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7 What's New in Python 2.6 alpha 1?
8 =================================
10 *Release date: XX-XXX-200X*
15 - Patch #1586791: Better exception messages for some operations on strings,
18 - Bug #1067760: Deprecate passing floats to file.seek.
20 - Bug #1591996: Correctly forward exception in instance_contains().
22 - Bug #1588287: fix invalid assertion for `1,2` in debug builds.
24 - Bug #1576657: when setting a KeyError for a tuple key, make sure that
25 the tuple isn't used as the "exception arguments tuple".
27 - Bug #1565514, SystemError not raised on too many nested blocks.
29 - Bug #1576174: WindowsError now displays the windows error code
30 again, no longer the posix error code.
32 - Patch #1549049: Support long values in structmember, issue warnings
33 if the assigned value for structmember fields gets truncated.
35 - Update the peephole optimizer to remove more dead code (jumps after returns)
36 and inline unconditional jumps to returns.
38 - Bug #1545497: when given an explicit base, int() did ignore NULs
39 embedded in the string to convert.
41 - Bug #1569998: break inside a try statement (outside a loop) is now
42 recognized and rejected.
44 - list.pop(x) accepts any object x following the __index__ protocol.
46 - Fix some leftovers from the conversion from int to Py_ssize_t
47 (relevant to strings and sequences of more than 2**31 items).
49 - A number of places, including integer negation and absolute value,
50 were fixed to not rely on undefined behaviour of the C compiler
53 - Bug #1566800: make sure that EnvironmentError can be called with any
54 number of arguments, as was the case in Python 2.4.
56 - Patch #1567691: super() and new.instancemethod() now don't accept
57 keyword arguments any more (previously they accepted them, but didn't
60 - Fix a bug in the parser's future statement handling that led to "with"
61 not being recognized as a keyword after, e.g., this statement:
62 from __future__ import division, with_statement
64 - Bug #1557232: fix seg fault with def f((((x)))) and def f(((x),)).
66 - Fix %zd string formatting on Mac OS X so it prints negative numbers.
68 - Allow exception instances to be directly sliced again.
70 - Bug #1551432: Exceptions do not define an explicit __unicode__ method. This
71 allows calling unicode() on exceptions classes directly to succeed.
73 - Make _PyGILState_NoteThreadState() static, it was not used anywhere
74 outside of pystate.c and should not be necessary.
76 - Bug #1542051: Exceptions now correctly call PyObject_GC_UnTrack.
77 Also make sure that every exception class has __module__ set to
80 - Bug #1550983: emit better error messages for erroneous relative
81 imports (if not in package and if beyond toplevel package).
83 - Overflow checking code in integer division ran afoul of new gcc
84 optimizations. Changed to be more standard-conforming.
86 - Patch #1542451: disallow continue anywhere under a finally.
88 - Patch #1546288: fix seg fault in dict_equal due to ref counting bug.
90 - The return tuple from str.rpartition(sep) is (tail, sep, head) where
91 head is the original string if sep was not found.
93 - Bug #1520864: unpacking singleton tuples in list comprehensions and
94 generator expressions (x for x, in ... ) works again. Fixing this problem
95 required changing the .pyc magic number. This means that .pyc files
96 generated before 2.5c2 will be regenerated.
98 - with and as are now keywords.
104 - Patch #1608267: fix a race condition in os.makedirs() is the directory
105 to be created is already there.
107 - Patch #1610437: fix a tarfile bug with long filename headers.
109 - Patch #1371075: Make ConfigParser accept optional dict type
110 for ordering, sorting, etc.
112 - Bug #1563807: _ctypes built on AIX fails with ld ffi error.
114 - Bug #1598620: A ctypes Structure cannot contain itself.
116 - Patch #1070046: Marshal new-style objects like InstanceType
119 - cStringIO.truncate(-1) now raises an IOError, like StringIO and
122 - Patch #1472877: Fix Tix subwidget name resolution.
124 - Patch #1594554: Always close a tkSimpleDialog on ok(), even
125 if an exception occurs.
127 - Patch #1538878: Don't make tkSimpleDialog dialogs transient if
128 the parent window is withdrawn.
130 - Bug #1597824: return the registered function from atexit.register()
131 to facilitate usage as a decorator.
133 - Patch #1360200: Use unmangled_version RPM spec field to deal with
136 - Patch #1359217: Process 2xx response in an ftplib transfer
137 that precedes an 1xx response.
139 - Patch #1355023: support whence argument for GzipFile.seek.
141 - Patch #1065257: Support passing open files as body in
142 HTTPConnection.request().
144 - Bug #1569790: mailbox.py: Maildir.get_folder() and MH.get_folder()
145 weren't passing the message factory on to newly created Maildir/MH
148 - Patch #1514543: mailbox.py: In the Maildir class, report errors if there's
149 a filename clash instead of possibly losing a message. (Patch by David
152 - Patch #1514544: Try to ensure that messages/indexes have been physically
153 written to disk after calling .flush() or .close(). (Patch by David
156 - Patch #1592250: Add elidge argument to Tkinter.Text.search.
158 - Patch #838546: Make terminal become controlling in pty.fork()
160 - Patch #1351744: Add askyesnocancel helper for tkMessageBox.
162 - Patch #1060577: Extract list of RPM files from spec file in
165 - Bug #1586613: fix zlib and bz2 codecs' incremental en/decoders.
167 - Patch #1583880: fix tarfile's problems with long names and posix/
170 - Bug #1586448: the compiler module now emits the same bytecode for
171 list comprehensions as the builtin compiler, using the LIST_APPEND
174 - Fix codecs.EncodedFile which did not use file_encoding in 2.5.0, and
175 fix all codecs file wrappers to work correctly with the "with"
176 statement (bug #1586513).
178 - Lib/modulefinder.py now handles absolute and relative imports
181 - Patch #1567274: Support SMTP over TLS.
183 - Patch #1560695: Add .note.GNU-stack to ctypes' sysv.S so that
184 ctypes isn't considered as requiring executable stacks.
186 - ctypes callback functions only support 'fundamental' data types as
187 result type. Raise an error when something else is used. This is a
188 partial fix for Bug #1574584.
190 - Fix turtle so that time.sleep is imported for the entire library. Allows
191 the demo2 function to be executed on its own instead of only when the
192 module is run as a script.
194 - Bug #813342: Start the IDLE subprocess with -Qnew if the parent
195 is started with that option.
197 - Bug #1565150: Fix subsecond processing for os.utime on Windows.
199 - Support for MSVC 8 was added to bdist_wininst.
201 - Bug #1446043: correctly raise a LookupError if an encoding name given
202 to encodings.search_function() contains a dot.
204 - Bug #1560617: in pyclbr, return full module name not only for classes,
205 but also for functions.
207 - Bug #1457823: cgi.(Sv)FormContentDict's constructor now takes
208 keep_blank_values and strict_parsing keyword arguments.
210 - Bug #1566602: correct failure of posixpath unittest when $HOME ends
213 - Bug #1565661: in webbrowser, split() the command for the default
214 GNOME browser in case it is a command with args.
216 - Made the error message for time.strptime when the data data and format do
219 - Fix a bug in traceback.format_exception_only() that led to an error
220 being raised when print_exc() was called without an exception set.
221 In version 2.4, this printed "None", restored that behavior.
223 - Make webbrowser.BackgroundBrowser usable in Windows (it wasn't because
224 the close_fds arg to subprocess.Popen is not supported).
226 - Reverted patch #1504333 to sgmllib because it introduced an infinite loop.
228 - Patch #1553314: Fix the inspect.py slowdown that was hurting IPython & SAGE
229 by adding smarter caching in inspect.getmodule()
231 - Fix missing import of the types module in logging.config.
233 - Patch #1550886: Fix decimal module context management implementation
234 to match the localcontext() example from PEP 343.
236 - Bug #1545341: The 'classifier' keyword argument to the Distutils setup()
237 function now accepts tuples as well as lists.
239 - Bug #1541863: uuid.uuid1 failed to generate unique identifiers
240 on systems with low clock resolution.
242 - Bug #1531862: Do not close standard file descriptors in subprocess.
244 - fixed a bug with bsddb.DB.stat: the flags and txn keyword arguments
251 - Patch #1544279: Improve thread-safety of the socket module by moving
252 the sock_addr_t storage out of the socket object.
254 - Speed up function calls into the math module.
256 - Bug #1588217: don't parse "= " as a soft line break in binascii's
257 a2b_qp() function, instead leave it in the string as quopri.decode()
260 - Bug #1599782: Fix segfault on bsddb.db.DB().type().
262 - Bug #1567666: Emulate GetFileAttributesExA for Win95.
264 - Patch #1576166: Support os.utime for directories on Windows NT+.
266 - Bug #1548891: The cStringIO.StringIO() constructor now encodes unicode
267 arguments with the system default encoding just like the write()
268 method does, instead of converting it to a raw buffer.
270 - Patch #1572724: fix typo ('=' instead of '==') in _msi.c.
272 - Bug #1572832: fix a bug in ISO-2022 codecs which may cause segfault
273 when encoding non-BMP unicode characters.
275 - Bug #1556784: allow format strings longer than 127 characters in
276 datetime's strftime function.
278 - Fix itertools.count(n) to work with negative numbers again.
280 - RLIMIT_SBSIZE was added to the resource module where available.
282 - Bug #1551427: fix a wrong NULL pointer check in the win32 version
285 - Bug #1548092: fix curses.tparm seg fault on invalid input.
287 - Bug #1550714: fix SystemError from itertools.tee on negative value for n.
289 - Fixed a few bugs on cjkcodecs:
290 - gbk and gb18030 codec now handle U+30FB KATAKANA MIDDLE DOT correctly.
291 - iso2022_jp_2 codec now encodes into G0 for KS X 1001, GB2312
292 codepoints to conform the standard.
293 - iso2022_jp_3 and iso2022_jp_2004 codec can encode JIS X 0213:2
296 - Bug #1552726: in readline.c, avoid repeatedly polling in interactive
297 mode by only placing a timeout on the select() if an input hook has
298 been defined. This prevents an interactive Python from waking up 10
299 times per second. Patch by Richard Boulton.
305 - Added some tests for modulefinder.
307 - Converted test_imp to use unittest.
309 - Fix bsddb test_basics.test06_Transactions to check the version
316 - Bug #1565919: document set types in the Language Reference.
318 - Bug #1546052: clarify that PyString_FromString(AndSize) copies the
319 string pointed to by its parameter.
321 - Bug #1566663: remove obsolete example from datetime docs.
323 - Bug #1541682: Fix example in the "Refcount details" API docs.
324 Additionally, remove a faulty example showing PySequence_SetItem applied
325 to a newly created list object and add notes that this isn't a good idea.
331 - Patch #1552024: add decorator support to unparse.py demo script.
333 - Make auto-generated python.vim file list built-ins and exceptions in
334 alphatbetical order. Makes output more deterministic and easier to tell if
335 the file is stale or not.
337 - Bug #1546372: Fixed small bugglet in pybench that caused a missing
338 file not to get reported properly.
344 - Disable _XOPEN_SOURCE on NetBSD 1.x.
346 - configure now checks whether gcc supports the PyArg_ParseTuple format
349 - Bug #1578513: Cross compilation was broken by a change to configure.
350 Repair so that it's back to how it was in 2.4.3.
352 - Patch #1576954: Update VC6 build directory; remove redundant
355 - Bug #1568842: Fix test for uintptr_t.
357 - Patch #1540470, for OpenBSD 4.0.
359 - Fix build failure on kfreebsd and on the hurd.
361 - Fix the build of the library reference in info format.
367 - Bug #1542693: remove semi-colon at end of PyImport_ImportModuleEx macro
368 so it can be used as an expression.
374 - Conditionalize definition of _CRT_SECURE_NO_DEPRECATE
375 and _CRT_NONSTDC_NO_DEPRECATE.
382 What's New in Python 2.5 release candidate 1?
383 =============================================
385 *Release date: 17-AUG-2006*
390 - Unicode objects will no longer raise an exception when being
391 compared equal or unequal to a string and a UnicodeDecodeError
392 exception occurs, e.g. as result of a decoding failure.
394 Instead, the equal (==) and unequal (!=) comparison operators will
395 now issue a UnicodeWarning and interpret the two objects as
396 unequal. The UnicodeWarning can be filtered as desired using
397 the warning framework, e.g. silenced completely, turned into an
398 exception, logged, etc.
400 Note that compare operators other than equal and unequal will still
401 raise UnicodeDecodeError exceptions as they've always done.
403 - Fix segfault when doing string formatting on subclasses of long.
405 - Fix bug related to __len__ functions using values > 2**32 on 64-bit machines
406 with new-style classes.
408 - Fix bug related to __len__ functions returning negative values with
411 - Patch #1538606, Fix __index__() clipping. There were some problems
412 discovered with the API and how integers that didn't fit into Py_ssize_t
413 were handled. This patch attempts to provide enough alternatives
414 to effectively use __index__.
416 - Bug #1536021: __hash__ may now return long int; the final hash
417 value is obtained by invoking hash on the long int.
419 - Bug #1536786: buffer comparison could emit a RuntimeWarning.
421 - Bug #1535165: fixed a segfault in input() and raw_input() when
424 - On Windows, the PyErr_Warn function is now exported from
425 the Python dll again.
427 - Bug #1191458: tracing over for loops now produces a line event
428 on each iteration. Fixing this problem required changing the .pyc
429 magic number. This means that .pyc files generated before 2.5c1
432 - Bug #1333982: string/number constants were inappropriately stored
433 in the byte code and co_consts even if they were not used, ie
434 immediately popped off the stack.
436 - Fixed a reference-counting problem in property().
442 - Fix a bug in the ``compiler`` package that caused invalid code to be
443 generated for generator expressions.
445 - The distutils version has been changed to 2.5.0. The change to
446 keep it programmatically in sync with the Python version running
447 the code (introduced in 2.5b3) has been reverted. It will continue
448 to be maintained manually as static string literal.
450 - If the Python part of a ctypes callback function returns None,
451 and this cannot be converted to the required C type, an exception is
452 printed with PyErr_WriteUnraisable. Before this change, the C
453 callback returned arbitrary values to the calling code.
455 - The __repr__ method of a NULL ctypes.py_object() no longer raises
458 - uuid.UUID now has a bytes_le attribute. This returns the UUID in
459 little-endian byte order for Windows. In addition, uuid.py gained some
460 workarounds for clocks with low resolution, to stop the code yielding
463 - Patch #1540892: site.py Quitter() class attempts to close sys.stdin
464 before raising SystemExit, allowing IDLE to honor quit() and exit().
466 - Bug #1224621: make tabnanny recognize IndentationErrors raised by tokenize.
468 - Patch #1536071: trace.py should now find the full module name of a
469 file correctly even on Windows.
471 - logging's atexit hook now runs even if the rest of the module has
472 already been cleaned up.
474 - Bug #1112549, fix DoS attack on cgi.FieldStorage.
476 - Bug #1531405, format_exception no longer raises an exception if
477 str(exception) raised an exception.
479 - Fix a bug in the ``compiler`` package that caused invalid code to be
480 generated for nested functions.
486 - Patch #1511317: don't crash on invalid hostname (alias) info.
488 - Patch #1535500: fix segfault in BZ2File.writelines and make sure it
489 raises the correct exceptions.
491 - Patch # 1536908: enable building ctypes on OpenBSD/AMD64. The
492 '-no-stack-protector' compiler flag for OpenBSD has been removed.
494 - Patch #1532975 was applied, which fixes Bug #1533481: ctypes now
495 uses the _as_parameter_ attribute when objects are passed to foreign
496 function calls. The ctypes version number was changed to 1.0.1.
498 - Bug #1530559, struct.pack raises TypeError where it used to convert.
499 Passing float arguments to struct.pack when integers are expected
500 now triggers a DeprecationWarning.
506 - test_socketserver should now work on cygwin and not fail sporadically
509 - test_mailbox should now work on cygwin versions 2006-08-10 and later.
511 - Bug #1535182: really test the xreadlines() method of bz2 objects.
513 - test_threading now skips testing alternate thread stack sizes on
514 platforms that don't support changing thread stack size.
520 - Patch #1534922: unittest docs were corrected and enhanced.
526 - Bug #1535502, build _hashlib on Windows, and use masm assembler
529 - Bug #1534738, win32 debug version of _msi should be _msi_d.pyd.
531 - Bug #1530448, ctypes build failure on Solaris 10 was fixed.
537 - New API for Unicode rich comparisons: PyUnicode_RichCompare()
539 - Bug #1069160. Internal correctness changes were made to
540 ``PyThreadState_SetAsyncExc()``. A test case was added, and
541 the documentation was changed to state that the return value
542 is always 1 (normal) or 0 (if the specified thread wasn't found).
545 What's New in Python 2.5 beta 3?
546 ================================
548 *Release date: 03-AUG-2006*
553 - _PyWeakref_GetWeakrefCount() now returns a Py_ssize_t; it previously
554 returned a long (see PEP 353).
556 - Bug #1515471: string.replace() accepts character buffers again.
558 - Add PyErr_WarnEx() so C code can pass the stacklevel to warnings.warn().
559 This provides the proper warning for struct.pack().
560 PyErr_Warn() is now deprecated in favor of PyErr_WarnEx().
562 - Patch #1531113: Fix augmented assignment with yield expressions.
563 Also fix a SystemError when trying to assign to yield expressions.
565 - Bug #1529871: The speed enhancement patch #921466 broke Python's compliance
566 with PEP 302. This was fixed by adding an ``imp.NullImporter`` type that is
567 used in ``sys.path_importer_cache`` to cache non-directory paths and avoid
568 excessive filesystem operations during imports.
570 - Bug #1521947: When checking for overflow, ``PyOS_strtol()`` used some
571 operations on signed longs that are formally undefined by C.
572 Unfortunately, at least one compiler now cares about that, so complicated
573 the code to make that compiler happy again.
575 - Bug #1524310: Properly report errors from FindNextFile in os.listdir.
577 - Patch #1232023: Stop including current directory in search
580 - Fix some potential crashes found with failmalloc.
582 - Fix warnings reported by Klocwork's static analysis tool.
584 - Bug #1512814, Fix incorrect lineno's when code within a function
585 had more than 255 blank lines.
587 - Patch #1521179: Python now accepts the standard options ``--help`` and
588 ``--version`` as well as ``/?`` on Windows.
590 - Bug #1520864: unpacking singleton tuples in a 'for' loop (for x, in) works
591 again. Fixing this problem required changing the .pyc magic number.
592 This means that .pyc files generated before 2.5b3 will be regenerated.
594 - Bug #1524317: Compiling Python ``--without-threads`` failed.
595 The Python core compiles again, and, in a build without threads, the
596 new ``sys._current_frames()`` returns a dictionary with one entry,
597 mapping the faux "thread id" 0 to the current frame.
599 - Bug #1525447: build on MacOS X on a case-sensitive filesystem.
605 - Correction of patch #1455898: In the mbcs decoder, set final=False
606 for stream decoder, but final=True for the decode function.
608 - os.urandom no longer masks unrelated exceptions like SystemExit or
611 - Bug #1525866: Don't copy directory stat times in
612 shutil.copytree on Windows
614 - Bug #1002398: The documentation for os.path.sameopenfile now correctly
615 refers to file descriptors, not file objects.
617 - The renaming of the xml package to xmlcore, and the import hackery done
618 to make it appear at both names, has been removed. Bug #1511497,
619 #1513611, and probably others.
621 - Bug #1441397: The compiler module now recognizes module and function
622 docstrings correctly as it did in Python 2.4.
624 - Bug #1529297: The rewrite of doctest for Python 2.4 unintentionally
625 lost that tests are sorted by name before being run. This rarely
626 matters for well-written tests, but can create baffling symptoms if
627 side effects from one test to the next affect outcomes. ``DocTestFinder``
628 has been changed to sort the list of tests it returns.
630 - The distutils version has been changed to 2.5.0, and is now kept
631 in sync with sys.version_info[:3].
633 - Bug #978833: Really close underlying socket in _socketobject.close.
635 - Bug #1459963: urllib and urllib2 now normalize HTTP header names with
638 - Patch #1525766: In pkgutil.walk_packages, correctly pass the onerror callback
639 to recursive calls and call it with the failing package name.
641 - Bug #1525817: Don't truncate short lines in IDLE's tool tips.
643 - Patch #1515343: Fix printing of deprecated string exceptions with a
644 value in the traceback module.
646 - Resync optparse with Optik 1.5.3: minor tweaks for/to tests.
648 - Patch #1524429: Use repr() instead of backticks in Tkinter again.
650 - Bug #1520914: Change time.strftime() to accept a zero for any position in its
651 argument tuple. For arguments where zero is illegal, the value is forced to
652 the minimum value that is correct. This is to support an undocumented but
653 common way people used to fill in inconsequential information in the time
656 - Patch #1220874: Update the binhex module for Mach-O.
658 - The email package has improved RFC 2231 support, specifically for
659 recognizing the difference between encoded (name*0*=<blah>) and non-encoded
660 (name*0=<blah>) parameter continuations. This may change the types of
661 values returned from email.message.Message.get_param() and friends.
662 Specifically in some cases where non-encoded continuations were used,
663 get_param() used to return a 3-tuple of (None, None, string) whereas now it
664 will just return the string (since non-encoded continuations don't have
665 charset and language parts).
667 Also, whereas % values were decoded in all parameter continuations, they are
668 now only decoded in encoded parameter parts.
670 - Bug #1517990: IDLE keybindings on MacOS X now work correctly
672 - Bug #1517996: IDLE now longer shows the default Tk menu when a
673 path browser, class browser or debugger is the frontmost window on MacOS X
675 - Patch #1520294: Support for getset and member descriptors in types.py,
676 inspect.py, and pydoc.py. Specifically, this allows for querying the type
677 of an object against these built-in types and more importantly, for getting
678 their docstrings printed in the interactive interpreter's help() function.
684 - Patch #1519025 and bug #926423: If a KeyboardInterrupt occurs during
685 a socket operation on a socket with a timeout, the exception will be
686 caught correctly. Previously, the exception was not caught.
688 - Patch #1529514: The _ctypes extension is now compiled on more
689 openbsd target platforms.
691 - The ``__reduce__()`` method of the new ``collections.defaultdict`` had
692 a memory leak, affecting pickles and deep copies.
694 - Bug #1471938: Fix curses module build problem on Solaris 8; patch by
697 - Patch #1448199: Release interpreter lock in _winreg.ConnectRegistry.
699 - Patch #1521817: Index range checking on ctypes arrays containing
700 exactly one element enabled again. This allows iterating over these
701 arrays, without the need to check the array size before.
703 - Bug #1521375: When the code in ctypes.util.find_library was
704 run with root privileges, it could overwrite or delete
705 /dev/null in certain cases; this is now fixed.
707 - Bug #1467450: On Mac OS X 10.3, RTLD_GLOBAL is now used as the
708 default mode for loading shared libraries in ctypes.
710 - Because of a misspelled preprocessor symbol, ctypes was always
711 compiled without thread support; this is now fixed.
713 - pybsddb Bug #1527939: bsddb module DBEnv dbremove and dbrename
714 methods now allow their database parameter to be None as the
715 sleepycat API allows.
717 - Bug #1526460: Fix socketmodule compile on NetBSD as it has a different
718 bluetooth API compared with Linux and FreeBSD.
723 - Bug #1501330: Change test_ossaudiodev to be much more tolerant in terms of
724 how long the test file should take to play. Now accepts taking 2.93 secs
725 (exact time) +/- 10% instead of the hard-coded 3.1 sec.
727 - Patch #1529686: The standard tests ``test_defaultdict``, ``test_iterlen``,
728 ``test_uuid`` and ``test_email_codecs`` didn't actually run any tests when
729 run via ``regrtest.py``. Now they do.
734 - Bug #1439538: Drop usage of test -e in configure as it is not portable.
739 - PythonLauncher now works correctly when the path to the script contains
740 characters that are treated specially by the shell (such as quotes).
742 - Bug #1527397: PythonLauncher now launches scripts with the working directory
743 set to the directory that contains the script instead of the user home
744 directory. That latter was an implementation accident and not what users
748 What's New in Python 2.5 beta 2?
749 ================================
751 *Release date: 11-JUL-2006*
756 - Bug #1441486: The literal representation of -(sys.maxint - 1)
757 again evaluates to a int object, not a long.
759 - Bug #1501934: The scope of global variables that are locally assigned
760 using augmented assignment is now correctly determined.
762 - Bug #927248: Recursive method-wrapper objects can now safely
765 - Bug #1417699: Reject locale-specific decimal point in float()
768 - Bug #1511381: codec_getstreamcodec() in codec.c is corrected to
769 omit a default "error" argument for NULL pointer. This allows
770 the parser to take a codec from cjkcodecs again.
772 - Bug #1519018: 'as' is now validated properly in import statements.
774 - On 64 bit systems, int literals that use less than 64 bits are
775 now ints rather than longs.
777 - Bug #1512814, Fix incorrect lineno's when code at module scope
778 started after line 256.
780 - New function ``sys._current_frames()`` returns a dict mapping thread
781 id to topmost thread stack frame. This is for expert use, and is
782 especially useful for debugging application deadlocks. The functionality
783 was previously available in Fazal Majid's ``threadframe`` extension
784 module, but it wasn't possible to do this in a wholly threadsafe way from
790 - Bug #1257728: Mention Cygwin in distutils error message about a missing
793 - Patch #1519566: Update turtle demo, make begin_fill idempotent.
795 - Bug #1508010: msvccompiler now requires the DISTUTILS_USE_SDK
796 environment variable to be set in order to the SDK environment
797 for finding the compiler, include files, etc.
799 - Bug #1515998: Properly generate logical ids for files in bdist_msi.
801 - warnings.py now ignores ImportWarning by default
803 - string.Template() now correctly handles tuple-values. Previously,
804 multi-value tuples would raise an exception and single-value tuples would
805 be treated as the value they contain, instead.
807 - Bug #822974: Honor timeout in telnetlib.{expect,read_until}
808 even if some data are received.
810 - Bug #1267547: Put proper recursive setup.py call into the
811 spec file generated by bdist_rpm.
813 - Bug #1514693: Update turtle's heading when switching between
816 - Reimplement turtle.circle using a polyline, to allow correct
819 - Bug #1514703: Only setup canvas window in turtle when the canvas
822 - Bug #1513223: .close() of a _socketobj now releases the underlying
823 socket again, which then gets closed as it becomes unreferenced.
825 - Bug #1504333: Make sgmllib support angle brackets in quoted
828 - Bug #853506: Fix IPv6 address parsing in unquoted attributes in
829 sgmllib ('[' and ']' were not accepted).
831 - Fix a bug in the turtle module's end_fill function.
833 - Bug #1510580: The 'warnings' module improperly required that a Warning
834 category be either a types.ClassType and a subclass of Warning. The proper
835 check is just that it is a subclass with Warning as the documentation states.
837 - The compiler module now correctly compiles the new try-except-finally
838 statement (bug #1509132).
840 - The wsgiref package is now installed properly on Unix.
842 - A bug was fixed in logging.config.fileConfig() which caused a crash on
843 shutdown when fileConfig() was called multiple times.
845 - The sqlite3 module did cut off data from the SQLite database at the first
846 null character before sending it to a custom converter. This has been fixed
852 - #1494314: Fix a regression with high-numbered sockets in 2.4.3. This
853 means that select() on sockets > FD_SETSIZE (typically 1024) work again.
854 The patch makes sockets use poll() internally where available.
856 - Assigning None to pointer type fields in ctypes structures possible
857 overwrote the wrong fields, this is fixed now.
859 - Fixed a segfault in _ctypes when ctypes.wintypes were imported
860 on non-Windows platforms.
862 - Bug #1518190: The ctypes.c_void_p constructor now accepts any
863 integer or long, without range checking.
865 - Patch #1517790: It is now possible to use custom objects in the ctypes
866 foreign function argtypes sequence as long as they provide a from_param
867 method, no longer is it required that the object is a ctypes type.
869 - The '_ctypes' extension module now works when Python is configured
870 with the --without-threads option.
872 - Bug #1513646: os.access on Windows now correctly determines write
875 - Bug #1512695: cPickle.loads could crash if it was interrupted with
878 - Bug #1296433: parsing XML with a non-default encoding and
879 a CharacterDataHandler could crash the interpreter in pyexpat.
881 - Patch #1516912: improve Modules support for OpenVMS.
886 - Automate Windows build process for the Win64 SSL module.
888 - 'configure' now detects the zlib library the same way as distutils.
889 Previously, the slight difference could cause compilation errors of the
890 'zlib' module on systems with more than one version of zlib.
892 - The MSI compileall step was fixed to also support a TARGETDIR
895 - Bug #1517388: sqlite3.dll is now installed on Windows independent
898 - Bug #1513032: 'make install' failed on FreeBSD 5.3 due to lib-old
899 trying to be installed even though it's empty.
904 - Call os.waitpid() at the end of tests that spawn child processes in order
905 to minimize resources (zombies).
910 - Cover ImportWarning, PendingDeprecationWarning and simplefilter() in the
911 documentation for the warnings module.
913 - Patch #1509163: MS Toolkit Compiler no longer available.
915 - Patch #1504046: Add documentation for xml.etree.
918 What's New in Python 2.5 beta 1?
919 ================================
921 *Release date: 20-JUN-2006*
926 - Patch #1507676: Error messages returned by invalid abstract object operations
927 (such as iterating over an integer) have been improved and now include the
928 type of the offending object to help with debugging.
930 - Bug #992017: A classic class that defined a __coerce__() method that returned
931 its arguments swapped would infinitely recurse and segfault the interpreter.
933 - Fix the socket tests so they can be run concurrently.
935 - Removed 5 integers from C frame objects (PyFrameObject).
936 f_nlocals, f_ncells, f_nfreevars, f_stack_size, f_restricted.
938 - Bug #532646: object.__call__() will continue looking for the __call__
939 attribute on objects until one without one is found. This leads to recursion
940 when you take a class and set its __call__ attribute to an instance of the
941 class. Originally fixed for classic classes, but this fix is for new-style.
942 Removes the infinite_rec_3 crasher.
944 - The string and unicode methods startswith() and endswith() now accept
945 a tuple of prefixes/suffixes to look for. Implements RFE #1491485.
947 - Buffer objects, at the C level, never used the char buffer
948 implementation even when the char buffer for the wrapped object was
949 explicitly requested (originally returned the read or write buffer).
950 Now a TypeError is raised if the char buffer is not present but is
953 - Patch #1346214: Statements like "if 0: suite" are now again optimized
954 away like they were in Python 2.4.
956 - Builtin exceptions are now full-blown new-style classes instead of
957 instances pretending to be classes, which speeds up exception handling
958 by about 80% in comparison to 2.5a2.
960 - Patch #1494554: Update unicodedata.numeric and unicode.isnumeric to
963 - Patch #921466: sys.path_importer_cache is now used to cache valid and
964 invalid file paths for the built-in import machinery which leads to
965 fewer open calls on startup.
967 - Patch #1442927: ``long(str, base)`` is now up to 6x faster for non-power-
968 of-2 bases. The largest speedup is for inputs with about 1000 decimal
969 digits. Conversion from non-power-of-2 bases remains quadratic-time in
970 the number of input digits (it was and remains linear-time for bases
973 - Bug #1334662: ``int(string, base)`` could deliver a wrong answer
974 when ``base`` was not 2, 4, 8, 10, 16 or 32, and ``string`` represented
975 an integer close to ``sys.maxint``. This was repaired by patch
976 #1335972, which also gives a nice speedup.
978 - Patch #1337051: reduced size of frame objects.
980 - PyErr_NewException now accepts a tuple of base classes as its
983 - Patch #876206: function call speedup by retaining allocated frame
986 - Bug #1462152: file() now checks more thoroughly for invalid mode
987 strings and removes a possible "U" before passing the mode to the
990 - Patch #1488312, Fix memory alignment problem on SPARC in unicode
992 - Bug #1487966: Fix SystemError with conditional expression in assignment
994 - WindowsError now has two error code attributes: errno, which carries
995 the error values from errno.h, and winerror, which carries the error
996 values from winerror.h. Previous versions put the winerror.h values
997 (from GetLastError()) into the errno attribute.
999 - Patch #1475845: Raise IndentationError for unexpected indent.
1001 - Patch #1479181: split open() and file() from being aliases for each other.
1003 - Patch #1497053 & bug #1275608: Exceptions occurring in ``__eq__()``
1004 methods were always silently ignored by dictionaries when comparing keys.
1005 They are now passed through (except when using the C API function
1006 ``PyDict_GetItem()``, whose semantics did not change).
1008 - Bug #1456209: In some obscure cases it was possible for a class with a
1009 custom ``__eq__()`` method to confuse dict internals when class instances
1010 were used as a dict's keys and the ``__eq__()`` method mutated the dict.
1011 No, you don't have any code that did this ;-)
1016 - Bug #1295808: expat symbols should be namespaced in pyexpat
1018 - Patch #1462338: Upgrade pyexpat to expat 2.0.0
1020 - Change binascii.hexlify to accept a read-only buffer instead of only a char
1021 buffer and actually follow its documentation.
1023 - Fixed a potentially invalid memory access of CJKCodecs' shift-jis decoder.
1025 - Patch #1478788 (modified version): The functional extension module has
1026 been renamed to _functools and a functools Python wrapper module added.
1027 This provides a home for additional function related utilities that are
1028 not specifically about functional programming. See PEP 309.
1030 - Patch #1493701: performance enhancements for struct module.
1032 - Patch #1490224: time.altzone is now set correctly on Cygwin.
1034 - Patch #1435422: zlib's compress and decompress objects now have a
1037 - Patch #1454481: thread stack size is now tunable at runtime for thread
1038 enabled builds on Windows and systems with Posix threads support.
1040 - On Win32, os.listdir now supports arbitrarily-long Unicode path names
1041 (up to the system limit of 32K characters).
1043 - Use Win32 API to implement os.{access,chdir,chmod,mkdir,remove,rename,rmdir,utime}.
1044 As a result, these functions now raise WindowsError instead of OSError.
1046 - ``time.clock()`` on Win64 should use the high-performance Windows
1047 ``QueryPerformanceCounter()`` now (as was already the case on 32-bit
1050 - Calling Tk_Init twice is refused if the first call failed as that
1053 - bsddb: added the DB_ARCH_REMOVE flag and fixed db.DBEnv.log_archive() to
1054 accept it without potentially using an uninitialized pointer.
1056 - bsddb: added support for the DBEnv.log_stat() and DBEnv.lsn_reset() methods
1057 assuming BerkeleyDB >= 4.0 and 4.4 respectively. [pybsddb project SF
1058 patch numbers 1494885 and 1494902]
1060 - bsddb: added an interface for the BerkeleyDB >= 4.3 DBSequence class.
1061 [pybsddb project SF patch number 1466734]
1063 - bsddb: fix DBCursor.pget() bug with keyword argument names when no data
1064 parameter is supplied. [SF pybsddb bug #1477863]
1066 - bsddb: the __len__ method of a DB object has been fixed to return correct
1067 results. It could previously incorrectly return 0 in some cases.
1068 Fixes SF bug 1493322 (pybsddb bug 1184012).
1070 - bsddb: the bsddb.dbtables Modify method now raises the proper error and
1071 aborts the db transaction safely when a modifier callback fails.
1072 Fixes SF python patch/bug #1408584.
1074 - bsddb: multithreaded DB access using the simple bsddb module interface
1075 now works reliably. It has been updated to use automatic BerkeleyDB
1076 deadlock detection and the bsddb.dbutils.DeadlockWrap wrapper to retry
1077 database calls that would previously deadlock. [SF python bug #775414]
1079 - Patch #1446489: add support for the ZIP64 extensions to zipfile.
1081 - Patch #1506645: add Python wrappers for the curses functions
1082 is_term_resized, resize_term and resizeterm.
1087 - Patch #815924: Restore ability to pass type= and icon= in tkMessageBox
1090 - Patch #812986: Update turtle output even if not tracing.
1092 - Patch #1494750: Destroy master after deleting children in
1095 - Patch #1096231: Add ``default`` argument to Tkinter.Wm.wm_iconbitmap.
1097 - Patch #763580: Add name and value arguments to Tkinter variable
1100 - Bug #1117556: SimpleHTTPServer now tries to find and use the system's
1101 mime.types file for determining MIME types.
1103 - Bug #1339007: Shelf objects now don't raise an exception in their
1104 __del__ method when initialization failed.
1106 - Patch #1455898: The MBCS codec now supports the incremental mode for
1107 double-byte encodings.
1109 - ``difflib``'s ``SequenceMatcher.get_matching_blocks()`` was changed to
1110 guarantee that adjacent triples in the return list always describe
1111 non-adjacent blocks. Previously, a pair of matching blocks could end
1112 up being described by multiple adjacent triples that formed a partition
1113 of the matching pair.
1115 - Bug #1498146: fix optparse to handle Unicode strings in option help,
1116 description, and epilog.
1118 - Bug #1366250: minor optparse documentation error.
1120 - Bug #1361643: fix textwrap.dedent() so it handles tabs appropriately;
1123 - The wsgiref package has been added to the standard library.
1125 - The functions update_wrapper() and wraps() have been added to the functools
1126 module. These make it easier to copy relevant metadata from the original
1127 function when writing wrapper functions.
1129 - The optional ``isprivate`` argument to ``doctest.testmod()``, and the
1130 ``doctest.is_private()`` function, both deprecated in 2.4, were removed.
1132 - Patch #1359618: Speed up charmap encoder by using a trie structure
1135 - The functions in the ``pprint`` module now sort dictionaries by key
1136 before computing the display. Before 2.5, ``pprint`` sorted a dictionary
1137 if and only if its display required more than one line, although that
1138 wasn't documented. The new behavior increases predictability; e.g.,
1139 using ``pprint.pprint(a_dict)`` in a doctest is now reliable.
1141 - Patch #1497027: try HTTP digest auth before basic auth in urllib2
1142 (thanks for J. J. Lee).
1144 - Patch #1496206: improve urllib2 handling of passwords with respect to
1145 default HTTP and HTTPS ports.
1147 - Patch #1080727: add "encoding" parameter to doctest.DocFileSuite.
1149 - Patch #1281707: speed up gzip.readline.
1151 - Patch #1180296: Two new functions were added to the locale module:
1152 format_string() to get the effect of "format % items" but locale-aware,
1153 and currency() to format a monetary number with currency sign.
1155 - Patch #1486962: Several bugs in the turtle Tk demo module were fixed
1156 and several features added, such as speed and geometry control.
1158 - Patch #1488881: add support for external file objects in bz2 compressed
1161 - Patch #721464: pdb.Pdb instances can now be given explicit stdin and
1162 stdout arguments, making it possible to redirect input and output
1163 for remote debugging.
1165 - Patch #1484695: Update the tarfile module to version 0.8. This fixes
1166 a couple of issues, notably handling of long file names using the
1167 GNU LONGNAME extension.
1169 - Patch #1478292. ``doctest.register_optionflag(name)`` shouldn't create a
1170 new flag when ``name`` is already the name of an option flag.
1172 - Bug #1385040: don't allow "def foo(a=1, b): pass" in the compiler
1175 - Patch #1472854: make the rlcompleter.Completer class usable on non-
1178 - Patch #1470846: fix urllib2 ProxyBasicAuthHandler.
1180 - Bug #1472827: correctly escape newlines and tabs in attribute values in
1181 the saxutils.XMLGenerator class.
1187 - Bug #1502728: Correctly link against librt library on HP-UX.
1189 - OpenBSD 3.9 is supported now.
1191 - Patch #1492356: Port to Windows CE.
1193 - Bug/Patch #1481770: Use .so extension for shared libraries on HP-UX for ia64.
1195 - Patch #1471883: Add --enable-universalsdk.
1211 What's New in Python 2.5 alpha 2?
1212 =================================
1214 *Release date: 27-APR-2006*
1219 - Bug #1465834: 'bdist_wininst preinstall script support' was fixed
1220 by converting these apis from macros into exported functions again:
1222 PyParser_SimpleParseFile PyParser_SimpleParseString PyRun_AnyFile
1223 PyRun_AnyFileEx PyRun_AnyFileFlags PyRun_File PyRun_FileEx
1224 PyRun_FileFlags PyRun_InteractiveLoop PyRun_InteractiveOne
1225 PyRun_SimpleFile PyRun_SimpleFileEx PyRun_SimpleString
1226 PyRun_String Py_CompileString
1228 - Under COUNT_ALLOCS, types are not necessarily immortal anymore.
1230 - All uses of PyStructSequence_InitType have been changed to initialize
1231 the type objects only once, even if the interpreter is initialized
1234 - Bug #1454485, array.array('u') could crash the interpreter. This was
1235 due to PyArgs_ParseTuple(args, 'u#', ...) trying to convert buffers (strings)
1236 to unicode when it didn't make sense. 'u#' now requires a unicode string.
1238 - Py_UNICODE is unsigned. It was always documented as unsigned, but
1239 due to a bug had a signed value in previous versions.
1241 - Patch #837242: ``id()`` of any Python object always gives a positive
1242 number now, which might be a long integer. ``PyLong_FromVoidPtr`` and
1243 ``PyLong_AsVoidPtr`` have been changed accordingly. Note that it has
1244 never been correct to implement a ``__hash()__`` method that returns the
1245 ``id()`` of an object:
1248 return id(self) # WRONG
1250 because a hash result must be a (short) Python int but it was always
1251 possible for ``id()`` to return a Python long. However, because ``id()``
1252 could return negative values before, on a 32-bit box an ``id()`` result
1253 was always usable as a hash value before this patch. That's no longer
1256 - Python on OS X 10.3 and above now uses dlopen() (via dynload_shlib.c)
1257 to load extension modules and now provides the dl module. As a result,
1258 sys.setdlopenflags() now works correctly on these systems. (SF patch
1261 - Patch #1463867: enhanced garbage collection to allow cleanup of cycles
1262 involving generators that have paused outside of any ``try`` or ``with``
1263 blocks. (In 2.5a1, a paused generator that was part of a reference
1264 cycle could not be garbage collected, regardless of whether it was
1265 paused in a ``try`` or ``with`` block.)
1270 - Patch #1191065: Fix preprocessor problems on systems where recvfrom
1273 - Bug #1467952: os.listdir() now correctly raises an error if readdir()
1274 fails with an error condition.
1276 - Fixed bsddb.db.DBError derived exceptions so they can be unpickled.
1278 - Bug #1117761: bsddb.*open() no longer raises an exception when using
1279 the cachesize parameter.
1281 - Bug #1149413: bsddb.*open() no longer raises an exception when using
1282 a temporary db (file=None) with the 'n' flag to truncate on open.
1284 - Bug #1332852: bsddb module minimum BerkeleyDB version raised to 3.3
1285 as older versions cause excessive test failures.
1287 - Patch #1062014: AF_UNIX sockets under Linux have a special
1288 abstract namespace that is now fully supported.
1293 - Bug #1223937: subprocess.CalledProcessError reports the exit status
1294 of the process using the returncode attribute, instead of
1297 - Patch #1475231: ``doctest`` has a new ``SKIP`` option, which causes
1298 a doctest to be skipped (the code is not run, and the expected output
1299 or exception is ignored).
1301 - Fixed contextlib.nested to cope with exceptions being raised and
1302 caught inside exit handlers.
1304 - Updated optparse module to Optik 1.5.1 (allow numeric constants in
1305 hex, octal, or binary; add ``append_const`` action; keep going if
1306 gettext cannot be imported; added ``OptionParser.destroy()`` method;
1307 added ``epilog`` for better help generation).
1309 - Bug #1473760: ``tempfile.TemporaryFile()`` could hang on Windows, when
1310 called from a thread spawned as a side effect of importing a module.
1312 - The pydoc module now supports documenting packages contained in
1315 - The pkgutil module now has several new utility functions, such
1316 as ``walk_packages()`` to support working with packages that are either
1317 in the filesystem or zip files.
1319 - The mailbox module can now modify and delete messages from
1320 mailboxes, in addition to simply reading them. Thanks to Gregory
1321 K. Johnson for writing the code, and to the 2005 Google Summer of
1322 Code for funding his work.
1324 - The ``__del__`` method of class ``local`` in module ``_threading_local``
1325 returned before accomplishing any of its intended cleanup.
1327 - Patch #790710: Add breakpoint command lists in pdb.
1329 - Patch #1063914: Add Tkinter.Misc.clipboard_get().
1331 - Patch #1191700: Adjust column alignment in bdb breakpoint lists.
1333 - SimpleXMLRPCServer relied on the fcntl module, which is unavailable on
1334 Windows. Bug #1469163.
1336 - The warnings, linecache, inspect, traceback, site, and doctest modules
1337 were updated to work correctly with modules imported from zipfiles or
1338 via other PEP 302 __loader__ objects.
1340 - Patch #1467770: Reduce usage of subprocess._active to processes which
1341 the application hasn't waited on.
1343 - Patch #1462222: Fix Tix.Grid.
1345 - Fix exception when doing glob.glob('anything*/')
1347 - The pstats.Stats class accepts an optional stream keyword argument to
1348 direct output to an alternate file-like object.
1353 - The Makefile now has a reindent target, which runs reindent.py on
1356 - Patch #1470875: Building Python with MS Free Compiler
1358 - Patch #1161914: Add a python-config script.
1360 - Patch #1324762:Remove ccpython.cc; replace --with-cxx with
1361 --with-cxx-main. Link with C++ compiler only if --with-cxx-main was
1362 specified. (Can be overridden by explicitly setting LINKCC.) Decouple
1363 CXX from --with-cxx-main, see description in README.
1365 - Patch #1429775: Link extension modules with the shared libpython.
1367 - Fixed a libffi build problem on MIPS systems.
1369 - ``PyString_FromFormat``, ``PyErr_Format``, and ``PyString_FromFormatV``
1370 now accept formats "%u" for unsigned ints, "%lu" for unsigned longs,
1371 and "%zu" for unsigned integers of type ``size_t``.
1376 - test_contextlib now checks contextlib.nested can cope with exceptions
1377 being raised and caught inside exit handlers.
1379 - test_cmd_line now checks operation of the -m and -c command switches
1381 - The test_contextlib test in 2.5a1 wasn't actually run unless you ran
1382 it separately and by hand. It also wasn't cleaning up its changes to
1383 the current Decimal context.
1385 - regrtest.py now has a -M option to run tests that test the new limits of
1386 containers, on 64-bit architectures. Running these tests is only sensible
1387 on 64-bit machines with more than two gigabytes of memory. The argument
1388 passed is the maximum amount of memory for the tests to use.
1393 - Added the Python benchmark suite pybench to the Tools/ directory;
1394 contributed by Marc-Andre Lemburg.
1399 - Patch #1473132: Improve docs for ``tp_clear`` and ``tp_traverse``.
1401 - PEP 343: Added Context Types section to the library reference
1402 and attempted to bring other PEP 343 related documentation into
1403 line with the implementation and/or python-dev discussions.
1405 - Bug #1337990: clarified that ``doctest`` does not support examples
1406 requiring both expected output and an exception.
1409 What's New in Python 2.5 alpha 1?
1410 =================================
1412 *Release date: 05-APR-2006*
1417 - PEP 338: -m command line switch now delegates to runpy.run_module
1418 allowing it to support modules in packages and zipfiles
1420 - On Windows, .DLL is not an accepted file name extension for
1421 extension modules anymore; extensions are only found if they
1424 - Bug #1421664: sys.stderr.encoding is now set to the same value as
1425 sys.stdout.encoding.
1427 - __import__ accepts keyword arguments.
1429 - Patch #1460496: round() now accepts keyword arguments.
1431 - Fixed bug #1459029 - unicode reprs were double-escaped.
1433 - Patch #1396919: The system scope threads are reenabled on FreeBSD
1434 5.4 and later versions.
1436 - Bug #1115379: Compiling a Unicode string with an encoding declaration
1437 now gives a SyntaxError.
1439 - Previously, Python code had no easy way to access the contents of a
1440 cell object. Now, a ``cell_contents`` attribute has been added
1441 (closes patch #1170323).
1443 - Patch #1123430: Python's small-object allocator now returns an arena to
1444 the system ``free()`` when all memory within an arena becomes unused
1445 again. Prior to Python 2.5, arenas (256KB chunks of memory) were never
1446 freed. Some applications will see a drop in virtual memory size now,
1447 especially long-running applications that, from time to time, temporarily
1448 use a large number of small objects. Note that when Python returns an
1449 arena to the platform C's ``free()``, there's no guarantee that the
1450 platform C library will in turn return that memory to the operating system.
1451 The effect of the patch is to stop making that impossible, and in tests it
1452 appears to be effective at least on Microsoft C and gcc-based systems.
1453 Thanks to Evan Jones for hard work and patience.
1455 - Patch #1434038: property() now uses the getter's docstring if there is
1456 no "doc" argument given. This makes it possible to legitimately use
1457 property() as a decorator to produce a read-only property.
1459 - PEP 357, patch 1436368: add an __index__ method to int/long and a matching
1460 nb_index slot to the PyNumberMethods struct. The slot is consulted instead
1461 of requiring an int or long in slicing and a few other contexts, enabling
1462 other objects (e.g. Numeric Python's integers) to be used as slice indices.
1464 - Fixed various bugs reported by Coverity's Prevent tool.
1466 - PEP 352, patch #1104669: Make exceptions new-style objects. Introduced the
1467 new exception base class, BaseException, which has a new message attribute.
1468 KeyboardInterrupt and SystemExit to directly inherit from BaseException now.
1469 Raising a string exception now raises a DeprecationWarning.
1471 - Patch #1438387, PEP 328: relative and absolute imports. Imports can now be
1472 explicitly relative, using 'from .module import name' to mean 'from the same
1473 package as this module is in. Imports without dots still default to the
1474 old relative-then-absolute, unless 'from __future__ import
1475 absolute_import' is used.
1477 - Properly check if 'warnings' raises an exception (usually when a filter set
1478 to "error" is triggered) when raising a warning for raising string
1481 - CO_GENERATOR_ALLOWED is no longer defined. This behavior is the default.
1482 The name was removed from Include/code.h.
1484 - PEP 308: conditional expressions were added: (x if cond else y).
1487 - The copy module now "copies" function objects (as atomic objects).
1488 - dict.__getitem__ now looks for a __missing__ hook before raising
1491 - PEP 343: with statement implemented. Needs ``from __future__ import
1492 with_statement``. Use of 'with' as a variable will generate a warning.
1493 Use of 'as' as a variable will also generate a warning (unless it's
1494 part of an import statement).
1495 The following objects have __context__ methods:
1496 - The built-in file type.
1497 - The thread.LockType type.
1498 - The following types defined by the threading module:
1499 Lock, RLock, Condition, Semaphore, BoundedSemaphore.
1500 - The decimal.Context class.
1502 - Fix the encodings package codec search function to only search
1503 inside its own package. Fixes problem reported in patch #1433198.
1505 Note: Codec packages should implement and register their own
1506 codec search function. PEP 100 has the details.
1508 - PEP 353: Using ``Py_ssize_t`` as the index type.
1510 - ``PYMALLOC_DEBUG`` builds now add ``4*sizeof(size_t)`` bytes of debugging
1511 info to each allocated block, since the ``Py_ssize_t`` changes (PEP 353)
1512 now allow Python to make use of memory blocks exceeding 2**32 bytes for
1513 some purposes on 64-bit boxes. A ``PYMALLOC_DEBUG`` build was limited
1514 to 4-byte allocations before.
1516 - Patch #1400181, fix unicode string formatting to not use the locale.
1517 This is how string objects work. u'%f' could use , instead of .
1518 for the decimal point. Now both strings and unicode always use periods.
1520 - Bug #1244610, #1392915, fix build problem on OpenBSD 3.7 and 3.8.
1521 configure would break checking curses.h.
1523 - Bug #959576: The pwd module is now builtin. This allows Python to be
1524 built on UNIX platforms without $HOME set.
1526 - Bug #1072182, fix some potential problems if characters are signed.
1528 - Bug #889500, fix line number on SyntaxWarning for global declarations.
1530 - Bug #1378022, UTF-8 files with a leading BOM crashed the interpreter.
1532 - Support for converting hex strings to floats no longer works.
1533 This was not portable. float('0x3') now raises a ValueError.
1535 - Patch #1382163: Expose Subversion revision number to Python. New C API
1536 function Py_GetBuildNumber(). New attribute sys.subversion. Build number
1537 is now displayed in interactive prompt banner.
1539 - Implementation of PEP 341 - Unification of try/except and try/finally.
1540 "except" clauses can now be written together with a "finally" clause in
1541 one try statement instead of two nested ones. Patch #1355913.
1543 - Bug #1379994: Builtin unicode_escape and raw_unicode_escape codec
1544 now encodes backslash correctly.
1546 - Patch #1350409: Work around signal handling bug in Visual Studio 2005.
1548 - Bug #1281408: Py_BuildValue now works correctly even with unsigned longs
1551 - SF Bug #1350188, "setdlopenflags" leads to crash upon "import"
1552 It was possible for dlerror() to return a NULL pointer, so
1553 it will now use a default error message in this case.
1555 - Replaced most Unicode charmap codecs with new ones using the
1556 new Unicode translate string feature in the builtin charmap
1557 codec; the codecs were created from the mapping tables available
1558 at ftp.unicode.org and contain a few updates (e.g. the Mac OS
1559 encodings now include a mapping for the Apple logo)
1561 - Added a few more codecs for Mac OS encodings
1563 - Sped up some Unicode operations.
1565 - A new AST parser implementation was completed. The abstract
1566 syntax tree is available for read-only (non-compile) access
1567 to Python code; an _ast module was added.
1569 - SF bug #1167751: fix incorrect code being produced for generator expressions.
1570 The following code now raises a SyntaxError: foo(a = i for i in range(10))
1572 - SF Bug #976608: fix SystemError when mtime of an imported file is -1.
1574 - SF Bug #887946: fix segfault when redirecting stdin from a directory.
1575 Provide a warning when a directory is passed on the command line.
1577 - Fix segfault with invalid coding.
1579 - SF bug #772896: unknown encoding results in MemoryError.
1581 - All iterators now have a Boolean value of True. Formerly, some iterators
1582 supported a __len__() method which evaluated to False when the iterator
1585 - On 64-bit platforms, when __len__() returns a value that cannot be
1586 represented as a C int, raise OverflowError.
1588 - test__locale is skipped on OS X < 10.4 (only partial locale support is
1591 - SF bug #893549: parsing keyword arguments was broken with a few format
1594 - Changes donated by Elemental Security to make it work on AIX 5.3
1595 with IBM's 64-bit compiler (SF patch #1284289). This also closes SF
1596 bug #105470: test_pwd fails on 64bit system (Opteron).
1598 - Changes donated by Elemental Security to make it work on HP-UX 11 on
1599 Itanium2 with HP's 64-bit compiler (SF patch #1225212).
1601 - Disallow keyword arguments for type constructors that don't use them
1602 (fixes bug #1119418).
1604 - Forward UnicodeDecodeError into SyntaxError for source encoding errors.
1606 - SF bug #900092: When tracing (e.g. for hotshot), restore 'return' events for
1607 exceptions that cause a function to exit.
1609 - The implementation of set() and frozenset() was revised to use its
1610 own internal data structure. Memory consumption is reduced by 1/3
1611 and there are modest speed-ups as well. The API is unchanged.
1613 - SF bug #1238681: freed pointer is used in longobject.c:long_pow().
1615 - SF bug #1229429: PyObject_CallMethod failed to decrement some
1616 reference counts in some error exit cases.
1618 - SF bug #1185883: Python's small-object memory allocator took over
1619 a block managed by the platform C library whenever a realloc specified
1620 a small new size. However, there's no portable way to know then how
1621 much of the address space following the pointer is valid, so there's no
1622 portable way to copy data from the C-managed block into Python's
1623 small-object space without risking a memory fault. Python's small-object
1624 realloc now leaves such blocks under the control of the platform C
1627 - SF bug #1232517: An overflow error was not detected properly when
1628 attempting to convert a large float to an int in os.utime().
1630 - SF bug #1224347: hex longs now print with lowercase letters just
1631 like their int counterparts.
1633 - SF bug #1163563: the original fix for bug #1010677 ("thread Module
1634 Breaks PyGILState_Ensure()") broke badly in the case of multiple
1635 interpreter states; back out that fix and do a better job (see
1636 http://mail.python.org/pipermail/python-dev/2005-June/054258.html
1637 for a longer write-up of the problem).
1639 - SF patch #1180995: marshal now uses a binary format by default when
1642 - SF patch #1181301: on platforms that appear to use IEEE 754 floats,
1643 the routines that promise to produce IEEE 754 binary representations
1644 of floats now simply copy bytes around.
1646 - bug #967182: disallow opening files with 'wU' or 'aU' as specified by PEP
1649 - patch #1109424: int, long, float, complex, and unicode now check for the
1650 proper magic slot for type conversions when subclassed. Previously the
1651 magic slot was ignored during conversion. Semantics now match the way
1652 subclasses of str always behaved. int/long/float, conversion of an instance
1653 to the base class has been moved to the proper nb_* magic slot and out of
1655 Thanks Walter D�rwald.
1657 - Descriptors defined in C with a PyGetSetDef structure, where the setter is
1658 NULL, now raise an AttributeError when attempting to set or delete the
1659 attribute. Previously a TypeError was raised, but this was inconsistent
1660 with the equivalent pure-Python implementation.
1662 - It is now safe to call PyGILState_Release() before
1663 PyEval_InitThreads() (note that if there is reason to believe there
1664 are multiple threads around you still must call PyEval_InitThreads()
1665 before using the Python API; this fix is for extension modules that
1666 have no way of knowing if Python is multi-threaded yet).
1668 - Typing Ctrl-C whilst raw_input() was waiting in a build with threads
1669 disabled caused a crash.
1671 - Bug #1165306: instancemethod_new allowed the creation of a method
1672 with im_class == im_self == NULL, which caused a crash when called.
1674 - Move exception finalisation later in the shutdown process - this
1675 fixes the crash seen in bug #1165761
1677 - Added two new builtins, any() and all().
1679 - Defining a class with empty parentheses is now allowed
1680 (e.g., ``class C(): pass`` is no longer a syntax error).
1681 Patch #1176012 added support to the 'parser' module and 'compiler' package
1682 (thanks to logistix for that added support).
1684 - Patch #1115086: Support PY_LONGLONG in structmember.
1686 - Bug #1155938: new style classes did not check that __init__() was
1689 - Patch #802188: Report characters after line continuation character
1690 ('\') with a specific error message.
1692 - Bug #723201: Raise a TypeError for passing bad objects to 'L' format.
1694 - Bug #1124295: the __name__ attribute of file objects was
1695 inadvertently made inaccessible in restricted mode.
1697 - Bug #1074011: closing sys.std{out,err} now causes a flush() and
1700 - min() and max() now support key= arguments with the same meaning as in
1703 - The peephole optimizer now performs simple constant folding in expressions:
1706 - set and frozenset objects can now be marshalled. SF #1098985.
1708 - Bug #1077106: Poor argument checking could cause memory corruption
1709 in calls to os.read().
1711 - The parser did not complain about future statements in illegal
1712 positions. It once again reports a syntax error if a future
1713 statement occurs after anything other than a doc string.
1715 - Change the %s format specifier for str objects so that it returns a
1716 unicode instance if the argument is not an instance of basestring and
1717 calling __str__ on the argument returns a unicode instance.
1719 - Patch #1413181: changed ``PyThreadState_Delete()`` to forget about the
1720 current thread state when the auto-GIL-state machinery knows about
1721 it (since the thread state is being deleted, continuing to remember it
1722 can't help, but can hurt if another thread happens to get created with
1723 the same thread id).
1728 - Patch #1380952: fix SSL objects timing out on consecutive read()s
1730 - Patch #1309579: wait3 and wait4 were added to the posix module.
1732 - Patch #1231053: The audioop module now supports encoding/decoding of alaw.
1733 In addition, the existing ulaw code was updated.
1735 - RFE #567972: Socket objects' family, type and proto properties are
1736 now exposed via new attributes.
1738 - Everything under lib-old was removed. This includes the following modules:
1739 Para, addpack, cmp, cmpcache, codehack, dircmp, dump, find, fmt, grep,
1740 lockfile, newdir, ni, packmail, poly, rand, statcache, tb, tzparse,
1741 util, whatsound, whrandom, zmod
1743 - The following modules were removed: regsub, reconvert, regex, regex_syntax.
1745 - re and sre were swapped, so help(re) provides full help. importing sre
1746 is deprecated. The undocumented re.engine variable no longer exists.
1748 - Bug #1448490: Fixed a bug that ISO-2022 codecs could not handle
1749 SS2 (single-shift 2) escape sequences correctly.
1751 - The unicodedata module was updated to the 4.1 version of the Unicode
1752 database. The 3.2 version is still available as unicodedata.db_3_2_0
1753 for applications that require this specific version (such as IDNA).
1755 - The timing module is no longer built by default. It was deprecated
1756 in PEP 4 in Python 2.0 or earlier.
1758 - Patch 1433928: Added a new type, defaultdict, to the collections module.
1759 This uses the new __missing__ hook behavior added to dict (see above).
1761 - Bug #854823: socketmodule now builds on Sun platforms even when
1762 INET_ADDRSTRLEN is not defined.
1764 - Patch #1393157: os.startfile() now has an optional argument to specify
1765 a "command verb" to invoke on the file.
1767 - Bug #876637, prevent stack corruption when socket descriptor
1768 is larger than FD_SETSIZE.
1770 - Patch #1407135, bug #1424041: harmonize mmap behavior of anonymous memory.
1771 mmap.mmap(-1, size) now returns anonymous memory in both Unix and Windows.
1772 mmap.mmap(0, size) should not be used on Windows for anonymous memory.
1774 - Patch #1422385: The nis module now supports access to domains other
1775 than the system default domain.
1777 - Use Win32 API to implement os.stat/fstat. As a result, subsecond timestamps
1778 are reported, the limit on path name lengths is removed, and stat reports
1779 WindowsError now (instead of OSError).
1781 - Add bsddb.db.DBEnv.set_tx_timestamp allowing time based database recovery.
1783 - Bug #1413192, fix seg fault in bsddb if a transaction was deleted
1786 - Patch #1103116: Basic AF_NETLINK support.
1788 - Bug #1402308, (possible) segfault when using mmap.mmap(-1, ...)
1790 - Bug #1400822, _curses over{lay,write} doesn't work when passing 6 ints.
1791 Also fix ungetmouse() which did not accept arguments properly.
1792 The code now conforms to the documented signature.
1794 - Bug #1400115, Fix segfault when calling curses.panel.userptr()
1795 without prior setting of the userptr.
1797 - Fix 64-bit problems in bsddb.
1799 - Patch #1365916: fix some unsafe 64-bit mmap methods.
1801 - Bug #1290333: Added a workaround for cjkcodecs' _codecs_cn build
1804 - Bug #869197: os.setgroups rejects long integer arguments
1806 - Bug #1346533, select.poll() doesn't raise an error if timeout > sys.maxint
1808 - Bug #1344508, Fix UNIX mmap leaking file descriptors
1810 - Patch #1338314, Bug #1336623: fix tarfile so it can extract
1811 REGTYPE directories from tarfiles written by old programs.
1813 - Patch #1407992, fixes broken bsddb module db associate when using
1814 BerkeleyDB 3.3, 4.0 or 4.1.
1816 - Get bsddb module to build with BerkeleyDB version 4.4
1818 - Get bsddb module to build with BerkeleyDB version 3.2
1820 - Patch #1309009, Fix segfault in pyexpat when the XML document is in latin_1,
1821 but Python incorrectly assumes it is in UTF-8 format
1823 - Fix parse errors in the readline module when compiling without threads.
1825 - Patch #1288833: Removed thread lock from socket.getaddrinfo on
1826 FreeBSD 5.3 and later versions which got thread-safe getaddrinfo(3).
1828 - Patches #1298449 and #1298499: Add some missing checks for error
1829 returns in cStringIO.c.
1831 - Patch #1297028: fix segfault if call type on MultibyteCodec,
1832 MultibyteStreamReader, or MultibyteStreamWriter
1834 - Fix memory leak in posix.access().
1836 - Patch #1213831: Fix typo in unicodedata._getcode.
1838 - Bug #1007046: os.startfile() did not accept unicode strings encoded in
1839 the file system encoding.
1841 - Patch #756021: Special-case socket.inet_aton('255.255.255.255') for
1842 platforms that don't have inet_aton().
1844 - Bug #1215928: Fix bz2.BZ2File.seek() for 64-bit file offsets.
1846 - Bug #1191043: Fix bz2.BZ2File.(x)readlines for files containing one
1847 line without newlines.
1849 - Bug #728515: mmap.resize() now resizes the file on Unix as it did
1852 - Patch #1180695: Add nanosecond stat resolution, and st_gen,
1853 st_birthtime for FreeBSD.
1855 - Patch #1231069: The fcntl.ioctl function now uses the 'I' code for
1856 the request code argument, which results in more C-like behaviour
1857 for large or negative values.
1859 - Bug #1234979: For the argument of thread.Lock.acquire, the Windows
1860 implementation treated all integer values except 1 as false.
1862 - Bug #1194181: bz2.BZ2File didn't handle mode 'U' correctly.
1864 - Patch #1212117: os.stat().st_flags is now accessible as a attribute
1865 if available on the platform.
1867 - Patch #1103951: Expose O_SHLOCK and O_EXLOCK in the posix module if
1868 available on the platform.
1870 - Bug #1166660: The readline module could segfault if hook functions
1871 were set in a different thread than that which called readline.
1873 - collections.deque objects now support a remove() method.
1875 - operator.itemgetter() and operator.attrgetter() now support retrieving
1876 multiple fields. This provides direct support for sorting on multiple
1877 keys (primary, secondary, etc).
1879 - os.access now supports Unicode path names on non-Win32 systems.
1881 - Patches #925152, #1118602: Avoid reading after the end of the buffer
1882 in pyexpat.GetInputContext.
1884 - Patches #749830, #1144555: allow UNIX mmap size to default to current
1887 - Added functional.partial(). See PEP309.
1889 - Patch #1093585: raise a ValueError for negative history items in readline.
1890 {remove_history,replace_history}
1892 - The spwd module has been added, allowing access to the shadow password
1895 - stat_float_times is now True.
1897 - array.array objects are now picklable.
1899 - the cPickle module no longer accepts the deprecated None option in the
1900 args tuple returned by __reduce__().
1902 - itertools.islice() now accepts None for the start and step arguments.
1903 This allows islice() to work more readily with slices:
1904 islice(s.start, s.stop, s.step)
1906 - datetime.datetime() now has a strptime class method which can be used to
1907 create datetime object using a string and format.
1909 - Patch #1117961: Replace the MD5 implementation from RSA Data Security Inc
1910 with the implementation from http://sourceforge.net/projects/libmd5-rfc/.
1915 - Patch #1388073: Numerous __-prefixed attributes of unittest.TestCase have
1916 been renamed to have only a single underscore prefix. This was done to
1917 make subclassing easier.
1919 - PEP 338: new module runpy defines a run_module function to support
1920 executing modules which provide access to source code or a code object
1921 via the PEP 302 import mechanisms.
1923 - The email module's parsedate_tz function now sets the daylight savings
1924 flag to -1 (unknown) since it can't tell from the date whether it should
1927 - Patch #624325: urlparse.urlparse() and urlparse.urlsplit() results
1928 now sport attributes that provide access to the parts of the result.
1930 - Patch #1462498: sgmllib now handles entity and character references
1931 in attribute values.
1933 - Added the sqlite3 package. This is based on pysqlite2.1.3, and provides
1934 a DB-API interface in the standard library. You'll need sqlite 3.0.8 or
1935 later to build this - if you have an earlier version, the C extension
1936 module will not be built.
1938 - Bug #1460340: ``random.sample(dict)`` failed in various ways. Dicts
1939 aren't officially supported here, and trying to use them will probably
1940 raise an exception some day. But dicts have been allowed, and "mostly
1941 worked", so support for them won't go away without warning.
1943 - Bug #1445068: getpass.getpass() can now be given an explicit stream
1944 argument to specify where to write the prompt.
1946 - Patch #1462313, bug #1443328: the pickle modules now can handle classes
1947 that have __private names in their __slots__.
1949 - Bug #1250170: mimetools now handles socket.gethostname() failures gracefully.
1951 - patch #1457316: "setup.py upload" now supports --identity to select the
1952 key to be used for signing the uploaded code.
1954 - Queue.Queue objects now support .task_done() and .join() methods
1955 to make it easier to monitor when daemon threads have completed
1956 processing all enqueued tasks. Patch #1455676.
1958 - popen2.Popen objects now preserve the command in a .cmd attribute.
1960 - Added the ctypes ffi package.
1962 - email 4.0 package now integrated. This is largely the same as the email 3.0
1963 package that was included in Python 2.3, except that PEP 8 module names are
1964 now used (e.g. mail.message instead of email.Message). The MIME classes
1965 have been moved to a subpackage (e.g. email.mime.text instead of
1966 email.MIMEText). The old names are still supported for now. Several
1967 deprecated Message methods have been removed and lots of bugs have been
1968 fixed. More details can be found in the email package documentation.
1970 - Patches #1436130/#1443155: codecs.lookup() now returns a CodecInfo object
1971 (a subclass of tuple) that provides incremental decoders and encoders
1972 (a way to use stateful codecs without the stream API). Python functions
1973 codecs.getincrementaldecoder() and codecs.getincrementalencoder() as well
1974 as C functions PyCodec_IncrementalEncoder() and PyCodec_IncrementalDecoder()
1977 - Patch #1359365: Calling next() on a closed StringIO.String object raises
1978 a ValueError instead of a StopIteration now (like file and cString.String do).
1979 cStringIO.StringIO.isatty() will raise a ValueError now if close() has been
1980 called before (like file and StringIO.StringIO do).
1982 - A regrtest option -w was added to re-run failed tests in verbose mode.
1984 - Patch #1446372: quit and exit can now be called from the interactive
1985 interpreter to exit.
1987 - The function get_count() has been added to the gc module, and gc.collect()
1988 grew an optional 'generation' argument.
1990 - A library msilib to generate Windows Installer files, and a distutils
1991 command bdist_msi have been added.
1993 - PEP 343: new module contextlib.py defines decorator @contextmanager
1994 and helpful context managers nested() and closing().
1996 - The compiler package now supports future imports after the module docstring.
1998 - Bug #1413790: zipfile now sanitizes absolute archive names that are
1999 not allowed by the specs.
2001 - Patch #1215184: FileInput now can be given an opening hook which can
2002 be used to control how files are opened.
2004 - Patch #1212287: fileinput.input() now has a mode parameter for
2005 specifying the file mode input files should be opened with.
2007 - Patch #1215184: fileinput now has a fileno() function for getting the
2008 current file number.
2010 - Patch #1349274: gettext.install() now optionally installs additional
2011 translation functions other than _() in the builtin namespace.
2013 - Patch #1337756: fileinput now accepts Unicode filenames.
2015 - Patch #1373643: The chunk module can now read chunks larger than
2018 - Patch #1417555: SimpleHTTPServer now returns Last-Modified headers.
2020 - Bug #1430298: It is now possible to send a mail with an empty
2021 return address using smtplib.
2023 - Bug #1432260: The names of lambda functions are now properly displayed
2026 - Patch #1412872: zipfile now sets the creator system to 3 (Unix)
2027 unless the system is Win32.
2029 - Patch #1349118: urllib now supports user:pass@ style proxy
2030 specifications, raises IOErrors when proxies for unsupported protocols
2031 are defined, and uses the https proxy on https redirections.
2033 - Bug #902075: urllib2 now supports 'host:port' style proxy specifications.
2035 - Bug #1407902: Add support for sftp:// URIs to urlparse.
2037 - Bug #1371247: Update Windows locale identifiers in locale.py.
2039 - Bug #1394565: SimpleHTTPServer now doesn't choke on query parameters
2042 - Bug #1403410: The warnings module now doesn't get confused
2043 when it can't find out the module name it generates a warning for.
2045 - Patch #1177307: Added a new codec utf_8_sig for UTF-8 with a BOM signature.
2047 - Patch #1157027: cookielib mishandles RFC 2109 cookies in Netscape mode
2049 - Patch #1117398: cookielib.LWPCookieJar and .MozillaCookieJar now raise
2050 LoadError as documented, instead of IOError. For compatibility,
2051 LoadError subclasses IOError.
2053 - Added the hashlib module. It provides secure hash functions for MD5 and
2054 SHA1, 224, 256, 384, and 512. Note that recent developments make the
2055 historic MD5 and SHA1 unsuitable for cryptographic-strength applications.
2056 In <http://mail.python.org/pipermail/python-dev/2005-December/058850.html>
2057 Ronald L. Rivest offered this advice for Python:
2059 "The consensus of researchers in this area (at least as
2060 expressed at the NIST Hash Function Workshop 10/31/05),
2061 is that SHA-256 is a good choice for the time being, but
2062 that research should continue, and other alternatives may
2063 arise from this research. The larger SHA's also seem OK."
2065 - Added a subset of Fredrik Lundh's ElementTree package. Available
2066 modules are xml.etree.ElementTree, xml.etree.ElementPath, and
2067 xml.etree.ElementInclude, from ElementTree 1.2.6.
2069 - Patch #1162825: Support non-ASCII characters in IDLE window titles.
2071 - Bug #1365984: urllib now opens "data:" URLs again.
2073 - Patch #1314396: prevent deadlock for threading.Thread.join() when an exception
2074 is raised within the method itself on a previous call (e.g., passing in an
2077 - Bug #1340337: change time.strptime() to always return ValueError when there
2078 is an error in the format string.
2080 - Patch #754022: Greatly enhanced webbrowser.py (by Oleg Broytmann).
2082 - Bug #729103: pydoc.py: Fix docother() method to accept additional
2085 - Patch #1300515: xdrlib.py: Fix pack_fstring() to really use null bytes
2088 - Bug #1296004: httplib.py: Limit maximal amount of data read from the
2089 socket to avoid a MemoryError on Windows.
2091 - Patch #1166948: locale.py: Prefer LC_ALL, LC_CTYPE and LANG over LANGUAGE
2092 to get the correct encoding.
2094 - Patch #1166938: locale.py: Parse LANGUAGE as a colon separated list of
2097 - Patch #1268314: Cache lines in StreamReader.readlines for performance.
2099 - Bug #1290505: Fix clearing the regex cache for time.strptime().
2101 - Bug #1167128: Fix size of a symlink in a tarfile to be 0.
2103 - Patch #810023: Fix off-by-one bug in urllib.urlretrieve reporthook
2106 - Bug #1163178: Make IDNA return an empty string when the input is empty.
2108 - Patch #848017: Make Cookie more RFC-compliant. Use CRLF as default output
2109 separator and do not output trailing semicolon.
2111 - Patch #1062060: urllib.urlretrieve() now raises a new exception, named
2112 ContentTooShortException, when the actually downloaded size does not
2113 match the Content-Length header.
2115 - Bug #1121494: distutils.dir_utils.mkpath now accepts Unicode strings.
2117 - Bug #1178484: Return complete lines from codec stream readers
2118 even if there is an exception in later lines, resulting in
2119 correct line numbers for decoding errors in source code.
2121 - Bug #1192315: Disallow negative arguments to clear() in pdb.
2123 - Patch #827386: Support absolute source paths in msvccompiler.py.
2125 - Patch #1105730: Apply the new implementation of commonprefix in posixpath
2126 to ntpath, macpath, os2emxpath and riscospath.
2128 - Fix a problem in Tkinter introduced by SF patch #869468: delete bogus
2129 __hasattr__ and __delattr__ methods on class Tk that were breaking
2132 - Bug #1015140: disambiguated the term "article id" in nntplib docs and
2133 docstrings to either "article number" or "message id".
2135 - Bug #1238170: threading.Thread.__init__ no longer has "kwargs={}" as a
2136 parameter, but uses the usual "kwargs=None".
2138 - textwrap now processes text chunks at O(n) speed instead of O(n**2).
2139 Patch #1209527 (Contributed by Connelly).
2141 - urllib2 has now an attribute 'httpresponses' mapping from HTTP status code
2142 to W3C name (404 -> 'Not Found'). RFE #1216944.
2144 - Bug #1177468: Don't cache the /dev/urandom file descriptor for os.urandom,
2145 as this can cause problems with apps closing all file descriptors.
2147 - Bug #839151: Fix an attempt to access sys.argv in the warnings module;
2148 it can be missing in embedded interpreters
2150 - Bug #1155638: Fix a bug which affected HTTP 0.9 responses in httplib.
2152 - Bug #1100201: Cross-site scripting was possible on BaseHTTPServer via
2155 - Bug #1108948: Cookie.py produced invalid JavaScript code.
2157 - The tokenize module now detects and reports indentation errors.
2160 - The tokenize module has a new untokenize() function to support a full
2161 roundtrip from lexed tokens back to Python source code. In addition,
2162 the generate_tokens() function now accepts a callable argument that
2163 terminates by raising StopIteration.
2165 - Bug #1196315: fix weakref.WeakValueDictionary constructor.
2167 - Bug #1213894: os.path.realpath didn't resolve symlinks that were the first
2168 component of the path.
2170 - Patch #1120353: The xmlrpclib module provides better, more transparent,
2171 support for datetime.{datetime,date,time} objects. With use_datetime set
2172 to True, applications shouldn't have to fiddle with the DateTime wrapper
2175 - distutils.commands.upload was added to support uploading distribution
2178 - distutils.commands.register now encodes the data as UTF-8 before posting
2181 - decimal operator and comparison methods now return NotImplemented
2182 instead of raising a TypeError when interacting with other types. This
2183 allows other classes to implement __radd__ style methods and have them
2186 - Bug #1163325: Decimal infinities failed to hash. Attempting to
2187 hash a NaN raised an InvalidOperation instead of a TypeError.
2189 - Patch #918101: Add tarfile open mode r|* for auto-detection of the
2190 stream compression; add, for symmetry reasons, r:* as a synonym of r.
2192 - Patch #1043890: Add extractall method to tarfile.
2194 - Patch #1075887: Don't require MSVC in distutils if there is nothing
2197 - Patch #1103407: Properly deal with tarfile iterators when untarring
2198 symbolic links on Windows.
2200 - Patch #645894: Use getrusage for computing the time consumption in
2201 profile.py if available.
2203 - Patch #1046831: Use get_python_version where appropriate in sysconfig.py.
2205 - Patch #1117454: Remove code to special-case cookies without values
2208 - Patch #1117339: Add cookielib special name tests.
2210 - Patch #1112812: Make bsddb/__init__.py more friendly for modulefinder.
2212 - Patch #1110248: SYNC_FLUSH the zlib buffer for GZipFile.flush.
2214 - Patch #1107973: Allow to iterate over the lines of a tarfile.ExFileObject.
2216 - Patch #1104111: Alter setup.py --help and --help-commands.
2218 - Patch #1121234: Properly cleanup _exit and tkerror commands.
2220 - Patch #1049151: xdrlib now unpacks booleans as True or False.
2222 - Fixed bug in a NameError bug in cookielib. Patch #1116583.
2224 - Applied a security fix to SimpleXMLRPCserver (PSF-2005-001). This
2225 disables recursive traversal through instance attributes, which can
2226 be exploited in various ways.
2228 - Bug #1222790: in SimpleXMLRPCServer, set the reuse-address and close-on-exec
2229 flags on the HTTP listening socket.
2231 - Bug #792570: SimpleXMLRPCServer had problems if the request grew too large.
2232 Fixed by reading the HTTP body in chunks instead of one big socket.read().
2234 - Patches #893642, #1039083: add allow_none, encoding arguments to
2235 constructors of SimpleXMLRPCServer and CGIXMLRPCRequestHandler.
2237 - Bug #1110478: Revert os.environ.update to do putenv again.
2239 - Bug #1103844: fix distutils.install.dump_dirs() with negated options.
2241 - os.{SEEK_SET, SEEK_CUR, SEEK_END} have been added for convenience.
2243 - Enhancements to the csv module:
2245 + Dialects are now validated by the underlying C code, better
2246 reflecting its capabilities, and improving its compliance with
2248 + Dialect parameter parsing has been re-implemented to improve error
2250 + quotechar=None and quoting=QUOTE_NONE now work the way PEP 305
2252 + the parser now removes the escapechar prefix from escaped characters.
2253 + when quoting=QUOTE_NONNUMERIC, the writer now tests for numeric
2254 types, rather than any object that can be represented as a numeric.
2255 + when quoting=QUOTE_NONNUMERIC, the reader now casts unquoted fields
2257 + reader now allows \r characters to be quoted (previously it only allowed
2259 + writer doublequote handling improved.
2260 + Dialect classes passed to the module are no longer instantiated by
2261 the module before being parsed (the former validation scheme required
2262 this, but the mechanism was unreliable).
2263 + The dialect registry now contains instances of the internal
2264 C-coded dialect type, rather than references to python objects.
2265 + the internal c-coded dialect type is now immutable.
2266 + register_dialect now accepts the same keyword dialect specifications
2267 as the reader and writer, allowing the user to register dialects
2268 without first creating a dialect class.
2269 + a configurable limit to the size of parsed fields has been added -
2270 previously, an unmatched quote character could result in the entire
2271 file being read into the field buffer before an error was reported.
2272 + A new module method csv.field_size_limit() has been added that sets
2273 the parser field size limit (returning the former limit). The initial
2275 + A line_num attribute has been added to the reader object, which tracks
2276 the number of lines read from the source iterator. This is not
2277 the same as the number of records returned, as records can span
2279 + reader and writer objects were not being registered with the cyclic-GC.
2280 This has been fixed.
2282 - _DummyThread objects in the threading module now delete self.__block that is
2283 inherited from _Thread since it uses up a lock allocated by 'thread'. The
2284 lock primitives tend to be limited in number and thus should not be wasted on
2285 a _DummyThread object. Fixes bug #1089632.
2287 - The imghdr module now detects Exif files.
2289 - StringIO.truncate() now correctly adjusts the size attribute.
2292 - locale.py now uses an updated locale alias table (built using
2293 Tools/i18n/makelocalealias.py, a tool to parse the X11 locale
2294 alias file); the encoding lookup was enhanced to use Python's
2295 encoding alias table.
2297 - moved deprecated modules to Lib/lib-old: whrandom, tzparse, statcache.
2299 - the pickle module no longer accepts the deprecated None option in the
2300 args tuple returned by __reduce__().
2302 - optparse now optionally imports gettext. This allows its use in setup.py.
2304 - the pickle module no longer uses the deprecated bin parameter.
2306 - the shelve module no longer uses the deprecated binary parameter.
2308 - the pstats module no longer uses the deprecated ignore() method.
2310 - the filecmp module no longer uses the deprecated use_statcache argument.
2312 - unittest.TestCase.run() and unittest.TestSuite.run() can now be successfully
2313 extended or overridden by subclasses. Formerly, the subclassed method would
2314 be ignored by the rest of the module. (Bug #1078905).
2316 - heapq.nsmallest() and heapq.nlargest() now support key= arguments with
2317 the same meaning as in list.sort().
2319 - Bug #1076985: ``codecs.StreamReader.readline()`` now calls ``read()`` only
2320 once when a size argument is given. This prevents a buffer overflow in the
2321 tokenizer with very long source lines.
2323 - Bug #1083110: ``zlib.decompress.flush()`` would segfault if called
2324 immediately after creating the object, without any intervening
2325 ``.decompress()`` calls.
2327 - The reconvert.quote function can now emit triple-quoted strings. The
2328 reconvert module now has some simple documentation.
2330 - ``UserString.MutableString`` now supports negative indices in
2331 ``__setitem__`` and ``__delitem__``
2333 - Bug #1149508: ``textwrap`` now handles hyphenated numbers (eg. "2004-03-05")
2336 - Partial fixes for SF bugs #1163244 and #1175396: If a chunk read by
2337 ``codecs.StreamReader.readline()`` has a trailing "\r", read one more
2338 character even if the user has passed a size parameter to get a proper
2339 line ending. Remove the special handling of a "\r\n" that has been split
2342 - Bug #1251300: On UCS-4 builds the "unicode-internal" codec will now complain
2343 about illegal code points. The codec now supports PEP 293 style error
2346 - Bug #1235646: ``codecs.StreamRecoder.next()`` now reencodes the data it reads
2347 from the input stream, so that the output is a byte string in the correct
2348 encoding instead of a unicode string.
2350 - Bug #1202493: Fixing SRE parser to handle '{}' as perl does, rather than
2351 considering it exactly like a '*'.
2353 - Bug #1245379: Add "unicode-1-1-utf-7" as an alias for "utf-7" to
2354 ``encodings.aliases``.
2356 - ` uu.encode()`` and ``uu.decode()`` now support unicode filenames.
2358 - Patch #1413711: Certain patterns of differences were making difflib
2359 touch the recursion limit.
2361 - Bug #947906: An object oriented interface has been added to the calendar
2362 module. It's possible to generate HTML calendar now and the module can be
2363 called as a script (e.g. via ``python -mcalendar``). Localized month and
2364 weekday names can be ouput (even if an exotic encoding is used) using
2365 special classes that use unicode.
2370 - Fix test_float, test_long, and test_struct failures on Tru64 with gcc
2371 by using -mieee gcc option.
2373 - Patch #1432345: Make python compile on DragonFly.
2375 - Build support for Win64-AMD64 was added.
2377 - Patch #1428494: Prefer linking against ncursesw over ncurses library.
2379 - Patch #881820: look for openpty and forkpty also in libbsd.
2381 - The sources of zlib are now part of the Python distribution (zlib 1.2.3).
2382 The zlib module is now builtin on Windows.
2384 - Use -xcode=pic32 for CCSHARED on Solaris with SunPro.
2386 - Bug #1189330: configure did not correctly determine the necessary
2387 value of LINKCC if python was built with GCC 4.0.
2389 - Upgrade Windows build to zlib 1.2.3 which eliminates a potential security
2390 vulnerability in zlib 1.2.1 and 1.2.2.
2392 - EXTRA_CFLAGS has been introduced as an environment variable to hold compiler
2393 flags that change binary compatibility. Changes were also made to
2394 distutils.sysconfig to also use the environment variable when used during
2395 compilation of the interpreter and of C extensions through distutils.
2397 - SF patch 1171735: Darwin 8's headers are anal about POSIX compliance,
2398 and linking has changed (prebinding is now deprecated, and libcc_dynamic
2399 no longer exists). This configure patch makes things right.
2401 - Bug #1158607: Build with --disable-unicode again.
2403 - spwdmodule.c is built only if either HAVE_GETSPNAM or HAVE_HAVE_GETSPENT is
2404 defined. Discovered as a result of not being able to build on OS X.
2406 - setup.py now uses the directories specified in LDFLAGS using the -L option
2407 and in CPPFLAGS using the -I option for adding library and include
2408 directories, respectively, for compiling extension modules against. This has
2409 led to the core being compiled using the values in CPPFLAGS. It also removes
2410 the need for the special-casing of both DarwinPorts and Fink for darwin since
2411 the proper directories can be specified in LDFLAGS (``-L/sw/lib`` for Fink,
2412 ``-L/opt/local/lib`` for DarwinPorts) and CPPFLAGS (``-I/sw/include`` for
2413 Fink, ``-I/opt/local/include`` for DarwinPorts).
2415 - Test in configure.in that checks for tzset no longer dependent on tm->tm_zone
2416 to exist in the struct (not required by either ISO C nor the UNIX 2 spec).
2417 Tests for sanity in tzname when HAVE_TZNAME defined were also defined.
2418 Closes bug #1096244. Thanks Gregory Bond.
2423 - ``PyMem_{Del, DEL}`` and ``PyMem_{Free, FREE}`` no longer map to
2424 ``PyObject_{Free, FREE}``. They map to the system ``free()`` now. If memory
2425 is obtained via the ``PyObject_`` family, it must be released via the
2426 ``PyObject_`` family, and likewise for the ``PyMem_`` family. This has
2427 always been officially true, but when Python's small-object allocator was
2428 introduced, an attempt was made to cater to a few extension modules
2429 discovered at the time that obtained memory via ``PyObject_New`` but
2430 released it via ``PyMem_DEL``. It's years later, and if such code still
2431 exists it will fail now (probably with segfaults, but calling wrong
2432 low-level memory management functions can yield many symptoms).
2434 - Added a C API for set and frozenset objects.
2436 - Removed PyRange_New().
2438 - Patch #1313939: PyUnicode_DecodeCharmap() accepts a unicode string as the
2439 mapping argument now. This string is used as a mapping table. Byte values
2440 greater than the length of the string and 0xFFFE are treated as undefined
2447 - In test_os, st_?time is now truncated before comparing it with ST_?TIME.
2449 - Patch #1276356: New resource "urlfetch" is implemented. This enables
2450 even impatient people to run tests that require remote files.
2456 - Bug #1402224: Add warning to dl docs about crashes.
2458 - Bug #1396471: Document that Windows' ftell() can return invalid
2459 values for text files with UNIX-style line endings.
2461 - Bug #1274828: Document os.path.splitunc().
2463 - Bug #1190204: Clarify which directories are searched by site.py.
2465 - Bug #1193849: Clarify os.path.expanduser() documentation.
2467 - Bug #1243192: re.UNICODE and re.LOCALE affect \d, \D, \s and \S.
2469 - Bug #755617: Document the effects of os.chown() on Windows.
2471 - Patch #1180012: The documentation for modulefinder is now in the library reference.
2473 - Patch #1213031: Document that os.chown() accepts argument values of -1.
2475 - Bug #1190563: Document os.waitpid() return value with WNOHANG flag.
2477 - Bug #1175022: Correct the example code for property().
2479 - Document the IterableUserDict class in the UserDict module.
2480 Closes bug #1166582.
2482 - Remove all latent references for "Macintosh" that referred to semantics for
2483 Mac OS 9 and change to reflect the state for OS X.
2484 Closes patch #1095802. Thanks Jack Jansen.
2493 - FreeBSD 7 support is added.
2499 - Created Misc/Vim/vim_syntax.py to auto-generate a python.vim file in that
2500 directory for syntax highlighting in Vim. Vim directory was added and placed
2501 vimrc to it (was previous up a level).
2503 - Added two new files to Tools/scripts: pysource.py, which recursively
2504 finds Python source files, and findnocoding.py, which finds Python
2505 source files that need an encoding declaration.
2506 Patch #784089, credits to Oleg Broytmann.
2508 - Bug #1072853: pindent.py used an uninitialized variable.
2510 - Patch #1177597: Correct Complex.__init__.
2512 - Fixed a display glitch in Pynche, which could cause the right arrow to
2513 wiggle over by a pixel.
2517 **(For information about older versions, consult the HISTORY file.)**