5 (editors: check NEWS.help for information about editing NEWS using ReST.)
7 What's New in Python 2.5.1c1?
8 =============================
10 *Release date: XX-XXX-XXXX*
15 - Bug #1456209: In some obscure cases it was possible for a class with a
16 custom ``__eq__()`` method to confuse set internals when class instances
17 were used as a set's elements and the ``__eq__()`` method mutated the set.
19 - Eliminated unnecessary repeated calls to hash() by set.intersection() and
20 set.symmetric_difference_update().
22 - Bug #1591996: Correctly forward exception in instance_contains().
24 - Bug #1588287: fix invalid assertion for `1,2` in debug builds.
26 - Bug #1576657: when setting a KeyError for a tuple key, make sure that
27 the tuple isn't used as the "exception arguments tuple". Applied to
28 both sets and dictionaries.
30 - Bug #1565514, SystemError not raised on too many nested blocks.
32 - Bug #1576174: WindowsError now displays the windows error code
33 again, no longer the posix error code.
35 - Patch #1549049: Support long values in structmember.
37 - Bug #1542016: make sys.callstats() match its docstring and return an
38 11-tuple (only relevant when Python is compiled with -DCALL_PROFILE).
40 - Bug #1545497: when given an explicit base, int() did ignore NULs
41 embedded in the string to convert.
43 - Bug #1569998: break inside a try statement (outside a loop) is now
44 recognized and rejected.
46 - Patch #1542451: disallow continue anywhere under a finally.
48 - list.pop(x) accepts any object x following the __index__ protocol.
50 - Fix some leftovers from the conversion from int to Py_ssize_t
51 (relevant to strings and sequences of more than 2**31 items).
53 - A number of places, including integer negation and absolute value,
54 were fixed to not rely on undefined behaviour of the C compiler
57 - Bug #1566800: make sure that EnvironmentError can be called with any
58 number of arguments, as was the case in Python 2.4.
60 - Patch #1567691: super() and new.instancemethod() now don't accept
61 keyword arguments any more (previously they accepted them, but didn't
64 - Fix a bug in the parser's future statement handling that led to "with"
65 not being recognized as a keyword after, e.g., this statement:
66 from __future__ import division, with_statement
68 - Bug #1557232: fix seg fault with def f((((x)))) and def f(((x),)).
70 - Fix %zd string formatting on Mac OS X so it prints negative numbers.
72 - Allow exception instances to be directly sliced again.
74 - fixed a bug with bsddb.DB.stat: the flags and txn keyword arguments
81 - Patch #1544279: Improve thread-safety of the socket module by moving
82 the sock_addr_t storage out of the socket object.
84 - Bug #1563807: _ctypes built on AIX fails with ld ffi error.
86 - Bug #1598620: A ctypes Structure cannot contain itself.
88 - Bug #1588217: don't parse "= " as a soft line break in binascii's
89 a2b_qp() function, instead leave it in the string as quopri.decode()
92 - Patch #838546: Make terminal become controlling in pty.fork()
94 - Patch #1560695: Add .note.GNU-stack to ctypes' sysv.S so that
95 ctypes isn't considered as requiring executable stacks.
97 - Bug #1567666: Emulate GetFileAttributesExA for Win95.
99 - Bug #1548891: The cStringIO.StringIO() constructor now encodes unicode
100 arguments with the system default encoding just like the write()
101 method does, instead of converting it to a raw buffer.
103 - Bug #1565150: Fix subsecond processing for os.utime on Windows.
105 - Patch #1572724: fix typo ('=' instead of '==') in _msi.c.
107 - Bug #1572832: fix a bug in ISO-2022 codecs which may cause segfault
108 when encoding non-BMP unicode characters.
110 - Bug #1556784: allow format strings longer than 127 characters in
111 datetime's strftime function.
113 - Fix itertools.count(n) to work with negative numbers again.
115 - Make regex engine raise MemoryError if allocating memory fails.
121 - Patch #1608267: fix a race condition in os.makedirs() is the directory
122 to be created is already there.
124 - Patch #1610437: fix a tarfile bug with long filename headers.
126 - Patch #1472877: Fix Tix subwidget name resolution.
128 - Patch #1594554: Always close a tkSimpleDialog on ok(), even
129 if an exception occurs.
131 - Patch #1538878: Don't make tkSimpleDialog dialogs transient if
132 the parent window is withdrawn.
134 - Patch #1360200: Use unmangled_version RPM spec field to deal with
137 - Patch #1359217: Process 2xx response in an ftplib transfer
138 that precedes an 1xx response.
140 - Patch #1060577: Extract list of RPM files from spec file in
143 - Bug #1586613: fix zlib and bz2 codecs' incremental en/decoders.
145 - Patch #1583880: fix tarfile's problems with long names and posix/
148 - Fix codecs.EncodedFile which did not use file_encoding in 2.5.0, and
149 fix all codecs file wrappers to work correctly with the "with"
150 statement (bug #1586513).
152 - ctypes callback functions only support 'fundamental' data types as
153 result type. Raise an error when something else is used. This is a
154 partial fix for Bug #1574584.
156 - Bug #813342: Start the IDLE subprocess with -Qnew if the parent
157 is started with that option.
159 - Bug #1446043: correctly raise a LookupError if an encoding name given
160 to encodings.search_function() contains a dot.
162 - Bug #1545341: The 'classifier' keyword argument to the Distutils setup()
163 function now accepts tuples as well as lists.
165 - Bug #1560617: in pyclbr, return full module name not only for classes,
166 but also for functions.
168 - Bug #1566602: correct failure of posixpath unittest when $HOME ends
171 - Bug #1565661: in webbrowser, split() the command for the default
172 GNOME browser in case it is a command with args.
174 - Bug #1569790: mailbox.py: Maildir.get_folder() and MH.get_folder()
175 weren't passing the message factory on to newly created Maildir/MH
178 - Bug #1575506: mailbox.py: Single-file mailboxes didn't re-lock
179 properly in their flush() method.
181 - Patch #1514543: mailbox.py: In the Maildir class, report errors if there's
182 a filename clash instead of possibly losing a message. (Patch by David
185 - Patch #1514544: mailbox.py: Try to ensure that messages/indexes have
186 been physically written to disk after calling .flush() or
187 .close(). (Patch by David Watson.)
189 - mailbox.py: Change MH.pack() to not lock individual message files; this
190 wasn't consistent with existing implementations of message packing, and
191 was buggy on some platforms.
193 - Bug #1576241: fix functools.wraps() to work on built-in functions.
195 - Patch #1574068: fix urllib/urllib2 to not insert line breaks when
196 HTTP authentication data was very long.
198 - Fix a bug in traceback.format_exception_only() that led to an error
199 being raised when print_exc() was called without an exception set.
200 In version 2.4, this printed "None", restored that behavior.
202 - Make webbrowser.BackgroundBrowser usable in Windows (it wasn't because
203 the close_fds arg to subprocess.Popen is not supported).
209 - Patch #1552024: add decorator support to unparse.py demo script.
215 - Remove passwd.adjunct.byname from list of maps
222 - Disable _XOPEN_SOURCE on NetBSD 1.x.
224 - Bug #1578513: Cross compilation was broken by a change to configure.
225 Repair so that it's back to how it was in 2.4.3.
227 - Patch #1576954: Update VC6 build directory; remove redundant
230 - Fix build failure on kfreebsd and on the hurd.
232 - Fix the build of the library reference in info format.
238 - Conditionalize definition of _CRT_SECURE_NO_DEPRECATE
239 and _CRT_NONSTDC_NO_DEPRECATE.
242 What's New in Python 2.5 (final)
243 ================================
245 *Release date: 19-SEP-2006*
247 No changes since release candidate 2.
250 What's New in Python 2.5 release candidate 2?
251 =============================================
253 *Release date: 12-SEP-2006*
258 - Make _PyGILState_NoteThreadState() static, it was not used anywhere
259 outside of pystate.c and should not be necessary.
261 - Bug #1551432: Exceptions do not define an explicit __unicode__ method. This
262 allows calling unicode() on exceptions classes directly to succeed.
264 - Bug #1542051: Exceptions now correctly call PyObject_GC_UnTrack.
265 Also make sure that every exception class has __module__ set to
268 - Bug #1550983: emit better error messages for erroneous relative
269 imports (if not in package and if beyond toplevel package).
271 - Overflow checking code in integer division ran afoul of new gcc
272 optimizations. Changed to be more standard-conforming.
274 - Patch #1541585: fix buffer overrun when performing repr() on
275 a unicode string in a build with wide unicode (UCS-4) support.
277 - Patch #1546288: fix seg fault in dict_equal due to ref counting bug.
279 - The return tuple from str.rpartition(sep) is (tail, sep, head) where
280 head is the original string if sep was not found.
282 - Bug #1520864: unpacking singleton tuples in list comprehensions and
283 generator expressions (x for x, in ... ) works again. Fixing this problem
284 required changing the .pyc magic number. This means that .pyc files
285 generated before 2.5c2 will be regenerated.
291 - Reverted patch #1504333 because it introduced an infinite loop.
293 - Patch #1553314: Fix the inspect.py slowdown that was hurting IPython & SAGE
294 by adding smarter caching in inspect.getmodule().
296 - Fix missing import of the types module in logging.config.
298 - Patch #1550886: Fix decimal module context management implementation
299 to match the localcontext() example from PEP 343.
301 - Bug #1541863: uuid.uuid1 failed to generate unique identifiers
302 on systems with low clock resolution.
304 - Bug #1543303, patch #1543897: remove NUL padding from tarfiles.
306 - Bug #1531862: Do not close standard file descriptors in subprocess.
312 - Bug #1599782: fix segfault on bsddb.db.DB().type().
314 - Fix bugs in ctypes:
315 - anonymous structure fields that have a bit-width specified did not work
316 - cast function did not accept c_char_p or c_wchar_p instances as first arg
318 - Bug #1551427: fix a wrong NULL pointer check in the win32 version
321 - Bug #1548092: fix curses.tparm seg fault on invalid input.
323 - Bug #1550714: fix SystemError from itertools.tee on negative value for n.
325 - Fixed a few bugs on cjkcodecs:
326 - gbk and gb18030 codec now handle U+30FB KATAKANA MIDDLE DOT correctly.
327 - iso2022_jp_2 codec now encodes into G0 for KS X 1001, GB2312
328 codepoints to conform the standard.
329 - iso2022_jp_3 and iso2022_jp_2004 codec can encode JIS X 0213:2
335 - Fix bsddb test_basics.test06_Transactions to check the version
342 - Bug #1565919: document set types in the Language Reference.
344 - Bug #1546052: clarify that PyString_FromString(AndSize) copies the
345 string pointed to by its parameter.
347 - Bug #1566663: remove obsolete example from datetime docs.
349 - Bug #1541682: Fix example in the "Refcount details" API docs.
350 Additionally, remove a faulty example showing PySequence_SetItem applied
351 to a newly created list object and add notes that this isn't a good idea.
357 - Bug #1546372: Fixed small bugglet in pybench that caused a missing
358 file not to get reported properly.
364 - Bug #1568842: Fix test for uintptr_t.
366 - Patch #1540470, for OpenBSD 4.0.
368 - Patch #1545507: Exclude ctypes package in Win64 MSI file.
370 - Fix OpenSSL debug build process.
376 - Bug #1542693: remove semi-colon at end of PyImport_ImportModuleEx macro
377 so it can be used as an expression.
380 What's New in Python 2.5 release candidate 1?
381 =============================================
383 *Release date: 17-AUG-2006*
388 - Fix infinite recursion when subclassing long and overriding __hash__.
390 - Fix concatenation (+=) of long strings.
392 - Unicode objects will no longer raise an exception when being
393 compared equal or unequal to a string and a UnicodeDecodeError
394 exception occurs, e.g. as result of a decoding failure.
396 Instead, the equal (==) and unequal (!=) comparison operators will
397 now issue a UnicodeWarning and interpret the two objects as
398 unequal. The UnicodeWarning can be filtered as desired using
399 the warning framework, e.g. silenced completely, turned into an
400 exception, logged, etc.
402 Note that compare operators other than equal and unequal will still
403 raise UnicodeDecodeError exceptions as they've always done.
405 - Fix segfault when doing string formatting on subclasses of long.
407 - Fix bug related to __len__ functions using values > 2**32 on 64-bit machines
408 with new-style classes.
410 - Fix bug related to __len__ functions returning negative values with
413 - Patch #1538606, Fix __index__() clipping. There were some problems
414 discovered with the API and how integers that didn't fit into Py_ssize_t
415 were handled. This patch attempts to provide enough alternatives
416 to effectively use __index__.
418 - Bug #1536021: __hash__ may now return long int; the final hash
419 value is obtained by invoking hash on the long int.
421 - Bug #1536786: buffer comparison could emit a RuntimeWarning.
423 - Bug #1535165: fixed a segfault in input() and raw_input() when
426 - On Windows, the PyErr_Warn function is now exported from
427 the Python dll again.
429 - Bug #1191458: tracing over for loops now produces a line event
430 on each iteration. Fixing this problem required changing the .pyc
431 magic number. This means that .pyc files generated before 2.5c1
434 - Bug #1333982: string/number constants were inappropriately stored
435 in the byte code and co_consts even if they were not used, ie
436 immediately popped off the stack.
438 - Fixed a reference-counting problem in property().
444 - Fix a bug in the ``compiler`` package that caused invalid code to be
445 generated for generator expressions.
447 - The distutils version has been changed to 2.5.0. The change to
448 keep it programmatically in sync with the Python version running
449 the code (introduced in 2.5b3) has been reverted. It will continue
450 to be maintained manually as static string literal.
452 - If the Python part of a ctypes callback function returns None,
453 and this cannot be converted to the required C type, an exception is
454 printed with PyErr_WriteUnraisable. Before this change, the C
455 callback returned arbitrary values to the calling code.
457 - The __repr__ method of a NULL ctypes.py_object() no longer raises
460 - uuid.UUID now has a bytes_le attribute. This returns the UUID in
461 little-endian byte order for Windows. In addition, uuid.py gained some
462 workarounds for clocks with low resolution, to stop the code yielding
465 - Patch #1540892: site.py Quitter() class attempts to close sys.stdin
466 before raising SystemExit, allowing IDLE to honor quit() and exit().
468 - Bug #1224621: make tabnanny recognize IndentationErrors raised by tokenize.
470 - Patch #1536071: trace.py should now find the full module name of a
471 file correctly even on Windows.
473 - logging's atexit hook now runs even if the rest of the module has
474 already been cleaned up.
476 - Bug #1112549, fix DoS attack on cgi.FieldStorage.
478 - Bug #1531405, format_exception no longer raises an exception if
479 str(exception) raised an exception.
481 - Fix a bug in the ``compiler`` package that caused invalid code to be
482 generated for nested functions.
488 - Ignore data that arrives before the opening start tag in C etree.
490 - Patch #1511317: don't crash on invalid hostname (alias) info.
492 - Patch #1535500: fix segfault in BZ2File.writelines and make sure it
493 raises the correct exceptions.
495 - Patch # 1536908: enable building ctypes on OpenBSD/AMD64. The
496 '-no-stack-protector' compiler flag for OpenBSD has been removed.
498 - Patch #1532975 was applied, which fixes Bug #1533481: ctypes now
499 uses the _as_parameter_ attribute when objects are passed to foreign
500 function calls. The ctypes version number was changed to 1.0.1.
502 - Bug #1530559, struct.pack raises TypeError where it used to convert.
503 Passing float arguments to struct.pack when integers are expected
504 now triggers a DeprecationWarning.
510 - test_socketserver should now work on cygwin and not fail sporadically
513 - test_mailbox should now work on cygwin versions 2006-08-10 and later.
515 - Bug #1535182: really test the xreadlines() method of bz2 objects.
517 - test_threading now skips testing alternate thread stack sizes on
518 platforms that don't support changing thread stack size.
524 - Patch #1534922: unittest docs were corrected and enhanced.
530 - Bug #1535502, build _hashlib on Windows, and use masm assembler
533 - Bug #1534738, win32 debug version of _msi should be _msi_d.pyd.
535 - Bug #1530448, ctypes build failure on Solaris 10 was fixed.
541 - New API for Unicode rich comparisons: PyUnicode_RichCompare()
543 - Bug #1069160. Internal correctness changes were made to
544 ``PyThreadState_SetAsyncExc()``. A test case was added, and
545 the documentation was changed to state that the return value
546 is always 1 (normal) or 0 (if the specified thread wasn't found).
549 What's New in Python 2.5 beta 3?
550 ================================
552 *Release date: 03-AUG-2006*
557 - _PyWeakref_GetWeakrefCount() now returns a Py_ssize_t; it previously
558 returned a long (see PEP 353).
560 - Bug #1515471: string.replace() accepts character buffers again.
562 - Add PyErr_WarnEx() so C code can pass the stacklevel to warnings.warn().
563 This provides the proper warning for struct.pack().
564 PyErr_Warn() is now deprecated in favor of PyErr_WarnEx().
566 - Patch #1531113: Fix augmented assignment with yield expressions.
567 Also fix a SystemError when trying to assign to yield expressions.
569 - Bug #1529871: The speed enhancement patch #921466 broke Python's compliance
570 with PEP 302. This was fixed by adding an ``imp.NullImporter`` type that is
571 used in ``sys.path_importer_cache`` to cache non-directory paths and avoid
572 excessive filesystem operations during imports.
574 - Bug #1521947: When checking for overflow, ``PyOS_strtol()`` used some
575 operations on signed longs that are formally undefined by C.
576 Unfortunately, at least one compiler now cares about that, so complicated
577 the code to make that compiler happy again.
579 - Bug #1524310: Properly report errors from FindNextFile in os.listdir.
581 - Patch #1232023: Stop including current directory in search
584 - Fix some potential crashes found with failmalloc.
586 - Fix warnings reported by Klocwork's static analysis tool.
588 - Bug #1512814, Fix incorrect lineno's when code within a function
589 had more than 255 blank lines.
591 - Patch #1521179: Python now accepts the standard options ``--help`` and
592 ``--version`` as well as ``/?`` on Windows.
594 - Bug #1520864: unpacking singleton tuples in a 'for' loop (for x, in) works
595 again. Fixing this problem required changing the .pyc magic number.
596 This means that .pyc files generated before 2.5b3 will be regenerated.
598 - Bug #1524317: Compiling Python ``--without-threads`` failed.
599 The Python core compiles again, and, in a build without threads, the
600 new ``sys._current_frames()`` returns a dictionary with one entry,
601 mapping the faux "thread id" 0 to the current frame.
603 - Bug #1525447: build on MacOS X on a case-sensitive filesystem.
609 - Correction of patch #1455898: In the mbcs decoder, set final=False
610 for stream decoder, but final=True for the decode function.
612 - os.urandom no longer masks unrelated exceptions like SystemExit or
615 - Bug #1525866: Don't copy directory stat times in
616 shutil.copytree on Windows
618 - Bug #1002398: The documentation for os.path.sameopenfile now correctly
619 refers to file descriptors, not file objects.
621 - The renaming of the xml package to xmlcore, and the import hackery done
622 to make it appear at both names, has been removed. Bug #1511497,
623 #1513611, and probably others.
625 - Bug #1441397: The compiler module now recognizes module and function
626 docstrings correctly as it did in Python 2.4.
628 - Bug #1529297: The rewrite of doctest for Python 2.4 unintentionally
629 lost that tests are sorted by name before being run. This rarely
630 matters for well-written tests, but can create baffling symptoms if
631 side effects from one test to the next affect outcomes. ``DocTestFinder``
632 has been changed to sort the list of tests it returns.
634 - The distutils version has been changed to 2.5.0, and is now kept
635 in sync with sys.version_info[:3].
637 - Bug #978833: Really close underlying socket in _socketobject.close.
639 - Bug #1459963: urllib and urllib2 now normalize HTTP header names with
642 - Patch #1525766: In pkgutil.walk_packages, correctly pass the onerror callback
643 to recursive calls and call it with the failing package name.
645 - Bug #1525817: Don't truncate short lines in IDLE's tool tips.
647 - Patch #1515343: Fix printing of deprecated string exceptions with a
648 value in the traceback module.
650 - Resync optparse with Optik 1.5.3: minor tweaks for/to tests.
652 - Patch #1524429: Use repr() instead of backticks in Tkinter again.
654 - Bug #1520914: Change time.strftime() to accept a zero for any position in its
655 argument tuple. For arguments where zero is illegal, the value is forced to
656 the minimum value that is correct. This is to support an undocumented but
657 common way people used to fill in inconsequential information in the time
660 - Patch #1220874: Update the binhex module for Mach-O.
662 - The email package has improved RFC 2231 support, specifically for
663 recognizing the difference between encoded (name*0*=<blah>) and non-encoded
664 (name*0=<blah>) parameter continuations. This may change the types of
665 values returned from email.message.Message.get_param() and friends.
666 Specifically in some cases where non-encoded continuations were used,
667 get_param() used to return a 3-tuple of (None, None, string) whereas now it
668 will just return the string (since non-encoded continuations don't have
669 charset and language parts).
671 Also, whereas % values were decoded in all parameter continuations, they are
672 now only decoded in encoded parameter parts.
674 - Bug #1517990: IDLE keybindings on MacOS X now work correctly
676 - Bug #1517996: IDLE now longer shows the default Tk menu when a
677 path browser, class browser or debugger is the frontmost window on MacOS X
679 - Patch #1520294: Support for getset and member descriptors in types.py,
680 inspect.py, and pydoc.py. Specifically, this allows for querying the type
681 of an object against these built-in types and more importantly, for getting
682 their docstrings printed in the interactive interpreter's help() function.
688 - Patch #1519025 and bug #926423: If a KeyboardInterrupt occurs during
689 a socket operation on a socket with a timeout, the exception will be
690 caught correctly. Previously, the exception was not caught.
692 - Patch #1529514: The _ctypes extension is now compiled on more
693 openbsd target platforms.
695 - The ``__reduce__()`` method of the new ``collections.defaultdict`` had
696 a memory leak, affecting pickles and deep copies.
698 - Bug #1471938: Fix curses module build problem on Solaris 8; patch by
701 - Patch #1448199: Release interpreter lock in _winreg.ConnectRegistry.
703 - Patch #1521817: Index range checking on ctypes arrays containing
704 exactly one element enabled again. This allows iterating over these
705 arrays, without the need to check the array size before.
707 - Bug #1521375: When the code in ctypes.util.find_library was
708 run with root privileges, it could overwrite or delete
709 /dev/null in certain cases; this is now fixed.
711 - Bug #1467450: On Mac OS X 10.3, RTLD_GLOBAL is now used as the
712 default mode for loading shared libraries in ctypes.
714 - Because of a misspelled preprocessor symbol, ctypes was always
715 compiled without thread support; this is now fixed.
717 - pybsddb Bug #1527939: bsddb module DBEnv dbremove and dbrename
718 methods now allow their database parameter to be None as the
719 sleepycat API allows.
721 - Bug #1526460: Fix socketmodule compile on NetBSD as it has a different
722 bluetooth API compared with Linux and FreeBSD.
727 - Bug #1501330: Change test_ossaudiodev to be much more tolerant in terms of
728 how long the test file should take to play. Now accepts taking 2.93 secs
729 (exact time) +/- 10% instead of the hard-coded 3.1 sec.
731 - Patch #1529686: The standard tests ``test_defaultdict``, ``test_iterlen``,
732 ``test_uuid`` and ``test_email_codecs`` didn't actually run any tests when
733 run via ``regrtest.py``. Now they do.
738 - Bug #1439538: Drop usage of test -e in configure as it is not portable.
743 - PythonLauncher now works correctly when the path to the script contains
744 characters that are treated specially by the shell (such as quotes).
746 - Bug #1527397: PythonLauncher now launches scripts with the working directory
747 set to the directory that contains the script instead of the user home
748 directory. That latter was an implementation accident and not what users
752 What's New in Python 2.5 beta 2?
753 ================================
755 *Release date: 11-JUL-2006*
760 - Bug #1441486: The literal representation of -(sys.maxint - 1)
761 again evaluates to a int object, not a long.
763 - Bug #1501934: The scope of global variables that are locally assigned
764 using augmented assignment is now correctly determined.
766 - Bug #927248: Recursive method-wrapper objects can now safely
769 - Bug #1417699: Reject locale-specific decimal point in float()
772 - Bug #1511381: codec_getstreamcodec() in codec.c is corrected to
773 omit a default "error" argument for NULL pointer. This allows
774 the parser to take a codec from cjkcodecs again.
776 - Bug #1519018: 'as' is now validated properly in import statements.
778 - On 64 bit systems, int literals that use less than 64 bits are
779 now ints rather than longs.
781 - Bug #1512814, Fix incorrect lineno's when code at module scope
782 started after line 256.
784 - New function ``sys._current_frames()`` returns a dict mapping thread
785 id to topmost thread stack frame. This is for expert use, and is
786 especially useful for debugging application deadlocks. The functionality
787 was previously available in Fazal Majid's ``threadframe`` extension
788 module, but it wasn't possible to do this in a wholly threadsafe way from
794 - Bug #1257728: Mention Cygwin in distutils error message about a missing
797 - Patch #1519566: Update turtle demo, make begin_fill idempotent.
799 - Bug #1508010: msvccompiler now requires the DISTUTILS_USE_SDK
800 environment variable to be set in order to the SDK environment
801 for finding the compiler, include files, etc.
803 - Bug #1515998: Properly generate logical ids for files in bdist_msi.
805 - warnings.py now ignores ImportWarning by default
807 - string.Template() now correctly handles tuple-values. Previously,
808 multi-value tuples would raise an exception and single-value tuples would
809 be treated as the value they contain, instead.
811 - Bug #822974: Honor timeout in telnetlib.{expect,read_until}
812 even if some data are received.
814 - Bug #1267547: Put proper recursive setup.py call into the
815 spec file generated by bdist_rpm.
817 - Bug #1514693: Update turtle's heading when switching between
820 - Reimplement turtle.circle using a polyline, to allow correct
823 - Bug #1514703: Only setup canvas window in turtle when the canvas
826 - Bug #1513223: .close() of a _socketobj now releases the underlying
827 socket again, which then gets closed as it becomes unreferenced.
829 - Bug #1504333: Make sgmllib support angle brackets in quoted
832 - Bug #853506: Fix IPv6 address parsing in unquoted attributes in
833 sgmllib ('[' and ']' were not accepted).
835 - Fix a bug in the turtle module's end_fill function.
837 - Bug #1510580: The 'warnings' module improperly required that a Warning
838 category be either a types.ClassType and a subclass of Warning. The proper
839 check is just that it is a subclass with Warning as the documentation states.
841 - The compiler module now correctly compiles the new try-except-finally
842 statement (bug #1509132).
844 - The wsgiref package is now installed properly on Unix.
846 - A bug was fixed in logging.config.fileConfig() which caused a crash on
847 shutdown when fileConfig() was called multiple times.
849 - The sqlite3 module did cut off data from the SQLite database at the first
850 null character before sending it to a custom converter. This has been fixed
856 - #1494314: Fix a regression with high-numbered sockets in 2.4.3. This
857 means that select() on sockets > FD_SETSIZE (typically 1024) work again.
858 The patch makes sockets use poll() internally where available.
860 - Assigning None to pointer type fields in ctypes structures possible
861 overwrote the wrong fields, this is fixed now.
863 - Fixed a segfault in _ctypes when ctypes.wintypes were imported
864 on non-Windows platforms.
866 - Bug #1518190: The ctypes.c_void_p constructor now accepts any
867 integer or long, without range checking.
869 - Patch #1517790: It is now possible to use custom objects in the ctypes
870 foreign function argtypes sequence as long as they provide a from_param
871 method, no longer is it required that the object is a ctypes type.
873 - The '_ctypes' extension module now works when Python is configured
874 with the --without-threads option.
876 - Bug #1513646: os.access on Windows now correctly determines write
879 - Bug #1512695: cPickle.loads could crash if it was interrupted with
882 - Bug #1296433: parsing XML with a non-default encoding and
883 a CharacterDataHandler could crash the interpreter in pyexpat.
885 - Patch #1516912: improve Modules support for OpenVMS.
890 - Automate Windows build process for the Win64 SSL module.
892 - 'configure' now detects the zlib library the same way as distutils.
893 Previously, the slight difference could cause compilation errors of the
894 'zlib' module on systems with more than one version of zlib.
896 - The MSI compileall step was fixed to also support a TARGETDIR
899 - Bug #1517388: sqlite3.dll is now installed on Windows independent
902 - Bug #1513032: 'make install' failed on FreeBSD 5.3 due to lib-old
903 trying to be installed even though it's empty.
908 - Call os.waitpid() at the end of tests that spawn child processes in order
909 to minimize resources (zombies).
914 - Cover ImportWarning, PendingDeprecationWarning and simplefilter() in the
915 documentation for the warnings module.
917 - Patch #1509163: MS Toolkit Compiler no longer available.
919 - Patch #1504046: Add documentation for xml.etree.
922 What's New in Python 2.5 beta 1?
923 ================================
925 *Release date: 20-JUN-2006*
930 - Patch #1507676: Error messages returned by invalid abstract object operations
931 (such as iterating over an integer) have been improved and now include the
932 type of the offending object to help with debugging.
934 - Bug #992017: A classic class that defined a __coerce__() method that returned
935 its arguments swapped would infinitely recurse and segfault the interpreter.
937 - Fix the socket tests so they can be run concurrently.
939 - Removed 5 integers from C frame objects (PyFrameObject).
940 f_nlocals, f_ncells, f_nfreevars, f_stack_size, f_restricted.
942 - Bug #532646: object.__call__() will continue looking for the __call__
943 attribute on objects until one without one is found. This leads to recursion
944 when you take a class and set its __call__ attribute to an instance of the
945 class. Originally fixed for classic classes, but this fix is for new-style.
946 Removes the infinite_rec_3 crasher.
948 - The string and unicode methods startswith() and endswith() now accept
949 a tuple of prefixes/suffixes to look for. Implements RFE #1491485.
951 - Buffer objects, at the C level, never used the char buffer
952 implementation even when the char buffer for the wrapped object was
953 explicitly requested (originally returned the read or write buffer).
954 Now a TypeError is raised if the char buffer is not present but is
957 - Patch #1346214: Statements like "if 0: suite" are now again optimized
958 away like they were in Python 2.4.
960 - Builtin exceptions are now full-blown new-style classes instead of
961 instances pretending to be classes, which speeds up exception handling
962 by about 80% in comparison to 2.5a2.
964 - Patch #1494554: Update unicodedata.numeric and unicode.isnumeric to
967 - Patch #921466: sys.path_importer_cache is now used to cache valid and
968 invalid file paths for the built-in import machinery which leads to
969 fewer open calls on startup.
971 - Patch #1442927: ``long(str, base)`` is now up to 6x faster for non-power-
972 of-2 bases. The largest speedup is for inputs with about 1000 decimal
973 digits. Conversion from non-power-of-2 bases remains quadratic-time in
974 the number of input digits (it was and remains linear-time for bases
977 - Bug #1334662: ``int(string, base)`` could deliver a wrong answer
978 when ``base`` was not 2, 4, 8, 10, 16 or 32, and ``string`` represented
979 an integer close to ``sys.maxint``. This was repaired by patch
980 #1335972, which also gives a nice speedup.
982 - Patch #1337051: reduced size of frame objects.
984 - PyErr_NewException now accepts a tuple of base classes as its
987 - Patch #876206: function call speedup by retaining allocated frame
990 - Bug #1462152: file() now checks more thoroughly for invalid mode
991 strings and removes a possible "U" before passing the mode to the
994 - Patch #1488312, Fix memory alignment problem on SPARC in unicode
996 - Bug #1487966: Fix SystemError with conditional expression in assignment
998 - WindowsError now has two error code attributes: errno, which carries
999 the error values from errno.h, and winerror, which carries the error
1000 values from winerror.h. Previous versions put the winerror.h values
1001 (from GetLastError()) into the errno attribute.
1003 - Patch #1475845: Raise IndentationError for unexpected indent.
1005 - Patch #1479181: split open() and file() from being aliases for each other.
1007 - Patch #1497053 & bug #1275608: Exceptions occurring in ``__eq__()``
1008 methods were always silently ignored by dictionaries when comparing keys.
1009 They are now passed through (except when using the C API function
1010 ``PyDict_GetItem()``, whose semantics did not change).
1012 - Bug #1456209: In some obscure cases it was possible for a class with a
1013 custom ``__eq__()`` method to confuse dict internals when class instances
1014 were used as a dict's keys and the ``__eq__()`` method mutated the dict.
1015 No, you don't have any code that did this ;-)
1020 - Bug #1295808: expat symbols should be namespaced in pyexpat
1022 - Patch #1462338: Upgrade pyexpat to expat 2.0.0
1024 - Change binascii.hexlify to accept a read-only buffer instead of only a char
1025 buffer and actually follow its documentation.
1027 - Fixed a potentially invalid memory access of CJKCodecs' shift-jis decoder.
1029 - Patch #1478788 (modified version): The functional extension module has
1030 been renamed to _functools and a functools Python wrapper module added.
1031 This provides a home for additional function related utilities that are
1032 not specifically about functional programming. See PEP 309.
1034 - Patch #1493701: performance enhancements for struct module.
1036 - Patch #1490224: time.altzone is now set correctly on Cygwin.
1038 - Patch #1435422: zlib's compress and decompress objects now have a
1041 - Patch #1454481: thread stack size is now tunable at runtime for thread
1042 enabled builds on Windows and systems with Posix threads support.
1044 - On Win32, os.listdir now supports arbitrarily-long Unicode path names
1045 (up to the system limit of 32K characters).
1047 - Use Win32 API to implement os.{access,chdir,chmod,mkdir,remove,rename,rmdir,utime}.
1048 As a result, these functions now raise WindowsError instead of OSError.
1050 - ``time.clock()`` on Win64 should use the high-performance Windows
1051 ``QueryPerformanceCounter()`` now (as was already the case on 32-bit
1054 - Calling Tk_Init twice is refused if the first call failed as that
1057 - bsddb: added the DB_ARCH_REMOVE flag and fixed db.DBEnv.log_archive() to
1058 accept it without potentially using an uninitialized pointer.
1060 - bsddb: added support for the DBEnv.log_stat() and DBEnv.lsn_reset() methods
1061 assuming BerkeleyDB >= 4.0 and 4.4 respectively. [pybsddb project SF
1062 patch numbers 1494885 and 1494902]
1064 - bsddb: added an interface for the BerkeleyDB >= 4.3 DBSequence class.
1065 [pybsddb project SF patch number 1466734]
1067 - bsddb: fix DBCursor.pget() bug with keyword argument names when no data
1068 parameter is supplied. [SF pybsddb bug #1477863]
1070 - bsddb: the __len__ method of a DB object has been fixed to return correct
1071 results. It could previously incorrectly return 0 in some cases.
1072 Fixes SF bug 1493322 (pybsddb bug 1184012).
1074 - bsddb: the bsddb.dbtables Modify method now raises the proper error and
1075 aborts the db transaction safely when a modifier callback fails.
1076 Fixes SF python patch/bug #1408584.
1078 - bsddb: multithreaded DB access using the simple bsddb module interface
1079 now works reliably. It has been updated to use automatic BerkeleyDB
1080 deadlock detection and the bsddb.dbutils.DeadlockWrap wrapper to retry
1081 database calls that would previously deadlock. [SF python bug #775414]
1083 - Patch #1446489: add support for the ZIP64 extensions to zipfile.
1085 - Patch #1506645: add Python wrappers for the curses functions
1086 is_term_resized, resize_term and resizeterm.
1091 - Patch #815924: Restore ability to pass type= and icon= in tkMessageBox
1094 - Patch #812986: Update turtle output even if not tracing.
1096 - Patch #1494750: Destroy master after deleting children in
1099 - Patch #1096231: Add ``default`` argument to Tkinter.Wm.wm_iconbitmap.
1101 - Patch #763580: Add name and value arguments to Tkinter variable
1104 - Bug #1117556: SimpleHTTPServer now tries to find and use the system's
1105 mime.types file for determining MIME types.
1107 - Bug #1339007: Shelf objects now don't raise an exception in their
1108 __del__ method when initialization failed.
1110 - Patch #1455898: The MBCS codec now supports the incremental mode for
1111 double-byte encodings.
1113 - ``difflib``'s ``SequenceMatcher.get_matching_blocks()`` was changed to
1114 guarantee that adjacent triples in the return list always describe
1115 non-adjacent blocks. Previously, a pair of matching blocks could end
1116 up being described by multiple adjacent triples that formed a partition
1117 of the matching pair.
1119 - Bug #1498146: fix optparse to handle Unicode strings in option help,
1120 description, and epilog.
1122 - Bug #1366250: minor optparse documentation error.
1124 - Bug #1361643: fix textwrap.dedent() so it handles tabs appropriately;
1127 - The wsgiref package has been added to the standard library.
1129 - The functions update_wrapper() and wraps() have been added to the functools
1130 module. These make it easier to copy relevant metadata from the original
1131 function when writing wrapper functions.
1133 - The optional ``isprivate`` argument to ``doctest.testmod()``, and the
1134 ``doctest.is_private()`` function, both deprecated in 2.4, were removed.
1136 - Patch #1359618: Speed up charmap encoder by using a trie structure
1139 - The functions in the ``pprint`` module now sort dictionaries by key
1140 before computing the display. Before 2.5, ``pprint`` sorted a dictionary
1141 if and only if its display required more than one line, although that
1142 wasn't documented. The new behavior increases predictability; e.g.,
1143 using ``pprint.pprint(a_dict)`` in a doctest is now reliable.
1145 - Patch #1497027: try HTTP digest auth before basic auth in urllib2
1146 (thanks for J. J. Lee).
1148 - Patch #1496206: improve urllib2 handling of passwords with respect to
1149 default HTTP and HTTPS ports.
1151 - Patch #1080727: add "encoding" parameter to doctest.DocFileSuite.
1153 - Patch #1281707: speed up gzip.readline.
1155 - Patch #1180296: Two new functions were added to the locale module:
1156 format_string() to get the effect of "format % items" but locale-aware,
1157 and currency() to format a monetary number with currency sign.
1159 - Patch #1486962: Several bugs in the turtle Tk demo module were fixed
1160 and several features added, such as speed and geometry control.
1162 - Patch #1488881: add support for external file objects in bz2 compressed
1165 - Patch #721464: pdb.Pdb instances can now be given explicit stdin and
1166 stdout arguments, making it possible to redirect input and output
1167 for remote debugging.
1169 - Patch #1484695: Update the tarfile module to version 0.8. This fixes
1170 a couple of issues, notably handling of long file names using the
1171 GNU LONGNAME extension.
1173 - Patch #1478292. ``doctest.register_optionflag(name)`` shouldn't create a
1174 new flag when ``name`` is already the name of an option flag.
1176 - Bug #1385040: don't allow "def foo(a=1, b): pass" in the compiler
1179 - Patch #1472854: make the rlcompleter.Completer class usable on non-
1182 - Patch #1470846: fix urllib2 ProxyBasicAuthHandler.
1184 - Bug #1472827: correctly escape newlines and tabs in attribute values in
1185 the saxutils.XMLGenerator class.
1191 - Bug #1502728: Correctly link against librt library on HP-UX.
1193 - OpenBSD 3.9 is supported now.
1195 - Patch #1492356: Port to Windows CE.
1197 - Bug/Patch #1481770: Use .so extension for shared libraries on HP-UX for ia64.
1199 - Patch #1471883: Add --enable-universalsdk.
1215 What's New in Python 2.5 alpha 2?
1216 =================================
1218 *Release date: 27-APR-2006*
1223 - Bug #1465834: 'bdist_wininst preinstall script support' was fixed
1224 by converting these apis from macros into exported functions again:
1226 PyParser_SimpleParseFile PyParser_SimpleParseString PyRun_AnyFile
1227 PyRun_AnyFileEx PyRun_AnyFileFlags PyRun_File PyRun_FileEx
1228 PyRun_FileFlags PyRun_InteractiveLoop PyRun_InteractiveOne
1229 PyRun_SimpleFile PyRun_SimpleFileEx PyRun_SimpleString
1230 PyRun_String Py_CompileString
1232 - Under COUNT_ALLOCS, types are not necessarily immortal anymore.
1234 - All uses of PyStructSequence_InitType have been changed to initialize
1235 the type objects only once, even if the interpreter is initialized
1238 - Bug #1454485, array.array('u') could crash the interpreter. This was
1239 due to PyArgs_ParseTuple(args, 'u#', ...) trying to convert buffers (strings)
1240 to unicode when it didn't make sense. 'u#' now requires a unicode string.
1242 - Py_UNICODE is unsigned. It was always documented as unsigned, but
1243 due to a bug had a signed value in previous versions.
1245 - Patch #837242: ``id()`` of any Python object always gives a positive
1246 number now, which might be a long integer. ``PyLong_FromVoidPtr`` and
1247 ``PyLong_AsVoidPtr`` have been changed accordingly. Note that it has
1248 never been correct to implement a ``__hash()__`` method that returns the
1249 ``id()`` of an object:
1252 return id(self) # WRONG
1254 because a hash result must be a (short) Python int but it was always
1255 possible for ``id()`` to return a Python long. However, because ``id()``
1256 could return negative values before, on a 32-bit box an ``id()`` result
1257 was always usable as a hash value before this patch. That's no longer
1260 - Python on OS X 10.3 and above now uses dlopen() (via dynload_shlib.c)
1261 to load extension modules and now provides the dl module. As a result,
1262 sys.setdlopenflags() now works correctly on these systems. (SF patch
1265 - Patch #1463867: enhanced garbage collection to allow cleanup of cycles
1266 involving generators that have paused outside of any ``try`` or ``with``
1267 blocks. (In 2.5a1, a paused generator that was part of a reference
1268 cycle could not be garbage collected, regardless of whether it was
1269 paused in a ``try`` or ``with`` block.)
1274 - Patch #1191065: Fix preprocessor problems on systems where recvfrom
1277 - Bug #1467952: os.listdir() now correctly raises an error if readdir()
1278 fails with an error condition.
1280 - Fixed bsddb.db.DBError derived exceptions so they can be unpickled.
1282 - Bug #1117761: bsddb.*open() no longer raises an exception when using
1283 the cachesize parameter.
1285 - Bug #1149413: bsddb.*open() no longer raises an exception when using
1286 a temporary db (file=None) with the 'n' flag to truncate on open.
1288 - Bug #1332852: bsddb module minimum BerkeleyDB version raised to 3.3
1289 as older versions cause excessive test failures.
1291 - Patch #1062014: AF_UNIX sockets under Linux have a special
1292 abstract namespace that is now fully supported.
1297 - Bug #1223937: subprocess.CalledProcessError reports the exit status
1298 of the process using the returncode attribute, instead of
1301 - Patch #1475231: ``doctest`` has a new ``SKIP`` option, which causes
1302 a doctest to be skipped (the code is not run, and the expected output
1303 or exception is ignored).
1305 - Fixed contextlib.nested to cope with exceptions being raised and
1306 caught inside exit handlers.
1308 - Updated optparse module to Optik 1.5.1 (allow numeric constants in
1309 hex, octal, or binary; add ``append_const`` action; keep going if
1310 gettext cannot be imported; added ``OptionParser.destroy()`` method;
1311 added ``epilog`` for better help generation).
1313 - Bug #1473760: ``tempfile.TemporaryFile()`` could hang on Windows, when
1314 called from a thread spawned as a side effect of importing a module.
1316 - The pydoc module now supports documenting packages contained in
1319 - The pkgutil module now has several new utility functions, such
1320 as ``walk_packages()`` to support working with packages that are either
1321 in the filesystem or zip files.
1323 - The mailbox module can now modify and delete messages from
1324 mailboxes, in addition to simply reading them. Thanks to Gregory
1325 K. Johnson for writing the code, and to the 2005 Google Summer of
1326 Code for funding his work.
1328 - The ``__del__`` method of class ``local`` in module ``_threading_local``
1329 returned before accomplishing any of its intended cleanup.
1331 - Patch #790710: Add breakpoint command lists in pdb.
1333 - Patch #1063914: Add Tkinter.Misc.clipboard_get().
1335 - Patch #1191700: Adjust column alignment in bdb breakpoint lists.
1337 - SimpleXMLRPCServer relied on the fcntl module, which is unavailable on
1338 Windows. Bug #1469163.
1340 - The warnings, linecache, inspect, traceback, site, and doctest modules
1341 were updated to work correctly with modules imported from zipfiles or
1342 via other PEP 302 __loader__ objects.
1344 - Patch #1467770: Reduce usage of subprocess._active to processes which
1345 the application hasn't waited on.
1347 - Patch #1462222: Fix Tix.Grid.
1349 - Fix exception when doing glob.glob('anything*/')
1351 - The pstats.Stats class accepts an optional stream keyword argument to
1352 direct output to an alternate file-like object.
1357 - The Makefile now has a reindent target, which runs reindent.py on
1360 - Patch #1470875: Building Python with MS Free Compiler
1362 - Patch #1161914: Add a python-config script.
1364 - Patch #1324762:Remove ccpython.cc; replace --with-cxx with
1365 --with-cxx-main. Link with C++ compiler only if --with-cxx-main was
1366 specified. (Can be overridden by explicitly setting LINKCC.) Decouple
1367 CXX from --with-cxx-main, see description in README.
1369 - Patch #1429775: Link extension modules with the shared libpython.
1371 - Fixed a libffi build problem on MIPS systems.
1373 - ``PyString_FromFormat``, ``PyErr_Format``, and ``PyString_FromFormatV``
1374 now accept formats "%u" for unsigned ints, "%lu" for unsigned longs,
1375 and "%zu" for unsigned integers of type ``size_t``.
1380 - test_contextlib now checks contextlib.nested can cope with exceptions
1381 being raised and caught inside exit handlers.
1383 - test_cmd_line now checks operation of the -m and -c command switches
1385 - The test_contextlib test in 2.5a1 wasn't actually run unless you ran
1386 it separately and by hand. It also wasn't cleaning up its changes to
1387 the current Decimal context.
1389 - regrtest.py now has a -M option to run tests that test the new limits of
1390 containers, on 64-bit architectures. Running these tests is only sensible
1391 on 64-bit machines with more than two gigabytes of memory. The argument
1392 passed is the maximum amount of memory for the tests to use.
1397 - Added the Python benchmark suite pybench to the Tools/ directory;
1398 contributed by Marc-Andre Lemburg.
1403 - Patch #1473132: Improve docs for ``tp_clear`` and ``tp_traverse``.
1405 - PEP 343: Added Context Types section to the library reference
1406 and attempted to bring other PEP 343 related documentation into
1407 line with the implementation and/or python-dev discussions.
1409 - Bug #1337990: clarified that ``doctest`` does not support examples
1410 requiring both expected output and an exception.
1413 What's New in Python 2.5 alpha 1?
1414 =================================
1416 *Release date: 05-APR-2006*
1421 - PEP 338: -m command line switch now delegates to runpy.run_module
1422 allowing it to support modules in packages and zipfiles
1424 - On Windows, .DLL is not an accepted file name extension for
1425 extension modules anymore; extensions are only found if they
1428 - Bug #1421664: sys.stderr.encoding is now set to the same value as
1429 sys.stdout.encoding.
1431 - __import__ accepts keyword arguments.
1433 - Patch #1460496: round() now accepts keyword arguments.
1435 - Fixed bug #1459029 - unicode reprs were double-escaped.
1437 - Patch #1396919: The system scope threads are reenabled on FreeBSD
1438 5.4 and later versions.
1440 - Bug #1115379: Compiling a Unicode string with an encoding declaration
1441 now gives a SyntaxError.
1443 - Previously, Python code had no easy way to access the contents of a
1444 cell object. Now, a ``cell_contents`` attribute has been added
1445 (closes patch #1170323).
1447 - Patch #1123430: Python's small-object allocator now returns an arena to
1448 the system ``free()`` when all memory within an arena becomes unused
1449 again. Prior to Python 2.5, arenas (256KB chunks of memory) were never
1450 freed. Some applications will see a drop in virtual memory size now,
1451 especially long-running applications that, from time to time, temporarily
1452 use a large number of small objects. Note that when Python returns an
1453 arena to the platform C's ``free()``, there's no guarantee that the
1454 platform C library will in turn return that memory to the operating system.
1455 The effect of the patch is to stop making that impossible, and in tests it
1456 appears to be effective at least on Microsoft C and gcc-based systems.
1457 Thanks to Evan Jones for hard work and patience.
1459 - Patch #1434038: property() now uses the getter's docstring if there is
1460 no "doc" argument given. This makes it possible to legitimately use
1461 property() as a decorator to produce a read-only property.
1463 - PEP 357, patch 1436368: add an __index__ method to int/long and a matching
1464 nb_index slot to the PyNumberMethods struct. The slot is consulted instead
1465 of requiring an int or long in slicing and a few other contexts, enabling
1466 other objects (e.g. Numeric Python's integers) to be used as slice indices.
1468 - Fixed various bugs reported by Coverity's Prevent tool.
1470 - PEP 352, patch #1104669: Make exceptions new-style objects. Introduced the
1471 new exception base class, BaseException, which has a new message attribute.
1472 KeyboardInterrupt and SystemExit to directly inherit from BaseException now.
1473 Raising a string exception now raises a DeprecationWarning.
1475 - Patch #1438387, PEP 328: relative and absolute imports. Imports can now be
1476 explicitly relative, using 'from .module import name' to mean 'from the same
1477 package as this module is in. Imports without dots still default to the
1478 old relative-then-absolute, unless 'from __future__ import
1479 absolute_import' is used.
1481 - Properly check if 'warnings' raises an exception (usually when a filter set
1482 to "error" is triggered) when raising a warning for raising string
1485 - CO_GENERATOR_ALLOWED is no longer defined. This behavior is the default.
1486 The name was removed from Include/code.h.
1488 - PEP 308: conditional expressions were added: (x if cond else y).
1491 - The copy module now "copies" function objects (as atomic objects).
1492 - dict.__getitem__ now looks for a __missing__ hook before raising
1495 - PEP 343: with statement implemented. Needs ``from __future__ import
1496 with_statement``. Use of 'with' as a variable will generate a warning.
1497 Use of 'as' as a variable will also generate a warning (unless it's
1498 part of an import statement).
1499 The following objects have __context__ methods:
1500 - The built-in file type.
1501 - The thread.LockType type.
1502 - The following types defined by the threading module:
1503 Lock, RLock, Condition, Semaphore, BoundedSemaphore.
1504 - The decimal.Context class.
1506 - Fix the encodings package codec search function to only search
1507 inside its own package. Fixes problem reported in patch #1433198.
1509 Note: Codec packages should implement and register their own
1510 codec search function. PEP 100 has the details.
1512 - PEP 353: Using ``Py_ssize_t`` as the index type.
1514 - ``PYMALLOC_DEBUG`` builds now add ``4*sizeof(size_t)`` bytes of debugging
1515 info to each allocated block, since the ``Py_ssize_t`` changes (PEP 353)
1516 now allow Python to make use of memory blocks exceeding 2**32 bytes for
1517 some purposes on 64-bit boxes. A ``PYMALLOC_DEBUG`` build was limited
1518 to 4-byte allocations before.
1520 - Patch #1400181, fix unicode string formatting to not use the locale.
1521 This is how string objects work. u'%f' could use , instead of .
1522 for the decimal point. Now both strings and unicode always use periods.
1524 - Bug #1244610, #1392915, fix build problem on OpenBSD 3.7 and 3.8.
1525 configure would break checking curses.h.
1527 - Bug #959576: The pwd module is now builtin. This allows Python to be
1528 built on UNIX platforms without $HOME set.
1530 - Bug #1072182, fix some potential problems if characters are signed.
1532 - Bug #889500, fix line number on SyntaxWarning for global declarations.
1534 - Bug #1378022, UTF-8 files with a leading BOM crashed the interpreter.
1536 - Support for converting hex strings to floats no longer works.
1537 This was not portable. float('0x3') now raises a ValueError.
1539 - Patch #1382163: Expose Subversion revision number to Python. New C API
1540 function Py_GetBuildNumber(). New attribute sys.subversion. Build number
1541 is now displayed in interactive prompt banner.
1543 - Implementation of PEP 341 - Unification of try/except and try/finally.
1544 "except" clauses can now be written together with a "finally" clause in
1545 one try statement instead of two nested ones. Patch #1355913.
1547 - Bug #1379994: Builtin unicode_escape and raw_unicode_escape codec
1548 now encodes backslash correctly.
1550 - Patch #1350409: Work around signal handling bug in Visual Studio 2005.
1552 - Bug #1281408: Py_BuildValue now works correctly even with unsigned longs
1555 - SF Bug #1350188, "setdlopenflags" leads to crash upon "import"
1556 It was possible for dlerror() to return a NULL pointer, so
1557 it will now use a default error message in this case.
1559 - Replaced most Unicode charmap codecs with new ones using the
1560 new Unicode translate string feature in the builtin charmap
1561 codec; the codecs were created from the mapping tables available
1562 at ftp.unicode.org and contain a few updates (e.g. the Mac OS
1563 encodings now include a mapping for the Apple logo)
1565 - Added a few more codecs for Mac OS encodings
1567 - Sped up some Unicode operations.
1569 - A new AST parser implementation was completed. The abstract
1570 syntax tree is available for read-only (non-compile) access
1571 to Python code; an _ast module was added.
1573 - SF bug #1167751: fix incorrect code being produced for generator expressions.
1574 The following code now raises a SyntaxError: foo(a = i for i in range(10))
1576 - SF Bug #976608: fix SystemError when mtime of an imported file is -1.
1578 - SF Bug #887946: fix segfault when redirecting stdin from a directory.
1579 Provide a warning when a directory is passed on the command line.
1581 - Fix segfault with invalid coding.
1583 - SF bug #772896: unknown encoding results in MemoryError.
1585 - All iterators now have a Boolean value of True. Formerly, some iterators
1586 supported a __len__() method which evaluated to False when the iterator
1589 - On 64-bit platforms, when __len__() returns a value that cannot be
1590 represented as a C int, raise OverflowError.
1592 - test__locale is skipped on OS X < 10.4 (only partial locale support is
1595 - SF bug #893549: parsing keyword arguments was broken with a few format
1598 - Changes donated by Elemental Security to make it work on AIX 5.3
1599 with IBM's 64-bit compiler (SF patch #1284289). This also closes SF
1600 bug #105470: test_pwd fails on 64bit system (Opteron).
1602 - Changes donated by Elemental Security to make it work on HP-UX 11 on
1603 Itanium2 with HP's 64-bit compiler (SF patch #1225212).
1605 - Disallow keyword arguments for type constructors that don't use them
1606 (fixes bug #1119418).
1608 - Forward UnicodeDecodeError into SyntaxError for source encoding errors.
1610 - SF bug #900092: When tracing (e.g. for hotshot), restore 'return' events for
1611 exceptions that cause a function to exit.
1613 - The implementation of set() and frozenset() was revised to use its
1614 own internal data structure. Memory consumption is reduced by 1/3
1615 and there are modest speed-ups as well. The API is unchanged.
1617 - SF bug #1238681: freed pointer is used in longobject.c:long_pow().
1619 - SF bug #1229429: PyObject_CallMethod failed to decrement some
1620 reference counts in some error exit cases.
1622 - SF bug #1185883: Python's small-object memory allocator took over
1623 a block managed by the platform C library whenever a realloc specified
1624 a small new size. However, there's no portable way to know then how
1625 much of the address space following the pointer is valid, so there's no
1626 portable way to copy data from the C-managed block into Python's
1627 small-object space without risking a memory fault. Python's small-object
1628 realloc now leaves such blocks under the control of the platform C
1631 - SF bug #1232517: An overflow error was not detected properly when
1632 attempting to convert a large float to an int in os.utime().
1634 - SF bug #1224347: hex longs now print with lowercase letters just
1635 like their int counterparts.
1637 - SF bug #1163563: the original fix for bug #1010677 ("thread Module
1638 Breaks PyGILState_Ensure()") broke badly in the case of multiple
1639 interpreter states; back out that fix and do a better job (see
1640 http://mail.python.org/pipermail/python-dev/2005-June/054258.html
1641 for a longer write-up of the problem).
1643 - SF patch #1180995: marshal now uses a binary format by default when
1646 - SF patch #1181301: on platforms that appear to use IEEE 754 floats,
1647 the routines that promise to produce IEEE 754 binary representations
1648 of floats now simply copy bytes around.
1650 - bug #967182: disallow opening files with 'wU' or 'aU' as specified by PEP
1653 - patch #1109424: int, long, float, complex, and unicode now check for the
1654 proper magic slot for type conversions when subclassed. Previously the
1655 magic slot was ignored during conversion. Semantics now match the way
1656 subclasses of str always behaved. int/long/float, conversion of an instance
1657 to the base class has been moved to the proper nb_* magic slot and out of
1659 Thanks Walter D�rwald.
1661 - Descriptors defined in C with a PyGetSetDef structure, where the setter is
1662 NULL, now raise an AttributeError when attempting to set or delete the
1663 attribute. Previously a TypeError was raised, but this was inconsistent
1664 with the equivalent pure-Python implementation.
1666 - It is now safe to call PyGILState_Release() before
1667 PyEval_InitThreads() (note that if there is reason to believe there
1668 are multiple threads around you still must call PyEval_InitThreads()
1669 before using the Python API; this fix is for extension modules that
1670 have no way of knowing if Python is multi-threaded yet).
1672 - Typing Ctrl-C whilst raw_input() was waiting in a build with threads
1673 disabled caused a crash.
1675 - Bug #1165306: instancemethod_new allowed the creation of a method
1676 with im_class == im_self == NULL, which caused a crash when called.
1678 - Move exception finalisation later in the shutdown process - this
1679 fixes the crash seen in bug #1165761
1681 - Added two new builtins, any() and all().
1683 - Defining a class with empty parentheses is now allowed
1684 (e.g., ``class C(): pass`` is no longer a syntax error).
1685 Patch #1176012 added support to the 'parser' module and 'compiler' package
1686 (thanks to logistix for that added support).
1688 - Patch #1115086: Support PY_LONGLONG in structmember.
1690 - Bug #1155938: new style classes did not check that __init__() was
1693 - Patch #802188: Report characters after line continuation character
1694 ('\') with a specific error message.
1696 - Bug #723201: Raise a TypeError for passing bad objects to 'L' format.
1698 - Bug #1124295: the __name__ attribute of file objects was
1699 inadvertently made inaccessible in restricted mode.
1701 - Bug #1074011: closing sys.std{out,err} now causes a flush() and
1704 - min() and max() now support key= arguments with the same meaning as in
1707 - The peephole optimizer now performs simple constant folding in expressions:
1710 - set and frozenset objects can now be marshalled. SF #1098985.
1712 - Bug #1077106: Poor argument checking could cause memory corruption
1713 in calls to os.read().
1715 - The parser did not complain about future statements in illegal
1716 positions. It once again reports a syntax error if a future
1717 statement occurs after anything other than a doc string.
1719 - Change the %s format specifier for str objects so that it returns a
1720 unicode instance if the argument is not an instance of basestring and
1721 calling __str__ on the argument returns a unicode instance.
1723 - Patch #1413181: changed ``PyThreadState_Delete()`` to forget about the
1724 current thread state when the auto-GIL-state machinery knows about
1725 it (since the thread state is being deleted, continuing to remember it
1726 can't help, but can hurt if another thread happens to get created with
1727 the same thread id).
1732 - Patch #1380952: fix SSL objects timing out on consecutive read()s
1734 - Patch #1309579: wait3 and wait4 were added to the posix module.
1736 - Patch #1231053: The audioop module now supports encoding/decoding of alaw.
1737 In addition, the existing ulaw code was updated.
1739 - RFE #567972: Socket objects' family, type and proto properties are
1740 now exposed via new attributes.
1742 - Everything under lib-old was removed. This includes the following modules:
1743 Para, addpack, cmp, cmpcache, codehack, dircmp, dump, find, fmt, grep,
1744 lockfile, newdir, ni, packmail, poly, rand, statcache, tb, tzparse,
1745 util, whatsound, whrandom, zmod
1747 - The following modules were removed: regsub, reconvert, regex, regex_syntax.
1749 - re and sre were swapped, so help(re) provides full help. importing sre
1750 is deprecated. The undocumented re.engine variable no longer exists.
1752 - Bug #1448490: Fixed a bug that ISO-2022 codecs could not handle
1753 SS2 (single-shift 2) escape sequences correctly.
1755 - The unicodedata module was updated to the 4.1 version of the Unicode
1756 database. The 3.2 version is still available as unicodedata.db_3_2_0
1757 for applications that require this specific version (such as IDNA).
1759 - The timing module is no longer built by default. It was deprecated
1760 in PEP 4 in Python 2.0 or earlier.
1762 - Patch 1433928: Added a new type, defaultdict, to the collections module.
1763 This uses the new __missing__ hook behavior added to dict (see above).
1765 - Bug #854823: socketmodule now builds on Sun platforms even when
1766 INET_ADDRSTRLEN is not defined.
1768 - Patch #1393157: os.startfile() now has an optional argument to specify
1769 a "command verb" to invoke on the file.
1771 - Bug #876637, prevent stack corruption when socket descriptor
1772 is larger than FD_SETSIZE.
1774 - Patch #1407135, bug #1424041: harmonize mmap behavior of anonymous memory.
1775 mmap.mmap(-1, size) now returns anonymous memory in both Unix and Windows.
1776 mmap.mmap(0, size) should not be used on Windows for anonymous memory.
1778 - Patch #1422385: The nis module now supports access to domains other
1779 than the system default domain.
1781 - Use Win32 API to implement os.stat/fstat. As a result, subsecond timestamps
1782 are reported, the limit on path name lengths is removed, and stat reports
1783 WindowsError now (instead of OSError).
1785 - Add bsddb.db.DBEnv.set_tx_timestamp allowing time based database recovery.
1787 - Bug #1413192, fix seg fault in bsddb if a transaction was deleted
1790 - Patch #1103116: Basic AF_NETLINK support.
1792 - Bug #1402308, (possible) segfault when using mmap.mmap(-1, ...)
1794 - Bug #1400822, _curses over{lay,write} doesn't work when passing 6 ints.
1795 Also fix ungetmouse() which did not accept arguments properly.
1796 The code now conforms to the documented signature.
1798 - Bug #1400115, Fix segfault when calling curses.panel.userptr()
1799 without prior setting of the userptr.
1801 - Fix 64-bit problems in bsddb.
1803 - Patch #1365916: fix some unsafe 64-bit mmap methods.
1805 - Bug #1290333: Added a workaround for cjkcodecs' _codecs_cn build
1808 - Bug #869197: os.setgroups rejects long integer arguments
1810 - Bug #1346533, select.poll() doesn't raise an error if timeout > sys.maxint
1812 - Bug #1344508, Fix UNIX mmap leaking file descriptors
1814 - Patch #1338314, Bug #1336623: fix tarfile so it can extract
1815 REGTYPE directories from tarfiles written by old programs.
1817 - Patch #1407992, fixes broken bsddb module db associate when using
1818 BerkeleyDB 3.3, 4.0 or 4.1.
1820 - Get bsddb module to build with BerkeleyDB version 4.4
1822 - Get bsddb module to build with BerkeleyDB version 3.2
1824 - Patch #1309009, Fix segfault in pyexpat when the XML document is in latin_1,
1825 but Python incorrectly assumes it is in UTF-8 format
1827 - Fix parse errors in the readline module when compiling without threads.
1829 - Patch #1288833: Removed thread lock from socket.getaddrinfo on
1830 FreeBSD 5.3 and later versions which got thread-safe getaddrinfo(3).
1832 - Patches #1298449 and #1298499: Add some missing checks for error
1833 returns in cStringIO.c.
1835 - Patch #1297028: fix segfault if call type on MultibyteCodec,
1836 MultibyteStreamReader, or MultibyteStreamWriter
1838 - Fix memory leak in posix.access().
1840 - Patch #1213831: Fix typo in unicodedata._getcode.
1842 - Bug #1007046: os.startfile() did not accept unicode strings encoded in
1843 the file system encoding.
1845 - Patch #756021: Special-case socket.inet_aton('255.255.255.255') for
1846 platforms that don't have inet_aton().
1848 - Bug #1215928: Fix bz2.BZ2File.seek() for 64-bit file offsets.
1850 - Bug #1191043: Fix bz2.BZ2File.(x)readlines for files containing one
1851 line without newlines.
1853 - Bug #728515: mmap.resize() now resizes the file on Unix as it did
1856 - Patch #1180695: Add nanosecond stat resolution, and st_gen,
1857 st_birthtime for FreeBSD.
1859 - Patch #1231069: The fcntl.ioctl function now uses the 'I' code for
1860 the request code argument, which results in more C-like behaviour
1861 for large or negative values.
1863 - Bug #1234979: For the argument of thread.Lock.acquire, the Windows
1864 implementation treated all integer values except 1 as false.
1866 - Bug #1194181: bz2.BZ2File didn't handle mode 'U' correctly.
1868 - Patch #1212117: os.stat().st_flags is now accessible as a attribute
1869 if available on the platform.
1871 - Patch #1103951: Expose O_SHLOCK and O_EXLOCK in the posix module if
1872 available on the platform.
1874 - Bug #1166660: The readline module could segfault if hook functions
1875 were set in a different thread than that which called readline.
1877 - collections.deque objects now support a remove() method.
1879 - operator.itemgetter() and operator.attrgetter() now support retrieving
1880 multiple fields. This provides direct support for sorting on multiple
1881 keys (primary, secondary, etc).
1883 - os.access now supports Unicode path names on non-Win32 systems.
1885 - Patches #925152, #1118602: Avoid reading after the end of the buffer
1886 in pyexpat.GetInputContext.
1888 - Patches #749830, #1144555: allow UNIX mmap size to default to current
1891 - Added functional.partial(). See PEP309.
1893 - Patch #1093585: raise a ValueError for negative history items in readline.
1894 {remove_history,replace_history}
1896 - The spwd module has been added, allowing access to the shadow password
1899 - stat_float_times is now True.
1901 - array.array objects are now picklable.
1903 - the cPickle module no longer accepts the deprecated None option in the
1904 args tuple returned by __reduce__().
1906 - itertools.islice() now accepts None for the start and step arguments.
1907 This allows islice() to work more readily with slices:
1908 islice(s.start, s.stop, s.step)
1910 - datetime.datetime() now has a strptime class method which can be used to
1911 create datetime object using a string and format.
1913 - Patch #1117961: Replace the MD5 implementation from RSA Data Security Inc
1914 with the implementation from http://sourceforge.net/projects/libmd5-rfc/.
1919 - Patch #1388073: Numerous __-prefixed attributes of unittest.TestCase have
1920 been renamed to have only a single underscore prefix. This was done to
1921 make subclassing easier.
1923 - PEP 338: new module runpy defines a run_module function to support
1924 executing modules which provide access to source code or a code object
1925 via the PEP 302 import mechanisms.
1927 - The email module's parsedate_tz function now sets the daylight savings
1928 flag to -1 (unknown) since it can't tell from the date whether it should
1931 - Patch #624325: urlparse.urlparse() and urlparse.urlsplit() results
1932 now sport attributes that provide access to the parts of the result.
1934 - Patch #1462498: sgmllib now handles entity and character references
1935 in attribute values.
1937 - Added the sqlite3 package. This is based on pysqlite2.1.3, and provides
1938 a DB-API interface in the standard library. You'll need sqlite 3.0.8 or
1939 later to build this - if you have an earlier version, the C extension
1940 module will not be built.
1942 - Bug #1460340: ``random.sample(dict)`` failed in various ways. Dicts
1943 aren't officially supported here, and trying to use them will probably
1944 raise an exception some day. But dicts have been allowed, and "mostly
1945 worked", so support for them won't go away without warning.
1947 - Bug #1445068: getpass.getpass() can now be given an explicit stream
1948 argument to specify where to write the prompt.
1950 - Patch #1462313, bug #1443328: the pickle modules now can handle classes
1951 that have __private names in their __slots__.
1953 - Bug #1250170: mimetools now handles socket.gethostname() failures gracefully.
1955 - patch #1457316: "setup.py upload" now supports --identity to select the
1956 key to be used for signing the uploaded code.
1958 - Queue.Queue objects now support .task_done() and .join() methods
1959 to make it easier to monitor when daemon threads have completed
1960 processing all enqueued tasks. Patch #1455676.
1962 - popen2.Popen objects now preserve the command in a .cmd attribute.
1964 - Added the ctypes ffi package.
1966 - email 4.0 package now integrated. This is largely the same as the email 3.0
1967 package that was included in Python 2.3, except that PEP 8 module names are
1968 now used (e.g. mail.message instead of email.Message). The MIME classes
1969 have been moved to a subpackage (e.g. email.mime.text instead of
1970 email.MIMEText). The old names are still supported for now. Several
1971 deprecated Message methods have been removed and lots of bugs have been
1972 fixed. More details can be found in the email package documentation.
1974 - Patches #1436130/#1443155: codecs.lookup() now returns a CodecInfo object
1975 (a subclass of tuple) that provides incremental decoders and encoders
1976 (a way to use stateful codecs without the stream API). Python functions
1977 codecs.getincrementaldecoder() and codecs.getincrementalencoder() as well
1978 as C functions PyCodec_IncrementalEncoder() and PyCodec_IncrementalDecoder()
1981 - Patch #1359365: Calling next() on a closed StringIO.String object raises
1982 a ValueError instead of a StopIteration now (like file and cString.String do).
1983 cStringIO.StringIO.isatty() will raise a ValueError now if close() has been
1984 called before (like file and StringIO.StringIO do).
1986 - A regrtest option -w was added to re-run failed tests in verbose mode.
1988 - Patch #1446372: quit and exit can now be called from the interactive
1989 interpreter to exit.
1991 - The function get_count() has been added to the gc module, and gc.collect()
1992 grew an optional 'generation' argument.
1994 - A library msilib to generate Windows Installer files, and a distutils
1995 command bdist_msi have been added.
1997 - PEP 343: new module contextlib.py defines decorator @contextmanager
1998 and helpful context managers nested() and closing().
2000 - The compiler package now supports future imports after the module docstring.
2002 - Bug #1413790: zipfile now sanitizes absolute archive names that are
2003 not allowed by the specs.
2005 - Patch #1215184: FileInput now can be given an opening hook which can
2006 be used to control how files are opened.
2008 - Patch #1212287: fileinput.input() now has a mode parameter for
2009 specifying the file mode input files should be opened with.
2011 - Patch #1215184: fileinput now has a fileno() function for getting the
2012 current file number.
2014 - Patch #1349274: gettext.install() now optionally installs additional
2015 translation functions other than _() in the builtin namespace.
2017 - Patch #1337756: fileinput now accepts Unicode filenames.
2019 - Patch #1373643: The chunk module can now read chunks larger than
2022 - Patch #1417555: SimpleHTTPServer now returns Last-Modified headers.
2024 - Bug #1430298: It is now possible to send a mail with an empty
2025 return address using smtplib.
2027 - Bug #1432260: The names of lambda functions are now properly displayed
2030 - Patch #1412872: zipfile now sets the creator system to 3 (Unix)
2031 unless the system is Win32.
2033 - Patch #1349118: urllib now supports user:pass@ style proxy
2034 specifications, raises IOErrors when proxies for unsupported protocols
2035 are defined, and uses the https proxy on https redirections.
2037 - Bug #902075: urllib2 now supports 'host:port' style proxy specifications.
2039 - Bug #1407902: Add support for sftp:// URIs to urlparse.
2041 - Bug #1371247: Update Windows locale identifiers in locale.py.
2043 - Bug #1394565: SimpleHTTPServer now doesn't choke on query parameters
2046 - Bug #1403410: The warnings module now doesn't get confused
2047 when it can't find out the module name it generates a warning for.
2049 - Patch #1177307: Added a new codec utf_8_sig for UTF-8 with a BOM signature.
2051 - Patch #1157027: cookielib mishandles RFC 2109 cookies in Netscape mode
2053 - Patch #1117398: cookielib.LWPCookieJar and .MozillaCookieJar now raise
2054 LoadError as documented, instead of IOError. For compatibility,
2055 LoadError subclasses IOError.
2057 - Added the hashlib module. It provides secure hash functions for MD5 and
2058 SHA1, 224, 256, 384, and 512. Note that recent developments make the
2059 historic MD5 and SHA1 unsuitable for cryptographic-strength applications.
2060 In <http://mail.python.org/pipermail/python-dev/2005-December/058850.html>
2061 Ronald L. Rivest offered this advice for Python:
2063 "The consensus of researchers in this area (at least as
2064 expressed at the NIST Hash Function Workshop 10/31/05),
2065 is that SHA-256 is a good choice for the time being, but
2066 that research should continue, and other alternatives may
2067 arise from this research. The larger SHA's also seem OK."
2069 - Added a subset of Fredrik Lundh's ElementTree package. Available
2070 modules are xml.etree.ElementTree, xml.etree.ElementPath, and
2071 xml.etree.ElementInclude, from ElementTree 1.2.6.
2073 - Patch #1162825: Support non-ASCII characters in IDLE window titles.
2075 - Bug #1365984: urllib now opens "data:" URLs again.
2077 - Patch #1314396: prevent deadlock for threading.Thread.join() when an exception
2078 is raised within the method itself on a previous call (e.g., passing in an
2081 - Bug #1340337: change time.strptime() to always return ValueError when there
2082 is an error in the format string.
2084 - Patch #754022: Greatly enhanced webbrowser.py (by Oleg Broytmann).
2086 - Bug #729103: pydoc.py: Fix docother() method to accept additional
2089 - Patch #1300515: xdrlib.py: Fix pack_fstring() to really use null bytes
2092 - Bug #1296004: httplib.py: Limit maximal amount of data read from the
2093 socket to avoid a MemoryError on Windows.
2095 - Patch #1166948: locale.py: Prefer LC_ALL, LC_CTYPE and LANG over LANGUAGE
2096 to get the correct encoding.
2098 - Patch #1166938: locale.py: Parse LANGUAGE as a colon separated list of
2101 - Patch #1268314: Cache lines in StreamReader.readlines for performance.
2103 - Bug #1290505: Fix clearing the regex cache for time.strptime().
2105 - Bug #1167128: Fix size of a symlink in a tarfile to be 0.
2107 - Patch #810023: Fix off-by-one bug in urllib.urlretrieve reporthook
2110 - Bug #1163178: Make IDNA return an empty string when the input is empty.
2112 - Patch #848017: Make Cookie more RFC-compliant. Use CRLF as default output
2113 separator and do not output trailing semicolon.
2115 - Patch #1062060: urllib.urlretrieve() now raises a new exception, named
2116 ContentTooShortException, when the actually downloaded size does not
2117 match the Content-Length header.
2119 - Bug #1121494: distutils.dir_utils.mkpath now accepts Unicode strings.
2121 - Bug #1178484: Return complete lines from codec stream readers
2122 even if there is an exception in later lines, resulting in
2123 correct line numbers for decoding errors in source code.
2125 - Bug #1192315: Disallow negative arguments to clear() in pdb.
2127 - Patch #827386: Support absolute source paths in msvccompiler.py.
2129 - Patch #1105730: Apply the new implementation of commonprefix in posixpath
2130 to ntpath, macpath, os2emxpath and riscospath.
2132 - Fix a problem in Tkinter introduced by SF patch #869468: delete bogus
2133 __hasattr__ and __delattr__ methods on class Tk that were breaking
2136 - Bug #1015140: disambiguated the term "article id" in nntplib docs and
2137 docstrings to either "article number" or "message id".
2139 - Bug #1238170: threading.Thread.__init__ no longer has "kwargs={}" as a
2140 parameter, but uses the usual "kwargs=None".
2142 - textwrap now processes text chunks at O(n) speed instead of O(n**2).
2143 Patch #1209527 (Contributed by Connelly).
2145 - urllib2 has now an attribute 'httpresponses' mapping from HTTP status code
2146 to W3C name (404 -> 'Not Found'). RFE #1216944.
2148 - Bug #1177468: Don't cache the /dev/urandom file descriptor for os.urandom,
2149 as this can cause problems with apps closing all file descriptors.
2151 - Bug #839151: Fix an attempt to access sys.argv in the warnings module;
2152 it can be missing in embedded interpreters
2154 - Bug #1155638: Fix a bug which affected HTTP 0.9 responses in httplib.
2156 - Bug #1100201: Cross-site scripting was possible on BaseHTTPServer via
2159 - Bug #1108948: Cookie.py produced invalid JavaScript code.
2161 - The tokenize module now detects and reports indentation errors.
2164 - The tokenize module has a new untokenize() function to support a full
2165 roundtrip from lexed tokens back to Python source code. In addition,
2166 the generate_tokens() function now accepts a callable argument that
2167 terminates by raising StopIteration.
2169 - Bug #1196315: fix weakref.WeakValueDictionary constructor.
2171 - Bug #1213894: os.path.realpath didn't resolve symlinks that were the first
2172 component of the path.
2174 - Patch #1120353: The xmlrpclib module provides better, more transparent,
2175 support for datetime.{datetime,date,time} objects. With use_datetime set
2176 to True, applications shouldn't have to fiddle with the DateTime wrapper
2179 - distutils.commands.upload was added to support uploading distribution
2182 - distutils.commands.register now encodes the data as UTF-8 before posting
2185 - decimal operator and comparison methods now return NotImplemented
2186 instead of raising a TypeError when interacting with other types. This
2187 allows other classes to implement __radd__ style methods and have them
2190 - Bug #1163325: Decimal infinities failed to hash. Attempting to
2191 hash a NaN raised an InvalidOperation instead of a TypeError.
2193 - Patch #918101: Add tarfile open mode r|* for auto-detection of the
2194 stream compression; add, for symmetry reasons, r:* as a synonym of r.
2196 - Patch #1043890: Add extractall method to tarfile.
2198 - Patch #1075887: Don't require MSVC in distutils if there is nothing
2201 - Patch #1103407: Properly deal with tarfile iterators when untarring
2202 symbolic links on Windows.
2204 - Patch #645894: Use getrusage for computing the time consumption in
2205 profile.py if available.
2207 - Patch #1046831: Use get_python_version where appropriate in sysconfig.py.
2209 - Patch #1117454: Remove code to special-case cookies without values
2212 - Patch #1117339: Add cookielib special name tests.
2214 - Patch #1112812: Make bsddb/__init__.py more friendly for modulefinder.
2216 - Patch #1110248: SYNC_FLUSH the zlib buffer for GZipFile.flush.
2218 - Patch #1107973: Allow to iterate over the lines of a tarfile.ExFileObject.
2220 - Patch #1104111: Alter setup.py --help and --help-commands.
2222 - Patch #1121234: Properly cleanup _exit and tkerror commands.
2224 - Patch #1049151: xdrlib now unpacks booleans as True or False.
2226 - Fixed bug in a NameError bug in cookielib. Patch #1116583.
2228 - Applied a security fix to SimpleXMLRPCserver (PSF-2005-001). This
2229 disables recursive traversal through instance attributes, which can
2230 be exploited in various ways.
2232 - Bug #1222790: in SimpleXMLRPCServer, set the reuse-address and close-on-exec
2233 flags on the HTTP listening socket.
2235 - Bug #792570: SimpleXMLRPCServer had problems if the request grew too large.
2236 Fixed by reading the HTTP body in chunks instead of one big socket.read().
2238 - Patches #893642, #1039083: add allow_none, encoding arguments to
2239 constructors of SimpleXMLRPCServer and CGIXMLRPCRequestHandler.
2241 - Bug #1110478: Revert os.environ.update to do putenv again.
2243 - Bug #1103844: fix distutils.install.dump_dirs() with negated options.
2245 - os.{SEEK_SET, SEEK_CUR, SEEK_END} have been added for convenience.
2247 - Enhancements to the csv module:
2249 + Dialects are now validated by the underlying C code, better
2250 reflecting its capabilities, and improving its compliance with
2252 + Dialect parameter parsing has been re-implemented to improve error
2254 + quotechar=None and quoting=QUOTE_NONE now work the way PEP 305
2256 + the parser now removes the escapechar prefix from escaped characters.
2257 + when quoting=QUOTE_NONNUMERIC, the writer now tests for numeric
2258 types, rather than any object that can be represented as a numeric.
2259 + when quoting=QUOTE_NONNUMERIC, the reader now casts unquoted fields
2261 + reader now allows \r characters to be quoted (previously it only allowed
2263 + writer doublequote handling improved.
2264 + Dialect classes passed to the module are no longer instantiated by
2265 the module before being parsed (the former validation scheme required
2266 this, but the mechanism was unreliable).
2267 + The dialect registry now contains instances of the internal
2268 C-coded dialect type, rather than references to python objects.
2269 + the internal c-coded dialect type is now immutable.
2270 + register_dialect now accepts the same keyword dialect specifications
2271 as the reader and writer, allowing the user to register dialects
2272 without first creating a dialect class.
2273 + a configurable limit to the size of parsed fields has been added -
2274 previously, an unmatched quote character could result in the entire
2275 file being read into the field buffer before an error was reported.
2276 + A new module method csv.field_size_limit() has been added that sets
2277 the parser field size limit (returning the former limit). The initial
2279 + A line_num attribute has been added to the reader object, which tracks
2280 the number of lines read from the source iterator. This is not
2281 the same as the number of records returned, as records can span
2283 + reader and writer objects were not being registered with the cyclic-GC.
2284 This has been fixed.
2286 - _DummyThread objects in the threading module now delete self.__block that is
2287 inherited from _Thread since it uses up a lock allocated by 'thread'. The
2288 lock primitives tend to be limited in number and thus should not be wasted on
2289 a _DummyThread object. Fixes bug #1089632.
2291 - The imghdr module now detects Exif files.
2293 - StringIO.truncate() now correctly adjusts the size attribute.
2296 - locale.py now uses an updated locale alias table (built using
2297 Tools/i18n/makelocalealias.py, a tool to parse the X11 locale
2298 alias file); the encoding lookup was enhanced to use Python's
2299 encoding alias table.
2301 - moved deprecated modules to Lib/lib-old: whrandom, tzparse, statcache.
2303 - the pickle module no longer accepts the deprecated None option in the
2304 args tuple returned by __reduce__().
2306 - optparse now optionally imports gettext. This allows its use in setup.py.
2308 - the pickle module no longer uses the deprecated bin parameter.
2310 - the shelve module no longer uses the deprecated binary parameter.
2312 - the pstats module no longer uses the deprecated ignore() method.
2314 - the filecmp module no longer uses the deprecated use_statcache argument.
2316 - unittest.TestCase.run() and unittest.TestSuite.run() can now be successfully
2317 extended or overridden by subclasses. Formerly, the subclassed method would
2318 be ignored by the rest of the module. (Bug #1078905).
2320 - heapq.nsmallest() and heapq.nlargest() now support key= arguments with
2321 the same meaning as in list.sort().
2323 - Bug #1076985: ``codecs.StreamReader.readline()`` now calls ``read()`` only
2324 once when a size argument is given. This prevents a buffer overflow in the
2325 tokenizer with very long source lines.
2327 - Bug #1083110: ``zlib.decompress.flush()`` would segfault if called
2328 immediately after creating the object, without any intervening
2329 ``.decompress()`` calls.
2331 - The reconvert.quote function can now emit triple-quoted strings. The
2332 reconvert module now has some simple documentation.
2334 - ``UserString.MutableString`` now supports negative indices in
2335 ``__setitem__`` and ``__delitem__``
2337 - Bug #1149508: ``textwrap`` now handles hyphenated numbers (eg. "2004-03-05")
2340 - Partial fixes for SF bugs #1163244 and #1175396: If a chunk read by
2341 ``codecs.StreamReader.readline()`` has a trailing "\r", read one more
2342 character even if the user has passed a size parameter to get a proper
2343 line ending. Remove the special handling of a "\r\n" that has been split
2346 - Bug #1251300: On UCS-4 builds the "unicode-internal" codec will now complain
2347 about illegal code points. The codec now supports PEP 293 style error
2350 - Bug #1235646: ``codecs.StreamRecoder.next()`` now reencodes the data it reads
2351 from the input stream, so that the output is a byte string in the correct
2352 encoding instead of a unicode string.
2354 - Bug #1202493: Fixing SRE parser to handle '{}' as perl does, rather than
2355 considering it exactly like a '*'.
2357 - Bug #1245379: Add "unicode-1-1-utf-7" as an alias for "utf-7" to
2358 ``encodings.aliases``.
2360 - ` uu.encode()`` and ``uu.decode()`` now support unicode filenames.
2362 - Patch #1413711: Certain patterns of differences were making difflib
2363 touch the recursion limit.
2365 - Bug #947906: An object oriented interface has been added to the calendar
2366 module. It's possible to generate HTML calendar now and the module can be
2367 called as a script (e.g. via ``python -mcalendar``). Localized month and
2368 weekday names can be ouput (even if an exotic encoding is used) using
2369 special classes that use unicode.
2374 - Fix test_float, test_long, and test_struct failures on Tru64 with gcc
2375 by using -mieee gcc option.
2377 - Patch #1432345: Make python compile on DragonFly.
2379 - Build support for Win64-AMD64 was added.
2381 - Patch #1428494: Prefer linking against ncursesw over ncurses library.
2383 - Patch #881820: look for openpty and forkpty also in libbsd.
2385 - The sources of zlib are now part of the Python distribution (zlib 1.2.3).
2386 The zlib module is now builtin on Windows.
2388 - Use -xcode=pic32 for CCSHARED on Solaris with SunPro.
2390 - Bug #1189330: configure did not correctly determine the necessary
2391 value of LINKCC if python was built with GCC 4.0.
2393 - Upgrade Windows build to zlib 1.2.3 which eliminates a potential security
2394 vulnerability in zlib 1.2.1 and 1.2.2.
2396 - EXTRA_CFLAGS has been introduced as an environment variable to hold compiler
2397 flags that change binary compatibility. Changes were also made to
2398 distutils.sysconfig to also use the environment variable when used during
2399 compilation of the interpreter and of C extensions through distutils.
2401 - SF patch 1171735: Darwin 8's headers are anal about POSIX compliance,
2402 and linking has changed (prebinding is now deprecated, and libcc_dynamic
2403 no longer exists). This configure patch makes things right.
2405 - Bug #1158607: Build with --disable-unicode again.
2407 - spwdmodule.c is built only if either HAVE_GETSPNAM or HAVE_HAVE_GETSPENT is
2408 defined. Discovered as a result of not being able to build on OS X.
2410 - setup.py now uses the directories specified in LDFLAGS using the -L option
2411 and in CPPFLAGS using the -I option for adding library and include
2412 directories, respectively, for compiling extension modules against. This has
2413 led to the core being compiled using the values in CPPFLAGS. It also removes
2414 the need for the special-casing of both DarwinPorts and Fink for darwin since
2415 the proper directories can be specified in LDFLAGS (``-L/sw/lib`` for Fink,
2416 ``-L/opt/local/lib`` for DarwinPorts) and CPPFLAGS (``-I/sw/include`` for
2417 Fink, ``-I/opt/local/include`` for DarwinPorts).
2419 - Test in configure.in that checks for tzset no longer dependent on tm->tm_zone
2420 to exist in the struct (not required by either ISO C nor the UNIX 2 spec).
2421 Tests for sanity in tzname when HAVE_TZNAME defined were also defined.
2422 Closes bug #1096244. Thanks Gregory Bond.
2427 - ``PyMem_{Del, DEL}`` and ``PyMem_{Free, FREE}`` no longer map to
2428 ``PyObject_{Free, FREE}``. They map to the system ``free()`` now. If memory
2429 is obtained via the ``PyObject_`` family, it must be released via the
2430 ``PyObject_`` family, and likewise for the ``PyMem_`` family. This has
2431 always been officially true, but when Python's small-object allocator was
2432 introduced, an attempt was made to cater to a few extension modules
2433 discovered at the time that obtained memory via ``PyObject_New`` but
2434 released it via ``PyMem_DEL``. It's years later, and if such code still
2435 exists it will fail now (probably with segfaults, but calling wrong
2436 low-level memory management functions can yield many symptoms).
2438 - Added a C API for set and frozenset objects.
2440 - Removed PyRange_New().
2442 - Patch #1313939: PyUnicode_DecodeCharmap() accepts a unicode string as the
2443 mapping argument now. This string is used as a mapping table. Byte values
2444 greater than the length of the string and 0xFFFE are treated as undefined
2451 - In test_os, st_?time is now truncated before comparing it with ST_?TIME.
2453 - Patch #1276356: New resource "urlfetch" is implemented. This enables
2454 even impatient people to run tests that require remote files.
2460 - Bug #1402224: Add warning to dl docs about crashes.
2462 - Bug #1396471: Document that Windows' ftell() can return invalid
2463 values for text files with UNIX-style line endings.
2465 - Bug #1274828: Document os.path.splitunc().
2467 - Bug #1190204: Clarify which directories are searched by site.py.
2469 - Bug #1193849: Clarify os.path.expanduser() documentation.
2471 - Bug #1243192: re.UNICODE and re.LOCALE affect \d, \D, \s and \S.
2473 - Bug #755617: Document the effects of os.chown() on Windows.
2475 - Patch #1180012: The documentation for modulefinder is now in the library reference.
2477 - Patch #1213031: Document that os.chown() accepts argument values of -1.
2479 - Bug #1190563: Document os.waitpid() return value with WNOHANG flag.
2481 - Bug #1175022: Correct the example code for property().
2483 - Document the IterableUserDict class in the UserDict module.
2484 Closes bug #1166582.
2486 - Remove all latent references for "Macintosh" that referred to semantics for
2487 Mac OS 9 and change to reflect the state for OS X.
2488 Closes patch #1095802. Thanks Jack Jansen.
2497 - FreeBSD 7 support is added.
2503 - Created Misc/Vim/vim_syntax.py to auto-generate a python.vim file in that
2504 directory for syntax highlighting in Vim. Vim directory was added and placed
2505 vimrc to it (was previous up a level).
2507 - Added two new files to Tools/scripts: pysource.py, which recursively
2508 finds Python source files, and findnocoding.py, which finds Python
2509 source files that need an encoding declaration.
2510 Patch #784089, credits to Oleg Broytmann.
2512 - Bug #1072853: pindent.py used an uninitialized variable.
2514 - Patch #1177597: Correct Complex.__init__.
2516 - Fixed a display glitch in Pynche, which could cause the right arrow to
2517 wiggle over by a pixel.
2521 **(For information about older versions, consult the HISTORY file.)**