blob: 524a79c8c7b0d15d848569effed9186535a1134f [file] [log] [blame]
Georg Brandlab6f2f62009-03-31 04:16:10 +00001+++++++++++
2Python News
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00003+++++++++++
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
Georg Brandlab6f2f62009-03-31 04:16:10 +000015- Fix a segfault when running test_exceptions with coverage, caused by
16 insufficient checks in accessors of Exception.__context__.
17
Guido van Rossum0ad59d42009-03-30 22:01:35 +000018- Issue #5604: non-ASCII characters in module name passed to
19 imp.find_module() were converted to UTF-8 while the path is
20 converted to the default filesystem encoding, causing nonsense.
21
Benjamin Peterson09832742009-03-26 17:15:46 +000022- Issue #5126: str.isprintable() returned False for space characters.
23
Ronald Oussorenfa1fcd12009-03-30 23:16:10 +000024- Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
25 the end sys.path, for compatibility with the system install of Python.
26
Antoine Pitrou3a652b12009-03-23 18:52:06 +000027- Issue #4688: Add a heuristic so that tuples and dicts containing only
28 untrackable objects are not tracked by the garbage collector. This can
29 reduce the size of collections and therefore the garbage collection overhead
30 on long-running programs, depending on their particular use of datatypes.
31
Mark Dickinson17e4fdd2009-03-23 18:44:57 +000032- Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
33 improve its performance. Long divisions and remainder operations
34 are now between 50% and 150% faster.
35
Mark Dickinsonbd792642009-03-18 20:06:12 +000036- Issue #4258: Make it possible to use base 2**30 instead of base
37 2**15 for the internal representation of integers, for performance
38 reasons. Base 2**30 is enabled by default on 64-bit machines. Add
39 --enable-big-digits option to configure, which overrides the
40 default. Add sys.int_info structseq to provide information about
41 the internal format.
42
Mark Dickinson081dfee2009-03-18 14:47:41 +000043- Issue #4474: PyUnicode_FromWideChar now converts characters outside
44 the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
45 and sizeof(Py_UNICODE) == 2.
46
Eric Smith8ec90442009-03-14 12:29:34 +000047- Issue #5237: Allow auto-numbered fields in str.format(). For
48 example: '{} {}'.format(1, 2) == '1 2'.
49
Antoine Pitrou652e7072009-03-13 19:25:20 +000050- Issue #5392: when a very low recursion limit was set, the interpreter would
51 abort with a fatal error after the recursion limit was hit twice.
52
Benjamin Petersond1735892009-03-07 18:46:21 +000053Library
54-------
55
Georg Brandl4ed72ac2009-04-01 04:28:33 +000056- Issue #5624: Fix the _winreg module name still used in several modules.
57
Benjamin Petersona1b49012009-03-31 23:11:32 +000058- Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.
59
Jesse Nollera9314042009-03-31 22:36:44 +000060- Issue #5619: Multiprocessing children disobey the debug flag and causes
61 popups on windows buildbots. Patch applied to work around this issue.
62
Jesse Noller32d68c22009-03-31 18:48:42 +000063- Issue #5400: Added patch for multiprocessing on netbsd compilation/support
64
Hirokazu Yamamoto16caab02009-03-31 13:44:06 +000065- Issue #5387: Fixed mmap.move crash by integer overflow.
66
Jesse Nollerf8d00852009-03-31 03:25:07 +000067- Issue #5261: Patch multiprocessing's semaphore.c to support context
68 manager use: "with multiprocessing.Lock()" works now.
69
Brett Cannon7f6b4f82009-03-30 21:30:26 +000070- Issue #5236: Change time.strptime() to only take strings. Didn't work with
71 bytes already but the failure was non-obvious.
72
Jesse Noller7af4ef82009-03-30 16:47:15 +000073- Issue #5177: Multiprocessing's SocketListener class now uses
74 socket.SO_REUSEADDR on all connections so that the user no longer needs
75 to wait 120 seconds for the socket to expire.
76
Benjamin Peterson48e24782009-03-29 13:02:52 +000077- Issue #5595: Fix UnboundedLocalError in ntpath.ismount().
78
Antoine Pitrou66994e12009-03-29 00:45:26 +000079- Issue #1174606: Calling read() without arguments of an unbounded file
80 (typically /dev/zero under Unix) could crash the interpreter.
81
Benjamin Peterson59406a92009-03-26 17:10:29 +000082- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
83 io.BufferedRandom have been deprecated for removal in Python 3.2.
84
Lars Gustäbel42e00912009-03-22 20:34:29 +000085- Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
86 forever on incomplete input. That caused tarfile.open() to hang when used
87 with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
88 partial bzip2 compressed data.
89
Mark Dickinson79f52032009-03-17 23:12:51 +000090- Issue #2110: Add support for thousands separator and 'n' type
91 specifier to Decimal.__format__
92
Mark Dickinson9c59fe02009-03-17 18:15:08 +000093- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
94 '>' alignment characters.
95
Antoine Pitrou0ae29cf2009-03-13 22:33:17 +000096- The error detection code in FileIO.close() could fail to reflect the `errno`
97 value, and report it as -1 instead.
98
Antoine Pitroua28fcfd2009-03-13 23:42:55 +000099- Issue #5016: FileIO.seekable() could return False if the file position
100 was negative when truncated to a C int. Patch by Victor Stinner.
101
Mark Dickinsonae681df2009-03-21 10:26:31 +0000102Extension Modules
103-----------------
104
105- Issue #5463: In struct module, remove deprecated overflow wrapping
106 when packing an integer: struct.pack('=L', -1) now raises
Mark Dickinsonb40b9472009-03-29 16:58:21 +0000107 struct.error instead of returning b'\xff\xff\xff\xff'. The
108 _PY_STRUCT_RANGE_CHECKING and _PY_STRUCT_OVERFLOW_MASKING constants
109 have been removed from the struct module.
Mark Dickinsonae681df2009-03-21 10:26:31 +0000110
Benjamin Petersond1735892009-03-07 18:46:21 +0000111
Benjamin Petersona58a6262009-03-07 16:34:40 +0000112What's New in Python 3.1 alpha 1
Barry Warsaw97f005d2008-12-03 16:46:14 +0000113================================
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000114
Benjamin Petersona58a6262009-03-07 16:34:40 +0000115*Release date: 2009-03-07*
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000116
117Core and Builtins
118-----------------
119
Benjamin Peterson4fa88fa2009-03-04 00:14:51 +0000120- The io module has been reimplemented in C for speed.
121
Raymond Hettingerb0d56af2009-03-03 10:52:49 +0000122- Give dict views an informative __repr__.
123
Eric Smith5e5c0db2009-02-20 14:25:03 +0000124- Issue #5247: Improve error message when unknown format codes are
125 used when using str.format() with str, int, and float arguments.
126
Hirokazu Yamamoto575d1332009-02-16 09:13:20 +0000127- Issue #5249: time.strftime returned malformed string when format string
128 contained non ascii character on windows.
129
Benjamin Petersonf5b52242009-03-02 23:31:26 +0000130- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
131 source has already been decoded into str.
132
Antoine Pitrou79eee6b2009-02-13 14:01:05 +0000133- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
134 rotating the object pointer by 4 bits to the right.
135
Mark Dickinson87ec0852009-02-09 17:15:59 +0000136- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
137 it now forces its argument to double before testing for infinity.
138
Benjamin Petersonee1ae7c2009-02-08 21:07:20 +0000139- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
140 returns a non-number type.
141
Benjamin Peterson87618552009-02-08 15:00:52 +0000142- Issue #5182: Removed memoryview.__str__.
143
Mark Dickinsonc008a172009-02-01 13:59:22 +0000144- Issue #1717: Removed builtin cmp() function, dropped tp_compare
145 slot, the C API functions PyObject_Compare and PyUnicode_Compare and
Mark Dickinsone94c6792009-02-02 20:36:42 +0000146 the type definition cmpfunc. The tp_compare slot has been renamed
147 to tp_reserved, and is reserved for future usage.
Mark Dickinsonf02e0aa2009-02-01 12:13:56 +0000148
Raymond Hettingere8364232009-02-02 22:55:09 +0000149- Issue 1242657: the __len__() and __length_hint__() calls in several tools
150 were suppressing all exceptions. These include list() and bytearray().
151
Mark Dickinson1124e712009-01-28 21:25:58 +0000152- Issue #4707: round(x, n) now returns an integer if x is an integer.
153 Previously it returned a float.
154
Antoine Pitroub52ec782009-01-25 16:34:23 +0000155- Issue #4753: By enabling a configure option named '--with-computed-gotos'
156 on compilers that support it (notably: gcc, SunPro, icc), the bytecode
157 evaluation loop is compiled with a new dispatch mechanism which gives
158 speedups of up to 20%, depending on the system, on various benchmarks.
159
Antoine Pitrou81fabdb2009-01-22 10:11:36 +0000160- Issue #4874: Most builtin decoders now reject unicode input.
161
Mark Dickinson9ffc0202009-01-20 20:45:53 +0000162- Issue #4842: Don't allow trailing 'L' when constructing an integer
163 from a string.
164
Benjamin Peterson05e782f2009-01-19 15:15:02 +0000165- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.
166
Antoine Pitroue4bc7f62009-01-17 21:06:43 +0000167- Issue #4838: When a module is deallocated, free the memory backing the
168 optional module state data.
169
Mark Dickinson8055afd2009-01-17 10:04:45 +0000170- Issue #4910: Rename nb_long slot to nb_reserved, and change its
171 type to (void *).
172
Antoine Pitrou8d4e5052009-01-13 22:59:11 +0000173- Issue #4935: The overflow checking code in the expandtabs() method common
174 to str, bytes and bytearray could be optimized away by the compiler, letting
175 the interpreter segfault instead of raising an error.
176
Amaury Forgeot d'Arcf343e012009-01-12 23:58:21 +0000177- Issue #3720: Fix a crash when an iterator modifies its class and removes its
178 __next__ method.
179
Mark Dickinsone5e298f2009-01-12 20:49:19 +0000180- Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
181 function no longer attempt to call the __long__ slot to convert an object
182 to an integer. Only the __int__ and __trunc__ slots are examined.
183
Martin v. Löwis7c2b66c2009-01-12 08:21:03 +0000184- Issue #4893: Use NT threading on CE.
185
Martin v. Löwisec59d042009-01-12 07:59:10 +0000186- Issue #4915: Port sysmodule to Windows CE.
187
Antoine Pitrouab868312009-01-10 15:40:25 +0000188- Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
189 common cases are optimized thanks to a dedicated fast path and a moderate
190 amount of loop unrolling.
191
Antoine Pitrou14b78f52009-01-09 22:27:08 +0000192- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
193 collecting the oldest generation) so that allocating lots of objects without
194 destroying them does not show quadratic performance. Based on a proposal by
195 Martin von Löwis at
196 http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
197
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000198- Issue #4604: Some objects of the I/O library could still be used after
Antoine Pitrou8043cf82009-01-09 19:54:29 +0000199 having been closed (for instance, a read() call could return some
200 previously buffered data). Patch by Dmitry Vasiliev.
201
Antoine Pitrou05608432009-01-09 18:53:14 +0000202- Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
203 flag to work properly. Furthermore, when specifying -u, the text stdout
204 and stderr streams have line-by-line buffering enabled (the default being
205 to buffer arbitrary chunks of data).
206
Raymond Hettinger35631532009-01-09 03:58:09 +0000207- The internal table, _PyLong_DigitValue, is now an array of unsigned chars
208 instead of ints (reducing its size from 4 to 8 times thereby reducing
209 Python's overall memory).
210
Antoine Pitroud35cbf62009-01-06 19:02:24 +0000211- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
212 an existing .py counterpart, override the co_filename attributes of all
213 code objects if the original filename is obsolete (which can happen if the
214 file has been renamed, moved, or if it is accessed through different paths).
215 Patch by Ziga Seilnacht and Jean-Paul Calderone.
216
Antoine Pitrouc3b39242009-01-03 16:59:18 +0000217- Issue #4580: Fix slicing of memoryviews when the item size is greater than
218 one byte. Also fixes the meaning of len() so that it returns the number of
219 items, rather than the size in bytes.
220
Martin v. Löwis5c88d812009-01-02 20:47:48 +0000221- Issue #4075: Use OutputDebugStringW in Py_FatalError.
222
Amaury Forgeot d'Arc374e2202009-01-01 23:05:36 +0000223- Issue #4747: When the terminal does not use utf-8, executing a script with
224 non-ascii characters in its name could fail with a "SyntaxError: None" error.
225
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000226- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
Hirokazu Yamamoto8ed9a802009-01-01 16:09:52 +0000227 file with `bytes' filename on Windows.
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000228
Antoine Pitrou7ddda782009-01-01 15:35:33 +0000229- Issue #3680: Reference cycles created through a dict, set or deque iterator
230 did not get collected.
231
Nick Coghlanf1f2f682008-12-30 07:29:12 +0000232- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
233 where the tp_hash and tp_dict slots are both NULL.
234
Georg Brandlccc47b62008-12-28 11:44:14 +0000235- Issue #4759: None is now allowed as the first argument of
236 bytearray.translate(). It was always allowed for bytes.translate().
237
Skip Montanaro80072cb2008-12-23 03:51:14 +0000238- Added test case to ensure attempts to read from a file opened for writing
239 fail.
240
Antoine Pitrou51f3ef92008-12-20 13:14:23 +0000241- Issue #3106: Speedup some comparisons (str/str and int/int).
242
Antoine Pitrouf289ae62008-12-18 11:06:25 +0000243- Issue #2183: Simplify and optimize bytecode for list, dict and set
244 comprehensions. Original patch for list comprehensions by Neal Norwitz.
245
Antoine Pitrou621601a2008-12-17 23:18:19 +0000246- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
247 print elapsed times, not only when some objects are uncollectable /
248 unreachable. Original patch by Neil Schemenauer.
249
Mark Dickinson54bc1ec2008-12-17 16:19:07 +0000250- Issue #3439: Add a bit_length method to int.
251
Mark Dickinsonda2706b2008-12-11 18:03:03 +0000252- Issue #2173: When getting device encoding, check that return value of
253 nl_langinfo is not the empty string. This was causing silent build
254 failures on OS X.
255
Jeffrey Yasskinb9083f32008-12-11 06:18:33 +0000256- Issue #4597: Fixed several opcodes that weren't always propagating
257 exceptions.
258
259- Issue #4589: Fixed exception handling when the __exit__ function of a
Amaury Forgeot d'Arc10b24e82008-12-10 23:49:33 +0000260 context manager returns a value that cannot be converted to a bool.
261
Mark Dickinsonfd24b322008-12-06 15:33:31 +0000262- Issue #4445: Replace "sizeof(PyBytesObject)" with
263 "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
264 bytes instances. On a typical machine this saves 3 bytes of memory
265 (on average) per allocation of a bytes instance.
266
Christian Heimesa872de52008-12-05 08:26:55 +0000267- Issue #4533: File read operation was dreadfully slow due to a slowly
268 growing read buffer. Fixed by using the same growth rate algorithm as
269 Python 2.x.
270
Antoine Pitrou5504e892008-12-06 21:27:53 +0000271- Issue #4509: Various issues surrounding resize of bytearray objects to
272 which there are buffer exports (e.g. memoryview instances).
273
Georg Brandlf9734072008-12-07 15:30:06 +0000274- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
275 method on file objects with closefd=False. The file descriptor is still
276 kept open but the file object behaves like a closed file. The ``FileIO``
277 object also got a new readonly attribute ``closefd``.
Matthias Klose7e1b8fa2008-11-26 17:22:04 +0000278
Antoine Pitroubc420402008-12-07 20:14:49 +0000279- Issue #4569: Interpreter crash when mutating a memoryview with an item size
280 larger than 1.
281
Benjamin Peterson371ccfb2008-12-27 19:03:36 +0000282- Issue #4748: Lambda generators no longer return a value.
283
Gregory P. Smithccc5ae72009-03-02 05:21:55 +0000284- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
285
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000286Library
287-------
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000288
Brett Cannonf47e84c2009-04-01 16:06:01 +0000289- Issue #1665206 (partially): Move imports in cgitb to the top of the module
290 instead of performing them in functions. Helps prevent import deadlocking in
291 threads.
292
R. David Murraye59482e2009-04-01 03:42:00 +0000293- Issue #2522: locale.format now checks its first argument to ensure it has
294 been passed only one pattern, avoiding mysterious errors where it appeared
295 that it was failing to do localization.
296
Tarek Ziadéb2e36f12009-03-31 22:37:55 +0000297- Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
298 Brandl.
299
Antoine Pitrou350370c2009-03-14 00:13:13 +0000300- Issue #1222: locale.format() bug when the thousands separator is a space
301 character.
302
Tarek Ziadé516db942009-03-11 12:52:00 +0000303- Issue #5472: Fixed distutils.test_util tear down. Original patch by
304 Tim Golden.
305
Raymond Hettinger5bb0f0e2009-03-10 12:56:32 +0000306- collections.deque() objects now have a read-only attribute called maxlen.
307
Guilherme Polof45b4cc2009-03-07 02:19:14 +0000308- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
309 it is has been populated and properly configured in order to prevent
310 window flashing.
311
Guilherme Polo56f5be52009-03-07 01:54:57 +0000312- Issue #4792: Prevent a segfault in _tkinter by using the
313 guaranteed to be safe interp argument given to the PythonCmd in place of
314 the Tcl interpreter taken from a PythonCmd_ClientData.
315
316- Issue #5193: Guarantee that tkinter.Text.search returns a string.
317
Tarek Ziadé63b64c02009-03-07 00:51:53 +0000318- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
319 Original patch by Akira Kitada.
320
Hirokazu Yamamoto54d0df62009-03-06 03:04:07 +0000321- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.
322
Hirokazu Yamamoto8e722bc2009-03-05 14:33:01 +0000323- Issue #5385: Fixed mmap crash after resize failure on windows.
324
Hirokazu Yamamoto0c988172009-03-03 22:41:26 +0000325- Issue #5179: Fixed subprocess handle leak on failure on windows.
326
Raymond Hettinger2d32f632009-03-02 21:24:57 +0000327- PEP 372: Added collections.OrderedDict().
328
Raymond Hettingera4f52b12009-03-02 22:28:31 +0000329- The _asdict() for method for namedtuples now returns an OrderedDict().
330
Raymond Hettinger0663a1e2009-03-02 23:06:00 +0000331- configparser now defaults to using an ordered dictionary.
332
Benjamin Petersone0124bd2009-03-09 21:04:33 +0000333- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
334 import guess_extension`` was used.
335
Hirokazu Yamamoto10c99372009-02-28 12:21:53 +0000336- Issue #1733986: Fixed mmap crash in accessing elements of second map object
337 with same tagname but larger size than first map. (Windows)
338
Hirokazu Yamamoto39c6dea2009-02-28 10:56:50 +0000339- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
340 overrun.
341
Tarek Ziadéf0721222009-02-28 10:16:43 +0000342- Issue #1533164: Installed but not listed *.pyo was breaking Distutils
343 bdist_rpm command.
344
345- Issue #5378: added --quiet option to Distutils bdist_rpm command.
346
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000347- Issue #5052: make Distutils compatible with 2.3 again.
348
Tarek Ziadé0f31e6d2009-02-25 22:31:38 +0000349- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
350 in Distutils tests.
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000351
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000352- Issue #5287: Add exception handling around findCaller() call to help out
353 IronPython.
354
Hirokazu Yamamoto0654ccd2009-02-18 16:38:00 +0000355- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
356 The file was resized to wrong size.
357
358- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
359
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000360- Issue #2279: distutils.sdist.add_defaults now add files
Tarek Ziadé0d0506e2009-02-16 21:49:12 +0000361 from the package_data and the data_files metadata.
362
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000363- Issue #5257: refactored all tests in distutils, so they use
Tarek Ziadéc1375d52009-02-14 14:35:51 +0000364 support.TempdirManager, to avoid writing in the tests directory.
365
Tarek Ziadé68c50952009-02-13 23:04:17 +0000366- Issue #4524: distutils build_script command failed with --with-suffix=3.
367 Initial patch by Amaury Forgeot d'Arc.
368
Tarek Ziadé811d6242009-02-13 22:26:15 +0000369- Issue #2461: added tests for distutils.util
370
Mark Dickinsonc28ad272009-02-12 17:58:36 +0000371- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
372 which inherited from numbers.py which did not have __slots__ defined. The
373 numbers hierarchy now has its own __slots__ declarations.
374
Antoine Pitroub353c122009-02-11 00:39:14 +0000375- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
376 encoding.
377
Thomas Heller465c8022009-02-10 18:59:04 +0000378- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
379 function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
380
Tarek Ziadé7d5e9872009-02-10 12:36:33 +0000381- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
382 under NT and OS2. Patch by Philip Jenvey.
383
Brett Cannonbefb14f2009-02-10 02:10:16 +0000384- Issue #5128: Make compileall properly inspect bytecode to determine if needs
385 to be recreated. This avoids a timing hole thanks to the old reliance on the
386 ctime of the files involved.
387
Guilherme Polob681df42009-02-09 22:33:59 +0000388- Issue #5122: Synchronize tk load failure check to prevent a potential
389 deadlock.
390
Benjamin Petersona86f2c02009-02-10 02:41:10 +0000391- Issue #1818: collections.namedtuple() now supports a keyword argument
392 'rename' which lets invalid fieldnames be automatically converted to
393 positional names in the form, _1, _2, ...
394
Guilherme Poloae098992009-02-09 16:44:24 +0000395- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
396
Nick Coghlan9a1d6e32009-02-08 03:37:27 +0000397- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
398 public documented method ``ZipImporter.get_filename()``.
399
Nick Coghlan3f48ae32009-02-08 01:58:26 +0000400- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
401 the execution of packages by looking for and executing a ``__main__``
402 submodule when a package name is supplied. Initial patch by Andi
403 Vajda.
404
Guilherme Polo491aee22009-02-06 23:16:11 +0000405- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
406 not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
407 Tkapp_Call when calling from a thread different than the one that created
408 the Tcl interpreter. Patch by Robert Hancock.
409
Eric Smith0e5b5622009-02-06 01:32:42 +0000410- Issue #4285: Change sys.version_info to be a named tuple. Patch by
411 Ross Light.
412
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000413- Issue #1520877: Now distutils.sysconfig reads $AR from the
Tarek Ziadéd3409de2009-02-06 01:18:36 +0000414 environment/Makefile. Patch by Douglas Greiman.
415
Tarek Ziadé70a74eb2009-02-06 00:38:35 +0000416- Issue #1276768: The verbose option was not used in the code of
417 distutils.file_util and distutils.dir_util.
418
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000419- Issue #5132: Fixed trouble building extensions under Solaris with
Tarek Ziadé5874ef12009-02-05 22:56:14 +0000420 --enabled-shared activated. Initial patch by Dave Peterson.
421
Guilherme Polo7f423952009-02-02 21:17:09 +0000422- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
423
Raymond Hettinger85602262009-02-03 04:19:10 +0000424- The shelve module now defaults to pickle protocol 3.
425
Brett Cannone61426e2009-01-30 01:31:34 +0000426- Fix a bug in the trace module where a bytes object from co_lnotab had its
427 items being passed through ord().
428
Antoine Pitrou0dcc3cd2009-01-29 20:26:59 +0000429- Issue #2047: shutil.move() could believe that its destination path was
430 inside its source path if it began with the same letters (e.g. "src" vs.
431 "src.new").
432
Guilherme Polo5f238482009-01-28 14:41:10 +0000433- Added the ttk module. See issue #2983: Ttk support for Tkinter.
434
Raymond Hettinger89e12962009-01-26 02:09:03 +0000435- Removed isSequenceType(), isMappingType, and isNumberType() from the
436 operator module; use the abstract base classes instead. Also removed
437 the repeat() function; use mul() instead.
438
Raymond Hettinger0f055172009-01-27 10:06:09 +0000439- Issue 5021: doctest.testfile() did not create __name__ and
440 collections.namedtuple() relied on __name__ being defined.
441
442- Backport importlib from Python 3.1. Only the import_module() function has
443 been backported to help facilitate transitions from 2.7 to 3.1.
444
Tarek Ziadé0302cf52009-01-26 17:23:20 +0000445- Issue #1885: distutils. When running sdist with --formats=tar,gztar
446 the tar file was overriden by the gztar one.
447
Tarek Ziadé4d4456f2009-01-25 18:27:45 +0000448- Issue #4863: distutils.mwerkscompiler has been removed.
449
Raymond Hettingerd07d9392009-01-27 04:20:44 +0000450- Added a new itertools functions: combinations_with_replacement()
451 and compress().
Raymond Hettinger6b3b0fc2009-01-26 02:56:58 +0000452
Raymond Hettinger30729212009-02-12 06:28:27 +0000453- Issue 5032: added a step argument to itertools.count() and
454 allowed non-integer arguments.
455
Jesse Noller41faa542009-01-25 03:45:53 +0000456- Fix and properly document the multiprocessing module's logging
457 support, expose the internal levels and provide proper usage
458 examples.
459
Mark Dickinsoncddcf442009-01-24 21:46:33 +0000460- Issue #1672332: fix unpickling of subnormal floats, which was
461 producing a ValueError on some platforms.
462
Martin v. Löwisacbf4612009-01-24 16:19:45 +0000463- Issue #3881: Help Tcl to load even when started through the
464 unreadable local symlink to "Program Files" on Vista.
465
Martin v. Löwis59e47792009-01-24 14:10:07 +0000466- Issue #4710: Extract directories properly in the zipfile module;
467 allow adding directories to a zipfile.
468
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000469- Issue #3807: _multiprocessing build fails when configure is passed
Jesse Noller6fd47e22009-01-23 14:09:08 +0000470 --without-threads argument. When this occurs, _multiprocessing will
471 be disabled, and not compiled.
472
Antoine Pitrou08838b62009-01-21 00:55:13 +0000473- Issue #5008: When a file is opened in append mode with the new IO library,
474 do an explicit seek to the end of file (so that e.g. tell() returns the
475 file size rather than 0). This is consistent with the behaviour of the
476 traditional 2.x file object.
477
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000478- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
479 parameter was set.
480
Mark Dickinson8dd05142009-01-20 20:43:58 +0000481- Issue #4842: Always append a trailing 'L' when pickling longs using
482 pickle protocol 0. When reading, the 'L' is optional.
483
Brett Cannonafccd632009-01-20 02:21:27 +0000484- Add the importlib package.
485
Jesse Noller9a0fc972009-01-18 21:12:58 +0000486- Issue #4301: Patch the logging module to add processName support, remove
487 _check_logger_class from multiprocessing.
488
Jesse Noller1cbb17a2009-01-18 19:45:18 +0000489- Issue #3325: Remove python2.x try: except: imports for old cPickle from
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000490 multiprocessing.
Jesse Nollerf70a5382009-01-18 19:44:02 +0000491
Benjamin Peterson9953a8d2009-01-17 04:15:01 +0000492- Issue #4959: inspect.formatargspec now works for keyword only arguments
493 without defaults.
494
Jesse Noller6214edd2009-01-19 16:23:53 +0000495- Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
496 for *nix machines for negative handles and large int handles. Without this check
497 it is possible to segfault the interpreter.
498
Jesse Nollerb0516a62009-01-18 03:11:38 +0000499- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
500 in sharedctypes.py.
501
502- Issue #1225107: inspect.isclass() returned True for instances with a custom
503 __getattr__.
504
Gregory P. Smithde3369f2009-01-12 04:50:11 +0000505- Issue #3826 and #4791: The socket module now closes the underlying socket
506 appropriately when it is being used via socket.makefile() objects
507 rather than delaying the close by waiting for garbage collection to do it.
508
Raymond Hettingerb8baf632009-01-14 02:20:07 +0000509- Issue #1696199: Add collections.Counter() for rapid and convenient
510 counting.
511
Antoine Pitrou308705e2009-01-10 16:22:51 +0000512- Issue #3860: GzipFile and BZ2File now support the context manager protocol.
513
Thomas Heller5e4e4272009-01-08 09:34:20 +0000514- Issue #4867: Fixed a crash in ctypes when passing a string to a
515 function without defining argtypes.
516
Antoine Pitrou42db3ef2009-01-04 21:37:59 +0000517- Issue #4272: Add an optional argument to the GzipFile constructor to override
518 the timestamp in the gzip stream. The default value remains the current time.
519 The information can be used by e.g. gunzip when decompressing. Patch by
520 Jacques Frechet.
521
Mark Dickinson315a20a2009-01-04 21:34:18 +0000522- Restore Python 2.3 compatibility for decimal.py.
523
Guilherme Polo3f5f8222009-01-03 22:00:39 +0000524- Issue #3638: Remove functions from _tkinter module level that depend on
525 TkappObject to work with multiple threads.
526
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000527- Issue #4718: Adapt the wsgiref package so that it actually works with
528 Python 3.x, in accordance with the `official amendments of the spec
Antoine Pitrou38a66ad2009-01-03 18:41:49 +0000529 <http://www.wsgi.org/wsgi/Amendments_1.0>`_.
530
Raymond Hettinger771ed762009-01-03 19:20:32 +0000531- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
532 to the decimal module.
533
Georg Brandl3a9b0622009-01-03 22:07:57 +0000534- Fractions.from_float() no longer loses precision for integers too big to
535 cast as floats.
536
Mark Dickinsonf9236412009-01-02 23:23:21 +0000537- Issue #4812: add missing underscore prefix to some internal-use-only
538 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
539
Georg Brandl3a9b0622009-01-03 22:07:57 +0000540- Issue 4790: The nsmallest() and nlargest() functions in the heapq module
541 did unnecessary work in the common case where no key function was specified.
542
Georg Brandlb1441c72009-01-03 22:33:39 +0000543- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
544 the function is not a generator.
545
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000546- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
547 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
Tarek Ziadé9df8ce32008-12-30 23:09:20 +0000548
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000549- Issue #4646: distutils was choking on empty options arg in the setup
Tarek Ziadé4450dcf2008-12-29 22:38:38 +0000550 function. Original patch by Thomas Heller.
551
Martin v. Löwis1f1620e2008-12-29 16:27:13 +0000552- Issue #3767: Convert Tk object to string in tkColorChooser.
553
Martin v. Löwise354d782008-12-29 16:03:04 +0000554- Issue #3248: Allow placing ScrolledText in a PanedWindow.
555
Antoine Pitrou5acd41e2008-12-28 14:29:00 +0000556- Issue #4444: Allow assertRaises() to be used as a context handler, so that
557 the code under test can be written inline if more practical.
558
Georg Brandldb7b6b92009-01-01 15:53:14 +0000559- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
560 works as expected in the interactive environment.
561
Antoine Pitroudb5fe662008-12-27 15:50:40 +0000562- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
563 Gabriel Genellina.
564
Antoine Pitrou180a3362008-12-14 16:36:46 +0000565- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
566 boundary.
567
Nick Coghlanf088e5e2008-12-14 11:50:48 +0000568- Issue #4223: inspect.getsource() will now correctly display source code
569 for packages loaded via zipimport (or any other conformant PEP 302
570 loader). Original patch by Alexander Belopolsky.
571
572- Issue #4201: pdb can now access and display source code loaded via
573 zipimport (or any other conformant PEP 302 loader). Original patch by
574 Alexander Belopolsky.
575
576- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
577 302 conformant loader) will now work correctly in most cases (they
578 are still subject to the constraints that exist for all code running
579 from inside a module loaded via a PEP 302 loader and attempting to
580 perform IO operations based on __file__). Original patch by
581 Alexander Belopolsky.
582
583- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
584 allows backporting to maintenance branches. Original patch by
585 Alexander Belopolsky.
586
Antoine Pitrou7c59bc62008-12-13 23:20:54 +0000587- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
588 a non-ASCII letter.
589
Lars Gustäbel43fcf3a2008-12-12 14:58:38 +0000590- Issue #4616: TarFile.utime(): Restore directory times on Windows.
591
Benjamin Peterson433f32c2008-12-12 01:25:05 +0000592- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
593 codec cannot be found. This is for compatibility with the builtin behavior.
594
Facundo Batista708d5812008-12-11 04:20:07 +0000595- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
596 give correct results in the case where one argument is a quiet NaN
597 and the other is a finite number that requires rounding.
598
Skip Montanaroc1ce2862008-12-06 17:25:02 +0000599- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
600 libs.
601
Georg Brandlf9734072008-12-07 15:30:06 +0000602- Added the subprocess.check_call_output() convenience function to get output
603 from a subprocess on success or raise an exception on error.
604
605- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
606 support unusual filenames (such as those containing semi-colons) in
607 Content-Disposition headers.
608
609- Issue #4384: Added logging integration with warnings module using
610 captureWarnings(). This change includes a NullHandler which does nothing;
611 it will be of use to library developers who want to avoid the "No handlers
612 could be found for logger XXX" message which can appear if the library user
613 doesn't configure logging.
614
615- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
616 exception.
617
Georg Brandleee31162008-12-07 15:15:22 +0000618- Issue #4529: fix the parser module's validation of try-except-finally
619 statements.
620
621- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
622 not a malformed option.
623
624- Added the subprocess.check_output() convenience function to get output
625 from a subprocess on success or raise an exception on error.
626
Amaury Forgeot d'Arcbc9d4742008-12-05 01:40:43 +0000627- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
628 the corresponding tests now pass.
629
Amaury Forgeot d'Arcbc2ce572008-12-05 01:02:21 +0000630- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
631 it was calling the wrong open() function.
632
Fred Drake9a0a65b2008-12-04 19:24:50 +0000633- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
634 support unusual filenames (such as those containing semi-colons) in
635 Content-Disposition headers.
636
Matthias Klose2c7e3ee2009-01-10 17:08:25 +0000637- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
638 biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
639
Benjamin Peterson5c6d7872009-02-06 02:40:07 +0000640- Issue #5104: The socket module now raises OverflowError when 16-bit port and
641 protocol numbers are supplied outside the allowed 0-65536 range on bind()
642 and getservbyport().
643
Antoine Pitrou2a013ea2008-12-27 20:39:28 +0000644Tools/Demos
645-----------
646
Antoine Pitrou8a681222009-02-07 17:13:31 +0000647- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
648 and make it 2.6-compatible.
649
Guilherme Poloa7d27972009-01-28 16:06:51 +0000650- Ttk demos added in Demo/tkinter/ttk/
651
Antoine Pitrou2a013ea2008-12-27 20:39:28 +0000652- Issue #4677: add two list comprehension tests to pybench.
653
Georg Brandlb1441c72009-01-03 22:33:39 +0000654
655Build
656-----
657
Matthias Klose906785c2009-02-22 23:18:38 +0000658- Link the shared python library with $(MODLIBS).
659
Martin v. Löwis11f72102009-02-10 13:13:30 +0000660- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
661
Martin v. Löwisbc186a82009-02-02 15:32:22 +0000662- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
663
Martin v. Löwise97637d2009-01-11 09:45:11 +0000664- Issue #4895: Use _strdup on Windows CE.
665
Georg Brandlb1441c72009-01-03 22:33:39 +0000666- Issue #4472: "configure --enable-shared" now works on OSX
667
668- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
669
670- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
671
672- Issue #4289: Remove Cancel button from AdvancedDlg.
673
674- Issue #1656675: Register a drop handler for .py* files on Windows.
675
676- Issue #4120: Exclude manifest from extension modules in VS2008.
677
678- Issue #4091: Install pythonxy.dll in system32 again.
679
680- Issue #4018: Disable "for me" installations on Vista.
681
682- Issue #3758: Add ``patchcheck`` build target to .PHONY.
683
684- Issue #4204: Fixed module build errors on FreeBSD 4.
685
686
687C-API
688-----
689
Mark Dickinson21776072009-02-10 16:13:25 +0000690- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
691 for negative arguments. Previously, it raised TypeError.
692
Georg Brandlb1441c72009-01-03 22:33:39 +0000693- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
694
695- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
696 the GIL is released, or owned by another thread.
697
698- Issue #4122: On Windows, fix a compilation error when using the
699 Py_UNICODE_ISSPACE macro in an extension module.
700
701
Mark Dickinsone675f082008-12-11 21:56:00 +0000702Extension Modules
703-----------------
704
Gregory P. Smith365a1862009-02-12 07:35:29 +0000705- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
706 supporting objects as input no matter how it was compiled (built in
707 implementations or external openssl library).
708
Mark Dickinson29500f62009-01-15 15:36:10 +0000709- Issue #4397: Fix occasional test_socket failure on OS X.
710
Martin v. Löwisa9b54c72009-01-11 09:30:50 +0000711- Issue #4279: Fix build of parsermodule under Cygwin.
712
Antoine Pitroubcd5cbe2009-01-08 21:17:16 +0000713- Issue #4751: hashlib now releases the GIL when hashing large buffers
714 (with a hardwired threshold of 2048 bytes), allowing better parallelization
715 on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.
716
Martin v. Löwis5c88d812009-01-02 20:47:48 +0000717- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
718
Antoine Pitrou31f30b12009-01-02 17:34:35 +0000719- Issue #4738: Each zlib object now has a separate lock, allowing to compress
720 or decompress several streams at once on multi-CPU systems. Also, the GIL
721 is now released when computing the CRC of a large buffer. Patch by ebfe.
722
Georg Brandlb1441c72009-01-03 22:33:39 +0000723- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
724
Martin v. Löwis05bfe1f2008-12-29 18:21:47 +0000725- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
726
Mark Dickinsone675f082008-12-11 21:56:00 +0000727- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
728 OpenBSD.
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +0000729
Antoine Pitrou3ad3a0d2008-12-18 17:08:32 +0000730- Issue #4583: array.array would not always prohibit resizing when a buffer
731 has been exported, resulting in an interpreter crash when accessing the
732 buffer.
733
Martin v. Löwis841edad2008-11-30 10:36:49 +0000734
Jack Diederiche0cbd692009-04-01 04:27:09 +0000735- Issue #5228: Make functools.partial objects can now be pickled.
736
Guilherme Polo9de29af2009-01-28 20:40:48 +0000737Tests
738-----
739
R. David Murraya21e4ca2009-03-31 23:16:50 +0000740- regrtest no longer treats ImportError as equivalent to SkipTest. Imports
741 that should cause a test to be skipped are now done using import_module
742 from test support, which does the conversion.
743
Guilherme Polo9de29af2009-01-28 20:40:48 +0000744- Issue #5083: New 'gui' resource for regrtest.
745
746
Brett Cannon7317c1e2008-11-25 19:19:17 +0000747Docs
748----
749
Georg Brandl52b92cc2008-05-25 09:43:03 +0000750
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000751**(For information about older versions, consult the HISTORY file.)**