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 - Remove length limitation when constructing a complex number from a
18 - Removed _PyOS_double_to_string. Use PyOS_double_to_string
19 instead. This is in preparation for (but not strictly related to)
20 issue #7117, short float repr.
22 - Issue #1087418: Boost performance of bitwise operations for longs.
24 - Issue #1722344: threading._shutdown() is now called in Py_Finalize(), which
25 fixes the problem of some exceptions being thrown at shutdown when the
26 interpreter is killed. Patch by Adam Olsen.
28 - Issue #7168: Document PyFloat_AsString and PyFloat_AsReprString, and
29 note that they are unsafe and deprecated.
31 - Issue #7120: logging: Removed import of multiprocessing which is causing
34 - Issue #7140: The __dict__ of a module should not be cleared unless the module
35 is the only object holding a reference to it.
37 - Issue #1754094: Improve the stack depth calculation in the compiler.
38 There should be no other effect than a small decrease in memory use.
39 Patch by Christopher Tur Lesniewski-Laas.
41 - Issue #7084: Fix a (very unlikely) crash when printing a list from one
42 thread, and mutating it from another one. Patch by Scott Dial.
44 - Issue #1571184: The Unicode database contains properties for more characters.
45 The tables for code points representing numeric values, white spaces or line
46 breaks are now generated from the official Unicode Character Database files,
47 and include information from the Unihan.txt file.
49 - Issue #7050: Fix a SystemError when trying to use unpacking and augmented
52 - Issue #5329: Fix os.popen* regression from 2.5 with commands as a
53 sequence running through the shell. Patch by Jean-Paul Calderone
56 - Issue #7019: Raise ValueError when unmarshalling bad long data, instead
57 of producing internally inconsistent Python longs.
59 - Issue #6990: Fix threading.local subclasses leaving old state around
60 after a reference cycle GC which could be recycled by new locals.
62 - Issue #6300: unicode.encode, unicode.decode, str.decode, and str.encode now
63 take keyword arguments.
65 - Issue #6922: Fix an infinite loop when trying to decode an invalid
66 UTF-32 stream with a non-raising error handler like "replace" or "ignore".
68 - Issue #6713: Improve performance of base 10 int -> string and
69 long -> string conversions.
71 - Issue #1590864: Fix potential deadlock when mixing threads and fork().
73 - Issue #6844: Do not emit DeprecationWarnings when accessing a "message"
74 attribute on exceptions that was set explicitly.
76 - Issue #6846: Fix bug where bytearray.pop() returns negative integers.
78 - classmethod no longer checks if its argument is callable.
80 - Issue #6750: A text file opened with io.open() could duplicate its output
81 when writing from multiple threads at the same time.
83 - Issue #6704: Improve the col_offset in AST for "for" statements with
84 a target of tuple unpacking.
86 - Issue #6707: dir() on an uninitialized module caused a crash.
88 - Issue #6540: Fixed crash for bytearray.translate() with invalid parameters.
90 - Issue #6573: set.union() stopped processing inputs if an instance of self
91 occurred in the argument chain.
93 - Issue #1616979: Added the cp720 (Arabic DOS) encoding.
95 - Issue #6070: On posix platforms import no longer copies the execute bit
96 from the .py file to the .pyc file if it is set. Patch by Marco N.
98 - Issue #4618: When unicode arguments are passed to print(), the default
99 separator and end should be unicode also.
101 - Issue #6119: Fixed a incorrect Py3k warning about order comparisons of builtin
102 functions and methods.
104 - Issue #6347: Include inttypes.h as well as stdint.h in pyport.h.
105 This fixes a build failure on HP-UX: int32_t and uint32_t are
106 defined in inttypes.h instead of stdint.h on that platform.
108 - Issue #4856: Remove checks for win NT.
110 - Issue #2016: Fixed a crash in a corner case where the dictionary of keyword
111 arguments could be modified during the function call setup.
113 - Removed the ipaddr module.
115 - Issue #6329: Fixed iteration for memoryview objects (it was being blocked
116 because it wasn't recognized as a sequence).
118 - Issue #6289: Encoding errors from compile() were being masked.
120 - When no module is given in a relative import, the module field of the
121 ImportFrom AST node is now None instead of an empty string.
123 - Assignment to None using import statements now raises a SyntaxError.
125 - Issue #4547: When debugging a very large function, it was not always
126 possible to update the lineno attribute of the current frame.
128 - Issue #5330: C functions called with keyword arguments were not reported by
129 the various profiling modules (profile, cProfile). Patch by Hagen Fürstenau.
131 - Issue #5982: staticmethod and classmethod now expose the wrapped
132 function with __func__.
134 - Added support for multiple context managers in the same with-statement.
135 Deprecated contextlib.nested() which is no longer needed.
137 - Issue #6101: A new opcode, SETUP_WITH, has been added to speed up the with
138 statement and correctly lookup the __enter__ and __exit__ special methods.
140 - Issue #5829: complex("1e500") no longer raises OverflowError. This
141 makes it consistent with float("1e500") and interpretation of real
142 and imaginary literals.
144 - Issue #3527: Removed Py_WIN_WIDE_FILENAMES which is not used any more.
146 - __instancecheck__ and __subclasscheck__ are now completely ignored on classic
147 classes and instances.
149 - Issue #5994: the marshal module now has docstrings.
151 - Issue #5981: Fix three minor inf/nan issues in float.fromhex:
152 (1) inf and nan strings with trailing whitespace were incorrectly
153 rejected; (2) parsing of strings representing infinities and nans
154 was locale aware; and (3) the interpretation of fromhex('-nan')
155 didn't match that of float('-nan').
157 - Issue #5920: For float.__format__, change the behavior with the
158 empty presentation type (that is, not one of 'e', 'f', 'g', or 'n')
159 to be like 'g' but with at least one decimal point and with a
160 default precision of 12. Previously, the behavior the same but with
161 a default precision of 6. This more closely matches str(), and
162 reduces surprises when adding alignment flags to the empty
163 presentation type. This also affects the new complex.__format__ in
166 - Issue #5890: in subclasses of 'property' the __doc__ attribute was
167 shadowed by classtype's, even if it was None. property now
168 inserts the __doc__ into the subclass instance __dict__.
170 - Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
171 sequences. Patch by Nick Barnes and Victor Stinner.
173 - Issue #1588: Add complex.__format__. For example,
174 format(complex(1, 2./3), '.5') now produces a sensible result.
176 - Issue #5864: Fix empty format code formatting for floats so that it
177 never gives more than the requested number of significant digits.
179 - Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
180 new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.
182 - Issue #4971: Fix titlecase for characters that are their own
183 titlecase, but not their own uppercase.
185 - Issue #5835: Deprecate PyOS_ascii_formatd and replace it with
186 _PyOS_double_to_string or PyOS_double_to_string.
188 - Issue #5283: Setting __class__ in __del__ caused a segfault.
190 - Issue #5816: complex(repr(z)) now recovers z exactly, even when
191 z involves nans, infs or negative zeros.
193 - Implement PEP 378, Format Specifier for Thousands Separator, for
194 floats, ints, and longs.
196 - Issue #5515: 'n' formatting for ints, longs, and floats handles
197 leading zero formatting poorly.
199 - Issue #5772: For float.__format__, don't add a trailing ".0" if
200 we're using no type code and we have an exponent.
202 - Issue #3166: Make long -> float (and int -> float) conversions
205 - Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
208 - Issue #1869: fix a couple of minor round() issues. round(5e15+1)
209 was giving 5e15+2; round(-0.0) was losing the sign of the zero.
211 - Issue #5759: float() didn't call __float__ on str subclasses.
213 - Issue #5704: the "-3" command-line option now implies "-t".
215 - Issue #2170: refactored xml.dom.minidom.normalize, increasing both
216 its clarity and its speed.
218 - Issue #2396: the memoryview object was backported from Python 3.1.
220 - Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
221 when hitting the recursion limit under certain circumstances.
223 - Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.
225 - Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
226 the end sys.path, for compatibility with the system install of Python.
228 - Issue #4688: Add a heuristic so that tuples and dicts containing only
229 untrackable objects are not tracked by the garbage collector. This can
230 reduce the size of collections and therefore the garbage collection overhead
231 on long-running programs, depending on their particular use of datatypes.
233 - Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
234 improve its performance. Long divisions and remainder operations
235 are now between 50% and 150% faster.
237 - Issue #4258: Make it possible to use base 2**30 instead of base
238 2**15 for the internal representation of integers, for performance
239 reasons. Base 2**30 is enabled by default on 64-bit machines. Add
240 --enable-big-digits option to configure, which overrides the
241 default. Add sys.long_info structseq to provide information about
244 - Issue #4034: Fix weird attribute error messages of the traceback object. (As a
245 result traceback.__members__ no longer exists.)
247 - Issue #4474: PyUnicode_FromWideChar now converts characters outside
248 the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
249 and sizeof(Py_UNICODE) == 2.
251 - Issue #5237: Allow auto-numbered fields in str.format(). For
252 example: '{} {}'.format(1, 2) == '1 2'.
254 - Issue #3652: Make the 'line' argument for warnings.showwarning() a
255 requirement. Means the DeprecationWarning from Python 2.6 can go away.
257 - Issue #5247: Improve error message when unknown format codes are
258 used when using str.format() with str, unicode, long, int, and
261 - Running Python with the -3 option now also warns about classic division
264 - Issue #5260: Long integers now consume less memory: average
265 saving is 2 bytes per long on a 32-bit system and 6 bytes per long
268 - Issue #5186: Reduce hash collisions for objects with no __hash__ method by
269 rotating the object pointer by 4 bits to the right.
271 - Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
272 it now forces its argument to double before testing for infinity.
274 - Issue #4978: Passing keyword arguments as unicode strings is now allowed.
276 - Issue #1242657: the __len__() and __length_hint__() calls in several tools
277 were suppressing all exceptions. These include list(), filter(), map(),
278 zip(), and bytearray().
280 - os.ftruncate raises OSErrors instead of IOErrors for consistency with other os
283 - Issue #4991: Passing invalid file descriptors to io.FileIO now raises an
286 - Issue #4807: Port the _winreg module to Windows CE.
288 - Issue #4935: The overflow checking code in the expandtabs() method common
289 to str, bytes and bytearray could be optimized away by the compiler, letting
290 the interpreter segfault instead of raising an error.
292 - Issue #3720: Fix a crash when an iterator modifies its class and removes its
295 - Issue #4893: Use NT threading on CE.
297 - Issue #4915: Port sysmodule to Windows CE.
299 - Issue #4074: Change the criteria for doing a full garbage collection (i.e.
300 collecting the oldest generation) so that allocating lots of objects without
301 destroying them does not show quadratic performance. Based on a proposal by
303 http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
305 - Issue #4850: Change COUNT_ALLOCS variables to Py_ssize_t.
307 - Issue #1180193: When importing a module from a .pyc (or .pyo) file with
308 an existing .py counterpart, override the co_filename attributes of all
309 code objects if the original filename is obsolete (which can happen if the
310 file has been renamed, moved, or if it is accessed through different paths).
311 Patch by Ziga Seilnacht and Jean-Paul Calderone.
313 - Issue #4075: Use OutputDebugStringW in Py_FatalError.
315 - Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
316 file with `str' filename on Windows.
318 - Issue #3680: Reference cycles created through a dict, set or deque iterator
319 did not get collected.
321 - Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
322 where the tp_hash and tp_dict slots are both NULL.
324 - Issue #4764: With io.open, IOError.filename is set when trying to open a
325 directory on POSIX systems.
327 - Issue #4764: IOError.filename is set when trying to open a directory on POSIX
330 - Issue #4759: None is now allowed as the first argument of
331 bytearray.translate(). It was always allowed for bytes.translate().
333 - Added test case to ensure attempts to read from a file opened for writing
336 - Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
337 print elapsed times, not only when some objects are uncollectable /
338 unreachable. Original patch by Neil Schemenauer.
340 - Issue #3439: Add a bit_length method to int and long.
342 - Issue #2183: Simplify and optimize bytecode for list comprehensions.
343 Original patch by Neal Norwitz.
345 - Issue #4597: Fixed exception handling when the __exit__ function of a
346 context manager returns a value that cannot be converted to a bool.
348 - Issue #4597: Fixed several opcodes that weren't always propagating
351 - Issue #4445: Replace "sizeof(PyStringObject)" with
352 "offsetof(PyStringObject, ob_sval) + 1" when allocating memory for
353 str instances. On a typical machine this saves 3 bytes of memory
354 (on average) per string allocation.
356 - Issue #3996: On Windows, the PyOS_CheckStack function would cause the
357 interpreter to abort ("Fatal Python error: Could not reset the stack!")
358 instead of throwing a MemoryError.
360 - Issue #3689: The list reversed iterator now supports __length_hint__
361 instead of __len__. Behavior now matches other reversed iterators.
363 - Issue #4367: Python would segfault during compiling when the unicodedata
364 module couldn't be imported and \N escapes were present.
366 - Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
367 method on file objects with closefd=False. The file descriptor is still
368 kept open but the file object behaves like a closed file. The ``FileIO``
369 object also got a new readonly attribute ``closefd``.
371 - Issue #4348: Some bytearray methods returned that didn't cause any change to
372 the bytearray, returned the same bytearray instead of a copy.
374 - Issue #4317: Fixed a crash in the imageop.rgb2rgb8() function.
376 - Issue #4230: If ``__getattr__`` is a descriptor, it now functions correctly.
378 - Issue #4048: The parser module now correctly validates relative imports.
380 - Issue #4225: ``from __future__ import unicode_literals`` didn't work in an
383 - Issue #4176: Fixed a crash when pickling an object which ``__reduce__``
384 method does not return iterators for the 4th and 5th items.
386 - Issue #4209: Enabling unicode_literals and the print_function in the same
387 __future__ import didn't work.
389 - Using ``nonlocal`` as a variable name will now raise a Py3k SyntaxWarning
390 because it is a reserved word in 3.x.
392 - On windows, os.chdir given unicode was not working if GetCurrentDirectoryW
393 returned a path longer than MAX_PATH. (But It's doubtful this code path is
394 really executed because I cannot move to such directory on win2k)
396 - Issue #4069: When set.remove(element) is used with a set element, the element
397 is temporarily replaced with an equivalent frozenset. But the eventual
398 KeyError would always report the empty frozenset([]) as the missing key. Now
399 it correctly refers to the initial element.
401 - Issue #4509: Various issues surrounding resize of bytearray objects to
402 which there are buffer exports.
404 - Issue #4748: Lambda generators no longer return a value.
406 - Issue #3582: Use native TLS functions on Windows
408 - The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
410 - Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
413 - Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
414 to avoid compiler warnings.
416 - Issue #5705: os.setuid() would not accept values > 2**31-1 but pwd.getpwnam()
417 returned them on 64bit platforms.
419 - Issue #5108: Handle %s like %S and %R in PyUnicode_FromFormatV(): Call
420 PyUnicode_DecodeUTF8() once, remember the result and output it in a second
421 step. This avoids problems with counting UTF-8 bytes that ignores the effect
422 of using the replace error handler in PyUnicode_DecodeUTF8().
424 - Issue #3739: The unicode-internal encoder now reports the number of characters
425 consumed like any other encoder (instead of the number of bytes).
430 - Issue #4750: Store the basename of the original filename in the gzip FNAME
431 header as required by RFC 1952.
433 - Issue #1180: Added a new global option to ignore ~/.pydistutils.cfg in
436 - Issue #7218: Fix test_site for win32, the directory comparison was done with
439 - Issue #7205: Fix a possible deadlock when using a BZ2File object from
440 several threads at once.
442 - Issue #7071: byte-compilation in Distutils is now done with respect to
443 sys.dont_write_bytecode.
445 - Issue #7066: archive_util.make_archive now restores the cwd if an error is
446 raised. Initial patch by Ezio Melotti.
448 - Issue #6218: io.StringIO and io.BytesIO instances are now picklable with
451 - Issue #7077: logging: SysLogHandler now treats Unicode as per RFC 5424.
453 - Issue #7099: Decimal.is_normal now returns True for numbers with exponent
456 - Issue #5833: Fix extra space character in readline completion with the
457 GNU readline library version 6.0.
459 - Issue #7133: SSL objects now support the new buffer API.
461 - Issue #7149: urllib fails on OSX in the proxy detection code
463 - Issue #7069: Make inspect.isabstract() return a boolean.
465 - Add support to the `ihooks` module for relative imports.
467 - Issue #6894: Fixed the issue urllib2 doesn't respect "no_proxy" environment
469 - Issue #7086: Added TCP support to SysLogHandler, and tidied up some
470 anachronisms in the code which were a relic of 1.5.2 compatibility.
472 - Issue #7082: When falling back to the MIME 'name' parameter, the
473 correct place to look for it is the Content-Type header.
475 - Issue #7048: Force Decimal.logb to round its result when that result
476 is too large to fit in the current precision.
478 - Issue #6516: Added owner/group support when creating tar archives in
481 - Issue #7031: Add TestCase.assert(Not)IsInstance() methods.
483 - Issue #6790: Make it possible again to pass an `array.array` to
484 `httplib.HTTPConnection.send`. Patch by Kirk McDonald.
486 - Issue #6236, #6348: Fix various failures in the `io` module under AIX
487 and other platforms, when using a non-gcc compiler. Patch by egreen.
489 - Issue #6954: Fixed crash when using DISTUTILS_DEBUG flag in Distutils.
491 - Issue #6851: Fix urllib.urlopen crash on secondairy threads on OSX 10.6
493 - Issue #4606: Passing 'None' if ctypes argtype is set to POINTER(...)
494 does now always result in NULL.
496 - Issue #5042: ctypes Structure sub-subclass does now initialize
497 correctly with base class positional arguments.
499 - Issue #6938: Fix a TypeError in string formatting of a multiprocessing
502 - Issue #6635: Fix profiler printing usage message.
504 - Issue #6856: Add a filter keyword argument to TarFile.add().
506 - Issue #6163: Fixed HP-UX runtime library dir options in
507 distutils.unixcompiler. Initial patch by Sridhar Ratnakumar and
508 Michael Haubenwallner.
510 - Issue #6857: Default format() alignment should be '>' for Decimal
513 - Issue #6795: int(Decimal('nan')) now raises ValueError instead of
514 returning NaN or raising InvalidContext. Also, fix infinite recursion
515 in long(Decimal('nan')).
517 - Issue #6850: Fix bug in Decimal._parse_format_specifier for formats
518 with no type specifier.
520 - Issue #4937: plat-mac/bundlebuilder revers to non-existing version.plist
522 - Issue #6838: Use a list to accumulate the value instead of
523 repeatedly concatenating strings in httplib's
524 HTTPResponse._read_chunked providing a significant speed increase
525 when downloading large files servend with a Transfer-Encoding of 'chunked'.
527 - Issue #5275: In Cookie's Cookie.load(), properly handle non-string arguments
530 - Issue #2666: Handle BROWSER environment variable properly for unknown browser
531 names in the webbrowser module.
533 - Issue #6054: Do not normalize stored pathnames in tarfile.
535 - Issue #6794: Fix Decimal.compare_total and Decimal.compare_total_mag: NaN
536 payloads are now ordered by integer value rather than lexicographically.
538 - Issue #6693: New functions in site.py to get user/global site packages paths.
540 - The thread.lock type now supports weak references.
542 - Issue #1356969: Add missing info methods in Tix.HList.
544 - Issue #1522587: New constants and methods for the Tix.Grid widget.
546 - Issue #1250469: Fix the return value of Tix.PanedWindow.panes.
548 - Issue #1119673: Do not override Tkinter.Text methods when creating a
551 - Issue #6665: Fix fnmatch to properly match filenames with newlines in them.
553 - Issue #1135: Add the XView and YView mix-ins to avoid duplicating
554 the xview* and yview* methods.
556 - Issue #6629: Fix a data corruption issue in the new `io` package, which could
557 occur when writing to a BufferedRandom object (e.g. a file opened in "rb+" or
558 "wb+" mode) after having buffered a certain amount of data for reading. This
559 bug was not present in the pure Python implementation.
561 - Issue #4660: If a multiprocessing.JoinableQueue.put() was preempted, it was
562 possible to get a spurious 'task_done() called too many times' error.
564 - Issue #1628205: Socket file objects returned by socket.socket.makefile() now
565 properly handles EINTR within the read, readline, write & flush methods.
566 The socket.sendall() method now properly handles interrupted system calls.
568 - Issue #6595: The Decimal constructor now allows arbitrary Unicode
569 decimal digits in input, as recommended by the standard. Previously
570 it was restricted to accepting [0-9].
572 - Issue #6511: ZipFile now raises BadZipfile (instead of an IOError) when
573 opening an empty or very small file.
575 - Issue #6553: Fixed a crash in cPickle.load(), when given a file-like object
576 containing incomplete data.
578 - Issue #6545: Removed assert statements in distutils.Extension, so the
579 behavior is similar when used with -O.
581 - unittest has been split up into a package. All old names should still work.
583 - Issue #6431: Make Fraction type return NotImplemented when it doesn't
584 know how to handle a comparison without loss of precision. Also add
585 correct handling of infinities and nans for comparisons with float.
587 - Issue #6415: Fixed warnings.warn segfault on bad formatted string.
589 - Issue #6466: now distutils.cygwinccompiler and distutils.emxccompiler
590 uses the same refactored function to get gcc/ld/dllwrap versions numbers.
591 It's `distutils.util.get_compiler_versions`. Added deprecation warnings
592 for the obsolete get_versions() functions.
594 - Issue #6433: fixed issues with multiprocessing.pool.map hanging on empty list
596 - Issue #6314: logging: Extra checks on the "level" argument in more places.
598 - Issue #2622: Fixed an ImportError when importing email.messsage from a
599 standalone application built with py2exe or py2app.
601 - Issue #6455: Fixed test_build_ext under win32.
603 - Issue #6377: Enabled the compiler option, and deprecate its usage as an
606 - Issue #6413: Fixed the log level in distutils.dist for announce.
608 - Issue #3392: The subprocess communicate() method no longer fails in select()
609 when file descriptors are large; communicate() now uses poll() when possible.
611 - Issue #6403: Fixed package path usage in build_ext.
613 - Issues #5155, 5313, 5331: multiprocessing.Process._bootstrap was
614 unconditionally calling "os.close(sys.stdin.fileno())" resulting in file
617 - Issue #6365: Distutils build_ext inplace mode was copying the compiled
618 extension in a subdirectory if the extension name had dots.
620 - Issue #6344: Fixed a crash of mmap.read() when passed a negative argument.
622 - Issue #5230: pydoc would report no documentation found if a module generated
623 a 'not found' import error when loaded; it now reports the import errors.
624 Thanks to Lucas Prado Melo for initial fix and collaboration on the tests.
626 - Issue #6314: logging.basicConfig() performs extra checks on the "level"
629 - Issue #6164: Added an AIX specific linker argument in Distutils
630 unixcompiler. Original patch by Sridhar Ratnakumar.
632 - Issue #6274: Fixed possible file descriptors leak in subprocess.py
634 - Issue #6189: Restored compatibility of subprocess.py with Python 2.2.
636 - Issue #6287: Added the license field in Distutils documentation.
638 - Issue #6286: Now Distutils upload command is based on urllib2 instead of
639 httplib, allowing the usage of http_proxy.
641 - Issue #6271: mmap tried to close invalid file handle (-1) when annonymous.
644 - Issue #6215: All bug fixes and enhancements from the Python 3.1 io library
645 (including the fast C implementation) have been backported to the standard
648 - Issue #6258: Support AMD64 in bdist_msi.
650 - Issue #5262: Fixed bug in next rollover time computation in
651 TimedRotatingFileHandler.
653 - Issue #6263: Fixed syntax error in distutils.cygwincompiler.
655 - Issue #5201: distutils.sysconfig.parse_makefile() now understands `$$`
656 in Makefiles. This prevents compile errors when using syntax like:
657 `LDFLAGS='-rpath=\$$LIB:/some/other/path'`. Patch by Floris Bruynooghe.
659 - Issue #5767: Removed sgmlop support from xmlrpclib.
661 - Issue #6131: test_modulefinder leaked when run after test_distutils.
662 Patch by Hirokazu Yamamoto.
664 - Issue #6048: Now Distutils uses the tarfile module in archive_util.
666 - Issue #5150: IDLE's format menu now has an option to strip trailing
669 - Issue #6121: pydoc now ignores leading and trailing spaces in the
670 argument to the 'help' function.
672 - In unittest, using a skipping decorator on a class is now equivalent to
673 skipping every test on the class. The ClassTestSuite class has been removed.
675 - Issue #6050: Don't fail extracting a directory from a zipfile if
676 the directory already exists.
678 - Issue #5311: bdist_msi can now build packages that do not depend on a
679 specific Python version.
681 - Issue #1309352: fcntl now converts its third arguments to a C `long` rather
682 than an int, which makes some operations possible under 64-bit Linux (e.g.
683 DN_MULTISHOT with F_NOTIFY).
685 - Issue #1424152: Fix for httplib, urllib2 to support SSL while working through
686 proxy. Original patch by Christopher Li, changes made by Senthil Kumaran.
688 - Issue #1983: Fix functions taking or returning a process identifier to use
689 the dedicated C type ``pid_t`` instead of a C ``int``. Some platforms have
690 a process identifier type wider than the standard C integer type.
692 - Issue #4066: smtplib.SMTP_SSL._get_socket now correctly returns the socket.
693 Patch by Farhan Ahmad, test by Marcin Bachry.
695 - Issue #6062: In distutils, fixed the package option of build_ext. Feedback
696 and tests on pywin32 by Tim Golden.
698 - Issue #6053: Fixed distutils tests on win32. patch by Hirokazu Yamamoto.
700 - Issue #6046: Fixed the library extension when distutils build_ext is used
701 inplace. Initial patch by Roumen Petrov.
703 - Issue #6041: Now distutils `sdist` and `register` commands use `check` as a
706 - Issue #2116: Weak references and weak dictionaries now support copy()ing and
709 - Issue #1655: Make imaplib IPv6-capable. Patch by Derek Morr.
711 - Issue #5918: Fix a crash in the parser module.
713 - Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.
715 - Issue #6022: a test file was created in the current working directory by
716 test_get_outputs in Distutils.
718 - Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
719 file is a binary. Patch by Brodie Rao, tests by Daniel Diniz.
721 - Issue #5977: distutils build_ext.get_outputs was not taking into account the
722 inplace option. Initial patch by kxroberto.
724 - Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
725 for old-style extensions.
727 - Issue #5971: StreamHandler.handleError now swallows IOErrors which occur when
728 trying to print a traceback.
730 - Issue #5976: Fixed Distutils test_check_environ.
732 - Issue #5900: Ensure RUNPATH is added to extension modules with RPATH if GNU
733 ld is used. Original patch by Floris Bruynooghe.
735 - Issue #5941: Distutils build_clib command was not working anymore because
736 of an incomplete costumization of the archiver command. Added ARFLAGS in the
737 Makefile besides AR and make Distutils use it. Original patch by David
740 - Issue 5955: aifc's close method did not close the file it wrapped,
741 now it does. This also means getfp method now returns the real fp.
743 - Issue #4875: On win32, ctypes.util.find_library does no longer
746 - Issue #5142: Add the ability to skip modules while stepping to pdb.
748 - Issue #1309567: Fix linecache behavior of stripping subdirectories when
749 looking for files given by a relative filename.
751 - Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
752 extracting a file to the root directory.
754 - Issue #5913: os.listdir() should fail for empty path on windows.
756 - Issue #5084: unpickling now interns the attribute names of pickled objects,
757 saving memory and avoiding growth in size of subsequent pickles. Proposal
758 and original patch by Jake McGuire.
760 - Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
761 error when a named pipe is encountered, rather than blocking infinitely.
763 - Issue #3959: The ipaddr module has been added to the standard library.
764 Contributed by Google.
766 - Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.
768 - Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
771 - Issue #4305: ctypes should now build again on mipsel-linux-gnu
773 - Issue #1734234: Massively speedup ``unicodedata.normalize()`` when the
774 string is already in normalized form, by performing a quick check beforehand.
775 Original patch by Rauli Ruohonen.
777 - Issue #5853: calling a function of the mimetypes module from several threads
778 at once could hit the recursion limit if the mimetypes database hadn't been
781 - Issue #5854: Updated __all__ to include some missing names and remove some
782 names which should not be exported.
784 - Issue #5810: Fixed Distutils test_build_scripts so it uses
785 sysconfig.get_config_vars.
787 - Issue #4951: Fixed failure in test_httpservers.
789 - Issue #3102: All global symbols that the _ctypes extension defines
790 are now prefixed with 'Py' or '_ctypes'.
792 - Issue #5041: ctypes does now allow pickling wide character.
794 - Issue #5812: For the two-argument form of the Fraction constructor,
795 Fraction(m, n), m and n are permitted to be arbitrary Rational
798 - Issue #5812: Fraction('1e6') is valid: more generally, any string
799 that's valid for float() is now valid for Fraction(), with the
800 exception of strings representing NaNs and infinities.
802 - Issue #5795: Fixed test_distutils failure on Debian ppc.
804 - Issue #5768: Fixed bug in Unicode output logic and test case for same.
806 - Issue #1161031: fix readwrite select flag handling: POLLPRI now
807 results in a handle_expt_event call, not handle_read_event, and POLLERR
808 and POLLNVAL now call handle_close, not handle_expt_event. Also,
809 dispatcher now has an 'ignore_log_types' attribute for suppressing
810 log messages, which is set to 'warning' by default.
812 - Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.
814 - Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
815 a value in SafeConfigParser.
817 - Issue #5732: added a new command in Distutils: check.
819 - Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
820 platforms. Initial patch by Paul Moore.
822 - Issue #2254: Fix CGIHTTPServer information disclosure. Relative paths are
823 now collapsed within the url properly before looking in cgi_directories.
825 - Issue #5095: Added bdist_msi to the list of bdist supported formats.
826 Initial fix by Steven Bethard.
828 - Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
829 Initial fix by Wayne Davison.
831 - Issue #5693: TestSuite.__iter__ can now be consistently overridden in subclasses.
833 - Issue #5694: removed spurious test output in Distutils (test_clean).
835 - Issue #5471: Fix os.path.expanduser() for $HOME set to '/'.
837 - Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
839 - Issue #1726172: fix IndexError in the case of and empty response in ftplib.
841 - Issue #2625: added missing iteritems() call to the for loop in
842 mailbox.MH.get_message().
844 - Issue #5585: Add the ability to call an initializer to mulitiprocessing.manager
845 so that users can install custom handlers/etc.
847 - Issue #3551: Patch multiprocessing to raise a proper exception if the size of the
848 object when writefile is called causes a ERROR_NO_SYSTEM_RESOURCES. Added docs
849 to note the limitation
851 - unittest.assertNotEqual() now uses the inequality operator (!=) instead
852 of the equality operator.
854 - Issue #6001: Test discovery for unittest. Implemented in
855 unittest.TestLoader.discover and from the command line.
857 - Issue #5679: The methods unittest.TestCase.addCleanup and doCleanups were added.
858 addCleanup allows you to add cleanup functions that will be called
859 unconditionally (after setUp if setUp fails, otherwise after tearDown). This
860 allows for much simpler resource allocation and deallocation during tests.
862 - Issue #3379: unittest.main now takes an optional exit argument. If False main
863 doesn't call sys.exit allowing it to be used from the interactive interpreter.
865 - Issue #5995: unittest.main now takes an optional verbosity argument allowing
866 test modules to be run with a higher than default verbosity.
868 - Issue #5995: A fix to allow you to run "python -m unittest test_module" or
869 "python -m unittest test_module.TestClass" from the command line.
871 - Issue #5728: unittest.TestResult has new startTestRun and stopTestRun methods;
872 called immediately before and after a test run.
874 - Issue #5663: better failure messages for unittest asserts. Default assertTrue
875 and assertFalse messages are now useful. TestCase has a longMessage attribute.
876 This defaults to False, but if set to True useful error messages are shown in
877 addition to explicit messages passed to assert methods.
879 - Issue #3110: Add additional protect around SEM_VALUE_MAX for multiprocessing
881 - In Pdb, prevent the reassignment of __builtin__._ by sys.displayhook on
884 - Issue #4572: added SEEK_* symbolic constants to io module.
886 - Issue #1665206 (partially): Move imports in cgitb to the top of the module
887 instead of performing them in functions. Helps prevent import deadlocking in
890 - Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.
892 - Actually make the SimpleXMLRPCServer CGI handler work.
894 - Issue #2522: locale.format now checks its first argument to ensure it has
895 been passed only one pattern, avoiding mysterious errors where it appeared
896 that it was failing to do localization.
898 - Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
901 - Issue #5619: Multiprocessing children disobey the debug flag and causes
902 popups on windows buildbots. Patch applied to work around this issue.
904 - Issue #5632: Thread.ident was None for the main thread and threads not created
905 with the threading module.
907 - Issue #5400: Added patch for multiprocessing on netbsd compilation/support
909 - Issue #5387: Fixed mmap.move crash by integer overflow.
911 - Issue #5261: Patch multiprocessing's semaphore.c to support context
912 manager use: "with multiprocessing.Lock()" works now.
914 - Issue #5177: Multiprocessing's SocketListener class now uses
915 socket.SO_REUSEADDR on all connections so that the user no longer needs
916 to wait 120 seconds for the socket to expire.
918 - Adjusted _tkinter to compile without warnings when WITH_THREAD is not
919 defined (part of issue #5035).
921 - Issue #5561: Removed the sys.version_info shortcuts from platform's
922 python_version() and python_version_tuple() since they produced different
923 output compared to previous Python versions.
925 - Issue #1034053: unittest now supports skipping tests and expected failures.
927 - The unittest.TestCase.assertRaises() method now returns a context manager when
928 not given a callable so that code to be tested can be written inline using
931 - The unittest.TestCase.assertEqual() now displays the differences in lists,
932 tuples, dicts and sets on failure. Many new handy type and comparison
933 specific assert* methods have been added that fail with error messages
934 actually useful for debugging. Contributed in part by Google. [Issue #2578]
936 - Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
937 forever on incomplete input. That caused tarfile.open() to hang when used
938 with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
939 partial bzip2 compressed data.
941 - Issue #5536: urllib.urlretrieve makes sure to close the file it's writing to
942 even if an exception occurs.
944 - Issue #5381: Added object_pairs_hook to the json module. This allows
945 OrderedDicts to be built by the decoder.
947 - Issue #2110: Add support for thousands separator and 'n' type
948 specifier to Decimal.__format__
950 - Fix Decimal.__format__ bug that swapped the meanings of the '<' and
951 '>' alignment characters.
953 - Issue #1222: locale.format() bug when the thousands separator is a space
956 - Issue #5472: Fixed distutils.test_util tear down. Original patch by
959 - collections.deque() objects now have a read-only attribute called maxlen.
961 - Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
962 it is has been populated and properly configured in order to prevent
965 - Issue #4792: Prevent a segfault in _tkinter by using the
966 guaranteed to be safe interp argument given to the PythonCmd in place of
967 the Tcl interpreter taken from a PythonCmd_ClientData.
969 - Issue #5193: Guarantee that Tkinter.Text.search returns a string.
971 - Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
972 Original patch by Akira Kitada.
974 - Issue #5385: Fixed mmap crash after resize failure on windows.
976 - Issue #5179: Fixed subprocess handle leak on failure on windows.
978 - PEP 372: Added collections.OrderedDict().
980 - The _asdict() for method for namedtuples now returns an OrderedDict().
982 - The configparser module now defaults to using an ordered dictionary.
984 - Issue #4308: httplib.IncompleteRead's repr doesn't include all of the data all
987 - Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
988 import guess_extension`` was used.
990 - Issue #1733986: Fixed mmap crash in accessing elements of second map object
991 with same tagname but larger size than first map. (Windows)
993 - Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
996 - Issue #1533164: Installed but not listed *.pyo was breaking Distutils
999 - Issue #5378: added --quiet option to Distutils bdist_rpm command.
1001 - Issue #5052: make Distutils compatible with 2.3 again.
1003 - Deprecated methods of symtable.Symbol have been removed: is_keywordarg(),
1004 is_vararg(), and is_in_tuple().
1006 - Issue #5316: Fixed buildbot failures introduced by multiple inheritance
1009 - Issue #5287: Add exception handling around findCaller() call to help out
1012 - Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
1013 The file was resized to wrong size.
1015 - Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
1017 - Issue #2279: distutils.sdist.add_defaults now add files
1018 from the package_data and the data_files metadata.
1020 - Issue #5257: refactored all tests in distutils, so they use
1021 support.TempdirManager, to avoid writing in the tests directory.
1023 - Issue #4524: distutils build_script command failed with --with-suffix=3.
1024 Initial patch by Amaury Forgeot d'Arc.
1026 - Issue #2461: added tests for distutils.util
1028 - Issue #1008086: Fixed socket.inet_aton() to always return 4 bytes even on
1029 LP64 platforms (most 64-bit Linux, bsd, unix systems).
1031 - Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
1032 function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
1034 - Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
1035 under NT and OS2. Patch by Philip Jenvey.
1037 - Issue #5128: Make compileall properly inspect bytecode to determine if needs
1038 to be recreated. This avoids a timing hole thanks to the old reliance on the
1039 ctime of the files involved.
1041 - Issue #5122: Synchronize tk load failure check to prevent a potential
1044 - Issue #1818: collections.namedtuple() now supports a keyword argument
1045 'rename' which lets invalid fieldnames be automatically converted to
1046 positional names in the form, _1, _2, ...
1048 - Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
1050 - Issue #5170: Fixed Unicode output bug in logging and added test case.
1051 This is a regression which did not occur in 2.5.
1053 - Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
1054 public documented method ``ZipImporter.get_filename()``.
1056 - Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
1057 the execution of packages by looking for and executing a ``__main__``
1058 submodule when a package name is supplied. Initial patch by Andi
1061 - Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
1062 not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
1063 Tkapp_Call when calling from a thread different than the one that created
1064 the Tcl interpreter. Patch by Robert Hancock.
1066 - Issue #1520877: Now distutils.sysconfig reads $AR from the
1067 environment/Makefile. Patch by Douglas Greiman.
1069 - Issue #4285: Change sys.version_info to be a named tuple. Patch by
1072 - Issue #1276768: The verbose option was not used in the code of
1073 distutils.file_util and distutils.dir_util.
1075 - Issue #5132: Fixed trouble building extensions under Solaris with
1076 --enabled-shared activated. Initial patch by Dave Peterson.
1078 - Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
1080 - Issue #2047: shutil.move() could believe that its destination path was
1081 inside its source path if it began with the same letters (e.g. "src" vs.
1084 - Issue #4920: Fixed .next() vs .__next__() issues in the ABCs for
1085 Iterator and MutableSet.
1087 - Added the ttk module. See issue #2983: Ttk support for Tkinter.
1089 - Issue #5021: doctest.testfile() did not create __name__ and
1090 collections.namedtuple() relied on __name__ being defined.
1092 - Backport importlib from Python 3.1. Only the import_module() function has
1093 been backported to help facilitate transitions from 2.7 to 3.1.
1095 - Issue #1885: distutils. When running sdist with --formats=tar,gztar
1096 the tar file was overriden by the gztar one.
1098 - Issue #4863: distutils.mwerkscompiler has been removed.
1100 - Added a new itertools functions: combinations_with_replacement()
1103 - Issue #5032: added a step argument to itertools.count() and
1104 allowed non-integer arguments.
1106 - Fix and properly document the multiprocessing module's logging
1107 support, expose the internal levels and provide proper usage
1110 - Issue #1672332: fix unpickling of subnormal floats, which was
1111 producing a ValueError on some platforms.
1113 - Issue #3881: Help Tcl to load even when started through the
1114 unreadable local symlink to "Program Files" on Vista.
1116 - Issue #4710: Extract directories properly in the zipfile module;
1117 allow adding directories to a zipfile.
1119 - Issue #3807: _multiprocessing build fails when configure is passed
1120 --without-threads argument. When this occurs, _multiprocessing will
1121 be disabled, and not compiled.
1123 - Issue #5008: When a file is opened in append mode with the new IO library,
1124 do an explicit seek to the end of file (so that e.g. tell() returns the
1125 file size rather than 0). This is consistent with the behaviour of the
1126 traditional 2.x file object.
1128 - Issue #5013: Fixed a bug in FileHandler which occurred when the delay
1131 - Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
1132 which inherited from numbers.py which did not have __slots__ defined. The
1133 numbers hierarchy now has its own __slots__ declarations.
1135 - Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
1136 for *nix machines for negative handles and large int handles. Without this check
1137 it is possible to segfault the interpreter.
1139 - Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
1142 - Issue #1225107: inspect.isclass() returned True for instances with a custom
1145 - Issue #3997: zipfiles generated with more than 65536 files could not be
1146 opened with other applications.
1148 - Issue #1162154: inspect.getmembers() now skips attributes that raise
1149 AttributeError, e.g. a __slots__ attribute which has not been set.
1151 - Issue #1696199: Add collections.Counter() for rapid and convenient
1154 - Issue #3860: GzipFile and BZ2File now support the context manager protocol.
1156 - Issue #4272: Add an optional argument to the GzipFile constructor to override
1157 the timestamp in the gzip stream. The default value remains the current time.
1158 The information can be used by e.g. gunzip when decompressing. Patch by
1161 - Restore Python 2.3 compatibility for decimal.py.
1163 - Issue #1702551: distutils sdist was not excluding VCS directories under
1164 Windows. Inital solution by Guy Dalberto.
1166 - The _tkinter module functions "createfilehandler", "deletefilehandler",
1167 "createtimerhandler", "mainloop", "dooneevent" and "quit" have been
1168 deprecated for removal in 3.x
1170 - Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
1171 to the decimal module.
1173 - Issue #4812: add missing underscore prefix to some internal-use-only
1174 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
1176 - Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
1177 the function is not a generator.
1179 - Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
1180 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
1182 - Issue #4646: distutils was choking on empty options arg in the setup
1183 function. Original patch by Thomas Heller.
1185 - Fractions.from_float() no longer loses precision for integers too big to
1188 - Issue #4790: The nsmallest() and nlargest() functions in the heapq module
1189 did unnecessary work in the common case where no key function was specified.
1191 - Issue #3767: Convert Tk object to string in tkColorChooser.
1193 - Issue #3248: Allow placing ScrolledText in a PanedWindow.
1195 - Issue #4444: Allow assertRaises() to be used as a context handler, so that
1196 the code under test can be written inline if more practical.
1198 - Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
1199 works as expected in the interactive environment.
1201 - Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
1204 - Issue #4400: .pypirc default generated file was broken in distutils.
1206 - Issue #4736: io.BufferedRWPair's closed property now functions properly.
1208 - Issue #3954: Fix a potential SystemError in _hotshot.logreader error
1211 - Issue #4574: fix a crash in io.IncrementalNewlineDecoder when a carriage
1212 return encodes to more than one byte in the source encoding (e.g. UTF-16)
1213 and gets split on a chunk boundary.
1215 - Issue #4223: inspect.getsource() will now correctly display source code
1216 for packages loaded via zipimport (or any other conformant PEP 302
1217 loader). Original patch by Alexander Belopolsky.
1219 - Issue #4201: pdb can now access and display source code loaded via
1220 zipimport (or any other conformant PEP 302 loader). Original patch by
1221 Alexander Belopolsky.
1223 - Issue #4197: doctests in modules loaded via zipimport (or any other PEP
1224 302 conformant loader) will now work correctly in most cases (they
1225 are still subject to the constraints that exist for all code running
1226 from inside a module loaded via a PEP 302 loader and attempting to
1227 perform IO operations based on __file__). Original patch by
1228 Alexander Belopolsky.
1230 - Issues #4082 and #4512: Add runpy support to zipimport in a manner that
1231 allows backporting to maintenance branches. Original patch by
1232 Alexander Belopolsky.
1234 - Issue #4163: Use unicode-friendly word splitting in the textwrap functions
1235 when given an unicode string.
1237 - Issue #4616: TarFile.utime(): Restore directory times on Windows.
1239 - Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
1240 give correct results in the case where one argument is a quiet NaN
1241 and the other is a finite number that requires rounding.
1243 - Issue #1030250: Distutils created directories even when run with the
1246 - Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
1249 - Issue #4529: fix the parser module's validation of try-except-finally
1252 - Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
1253 not a malformed option.
1255 - Added the subprocess.check_output() convenience function to get output
1256 from a subprocess on success or raise an exception on error.
1258 - Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
1259 support unusual filenames (such as those containing semi-colons) in
1260 Content-Disposition headers.
1262 - Issue #4384: Added logging integration with warnings module using
1263 captureWarnings(). This change includes a NullHandler which does nothing;
1264 it will be of use to library developers who want to avoid the "No handlers
1265 could be found for logger XXX" message which can appear if the library user
1266 doesn't configure logging.
1268 - Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
1271 - Issue #4363: The uuid.uuid1() and uuid.uuid4() functions now work even if
1272 the ctypes module is not present.
1274 - FileIO's mode attribute now always includes ``"b"``.
1276 - Issue #4116: Resolve member name conflict in ScrolledCanvas.__init__.
1278 - httplib.HTTPConnection.putheader() now accepts an arbitrary number of values
1279 for any header, matching what the documentation has claimed for a while.
1281 - Issue #3774: Fixed an error when create a Tkinter menu item without command
1284 - Fixed a modulefinder crash on certain relative imports.
1286 - Issue #4150: Pdb's "up" command now works for generator frames in post-mortem
1289 - Issue #4092: Return ArgInfo as promised in the documentation from
1290 inspect.getargvalues.
1292 - Issue #3935: Properly support list subclasses in bisect's C implementation.
1294 - Issue #4014: Don't claim that Python has an Alpha release status, in addition
1295 to claiming it is Mature.
1297 - Issue #4730: Fixed the cPickle module to handle correctly astral characters
1298 when protocol 0 is used.
1300 - Issue #1594: MacOS.GetCreatorAndType now always returns a big-endian result,
1301 to be consistent with Apple tools.
1303 - Issue #900949: plat-mac/videoreader.py no longer relies on a non-existing
1306 - Issue #16278952: plat-mac/videoreader.py now correctly imports MediaDescr
1308 - Issue #1737832 : plat-mac/EasyDialog.py no longer uses the broken aepack
1311 - Issue #1149804: macostools.mkdirs now even works when another process
1312 creates one of the needed subdirectories.
1314 - Issue #900506: added --no-zipimport flag to the bundlebuilder script
1316 - Issue #841800: bundlebuilder now works with 'python -O'
1318 - Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
1319 biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
1321 - Issue #5104: The socket module now raises OverflowError when 16-bit port and
1322 protocol numbers are supplied outside the allowed 0-65536 range on bind()
1323 and getservbyport().
1325 - Issue #999042: The Python compiler now handles explict global statements
1326 correctly (should be assigned using STORE_GLOBAL opcode).
1328 - Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
1329 new arguments introduced in 2.5.
1331 - Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
1332 makeunicodedata.py and regenerated the Unicode database (This fixes
1333 u'\u1d79'.lower() == '\x00').
1335 - Windows locale mapping updated to Vista.
1340 - Ttk demos added in Demo/tkinter/ttk/
1342 - Issue #4677: add two list comprehension tests to pybench.
1347 - Add 2 new options to ``--with-universal-archs`` on MacOSX:
1348 ``intel`` builds a distribution with ``i386`` and ``x86_64`` architectures,
1349 while ``3-way`` builds a distribution with the ``ppc``, ``i386``
1350 and ``x86_64`` architectures.
1352 - Issue #6802: Fix build issues on MacOSX 10.6
1354 - Issue #6244: Allow detect_tkinter to look for Tcl/Tk 8.6.
1356 - Issue 5390: Add uninstall icon independent of whether file
1357 extensions are installed.
1359 - Issue 5809: Specifying both --enable-framework and --enable-shared is
1360 an error. Configure now explicity tells you about this.
1362 - Issue #3585: Add pkg-config support. It creates a python-2.7.pc file
1363 and a python.pc symlink in the $(LIBDIR)/pkgconfig directory. Patch by
1366 - Issue #6094: Build correctly with Subversion 1.7.
1368 - Issue #5847: Remove -n switch on "Edit with IDLE" menu item.
1370 - Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
1371 linker, rather than always exit successfully. Patch by Floris Bruynooghe.
1373 - Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
1374 the order that backends for the dbm extension are checked.
1376 - Link the shared python library with $(MODLIBS).
1378 - Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
1380 - Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
1382 - Issue #4895: Use _strdup on Windows CE.
1384 - Issue #4472: "configure --enable-shared" now works on OSX
1386 - Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
1388 - Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
1390 - Issue #4289: Remove Cancel button from AdvancedDlg.
1392 - Issue #1656675: Register a drop handler for .py* files on Windows.
1394 - Issue #4120: Exclude manifest from extension modules in VS2008.
1396 - Issue #4091: Install pythonxy.dll in system32 again.
1398 - Issue #4018: Disable "for me" installations on Vista.
1400 - Issue #3758: Add ``patchcheck`` build target to .PHONY.
1402 - Issue #4204: Fixed module build errors on FreeBSD 4.
1407 - Issue #6556: Fixed the Distutils configuration files location explanation
1410 - Issue #6801 : symmetric_difference_update also accepts |.
1411 Thanks to Carl Chenet.
1416 - Issue #6624: PyArg_ParseTuple with "s" format when parsing argument with
1417 NULL: Bogus TypeError detail string.
1419 - Issue #5954: Add a PyFrame_GetLineNumber() function to replace most uses of
1422 - Issue #5959: Add a PyCode_NewEmpty() function to create a new empty code
1423 object at a specified file, function, and line number.
1425 - Issue #1419652: Change the first argument to PyImport_AppendInittab() to
1426 ``const char *`` as the string is stored beyond the call.
1428 - Some PyBytes_* aliases have been removed because they don't exist in 3.x.
1430 - Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
1431 for negative arguments. Previously, it raised TypeError.
1433 - Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
1435 - Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
1436 the GIL is released, or owned by another thread.
1438 - Issue #4122: On Windows, fix a compilation error when using the
1439 Py_UNICODE_ISSPACE macro in an extension module.
1441 - Issue #4293: Py_AddPendingCall is now thread safe and can be used for
1442 asynchronous notifications to python from any thread. Documentation added.
1447 - Issue #7078: Set struct.__doc__ from _struct.__doc__.
1449 - Issue #3366: Add gamma function to math module.
1451 - Issue #6823: Allow time.strftime() to accept a tuple with a isdst field
1452 outside of the range of [-1, 1] by normalizing the value to within that
1455 - Issue #6877: Make it possible to link the readline extension to libedit
1458 - Issue #6944: Fix a SystemError when socket.getnameinfo() was called
1459 with something other than a tuple as first argument.
1461 - Issue #6865: Fix reference counting issue in the initialization of the pwd
1464 - Issue #6848: Fix curses module build failure on OS X 10.6.
1466 - Fix a segfault in expat when given a specially crafted input lead to the
1467 tokenizer not stopping.
1469 - Issue #6561: '\d' in a regex now matches only characters with
1470 Unicode category 'Nd' (Number, Decimal Digit). Previously it also
1471 matched characters with category 'No'.
1473 - Issue #1523: Remove deprecated overflow wrapping for struct.pack
1474 with an integer format code ('bBhHiIlLqQ'). Packing an out-of-range
1475 integer now consistently raises struct.error.
1477 - Issues #1530559, #1741130: Fix various struct.pack inconsistencies
1478 for the integer formats ('bBhHiIlLqQ'). In the following, '*'
1479 represents any of '=', '<', '>'.
1481 - Packing a float now always gives a Deprecation Warning.
1482 Previously it only warned for 'I', 'L', '*B', '*H', '*I', '*L'.
1484 - If x is not an int, long or float, then packing x will always
1485 result in struct.error. Previously an x with an __int__ method
1486 could be packed by 'b', 'B', 'h', 'H', 'i', 'l', '*b', '*h'
1487 ,'*i', '*l', and an x with a __long__ method could be packed by
1488 'q', 'Q', '*q', '*Q'; for x with neither __int__ nor __long__,
1489 TypeError used to be raised (with a confusing error message) for
1490 'I', 'L', '*B', '*H', '*I', '*L', and struct.error in other cases.
1492 - Issue #4873: Fix resource leaks in error cases of pwd and grp.
1494 - Issue #4751: For hashlib algorithms provided by OpenSSL, the Python
1495 GIL is now released during computation on data lengths >= 2048 bytes.
1497 - Issue #3745: Fix hashlib to always reject unicode and non buffer-api
1498 supporting objects as input no matter how it was compiled (built in
1499 implementations or external openssl library).
1501 - Issue #4397: Fix occasional test_socket failure on OS X.
1503 - Issue #4279: Fix build of parsermodule under Cygwin.
1505 - Issue #4051: Prevent conflict of UNICODE macros in cPickle.
1507 - Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
1509 - Issue #1040026: Fix os.times result on systems where HZ is incorrect.
1511 - Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
1514 - Issue #4365: Add crtassem.h constants to the msvcrt module.
1516 - Issue #4396: The parser module now correctly validates the with statement.
1518 - Issue #5228: Make functools.partial objects can now be pickled.
1523 - Issue #7151: fixed regrtest -j so that output to stderr from a test no
1524 longer runs the risk of causing the worker thread to fail.
1526 - Issue #7055: test___all__ now greedily detects all modules which have an
1527 __all__ attribute, rather than using a hardcoded and incomplete list.
1529 - Issue #7058: Added save/restore for things like sys.argv and cwd to
1530 runtest_inner in regrtest, with warnings if the called test modifies them,
1531 and a new section in the summary report at the end.
1533 - Issue #7042: Fix test_signal (test_itimer_virtual) failure on OS X 10.6.
1535 - Issue #6806: test_platform failed under OS X 10.6.0 because ``sw_ver`` leaves
1536 off the trailing 0 in the version number.
1538 - Issue #5450: Moved tests involving loading tk from Lib/test/test_tcl to
1539 Lib/lib-tk/test/test_tkinter/test_loadtk. With this, these tests demonstrate
1540 the same behaviour as test_ttkguionly (and now also test_tk) which is to
1541 skip the tests if DISPLAY is defined but can't be used.
1543 - Issue #6152: New option '-j'/'--multiprocess' for regrtest allows running
1544 regression tests in parallel, shortening the total runtime.
1546 - Issue #5354: New test support function import_fresh_module() makes
1547 it easy to import both normal and optimised versions of modules.
1548 test_heapq and test_warnings have been adjusted to use it, tests for
1549 other modules with both C and Python implementations in the stdlib
1550 can be adjusted to use it over time.
1552 - Fix test_warnings to no longer reset the warnings filter.
1554 - Fix test_logging to no longer reset the warnings filter.
1556 - Issue #5635: Fix running test_sys with tracing enabled.
1558 - regrtest no longer treats ImportError as equivalent to SkipTest. Imports
1559 that should cause a test to be skipped are now done using import_module
1560 from test support, which does the conversion.
1562 - Issue #5083: New 'gui' resource for regrtest.
1564 - Issue #5837: Certain sequences of calls to set() and unset() for
1565 support.EnvironmentVarGuard objects restored the environment variables
1566 incorrectly on __exit__.
1568 - Issue #2389: Array objects are now pickled in a portable manner.
1571 What's New in Python 2.6 final
1572 ==============================
1574 *Release date: 01-Oct-2008*
1579 - Issue #3967: Fixed a crash in the count() and find() methods of string-like
1580 objects, when the "start" parameter is a huge value.
1582 - Issue #3965: Fixed a crash on Windows when open() is given an invalid
1583 filename or mode, and the filename is a unicode string.
1585 - Bug #3951: Py_USING_MEMORY_DEBUGGER should not be enabled by default.
1590 - Issue #3965: Allow repeated calls to turtle.Screen, by making it a
1591 true singleton object.
1593 - Issue #3895: It was possible to crash the interpreter when an external timer
1594 was used with cProfile that returned an object that could not be converted
1597 - Issue #3950: Made turtle respect scale factors.
1599 - Issue #3547: Fixed ctypes structures bitfields of varying integer
1602 - Issue #3879: A regression in urllib.getproxies_enviroment was fixed.
1604 - Issue #3863: Disabled a unit test of fork being called from a thread
1605 when running on platforms known to exhibit OS bugs when attempting that.
1610 - Bug #3989: Package the 2to3 script (as 2to3.py) in the Windows
1613 - Bug #3887: Package x64 version of CRT for AMD64 Windows binaries.
1616 What's New in Python 2.6 release candidate 2?
1617 =============================================
1619 *Release date: 17-Sep-2008*
1627 - Security Issue #2: imageop did not validate arguments correctly and could
1628 segfault as a result.
1630 - Issue #3886: Possible integer overflows in the _hashopenssl module were
1636 - Issue #3850: recursion tests in Tools/scripts/find_recursion_limit.py can raise
1637 AttributeError instead of RuntimeError, depending in which C API call
1638 exactly the recursion limit is exceeded. Consequently, both exception types
1639 are caught and silenced.
1644 - Issue #3617: Include a licensing statement regarding the Microsoft
1645 C runtime in the Windows installer.
1648 What's New in Python 2.6 release candidate 1?
1649 =============================================
1651 *Release date: 12-Sep-2008*
1656 - Issue #3642: Suppress warning in obmalloc when size_t is larger than uint.
1658 - Issue #3743: In a few places, PY_FORMAT_SIZE_T was incorrectly used with
1659 PyString_FromFormat or PyErr_Format to display size_t values. The macro
1660 PY_FORMAT_SIZE_T is designed to select the correct format for the OS
1661 ``printf`` function, whereas PyString_FromFormat has an independent
1662 implementation and uses "%zd" on all platforms for size_t values.
1663 This makes a difference on win64, where ``printf`` needs "%Id" to display
1666 - Issue #3634: _weakref.ref(Exception).__init__() gave invalid return value on
1669 - Issue #3777: long() applied to a float object now always return a long
1670 object; previously an int would be returned for small values. the __long__
1671 method is allowed to return either an int or a long, but the behaviour of
1672 float objects should not change to respect backward compatibility.
1674 - Issue #3751: str.rpartition would perform a left-partition when called with
1677 - Issue #3683: Fix compilation when --without-threads is given.
1679 - Issue #3668: Fix a memory leak with the "s*" argument parser in
1680 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
1681 was correctly parsed but parsing of subsequent arguments failed.
1683 - Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
1684 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
1685 mechanism. In the process, fix a bug where isinstance() and issubclass(),
1686 when given a tuple of classes as second argument, were looking up
1687 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
1690 - Fix crashes on memory allocation failure found with failmalloc.
1692 - Fix memory leaks found with valgrind and update suppressions file.
1694 - Fix compiler warnings in opt mode which would lead to invalid memory reads.
1696 - Fix problem using wrong name in decimal module reported by pychecker.
1698 - Silenced another compiler warning about a used but not defined
1699 function 'stringlib_contains_obj'.
1701 - Added warnings on the use of ``__getslice__``, ``__setslice__``, or
1704 - Issue #3678: Correctly pass LDFLAGS and LDLAST to the linker on shared
1705 library targets in the Makefile.
1707 - Issue #1204: The configure script now tests for additional libraries
1708 that may be required when linking against readline. This fixes issues
1709 with x86_64 builds on some platforms (a few Linux flavors and OpenBSD).
1714 - Aliased PyObject_Bytes to PyObject_Str.
1719 - Issue #3640: Pickling a list or a dict uses less local variables, to reduce
1720 stack usage in the case of deeply nested objects.
1722 - Issue #3629: Fix sre "bytecode" validator for an end case.
1724 - Issue #3811: The Unicode database was updated to 5.1.
1726 - Issue #3781: Further warnings.catch_warnings() cleanup to prevent
1727 silent misbehaviour when a single instance is nested in multiple
1728 with statements, or when the methods are invoked in the wrong order.
1730 - Issue #3809: Fixed spurious 'test.blah' file left behind by test_logging.
1732 - Issue #3781: Clean up the API for warnings.catch_warnings() by having it
1733 return a list or None rather than a custom object.
1735 - Issue #1638033: Cookie.Morsel gained the httponly attribute.
1737 - Issue #3535: zipfile couldn't read some zip files larger than 2GB.
1739 - Issue #3776: Deprecate the bsddb package for removal in 3.0.
1741 - Issue #3762: platform.architecture() fails if python is lanched via
1744 - Issue #3772: Fixed regression problem in StreamHandler.emit().
1746 - Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
1747 to the urlparse one. Added a PendingDeprecationWarning in the old
1748 module, it will be deprecated in the future.
1750 - Issue #2562: Fix distutils PKG-INFO writing logic to allow having
1751 non-ascii characters and Unicode in setup.py meta-data.
1753 - Issue #3726: Allow spaces in separators in logging configuration files.
1755 - Issue #3719: platform.architecture() fails if there are spaces in the
1756 path to the Python binary.
1758 - Issue 3602: Moved test.test_support.catch_warning() to
1759 warnings.catch_warnings() along with some API cleanup. Expanding the tests
1760 for catch_warnings() also led to an improvement in the raising of a
1761 DeprecationWarning related to warnings.warn_explicit().
1763 - The deprecation warnings for the old camelCase threading API were removed.
1765 - logging: fixed lack of use of encoding attribute specified on a stream.
1767 - Silenced a trivial compiler warning in the sqlite module.
1769 - Fixed two format strings in the _collections module.
1771 - Issue #3703: _fileio.FileIO gave unhelpful error message when trying to open a
1774 - Issue #3708: os.urandom no longer goes into an infinite loop when passed a
1775 non-integer floating point number.
1777 - Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
1783 - Issue #4301: Patch the logging module to add processName support, remove
1784 _check_logger_class from multiprocessing.
1786 - Issue #2975: When compiling several extension modules with Visual Studio 2008
1787 from the same python interpreter, some environment variables would grow
1790 - Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
1791 exploitation of poor argument checking.
1793 - sqlite3: Changed docstring of iterdump() to mark method as "Non-standard".
1795 - Issue #3103: Reduced globals symbols used by sqlite3 module and made sure all
1796 remaining ones have "pysqlite_" prefix.
1798 - Issue #3846: Release the GIL during sqlite3_prepare calls. This improves
1799 concurrent access to the same SQLite database from multiple
1805 - Issue #3781: Add test.test_support.check_warnings() as a convenience
1806 wrapper for warnings.catch_warnings() that makes it easier to check
1807 that expected warning messages are being reported.
1809 - Issue #3796: Some tests functions were not enabled in test_float.
1811 - Issue #3768: Move test_py3kwarn over to the new API for catch_warnings().
1816 - Issue #3833: Use a different upgrade code for Win64 installers.
1818 - Issue #2271: Set SecureCustomProperties so that installation will properly
1819 use the TARGETDIR even for unprivileged users.
1821 - Allow passing the MSI file name to merge.py.
1823 - Issue #3758: Rename the 'check' target to 'patchcheck' so as to not clash
1824 with GNU build target guidelines.
1827 What's New in Python 2.6 beta 3?
1828 ================================
1830 *Release date: 20-Aug-2008*
1835 - Issue #1878: Remove Py_TPFLAGS_HAVE_VERSION_TAG from
1836 Py_TPFLAGS_DEFAULT when not building the core. This means 3rd party
1837 extensions do not automatically benefit from the class attribute
1838 cache; they will have to explicitly add Py_TPFLAGS_HAVE_VERSION_TAG
1839 to their tp_flags field if they care. This is a backwards
1840 compatibility feature; in 3.0, all types will use the cache by
1843 - Keyword arguments can now follow starred arguments. (``f(a, *args,
1844 keyword=23)`` is now valid syntax.)
1846 - ctypes function pointers that are COM methods have a boolean True
1849 - Issue #3139: Make buffer-interface thread-safe wrt. PyArg_ParseTuple,
1850 by denying s# to parse objects that have a releasebuffer procedure,
1853 - Issue #3537: Fix an assertion failure when an empty but presized dict
1854 object was stored in the freelist.
1856 - Issue #1481296: Make long(float('nan')) and int(float('nan')) raise
1857 ValueError consistently across platforms.
1859 - Issue #3479: On platforms where sizeof(int) is smaller than sizeof(long)
1860 (64bit Unix, for example), unichr() would truncate its argument and return
1861 u'\x00' for unichr(2**32). Now it properly raises an OverflowError.
1863 - Apply security patches from Apple.
1865 - Issue #2542: Now that issubclass() may call arbitrary code, ensure that
1866 PyErr_ExceptionMatches returns 0 when an exception occurs there.
1868 - Issue #1819: function calls with several named parameters are now on
1869 average 35% faster (as measured by pybench).
1871 - Issue #2378: An unexpected UnboundLocalError or NameError could appear when
1872 the python debugger steps into a class statement: the free variables (local
1873 variables defined in an outer scope) would be deleted from the outer scope.
1875 - Issue #2620: Overflow checking when allocating or reallocating memory
1876 was not always being done properly in some python types and extension
1877 modules. PyMem_MALLOC, PyMem_REALLOC, PyMem_NEW and PyMem_RESIZE have
1878 all been updated to perform better checks and places in the code that
1879 would previously leak memory on the error path when such an allocation
1880 failed have been fixed.
1885 - Issue #3612: Added some missing basic types in ctypes.wintypes.
1887 - The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
1888 symtable.Symbol have been deprecated for removal in 3.0 and the next release.
1890 - Issue #2234: distutils failed for some versions of the cygwin compiler. The
1891 version reported by these tools does not necessarily follow the python
1892 version numbering scheme, so the module is less strict when parsing it.
1894 - Issue #2235: Added Py3k warnings for types which will become unhashable
1895 under the stricter __hash__ inheritance rules in 3.0. Several types
1896 which did not meet the rules for hash invariants and were already
1897 unhashable in 3.0 have now been explicitly flagged as unhashable in
1898 2.6 as well (collections.Mapping, collections.Set, unittest.TestSuite,
1899 xml.dom.minidom.NamedNodeMap, numbers.Number, UserList.UserList)
1901 - Update __all__ for cookielib, csv, os, urllib2, and weakref to include things
1902 imported into the module but exposed as part of the module's API.
1904 - Remove an unneeded import of abc.ABCMeta from 'inspect'.
1906 - Remove unneeded imports of 'sys' and 'warnings' from 'io'.
1908 - Remove unneeded imports of 'warnings' from shelve, filecmp, and dummy_thread.
1910 - Issue #3575: Incremental decoder's decode function now takes bytearray
1911 by using 's*' instead of 't#'.
1913 - Issue #2222: Fixed reference leak when occurred os.rename()
1914 fails unicode conversion on 2nd parameter. (windows only)
1916 - Issue 2464. urllib2 now supports a malformation in the URL received
1919 - Silence the DeprecationWarning raised when importing mimetools in
1920 BaseHTTPServer, cgi (and rfc822), httplib.
1922 - Issue #2776: fixed small issue when handling an URL with double slash
1923 after a 302 response in the case of not going through a proxy.
1925 - Issue #2676: in the email package, content-type parsing was hanging on
1926 pathological input because of quadratic or exponential behaviour of a
1929 - Issue #3476: binary buffered reading through the new "io" library is now
1932 - Silence the DeprecationWarning of rfc822 when it is imported by mimetools
1933 since mimetools itself is deprecated. Because modules are cached, all
1934 subsequent imports of rfc822 will not raise a visible DeprecationWarning.
1936 - Issue #3134: shutil referenced undefined WindowsError symbol.
1938 - Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
1939 menu entries were not deleted.
1941 - Copied the implementation of reduce() to _functools.reduce() to have a
1942 version that did not raise a DeprecationWarning under -3.
1944 - Issue #3205: When iterating over a BZ2File fails allocating memory, raise
1945 a MemoryError rather than silently stop the iteration.
1947 - Issue #3487: sre "bytecode" validator. Passing invalid "re-bytecode"
1948 to _sre.compile() will now be rejected. This should not affect anybody
1949 since the re.compile() function never generates invalid re-bytecode.
1951 - Issue #3436: Make csv.DictReader's fieldnames attribute a property so that
1952 upon first access it can be automatically initialized from the csv file if
1953 it wasn't initialized during instantiation.
1955 - Issue #2338: Create imp.reload() to help with transitioning to Python 3.0 as
1956 the reload() built-in has been removed.
1958 - Changed code in the following modules/packages to remove warnings raised
1959 while running under the ``-3`` flag: aifc, asynchat, asyncore, bdb, bsddb,
1960 ConfigParser, cookielib, csv, difflib, distutils, DocXMLRPCServer, email,
1961 filecmp, fileinput, inspect, logging, modulefinder, pdb, pickle, profile,
1962 pstats, pydoc, re, rlcompleter, SimpleXMLRPCServer, shelve, socket,
1963 subprocess, sqlite3, tarfile, Tkinter, test.test_support, textwrap,
1964 threading, tokenize, traceback, urlparse, wsgiref, xml, xmlrpclib.
1966 - Issue #3039: Fix tarfile.TarFileCompat.writestr() which always
1967 raised an AttributeError.
1969 - Issue #2523: Fix quadratic behaviour when read()ing a binary file without
1970 asking for a specific length. This problem only affected files opened
1971 using the new "io" module, not the built-in open() function.
1973 - Issue #3449: Update decimal module to use most recent specification
1974 (v. 1.68) and tests (v. 2.58) from IBM.
1976 - Issue 3437: Bug fix in robotparser parsing of Allow: lines.
1978 - Issue 1592: Improve error reporting when operations are attempted
1981 - Deprecate the "ast" parser function aliases.
1983 - Issue #3120: On 64-bit Windows the subprocess module was truncating handles.
1985 - Issue #3303: Fix a crash in locale.strcoll() when calling it with
1988 - Issue #3302: Fix several crashes when calling locale's gettext functions
1989 with None arguments.
1991 - Issue #3389: Allow resolving dotted names for handlers in logging
1992 configuration files.
1994 - Deprecate the sunaudio module for removal in Python 3.0.
1996 - Issue #3394: zipfile.writestr sets external attributes when passed a
1997 file name rather than a ZipInfo instance, so files are extracted with
1998 mode 0600 rather than 000 under Unix.
2000 - Issue #1857: subprocess.Popen.poll gained an additional _deadstate keyword
2001 argument in python 2.5, this broke code that subclassed Popen to include its
2002 own poll method. Fixed my moving _deadstate to an _internal_poll method.
2007 - Generate the PatternGrammar pickle during "make install".
2012 - Issue #2235: the C API function PyObject_HashNotImplemented and its
2013 interaction with the tp_hash slot (added in 2.6b2) are now documented
2015 - Issue #643841: The language reference now provides more detailed
2016 coverage of the lookup process for special methods. The disclaimers
2017 regarding lack of coverage of new-style classes have also been
2018 removed, since the coverage is now fairly reasonable.
2021 What's New in Python 2.6 beta 2?
2022 ================================
2024 *Release date: 17-Jul-2008*
2029 - Issue #3156: Fix inconsistent behavior of the bytearray type: all
2030 its methods now allow for items objects that can be converted to
2031 an integer using operator.index().
2033 - Issue #3360: Fix incorrect parsing of '020000000000.0', which
2034 produced a ValueError instead of giving the correct float.
2036 - Issue #3083: Add alternate (#) formatting for bin, oct, hex output
2037 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
2039 - Issue #3008: the float type has a new instance method 'float.hex'
2040 and a new class method 'float.fromhex' to convert floating-point
2041 numbers to and from hexadecimal strings, respectively.
2043 - Issue #2235: __hash__ is once again inherited by default. To allow
2044 collections.Hashable to remain meaningful in the presence of the
2045 default hash implementation (object.__hash__), it is now possible
2046 to explicit block inheritance of hash by setting __hash__=None at
2047 the Python level, or tp_hash=PyObject_HashNotImplemented at the C
2050 - Issue #3221: Issue a RuntimeWarning instead of raising SystemError if
2051 the parent module cannot be found while performing an absolute import.
2052 This means that an incorrectly defined __package__ attribute will
2053 now only prevent relative imports in that module rather than causing
2054 all imports from that module to fail.
2056 - Issue #2517: Allow unicode messages in Exceptions again by correctly
2057 bypassing the instance dictionary when looking up __unicode__ on
2060 - Issue #3242: Fix a crash inside the print statement, if sys.stdout is
2061 set to a custom object whose write() method happens to install
2062 another file in sys.stdout.
2064 - Issue #3088: Corrected a race condition in classes derived from
2065 threading.local: the first member set by a thread could be saved in
2066 another thread's dictionary.
2068 - Issue #3004: Minor change to slice.indices(): the start and stop
2069 arguments are now treated identically, making the behaviour easier
2070 to describe and understand. For example, slice(None, -10,
2071 1).indices(9) now returns (0, 0, 1) instead of (0, -1, 1), and
2072 slice(None, 10, -1).indices(10) returns (9, 9, -1) instead of (9,
2075 - Issue #3219: Calling a function with repeated keyword arguments,
2076 f(a=2, a=23), would not cause a syntax error. This was a regression
2077 from 2.4 caused by the switch to the new compiler.
2079 - Issue #2862: Make int and float freelist management consistent with
2080 other freelists. Changes their CompactFreeList apis into
2081 ClearFreeList apis and calls them via gc.collect().
2086 - Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
2087 api functions without holding the GIL, which could lead to a fatal
2088 error when they failed.
2090 - Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
2092 - Issue #3395: fix reference in test_multiprocessing to old debugInfo method
2094 - Issue #3312: Fix two crashes in sqlite3.
2096 - Issue #1608818: Fix misbehavior in os.listdir() if readdir() fails.
2098 - Issue #3125: Remove copy_reg in multiprocessing and replace it with
2099 ForkingPickler.register() to resolve conflict with ctypes.
2101 - Issue #3090: Fixed ARCHFLAGS parsing on OS/X
2103 - Issue #3313: Fixed a crash when a failed dlopen() call does not set
2104 a valid dlerror() message.
2106 - Issue #3258: Fixed a crash when a ctypes POINTER type to an
2107 incomplete structure was created.
2109 - Issue #3339: dummy_thread.acquire() should not return None.
2111 - Issue #3285: Fractions from_float() and from_decimal() accept Integral arguments.
2113 - Issue #3301: Bisect module behaved badly when lo was negative.
2115 - Issue #839496: SimpleHTTPServer used to open text files in text mode. This is
2116 both unnecessary (HTTP allows text content to be sent in several forms) and
2117 wrong because the actual transmitted size could differ from the
2118 content-length. The problem had been corrected in the 2.4 branch, but never
2121 - Issue #2663: add filtering capability to shutil.copytree().
2123 - Issue #1622: Correct interpretation of various ZIP header fields.
2125 - Issue #1526: Allow more than 64k files to be added to Zip64 file.
2127 - Issue #1746: Correct handling of zipfile archive comments (previously
2128 archives with comments over 4k were flagged as invalid). Allow writing
2129 Zip files with archives by setting the 'comment' attribute of a ZipFile.
2131 - Issue #449227: The rlcompleter module now adds "(" to callable objects
2134 - Issue #3190: Pydoc now hides the automatic module attribute __package__ (the
2135 handling is now the same as that of other special attributes like __name__).
2137 - Issue #2885 (partial): The urllib.urlopen() function has been deprecated for
2138 removal in Python 3.0 in favor of urllib2.urlopen().
2140 - Issue #2113: Fix error in subprocess.Popen if the select system call is
2141 interrupted by a signal.
2143 - Issue #3309: Fix bz2.BZFile iterator to release its internal lock
2144 properly when raising an exception due to the bz2file being closed.
2145 Prevents a deadlock.
2147 - Issue #3094: httplib.HTTPSConnection Host: headers no longer include the
2148 redundant ":443" port number designation when the connection is using the
2149 default https port (443).
2151 - Issue #874900: after an os.fork() call the threading module state is cleaned
2152 up in the child process to prevent deadlock and report proper thread counts
2153 if the new process uses the threading module.
2158 - test.test_support.catch_warning now keeps track of all warnings it sees
2159 and is now better documented. Explicit unit tests for this context manager
2160 have been added to test_warnings.
2165 - Issue #3215: Build sqlite3 as sqlite3.dll, not sqlite3.pyd.
2171 - Document that robotparser has been renamed to urllib.robotparser in
2174 - Document that urlparse has been renamed to urllib.parse in Python 3.0.
2176 - Document that urllib2 is split across multiple modules and renamed in
2179 - Document that urllib is split across multiple modules and renamed in
2183 What's New in Python 2.6 beta 1?
2184 ================================
2186 *Release date: 18-June-2008*
2191 - Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
2192 argument being anything other than a dict or None. Also fixed a bug in error
2193 handling when 'message' and 'category' were both set to None, triggering a
2196 - Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
2197 holds the last (strong) reference to its referent.
2199 - Add future_builtins.ascii().
2201 - Several set methods now accept multiple arguments: update(), union(),
2202 intersection(), intersection_update(), difference(), and difference_update().
2204 - Issue #2898: Added sys.getsizeof() to retrieve size of objects in bytes.
2206 - New environment variable PYTHONIOENCODING.
2208 - Patch #2488: Add sys.maxsize.
2210 - Issue #2353: file.xreadlines() now emits a Py3k warning.
2212 - Issue #2863: generators now have a ``gen.__name__`` attribute that
2213 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
2214 ``func.func_code.co_name``. The repr() of a generator now also
2217 - Issue #2831: enumerate() now has a ``start`` argument.
2219 - Issue #2801: fix bug in the float.is_integer method where a
2220 ValueError was sometimes incorrectly raised.
2222 - Issue #2790: sys.flags was not properly exposing its bytes_warning
2225 - Issue #2196: hasattr() now lets exceptions which do not inherit
2226 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
2229 - Added checks for integer overflows, contributed by Google. Some are
2230 only available if asserts are left in the code, in cases where they
2231 can't be triggered from Python code.
2236 - Issue #1179: [CVE-2007-4965] Integer overflow in imageop module.
2238 - Issue #3116: marshal.dumps() had quadratic behavior for strings > 32Mb.
2240 - Issue #2138: Add factorial() to the math module.
2242 - The heapq module does comparisons using LT instead of LE. This
2243 makes its implementation match that used by list.sort().
2245 - Issue #2819: add full-precision summation function to math module,
2246 based on Hettinger's ASPN Python Cookbook recipe.
2248 - Issue #2592: delegate nb_index and the floor/truediv slots in
2251 - Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
2254 - Support for Windows 9x has been removed from the winsound module.
2256 - bsddb module updated to version 4.7.3.
2257 http://www.jcea.es/programacion/pybsddb.htm#bsddb3-4.7.3. This
2258 code should be compatible with Python 3.0.
2260 - Issue #2858: Fix potential memory corruption when
2261 bsddb.db.DBEnv.lock_get and other bsddb.db object constructors
2262 raised an exception.
2264 - Issue #2669: bsddb/__init__.py iteration no longer silently fails when
2265 the database has changed size during iteration. It now raises a
2266 RuntimeError in the same manner as a dictionary.
2268 - Issue #2870: cmathmodule.c compile error.
2270 - Added a threading.Thread.ident property.
2275 - logging.config: Removed out-of-date comment in _install_handlers and
2276 used issubclass in place of equality comparison of classes.
2278 - Issue #2722: Now the os.getcwd() supports very long path names.
2280 - Issue #2888: Fixed the behaviour of pprint when working with nested
2281 structures, to match the behaviour of 2.5 and 3.0 (now follows the common
2284 - Issue #1817: cgi now correctly handles the querystring on POST requests
2286 - Issue #3136: fileConfig()'s disabling of old loggers is now conditional via
2287 an optional disable_existing_loggers parameter, but the default value is
2288 such that the old behaviour is preserved. Thanks to Leandro Lucarella for
2291 - Issue #3126: StreamHandler and FileHandler check before calling "flush" and
2292 "close" that the stream object has these, using hasattr (thanks to bobf for
2295 - Issue #2912: platform.uname now tries to determine unknown information even if
2298 - The rfc822 module has been deprecated for removal in 3.0.
2300 - The mimetools module has been deprecated for removal in 3.0.
2302 - The ctypes.byref function now takes an optional second parameter
2303 which allows to specify an offset in bytes for the constructed
2304 pointer-like object.
2306 - Added the ast module.
2308 - Added the multiprocessing module, PEP 371.
2310 - Factored out the indentation cleaning from inspect.getdoc() into
2311 inspect.cleandoc() to ease standalone use.
2313 - Issue #1798: Add ctypes calling convention that allows safe access
2316 - Issue #2404: ctypes objects support the new pep3118 buffer interface.
2318 - Patch #2125: Add GetInteger and GetString methods for
2319 msilib.Record objects.
2321 - Issue #2782: The datetime module's strftime methods now accept
2322 unicode format strings just as time.strftime always has.
2324 - The sgmllib and htmllib modules have been deprecated for removal
2327 - Issue #3011: locale module alias table was updated to the latest
2328 version from the X.org locale.alias file.
2330 - Issue #1797 (partial fix): ctypes NULL function pointers have a
2331 False boolean value now.
2333 - Issue #2985: Allow 64-bit integer responses (``<i8>``) in XMLRPC
2336 - Issue #2877: The UserString.MutableString class has been removed in
2339 - Do not close external file objects passed to tarfile.open(mode='w:bz2')
2340 when the TarFile is closed.
2342 - Issue #2959: For consistency with other file-like objects, gzip's
2343 GzipFile.close() can now be called multiple times without raising
2346 - Issue #1390: Raise ValueError in toxml when an invalid comment would
2347 otherwise be produced.
2349 - Issue #2914: TimedRotatingFileHandler now takes an optional keyword
2350 argument "utc" to use UTC time rather than local time.
2352 - Issue #2929: TimedRotatingFileHandler was using the wrong path when
2353 deleting old log files (filename only instead of full path).
2355 - Issue #1775025: You can now specify zipfile members to open(),
2356 read() or extract() via a ZipInfo instance. This allows handling
2357 duplicate filenames in zipfiles.
2359 - Issue #961805: Fix Text.edit_modified() in Tkinter.
2361 - Issue #1793: Function ctypes.util.find_msvcrt() added that returns
2362 the name of the C runtime library that Python uses.
2363 ctypes.util.find_library(name) now call this function when name is
2366 - The statvfs module has been deprecated for removal in Python 3.0.
2368 - The sunaudiodev and SUNAUDIODEV modules have been deprecated for
2369 removal in Python 3.0.
2371 - The WAIT module from IRIX has been deprecated for removal in Python
2374 - The torgb module from IRIX has been deprecated for removal in Python
2377 - The SV module from IRIX has been deprecated for removal in Python
2380 - The readcd module from IRIX has been deprecated for removal in
2383 - The panelparser module from IRIX has been deprecated for removal in
2386 - The panel module from IRIX has been deprecated for removal in Python
2389 - The jpeg module from IRIX has been deprecated for removal in Python
2392 - The IOCTL module from IRIX has been deprecated for removal in Python
2395 - The IN module from IRIX has been deprecated for removal in Python
2398 - The imgfile module from IRIX has been deprecated for removal in
2401 - The GLWS module from IRIX has been deprecated for removal in Python
2404 - The GET module from IRIX has been deprecated for removal in Python
2407 - The fm module from IRIX has been deprecated for removal in Python
2410 - The FL, flp, and fl modules from IRIX have been deprecated for
2411 removal in Python 3.0.
2413 - The FILE module on IRIX has been deprecated for removal in Python
2416 - The ERRNO module on IRIX has been deprecated for removal in Python
2419 - The DEVICE, GL, gl, and cgen modules (which indirectly includes
2420 cgensupport) have been deprecated for removal in Python 3.0.
2422 - The CL, CL_old, and cl modules for IRIX have been deprecated for
2423 removal in Python 3.0.
2425 - The cdplayer module for IRIX has been deprecated for removal in
2428 - The cddb module for IRIX has been deprecated for removal in Python
2431 - The cd and CD modules for IRIX have been deprecated for removal in
2434 - The al and AL modules for IRIX have been deprecated for removal in
2437 - Issue #1713041: fix pprint's handling of maximum depth.
2439 - The timing module has been deprecated for removal in Python 3.0.
2441 - The sv module has been deprecated for removal in Python 3.0.
2443 - The multifile module has been deprecated as per PEP 4.
2445 - The imageop module has been deprecated for removal in Python 3.0.
2447 - Issue #2250: Exceptions raised during evaluation of names in
2448 rlcompleter's ``Completer.complete()`` method are now caught and
2451 - Issue #2659: Added ``break_on_hyphens`` option to textwrap
2454 - The mhlib module has been deprecated for removal in Python 3.0.
2456 - The linuxaudiodev module has been deprecated for removal in Python
2459 - The ihooks module has been deprecated for removal in Python 3.0.
2461 - The fpformat module has been deprecated for removal in Python 3.0.
2463 - The dl module has been deprecated for removal in Python 3.0.
2465 - The Canvas module has been deprecated for removal in Python 3.0.
2467 - The compiler package has been deprecated for removal in Python 3.0.
2469 - The Bastion and rexec modules have been deprecated for removal in
2472 - The bsddb185 module has been deprecated for removal in Python 3.0.
2474 - The pure module has been deprecated for removal in Python 3.0.
2476 - Issue #2487: change the semantics of math.ldexp(x, n) when n is too
2477 large to fit in a C long. ldexp(x, n) now returns a zero (with
2478 suitable sign) if n is large and negative; previously, it raised
2481 - The toaiff module has been deprecated for removal in Python 3.0.
2483 - The test.testall module has been deprecated for removal in Python
2486 - The new module has been deprecated for removal in Python 3.0.
2488 - The user module has been deprecated for removal in Python 3.0.
2490 - The stringold module has been deprecated for removal in Python 3.0.
2492 - The mutex module has been deprecated for removal in Python 3.0.
2494 - The imputil module has been deprecated for removal in Python 3.0.
2496 - test.test_support.catch_warning() gained a 'record' argument.
2498 - os.path.walk is deprecated in favor of os.walk.
2500 - pdb gained the "until" command.
2502 - The Mac Modules (including Carbon) have been deprecated for removal
2505 - Library: on MacOS X you can now set ``ARCHFLAGS`` in the shell
2506 environment to control the '-arch' flags that are used to build
2507 an extension. This was added for compatibility with Apple's build
2510 - The bundled OSX-specific copy of libbffi is now in sync with the version
2511 shipped with PyObjC 2.0 and includes support for x86_64 and ppc64 platforms.
2513 - The threading module gained aliases for names that will be removed in the
2519 - The Windows installer now includes Tk 8.5, bzip2 1.0.5, and SQLite 3.5.9.
2521 - Patch #1722225: Support QNX 6.
2523 - ``Lib/lib-old`` is now added to sys.path.
2525 - On MacOS X it is now possible to install the framework in 64-bit
2526 mode or even as a 4-way universal binary (that is, PPC, i386,
2527 PPC64 and x86_64 support in one binary).
2529 This is controlled by the configure argument ``--with-universal-archs``:
2531 - ``--with-universal-archs=all``: install 4-way universal
2533 - ``--with-universal-archs=32-bit``: install 2-way universal, 32-bit (the default)
2535 - ``--with-universal-archs=64-bit``: install 2-way universal, 64-bit
2537 This option should be used in combination with ``--enable-universalsdk=``.
2539 NOTE: 64-bit and 4-way builds are only suppported on Mac OS X 10.5 (or later).
2545 - Add ``PyType_Modified()`` as a public API to clear the type cache.
2547 - The PyBytes functions have been renamed to PyByteArray.
2549 - The PyString functions have been renamed to PyBytes. A batch of
2550 defines were added so that the linker still sees the original
2554 What's New in Python 2.6 alpha 3?
2555 =================================
2557 *Release date: 08-May-2008*
2562 - Issue #2719: backported the ``next()`` builtin from Python 3.
2564 - Issue #2681: The octal literal ``0o8`` was incorrecly acctepted. Now
2565 it properly raises a SyntaxError.
2567 - Issue #2617: Reserved -J and -X arguments for Jython, IronPython and
2568 other implementations of Python.
2570 - Implemented PEP 370: Per user site-packages directory.
2575 - Issue #2670: Fix a failure in urllib2.build_opener(), when passed
2576 two handlers that derive the same default base class.
2578 - Added kill, terminate and send_signal(sig) to subprocess.Popen.
2580 - Added phase(z) -> phi, polar(z) -> r, phi and rect(r, phi) -> z to
2583 - Four new methods were added to the math and cmath modules: acosh,
2584 asinh, atanh and log1p.
2586 - zlib.decompressobj().flush(value) no longer crashes the interpreter
2587 when passed a value less than or equal to zero.
2589 - Issue #1631171: Re-implement the 'warnings' module in C (the
2590 original Python code has been kept as backup). This will allow for
2591 using the 'warning's machinery in such places as the parser where
2592 use of pure Python code is not possible. Both the ``showarning()``
2593 and ``formatwarning()`` gain an optional 'line' argument which is
2594 not called by default for backwards-compatibility reasons. Setting
2595 ``warnings.showwarning()`` to an implementation that lacks support
2596 for the ``line`` argument will raise a DeprecationWarning.
2601 - The audiodev module has been deprecated for removal in Python 3.0.
2603 - Issue #2750: Add the 'json' package. Based on simplejson 1.9 and
2604 contributed by Bob Ippolito.
2606 - Issue #1734346: Support Unicode file names for zipfiles.
2608 - Issue #2581: distutils: Vista UAC/elevation support for
2611 - Issue #2635: Fix bug in 'fix_sentence_endings' textwrap.fill option,
2612 where an extra space was added after a word containing (but not
2613 ending in) '.', '!' or '?'.
2615 - Add from_buffer() and from_buffer_copy() class methods to ctypes
2618 - Issue #2682: ctypes callback functions no longer contain a cyclic
2619 reference to themselves.
2621 - The getpass module has been improved on Unix. It now uses /dev/tty
2622 by default and uses stderr instead of stdout. A GetPassWarning is
2623 issued when input echo cannot be controlled.
2625 - Issue #2014: Allow XML-RPC datetime objects to have dates before
2628 - Issue #2439: Added new function pkgutil.get_data(), which is a
2629 convenience wrapper for the PEP 302 get_data() API.
2631 - Issue #2616: The ctypes.pointer() and ctypes.POINTER() functions are
2632 now implemented in C for better performance.
2634 - Issue #2408: The ``_types`` module, which was used as in
2635 implementation detail of the public ``types`` module, has been
2636 removed and replaced by pure python code.
2638 - Issue #2513: distutils on Windows is now capable of cross-compiling
2639 extension modules between 32 and 64 bit platforms. See the distutls
2640 build documentation for more information.
2642 - Issue #815646: Individual file objects may now be used from multiple
2643 threads at once without fear of crashing the Python interpreter. If
2644 file.close() is called while an object is in use by another thread
2645 an IOError exception will be raised and the file will not be closed.
2647 - The bundled libffi copy is now in sync with the recently released
2648 libffi3.0.5 version, apart from some small changes to
2649 Modules/_ctypes/libffi/configure.ac.
2651 - Issue #2385: distutils.core.run_script() makes __file__ available,
2652 so the controlled environment will more closely mirror the typical
2653 script environment. This supports setup.py scripts that refer to
2659 - Issue #2550: The approach used by client/server code for obtaining
2660 ports to listen on in network-oriented tests has been refined in an
2661 effort to facilitate running multiple instances of the entire
2662 regression test suite in parallel without issue.
2663 test_support.bind_port() has been fixed such that it will always
2664 return a unique port -- which wasn't always the case with the
2665 previous implementation, especially if socket options had been set
2666 that affected address reuse (i.e. SO_REUSEADDR, SO_REUSEPORT). The
2667 new implementation of bind_port() will actually raise an exception
2668 if it is passed an AF_INET/SOCK_STREAM socket with either the
2669 SO_REUSEADDR or SO_REUSEPORT socket option set. Furthermore, if
2670 available, bind_port() will set the SO_EXCLUSIVEADDRUSE option on
2671 the socket it's been passed. This currently only applies to
2672 Windows. This option prevents any other sockets from binding to the
2673 host/port we've bound to, thus removing the possibility of the
2674 'non-deterministic' behaviour, as Microsoft puts it, that occurs
2675 when a second SOCK_STREAM socket binds and accepts to a host/port
2676 that's already been bound by another socket. The optional preferred
2677 port parameter to bind_port() has been removed. Under no
2678 circumstances should tests be hard coding ports!
2680 test_support.find_unused_port() has also been introduced, which will
2681 pass a temporary socket object to bind_port() in order to obtain an
2682 unused port. The temporary socket object is then closed and
2683 deleted, and the port is returned. This method should only be used
2684 for obtaining an unused port in order to pass to an external program
2685 (i.e. the -accept [port] argument to openssl's s_server mode) or as
2686 a parameter to a server-oriented class that doesn't give you direct
2687 access to the underlying socket used.
2689 Finally, test_support.HOST has been introduced, which should be used
2690 for the host argument of any relevant socket calls (i.e. bind and
2693 The following tests were updated to following the new conventions:
2694 test_socket, test_smtplib, test_asyncore, test_ssl, test_httplib,
2695 test_poplib, test_ftplib, test_telnetlib, test_socketserver,
2696 test_asynchat and test_socket_ssl.
2698 It is now possible for multiple instances of the regression test
2699 suite to run in parallel without issue.
2704 - Issue #1496032: On alpha, use -mieee when gcc is the compiler.
2706 - Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
2707 gcc is used as compiler.
2709 - Issue #2573: On MacOS X it is now possible to install the framework
2710 with a different name using --with-framework-name=NAME.
2715 - Added implementation of copysign, acosh, asinh, atanh and log1p to
2716 the new files Include/pymath.h and Python/pymath.h for platforms
2717 which provide the functions through their libm. The files also
2718 contains several helpers and constants for math.
2720 - Added a new convenience macro, PyErr_WarnPy3k, for issuing Py3k warnings.
2723 What's New in Python 2.6 alpha 2?
2724 =================================
2726 *Release date: 02-Apr-2008*
2731 - Issue #1733757: The interpreter would hang on shutdown if the
2732 tracing function set by sys.settrace is still active and happens to
2733 call threading.currentThread().
2735 - Patch #1442: properly report exceptions when the PYTHONSTARTUP file
2738 - The compilation of a class nested in another class used to leak one
2739 reference on the outer class name.
2741 - Patch #1810: compile() can now compile _ast trees as returned by
2742 ``compile(..., PyCF_ONLY_AST)``.
2744 - Patch #2426: Added sqlite3.Connection.iterdump method to allow easy
2745 dumping of databases. Contributed by Paul Kippes at PyCon 2008.
2747 - Patch #2477: Added from __future__ import unicode_literals.
2749 - Added backport of bytearray type.
2751 - Issue #2355: add Py3k warning for buffer().
2753 - Issue #1477: With narrow Unicode builds, the unicode escape sequence
2754 \Uxxxxxxxx did not accept values outside the Basic Multilingual
2755 Plane. This affected raw unicode literals and the
2756 'raw-unicode-escape' codec. Now UTF-16 surrogates are generated in
2757 this case, like normal unicode literals and the 'unicode-escape'
2760 - Issue #2348: add Py3k warning for file.softspace.
2762 - Issue #2346/#2347: add Py3k warnings for __methods__ and
2765 - Issue #2358: Add a Py3k warning on sys.exc_clear() usage.
2767 - Issue #2400: Allow relative imports to "import *".
2769 - Issue #1745: Backport print function with ``from __future__ import
2772 - Issue #2332: add new attribute names for instance method objects.
2773 The two changes are: im_self -> __self__ and im_func -> __func__
2775 - Issue #2379: Raise a Py3K warning for __getitem__ or __getslice__ on
2776 exception instances.
2778 - Issue #2371: Add a Py3k warning when catching an exception that
2779 doesn't derive from BaseException.
2781 - Issue #2341: Add a Py3k warning when raising an exception that
2782 doesn't derive from BaseException.
2784 - Issue #2321: use pymalloc for unicode object string data to reduce
2785 memory usage in some circumstances.
2787 - PEP 3127: octal literals now start with "0o". Old-style octal
2788 literals are still valid. There are binary literals with a prefix of
2789 "0b". This also affects int(x, 0).
2791 - Issue #2359: Adding deprecation warnings for array.{read,write}.
2793 - Issue #1779871: GNU gcc can now build Python on OS X because the
2794 flags -Wno-long-double, -no-cpp-precomp, and -mno-fused-madd are no
2797 - Add a warning when asserting a non-empty tuple which is always true.
2799 - Issue #2179: speed up with statement execution by storing the exit
2800 method on the stack instead of in a temporary variable (patch by
2803 - Issue #2238: Some syntax errors in *args and **kwargs expressions
2804 could give bogus error messages.
2806 - Issue #2143: Fix embedded readline() hang on SSL socket EOF.
2811 - Patch #2240: Implement signal.setitimer and signal.getitimer.
2816 - Issue #2315: logging.handlers: TimedRotatingFileHandler now accounts
2817 for daylight savings time in calculating the next rollover.
2819 - Issue #2316: logging.handlers: TimedRotatingFileHandler now
2820 calculates rollovers correctly even when nothing is logged for a
2823 - Issue #2317: logging.handlers: TimedRotatingFileHandler now uses
2824 improved logic for removing old files.
2826 - Issue #2495: tokenize.untokenize now inserts a space between two
2827 consecutive string literals; previously, ["" ""] was rendered as
2828 [""""], which is incorrect python code.
2830 - Issue #2248: return the result of the QUIT command. from
2833 - Backport of Python 3.0's io module.
2835 - Issue #2482: Make sure that the coefficient of a Decimal is always
2836 stored as a str instance, not as a unicode instance. This ensures
2837 that str(Decimal) is always an instance of str.
2839 - Issue #2478: fix failure of decimal.Decimal(0).sqrt()
2841 - Issue #2432: give DictReader the dialect and line_num attributes
2842 advertised in the docs.
2844 - Issue #2460: Make Ellipsis object copyable.
2846 - Issue #1681432: Add triangular distribution to the random module
2848 - Issue #2136: urllib2's auth handler now allows single-quoted realms
2849 in the WWW-Authenticate header.
2851 - Issue #2434: Enhanced platform.win32_ver() to also work on Python
2852 installation which do not have the win32all package installed.
2854 - Added support to platform.uname() to also report the machine and
2855 processor information on Windows XP and later. As a result,
2856 platform.machine() and platform.processor() will report this
2857 information as well.
2859 - The library implementing the 2to3 conversion, lib2to3, was added to
2860 the standard distribution.
2862 - Issue #1747858: Fix chown to work with large uid's and gid's on
2865 - Issue #1202: zlib.crc32 and zlib.adler32 no longer return different
2866 values on 32-bit vs. 64-bit python interpreters. Both were correct,
2867 but they now both return a signed integer object for consistency.
2869 - Issue #1158: add %f format (fractions of a second represented as
2870 microseconds) to datetime objects. Understood by both strptime and
2873 - Issue #705836: struct.pack(">f", x) now raises OverflowError on all
2874 platforms when x is too large to fit into an IEEE 754 float;
2875 previously it only raised OverflowError on non IEEE 754 platforms.
2877 - Issues #2166, #1741 and #1531505: now distutils deals with HOME
2878 correctly under win32
2880 - Patch #1858: distutils: added multiple server support in .pypirc
2882 - Issue #1106316: pdb.post_mortem()'s parameter, "traceback", is now
2883 optional: it defaults to the traceback of the exception that is
2884 currently being handled (is mandatory to be in the middle of an
2885 exception, otherwise it raises ValueError).
2887 - Issue #1193577: A .shutdown() method has been added to SocketServers
2888 which terminates the .serve_forever() loop.
2890 - Issue #2220: handle rlcompleter attribute match failure more
2893 - Issue #2225: py_compile, when executed as a script, now returns a
2894 non- zero status code if not all files could be compiled
2897 - Bug #1725737: In distutils' sdist, exclude RCS, CVS etc. also in the
2898 root directory, and also exclude .hg, .git, .bzr, and _darcs.
2900 - Issue #1872: The struct module typecode for _Bool has been changed
2903 - The bundled libffi copy is now in sync with the recently released
2904 libffi3.0.4 version, apart from some small changes to
2905 Modules/_ctypes/libffi/configure.ac. On OS X, preconfigured libffi
2906 files are used. On all linux systems the --with-system-ffi
2907 configure option defaults to "yes".
2909 - Issue #1577: shutil.move() now calls os.rename() if the destination
2910 is a directory instead of copying-then-remove-source.
2915 - test_nis no longer fails when test.test_support.verbose is true and
2916 NIS is not set up on the testing machine.
2918 - Output comparison tests are no longer supported.
2920 - Rewrite test_errno to use unittest and no longer be a no-op.
2922 - GHOP 234: Convert test_extcall to doctest.
2924 - GHOP 290: Convert test_dbm and test_dummy_threading to unittest.
2926 - GHOP 293: Convert test_strftime, test_getargs, and test_pep247 to
2929 - Issue #2055: Convert test_fcntl to unittest.
2931 - Issue 1960: Convert test_gdbm to unittest.
2933 - GHOP 294: Convert test_contains, test_crypt, and test_select to
2936 - GHOP 238: Convert test_tokenize to use doctest.
2938 - GHOP 237: Rewrite test_thread using unittest.
2940 - Patch #2232: os.tmpfile might fail on Windows if the user has no
2941 permission to create files in the root directory.
2946 - A new script 2to3 is now installed, to run the 2.x to 3.x converter.
2948 - Python/memmove.c and Python/strerror.c have been removed; both
2949 functions are in the C89 standard library.
2951 - Patch #2284: Add -x64 option to rt.bat.
2956 - Patch #2477: Added PyParser_ParseFileFlagsEx() and
2957 PyParser_ParseStringFlagsFilenameEx().
2960 What's New in Python 2.6 alpha 1?
2961 =================================
2963 *Release date: 29-Feb-2008*
2968 - Issue #2051: pyc and pyo files are no longer created with permission
2969 644. The mode is now inherited from the py file.
2971 - Issue #2067: file.__exit__() now calls subclasses' close() method.
2973 - Patch #1759: Backport of PEP 3129 class decorators.
2975 - Issue #1881: An internal parser limit has been increased. Also see
2976 issue 215555 for a discussion.
2978 - Added the future_builtins module, which contains hex() and oct().
2979 These are the PEP 3127 version of these functions, designed to be
2980 compatible with the hex() and oct() builtins from Python 3.0. They
2981 differ slightly in their output formats from the existing, unchanged
2982 Python 2.6 builtins. The expected usage of the future_builtins
2984 from future_builtins import hex, oct
2986 - Issue #1600: Modifed PyOS_ascii_formatd to use at most 2 digit
2987 exponents for exponents with absolute value < 100. Follows C99
2988 standard. This is a change on Windows, which would use 3 digits.
2989 Also, added 'n' to the formats that PyOS_ascii_formatd understands,
2990 so that any alterations it does to the resulting string will be
2991 available in stringlib/formatter.h (for float.__format__).
2993 - Implemented PEP 3101, Advanced String Formatting. This adds a new
2994 builtin format(); a format() method for str and unicode; a
2995 __format__() method to object, str, unicode, int, long, float, and
2996 datetime; the class string.Formatter; and the C API
2999 - Fixed several potential crashes, all caused by specially crafted
3000 __del__ methods exploiting objects in temporarily inconsistent
3003 - Issue #2115: Important speedup in setting __slot__ attributes. Also
3004 prevent a possible crash: an Abstract Base Class would try to access
3005 a slot on a registered virtual subclass.
3007 - Fixed repr() and str() of complex numbers with infinity or nan as
3008 real or imaginary part.
3010 - Clear all free lists during a gc.collect() of the highest generation
3011 in order to allow pymalloc to free more arenas. Python may give back
3012 memory to the OS earlier.
3014 - Issue #2045: Fix an infinite recursion triggered when printing a
3015 subclass of collections.defaultdict, if its default_factory is set
3018 - Fixed a minor memory leak in dictobject.c. The content of the free
3019 list was not freed on interpreter shutdown.
3021 - Limit free list of method and builtin function objects to 256
3024 - Patch #1953: Added ``sys._compact_freelists()`` and the C API
3025 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
3026 to compact the internal free lists of pre-allocted ints and floats.
3028 - Issue #1983: Fixed return type of fork(), fork1() and forkpty()
3029 calls. Python expected the return type int but the fork familie
3032 - Issue #1678380: Fix a bug that identifies 0j and -0j when they
3033 appear in the same code unit.
3035 - Issue #2025: Add tuple.count() and tuple.index() methods to comply
3036 with the collections.Sequence API.
3038 - Patch #1970 by Antoine Pitrou: Speedup unicode whitespace and
3041 - Added ``PyType_ClearCache()`` and ``sys._clear_type_cache`` to clear
3042 the internal lookup cache for ref leak tests.
3044 - Patch #1473257: generator objects gain a gi_code attribute. This is
3045 the same object as the func_code attribute of the function that
3046 produced the generator.
3048 - Issue #1920: "while 0" statements were completely removed by the
3049 compiler, even in the presence of an "else" clause, which is
3050 supposed to be run when the condition is false. Now the compiler
3051 correctly emits bytecode for the "else" suite.
3053 - A few crashers fixed: weakref_in_del.py (issue #1377858);
3054 loosing_dict_ref.py (issue #1303614, test67.py);
3055 borrowed_ref_[34].py (not in tracker).
3057 - Issue #1069410: The "can't load dll" message box on Windows is
3058 suppressed while an extension is loaded by calling SetErrorMode in
3059 dynload_win.c. The error is still reported properly.
3061 - Issue #1915: Python compiles with --enable-unicode=no again. However
3062 several extension methods and modules do not work without unicode
3065 - Issue #1882: when compiling code from a string, encoding cookies in the
3066 second line of code were not always recognized correctly.
3068 - Issue #1679: "0x" was taken as a valid integer literal.
3070 - Issue #1865: ``bytes`` as an alias for ``str`` and b"" as an alias "" were
3073 - sys.float_info / PyFloat_GetInfo: The floating point information
3074 object was converted from a dict to a specialized structseq object.
3076 - Patch #1816: Added sys.flags structseq. It exposes the status of
3077 most command line arguments and PYTHON* environment variables.
3079 - Objects/structseq.c: Implemented new structseq representation. The
3080 patch makes structseqs (e.g. the return value of os.stat) more
3083 - Patch #1700288: added a type attribute cache that caches method
3084 accesses, resulting in speedups in heavily object-oriented code.
3086 - Bug #1776: __import__() no longer accepts filenames on any platform.
3087 The first parameter to __import__() must be a valid module name.
3089 - Patch #1668: renamed THREADDEBUG envvar to PYTHONTHREADDEBUG.
3091 - Patch #602345: Add -B command line option, PYTHONDONTWRITEBYTECODE
3092 envvar and sys.dont_write_bytecode attribute. All these can be set
3093 to forbid Python to attempt to write compiled bytecode files.
3095 - Improve some exception messages when Windows fails to load an
3096 extension module. Now we get for example '%1 is not a valid Win32
3097 application' instead of 'error code 193'.
3099 - Bug #1481296: Fixed long(float('nan')) != 0L.
3101 - Issue #1640: Added math.isinf(x), math.isnan(x) and math.copysign(x,
3104 - Issue #1635: Platform independent creation and representation of NaN
3105 and INF. float("nan"), float("inf") and float("-inf") now work on
3106 every platform with IEEE 754 semantics.
3108 - Compiler now generates simpler and faster code for dictionary
3109 literals. The oparg for BUILD_MAP now indicates an estimated
3110 dictionary size. There is a new opcode, STORE_MAP, for adding
3111 entries to the dictionary.
3113 - Issue #1638: %zd configure test fails on Linux.
3115 - Issue #1620: New property decorator syntax was modifying the
3116 decorator in place instead of creating a new decorator object.
3118 - Issue #1538: Avoid copying string in split/rsplit if the split char
3121 - Issue #1553: An erroneous __length_hint__ can make list() raise a
3124 - PEP 366: Allow explicit relative imports when executing modules
3125 inside packages with the -m switch via a new module level
3126 __package__ attribute.
3128 - Issue #1402: Fix a crash on exit, when another thread is still
3129 running, and if the deallocation of its frames somehow calls the
3130 PyGILState_Ensure() / PyGILState_Release() functions.
3132 - Expose the Py_Py3kWarningFlag as sys.py3kwarning.
3134 - Issue #1445: Fix a SystemError when accessing the ``cell_contents``
3135 attribute of an empty cell object.
3137 - Issue #1460: The utf-7 incremental decoder did not accept truncated
3138 input. It now correctly saves its state between chunks of data.
3140 - Patch #1739468: Directories and zipfiles containing a __main__.py
3141 file can now be directly executed by passing their name to the
3142 interpreter. The directory/zipfile is automatically inserted as the
3143 first entry in sys.path.
3145 - Issue #1265: Fix a problem with sys.settrace, if the tracing
3146 function uses a generator expression when at the same time the
3147 executed code is closing a paused generator.
3149 - sets and frozensets now have an isdisjoint() method.
3151 - optimize the performance of builtin.sum().
3153 - Fix warnings found by the new version of the Coverity checker.
3155 - The enumerate() builtin function is no longer bounded to sequences
3156 smaller than LONG_MAX. Formerly, it raised an OverflowError. Now,
3157 automatically shifts from ints to longs.
3159 - Issue #1686386: Tuple's tp_repr did not take into account the
3160 possibility of having a self-referential tuple, which is possible
3161 from C code. Nor did object's tp_str consider that a type's tp_str
3162 could do something that could lead to an inifinite recursion.
3163 Py_ReprEnter() and Py_EnterRecursiveCall(), respectively, fixed the
3166 - Issue #1164: It was possible to trigger deadlock when using the
3167 'print' statement to write to a file since the GIL was not released
3168 as needed. Now PyObject_Print() does the right thing along with
3169 various tp_print implementations of the built-in types and those in
3170 the collections module.
3172 - Issue #1147: Exceptions were directly allowing string exceptions in
3173 their throw() method even though string exceptions no longer
3176 - Issue #1096: Prevent a segfault from getting the repr of a very
3177 deeply nested list by using the recursion counter.
3179 - Issue #1202533: Fix infinite recursion calls triggered by calls to
3180 PyObject_Call() never calling back out to Python code to trigger
3181 recursion depth updates/checks. Required the creation of a static
3182 RuntimeError instance in case normalizing an exception put the
3183 recursion check value past its limit. Fixes crashers
3184 infinite_rec_(1|2|4|5).py.
3186 - Patch #1031213: Decode source line in SyntaxErrors back to its
3187 original source encoding.
3189 - Patch #1673759: add a missing overflow check when formatting floats
3192 - Prevent expandtabs() on string and unicode objects from causing a
3193 segfault when a large width is passed on 32-bit platforms.
3195 - Issue #1733488: Fix compilation of bufferobject.c on AIX.
3197 - Issue #1722485: remove docstrings again when running with -OO.
3199 - Add new attribute names for function objects. All the func_* become
3200 __*__ attributes. (Some already existed, e.g., __doc__ and
3203 - Add -3 option to the interpreter to warn about features that are
3204 deprecated and will be changed/removed in Python 3.0.
3206 - Patch #1686487: you can now pass any mapping after '**' in function
3209 - except clauses may now be spelled either "except E, target:" or
3210 "except E as target:". This is to provide forwards compatibility
3213 - Deprecate BaseException.message as per PEP 352.
3215 - Issue #1303614: don't expose object's __dict__ when the dict is
3216 inherited from a builtin base.
3218 - When __slots__ are set to a unicode string, make it work the same as
3219 setting a plain string, ie don't expand to single letter identifiers.
3221 - Request #1191699: Slices can now be pickled.
3223 - Request #1193128: str.translate() now allows a None argument for
3224 translations that only remove characters without re-mapping the
3225 remaining characters.
3227 - Patch #1682205: a TypeError while unpacking an iterable is no longer
3228 masked by a generic one with the message "unpack non-sequence".
3230 - Remove unused file Python/fmod.c.
3232 - Bug #1683368: The object.__init__() and object.__new__() methods are
3233 now stricter in rejecting excess arguments. The only time when
3234 either allows excess arguments is when it is not overridden and the
3235 other one is. For backwards compatibility, when both are
3236 overridden, it is a deprecation warning (for now; maybe a Py3k
3237 warning later). Also, type.__init__() insists on the same signature
3238 as supported by type.__new__().
3240 - Patch #1675423: PyComplex_AsCComplex() now tries to convert an
3241 object to complex using its __complex__() method before falling back
3242 to the __float__() method. Therefore, the functions in the cmath
3243 module now can operate on objects that define a __complex__()
3246 - Patch #1623563: allow __class__ assignment for classes with
3247 __slots__. The old and the new class are still required to have the
3250 - Patch #1642547: Fix an error/crash when encountering syntax errors
3251 in complex if statements.
3253 - Patch #1462488: Python no longer segfaults when
3254 ``object.__reduce_ex__()`` is called with an object that is faking
3257 - Patch #1680015: Don't modify __slots__ tuple if it contains an
3260 - Patch #1444529: the builtin compile() now accepts keyword arguments.
3262 - Bug #1678647: write a newline after printing an exception in any
3263 case, even when converting the value to a string failed.
3265 - The dir() function has been extended to call the __dir__() method on
3266 its argument, if it exists. If not, it will work like before. This
3267 allows customizing the output of dir() in the presence of a
3270 - Patch #922167: Python no longer segfaults when faced with infinitely
3271 self-recursive reload() calls (as reported by bug #742342).
3273 - Patch #1675981: remove unreachable code from ``type.__new__()``
3276 - Patch #1491866: change the complex() constructor to allow
3277 parthensized forms. This means complex(repr(x)) now works instead of
3278 raising a ValueError.
3280 - Patch #703779: unset __file__ in __main__ after running a file. This
3281 makes the filenames the warning module prints much more sensible
3282 when a PYTHONSTARTUP file is used.
3284 - Variant of patch #697613: don't exit the interpreter on a SystemExit
3285 exception if the -i command line option or PYTHONINSPECT environment
3286 variable is given, but break into the interactive interpreter just
3287 like on other exceptions or normal program exit.
3289 - Patch #1638879: don't accept strings with embedded NUL bytes in
3292 - Bug #1674503: close the file opened by execfile() in an error
3295 - Patch #1674228: when assigning a slice (old-style), check for the
3296 sq_ass_slice instead of the sq_slice slot.
3298 - When printing an unraisable error, don't print exceptions. before
3299 the name. This duplicates the behavior whening normally printing
3302 - Bug #1653736: Properly discard third argument to
3303 slot_nb_inplace_power.
3305 - PEP 352: Raising a string exception now triggers a TypeError.
3306 Attempting to catch a string exception raises DeprecationWarning.
3308 - Bug #1377858: Fix the segfaulting of the interpreter when an object
3309 created a weakref on itself during a __del__ call for new-style
3310 classes (classic classes still have the bug).
3312 - Bug #1579370: Make PyTraceBack_Here use the current thread, not the
3313 frame's thread state.
3315 - patch #1630975: Fix crash when replacing sys.stdout in
3318 - Prevent seg fault on shutdown which could occur if an object raised
3321 - Bug #1566280: Explicitly invoke threading._shutdown from Py_Main, to
3322 avoid relying on atexit.
3324 - Bug #1590891: random.randrange don't return correct value for big
3327 - Patch #1586791: Better exception messages for some operations on
3328 strings, tuples and lists.
3330 - Bug #1067760: Deprecate passing floats to file.seek.
3332 - Bug #1591996: Correctly forward exception in instance_contains().
3334 - Bug #1588287: fix invalid assertion for `1,2` in debug builds.
3336 - Bug #1576657: when setting a KeyError for a tuple key, make sure
3337 that the tuple isn't used as the "exception arguments tuple".
3339 - Bug #1565514: SystemError not raised on too many nested blocks.
3341 - Bug #1576174: WindowsError now displays the windows error code
3342 again, no longer the posix error code.
3344 - Patch #1549049: Support long values in structmember, issue warnings
3345 if the assigned value for structmember fields gets truncated.
3347 - Update the peephole optimizer to remove more dead code (jumps after
3348 returns) and inline unconditional jumps to returns.
3350 - Bug #1545497: when given an explicit base, int() did ignore NULs
3351 embedded in the string to convert.
3353 - Bug #1569998: break inside a try statement (outside a loop) is now
3354 recognized and rejected.
3356 - list.pop(x) accepts any object x following the __index__ protocol.
3358 - A number of places, including integer negation and absolute value,
3359 were fixed to not rely on undefined behaviour of the C compiler
3362 - Bug #1566800: make sure that EnvironmentError can be called with any
3363 number of arguments, as was the case in Python 2.4.
3365 - Patch #1567691: super() and new.instancemethod() now don't accept
3366 keyword arguments any more (previously they accepted them, but
3369 - Fix a bug in the parser's future statement handling that led to
3370 "with" not being recognized as a keyword after, e.g., this
3371 statement: from __future__ import division, with_statement
3373 - Bug #1557232: fix seg fault with def f((((x)))) and def f(((x),)).
3375 - Fix %zd string formatting on Mac OS X so it prints negative numbers.
3377 - Allow exception instances to be directly sliced again.
3379 - Bug #1551432: Exceptions do not define an explicit __unicode__
3380 method. This allows calling unicode() on exceptions classes
3381 directly to succeed.
3383 - Bug #1542051: Exceptions now correctly call PyObject_GC_UnTrack.
3384 Also make sure that every exception class has __module__ set to
3387 - Bug #1550983: emit better error messages for erroneous relative
3388 imports (if not in package and if beyond toplevel package).
3390 - Overflow checking code in integer division ran afoul of new gcc
3391 optimizations. Changed to be more standard-conforming.
3393 - Patch #1542451: disallow continue anywhere under a finally.
3395 - Patch #1546288: fix seg fault in dict_equal due to ref counting bug.
3397 - The return tuple from str.rpartition(sep) is (tail, sep, head) where
3398 head is the original string if sep was not found.
3400 - Bug #1520864: unpacking singleton tuples in list comprehensions and
3401 generator expressions (x for x, in ... ) works again. Fixing this
3402 problem required changing the .pyc magic number. This means that
3403 .pyc files generated before 2.5c2 will be regenerated.
3405 - ``with`` and ``as`` are now keywords.
3407 - Bug #1664966: Fix crash in exec if Unicode filename can't be
3410 - Issue #1537: Changed GeneratorExit's base class from Exception to
3413 - Issue #1703448: A joined thread could show up in the
3414 threading.enumerate() list after the join() for a brief period until
3421 - Patch #2274: Add heapq.heappushpop().
3423 - Add inspect.isabstract(object) to fix bug #2223
3425 - Add a __format__ method to Decimal, to support PEP 3101.
3427 - Add a timing parameter when using trace.Trace to print out
3430 - Issue #1627: httplib now ignores negative Content-Length headers.
3432 - Issue #900744: If an invalid chunked-encoding header is sent by a
3433 server, httplib will now raise IncompleteRead and close the
3434 connection instead of raising ValueError.
3436 - Issue #1492: The content type of BaseHTTPServer error messages can
3439 - Issue #1781: ConfigParser now does not let you add the "default" section
3442 - Removed uses of dict.has_key() from distutils, and uses of
3443 callable() from copy_reg.py, so the interpreter now starts up
3444 without warnings when '-3' is given. More work like this needs to
3445 be done in the rest of the stdlib.
3447 - Issue #1916: added isgenerator() and isgeneratorfunction() to
3450 - Issue #1224: Fixed bad url parsing when path begins with double
3453 - ctypes instances that are not or do not contain pointers can now be
3456 - Patch #1966: Break infinite loop in httplib when the servers
3457 implements the chunked encoding incorrectly.
3459 - Rename rational.py to fractions.py and the rational.Rational class
3460 to fractions.Fraction, to avoid the name clash with the abstract
3461 base class numbers.Rational. See discussion in issue #1682.
3463 - The pickletools module now provides an optimize() function that
3464 eliminates unused PUT opcodes from a pickle string.
3466 - Patch #2021: Allow tempfile.NamedTemporaryFile and
3467 SpooledTemporaryFile to be used in with statements by correctly
3468 supporting the context management protocol.
3470 - Patch #1979: Add rich comparisons to Decimal, and make Decimal
3471 comparisons involving a NaN follow the IEEE 754 standard.
3473 - Issue #2004: tarfile.py: Use mode 0700 for temporary directories and
3474 default permissions for missing directories.
3476 - Issue #175006: The debugger used to skip the condition of a "while"
3477 statement after the first iteration. Now it correctly steps on the
3478 expression, and breakpoints on the "while" statement are honored on
3481 - Issue #1765140: add an optional delay argument to FileHandler and
3482 its subclasses. Defaults to false (existing behaviour), but if true,
3483 defers opening the file until the first call to emit().
3485 - The pprint module now supports sets and frozensets.
3487 - Issue #1221598: add optional callbacks to ftplib.FTP's storbinary()
3488 and storlines() methods. (Contributed by Phil Schwartz)
3490 - Issue #1715: include sub-extension modules in pydoc's text output.
3492 - Issue #1836: fix an off-by-one bug in TimedRotatingHandler's
3493 rollover time calculation.
3495 - Issue #1021: fix a bug to allow basicConfig to accept NOTSET as a
3498 - Issue #932563: add LoggerAdapter convenience class to make it easier
3499 to add contextual information in logging output.
3501 - Issue #1760556: fix a bug to avoid FileHandler throwing an exception
3504 - Bug #1530959: distutils' build command now uses different build
3505 directory when building extension modules against versions of Python
3506 compiled with ``--with-pydebug``.
3508 - Issue #1555501: move plistlib from plat-mac directory to general
3511 - Issue #1269: fix a bug in pstats.add_callers() and add a unit test
3514 - Issue #1669: don't allow shutil.rmtree() to be called on a symlink
3517 - Issue #1664522: in urllib, don't read non-existing directories in
3518 ftp mode, returning a 0-byte file -- raise an IOError instead.
3520 - Issue #856047: respect the ``no_proxy`` environment variable when
3521 using the ``http_proxy`` etc. environment variables in urllib.
3523 - Issue #1178141: add a getcode() method to the addinfourls that
3524 urllib.open() returns so that you can retrieve the HTTP status code.
3526 - Issue #1003: Fix zipfile decryption check, it would fail zip files
3527 with extended local headers.
3529 - Issue #1189216: Fix the zipfile module to work on archives with
3530 headers past the 2**31 byte boundary.
3532 - Issue #1336: fix a race condition in subprocess.Popen if the garbage
3533 collector kicked in at the wrong time that would cause the process
3534 to hang when the child wrote to stderr.
3536 - Issue #1146: fix how textwrap breaks a long word that would start in
3537 the last column of a line.
3539 - Issue #1693149: trace.py --ignore-module - accept multiple
3540 comma-separated modules to be given.
3542 - Issue #1822: MIMEMultipart.is_multipart() behaves correctly for a
3543 just-created (and empty) instance. Thanks Jonathan Share.
3545 - Issue #1861: Added an attribute to the sched module which returns an
3546 ordered list of upcoming events (displayed as named tuples).
3548 - Issue #1837: The queue module now also supports a LIFO queue and a
3551 - Patch #1048820: Add insert-mode editing to curses.textpad.Textbox
3552 (patch by Stefan Wehr). Also, fix an off-by-one bug in
3555 - Issue #1831: ctypes now raises a TypeError if conflicting positional
3556 and named arguments are passed to a Structure or Union initializer.
3557 When too many positional arguments are passed, also a TypeError is
3558 raised instead of a ValueError.
3560 - Convert the internal ctypes array type cache to a WeakValueDict so
3561 that array types do not live longer than needed.
3563 - Issue #1786: pdb should use its own stdin/stdout around an exec call
3564 and when creating a recursive instance.
3566 - Issue #1698398: ZipFile.printdir() crashed because the format string
3567 expected a tuple type of length six instead of time.struct_time
3570 - Issue #1780: The Decimal constructor now accepts arbitrary leading
3571 and trailing whitespace when constructing from a string.
3572 Context.create_decimal no longer accepts trailing newlines.
3574 - Decimal.as_tuple(), difflib.find_longest_match() and inspect
3575 functions that returned a tuple now return a named tuple.
3577 - Doctest now returns results as a named tuple for readability:
3578 (0, 7) --> TestResults(failed=0, attempted=7)
3580 - Issue #846388:q re.match is interruptible now, which is particularly
3581 good for long regular expression matches.
3583 - Patch #1137: allow setting buffer_size attribute on pyexpat Parser
3584 objects to set the character data buffer size.
3586 - Issue #1757: The hash of a Decimal instance is no longer affected by
3587 the current context.
3589 - Patch #467924: add ZipFile.extract() and ZipFile.extractall() in the
3592 - Issue #1646: Make socket support the TIPC protocol.
3594 - Bug #1742: return os.curdir from os.path.relpath() if both arguments
3595 are equal instead of raising an exception.
3597 - Patch #1637: fix urlparse for URLs like 'http://x.com?arg=/foo'.
3599 - Patch #1698: allow '@' in username parsed by urlparse.py.
3601 - Issue #1735: TarFile.extractall() now correctly sets directory
3602 permissions and times.
3604 - Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a mountpoint.
3606 - Bug #1687: Fxed plistlib.py restricts <integer> to Python int when
3609 - Issue #1700: Regular expression inline flags incorrectly handle
3610 certain unicode characters.
3612 - Issue #1689: PEP 3141, numeric abstract base classes.
3614 - Tk issue #1851526: Return results from Python callbacks to Tcl as
3617 - Issue #1642: Fix segfault in ctypes when trying to delete attributes.
3619 - Issue #1727780: Support loading pickles of random.Random objects
3620 created on 32-bit systems on 64-bit systems, and vice versa. As a
3621 consequence of the change, Random pickles created by Python 2.6
3622 cannot be loaded in Python 2.5.
3624 - Issue #1455: The distutils package now supports VS 2005 and VS 2008
3625 for both the msvccompiler and cygwincompiler.
3627 - Issue #1531: tarfile.py: Read fileobj from the current offset, do
3628 not seek to the start.
3630 - Issue #1534: Added a dictionary sys.float_info with information
3631 about the internal floating point type to the sys module.
3633 - Issue #1429818: patch for trace and doctest modules so they play
3636 - doctest made a bad assumption that a package's __loader__.get_data()
3637 method used universal newlines.
3639 - Issue #1705170: contextlib.contextmanager was still swallowing
3640 StopIteration in some cases. This should no longer happen.
3642 - Issue #1292: On alpha, arm, ppc, and s390 linux systems the
3643 --with-system-ffi configure option defaults to "yes".
3645 - IN module for FreeBSD 8 is added and preexisting FreeBSD 6 and 7
3648 - Issues #1181, #1287: unsetenv() is now called when the
3649 os.environ.pop() and os.environ.clear() methods are used.
3651 - ctypes will now work correctly on 32-bit systems when Python is
3652 configured with --with-system-ffi.
3654 - Patch #1203: ctypes now does work on OS X when Python is built with
3655 --disable-toolbox-glue.
3657 - collections.deque() now supports a "maxlen" argument.
3659 - itertools.count() is no longer bounded to LONG_MAX. Formerly, it
3660 raised an OverflowError. Now, automatically shifts from ints to
3663 - Added itertools.product() which forms the Cartesian product of the
3666 - Added itertools.combinations() and itertools.permutations().
3668 - Patch #1541463: optimize performance of cgi.FieldStorage operations.
3670 - Decimal is fully updated to the latest Decimal Specification
3673 - Bug #1153: repr.repr() now doesn't require set and dictionary items
3674 to be orderable to properly represent them.
3676 - A 'c_longdouble' type was added to the ctypes module.
3678 - Bug #1709599: Run test_1565150 only if the file system is NTFS.
3680 - When encountering a password-protected robots.txt file the
3681 RobotFileParser no longer prompts interactively for a username and
3682 password (bug 813986).
3684 - TarFile.__init__() no longer fails if no name argument is passed and
3685 the fileobj argument has no usable name attribute (e.g. StringIO).
3687 - The functools module now provides 'reduce', for forward
3688 compatibility with Python 3000.
3690 - Server-side SSL support and cert verification added, by Bill
3693 - socket.ssl deprecated; use new ssl module instead.
3695 - uuid creation is now threadsafe.
3697 - EUC-KR codec now handles the cheot-ga-keut composed make-up hangul
3700 - GB18030 codec now can encode additional two-byte characters that are
3703 - Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
3705 - Bug #1704793: Return UTF-16 pair if unicodedata.lookup cannot
3706 represent the result in a single character.
3708 - Bug #978833: Close https sockets by releasing the _ssl object.
3710 - Change location of the package index to pypi.python.org/pypi
3712 - Bug #1701409: Fix a segfault in printing ctypes.c_char_p and
3713 ctypes.c_wchar_p when they point to an invalid location. As a
3714 sideeffect the representation of these instances has changed.
3716 - tarfile.py: Added "exclude" keyword argument to TarFile.add().
3718 - Bug #1734723: Fix repr.Repr() so it doesn't ignore the maxtuple
3721 - The urlopen function of urllib2 now has an optional timeout
3722 parameter (note that it actually works with HTTP, HTTPS, FTP and
3725 - In ftplib, the FTP.ntransfercmd method, when in passive mode, now
3726 uses the socket.create_connection function, using the timeout
3727 specified at connection time.
3729 - Bug #1728403: Fix a bug that CJKCodecs StreamReader hangs when it
3730 reads a file that ends with incomplete sequence and sizehint
3731 argument for .read() is specified.
3733 - Bug #1730389: Change time.strptime() to use ``\s+`` instead of
3734 ``\s*`` when matching spaces in the specified format argument.
3736 - Bugs #1668596/#1720897: distutils now copies data files even if
3737 package_dir is empty.
3739 - sha now raises a DeprecationWarning upon import.
3741 - md5 now raises a DeprecationWarning upon import.
3743 - Issue #1385: The hmac module now computes the correct hmac when
3744 using hashes with a block size other than 64 bytes (such as sha384
3747 - mimify now raises a DeprecationWarning upon import.
3749 - MimeWriter now raises a DeprecationWarning upon import.
3751 - tarfile.py: Improved unicode support. Unicode input names are now
3752 officially supported. Added "errors" argument to the TarFile class.
3754 - urllib.ftpwrapper class now accepts an optional timeout.
3756 - shlex.split() now has an optional "posix" parameter.
3758 - The posixfile module now raises a DeprecationWarning.
3760 - Remove the gopherlib module. This also leads to the removal of
3761 gopher support in urllib/urllib2.
3763 - Fix bug in marshal where bad data would cause a segfault due to lack
3764 of an infinite recursion check.
3766 - Removed plat-freebsd2 and plat-freebsd3 directories (and IN.py in
3769 - HTML-escape the plain traceback in cgitb's HTML output, to prevent
3770 the traceback inadvertently or maliciously closing the comment and
3771 injecting HTML into the error page.
3773 - The popen2 module and os.popen* are deprecated. Use the subprocess
3776 - Added an optional credentials argument to SMTPHandler, for use with
3777 SMTP servers which require authentication.
3779 - Patch #1695948: Added optional timeout parameter to SocketHandler.
3781 - Bug #1652788: Minor fix for currentframe.
3783 - Patch #1598415: Added WatchedFileHandler to better support external
3784 log file rotation using e.g. newsyslog or logrotate. This handler is
3785 only useful in Unix/Linux environments.
3787 - Bug #1706381: Specifying the SWIG option "-c++" in the setup.py file
3788 (as opposed to the command line) will now write file names ending in
3791 - As specified in RFC 2616, an HTTP response like 2xx indicates that
3792 the client's request was successfully received, understood, and
3793 accepted. Now in these cases no error is raised in urllib (issue
3796 - Bug #1290505: time.strptime's internal cache of locale information
3797 is now properly recreated when the locale is changed.
3799 - Patch #1685563: remove (don't add) duplicate paths in
3800 distutils.MSVCCompiler.
3802 - Added a timeout parameter to the constructor of other protocols
3803 (telnetlib, ftplib, smtplib and poplib). This is second part of the
3804 work started with create_connection() and timeout in httplib, and
3805 closes patch #723312.
3807 - Patch #1676823: Added create_connection() to socket.py, which may be
3808 called with a timeout, and use it from httplib (whose HTTPConnection
3809 and HTTPSConnection now accept an optional timeout).
3811 - Bug #978833: Revert r50844, as it broke _socketobject.dup.
3813 - Bug #1675967: re patterns pickled with Python 2.4 and earlier can
3814 now be unpickled with Python 2.5 and newer.
3816 - Patch #1630118: add a SpooledTemporaryFile class to tempfile.py.
3818 - Patch #1273829: os.walk() now has a "followlinks" parameter. If set
3819 to True (which is not the default), it visits symlinks pointing to
3822 - Bug #1681228: the webbrowser module now correctly uses the default
3823 GNOME or KDE browser, depending on whether there is a session of one
3824 of those present. Also, it tries the Windows default browser before
3825 trying Mozilla variants.
3827 - Patch #1339796: add a relpath() function to os.path.
3829 - Patch #1681153: the wave module now closes a file object it opened if
3830 initialization failed.
3832 - Bug #767111: fix long-standing bug in urllib which caused an
3833 AttributeError instead of an IOError when the server's response
3834 didn't contain a valid HTTP status line.
3836 - Patch #957650: "%var%" environment variable references are now
3837 properly expanded in ntpath.expandvars(), also "~user" home
3838 directory references are recognized and handled on Windows.
3840 - Patch #1429539: pdb now correctly initializes the __main__ module
3841 for the debugged script, which means that imports from __main__ work
3844 - The nonobvious commands.getstatus() function is now deprecated.
3846 - Patch #1393667: pdb now has a "run" command which restarts the
3847 debugged Python program, optionally with different arguments.
3849 - Patch #1649190: Adding support for _Bool to ctypes as c_bool.
3851 - Patch #1530482: add pydoc.render_doc() which returns the
3852 documentation for a thing instead of paging it to stdout, which
3855 - Patch #1533909: the timeit module now accepts callables in addition
3856 to strings for the code to time and the setup code. Also added two
3857 convenience functions for instantiating a Timer and calling its
3860 - Patch #1537850: tempfile.NamedTemporaryFile now has a "delete"
3861 parameter which can be set to False to prevent the default
3862 delete-on-close behavior.
3864 - Patch #1581073: add a flag to textwrap that prevents the dropping of
3865 whitespace while wrapping.
3867 - Patch #1603688: ConfigParser.SafeConfigParser now checks values that
3868 are set for invalid interpolation sequences that would lead to
3869 errors on reading back those values.
3871 - Added support for the POSIX.1-2001 (pax) format to
3872 tarfile.py. Extended and cleaned up the test suite. Added a new
3875 - Patch #1449244: Support Unicode strings in
3876 email.message.Message.{set_charset,get_content_charset}.
3878 - Patch #1542681: add entries for "with", "as" and "CONTEXTMANAGERS"
3879 to pydoc's help keywords.
3881 - Patch #1555098: use str.join() instead of repeated string
3882 concatenation in robotparser.
3884 - Patch #1635454: the csv.DictWriter class now includes the offending
3885 field names in its exception message if you try to write a record
3886 with a dictionary containing fields not in the CSV field names list.
3888 - Patch #1668100: urllib2 now correctly raises URLError instead of
3889 OSError if accessing a local file via the file:// protocol fails.
3891 - Patch #1677862: Require a space or tab after import in .pth files.
3893 - Patch #1192590: Fix pdb's "ignore" and "condition" commands so they
3894 trap the IndexError caused by passing in an invalid breakpoint
3897 - Patch #1599845: Add an option to disable the implicit calls to
3898 server_bind() and server_activate() in the constructors for
3899 TCPServer, SimpleXMLRPCServer and DocXMLRPCServer.
3901 - Bug #1531963: Make SocketServer.TCPServer's server_address always be
3902 equal to calling getsockname() on the server's socket. Fixed by
3905 - Patch #742598: Add .timeout attribute to SocketServer that calls
3906 .handle_timeout() when no requests are received.
3908 - Bug #1651235: When a tuple was passed to a ctypes function call,
3909 Python would crash instead of raising an error.
3911 - Bug #1646630: ctypes.string_at(buf, 0) and ctypes.wstring_at(buf, 0)
3912 returned string up to the first NUL character.
3914 - Patch #957003: Implement smtplib.LMTP.
3916 - Patch #1481079: add support for HTTP_REFERER to CGIHTTPServer.
3918 - Patch #1675424: Added tests for uncovered code in the zipfile
3919 module. The KeyError raised by Zipfile.getinfo for nonexistent
3920 names now has a descriptive message.
3922 - Bug #1115886: os.path.splitext('.cshrc') gives now ('.cshrc', '').
3924 - unittest now verifies more of its assumptions. In particular,
3925 TestCase and TestSuite subclasses (not instances) are no longer
3926 accepted in TestSuite.addTest(). This should cause no
3927 incompatibility since it never made sense with ordinary subclasses
3928 -- the failure just occurred later, with a more cumbersome
3931 - Patch #787789: allow to pass custom TestRunner instances to
3932 unittest's main() function.
3934 - Patches #1550273, #1550272: fix a few bugs in unittest and add a
3935 comprehensive test suite for the module.
3937 - Patch #1001604: glob.glob() now returns unicode filenames if it was
3938 given a unicode argument and os.listdir() returns unicode filenames.
3940 - Patch #1673619: setup.py identifies extension modules it doesn't
3941 know how to build and those it knows how to build but that fail to
3944 - Patch #912410: Replace HTML entity references for attribute values
3947 - Patch #1663234: you can now run doctest on test files and modules
3948 using "python -m doctest [-v] filename ...".
3950 - Patch #1121142: Implement ZipFile.open.
3952 - Taught setup.py how to locate Berkeley DB on Macs using MacPorts.
3954 - Added heapq.merge() for merging sorted input streams.
3956 - Added collections.namedtuple() for assigning field names to tuples.
3958 - Added itertools.izip_longest().
3960 - Have the encoding package's search function dynamically import using
3961 absolute import semantics.
3963 - Patch #1647484: Renamed GzipFile's filename attribute to name.
3965 - Patch #1517891: Mode 'a' for ZipFile now creates the file if it
3968 - Patch #698833: Support file decryption in zipfile.
3970 - Patch #685268: Consider a package's __path__ in imputil.
3972 - Patch #1463026: Support default namespace in XMLGenerator.
3974 - Patch #1571379: Make trace's --ignore-dir facility work in the face
3975 of relative directory names.
3977 - Bug #1600860: Search for shared python library in LIBDIR, not
3978 lib/python/config, on "linux" and "gnu" systems.
3980 - Patch #1652681: tarfile.py: create nonexistent files in append mode
3981 and allow appending to empty files.
3983 - Bug #1124861: Automatically create pipes if GetStdHandle fails in
3986 - Patch #1634778: add missing encoding aliases for iso8859_15 and
3989 - Patch #1638243: the compiler package is now able to correctly
3990 compile a with statement; previously, executing code containing a
3991 with statement compiled by the compiler package crashed the
3994 - Bug #1643943: Fix time.strptime's support for the %U directive.
3996 - Patch #1507247: tarfile.py: use current umask for intermediate
3999 - Patch #1627441: close sockets properly in urllib2.
4001 - Bug #494589: make ntpath.expandvars behave according to its
4004 - Changed platform module API python_version_tuple() to actually
4005 return a tuple (it used to return a list).
4007 - Added new platform module APIs python_branch(), python_revision(),
4008 python_implementation() and linux_distribution().
4010 - Added support for IronPython and Jython to the platform module.
4012 - The sets module has been deprecated. Use the built-in set/frozenset
4015 - Bug #1610795: make ctypes.util.find_library work on BSD systems.
4017 - Fixes for 64-bit Windows: In ctypes.wintypes, correct the
4018 definitions of HANDLE, WPARAM, LPARAM data types. Make
4019 parameterless foreign function calls work.
4021 - The version number of the ctypes package changed to "1.1.0".
4023 - Bug #1627575: logging: Added _open() method to FileHandler which can
4024 be used to reopen files. The FileHandler instance now saves the
4025 encoding (which can be None) in an attribute called "encoding".
4027 - Bug #411881: logging.handlers: bare except clause removed from
4028 SMTPHandler.emit. Now, only ImportError is trapped.
4030 - Bug #411881: logging.handlers: bare except clause removed from
4031 SocketHandler.createSocket. Now, only socket.error is trapped.
4033 - Bug #411881: logging: bare except clause removed from
4034 LogRecord.__init__. Now, only ValueError, TypeError and
4035 AttributeError are trapped.
4037 - Patch #1504073: Fix tarfile.open() for mode "r" with a fileobj
4040 - Patch #1182394 from Shane Holloway: speed up HMAC.hexdigest.
4042 - Patch #1262036: Prevent TarFiles from being added to themselves
4043 under certain conditions.
4045 - Patch #1230446: tarfile.py: fix ExFileObject so that read() and
4046 tell() work correctly together with readline().
4048 - Patch #1484695: The tarfile module now raises a HeaderError
4049 exception if a buffer given to frombuf() is invalid.
4051 - Bug #1503765: Fix a problem in logging.config with spaces in comma-
4052 separated lists read from logging config files.
4054 - Patch #1604907: Fix problems in logging.handlers caused at logging
4055 shutdown when syslog handlers fail to initialize because of syslogd
4058 - Patch #1608267: fix a race condition in os.makedirs() if the
4059 directory to be created is already there.
4061 - Patch #1610437: fix a tarfile bug with long filename headers.
4063 - Patch #1371075: Make ConfigParser accept optional dict type for
4064 ordering, sorting, etc.
4066 - Bug #1563807: _ctypes built on AIX fails with ld ffi error.
4068 - Bug #1598620: A ctypes Structure cannot contain itself.
4070 - Patch #1070046: Marshal new-style objects like InstanceType in
4073 - cStringIO.truncate(-1) now raises an IOError, like StringIO and
4076 - Patch #1472877: Fix Tix subwidget name resolution.
4078 - Patch #1594554: Always close a tkSimpleDialog on ok(), even if an
4081 - Patch #1538878: Don't make tkSimpleDialog dialogs transient if the
4082 parent window is withdrawn.
4084 - Bug #1597824: return the registered function from atexit.register()
4085 to facilitate usage as a decorator.
4087 - Patch #1360200: Use unmangled_version RPM spec field to deal with
4090 - Patch #1359217: Process 2xx response in an ftplib transfer that
4091 precedes an 1xx response.
4093 - Patch #1355023: support whence argument for GzipFile.seek.
4095 - Patch #1065257: Support passing open files as body in
4096 HTTPConnection.request().
4098 - Bug #1569790: mailbox.py: Maildir.get_folder() and MH.get_folder()
4099 weren't passing the message factory on to newly created Maildir/MH
4102 - Patch #1514543: mailbox.py: In the Maildir class, report errors if
4103 there's a filename clash instead of possibly losing a message.
4104 (Patch by David Watson.)
4106 - Patch #1514544: Try to ensure that messages/indexes have been
4107 physically written to disk after calling .flush() or
4108 .close(). (Patch by David Watson.)
4110 - Patch #1592250: Add elide argument to Tkinter.Text.search.
4112 - Patch #838546: Make terminal become controlling in pty.fork().
4114 - Patch #1351744: Add askyesnocancel helper for tkMessageBox.
4116 - Patch #1060577: Extract list of RPM files from spec file in
4119 - Bug #1586613: fix zlib and bz2 codecs' incremental en/decoders.
4121 - Patch #1583880: fix tarfile's problems with long names and posix/
4124 - Bug #1586448: the compiler module now emits the same bytecode for
4125 list comprehensions as the builtin compiler, using the LIST_APPEND
4128 - Fix codecs.EncodedFile which did not use file_encoding in 2.5.0, and
4129 fix all codecs file wrappers to work correctly with the "with"
4130 statement (bug #1586513).
4132 - Lib/modulefinder.py now handles absolute and relative imports
4135 - Patch #1567274: Support SMTP over TLS.
4137 - Patch #1560695: Add .note.GNU-stack to ctypes' sysv.S so that ctypes
4138 isn't considered as requiring executable stacks.
4140 - ctypes callback functions only support 'fundamental' data types as
4141 result type. Raise an error when something else is used. This is a
4142 partial fix for Bug #1574584.
4144 - Fix turtle so that time.sleep is imported for the entire library.
4145 Allows the demo2 function to be executed on its own instead of only
4146 when the module is run as a script.
4148 - Bug #813342: Start the IDLE subprocess with -Qnew if the parent is
4149 started with that option.
4151 - Bug #1565150: Fix subsecond processing for os.utime on Windows.
4153 - Support for MSVC 8 was added to bdist_wininst.
4155 - Bug #1446043: correctly raise a LookupError if an encoding name
4156 given to encodings.search_function() contains a dot.
4158 - Bug #1560617: in pyclbr, return full module name not only for
4159 classes, but also for functions.
4161 - Bug #1457823: cgi.(Sv)FormContentDict's constructor now takes
4162 keep_blank_values and strict_parsing keyword arguments.
4164 - Bug #1566602: correct failure of posixpath unittest when $HOME ends
4167 - Bug #1565661: in webbrowser, split() the command for the default
4168 GNOME browser in case it is a command with args.
4170 - Made the error message for time.strptime when the data and
4171 format do match be more clear.
4173 - Fix a bug in traceback.format_exception_only() that led to an error
4174 being raised when print_exc() was called without an exception set.
4175 In version 2.4, this printed "None", restored that behavior.
4177 - Make webbrowser.BackgroundBrowser usable in Windows (it wasn't
4178 because the close_fds arg to subprocess.Popen is not supported).
4180 - Reverted patch #1504333 to sgmllib because it introduced an infinite
4183 - Patch #1553314: Fix the inspect.py slowdown that was hurting IPython
4184 & SAGE by adding smarter caching in inspect.getmodule()
4186 - Fix missing import of the types module in logging.config.
4188 - Patch #1550886: Fix decimal module context management implementation
4189 to match the localcontext() example from PEP 343.
4191 - Bug #1545341: The 'classifier' keyword argument to the Distutils
4192 setup() function now accepts tuples as well as lists.
4194 - Bug #1541863: uuid.uuid1 failed to generate unique identifiers on
4195 systems with low clock resolution.
4197 - Bug #1531862: Do not close standard file descriptors in subprocess.
4199 - idle: Honor the "Cancel" action in the save dialog (Debian bug
4202 - Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
4203 the first chunk fed to the decoder started with a BOM, but was
4204 longer than 3 bytes.
4206 - The implementation of UnicodeError objects has been simplified
4207 (start and end attributes are now stored directly as Py_ssize_t
4210 - Issue #829951: In the smtplib module, SMTP.starttls() now complies
4211 with RFC 3207 and forgets any knowledge obtained from the server not
4212 obtained from the TLS negotiation itself. Patch contributed by Bill
4215 - Issue #1339: The smtplib.SMTP class has been refactored a bit such
4216 that the SMTP.starttls() caller no longer needs to call ehlo()
4217 beforehand. SMTP.starttls() now raises an exception of the server
4218 does not claim to support starttls. Adds the
4219 SMTP.ehlo_or_helo_if_needed() method. Patch contributed by Bill
4222 - Patch #1089358: Add signal.siginterrupt, a wrapper around
4228 - Patch #1657: added select.epoll and select.kqueue.
4230 - Patch #1506171: added operator.methodcaller().
4232 - Patch #1826: operator.attrgetter() now supports dotted attribute paths.
4234 - Patch #1957: syslogmodule: Release GIL when calling syslog(3).
4236 - Bug #2112: mmap.error is now a subclass of EnvironmentError and not
4237 a direct EnvironmentError.
4239 - Bug #2111: mmap segfaults when trying to write a block opened with
4242 - Bug #2063: correct order of utime and stime in os.times() result on
4245 - Patch #1736: Fix file name handling of _msi.FCICreate.
4247 - Updated ``big5hkscs`` codec to the HKSCS revision of 2004.
4249 - Issue #1940: make it possible to use curses.filter() before
4250 curses.initscr() as the documentation says.
4252 - Backport of _fileio module from Python 3.0.
4254 - Patch #1087741: mmap.mmap is now a class, not a factory function. It
4255 is also subclassable now.
4257 - Patch #1648: added ``sys.getprofile()`` and ``sys.gettrace()``.
4259 - Patch #1663329: added ``os.closerange()`` function to quickly close
4260 a range of file descriptors without considering errors.
4262 - Patch #976880: ``mmap`` objects now have an ``rfind`` method that
4263 works as expected. ``mmap.find`` also takes an optional ``end``
4266 - _winreg's HKEY object has gained __enter__ and __exit__ methods to
4267 support the context manager protocol. The _winreg module also
4268 gained a new function ``ExpandEnvironmentStrings`` to expand
4271 - itertools.starmap() now accepts any iterable input. Previously, it
4272 required the function inputs to be tuples.
4274 - itertools.chain() now has an alternate constructor,
4275 chain.from_iterable().
4277 - Issue #1646: Make socket support TIPC. The socket module now has
4278 support for TIPC under Linux, see http://tipc.sf.net/ for more
4281 - Added interface for Windows' WSAIoctl to socket object and added an
4282 example for a simple network sniffer.
4284 - Bug #1301: Bad assert in _tkinter fixed.
4286 - Added bdist_wininst executable for VS 2008.
4288 - Bug #1604: collections.deque.__init__(iterable) now clears any prior
4289 contents before adding elements from the iterable. This fix brings
4290 the behavior into line with that for list.__init__().
4292 - Added wide char functions to msvcrt module: getwch, getwche, putwch
4293 and ungetwch. The functions accept or return unicode.
4295 - os.access now returns True on Windows for any existing directory.
4297 - Added warnpy3k function to the warnings module.
4299 - Marshal.dumps() now expects exact type matches for int, long, float,
4300 complex, tuple, list, dict, set, and frozenset. Formerly, it would
4301 silently miscode subclasses of those types. Now, it raises a
4304 - Patch #1388440: Add set_completion_display_matches_hook and
4305 get_completion_type to readline.
4307 - Bug #1649098: Avoid declaration of zero-sized array declaration in
4310 - Removed the rgbimg module; been deprecated since Python 2.5.
4312 - Bug #1721309: prevent bsddb module from freeing random memory.
4314 - Bug #1233: fix bsddb.dbshelve.DBShelf append method to work as
4315 intended for RECNO databases.
4317 - pybsddb.sf.net Bug #477182: Load the database flags at database open
4318 time so that opening a database previously created with the DB_DUP
4319 or DB_DUPSORT flag set will keep the proper behavior on subsequent
4320 opens. Specifically: dictionary assignment to a DB object will
4321 replace all values for a given key when the database allows
4322 duplicate values. DB users should use DB.put(k, v) when they want
4323 to store duplicates; not DB[k] = v.
4325 - Add the bsddb.db.DBEnv.lock_id_free method.
4327 - Bug #1686475: Support stat'ing open files on Windows again.
4329 - Patch #1185447: binascii.b2a_qp() now correctly quotes binary
4330 characters with ASCII value less than 32. Also, it correctly quotes
4331 dots only if they occur on a single line, as opposed to the previous
4332 behavior of quoting dots if they are the second character of any
4335 - Bug #1622896: fix a rare corner case where the bz2 module raised an
4336 error in spite of a succesful compression.
4338 - Patch #1654417: make operator.{get,set,del}slice use the full range
4341 - Patch #1646728: datetime.fromtimestamp fails with negative
4342 fractional times. With unittest.
4344 - Patch #1490190: posixmodule now includes os.chflags() and
4345 os.lchflags() functions on platforms where the underlying system
4346 calls are available.
4348 - Patch #1494140: Add documentation for the new struct.Struct object.
4350 - Patch #1432399: Support the HCI protocol for bluetooth sockets
4352 - Patch #1657276: Make NETLINK_DNRTMSG conditional.
4354 - Bug #1653736: Complain about keyword arguments to time.isoformat.
4356 - Bug #1486663: don't reject keyword arguments for subclasses of
4359 - Patch #1610575: The struct module now supports the 't' code, for C99
4362 - Patch #1635058: ensure that htonl and friends never accept or return
4363 negative numbers, per the underlying C implementation.
4365 - Patch #1544279: Improve thread-safety of the socket module by moving
4366 the sock_addr_t storage out of the socket object.
4368 - Patch #1019808: fix bug that causes an incorrect error to be
4369 returned when a socket timeout is set and a connection attempt
4372 - Speed up function calls into the math module.
4374 - Bug #1588217: don't parse "= " as a soft line break in binascii's
4375 a2b_qp() function, instead leave it in the string as quopri.decode()
4378 - Bug #1599782: Fix segfault on bsddb.db.DB().type().
4380 - Bug #1567666: Emulate GetFileAttributesExA for Win95.
4382 - Patch #1576166: Support os.utime for directories on Windows NT+.
4384 - Patch #1572724: fix typo ('=' instead of '==') in _msi.c.
4386 - Bug #1572832: fix a bug in ISO-2022 codecs which may cause segfault
4387 when encoding non-BMP unicode characters.
4389 - Bug #1556784: allow format strings longer than 127 characters in
4390 datetime's strftime function.
4392 - Fix itertools.count(n) to work with negative numbers again.
4394 - RLIMIT_SBSIZE was added to the resource module where available.
4396 - Bug #1551427: fix a wrong NULL pointer check in the win32 version of
4399 - Bug #1548092: fix curses.tparm seg fault on invalid input.
4401 - Patch #1114: fix curses module compilation on 64-bit AIX, & possibly
4402 other 64-bit LP64 platforms where attr_t is not the same size as a
4403 long. (Contributed by Luke Mewburn.)
4405 - Bug #1550714: fix SystemError from itertools.tee on negative value
4408 - Fixed a few bugs on cjkcodecs:
4409 - gbk and gb18030 codec now handle U+30FB KATAKANA MIDDLE DOT
4411 - iso2022_jp_2 codec now encodes into G0 for KS X 1001, GB2312
4412 codepoints to conform the standard.
4413 - iso2022_jp_3 and iso2022_jp_2004 codec can encode JIS X 0213:2
4416 - Bug #1552726: in readline.c, avoid repeatedly polling in interactive
4417 mode by only placing a timeout on the select() if an input hook has
4418 been defined. This prevents an interactive Python from waking up 10
4419 times per second. Patch by Richard Boulton.
4421 - fixed a bug with bsddb.DB.stat: the flags and txn keyword arguments
4424 - Added support for linking the bsddb module against BerkeleyDB 4.5.x,
4427 - Bug #1633621: if curses.resizeterm() or curses.resize_term() is
4428 called, update _curses.LINES, _curses.COLS, curses.LINES and
4431 - Fix an off-by-one bug in locale.strxfrm().
4433 - Fix libffi configure for hppa*-*-linux* | parisc*-*-linux*.
4435 - Build using system ffi library on arm*-linux*.
4437 - Bug #1372: zlibmodule.c: int overflow in PyZlib_decompress
4439 - bsddb module: Fix memory leak when using database cursors on
4440 databases without a DBEnv.
4442 - The sqlite3 module was updated to pysqlite 2.4.1.
4447 - Refactor test_logging to use unittest.
4449 - Refactor test_profile and test_cprofile to use the same code to
4452 - Make test_runpy reentrant by fixing _check_module to clear out any
4453 module being tested. Was causing an error by __import__ doing a
4454 reload on the second run and thus suppressing bytecode recreation.
4456 - Capture socket connection resets and timeouts in test_socket_ssl and
4457 test_urllib2net and raise test.test_support.ResourceDenied.
4459 - Patch #1559413: Fix test_cmd_line if sys.executable contains a
4462 - Added test.test_support.TransientResource which is a context manager
4463 to surround calls to resources that are not guaranteed to work even
4464 if test.test_support.requires says that the resource should exist.
4466 - Added a test for slicing of an exception.
4468 - Added test.test_support.EnvironmentVarGuard. It's a class that
4469 provides a context manager so that one can temporarily set or unset
4470 environment variables.
4472 - Added some tests for modulefinder.
4474 - Converted test_imp to use unittest.
4476 - Fix bsddb test_basics.test06_Transactions to check the version
4479 - test.test_support.catch_warning is a new context manager that can be
4480 used to catch the warnings issued by the warning framework.
4485 - Tools/scripts/reindent.py now creates the backup file using
4486 shutil.copy to preserve user/group and permissions. Added also a
4487 --nobackup option to not create the backup if the user is concerned
4488 regarding this. Check issue 1050828 for more details.
4490 - Tools/scripts/win_add2path.py was added. The simple script modifes
4491 the PATH environment var of the HKCU tree and adds the python bin
4492 and script directory.
4494 - Tools/18n/pygettext.py was added to the list of scripts installed by
4495 Tools/scripts/setup.py (tracker item 642309).
4497 - Added IronPython and Jython support to pybench (part of which was
4500 - Made some minor changes to pybench output to allow the user to see
4501 which Python version is running pybench.
4503 - Added support for the new platform module feature
4504 platform.python_implementation(); this will now be saved in the
4511 - RFE #1765140: Updated documentation on FileHandler and subclasses to
4512 include new optional delay argument.
4514 - Bug #932563: Added section on getting contextual information into
4515 logging output, and added documentation for the new LoggerAdapter
4518 - Bug #1295: Added information about caching of formatted exception
4519 information in the LogRecord by Formatter.format().
4521 - Bug #1637365: add subsection about "__name__ == __main__" to the
4524 - Patch #1698768: updated the "using Python on the Mac" intro.
4526 - Bug #1569057: Document that calling file.next() when the file is
4527 open for writing is undefined.
4529 - Patch #1489771: the syntax rules in Python Reference Manual were
4530 updated to reflect the current Python syntax.
4532 - Patch #1686451: Fix return type for
4533 PySequence_{Count,Index,Fast_GET_SIZE}.
4535 - Patch #1679379: add documentation for fnmatch.translate().
4537 - Bug #1629566: clarify the docs on the return values of parsedate()
4538 and parsedate_tz() in email.utils and rfc822.
4540 - Patch #1671450: add a section about subclassing builtin types to the
4541 "extending and embedding" tutorial.
4543 - Bug #1629125: fix wrong data type (int -> Py_ssize_t) in PyDict_Next
4546 - Bug #1565919: document set types in the Language Reference.
4548 - Bug #1546052: clarify that PyString_FromString(AndSize) copies the
4549 string pointed to by its parameter.
4551 - Bug #1566663: remove obsolete example from datetime docs.
4553 - Bug #1541682: Fix example in the "Refcount details" API docs.
4554 Additionally, remove a faulty example showing PySequence_SetItem
4555 applied to a newly created list object and add notes that this isn't
4562 - Patch #1552024: add decorator support to unparse.py demo script.
4564 - Make auto-generated python.vim file list built-ins and exceptions in
4565 alphatbetical order. Makes output more deterministic and easier to
4566 tell if the file is stale or not.
4568 - Bug #1546372: Fixed small bugglet in pybench that caused a missing
4569 file not to get reported properly.
4575 - Have the search path for building extensions follow the declared
4576 order in $CPPFLAGS and $LDFLAGS when adding directories from those
4577 environment variables.
4579 - Bug #1983: Added a check to pyport to verify that sizeof(pid_t) is
4580 smaller or equal sizeof(long).
4582 - Bug #1234: Fixed semaphore errors on AIX 5.2
4584 - Issue #1726: Remove Python/atof.c from PCBuild/pythoncore.vcproj.
4586 - Removed PCbuild8/ directory and added a new build directory for VS
4587 2005 based on the VS 2008 build directory to PC/VS8.0. The script
4588 PCbuild/vs8to9.py was added to sync changes from PCbuild to
4591 - Moved PCbuild/ directory for VS 2003 to PC/VS7.1 and renamed
4592 PCBuild9/ directory to PCBuild/.
4594 - Bug #1699: Define _BSD_SOURCE only on OpenBSD.
4596 - Bug #1608: use -fwrapv when GCC supports it. This is important,
4597 newer GCC versions may optimize away overflow buffer overflow checks
4598 without this option!
4600 - Patch #1418: Make the AC_REPLACE_FUNCS object files actually work.
4602 - Add a FAST_LOOPS build option that speeds-up looping by trading away
4603 periodic threadstate and signal checking in tight loops. By
4604 default, this option is turned-off. It should only be enabled in
4605 debugged, performance critical applications.
4607 - Patch #786737: Allow building in a tree of symlinks pointing to a
4610 - Bug #1737210: Change Manufacturer of Windows installer to PSF.
4612 - Bug #1746880: Correctly install DLLs into system32 folder on Win64.
4614 - Define _BSD_SOURCE, to get access to POSIX extensions on OpenBSD
4617 - Stop supporting AtheOS and cause a build error in configure for the
4620 - Bug #1655392: don't add -L/usr/lib/pythonX.Y/config to the LDFLAGS
4621 returned by python-config if Python was built with --enable-shared
4622 because that prevented the shared library from being used.
4624 - Patch #1569798: fix a bug in distutils when building Python from a
4625 directory within sys.exec_prefix.
4627 - Bug #1675511: Use -Kpic instead of -xcode=pic32 on Solaris/x86.
4629 - Disable _XOPEN_SOURCE on NetBSD 1.x.
4631 - configure now checks whether gcc supports the PyArg_ParseTuple
4634 - Bug #1578513: Cross compilation was broken by a change to configure.
4635 Repair so that it's back to how it was in 2.4.3.
4637 - Patch #1576954: Update VC6 build directory; remove redundant files
4640 - Bug #1568842: Fix test for uintptr_t.
4642 - Patch #1540470: for OpenBSD 4.0.
4644 - Fix build failure on kfreebsd and on the hurd.
4646 - Fix the build of the library reference in info format.
4648 - Allow Emacs 22 for building the documentation in info format.
4650 - Makefile.pre.in(buildbottest): Run an optional script
4651 pybuildbot.identify to include some information about the build
4658 - Unified naming convention for free lists and their limits. All free
4659 lists in Object/ are named ``free_list``, the counter ``numfree``
4660 and the upper limit is a macro ``PyName_MAXFREELIST`` inside an
4663 - ``PySet_Add()`` can now modify a newly created frozenset. Similarly
4664 to ``PyTuple_SetItem``, it can be used to populate a brand new
4665 frozenset; but it does not steal a reference to the added item.
4667 - Added ``PySet_Check()`` and ``PyFrozenSet_Check()`` to the set API.
4669 - Backport of PyUnicode_FromString(), _FromStringAndSize(), _Format
4670 and _FormatV from Python 3.0. Made PyLong_AsSsize_t and
4671 PyLong_FromSsize_t public functions.
4673 - Patch #1720595: add T_BOOL to the range of structmember types.
4675 - Issue #1534: Added ``PyFloat_GetMax()``, ``PyFloat_GetMin()`` and
4676 ``PyFloat_GetInfo()`` to the float API.
4678 - Issue #1521: On 64bit platforms, using PyArgs_ParseTuple with the t#
4679 of w# format code incorrectly truncated the length to an int, even
4680 when PY_SSIZE_T_CLEAN is set. The str.decode method used to return
4681 incorrect results with huge strings.
4683 - Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
4684 Py_TYPE and Py_REFCNT.
4686 - PEP 3123: Provide forward compatibility with Python 3.0, while
4687 keeping backwards compatibility. Add Py_Refcnt, Py_Type, Py_Size,
4688 and PyVarObject_HEAD_INIT.
4690 - Py_ssize_t fields work in structmember when HAVE_LONG_LONG is not
4693 - Patch #1733960: Allow T_LONGLONG to accept ints.
4695 - T_PYSSIZET can now be used in PyMemberDef lists for Py_ssize_t members.
4697 - Added a new API function ``PyImport_ImportModuleNoBlock``.
4699 - Bug #1637022: Prefix AST symbols with _Py_.
4701 - Fix some leftovers from the conversion from int to Py_ssize_t
4702 (relevant to strings and sequences of more than 2**31 items).
4704 - Make _PyGILState_NoteThreadState() static, it was not used anywhere
4705 outside of pystate.c and should not be necessary.
4707 - ``PyImport_Import`` and ``PyImport_ImportModule`` now always do
4708 absolute imports. In earlier versions they might have used relative
4709 imports under some conditions.
4711 - Added case insensitive comparison methods ``PyOS_stricmp(char*,
4712 char*)`` and ``PyOS_strnicmp(char*, char*, Py_ssize_t)``.
4714 - Bug #1542693: remove semi-colon at end of PyImport_ImportModuleEx
4715 macro so it can be used as an expression.
4721 - Patch #1706: Drop support for Win9x, WinME and NT4. Python now
4722 requires Windows 2000 or greater. The _WINVER and NTDDI_VERSION
4723 macros are set to Win2k for x86/32bit builds and WinXP for AMD64
4726 - Conditionalize definition of _CRT_SECURE_NO_DEPRECATE and
4727 _CRT_NONSTDC_NO_DEPRECATE.
4729 - Bug #1216: Restore support for Visual Studio 2002.
4735 - cfmfile now raises a DeprecationWarning.
4737 - buildtools now raises a DeprecationWarning.
4739 - Removed the macfs module. It had been deprecated since Python 2.5.
4740 This lead to the deprecation of macostools.touched() as it relied
4741 solely on macfs and was a no-op under OS X.
4745 **(For information about older versions, consult the HISTORY file.)**