue #3136: fileConfig()'s disabling of old loggers is now conditional via
1037 an optional disable_existing_loggers parameter, but the default value is
1038 such that the old behaviour is preserved. Thanks to Leandro Lucarella for
1041 - Issue #3126: StreamHandler and FileHandler check before calling "flush" and
1042 "close" that the stream object has these, using hasattr (thanks to bobf for
1045 - Issue #2912: platform.uname now tries to determine unknown information even if
1048 - The rfc822 module has been deprecated for removal in 3.0.
1050 - The mimetools module has been deprecated for removal in 3.0.
1052 - The ctypes.byref function now takes an optional second parameter
1053 which allows to specify an offset in bytes for the constructed
1054 pointer-like object.
1056 - Added the ast module.
1058 - Added the multiprocessing module, PEP 371.
1060 - Factored out the indentation cleaning from inspect.getdoc() into
1061 inspect.cleandoc() to ease standalone use.
1063 - Issue #1798: Add ctypes calling convention that allows safe access
1066 - Issue #2404: ctypes objects support the new pep3118 buffer interface.
1068 - Patch #2125: Add GetInteger and GetString methods for
1069 msilib.Record objects.
1071 - Issue #2782: The datetime module's strftime methods now accept
1072 unicode format strings just as time.strftime always has.
1074 - The sgmllib and htmllib modules have been deprecated for removal
1077 - Issue #3011: locale module alias table was updated to the latest
1078 version from the X.org locale.alias file.
1080 - Issue #1797 (partial fix): ctypes NULL function pointers have a
1081 False boolean value now.
1083 - Issue #2985: Allow 64-bit integer responses (``<i8>``) in XMLRPC
1086 - Issue #2877: The UserString.MutableString class has been removed in
1089 - Do not close external file objects passed to tarfile.open(mode='w:bz2')
1090 when the TarFile is closed.
1092 - Issue #2959: For consistency with other file-like objects, gzip's
1093 GzipFile.close() can now be called multiple times without raising
1096 - Issue #1390: Raise ValueError in toxml when an invalid comment would
1097 otherwise be produced.
1099 - Issue #2914: TimedRotatingFileHandler now takes an optional keyword
1100 argument "utc" to use UTC time rather than local time.
1102 - Issue #2929: TimedRotatingFileHandler was using the wrong path when
1103 deleting old log files (filename only instead of full path).
1105 - Issue #1775025: You can now specify zipfile members to open(),
1106 read() or extract() via a ZipInfo instance. This allows handling
1107 duplicate filenames in zipfiles.
1109 - Issue #961805: Fix Text.edit_modified() in Tkinter.
1111 - Issue #1793: Function ctypes.util.find_msvcrt() added that returns
1112 the name of the C runtime library that Python uses.
1113 ctypes.util.find_library(name) now call this function when name is
1116 - The statvfs module has been deprecated for removal in Python 3.0.
1118 - The sunaudiodev and SUNAUDIODEV modules have been deprecated for
1119 removal in Python 3.0.
1121 - The WAIT module from IRIX has been deprecated for removal in Python
1124 - The torgb module from IRIX has been deprecated for removal in Python
1127 - The SV module from IRIX has been deprecated for removal in Python
1130 - The readcd module from IRIX has been deprecated for removal in
1133 - The panelparser module from IRIX has been deprecated for removal in
1136 - The panel module from IRIX has been deprecated for removal in Python
1139 - The jpeg module from IRIX has been deprecated for removal in Python
1142 - The IOCTL module from IRIX has been deprecated for removal in Python
1145 - The IN module from IRIX has been deprecated for removal in Python
1148 - The imgfile module from IRIX has been deprecated for removal in
1151 - The GLWS module from IRIX has been deprecated for removal in Python
1154 - The GET module from IRIX has been deprecated for removal in Python
1157 - The fm module from IRIX has been deprecated for removal in Python
1160 - The FL, flp, and fl modules from IRIX have been deprecated for
1161 removal in Python 3.0.
1163 - The FILE module on IRIX has been deprecated for removal in Python
1166 - The ERRNO module on IRIX has been deprecated for removal in Python
1169 - The DEVICE, GL, gl, and cgen modules (which indirectly includes
1170 cgensupport) have been deprecated for removal in Python 3.0.
1172 - The CL, CL_old, and cl modules for IRIX have been deprecated for
1173 removal in Python 3.0.
1175 - The cdplayer module for IRIX has been deprecated for removal in
1178 - The cddb module for IRIX has been deprecated for removal in Python
1181 - The cd and CD modules for IRIX have been deprecated for removal in
1184 - The al and AL modules for IRIX have been deprecated for removal in
1187 - Issue #1713041: fix pprint's handling of maximum depth.
1189 - The timing module has been deprecated for removal in Python 3.0.
1191 - The sv module has been deprecated for removal in Python 3.0.
1193 - The multifile module has been deprecated as per PEP 4.
1195 - The imageop module has been deprecated for removal in Python 3.0.
1197 - Issue #2250: Exceptions raised during evaluation of names in
1198 rlcompleter's ``Completer.complete()`` method are now caught and
1201 - Issue #2659: Added ``break_on_hyphens`` option to textwrap
1204 - The mhlib module has been deprecated for removal in Python 3.0.
1206 - The linuxaudiodev module has been deprecated for removal in Python
1209 - The ihooks module has been deprecated for removal in Python 3.0.
1211 - The fpformat module has been deprecated for removal in Python 3.0.
1213 - The dl module has been deprecated for removal in Python 3.0.
1215 - The Canvas module has been deprecated for removal in Python 3.0.
1217 - The compiler package has been deprecated for removal in Python 3.0.
1219 - The Bastion and rexec modules have been deprecated for removal in
1222 - The bsddb185 module has been deprecated for removal in Python 3.0.
1224 - The pure module has been deprecated for removal in Python 3.0.
1226 - Issue #2487: change the semantics of math.ldexp(x, n) when n is too
1227 large to fit in a C long. ldexp(x, n) now returns a zero (with
1228 suitable sign) if n is large and negative; previously, it raised
1231 - The toaiff module has been deprecated for removal in Python 3.0.
1233 - The test.testall module has been deprecated for removal in Python
1236 - The new module has been deprecated for removal in Python 3.0.
1238 - The user module has been deprecated for removal in Python 3.0.
1240 - The stringold module has been deprecated for removal in Python 3.0.
1242 - The mutex module has been deprecated for removal in Python 3.0.
1244 - The imputil module has been deprecated for removal in Python 3.0.
1246 - test.test_support.catch_warning() gained a 'record' argument.
1248 - os.path.walk is deprecated in favor of os.walk.
1250 - pdb gained the "until" command.
1252 - The Mac Modules (including Carbon) have been deprecated for removal
1255 - Library: on MacOS X you can now set ``ARCHFLAGS`` in the shell
1256 environment to control the '-arch' flags that are used to build
1257 an extension. This was added for compatibility with Apple's build
1260 - The bundled OSX-specific copy of libbffi is now in sync with the version
1261 shipped with PyObjC 2.0 and includes support for x86_64 and ppc64 platforms.
1263 - The threading module gained aliases for names that will be removed in the
1269 - The Windows installer now includes Tk 8.5, bzip2 1.0.5, and SQLite 3.5.9.
1271 - Patch #1722225: Support QNX 6.
1273 - ``Lib/lib-old`` is now added to sys.path.
1275 - On MacOS X it is now possible to install the framework in 64-bit
1276 mode or even as a 4-way universal binary (that is, PPC, i386,
1277 PPC64 and x86_64 support in one binary).
1279 This is controlled by the configure argument ``--with-universal-archs``:
1281 - ``--with-universal-archs=all``: install 4-way universal
1283 - ``--with-universal-archs=32-bit``: install 2-way universal, 32-bit (the default)
1285 - ``--with-universal-archs=64-bit``: install 2-way universal, 64-bit
1287 This option should be used in combination with ``--enable-universalsdk=``.
1289 NOTE: 64-bit and 4-way builds are only suppported on Mac OS X 10.5 (or later).
1295 - Add ``PyType_Modified()`` as a public API to clear the type cache.
1297 - The PyBytes functions have been renamed to PyByteArray.
1299 - The PyString functions have been renamed to PyBytes. A batch of
1300 defines were added so that the linker still sees the original
1304 What's New in Python 2.6 alpha 3?
1305 =================================
1307 *Release date: 08-May-2008*
1312 - Issue #2719: backported the ``next()`` builtin from Python 3.
1314 - Issue #2681: The octal literal ``0o8`` was incorrecly acctepted. Now
1315 it properly raises a SyntaxError.
1317 - Issue #2617: Reserved -J and -X arguments for Jython, IronPython and
1318 other implementations of Python.
1320 - Implemented PEP 370: Per user site-packages directory.
1325 - Issue #2670: Fix a failure in urllib2.build_opener(), when passed
1326 two handlers that derive the same default base class.
1328 - Added kill, terminate and send_signal(sig) to subprocess.Popen.
1330 - Added phase(z) -> phi, polar(z) -> r, phi and rect(r, phi) -> z to
1333 - Four new methods were added to the math and cmath modules: acosh,
1334 asinh, atanh and log1p.
1336 - zlib.decompressobj().flush(value) no longer crashes the interpreter
1337 when passed a value less than or equal to zero.
1339 - Issue #1631171: Re-implement the 'warnings' module in C (the
1340 original Python code has been kept as backup). This will allow for
1341 using the 'warning's machinery in such places as the parser where
1342 use of pure Python code is not possible. Both the ``showarning()``
1343 and ``formatwarning()`` gain an optional 'line' argument which is
1344 not called by default for backwards-compatibility reasons. Setting
1345 ``warnings.showwarning()`` to an implementation that lacks support
1346 for the ``line`` argument will raise a DeprecationWarning.
1351 - The audiodev module has been deprecated for removal in Python 3.0.
1353 - Issue #2750: Add the 'json' package. Based on simplejson 1.9 and
1354 contributed by Bob Ippolito.
1356 - Issue #1734346: Support Unicode file names for zipfiles.
1358 - Issue #2581: distutils: Vista UAC/elevation support for
1361 - Issue #2635: Fix bug in 'fix_sentence_endings' textwrap.fill option,
1362 where an extra space was added after a word containing (but not
1363 ending in) '.', '!' or '?'.
1365 - Add from_buffer() and from_buffer_copy() class methods to ctypes
1368 - Issue #2682: ctypes callback functions no longer contain a cyclic
1369 reference to themselves.
1371 - The getpass module has been improved on Unix. It now uses /dev/tty
1372 by default and uses stderr instead of stdout. A GetPassWarning is
1373 issued when input echo cannot be controlled.
1375 - Issue #2014: Allow XML-RPC datetime objects to have dates before
1378 - Issue #2439: Added new function pkgutil.get_data(), which is a
1379 convenience wrapper for the PEP 302 get_data() API.
1381 - Issue #2616: The ctypes.pointer() and ctypes.POINTER() functions are
1382 now implemented in C for better performance.
1384 - Issue #2408: The ``_types`` module, which was used as in
1385 implementation detail of the public ``types`` module, has been
1386 removed and replaced by pure python code.
1388 - Issue #2513: distutils on Windows is now capable of cross-compiling
1389 extension modules between 32 and 64 bit platforms. See the distutls
1390 build documentation for more information.
1392 - Issue #815646: Individual file objects may now be used from multiple
1393 threads at once without fear of crashing the Python interpreter. If
1394 file.close() is called while an object is in use by another thread
1395 an IOError exception will be raised and the file will not be closed.
1397 - The bundled libffi copy is now in sync with the recently released
1398 libffi3.0.5 version, apart from some small changes to
1399 Modules/_ctypes/libffi/configure.ac.
1401 - Issue #2385: distutils.core.run_script() makes __file__ available,
1402 so the controlled environment will more closely mirror the typical
1403 script environment. This supports setup.py scripts that refer to
1409 - Issue #2550: The approach used by client/server code for obtaining
1410 ports to listen on in network-oriented tests has been refined in an
1411 effort to facilitate running multiple instances of the entire
1412 regression test suite in parallel without issue.
1413 test_support.bind_port() has been fixed such that it will always
1414 return a unique port -- which wasn't always the case with the
1415 previous implementation, especially if socket options had been set
1416 that affected address reuse (i.e. SO_REUSEADDR, SO_REUSEPORT). The
1417 new implementation of bind_port() will actually raise an exception
1418 if it is passed an AF_INET/SOCK_STREAM socket with either the
1419 SO_REUSEADDR or SO_REUSEPORT socket option set. Furthermore, if
1420 available, bind_port() will set the SO_EXCLUSIVEADDRUSE option on
1421 the socket it's been passed. This currently only applies to
1422 Windows. This option prevents any other sockets from binding to the
1423 host/port we've bound to, thus removing the possibility of the
1424 'non-deterministic' behaviour, as Microsoft puts it, that occurs
1425 when a second SOCK_STREAM socket binds and accepts to a host/port
1426 that's already been bound by another socket. The optional preferred
1427 port parameter to bind_port() has been removed. Under no
1428 circumstances should tests be hard coding ports!
1430 test_support.find_unused_port() has also been introduced, which will
1431 pass a temporary socket object to bind_port() in order to obtain an
1432 unused port. The temporary socket object is then closed and
1433 deleted, and the port is returned. This method should only be used
1434 for obtaining an unused port in order to pass to an external program
1435 (i.e. the -accept [port] argument to openssl's s_server mode) or as
1436 a parameter to a server-oriented class that doesn't give you direct
1437 access to the underlying socket used.
1439 Finally, test_support.HOST has been introduced, which should be used
1440 for the host argument of any relevant socket calls (i.e. bind and
1443 The following tests were updated to following the new conventions:
1444 test_socket, test_smtplib, test_asyncore, test_ssl, test_httplib,
1445 test_poplib, test_ftplib, test_telnetlib, test_socketserver,
1446 test_asynchat and test_socket_ssl.
1448 It is now possible for multiple instances of the regression test
1449 suite to run in parallel without issue.
1454 - Issue #1496032: On alpha, use -mieee when gcc is the compiler.
1456 - Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
1457 gcc is used as compiler.
1459 - Issue #2573: On MacOS X it is now possible to install the framework
1460 with a different name using --with-framework-name=NAME.
1465 - Added implementation of copysign, acosh, asinh, atanh and log1p to
1466 the new files Include/pymath.h and Python/pymath.h for platforms
1467 which provide the functions through their libm. The files also
1468 contains several helpers and constants for math.
1470 - Added a new convenience macro, PyErr_WarnPy3k, for issuing Py3k warnings.
1473 What's New in Python 2.6 alpha 2?
1474 =================================
1476 *Release date: 02-Apr-2008*
1481 - Issue #1733757: The interpreter would hang on shutdown if the
1482 tracing function set by sys.settrace is still active and happens to
1483 call threading.currentThread().
1485 - Patch #1442: properly report exceptions when the PYTHONSTARTUP file
1488 - The compilation of a class nested in another class used to leak one
1489 reference on the outer class name.
1491 - Patch #1810: compile() can now compile _ast trees as returned by
1492 ``compile(..., PyCF_ONLY_AST)``.
1494 - Patch #2426: Added sqlite3.Connection.iterdump method to allow easy
1495 dumping of databases. Contributed by Paul Kippes at PyCon 2008.
1497 - Patch #2477: Added from __future__ import unicode_literals.
1499 - Added backport of bytearray type.
1501 - Issue #2355: add Py3k warning for buffer().
1503 - Issue #1477: With narrow Unicode builds, the unicode escape sequence
1504 \Uxxxxxxxx did not accept values outside the Basic Multilingual
1505 Plane. This affected raw unicode literals and the
1506 'raw-unicode-escape' codec. Now UTF-16 surrogates are generated in
1507 this case, like normal unicode literals and the 'unicode-escape'
1510 - Issue #2348: add Py3k warning for file.softspace.
1512 - Issue #2346/#2347: add Py3k warnings for __methods__ and
1515 - Issue #2358: Add a Py3k warning on sys.exc_clear() usage.
1517 - Issue #2400: Allow relative imports to "import *".
1519 - Issue #1745: Backport print function with ``from __future__ import
1522 - Issue #2332: add new attribute names for instance method objects.
1523 The two changes are: im_self -> __self__ and im_func -> __func__
1525 - Issue #2379: Raise a Py3K warning for __getitem__ or __getslice__ on
1526 exception instances.
1528 - Issue #2371: Add a Py3k warning when catching an exception that
1529 doesn't derive from BaseException.
1531 - Issue #2341: Add a Py3k warning when raising an exception that
1532 doesn't derive from BaseException.
1534 - Issue #2321: use pymalloc for unicode object string data to reduce
1535 memory usage in some circumstances.
1537 - PEP 3127: octal literals now start with "0o". Old-style octal
1538 literals are still valid. There are binary literals with a prefix of
1539 "0b". This also affects int(x, 0).
1541 - Issue #2359: Adding deprecation warnings for array.{read,write}.
1543 - Issue #1779871: GNU gcc can now build Python on OS X because the
1544 flags -Wno-long-double, -no-cpp-precomp, and -mno-fused-madd are no
1547 - Add a warning when asserting a non-empty tuple which is always true.
1549 - Issue #2179: speed up with statement execution by storing the exit
1550 method on the stack instead of in a temporary variable (patch by
1553 - Issue #2238: Some syntax errors in *args and **kwargs expressions
1554 could give bogus error messages.
1556 - Issue #2143: Fix embedded readline() hang on SSL socket EOF.
1561 - Patch #2240: Implement signal.setitimer and signal.getitimer.
1566 - Issue #2315: logging.handlers: TimedRotatingFileHandler now accounts
1567 for daylight savings time in calculating the next rollover.
1569 - Issue #2316: logging.handlers: TimedRotatingFileHandler now
1570 calculates rollovers correctly even when nothing is logged for a
1573 - Issue #2317: logging.handlers: TimedRotatingFileHandler now uses
1574 improved logic for removing old files.
1576 - Issue #2495: tokenize.untokenize now inserts a space between two
1577 consecutive string literals; previously, ["" ""] was rendered as
1578 [""""], which is incorrect python code.
1580 - Issue #2248: return the result of the QUIT command. from
1583 - Backport of Python 3.0's io module.
1585 - Issue #2482: Make sure that the coefficient of a Decimal is always
1586 stored as a str instance, not as a unicode instance. This ensures
1587 that str(Decimal) is always an instance of str.
1589 - Issue #2478: fix failure of decimal.Decimal(0).sqrt()
1591 - Issue #2432: give DictReader the dialect and line_num attributes
1592 advertised in the docs.
1594 - Issue #2460: Make Ellipsis object copyable.
1596 - Issue #1681432: Add triangular distribution to the random module
1598 - Issue #2136: urllib2's auth handler now allows single-quoted realms
1599 in the WWW-Authenticate header.
1601 - Issue #2434: Enhanced platform.win32_ver() to also work on Python
1602 installation which do not have the win32all package installed.
1604 - Added support to platform.uname() to also report the machine and
1605 processor information on Windows XP and later. As a result,
1606 platform.machine() and platform.processor() will report this
1607 information as well.
1609 - The library implementing the 2to3 conversion, lib2to3, was added to
1610 the standard distribution.
1612 - Issue #1747858: Fix chown to work with large uid's and gid's on
1615 - Issue #1202: zlib.crc32 and zlib.adler32 no longer return different
1616 values on 32-bit vs. 64-bit python interpreters. Both were correct,
1617 but they now both return a signed integer object for consistency.
1619 - Issue #1158: add %f format (fractions of a second represented as
1620 microseconds) to datetime objects. Understood by both strptime and
1623 - Issue #705836: struct.pack(">f", x) now raises OverflowError on all
1624 platforms when x is too large to fit into an IEEE 754 float;
1625 previously it only raised OverflowError on non IEEE 754 platforms.
1627 - Issues #2166, #1741 and #1531505: now distutils deals with HOME
1628 correctly under win32
1630 - Patch #1858: distutils: added multiple server support in .pypirc
1632 - Issue #1106316: pdb.post_mortem()'s parameter, "traceback", is now
1633 optional: it defaults to the traceback of the exception that is
1634 currently being handled (is mandatory to be in the middle of an
1635 exception, otherwise it raises ValueError).
1637 - Issue #1193577: A .shutdown() method has been added to SocketServers
1638 which terminates the .serve_forever() loop.
1640 - Issue #2220: handle rlcompleter attribute match failure more
1643 - Issue #2225: py_compile, when executed as a script, now returns a
1644 non- zero status code if not all files could be compiled
1647 - Bug #1725737: In distutils' sdist, exclude RCS, CVS etc. also in the
1648 root directory, and also exclude .hg, .git, .bzr, and _darcs.
1650 - Issue #1872: The struct module typecode for _Bool has been changed
1653 - The bundled libffi copy is now in sync with the recently released
1654 libffi3.0.4 version, apart from some small changes to
1655 Modules/_ctypes/libffi/configure.ac. On OS X, preconfigured libffi
1656 files are used. On all linux systems the --with-system-ffi
1657 configure option defaults to "yes".
1659 - Issue #1577: shutil.move() now calls os.rename() if the destination
1660 is a directory instead of copying-then-remove-source.
1665 - test_nis no longer fails when test.test_support.verbose is true and
1666 NIS is not set up on the testing machine.
1668 - Output comparison tests are no longer supported.
1670 - Rewrite test_errno to use unittest and no longer be a no-op.
1672 - GHOP 234: Convert test_extcall to doctest.
1674 - GHOP 290: Convert test_dbm and test_dummy_threading to unittest.
1676 - GHOP 293: Convert test_strftime, test_getargs, and test_pep247 to
1679 - Issue #2055: Convert test_fcntl to unittest.
1681 - Issue 1960: Convert test_gdbm to unittest.
1683 - GHOP 294: Convert test_contains, test_crypt, and test_select to
1686 - GHOP 238: Convert test_tokenize to use doctest.
1688 - GHOP 237: Rewrite test_thread using unittest.
1690 - Patch #2232: os.tmpfile might fail on Windows if the user has no
1691 permission to create files in the root directory.
1696 - A new script 2to3 is now installed, to run the 2.x to 3.x converter.
1698 - Python/memmove.c and Python/strerror.c have been removed; both
1699 functions are in the C89 standard library.
1701 - Patch #2284: Add -x64 option to rt.bat.
1706 - Patch #2477: Added PyParser_ParseFileFlagsEx() and
1707 PyParser_ParseStringFlagsFilenameEx().
1710 What's New in Python 2.6 alpha 1?
1711 =================================
1713 *Release date: 29-Feb-2008*
1718 - Issue #2051: pyc and pyo files are no longer created with permission
1719 644. The mode is now inherited from the py file.
1721 - Issue #2067: file.__exit__() now calls subclasses' close() method.
1723 - Patch #1759: Backport of PEP 3129 class decorators.
1725 - Issue #1881: An internal parser limit has been increased. Also see
1726 issue 215555 for a discussion.
1728 - Added the future_builtins module, which contains hex() and oct().
1729 These are the PEP 3127 version of these functions, designed to be
1730 compatible with the hex() and oct() builtins from Python 3.0. They
1731 differ slightly in their output formats from the existing, unchanged
1732 Python 2.6 builtins. The expected usage of the future_builtins
1734 from future_builtins import hex, oct
1736 - Issue #1600: Modifed PyOS_ascii_formatd to use at most 2 digit
1737 exponents for exponents with absolute value < 100. Follows C99
1738 standard. This is a change on Windows, which would use 3 digits.
1739 Also, added 'n' to the formats that PyOS_ascii_formatd understands,
1740 so that any alterations it does to the resulting string will be
1741 available in stringlib/formatter.h (for float.__format__).
1743 - Implemented PEP 3101, Advanced String Formatting. This adds a new
1744 builtin format(); a format() method for str and unicode; a
1745 __format__() method to object, str, unicode, int, long, float, and
1746 datetime; the class string.Formatter; and the C API
1749 - Fixed several potential crashes, all caused by specially crafted
1750 __del__ methods exploiting objects in temporarily inconsistent
1753 - Issue #2115: Important speedup in setting __slot__ attributes. Also
1754 prevent a possible crash: an Abstract Base Class would try to access
1755 a slot on a registered virtual subclass.
1757 - Fixed repr() and str() of complex numbers with infinity or nan as
1758 real or imaginary part.
1760 - Clear all free lists during a gc.collect() of the highest generation
1761 in order to allow pymalloc to free more arenas. Python may give back
1762 memory to the OS earlier.
1764 - Issue #2045: Fix an infinite recursion triggered when printing a
1765 subclass of collections.defaultdict, if its default_factory is set
1768 - Fixed a minor memory leak in dictobject.c. The content of the free
1769 list was not freed on interpreter shutdown.
1771 - Limit free list of method and builtin function objects to 256
1774 - Patch #1953: Added ``sys._compact_freelists()`` and the C API
1775 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
1776 to compact the internal free lists of pre-allocted ints and floats.
1778 - Issue #1983: Fixed return type of fork(), fork1() and forkpty()
1779 calls. Python expected the return type int but the fork familie
1782 - Issue #1678380: Fix a bug that identifies 0j and -0j when they
1783 appear in the same code unit.
1785 - Issue #2025: Add tuple.count() and tuple.index() methods to comply
1786 with the collections.Sequence API.
1788 - Patch #1970 by Antoine Pitrou: Speedup unicode whitespace and
1791 - Added ``PyType_ClearCache()`` and ``sys._clear_type_cache`` to clear
1792 the internal lookup cache for ref leak tests.
1794 - Patch #1473257: generator objects gain a gi_code attribute. This is
1795 the same object as the func_code attribute of the function that
1796 produced the generator.
1798 - Issue #1920: "while 0" statements were completely removed by the
1799 compiler, even in the presence of an "else" clause, which is
1800 supposed to be run when the condition is false. Now the compiler
1801 correctly emits bytecode for the "else" suite.
1803 - A few crashers fixed: weakref_in_del.py (issue #1377858);
1804 loosing_dict_ref.py (issue #1303614, test67.py);
1805 borrowed_ref_[34].py (not in tracker).
1807 - Issue #1069410: The "can't load dll" message box on Windows is
1808 suppressed while an extension is loaded by calling SetErrorMode in
1809 dynload_win.c. The error is still reported properly.
1811 - Issue #1915: Python compiles with --enable-unicode=no again. However
1812 several extension methods and modules do not work without unicode
1815 - Issue #1882: when compiling code from a string, encoding cookies in the
1816 second line of code were not always recognized correctly.
1818 - Issue #1679: "0x" was taken as a valid integer literal.
1820 - Issue #1865: ``bytes`` as an alias for ``str`` and b"" as an alias "" were
1823 - sys.float_info / PyFloat_GetInfo: The floating point information
1824 object was converted from a dict to a specialized structseq object.
1826 - Patch #1816: Added sys.flags structseq. It exposes the status of
1827 most command line arguments and PYTHON* environment variables.
1829 - Objects/structseq.c: Implemented new structseq representation. The
1830 patch makes structseqs (e.g. the return value of os.stat) more
1833 - Patch #1700288: added a type attribute cache that caches method
1834 accesses, resulting in speedups in heavily object-oriented code.
1836 - Bug #1776: __import__() no longer accepts filenames on any platform.
1837 The first parameter to __import__() must be a valid module name.
1839 - Patch #1668: renamed THREADDEBUG envvar to PYTHONTHREADDEBUG.
1841 - Patch #602345: Add -B command line option, PYTHONDONTWRITEBYTECODE
1842 envvar and sys.dont_write_bytecode attribute. All these can be set
1843 to forbid Python to attempt to write compiled bytecode files.
1845 - Improve some exception messages when Windows fails to load an
1846 extension module. Now we get for example '%1 is not a valid Win32
1847 application' instead of 'error code 193'.
1849 - Bug #1481296: Fixed long(float('nan')) != 0L.
1851 - Issue #1640: Added math.isinf(x), math.isnan(x) and math.copysign(x,
1854 - Issue #1635: Platform independent creation and representation of NaN
1855 and INF. float("nan"), float("inf") and float("-inf") now work on
1856 every platform with IEEE 754 semantics.
1858 - Compiler now generates simpler and faster code for dictionary
1859 literals. The oparg for BUILD_MAP now indicates an estimated
1860 dictionary size. There is a new opcode, STORE_MAP, for adding
1861 entries to the dictionary.
1863 - Issue #1638: %zd configure test fails on Linux.
1865 - Issue #1620: New property decorator syntax was modifying the
1866 decorator in place instead of creating a new decorator object.
1868 - Issue #1538: Avoid copying string in split/rsplit if the split char
1871 - Issue #1553: An erroneous __length_hint__ can make list() raise a
1874 - PEP 366: Allow explicit relative imports when executing modules
1875 inside packages with the -m switch via a new module level
1876 __package__ attribute.
1878 - Issue #1402: Fix a crash on exit, when another thread is still
1879 running, and if the deallocation of its frames somehow calls the
1880 PyGILState_Ensure() / PyGILState_Release() functions.
1882 - Expose the Py_Py3kWarningFlag as sys.py3kwarning.
1884 - Issue #1445: Fix a SystemError when accessing the ``cell_contents``
1885 attribute of an empty cell object.
1887 - Issue #1460: The utf-7 incremental decoder did not accept truncated
1888 input. It now correctly saves its state between chunks of data.
1890 - Patch #1739468: Directories and zipfiles containing a __main__.py
1891 file can now be directly executed by passing their name to the
1892 interpreter. The directory/zipfile is automatically inserted as the
1893 first entry in sys.path.
1895 - Issue #1265: Fix a problem with sys.settrace, if the tracing
1896 function uses a generator expression when at the same time the
1897 executed code is closing a paused generator.
1899 - sets and frozensets now have an isdisjoint() method.
1901 - optimize the performance of builtin.sum().
1903 - Fix warnings found by the new version of the Coverity checker.
1905 - The enumerate() builtin function is no longer bounded to sequences
1906 smaller than LONG_MAX. Formerly, it raised an OverflowError. Now,
1907 automatically shifts from ints to longs.
1909 - Issue #1686386: Tuple's tp_repr did not take into account the
1910 possibility of having a self-referential tuple, which is possible
1911 from C code. Nor did object's tp_str consider that a type's tp_str
1912 could do something that could lead to an inifinite recursion.
1913 Py_ReprEnter() and Py_EnterRecursiveCall(), respectively, fixed the
1916 - Issue #1164: It was possible to trigger deadlock when using the
1917 'print' statement to write to a file since the GIL was not released
1918 as needed. Now PyObject_Print() does the right thing along with
1919 various tp_print implementations of the built-in types and those in
1920 the collections module.
1922 - Issue #1147: Exceptions were directly allowing string exceptions in
1923 their throw() method even though string exceptions no longer
1926 - Issue #1096: Prevent a segfault from getting the repr of a very
1927 deeply nested list by using the recursion counter.
1929 - Issue #1202533: Fix infinite recursion calls triggered by calls to
1930 PyObject_Call() never calling back out to Python code to trigger
1931 recursion depth updates/checks. Required the creation of a static
1932 RuntimeError instance in case normalizing an exception put the
1933 recursion check value past its limit. Fixes crashers
1934 infinite_rec_(1|2|4|5).py.
1936 - Patch #1031213: Decode source line in SyntaxErrors back to its
1937 original source encoding.
1939 - Patch #1673759: add a missing overflow check when formatting floats
1942 - Prevent expandtabs() on string and unicode objects from causing a
1943 segfault when a large width is passed on 32-bit platforms.
1945 - Issue #1733488: Fix compilation of bufferobject.c on AIX.
1947 - Issue #1722485: remove docstrings again when running with -OO.
1949 - Add new attribute names for function objects. All the func_* become
1950 __*__ attributes. (Some already existed, e.g., __doc__ and
1953 - Add -3 option to the interpreter to warn about features that are
1954 deprecated and will be changed/removed in Python 3.0.
1956 - Patch #1686487: you can now pass any mapping after '**' in function
1959 - except clauses may now be spelled either "except E, target:" or
1960 "except E as target:". This is to provide forwards compatibility
1963 - Deprecate BaseException.message as per PEP 352.
1965 - Issue #1303614: don't expose object's __dict__ when the dict is
1966 inherited from a builtin base.
1968 - When __slots__ are set to a unicode string, make it work the same as
1969 setting a plain string, ie don't expand to single letter identifiers.
1971 - Request #1191699: Slices can now be pickled.
1973 - Request #1193128: str.translate() now allows a None argument for
1974 translations that only remove characters without re-mapping the
1975 remaining characters.
1977 - Patch #1682205: a TypeError while unpacking an iterable is no longer
1978 masked by a generic one with the message "unpack non-sequence".
1980 - Remove unused file Python/fmod.c.
1982 - Bug #1683368: The object.__init__() and object.__new__() methods are
1983 now stricter in rejecting excess arguments. The only time when
1984 either allows excess arguments is when it is not overridden and the
1985 other one is. For backwards compatibility, when both are
1986 overridden, it is a deprecation warning (for now; maybe a Py3k
1987 warning later). Also, type.__init__() insists on the same signature
1988 as supported by type.__new__().
1990 - Patch #1675423: PyComplex_AsCComplex() now tries to convert an
1991 object to complex using its __complex__() method before falling back
1992 to the __float__() method. Therefore, the functions in the cmath
1993 module now can operate on objects that define a __complex__()
1996 - Patch #1623563: allow __class__ assignment for classes with
1997 __slots__. The old and the new class are still required to have the
2000 - Patch #1642547: Fix an error/crash when encountering syntax errors
2001 in complex if statements.
2003 - Patch #1462488: Python no longer segfaults when
2004 ``object.__reduce_ex__()`` is called with an object that is faking
2007 - Patch #1680015: Don't modify __slots__ tuple if it contains an
2010 - Patch #1444529: the builtin compile() now accepts keyword arguments.
2012 - Bug #1678647: write a newline after printing an exception in any
2013 case, even when converting the value to a string failed.
2015 - The dir() function has been extended to call the __dir__() method on
2016 its argument, if it exists. If not, it will work like before. This
2017 allows customizing the output of dir() in the presence of a
2020 - Patch #922167: Python no longer segfaults when faced with infinitely
2021 self-recursive reload() calls (as reported by bug #742342).
2023 - Patch #1675981: remove unreachable code from ``type.__new__()``
2026 - Patch #1491866: change the complex() constructor to allow
2027 parthensized forms. This means complex(repr(x)) now works instead of
2028 raising a ValueError.
2030 - Patch #703779: unset __file__ in __main__ after running a file. This
2031 makes the filenames the warning module prints much more sensible
2032 when a PYTHONSTARTUP file is used.
2034 - Variant of patch #697613: don't exit the interpreter on a SystemExit
2035 exception if the -i command line option or PYTHONINSPECT environment
2036 variable is given, but break into the interactive interpreter just
2037 like on other exceptions or normal program exit.
2039 - Patch #1638879: don't accept strings with embedded NUL bytes in
2042 - Bug #1674503: close the file opened by execfile() in an error
2045 - Patch #1674228: when assigning a slice (old-style), check for the
2046 sq_ass_slice instead of the sq_slice slot.
2048 - When printing an unraisable error, don't print exceptions. before
2049 the name. This duplicates the behavior whening normally printing
2052 - Bug #1653736: Properly discard third argument to
2053 slot_nb_inplace_power.
2055 - PEP 352: Raising a string exception now triggers a TypeError.
2056 Attempting to catch a string exception raises DeprecationWarning.
2058 - Bug #1377858: Fix the segfaulting of the interpreter when an object
2059 created a weakref on itself during a __del__ call for new-style
2060 classes (classic classes still have the bug).
2062 - Bug #1579370: Make PyTraceBack_Here use the current thread, not the
2063 frame's thread state.
2065 - patch #1630975: Fix crash when replacing sys.stdout in
2068 - Prevent seg fault on shutdown which could occur if an object raised
2071 - Bug #1566280: Explicitly invoke threading._shutdown from Py_Main, to
2072 avoid relying on atexit.
2074 - Bug #1590891: random.randrange don't return correct value for big
2077 - Patch #1586791: Better exception messages for some operations on
2078 strings, tuples and lists.
2080 - Bug #1067760: Deprecate passing floats to file.seek.
2082 - Bug #1591996: Correctly forward exception in instance_contains().
2084 - Bug #1588287: fix invalid assertion for `1,2` in debug builds.
2086 - Bug #1576657: when setting a KeyError for a tuple key, make sure
2087 that the tuple isn't used as the "exception arguments tuple".
2089 - Bug #1565514: SystemError not raised on too many nested blocks.
2091 - Bug #1576174: WindowsError now displays the windows error code
2092 again, no longer the posix error code.
2094 - Patch #1549049: Support long values in structmember, issue warnings
2095 if the assigned value for structmember fields gets truncated.
2097 - Update the peephole optimizer to remove more dead code (jumps after
2098 returns) and inline unconditional jumps to returns.
2100 - Bug #1545497: when given an explicit base, int() did ignore NULs
2101 embedded in the string to convert.
2103 - Bug #1569998: break inside a try statement (outside a loop) is now
2104 recognized and rejected.
2106 - list.pop(x) accepts any object x following the __index__ protocol.
2108 - A number of places, including integer negation and absolute value,
2109 were fixed to not rely on undefined behaviour of the C compiler
2112 - Bug #1566800: make sure that EnvironmentError can be called with any
2113 number of arguments, as was the case in Python 2.4.
2115 - Patch #1567691: super() and new.instancemethod() now don't accept
2116 keyword arguments any more (previously they accepted them, but
2119 - Fix a bug in the parser's future statement handling that led to
2120 "with" not being recognized as a keyword after, e.g., this
2121 statement: from __future__ import division, with_statement
2123 - Bug #1557232: fix seg fault with def f((((x)))) and def f(((x),)).
2125 - Fix %zd string formatting on Mac OS X so it prints negative numbers.
2127 - Allow exception instances to be directly sliced again.
2129 - Bug #1551432: Exceptions do not define an explicit __unicode__
2130 method. This allows calling unicode() on exceptions classes
2131 directly to succeed.
2133 - Bug #1542051: Exceptions now correctly call PyObject_GC_UnTrack.
2134 Also make sure that every exception class has __module__ set to
2137 - Bug #1550983: emit better error messages for erroneous relative
2138 imports (if not in package and if beyond toplevel package).
2140 - Overflow checking code in integer division ran afoul of new gcc
2141 optimizations. Changed to be more standard-conforming.
2143 - Patch #1542451: disallow continue anywhere under a finally.
2145 - Patch #1546288: fix seg fault in dict_equal due to ref counting bug.
2147 - The return tuple from str.rpartition(sep) is (tail, sep, head) where
2148 head is the original string if sep was not found.
2150 - Bug #1520864: unpacking singleton tuples in list comprehensions and
2151 generator expressions (x for x, in ... ) works again. Fixing this
2152 problem required changing the .pyc magic number. This means that
2153 .pyc files generated before 2.5c2 will be regenerated.
2155 - ``with`` and ``as`` are now keywords.
2157 - Bug #1664966: Fix crash in exec if Unicode filename can't be
2160 - Issue #1537: Changed GeneratorExit's base class from Exception to
2163 - Issue #1703448: A joined thread could show up in the
2164 threading.enumerate() list after the join() for a brief period until
2171 - Patch #2274: Add heapq.heappushpop().
2173 - Add inspect.isabstract(object) to fix bug #2223
2175 - Add a __format__ method to Decimal, to support PEP 3101.
2177 - Add a timing parameter when using trace.Trace to print out
2180 - Issue #1627: httplib now ignores negative Content-Length headers.
2182 - Issue #900744: If an invalid chunked-encoding header is sent by a
2183 server, httplib will now raise IncompleteRead and close the
2184 connection instead of raising ValueError.
2186 - Issue #1492: The content type of BaseHTTPServer error messages can
2189 - Issue #1781: ConfigParser now does not let you add the "default" section
2192 - Removed uses of dict.has_key() from distutils, and uses of
2193 callable() from copy_reg.py, so the interpreter now starts up
2194 without warnings when '-3' is given. More work like this needs to
2195 be done in the rest of the stdlib.
2197 - Issue #1916: added isgenerator() and isgeneratorfunction() to
2200 - Issue #1224: Fixed bad url parsing when path begins with double
2203 - ctypes instances that are not or do not contain pointers can now be
2206 - Patch #1966: Break infinite loop in httplib when the servers
2207 implements the chunked encoding incorrectly.
2209 - Rename rational.py to fractions.py and the rational.Rational class
2210 to fractions.Fraction, to avoid the name clash with the abstract
2211 base class numbers.Rational. See discussion in issue #1682.
2213 - The pickletools module now provides an optimize() function that
2214 eliminates unused PUT opcodes from a pickle string.
2216 - Patch #2021: Allow tempfile.NamedTemporaryFile and
2217 SpooledTemporaryFile to be used in with statements by correctly
2218 supporting the context management protocol.
2220 - Patch #1979: Add rich comparisons to Decimal, and make Decimal
2221 comparisons involving a NaN follow the IEEE 754 standard.
2223 - Issue #2004: tarfile.py: Use mode 0700 for temporary directories and
2224 default permissions for missing directories.
2226 - Issue #175006: The debugger used to skip the condition of a "while"
2227 statement after the first iteration. Now it correctly steps on the
2228 expression, and breakpoints on the "while" statement are honored on
2231 - Issue #1765140: add an optional delay argument to FileHandler and
2232 its subclasses. Defaults to false (existing behaviour), but if true,
2233 defers opening the file until the first call to emit().
2235 - The pprint module now supports sets and frozensets.
2237 - Issue #1221598: add optional callbacks to ftplib.FTP's storbinary()
2238 and storlines() methods. (Contributed by Phil Schwartz)
2240 - Issue #1715: include sub-extension modules in pydoc's text output.
2242 - Issue #1836: fix an off-by-one bug in TimedRotatingHandler's
2243 rollover time calculation.
2245 - Issue #1021: fix a bug to allow basicConfig to accept NOTSET as a
2248 - Issue #932563: add LoggerAdapter convenience class to make it easier
2249 to add contextual information in logging output.
2251 - Issue #1760556: fix a bug to avoid FileHandler throwing an exception
2254 - Bug #1530959: distutils' build command now uses different build
2255 directory when building extension modules against versions of Python
2256 compiled with ``--with-pydebug``.
2258 - Issue #1555501: move plistlib from plat-mac directory to general
2261 - Issue #1269: fix a bug in pstats.add_callers() and add a unit test
2264 - Issue #1669: don't allow shutil.rmtree() to be called on a symlink
2267 - Issue #1664522: in urllib, don't read non-existing directories in
2268 ftp mode, returning a 0-byte file -- raise an IOError instead.
2270 - Issue #856047: respect the ``no_proxy`` environment variable when
2271 using the ``http_proxy`` etc. environment variables in urllib.
2273 - Issue #1178141: add a getcode() method to the addinfourls that
2274 urllib.open() returns so that you can retrieve the HTTP status code.
2276 - Issue #1003: Fix zipfile decryption check, it would fail zip files
2277 with extended local headers.
2279 - Issue #1189216: Fix the zipfile module to work on archives with
2280 headers past the 2**31 byte boundary.
2282 - Issue #1336: fix a race condition in subprocess.Popen if the garbage
2283 collector kicked in at the wrong time that would cause the process
2284 to hang when the child wrote to stderr.
2286 - Issue #1146: fix how textwrap breaks a long word that would start in
2287 the last column of a line.
2289 - Issue #1693149: trace.py --ignore-module - accept multiple
2290 comma-separated modules to be given.
2292 - Issue #1822: MIMEMultipart.is_multipart() behaves correctly for a
2293 just-created (and empty) instance. Thanks Jonathan Share.
2295 - Issue #1861: Added an attribute to the sched module which returns an
2296 ordered list of upcoming events (displayed as named tuples).
2298 - Issue #1837: The queue module now also supports a LIFO queue and a
2301 - Patch #1048820: Add insert-mode editing to curses.textpad.Textbox
2302 (patch by Stefan Wehr). Also, fix an off-by-one bug in
2305 - Issue #1831: ctypes now raises a TypeError if conflicting positional
2306 and named arguments are passed to a Structure or Union initializer.
2307 When too many positional arguments are passed, also a TypeError is
2308 raised instead of a ValueError.
2310 - Convert the internal ctypes array type cache to a WeakValueDict so
2311 that array types do not live longer than needed.
2313 - Issue #1786: pdb should use its own stdin/stdout around an exec call
2314 and when creating a recursive instance.
2316 - Issue #1698398: ZipFile.printdir() crashed because the format string
2317 expected a tuple type of length six instead of time.struct_time
2320 - Issue #1780: The Decimal constructor now accepts arbitrary leading
2321 and trailing whitespace when constructing from a string.
2322 Context.create_decimal no longer accepts trailing newlines.
2324 - Decimal.as_tuple(), difflib.find_longest_match() and inspect
2325 functions that returned a tuple now return a named tuple.
2327 - Doctest now returns results as a named tuple for readability:
2328 (0, 7) --> TestResults(failed=0, attempted=7)
2330 - Issue #846388:q re.match is interruptible now, which is particularly
2331 good for long regular expression matches.
2333 - Patch #1137: allow setting buffer_size attribute on pyexpat Parser
2334 objects to set the character data buffer size.
2336 - Issue #1757: The hash of a Decimal instance is no longer affected by
2337 the current context.
2339 - Patch #467924: add ZipFile.extract() and ZipFile.extractall() in the
2342 - Issue #1646: Make socket support the TIPC protocol.
2344 - Bug #1742: return os.curdir from os.path.relpath() if both arguments
2345 are equal instead of raising an exception.
2347 - Patch #1637: fix urlparse for URLs like 'http://x.com?arg=/foo'.
2349 - Patch #1698: allow '@' in username parsed by urlparse.py.
2351 - Issue #1735: TarFile.extractall() now correctly sets directory
2352 permissions and times.
2354 - Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a mountpoint.
2356 - Bug #1687: Fxed plistlib.py restricts <integer> to Python int when
2359 - Issue #1700: Regular expression inline flags incorrectly handle
2360 certain unicode characters.
2362 - Issue #1689: PEP 3141, numeric abstract base classes.
2364 - Tk issue #1851526: Return results from Python callbacks to Tcl as
2367 - Issue #1642: Fix segfault in ctypes when trying to delete attributes.
2369 - Issue #1727780: Support loading pickles of random.Random objects
2370 created on 32-bit systems on 64-bit systems, and vice versa. As a
2371 consequence of the change, Random pickles created by Python 2.6
2372 cannot be loaded in Python 2.5.
2374 - Issue #1455: The distutils package now supports VS 2005 and VS 2008
2375 for both the msvccompiler and cygwincompiler.
2377 - Issue #1531: tarfile.py: Read fileobj from the current offset, do
2378 not seek to the start.
2380 - Issue #1534: Added a dictionary sys.float_info with information
2381 about the internal floating point type to the sys module.
2383 - Issue #1429818: patch for trace and doctest modules so they play
2386 - doctest made a bad assumption that a package's __loader__.get_data()
2387 method used universal newlines.
2389 - Issue #1705170: contextlib.contextmanager was still swallowing
2390 StopIteration in some cases. This should no longer happen.
2392 - Issue #1292: On alpha, arm, ppc, and s390 linux systems the
2393 --with-system-ffi configure option defaults to "yes".
2395 - IN module for FreeBSD 8 is added and preexisting FreeBSD 6 and 7
2398 - Issues #1181, #1287: unsetenv() is now called when the
2399 os.environ.pop() and os.environ.clear() methods are used.
2401 - ctypes will now work correctly on 32-bit systems when Python is
2402 configured with --with-system-ffi.
2404 - Patch #1203: ctypes now does work on OS X when Python is built with
2405 --disable-toolbox-glue.
2407 - collections.deque() now supports a "maxlen" argument.
2409 - itertools.count() is no longer bounded to LONG_MAX. Formerly, it
2410 raised an OverflowError. Now, automatically shifts from ints to
2413 - Added itertools.product() which forms the Cartesian product of the
2416 - Added itertools.combinations() and itertools.permutations().
2418 - Patch #1541463: optimize performance of cgi.FieldStorage operations.
2420 - Decimal is fully updated to the latest Decimal Specification
2423 - Bug #1153: repr.repr() now doesn't require set and dictionary items
2424 to be orderable to properly represent them.
2426 - A 'c_longdouble' type was added to the ctypes module.
2428 - Bug #1709599: Run test_1565150 only if the file system is NTFS.
2430 - When encountering a password-protected robots.txt file the
2431 RobotFileParser no longer prompts interactively for a username and
2432 password (bug 813986).
2434 - TarFile.__init__() no longer fails if no name argument is passed and
2435 the fileobj argument has no usable name attribute (e.g. StringIO).
2437 - The functools module now provides 'reduce', for forward
2438 compatibility with Python 3000.
2440 - Server-side SSL support and cert verification added, by Bill
2443 - socket.ssl deprecated; use new ssl module instead.
2445 - uuid creation is now threadsafe.
2447 - EUC-KR codec now handles the cheot-ga-keut composed make-up hangul
2450 - GB18030 codec now can encode additional two-byte characters that are
2453 - Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
2455 - Bug #1704793: Return UTF-16 pair if unicodedata.lookup cannot
2456 represent the result in a single character.
2458 - Bug #978833: Close https sockets by releasing the _ssl object.
2460 - Change location of the package index to pypi.python.org/pypi
2462 - Bug #1701409: Fix a segfault in printing ctypes.c_char_p and
2463 ctypes.c_wchar_p when they point to an invalid location. As a
2464 sideeffect the representation of these instances has changed.
2466 - tarfile.py: Added "exclude" keyword argument to TarFile.add().
2468 - Bug #1734723: Fix repr.Repr() so it doesn't ignore the maxtuple
2471 - The urlopen function of urllib2 now has an optional timeout
2472 parameter (note that it actually works with HTTP, HTTPS, FTP and
2475 - In ftplib, the FTP.ntransfercmd method, when in passive mode, now
2476 uses the socket.create_connection function, using the timeout
2477 specified at connection time.
2479 - Bug #1728403: Fix a bug that CJKCodecs StreamReader hangs when it
2480 reads a file that ends with incomplete sequence and sizehint
2481 argument for .read() is specified.
2483 - Bug #1730389: Change time.strptime() to use ``\s+`` instead of
2484 ``\s*`` when matching spaces in the specified format argument.
2486 - Bugs #1668596/#1720897: distutils now copies data files even if
2487 package_dir is empty.
2489 - sha now raises a DeprecationWarning upon import.
2491 - md5 now raises a DeprecationWarning upon import.
2493 - Issue #1385: The hmac module now computes the correct hmac when
2494 using hashes with a block size other than 64 bytes (such as sha384
2497 - mimify now raises a DeprecationWarning upon import.
2499 - MimeWriter now raises a DeprecationWarning upon import.
2501 - tarfile.py: Improved unicode support. Unicode input names are now
2502 officially supported. Added "errors" argument to the TarFile class.
2504 - urllib.ftpwrapper class now accepts an optional timeout.
2506 - shlex.split() now has an optional "posix" parameter.
2508 - The posixfile module now raises a DeprecationWarning.
2510 - Remove the gopherlib module. This also leads to the removal of
2511 gopher support in urllib/urllib2.
2513 - Fix bug in marshal where bad data would cause a segfault due to lack
2514 of an infinite recursion check.
2516 - Removed plat-freebsd2 and plat-freebsd3 directories (and IN.py in
2519 - HTML-escape the plain traceback in cgitb's HTML output, to prevent
2520 the traceback inadvertently or maliciously closing the comment and
2521 injecting HTML into the error page.
2523 - The popen2 module and os.popen* are deprecated. Use the subprocess
2526 - Added an optional credentials argument to SMTPHandler, for use with
2527 SMTP servers which require authentication.
2529 - Patch #1695948: Added optional timeout parameter to SocketHandler.
2531 - Bug #1652788: Minor fix for currentframe.
2533 - Patch #1598415: Added WatchedFileHandler to better support external
2534 log file rotation using e.g. newsyslog or logrotate. This handler is
2535 only useful in Unix/Linux environments.
2537 - Bug #1706381: Specifying the SWIG option "-c++" in the setup.py file
2538 (as opposed to the command line) will now write file names ending in
2541 - As specified in RFC 2616, an HTTP response like 2xx indicates that
2542 the client's request was successfully received, understood, and
2543 accepted. Now in these cases no error is raised in urllib (issue
2546 - Bug #1290505: time.strptime's internal cache of locale information
2547 is now properly recreated when the locale is changed.
2549 - Patch #1685563: remove (don't add) duplicate paths in
2550 distutils.MSVCCompiler.
2552 - Added a timeout parameter to the constructor of other protocols
2553 (telnetlib, ftplib, smtplib and poplib). This is second part of the
2554 work started with create_connection() and timeout in httplib, and
2555 closes patch #723312.
2557 - Patch #1676823: Added create_connection() to socket.py, which may be
2558 called with a timeout, and use it from httplib (whose HTTPConnection
2559 and HTTPSConnection now accept an optional timeout).
2561 - Bug #978833: Revert r50844, as it broke _socketobject.dup.
2563 - Bug #1675967: re patterns pickled with Python 2.4 and earlier can
2564 now be unpickled with Python 2.5 and newer.
2566 - Patch #1630118: add a SpooledTemporaryFile class to tempfile.py.
2568 - Patch #1273829: os.walk() now has a "followlinks" parameter. If set
2569 to True (which is not the default), it visits symlinks pointing to
2572 - Bug #1681228: the webbrowser module now correctly uses the default
2573 GNOME or KDE browser, depending on whether there is a session of one
2574 of those present. Also, it tries the Windows default browser before
2575 trying Mozilla variants.
2577 - Patch #1339796: add a relpath() function to os.path.
2579 - Patch #1681153: the wave module now closes a file object it opened if
2580 initialization failed.
2582 - Bug #767111: fix long-standing bug in urllib which caused an
2583 AttributeError instead of an IOError when the server's response
2584 didn't contain a valid HTTP status line.
2586 - Patch #957650: "%var%" environment variable references are now
2587 properly expanded in ntpath.expandvars(), also "~user" home
2588 directory references are recognized and handled on Windows.
2590 - Patch #1429539: pdb now correctly initializes the __main__ module
2591 for the debugged script, which means that imports from __main__ work
2594 - The nonobvious commands.getstatus() function is now deprecated.
2596 - Patch #1393667: pdb now has a "run" command which restarts the
2597 debugged Python program, optionally with different arguments.
2599 - Patch #1649190: Adding support for _Bool to ctypes as c_bool.
2601 - Patch #1530482: add pydoc.render_doc() which returns the
2602 documentation for a thing instead of paging it to stdout, which
2605 - Patch #1533909: the timeit module now accepts callables in addition
2606 to strings for the code to time and the setup code. Also added two
2607 convenience functions for instantiating a Timer and calling its
2610 - Patch #1537850: tempfile.NamedTemporaryFile now has a "delete"
2611 parameter which can be set to False to prevent the default
2612 delete-on-close behavior.
2614 - Patch #1581073: add a flag to textwrap that prevents the dropping of
2615 whitespace while wrapping.
2617 - Patch #1603688: ConfigParser.SafeConfigParser now checks values that
2618 are set for invalid interpolation sequences that would lead to
2619 errors on reading back those values.
2621 - Added support for the POSIX.1-2001 (pax) format to
2622 tarfile.py. Extended and cleaned up the test suite. Added a new
2625 - Patch #1449244: Support Unicode strings in
2626 email.message.Message.{set_charset,get_content_charset}.
2628 - Patch #1542681: add entries for "with", "as" and "CONTEXTMANAGERS"
2629 to pydoc's help keywords.
2631 - Patch #1555098: use str.join() instead of repeated string
2632 concatenation in robotparser.
2634 - Patch #1635454: the csv.DictWriter class now includes the offending
2635 field names in its exception message if you try to write a record
2636 with a dictionary containing fields not in the CSV field names list.
2638 - Patch #1668100: urllib2 now correctly raises URLError instead of
2639 OSError if accessing a local file via the file:// protocol fails.
2641 - Patch #1677862: Require a space or tab after import in .pth files.
2643 - Patch #1192590: Fix pdb's "ignore" and "condition" commands so they
2644 trap the IndexError caused by passing in an invalid breakpoint
2647 - Patch #1599845: Add an option to disable the implicit calls to
2648 server_bind() and server_activate() in the constructors for
2649 TCPServer, SimpleXMLRPCServer and DocXMLRPCServer.
2651 - Bug #1531963: Make SocketServer.TCPServer's server_address always be
2652 equal to calling getsockname() on the server's socket. Fixed by
2655 - Patch #742598: Add .timeout attribute to SocketServer that calls
2656 .handle_timeout() when no requests are received.
2658 - Bug #1651235: When a tuple was passed to a ctypes function call,
2659 Python would crash instead of raising an error.
2661 - Bug #1646630: ctypes.string_at(buf, 0) and ctypes.wstring_at(buf, 0)
2662 returned string up to the first NUL character.
2664 - Patch #957003: Implement smtplib.LMTP.
2666 - Patch #1481079: add support for HTTP_REFERER to CGIHTTPServer.
2668 - Patch #1675424: Added tests for uncovered code in the zipfile
2669 module. The KeyError raised by Zipfile.getinfo for nonexistent
2670 names now has a descriptive message.
2672 - Bug #1115886: os.path.splitext('.cshrc') gives now ('.cshrc', '').
2674 - unittest now verifies more of its assumptions. In particular,
2675 TestCase and TestSuite subclasses (not instances) are no longer
2676 accepted in TestSuite.addTest(). This should cause no
2677 incompatibility since it never made sense with ordinary subclasses
2678 -- the failure just occurred later, with a more cumbersome
2681 - Patch #787789: allow to pass custom TestRunner instances to
2682 unittest's main() function.
2684 - Patches #1550273, #1550272: fix a few bugs in unittest and add a
2685 comprehensive test suite for the module.
2687 - Patch #1001604: glob.glob() now returns unicode filenames if it was
2688 given a unicode argument and os.listdir() returns unicode filenames.
2690 - Patch #1673619: setup.py identifies extension modules it doesn't
2691 know how to build and those it knows how to build but that fail to
2694 - Patch #912410: Replace HTML entity references for attribute values
2697 - Patch #1663234: you can now run doctest on test files and modules
2698 using "python -m doctest [-v] filename ...".
2700 - Patch #1121142: Implement ZipFile.open.
2702 - Taught setup.py how to locate Berkeley DB on Macs using MacPorts.
2704 - Added heapq.merge() for merging sorted input streams.
2706 - Added collections.namedtuple() for assigning field names to tuples.
2708 - Added itertools.izip_longest().
2710 - Have the encoding package's search function dynamically import using
2711 absolute import semantics.
2713 - Patch #1647484: Renamed GzipFile's filename attribute to name.
2715 - Patch #1517891: Mode 'a' for ZipFile now creates the file if it
2718 - Patch #698833: Support file decryption in zipfile.
2720 - Patch #685268: Consider a package's __path__ in imputil.
2722 - Patch #1463026: Support default namespace in XMLGenerator.
2724 - Patch #1571379: Make trace's --ignore-dir facility work in the face
2725 of relative directory names.
2727 - Bug #1600860: Search for shared python library in LIBDIR, not
2728 lib/python/config, on "linux" and "gnu" systems.
2730 - Patch #1652681: tarfile.py: create nonexistent files in append mode
2731 and allow appending to empty files.
2733 - Bug #1124861: Automatically create pipes if GetStdHandle fails in
2736 - Patch #1634778: add missing encoding aliases for iso8859_15 and
2739 - Patch #1638243: the compiler package is now able to correctly
2740 compile a with statement; previously, executing code containing a
2741 with statement compiled by the compiler package crashed the
2744 - Bug #1643943: Fix time.strptime's support for the %U directive.
2746 - Patch #1507247: tarfile.py: use current umask for intermediate
2749 - Patch #1627441: close sockets properly in urllib2.
2751 - Bug #494589: make ntpath.expandvars behave according to its
2754 - Changed platform module API python_version_tuple() to actually
2755 return a tuple (it used to return a list).
2757 - Added new platform module APIs python_branch(), python_revision(),
2758 python_implementation() and linux_distribution().
2760 - Added support for IronPython and Jython to the platform module.
2762 - The sets module has been deprecated. Use the built-in set/frozenset
2765 - Bug #1610795: make ctypes.util.find_library work on BSD systems.
2767 - Fixes for 64-bit Windows: In ctypes.wintypes, correct the
2768 definitions of HANDLE, WPARAM, LPARAM data types. Make
2769 parameterless foreign function calls work.
2771 - The version number of the ctypes package changed to "1.1.0".
2773 - Bug #1627575: logging: Added _open() method to FileHandler which can
2774 be used to reopen files. The FileHandler instance now saves the
2775 encoding (which can be None) in an attribute called "encoding".
2777 - Bug #411881: logging.handlers: bare except clause removed from
2778 SMTPHandler.emit. Now, only ImportError is trapped.
2780 - Bug #411881: logging.handlers: bare except clause removed from
2781 SocketHandler.createSocket. Now, only socket.error is trapped.
2783 - Bug #411881: logging: bare except clause removed from
2784 LogRecord.__init__. Now, only ValueError, TypeError and
2785 AttributeError are trapped.
2787 - Patch #1504073: Fix tarfile.open() for mode "r" with a fileobj
2790 - Patch #1182394 from Shane Holloway: speed up HMAC.hexdigest.
2792 - Patch #1262036: Prevent TarFiles from being added to themselves
2793 under certain conditions.
2795 - Patch #1230446: tarfile.py: fix ExFileObject so that read() and
2796 tell() work correctly together with readline().
2798 - Patch #1484695: The tarfile module now raises a HeaderError
2799 exception if a buffer given to frombuf() is invalid.
2801 - Bug #1503765: Fix a problem in logging.config with spaces in comma-
2802 separated lists read from logging config files.
2804 - Patch #1604907: Fix problems in logging.handlers caused at logging
2805 shutdown when syslog handlers fail to initialize because of syslogd
2808 - Patch #1608267: fix a race condition in os.makedirs() if the
2809 directory to be created is already there.
2811 - Patch #1610437: fix a tarfile bug with long filename headers.
2813 - Patch #1371075: Make ConfigParser accept optional dict type for
2814 ordering, sorting, etc.
2816 - Bug #1563807: _ctypes built on AIX fails with ld ffi error.
2818 - Bug #1598620: A ctypes Structure cannot contain itself.
2820 - Patch #1070046: Marshal new-style objects like InstanceType in
2823 - cStringIO.truncate(-1) now raises an IOError, like StringIO and
2826 - Patch #1472877: Fix Tix subwidget name resolution.
2828 - Patch #1594554: Always close a tkSimpleDialog on ok(), even if an
2831 - Patch #1538878: Don't make tkSimpleDialog dialogs transient if the
2832 parent window is withdrawn.
2834 - Bug #1597824: return the registered function from atexit.register()
2835 to facilitate usage as a decorator.
2837 - Patch #1360200: Use unmangled_version RPM spec field to deal with
2840 - Patch #1359217: Process 2xx response in an ftplib transfer that
2841 precedes an 1xx response.
2843 - Patch #1355023: support whence argument for GzipFile.seek.
2845 - Patch #1065257: Support passing open files as body in
2846 HTTPConnection.request().
2848 - Bug #1569790: mailbox.py: Maildir.get_folder() and MH.get_folder()
2849 weren't passing the message factory on to newly created Maildir/MH
2852 - Patch #1514543: mailbox.py: In the Maildir class, report errors if
2853 there's a filename clash instead of possibly losing a message.
2854 (Patch by David Watson.)
2856 - Patch #1514544: Try to ensure that messages/indexes have been
2857 physically written to disk after calling .flush() or
2858 .close(). (Patch by David Watson.)
2860 - Patch #1592250: Add elide argument to Tkinter.Text.search.
2862 - Patch #838546: Make terminal become controlling in pty.fork().
2864 - Patch #1351744: Add askyesnocancel helper for tkMessageBox.
2866 - Patch #1060577: Extract list of RPM files from spec file in
2869 - Bug #1586613: fix zlib and bz2 codecs' incremental en/decoders.
2871 - Patch #1583880: fix tarfile's problems with long names and posix/
2874 - Bug #1586448: the compiler module now emits the same bytecode for
2875 list comprehensions as the builtin compiler, using the LIST_APPEND
2878 - Fix codecs.EncodedFile which did not use file_encoding in 2.5.0, and
2879 fix all codecs file wrappers to work correctly with the "with"
2880 statement (bug #1586513).
2882 - Lib/modulefinder.py now handles absolute and relative imports
2885 - Patch #1567274: Support SMTP over TLS.
2887 - Patch #1560695: Add .note.GNU-stack to ctypes' sysv.S so that ctypes
2888 isn't considered as requiring executable stacks.
2890 - ctypes callback functions only support 'fundamental' data types as
2891 result type. Raise an error when something else is used. This is a
2892 partial fix for Bug #1574584.
2894 - Fix turtle so that time.sleep is imported for the entire library.
2895 Allows the demo2 function to be executed on its own instead of only
2896 when the module is run as a script.
2898 - Bug #813342: Start the IDLE subprocess with -Qnew if the parent is
2899 started with that option.
2901 - Bug #1565150: Fix subsecond processing for os.utime on Windows.
2903 - Support for MSVC 8 was added to bdist_wininst.
2905 - Bug #1446043: correctly raise a LookupError if an encoding name
2906 given to encodings.search_function() contains a dot.
2908 - Bug #1560617: in pyclbr, return full module name not only for
2909 classes, but also for functions.
2911 - Bug #1457823: cgi.(Sv)FormContentDict's constructor now takes
2912 keep_blank_values and strict_parsing keyword arguments.
2914 - Bug #1566602: correct failure of posixpath unittest when $HOME ends
2917 - Bug #1565661: in webbrowser, split() the command for the default
2918 GNOME browser in case it is a command with args.
2920 - Made the error message for time.strptime when the data data and
2921 format do match be more clear.
2923 - Fix a bug in traceback.format_exception_only() that led to an error
2924 being raised when print_exc() was called without an exception set.
2925 In version 2.4, this printed "None", restored that behavior.
2927 - Make webbrowser.BackgroundBrowser usable in Windows (it wasn't
2928 because the close_fds arg to subprocess.Popen is not supported).
2930 - Reverted patch #1504333 to sgmllib because it introduced an infinite
2933 - Patch #1553314: Fix the inspect.py slowdown that was hurting IPython
2934 & SAGE by adding smarter caching in inspect.getmodule()
2936 - Fix missing import of the types module in logging.config.
2938 - Patch #1550886: Fix decimal module context management implementation
2939 to match the localcontext() example from PEP 343.
2941 - Bug #1545341: The 'classifier' keyword argument to the Distutils
2942 setup() function now accepts tuples as well as lists.
2944 - Bug #1541863: uuid.uuid1 failed to generate unique identifiers on
2945 systems with low clock resolution.
2947 - Bug #1531862: Do not close standard file descriptors in subprocess.
2949 - idle: Honor the "Cancel" action in the save dialog (Debian bug
2952 - Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
2953 the first chunk fed to the decoder started with a BOM, but was
2954 longer than 3 bytes.
2956 - The implementation of UnicodeError objects has been simplified
2957 (start and end attributes are now stored directly as Py_ssize_t
2960 - Issue #829951: In the smtplib module, SMTP.starttls() now complies
2961 with RFC 3207 and forgets any knowledge obtained from the server not
2962 obtained from the TLS negotiation itself. Patch contributed by Bill
2965 - Issue #1339: The smtplib.SMTP class has been refactored a bit such
2966 that the SMTP.starttls() caller no longer needs to call ehlo()
2967 beforehand. SMTP.starttls() now raises an exception of the server
2968 does not claim to support starttls. Adds the
2969 SMTP.ehlo_or_helo_if_needed() method. Patch contributed by Bill
2972 - Patch #1089358: Add signal.siginterrupt, a wrapper around
2978 - Patch #1657: added select.epoll and select.kqueue.
2980 - Patch #1506171: added operator.methodcaller().
2982 - Patch #1826: operator.attrgetter() now supports dotted attribute paths.
2984 - Patch #1957: syslogmodule: Release GIL when calling syslog(3).
2986 - Bug #2112: mmap.error is now a subclass of EnvironmentError and not
2987 a direct EnvironmentError.
2989 - Bug #2111: mmap segfaults when trying to write a block opened with
2992 - Bug #2063: correct order of utime and stime in os.times() result on
2995 - Patch #1736: Fix file name handling of _msi.FCICreate.
2997 - Updated ``big5hkscs`` codec to the HKSCS revision of 2004.
2999 - Issue #1940: make it possible to use curses.filter() before
3000 curses.initscr() as the documentation says.
3002 - Backport of _fileio module from Python 3.0.
3004 - Patch #1087741: mmap.mmap is now a class, not a factory function. It
3005 is also subclassable now.
3007 - Patch #1648: added ``sys.getprofile()`` and ``sys.gettrace()``.
3009 - Patch #1663329: added ``os.closerange()`` function to quickly close
3010 a range of file descriptors without considering errors.
3012 - Patch #976880: ``mmap`` objects now have an ``rfind`` method that
3013 works as expected. ``mmap.find`` also takes an optional ``end``
3016 - _winreg's HKEY object has gained __enter__ and __exit__ methods to
3017 support the context manager protocol. The _winreg module also
3018 gained a new function ``ExpandEnvironmentStrings`` to expand
3021 - itertools.starmap() now accepts any iterable input. Previously, it
3022 required the function inputs to be tuples.
3024 - itertools.chain() now has an alternate constructor,
3025 chain.from_iterable().
3027 - Issue #1646: Make socket support TIPC. The socket module now has
3028 support for TIPC under Linux, see http://tipc.sf.net/ for more
3031 - Added interface for Windows' WSAIoctl to socket object and added an
3032 example for a simple network sniffer.
3034 - Bug #1301: Bad assert in _tkinter fixed.
3036 - Added bdist_wininst executable for VS 2008.
3038 - Bug #1604: collections.deque.__init__(iterable) now clears any prior
3039 contents before adding elements from the iterable. This fix brings
3040 the behavior into line with that for list.__init__().
3042 - Added wide char functions to msvcrt module: getwch, getwche, putwch
3043 and ungetwch. The functions accept or return unicode.
3045 - os.access now returns True on Windows for any existing directory.
3047 - Added warnpy3k function to the warnings module.
3049 - Marshal.dumps() now expects exact type matches for int, long, float,
3050 complex, tuple, list, dict, set, and frozenset. Formerly, it would
3051 silently miscode subclasses of those types. Now, it raises a
3054 - Patch #1388440: Add set_completion_display_matches_hook and
3055 get_completion_type to readline.
3057 - Bug #1649098: Avoid declaration of zero-sized array declaration in
3060 - Removed the rgbimg module; been deprecated since Python 2.5.
3062 - Bug #1721309: prevent bsddb module from freeing random memory.
3064 - Bug #1233: fix bsddb.dbshelve.DBShelf append method to work as
3065 intended for RECNO databases.
3067 - pybsddb.sf.net Bug #477182: Load the database flags at database open
3068 time so that opening a database previously created with the DB_DUP
3069 or DB_DUPSORT flag set will keep the proper behavior on subsequent
3070 opens. Specifically: dictionary assignment to a DB object will
3071 replace all values for a given key when the database allows
3072 duplicate values. DB users should use DB.put(k, v) when they want
3073 to store duplicates; not DB[k] = v.
3075 - Add the bsddb.db.DBEnv.lock_id_free method.
3077 - Bug #1686475: Support stat'ing open files on Windows again.
3079 - Patch #1185447: binascii.b2a_qp() now correctly quotes binary
3080 characters with ASCII value less than 32. Also, it correctly quotes
3081 dots only if they occur on a single line, as opposed to the previous
3082 behavior of quoting dots if they are the second character of any
3085 - Bug #1622896: fix a rare corner case where the bz2 module raised an
3086 error in spite of a succesful compression.
3088 - Patch #1654417: make operator.{get,set,del}slice use the full range
3091 - Patch #1646728: datetime.fromtimestamp fails with negative
3092 fractional times. With unittest.
3094 - Patch #1490190: posixmodule now includes os.chflags() and
3095 os.lchflags() functions on platforms where the underlying system
3096 calls are available.
3098 - Patch #1494140: Add documentation for the new struct.Struct object.
3100 - Patch #1432399: Support the HCI protocol for bluetooth sockets
3102 - Patch #1657276: Make NETLINK_DNRTMSG conditional.
3104 - Bug #1653736: Complain about keyword arguments to time.isoformat.
3106 - Bug #1486663: don't reject keyword arguments for subclasses of
3109 - Patch #1610575: The struct module now supports the 't' code, for C99
3112 - Patch #1635058: ensure that htonl and friends never accept or return
3113 negative numbers, per the underlying C implementation.
3115 - Patch #1544279: Improve thread-safety of the socket module by moving
3116 the sock_addr_t storage out of the socket object.
3118 - Patch #1019808: fix bug that causes an incorrect error to be
3119 returned when a socket timeout is set and a connection attempt
3122 - Speed up function calls into the math module.
3124 - Bug #1588217: don't parse "= " as a soft line break in binascii's
3125 a2b_qp() function, instead leave it in the string as quopri.decode()
3128 - Bug #1599782: Fix segfault on bsddb.db.DB().type().
3130 - Bug #1567666: Emulate GetFileAttributesExA for Win95.
3132 - Patch #1576166: Support os.utime for directories on Windows NT+.
3134 - Patch #1572724: fix typo ('=' instead of '==') in _msi.c.
3136 - Bug #1572832: fix a bug in ISO-2022 codecs which may cause segfault
3137 when encoding non-BMP unicode characters.
3139 - Bug #1556784: allow format strings longer than 127 characters in
3140 datetime's strftime function.
3142 - Fix itertools.count(n) to work with negative numbers again.
3144 - RLIMIT_SBSIZE was added to the resource module where available.
3146 - Bug #1551427: fix a wrong NULL pointer check in the win32 version of
3149 - Bug #1548092: fix curses.tparm seg fault on invalid input.
3151 - Patch #1114: fix curses module compilation on 64-bit AIX, & possibly
3152 other 64-bit LP64 platforms where attr_t is not the same size as a
3153 long. (Contributed by Luke Mewburn.)
3155 - Bug #1550714: fix SystemError from itertools.tee on negative value
3158 - Fixed a few bugs on cjkcodecs:
3159 - gbk and gb18030 codec now handle U+30FB KATAKANA MIDDLE DOT
3161 - iso2022_jp_2 codec now encodes into G0 for KS X 1001, GB2312
3162 codepoints to conform the standard.
3163 - iso2022_jp_3 and iso2022_jp_2004 codec can encode JIS X 0213:2
3166 - Bug #1552726: in readline.c, avoid repeatedly polling in interactive
3167 mode by only placing a timeout on the select() if an input hook has
3168 been defined. This prevents an interactive Python from waking up 10
3169 times per second. Patch by Richard Boulton.
3171 - fixed a bug with bsddb.DB.stat: the flags and txn keyword arguments
3174 - Added support for linking the bsddb module against BerkeleyDB 4.5.x,
3177 - Bug #1633621: if curses.resizeterm() or curses.resize_term() is
3178 called, update _curses.LINES, _curses.COLS, curses.LINES and
3181 - Fix an off-by-one bug in locale.strxfrm().
3183 - Fix libffi configure for hppa*-*-linux* | parisc*-*-linux*.
3185 - Build using system ffi library on arm*-linux*.
3187 - Bug #1372: zlibmodule.c: int overflow in PyZlib_decompress
3189 - bsddb module: Fix memory leak when using database cursors on
3190 databases without a DBEnv.
3192 - The sqlite3 module was updated to pysqlite 2.4.1.
3197 - Refactor test_logging to use unittest.
3199 - Refactor test_profile and test_cprofile to use the same code to
3202 - Make test_runpy reentrant by fixing _check_module to clear out any
3203 module being tested. Was causing an error by __import__ doing a
3204 reload on the second run and thus suppressing bytecode recreation.
3206 - Capture socket connection resets and timeouts in test_socket_ssl and
3207 test_urllib2net and raise test.test_support.ResourceDenied.
3209 - Patch #1559413: Fix test_cmd_line if sys.executable contains a
3212 - Added test.test_support.TransientResource which is a context manager
3213 to surround calls to resources that are not guaranteed to work even
3214 if test.test_support.requires says that the resource should exist.
3216 - Added a test for slicing of an exception.
3218 - Added test.test_support.EnvironmentVarGuard. It's a class that
3219 provides a context manager so that one can temporarily set or unset
3220 environment variables.
3222 - Added some tests for modulefinder.
3224 - Converted test_imp to use unittest.
3226 - Fix bsddb test_basics.test06_Transactions to check the version
3229 - test.test_support.catch_warning is a new context manager that can be
3230 used to catch the warnings issued by the warning framework.
3235 - Tools/scripts/reindent.py now creates the backup file using
3236 shutil.copy to preserve user/group and permissions. Added also a
3237 --nobackup option to not create the backup if the user is concerned
3238 regarding this. Check issue 1050828 for more details.
3240 - Tools/scripts/win_add2path.py was added. The simple script modifes
3241 the PATH environment var of the HKCU tree and adds the python bin
3242 and script directory.
3244 - Tools/18n/pygettext.py was added to the list of scripts installed by
3245 Tools/scripts/setup.py (tracker item 642309).
3247 - Added IronPython and Jython support to pybench (part of which was
3250 - Made some minor changes to pybench output to allow the user to see
3251 which Python version is running pybench.
3253 - Added support for the new platform module feature
3254 platform.python_implementation(); this will now be saved in the
3261 - RFE #1765140: Updated documentation on FileHandler and subclasses to
3262 include new optional delay argument.
3264 - Bug #932563: Added section on getting contextual information into
3265 logging output, and added documentation for the new LoggerAdapter
3268 - Bug #1295: Added information about caching of formatted exception
3269 information in the LogRecord by Formatter.format().
3271 - Bug #1637365: add subsection about "__name__ == __main__" to the
3274 - Patch #1698768: updated the "using Python on the Mac" intro.
3276 - Bug #1569057: Document that calling file.next() when the file is
3277 open for writing is undefined.
3279 - Patch #1489771: the syntax rules in Python Reference Manual were
3280 updated to reflect the current Python syntax.
3282 - Patch #1686451: Fix return type for
3283 PySequence_{Count,Index,Fast_GET_SIZE}.
3285 - Patch #1679379: add documentation for fnmatch.translate().
3287 - Bug #1629566: clarify the docs on the return values of parsedate()
3288 and parsedate_tz() in email.utils and rfc822.
3290 - Patch #1671450: add a section about subclassing builtin types to the
3291 "extending and embedding" tutorial.
3293 - Bug #1629125: fix wrong data type (int -> Py_ssize_t) in PyDict_Next
3296 - Bug #1565919: document set types in the Language Reference.
3298 - Bug #1546052: clarify that PyString_FromString(AndSize) copies the
3299 string pointed to by its parameter.
3301 - Bug #1566663: remove obsolete example from datetime docs.
3303 - Bug #1541682: Fix example in the "Refcount details" API docs.
3304 Additionally, remove a faulty example showing PySequence_SetItem
3305 applied to a newly created list object and add notes that this isn't
3312 - Patch #1552024: add decorator support to unparse.py demo script.
3314 - Make auto-generated python.vim file list built-ins and exceptions in
3315 alphatbetical order. Makes output more deterministic and easier to
3316 tell if the file is stale or not.
3318 - Bug #1546372: Fixed small bugglet in pybench that caused a missing
3319 file not to get reported properly.
3325 - Have the search path for building extensions follow the declared
3326 order in $CPPFLAGS and $LDFLAGS when adding directories from those
3327 environment variables.
3329 - Bug #1983: Added a check to pyport to verify that sizeof(pid_t) is
3330 smaller or equal sizeof(long).
3332 - Bug #1234: Fixed semaphore errors on AIX 5.2
3334 - Issue #1726: Remove Python/atof.c from PCBuild/pythoncore.vcproj.
3336 - Removed PCbuild8/ directory and added a new build directory for VS
3337 2005 based on the VS 2008 build directory to PC/VS8.0. The script
3338 PCbuild/vs8to9.py was added to sync changes from PCbuild to
3341 - Moved PCbuild/ directory for VS 2003 to PC/VS7.1 and renamed
3342 PCBuild9/ directory to PCBuild/.
3344 - Bug #1699: Define _BSD_SOURCE only on OpenBSD.
3346 - Bug #1608: use -fwrapv when GCC supports it. This is important,
3347 newer GCC versions may optimize away overflow buffer overflow checks
3348 without this option!
3350 - Patch #1418: Make the AC_REPLACE_FUNCS object files actually work.
3352 - Add a FAST_LOOPS build option that speeds-up looping by trading away
3353 periodic threadstate and signal checking in tight loops. By
3354 default, this option is turned-off. It should only be enabled in
3355 debugged, performance critical applications.
3357 - Patch #786737: Allow building in a tree of symlinks pointing to a
3360 - Bug #1737210: Change Manufacturer of Windows installer to PSF.
3362 - Bug #1746880: Correctly install DLLs into system32 folder on Win64.
3364 - Define _BSD_SOURCE, to get access to POSIX extensions on OpenBSD
3367 - Stop supporting AtheOS and cause a build error in configure for the
3370 - Bug #1655392: don't add -L/usr/lib/pythonX.Y/config to the LDFLAGS
3371 returned by python-config if Python was built with --enable-shared
3372 because that prevented the shared library from being used.
3374 - Patch #1569798: fix a bug in distutils when building Python from a
3375 directory within sys.exec_prefix.
3377 - Bug #1675511: Use -Kpic instead of -xcode=pic32 on Solaris/x86.
3379 - Disable _XOPEN_SOURCE on NetBSD 1.x.
3381 - configure now checks whether gcc supports the PyArg_ParseTuple
3384 - Bug #1578513: Cross compilation was broken by a change to configure.
3385 Repair so that it's back to how it was in 2.4.3.
3387 - Patch #1576954: Update VC6 build directory; remove redundant files
3390 - Bug #1568842: Fix test for uintptr_t.
3392 - Patch #1540470: for OpenBSD 4.0.
3394 - Fix build failure on kfreebsd and on the hurd.
3396 - Fix the build of the library reference in info format.
3398 - Allow Emacs 22 for building the documentation in info format.
3400 - Makefile.pre.in(buildbottest): Run an optional script
3401 pybuildbot.identify to include some information about the build
3408 - Unified naming convention for free lists and their limits. All free
3409 lists in Object/ are named ``free_list``, the counter ``numfree``
3410 and the upper limit is a macro ``PyName_MAXFREELIST`` inside an
3413 - ``PySet_Add()`` can now modify a newly created frozenset. Similarly
3414 to ``PyTuple_SetItem``, it can be used to populate a brand new
3415 frozenset; but it does not steal a reference to the added item.
3417 - Added ``PySet_Check()`` and ``PyFrozenSet_Check()`` to the set API.
3419 - Backport of PyUnicode_FromString(), _FromStringAndSize(), _Format
3420 and _FormatV from Python 3.0. Made PyLong_AsSsize_t and
3421 PyLong_FromSsize_t public functions.
3423 - Patch #1720595: add T_BOOL to the range of structmember types.
3425 - Issue #1534: Added ``PyFloat_GetMax()``, ``PyFloat_GetMin()`` and
3426 ``PyFloat_GetInfo()`` to the float API.
3428 - Issue #1521: On 64bit platforms, using PyArgs_ParseTuple with the t#
3429 of w# format code incorrectly truncated the length to an int, even
3430 when PY_SSIZE_T_CLEAN is set. The str.decode method used to return
3431 incorrect results with huge strings.
3433 - Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
3434 Py_TYPE and Py_REFCNT.
3436 - PEP 3123: Provide forward compatibility with Python 3.0, while
3437 keeping backwards compatibility. Add Py_Refcnt, Py_Type, Py_Size,
3438 and PyVarObject_HEAD_INIT.
3440 - Py_ssize_t fields work in structmember when HAVE_LONG_LONG is not
3443 - Patch #1733960: Allow T_LONGLONG to accept ints.
3445 - T_PYSSIZET can now be used in PyMemberDef lists for Py_ssize_t members.
3447 - Added a new API function ``PyImport_ImportModuleNoBlock``.
3449 - Bug #1637022: Prefix AST symbols with _Py_.
3451 - Fix some leftovers from the conversion from int to Py_ssize_t
3452 (relevant to strings and sequences of more than 2**31 items).
3454 - Make _PyGILState_NoteThreadState() static, it was not used anywhere
3455 outside of pystate.c and should not be necessary.
3457 - ``PyImport_Import`` and ``PyImport_ImportModule`` now always do
3458 absolute imports. In earlier versions they might have used relative
3459 imports under some conditions.
3461 - Added case insensitive comparison methods ``PyOS_stricmp(char*,
3462 char*)`` and ``PyOS_strnicmp(char*, char*, Py_ssize_t)``.
3464 - Bug #1542693: remove semi-colon at end of PyImport_ImportModuleEx
3465 macro so it can be used as an expression.
3471 - Patch #1706: Drop support for Win9x, WinME and NT4. Python now
3472 requires Windows 2000 or greater. The _WINVER and NTDDI_VERSION
3473 macros are set to Win2k for x86/32bit builds and WinXP for AMD64
3476 - Conditionalize definition of _CRT_SECURE_NO_DEPRECATE and
3477 _CRT_NONSTDC_NO_DEPRECATE.
3479 - Bug #1216: Restore support for Visual Studio 2002.
3485 - cfmfile now raises a DeprecationWarning.
3487 - buildtools now raises a DeprecationWarning.
3489 - Removed the macfs module. It had been deprecated since Python 2.5.
3490 This lead to the deprecation of macostools.touched() as it relied
3491 solely on macfs and was a no-op under OS X.
3495 **(For information about older versions, consult the HISTORY file.)**