blob: 816e3020b205088d0e466b3cdbfbdd2b08480052 [file] [log] [blame]
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001+++++++++++
2Python News
3+++++++++++
4
Anthony Baxterb0c66302004-11-04 05:23:17 +00005(editors: check NEWS.help for information about editing NEWS using ReST.)
6
Benjamin Petersond1735892009-03-07 18:46:21 +00007What's New in Python 3.1 alpha 2?
8=================================
9
10*Release date: XXX*
11
12Core and Builtins
13-----------------
14
Antoine Pitrou3a652b12009-03-23 18:52:06 +000015- Issue #4688: Add a heuristic so that tuples and dicts containing only
16 untrackable objects are not tracked by the garbage collector. This can
17 reduce the size of collections and therefore the garbage collection overhead
18 on long-running programs, depending on their particular use of datatypes.
19
Mark Dickinson17e4fdd2009-03-23 18:44:57 +000020- Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
21 improve its performance. Long divisions and remainder operations
22 are now between 50% and 150% faster.
23
Mark Dickinsonbd792642009-03-18 20:06:12 +000024- Issue #4258: Make it possible to use base 2**30 instead of base
25 2**15 for the internal representation of integers, for performance
26 reasons. Base 2**30 is enabled by default on 64-bit machines. Add
27 --enable-big-digits option to configure, which overrides the
28 default. Add sys.int_info structseq to provide information about
29 the internal format.
30
Mark Dickinson081dfee2009-03-18 14:47:41 +000031- Issue #4474: PyUnicode_FromWideChar now converts characters outside
32 the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
33 and sizeof(Py_UNICODE) == 2.
34
Eric Smith8ec90442009-03-14 12:29:34 +000035- Issue #5237: Allow auto-numbered fields in str.format(). For
36 example: '{} {}'.format(1, 2) == '1 2'.
37
Antoine Pitrou652e7072009-03-13 19:25:20 +000038- Issue #5392: when a very low recursion limit was set, the interpreter would
39 abort with a fatal error after the recursion limit was hit twice.
40
Benjamin Petersond1735892009-03-07 18:46:21 +000041Library
42-------
43
Benjamin Peterson59406a92009-03-26 17:10:29 +000044- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
45 io.BufferedRandom have been deprecated for removal in Python 3.2.
46
Lars Gustäbel42e00912009-03-22 20:34:29 +000047- Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
48 forever on incomplete input. That caused tarfile.open() to hang when used
49 with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
50 partial bzip2 compressed data.
51
Mark Dickinson79f52032009-03-17 23:12:51 +000052- Issue #2110: Add support for thousands separator and 'n' type
53 specifier to Decimal.__format__
54
Mark Dickinson9c59fe02009-03-17 18:15:08 +000055- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
56 '>' alignment characters.
57
Antoine Pitrou0ae29cf2009-03-13 22:33:17 +000058- The error detection code in FileIO.close() could fail to reflect the `errno`
59 value, and report it as -1 instead.
60
Antoine Pitroua28fcfd2009-03-13 23:42:55 +000061- Issue #5016: FileIO.seekable() could return False if the file position
62 was negative when truncated to a C int. Patch by Victor Stinner.
63
Mark Dickinsonae681df2009-03-21 10:26:31 +000064Extension Modules
65-----------------
66
67- Issue #5463: In struct module, remove deprecated overflow wrapping
68 when packing an integer: struct.pack('=L', -1) now raises
69 struct.error instead of returning b'\xff\xff\xff\xff'.
70
Benjamin Petersond1735892009-03-07 18:46:21 +000071
Benjamin Petersona58a6262009-03-07 16:34:40 +000072What's New in Python 3.1 alpha 1
Barry Warsaw97f005d2008-12-03 16:46:14 +000073================================
Barry Warsawd8ccd1c2008-11-21 15:13:37 +000074
Benjamin Petersona58a6262009-03-07 16:34:40 +000075*Release date: 2009-03-07*
Barry Warsawd8ccd1c2008-11-21 15:13:37 +000076
77Core and Builtins
78-----------------
79
Benjamin Peterson4fa88fa2009-03-04 00:14:51 +000080- The io module has been reimplemented in C for speed.
81
Raymond Hettingerb0d56af2009-03-03 10:52:49 +000082- Give dict views an informative __repr__.
83
Eric Smith5e5c0db2009-02-20 14:25:03 +000084- Issue #5247: Improve error message when unknown format codes are
85 used when using str.format() with str, int, and float arguments.
86
Hirokazu Yamamoto575d1332009-02-16 09:13:20 +000087- Issue #5249: time.strftime returned malformed string when format string
88 contained non ascii character on windows.
89
Benjamin Petersonf5b52242009-03-02 23:31:26 +000090- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
91 source has already been decoded into str.
92
Antoine Pitrou79eee6b2009-02-13 14:01:05 +000093- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
94 rotating the object pointer by 4 bits to the right.
95
Mark Dickinson87ec0852009-02-09 17:15:59 +000096- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
97 it now forces its argument to double before testing for infinity.
98
Benjamin Petersonee1ae7c2009-02-08 21:07:20 +000099- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
100 returns a non-number type.
101
Benjamin Peterson87618552009-02-08 15:00:52 +0000102- Issue #5182: Removed memoryview.__str__.
103
Mark Dickinsonc008a172009-02-01 13:59:22 +0000104- Issue #1717: Removed builtin cmp() function, dropped tp_compare
105 slot, the C API functions PyObject_Compare and PyUnicode_Compare and
Mark Dickinsone94c6792009-02-02 20:36:42 +0000106 the type definition cmpfunc. The tp_compare slot has been renamed
107 to tp_reserved, and is reserved for future usage.
Mark Dickinsonf02e0aa2009-02-01 12:13:56 +0000108
Raymond Hettingere8364232009-02-02 22:55:09 +0000109- Issue 1242657: the __len__() and __length_hint__() calls in several tools
110 were suppressing all exceptions. These include list() and bytearray().
111
Mark Dickinson1124e712009-01-28 21:25:58 +0000112- Issue #4707: round(x, n) now returns an integer if x is an integer.
113 Previously it returned a float.
114
Antoine Pitroub52ec782009-01-25 16:34:23 +0000115- Issue #4753: By enabling a configure option named '--with-computed-gotos'
116 on compilers that support it (notably: gcc, SunPro, icc), the bytecode
117 evaluation loop is compiled with a new dispatch mechanism which gives
118 speedups of up to 20%, depending on the system, on various benchmarks.
119
Antoine Pitrou81fabdb2009-01-22 10:11:36 +0000120- Issue #4874: Most builtin decoders now reject unicode input.
121
Mark Dickinson9ffc0202009-01-20 20:45:53 +0000122- Issue #4842: Don't allow trailing 'L' when constructing an integer
123 from a string.
124
Benjamin Peterson05e782f2009-01-19 15:15:02 +0000125- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.
126
Antoine Pitroue4bc7f62009-01-17 21:06:43 +0000127- Issue #4838: When a module is deallocated, free the memory backing the
128 optional module state data.
129
Mark Dickinson8055afd2009-01-17 10:04:45 +0000130- Issue #4910: Rename nb_long slot to nb_reserved, and change its
131 type to (void *).
132
Antoine Pitrou8d4e5052009-01-13 22:59:11 +0000133- Issue #4935: The overflow checking code in the expandtabs() method common
134 to str, bytes and bytearray could be optimized away by the compiler, letting
135 the interpreter segfault instead of raising an error.
136
Amaury Forgeot d'Arcf343e012009-01-12 23:58:21 +0000137- Issue #3720: Fix a crash when an iterator modifies its class and removes its
138 __next__ method.
139
Mark Dickinsone5e298f2009-01-12 20:49:19 +0000140- Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
141 function no longer attempt to call the __long__ slot to convert an object
142 to an integer. Only the __int__ and __trunc__ slots are examined.
143
Martin v. Löwis7c2b66c2009-01-12 08:21:03 +0000144- Issue #4893: Use NT threading on CE.
145
Martin v. Löwisec59d042009-01-12 07:59:10 +0000146- Issue #4915: Port sysmodule to Windows CE.
147
Antoine Pitrouab868312009-01-10 15:40:25 +0000148- Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
149 common cases are optimized thanks to a dedicated fast path and a moderate
150 amount of loop unrolling.
151
Antoine Pitrou14b78f52009-01-09 22:27:08 +0000152- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
153 collecting the oldest generation) so that allocating lots of objects without
154 destroying them does not show quadratic performance. Based on a proposal by
155 Martin von Löwis at
156 http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
157
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000158- Issue #4604: Some objects of the I/O library could still be used after
Antoine Pitrou8043cf82009-01-09 19:54:29 +0000159 having been closed (for instance, a read() call could return some
160 previously buffered data). Patch by Dmitry Vasiliev.
161
Antoine Pitrou05608432009-01-09 18:53:14 +0000162- Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
163 flag to work properly. Furthermore, when specifying -u, the text stdout
164 and stderr streams have line-by-line buffering enabled (the default being
165 to buffer arbitrary chunks of data).
166
Raymond Hettinger35631532009-01-09 03:58:09 +0000167- The internal table, _PyLong_DigitValue, is now an array of unsigned chars
168 instead of ints (reducing its size from 4 to 8 times thereby reducing
169 Python's overall memory).
170
Antoine Pitroud35cbf62009-01-06 19:02:24 +0000171- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
172 an existing .py counterpart, override the co_filename attributes of all
173 code objects if the original filename is obsolete (which can happen if the
174 file has been renamed, moved, or if it is accessed through different paths).
175 Patch by Ziga Seilnacht and Jean-Paul Calderone.
176
Antoine Pitrouc3b39242009-01-03 16:59:18 +0000177- Issue #4580: Fix slicing of memoryviews when the item size is greater than
178 one byte. Also fixes the meaning of len() so that it returns the number of
179 items, rather than the size in bytes.
180
Martin v. Löwis5c88d812009-01-02 20:47:48 +0000181- Issue #4075: Use OutputDebugStringW in Py_FatalError.
182
Amaury Forgeot d'Arc374e2202009-01-01 23:05:36 +0000183- Issue #4747: When the terminal does not use utf-8, executing a script with
184 non-ascii characters in its name could fail with a "SyntaxError: None" error.
185
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000186- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
Hirokazu Yamamoto8ed9a802009-01-01 16:09:52 +0000187 file with `bytes' filename on Windows.
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000188
Antoine Pitrou7ddda782009-01-01 15:35:33 +0000189- Issue #3680: Reference cycles created through a dict, set or deque iterator
190 did not get collected.
191
Nick Coghlanf1f2f682008-12-30 07:29:12 +0000192- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
193 where the tp_hash and tp_dict slots are both NULL.
194
Georg Brandlccc47b62008-12-28 11:44:14 +0000195- Issue #4759: None is now allowed as the first argument of
196 bytearray.translate(). It was always allowed for bytes.translate().
197
Skip Montanaro80072cb2008-12-23 03:51:14 +0000198- Added test case to ensure attempts to read from a file opened for writing
199 fail.
200
Antoine Pitrou51f3ef92008-12-20 13:14:23 +0000201- Issue #3106: Speedup some comparisons (str/str and int/int).
202
Antoine Pitrouf289ae62008-12-18 11:06:25 +0000203- Issue #2183: Simplify and optimize bytecode for list, dict and set
204 comprehensions. Original patch for list comprehensions by Neal Norwitz.
205
Antoine Pitrou621601a2008-12-17 23:18:19 +0000206- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
207 print elapsed times, not only when some objects are uncollectable /
208 unreachable. Original patch by Neil Schemenauer.
209
Mark Dickinson54bc1ec2008-12-17 16:19:07 +0000210- Issue #3439: Add a bit_length method to int.
211
Mark Dickinsonda2706b2008-12-11 18:03:03 +0000212- Issue #2173: When getting device encoding, check that return value of
213 nl_langinfo is not the empty string. This was causing silent build
214 failures on OS X.
215
Jeffrey Yasskinb9083f32008-12-11 06:18:33 +0000216- Issue #4597: Fixed several opcodes that weren't always propagating
217 exceptions.
218
219- Issue #4589: Fixed exception handling when the __exit__ function of a
Amaury Forgeot d'Arc10b24e82008-12-10 23:49:33 +0000220 context manager returns a value that cannot be converted to a bool.
221
Mark Dickinsonfd24b322008-12-06 15:33:31 +0000222- Issue #4445: Replace "sizeof(PyBytesObject)" with
223 "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
224 bytes instances. On a typical machine this saves 3 bytes of memory
225 (on average) per allocation of a bytes instance.
226
Christian Heimesa872de52008-12-05 08:26:55 +0000227- Issue #4533: File read operation was dreadfully slow due to a slowly
228 growing read buffer. Fixed by using the same growth rate algorithm as
229 Python 2.x.
230
Antoine Pitrou5504e892008-12-06 21:27:53 +0000231- Issue #4509: Various issues surrounding resize of bytearray objects to
232 which there are buffer exports (e.g. memoryview instances).
233
Georg Brandlf9734072008-12-07 15:30:06 +0000234- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
235 method on file objects with closefd=False. The file descriptor is still
236 kept open but the file object behaves like a closed file. The ``FileIO``
237 object also got a new readonly attribute ``closefd``.
Matthias Klose7e1b8fa2008-11-26 17:22:04 +0000238
Antoine Pitroubc420402008-12-07 20:14:49 +0000239- Issue #4569: Interpreter crash when mutating a memoryview with an item size
240 larger than 1.
241
Benjamin Peterson371ccfb2008-12-27 19:03:36 +0000242- Issue #4748: Lambda generators no longer return a value.
243
Gregory P. Smithccc5ae72009-03-02 05:21:55 +0000244- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
245
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000246Library
247-------
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000248
Antoine Pitrou350370c2009-03-14 00:13:13 +0000249- Issue #1222: locale.format() bug when the thousands separator is a space
250 character.
251
Tarek Ziadé516db942009-03-11 12:52:00 +0000252- Issue #5472: Fixed distutils.test_util tear down. Original patch by
253 Tim Golden.
254
Raymond Hettinger5bb0f0e2009-03-10 12:56:32 +0000255- collections.deque() objects now have a read-only attribute called maxlen.
256
Guilherme Polof45b4cc2009-03-07 02:19:14 +0000257- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
258 it is has been populated and properly configured in order to prevent
259 window flashing.
260
Guilherme Polo56f5be52009-03-07 01:54:57 +0000261- Issue #4792: Prevent a segfault in _tkinter by using the
262 guaranteed to be safe interp argument given to the PythonCmd in place of
263 the Tcl interpreter taken from a PythonCmd_ClientData.
264
265- Issue #5193: Guarantee that tkinter.Text.search returns a string.
266
Tarek Ziadé63b64c02009-03-07 00:51:53 +0000267- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
268 Original patch by Akira Kitada.
269
Hirokazu Yamamoto54d0df62009-03-06 03:04:07 +0000270- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.
271
Hirokazu Yamamoto8e722bc2009-03-05 14:33:01 +0000272- Issue #5385: Fixed mmap crash after resize failure on windows.
273
Hirokazu Yamamoto0c988172009-03-03 22:41:26 +0000274- Issue #5179: Fixed subprocess handle leak on failure on windows.
275
Raymond Hettinger2d32f632009-03-02 21:24:57 +0000276- PEP 372: Added collections.OrderedDict().
277
Raymond Hettingera4f52b12009-03-02 22:28:31 +0000278- The _asdict() for method for namedtuples now returns an OrderedDict().
279
Raymond Hettinger0663a1e2009-03-02 23:06:00 +0000280- configparser now defaults to using an ordered dictionary.
281
Benjamin Petersone0124bd2009-03-09 21:04:33 +0000282- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
283 import guess_extension`` was used.
284
Hirokazu Yamamoto10c99372009-02-28 12:21:53 +0000285- Issue #1733986: Fixed mmap crash in accessing elements of second map object
286 with same tagname but larger size than first map. (Windows)
287
Hirokazu Yamamoto39c6dea2009-02-28 10:56:50 +0000288- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
289 overrun.
290
Tarek Ziadéf0721222009-02-28 10:16:43 +0000291- Issue #1533164: Installed but not listed *.pyo was breaking Distutils
292 bdist_rpm command.
293
294- Issue #5378: added --quiet option to Distutils bdist_rpm command.
295
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000296- Issue #5052: make Distutils compatible with 2.3 again.
297
Tarek Ziadé0f31e6d2009-02-25 22:31:38 +0000298- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
299 in Distutils tests.
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000300
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000301- Issue #5287: Add exception handling around findCaller() call to help out
302 IronPython.
303
Hirokazu Yamamoto0654ccd2009-02-18 16:38:00 +0000304- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
305 The file was resized to wrong size.
306
307- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
308
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000309- Issue #2279: distutils.sdist.add_defaults now add files
Tarek Ziadé0d0506e2009-02-16 21:49:12 +0000310 from the package_data and the data_files metadata.
311
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000312- Issue #5257: refactored all tests in distutils, so they use
Tarek Ziadéc1375d52009-02-14 14:35:51 +0000313 support.TempdirManager, to avoid writing in the tests directory.
314
Tarek Ziadé68c50952009-02-13 23:04:17 +0000315- Issue #4524: distutils build_script command failed with --with-suffix=3.
316 Initial patch by Amaury Forgeot d'Arc.
317
Tarek Ziadé811d6242009-02-13 22:26:15 +0000318- Issue #2461: added tests for distutils.util
319
Mark Dickinsonc28ad272009-02-12 17:58:36 +0000320- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
321 which inherited from numbers.py which did not have __slots__ defined. The
322 numbers hierarchy now has its own __slots__ declarations.
323
Antoine Pitroub353c122009-02-11 00:39:14 +0000324- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
325 encoding.
326
Thomas Heller465c8022009-02-10 18:59:04 +0000327- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
328 function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
329
Tarek Ziadé7d5e9872009-02-10 12:36:33 +0000330- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
331 under NT and OS2. Patch by Philip Jenvey.
332
Brett Cannonbefb14f2009-02-10 02:10:16 +0000333- Issue #5128: Make compileall properly inspect bytecode to determine if needs
334 to be recreated. This avoids a timing hole thanks to the old reliance on the
335 ctime of the files involved.
336
Guilherme Polob681df42009-02-09 22:33:59 +0000337- Issue #5122: Synchronize tk load failure check to prevent a potential
338 deadlock.
339
Benjamin Petersona86f2c02009-02-10 02:41:10 +0000340- Issue #1818: collections.namedtuple() now supports a keyword argument
341 'rename' which lets invalid fieldnames be automatically converted to
342 positional names in the form, _1, _2, ...
343
Guilherme Poloae098992009-02-09 16:44:24 +0000344- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
345
Nick Coghlan9a1d6e32009-02-08 03:37:27 +0000346- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
347 public documented method ``ZipImporter.get_filename()``.
348
Nick Coghlan3f48ae32009-02-08 01:58:26 +0000349- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
350 the execution of packages by looking for and executing a ``__main__``
351 submodule when a package name is supplied. Initial patch by Andi
352 Vajda.
353
Guilherme Polo491aee22009-02-06 23:16:11 +0000354- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
355 not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
356 Tkapp_Call when calling from a thread different than the one that created
357 the Tcl interpreter. Patch by Robert Hancock.
358
Eric Smith0e5b5622009-02-06 01:32:42 +0000359- Issue #4285: Change sys.version_info to be a named tuple. Patch by
360 Ross Light.
361
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000362- Issue #1520877: Now distutils.sysconfig reads $AR from the
Tarek Ziadéd3409de2009-02-06 01:18:36 +0000363 environment/Makefile. Patch by Douglas Greiman.
364
Tarek Ziadé70a74eb2009-02-06 00:38:35 +0000365- Issue #1276768: The verbose option was not used in the code of
366 distutils.file_util and distutils.dir_util.
367
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000368- Issue #5132: Fixed trouble building extensions under Solaris with
Tarek Ziadé5874ef12009-02-05 22:56:14 +0000369 --enabled-shared activated. Initial patch by Dave Peterson.
370
Guilherme Polo7f423952009-02-02 21:17:09 +0000371- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
372
Raymond Hettinger85602262009-02-03 04:19:10 +0000373- The shelve module now defaults to pickle protocol 3.
374
Brett Cannone61426e2009-01-30 01:31:34 +0000375- Fix a bug in the trace module where a bytes object from co_lnotab had its
376 items being passed through ord().
377
Antoine Pitrou0dcc3cd2009-01-29 20:26:59 +0000378- Issue #2047: shutil.move() could believe that its destination path was
379 inside its source path if it began with the same letters (e.g. "src" vs.
380 "src.new").
381
Guilherme Polo5f238482009-01-28 14:41:10 +0000382- Added the ttk module. See issue #2983: Ttk support for Tkinter.
383
Raymond Hettinger89e12962009-01-26 02:09:03 +0000384- Removed isSequenceType(), isMappingType, and isNumberType() from the
385 operator module; use the abstract base classes instead. Also removed
386 the repeat() function; use mul() instead.
387
Raymond Hettinger0f055172009-01-27 10:06:09 +0000388- Issue 5021: doctest.testfile() did not create __name__ and
389 collections.namedtuple() relied on __name__ being defined.
390
391- Backport importlib from Python 3.1. Only the import_module() function has
392 been backported to help facilitate transitions from 2.7 to 3.1.
393
Tarek Ziadé0302cf52009-01-26 17:23:20 +0000394- Issue #1885: distutils. When running sdist with --formats=tar,gztar
395 the tar file was overriden by the gztar one.
396
Tarek Ziadé4d4456f2009-01-25 18:27:45 +0000397- Issue #4863: distutils.mwerkscompiler has been removed.
398
Raymond Hettingerd07d9392009-01-27 04:20:44 +0000399- Added a new itertools functions: combinations_with_replacement()
400 and compress().
Raymond Hettinger6b3b0fc2009-01-26 02:56:58 +0000401
Raymond Hettinger30729212009-02-12 06:28:27 +0000402- Issue 5032: added a step argument to itertools.count() and
403 allowed non-integer arguments.
404
Jesse Noller41faa542009-01-25 03:45:53 +0000405- Fix and properly document the multiprocessing module's logging
406 support, expose the internal levels and provide proper usage
407 examples.
408
Mark Dickinsoncddcf442009-01-24 21:46:33 +0000409- Issue #1672332: fix unpickling of subnormal floats, which was
410 producing a ValueError on some platforms.
411
Martin v. Löwisacbf4612009-01-24 16:19:45 +0000412- Issue #3881: Help Tcl to load even when started through the
413 unreadable local symlink to "Program Files" on Vista.
414
Martin v. Löwis59e47792009-01-24 14:10:07 +0000415- Issue #4710: Extract directories properly in the zipfile module;
416 allow adding directories to a zipfile.
417
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000418- Issue #3807: _multiprocessing build fails when configure is passed
Jesse Noller6fd47e22009-01-23 14:09:08 +0000419 --without-threads argument. When this occurs, _multiprocessing will
420 be disabled, and not compiled.
421
Antoine Pitrou08838b62009-01-21 00:55:13 +0000422- Issue #5008: When a file is opened in append mode with the new IO library,
423 do an explicit seek to the end of file (so that e.g. tell() returns the
424 file size rather than 0). This is consistent with the behaviour of the
425 traditional 2.x file object.
426
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000427- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
428 parameter was set.
429
Mark Dickinson8dd05142009-01-20 20:43:58 +0000430- Issue #4842: Always append a trailing 'L' when pickling longs using
431 pickle protocol 0. When reading, the 'L' is optional.
432
Brett Cannonafccd632009-01-20 02:21:27 +0000433- Add the importlib package.
434
Jesse Noller9a0fc972009-01-18 21:12:58 +0000435- Issue #4301: Patch the logging module to add processName support, remove
436 _check_logger_class from multiprocessing.
437
Jesse Noller1cbb17a2009-01-18 19:45:18 +0000438- Issue #3325: Remove python2.x try: except: imports for old cPickle from
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000439 multiprocessing.
Jesse Nollerf70a5382009-01-18 19:44:02 +0000440
Benjamin Peterson9953a8d2009-01-17 04:15:01 +0000441- Issue #4959: inspect.formatargspec now works for keyword only arguments
442 without defaults.
443
Jesse Noller6214edd2009-01-19 16:23:53 +0000444- Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
445 for *nix machines for negative handles and large int handles. Without this check
446 it is possible to segfault the interpreter.
447
Jesse Nollerb0516a62009-01-18 03:11:38 +0000448- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
449 in sharedctypes.py.
450
451- Issue #1225107: inspect.isclass() returned True for instances with a custom
452 __getattr__.
453
Gregory P. Smithde3369f2009-01-12 04:50:11 +0000454- Issue #3826 and #4791: The socket module now closes the underlying socket
455 appropriately when it is being used via socket.makefile() objects
456 rather than delaying the close by waiting for garbage collection to do it.
457
Raymond Hettingerb8baf632009-01-14 02:20:07 +0000458- Issue #1696199: Add collections.Counter() for rapid and convenient
459 counting.
460
Antoine Pitrou308705e2009-01-10 16:22:51 +0000461- Issue #3860: GzipFile and BZ2File now support the context manager protocol.
462
Thomas Heller5e4e4272009-01-08 09:34:20 +0000463- Issue #4867: Fixed a crash in ctypes when passing a string to a
464 function without defining argtypes.
465
Antoine Pitrou42db3ef2009-01-04 21:37:59 +0000466- Issue #4272: Add an optional argument to the GzipFile constructor to override
467 the timestamp in the gzip stream. The default value remains the current time.
468 The information can be used by e.g. gunzip when decompressing. Patch by
469 Jacques Frechet.
470
Mark Dickinson315a20a2009-01-04 21:34:18 +0000471- Restore Python 2.3 compatibility for decimal.py.
472
Guilherme Polo3f5f8222009-01-03 22:00:39 +0000473- Issue #3638: Remove functions from _tkinter module level that depend on
474 TkappObject to work with multiple threads.
475
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000476- Issue #4718: Adapt the wsgiref package so that it actually works with
477 Python 3.x, in accordance with the `official amendments of the spec
Antoine Pitrou38a66ad2009-01-03 18:41:49 +0000478 <http://www.wsgi.org/wsgi/Amendments_1.0>`_.
479
Raymond Hettinger771ed762009-01-03 19:20:32 +0000480- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
481 to the decimal module.
482
Georg Brandl3a9b0622009-01-03 22:07:57 +0000483- Fractions.from_float() no longer loses precision for integers too big to
484 cast as floats.
485
Mark Dickinsonf9236412009-01-02 23:23:21 +0000486- Issue #4812: add missing underscore prefix to some internal-use-only
487 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
488
Georg Brandl3a9b0622009-01-03 22:07:57 +0000489- Issue 4790: The nsmallest() and nlargest() functions in the heapq module
490 did unnecessary work in the common case where no key function was specified.
491
Georg Brandlb1441c72009-01-03 22:33:39 +0000492- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
493 the function is not a generator.
494
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000495- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
496 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
Tarek Ziadé9df8ce32008-12-30 23:09:20 +0000497
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000498- Issue #4646: distutils was choking on empty options arg in the setup
Tarek Ziadé4450dcf2008-12-29 22:38:38 +0000499 function. Original patch by Thomas Heller.
500
Martin v. Löwis1f1620e2008-12-29 16:27:13 +0000501- Issue #3767: Convert Tk object to string in tkColorChooser.
502
Martin v. Löwise354d782008-12-29 16:03:04 +0000503- Issue #3248: Allow placing ScrolledText in a PanedWindow.
504
Antoine Pitrou5acd41e2008-12-28 14:29:00 +0000505- Issue #4444: Allow assertRaises() to be used as a context handler, so that
506 the code under test can be written inline if more practical.
507
Georg Brandldb7b6b92009-01-01 15:53:14 +0000508- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
509 works as expected in the interactive environment.
510
Antoine Pitroudb5fe662008-12-27 15:50:40 +0000511- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
512 Gabriel Genellina.
513
Antoine Pitrou180a3362008-12-14 16:36:46 +0000514- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
515 boundary.
516
Nick Coghlanf088e5e2008-12-14 11:50:48 +0000517- Issue #4223: inspect.getsource() will now correctly display source code
518 for packages loaded via zipimport (or any other conformant PEP 302
519 loader). Original patch by Alexander Belopolsky.
520
521- Issue #4201: pdb can now access and display source code loaded via
522 zipimport (or any other conformant PEP 302 loader). Original patch by
523 Alexander Belopolsky.
524
525- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
526 302 conformant loader) will now work correctly in most cases (they
527 are still subject to the constraints that exist for all code running
528 from inside a module loaded via a PEP 302 loader and attempting to
529 perform IO operations based on __file__). Original patch by
530 Alexander Belopolsky.
531
532- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
533 allows backporting to maintenance branches. Original patch by
534 Alexander Belopolsky.
535
Antoine Pitrou7c59bc62008-12-13 23:20:54 +0000536- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
537 a non-ASCII letter.
538
Lars Gustäbel43fcf3a2008-12-12 14:58:38 +0000539- Issue #4616: TarFile.utime(): Restore directory times on Windows.
540
Benjamin Peterson433f32c2008-12-12 01:25:05 +0000541- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
542 codec cannot be found. This is for compatibility with the builtin behavior.
543
Facundo Batista708d5812008-12-11 04:20:07 +0000544- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
545 give correct results in the case where one argument is a quiet NaN
546 and the other is a finite number that requires rounding.
547
Skip Montanaroc1ce2862008-12-06 17:25:02 +0000548- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
549 libs.
550
Georg Brandlf9734072008-12-07 15:30:06 +0000551- Added the subprocess.check_call_output() convenience function to get output
552 from a subprocess on success or raise an exception on error.
553
554- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
555 support unusual filenames (such as those containing semi-colons) in
556 Content-Disposition headers.
557
558- Issue #4384: Added logging integration with warnings module using
559 captureWarnings(). This change includes a NullHandler which does nothing;
560 it will be of use to library developers who want to avoid the "No handlers
561 could be found for logger XXX" message which can appear if the library user
562 doesn't configure logging.
563
564- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
565 exception.
566
Georg Brandleee31162008-12-07 15:15:22 +0000567- Issue #4529: fix the parser module's validation of try-except-finally
568 statements.
569
570- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
571 not a malformed option.
572
573- Added the subprocess.check_output() convenience function to get output
574 from a subprocess on success or raise an exception on error.
575
Amaury Forgeot d'Arcbc9d4742008-12-05 01:40:43 +0000576- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
577 the corresponding tests now pass.
578
Amaury Forgeot d'Arcbc2ce572008-12-05 01:02:21 +0000579- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
580 it was calling the wrong open() function.
581
Fred Drake9a0a65b2008-12-04 19:24:50 +0000582- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
583 support unusual filenames (such as those containing semi-colons) in
584 Content-Disposition headers.
585
Matthias Klose2c7e3ee2009-01-10 17:08:25 +0000586- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
587 biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
588
Benjamin Peterson5c6d7872009-02-06 02:40:07 +0000589- Issue #5104: The socket module now raises OverflowError when 16-bit port and
590 protocol numbers are supplied outside the allowed 0-65536 range on bind()
591 and getservbyport().
592
Antoine Pitrou2a013ea2008-12-27 20:39:28 +0000593Tools/Demos
594-----------
595
Antoine Pitrou8a681222009-02-07 17:13:31 +0000596- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
597 and make it 2.6-compatible.
598
Guilherme Poloa7d27972009-01-28 16:06:51 +0000599- Ttk demos added in Demo/tkinter/ttk/
600
Antoine Pitrou2a013ea2008-12-27 20:39:28 +0000601- Issue #4677: add two list comprehension tests to pybench.
602
Georg Brandlb1441c72009-01-03 22:33:39 +0000603
604Build
605-----
606
Matthias Klose906785c2009-02-22 23:18:38 +0000607- Link the shared python library with $(MODLIBS).
608
Martin v. Löwis11f72102009-02-10 13:13:30 +0000609- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
610
Martin v. Löwisbc186a82009-02-02 15:32:22 +0000611- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
612
Martin v. Löwise97637d2009-01-11 09:45:11 +0000613- Issue #4895: Use _strdup on Windows CE.
614
Georg Brandlb1441c72009-01-03 22:33:39 +0000615- Issue #4472: "configure --enable-shared" now works on OSX
616
617- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
618
619- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
620
621- Issue #4289: Remove Cancel button from AdvancedDlg.
622
623- Issue #1656675: Register a drop handler for .py* files on Windows.
624
625- Issue #4120: Exclude manifest from extension modules in VS2008.
626
627- Issue #4091: Install pythonxy.dll in system32 again.
628
629- Issue #4018: Disable "for me" installations on Vista.
630
631- Issue #3758: Add ``patchcheck`` build target to .PHONY.
632
633- Issue #4204: Fixed module build errors on FreeBSD 4.
634
635
636C-API
637-----
638
Mark Dickinson21776072009-02-10 16:13:25 +0000639- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
640 for negative arguments. Previously, it raised TypeError.
641
Georg Brandlb1441c72009-01-03 22:33:39 +0000642- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
643
644- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
645 the GIL is released, or owned by another thread.
646
647- Issue #4122: On Windows, fix a compilation error when using the
648 Py_UNICODE_ISSPACE macro in an extension module.
649
650
Mark Dickinsone675f082008-12-11 21:56:00 +0000651Extension Modules
652-----------------
653
Gregory P. Smith365a1862009-02-12 07:35:29 +0000654- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
655 supporting objects as input no matter how it was compiled (built in
656 implementations or external openssl library).
657
Mark Dickinson29500f62009-01-15 15:36:10 +0000658- Issue #4397: Fix occasional test_socket failure on OS X.
659
Martin v. Löwisa9b54c72009-01-11 09:30:50 +0000660- Issue #4279: Fix build of parsermodule under Cygwin.
661
Antoine Pitroubcd5cbe2009-01-08 21:17:16 +0000662- Issue #4751: hashlib now releases the GIL when hashing large buffers
663 (with a hardwired threshold of 2048 bytes), allowing better parallelization
664 on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.
665
Martin v. Löwis5c88d812009-01-02 20:47:48 +0000666- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
667
Antoine Pitrou31f30b12009-01-02 17:34:35 +0000668- Issue #4738: Each zlib object now has a separate lock, allowing to compress
669 or decompress several streams at once on multi-CPU systems. Also, the GIL
670 is now released when computing the CRC of a large buffer. Patch by ebfe.
671
Georg Brandlb1441c72009-01-03 22:33:39 +0000672- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
673
Martin v. Löwis05bfe1f2008-12-29 18:21:47 +0000674- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
675
Mark Dickinsone675f082008-12-11 21:56:00 +0000676- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
677 OpenBSD.
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +0000678
Antoine Pitrou3ad3a0d2008-12-18 17:08:32 +0000679- Issue #4583: array.array would not always prohibit resizing when a buffer
680 has been exported, resulting in an interpreter crash when accessing the
681 buffer.
682
Martin v. Löwis841edad2008-11-30 10:36:49 +0000683
Guilherme Polo9de29af2009-01-28 20:40:48 +0000684Tests
685-----
686
687- Issue #5083: New 'gui' resource for regrtest.
688
689
Brett Cannon7317c1e2008-11-25 19:19:17 +0000690Docs
691----
692
Georg Brandl52b92cc2008-05-25 09:43:03 +0000693
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000694**(For information about older versions, consult the HISTORY file.)**