blob: ea5d09025f51e091d26c5549c683cd2ec15694fc [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
Mark Dickinson4eb88b32009-05-11 16:41:34 +00007What's New in Python 3.1 release candidate 1?
8=============================================
Benjamin Petersonaccdca52009-05-06 23:26:59 +00009
10*Release date: XXXX-XX-XX*
11
12Core and Builtins
13-----------------
14
Mark Dickinson6b1e43b2009-05-20 18:41:04 +000015- Issue #5829: complex("1e500") no longer raises OverflowError. This
16 makes it consistent with float("1e500") and interpretation of real
17 and imaginary literals.
18
Hirokazu Yamamoto8223c242009-05-17 04:21:53 +000019- Issue #3527: Removed Py_WIN_WIDE_FILENAMES which is not used any more.
20
R. David Murraydd226ea2009-05-13 12:27:21 +000021- Issue #5994: the marshal module now has docstrings.
22
Mark Dickinsond1ec8b22009-05-11 15:45:15 +000023- Issue #5981: Fix three minor inf/nan issues in float.fromhex:
24 (1) inf and nan strings with trailing whitespace were incorrectly
25 rejected; (2) parsing of strings representing infinities and nans
26 was locale aware; and (3) the interpretation of fromhex('-nan')
27 didn't match that of float('-nan').
28
Benjamin Petersonaccdca52009-05-06 23:26:59 +000029Library
30-------
31
Antoine Pitrou6e610062009-05-15 17:04:50 +000032- Issue #2116: Weak references and weak dictionaries now support copy()ing and
33 deepcopy()ing.
34
Antoine Pitrouc1d09362009-05-15 12:15:51 +000035- Issue #1655: Make imaplib IPv6-capable. Patch by Derek Morr.
36
Antoine Pitrou37d1c182009-05-14 21:54:00 +000037- Issue #5918: Fix a crash in the parser module.
38
Antoine Pitrou2ca24f02009-05-14 21:30:46 +000039- Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.
40
Antoine Pitroue4501852009-05-14 18:55:55 +000041- Issue #5006: Better handling of unicode byte-order marks (BOM) in the io
42 library. This means, for example, that opening an UTF-16 text file in
43 append mode doesn't add a BOM at the end of the file if the file isn't
44 empty.
45
R. David Murray74b89242009-05-13 17:33:03 +000046- Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
47 file is a binary. Patch by Brodie Rao, tests by Daniel Diniz. This fix
48 corrects a pydoc regression.
49
R. David Murray99352742009-05-07 18:24:38 +000050- Issue 5955: aifc's close method did not close the file it wrapped,
51 now it does. This also means getfp method now returns the real fp.
52
Benjamin Petersonaccdca52009-05-06 23:26:59 +000053
Brett Cannon1262e7c2009-05-11 01:47:11 +000054Tests
55-----
56
57- Issue 5442: Tests for importlib were not properly skipping case-sensitivity
58 tests on darwin even when the OS was installed on a case-sensitive
59 filesystem. Also fixed tests that should not be run when
60 sys.dont_write_bytecode is true.
61
62
Benjamin Petersonbd35b032009-04-04 23:16:41 +000063What's New in Python 3.1 beta 1?
64================================
65
Benjamin Peterson5c5f3de2009-05-06 20:43:28 +000066*Release date: 2009-05-06*
Benjamin Petersonbd35b032009-04-04 23:16:41 +000067
68Core and Builtins
69-----------------
70
Mark Dickinson865e01a2009-05-07 16:37:01 +000071- Issue #5914: Add new C API function PyOS_string_to_double, and
72 deprecate PyOS_ascii_strtod and PyOS_ascii_atof.
73
Eric Smith741191f2009-05-06 13:08:15 +000074- Issue #3382: float.__format__, complex.__format__, and %-formatting
75 no longer map 'F' to 'f'. Because of issue #5859 (below), this only
76 affects nan -> NAN and inf -> INF.
77
Mark Hammond5a607a32009-05-06 08:04:54 +000078- Issue #5799: ntpath (ie, os.path on Windows) fully supports UNC pathnames
79 in all operations, including splitdrive, split, etc. splitunc() now issues
80 a PendingDeprecation warning.
81
Eric Smith63376222009-05-05 14:04:18 +000082- Issue #5920: For float.__format__, change the behavior with the
83 empty presentation type (that is, not one of 'e', 'f', 'g', or 'n')
84 to be like 'g' but with at least one decimal point and with a
85 default precision of 12. Previously, the behavior the same but with
86 a default precision of 6. This more closely matches str(), and
87 reduces surprises when adding alignment flags to the empty
88 presentation type. This also affects the new complex.__format__ in
89 the same way.
90
Martin v. Löwis011e8422009-05-05 04:43:17 +000091- Implement PEP 383, Non-decodable Bytes in System Character Interfaces.
92
R. David Murrayb18500d2009-05-04 22:59:07 +000093- Issue #5890: in subclasses of 'property' the __doc__ attribute was
94 shadowed by classtype's, even if it was None. property now
95 inserts the __doc__ into the subclass instance __dict__.
96
Antoine Pitrou244651a2009-05-04 18:56:13 +000097- Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
98 sequences. Patch by Nick Barnes and Victor Stinner.
99
Martin v. Löwise0a2b722009-05-10 08:08:56 +0000100- Issue #3672: Reject surrogates in utf-8 codec; add surrogatepass error handler.
Martin v. Löwisdb12d452009-05-02 18:52:14 +0000101
Benjamin Petersond2e0c792009-05-01 20:40:59 +0000102- Issue #5883: In the io module, the BufferedIOBase and TextIOBase ABCs have
103 received a new method, detach(). detach() disconnects the underlying stream
104 from the buffer or text IO and returns it.
105
Mark Dickinson33841c32009-05-01 15:37:04 +0000106- Issue #5859: Remove switch from '%f' to '%g'-style formatting for
107 floats with absolute value over 1e50. Also remove length
108 restrictions for float formatting: '%.67f' % 12.34 and '%.120e' %
109 12.34 no longer raise an exception.
Mark Dickinsonf489caf2009-05-01 11:42:00 +0000110
Eric Smith741191f2009-05-06 13:08:15 +0000111- Issue #1588: Add complex.__format__. For example,
Eric Smith58a42242009-04-30 01:00:33 +0000112 format(complex(1, 2./3), '.5') now produces a sensible result.
113
Mark Dickinsond3ca5572009-04-29 18:47:07 +0000114- Issue #5864: Fix empty format code formatting for floats so that it
115 never gives more than the requested number of significant digits.
116
Eric Smith6dc46f52009-04-27 20:39:49 +0000117- Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
118 new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.
119
Eric Smithcc32a112009-04-26 21:35:14 +0000120- Issue #5835: Deprecate PyOS_ascii_formatd.
121
Martin v. Löwis71efeb72009-04-26 01:02:07 +0000122- Issue #4971: Fix titlecase for characters that are their own
123 titlecase, but not their own uppercase.
124
Benjamin Peterson193152c2009-04-25 01:08:45 +0000125- Issue #5283: Setting __class__ in __del__ caused a segfault.
126
Mark Dickinsonad476da2009-04-23 19:14:16 +0000127- Issue #5816: complex(repr(z)) now recovers z exactly, even when
128 z involves nans, infs or negative zeros.
129
Mark Dickinson4a16e3a2009-04-23 19:15:48 +0000130- Issue #3166: Make int -> float conversions correctly rounded.
Mark Dickinsonc6300392009-04-20 21:38:00 +0000131
Mark Dickinsone6a076d2009-04-18 11:48:33 +0000132- Issue #1869 (and many duplicates): make round(x, n) correctly
133 rounded for a float x, by using the decimal <-> binary conversions
134 from Python/dtoa.c. As a consequence, (e.g.) round(x, 2) now
135 consistently agrees with format(x, '.2f').
136
Benjamin Petersonae937c02009-04-18 20:54:08 +0000137- Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
138 some builtin types.
139
Eric Smith0923d1d2009-04-16 20:16:10 +0000140- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'.
141
Eric Smith35e84722009-04-16 20:21:28 +0000142- Issue #5515: str.format() type 'n' combined with commas and leading
143 zeros no longer gives odd results with ints and floats.
Eric Smith0923d1d2009-04-16 20:16:10 +0000144
145- Implement PEP 378, Format Specifier for Thousands Separator, for
146 floats.
147
Mark Dickinson3370cce2009-04-17 22:40:53 +0000148- The str function switches to exponential notation at
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000149 1e11, not 1e12. This avoids printing 13 significant digits in
150 situations where only 12 of them are correct. Example problem
151 value: str(1e11 + 0.5). (This minor issue has existed in 2.x for a
152 long time.)
153
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000154- Issue #1580: On most platforms, use a 'short' float repr: for a
155 finite float x, repr(x) now outputs a string based on the shortest
156 sequence of decimal digits that rounds to x. Previous behaviour was
157 to output 17 significant digits and then strip trailing zeros.
Mark Dickinson3370cce2009-04-17 22:40:53 +0000158 Another minor difference is that the new repr switches to
159 exponential notation at 1e16 instead of the previous 1e17; this
160 avoids misleading output in some cases.
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000161
162 There's a new sys attribute sys.float_repr_style, which takes
163 the value 'short' to indicate that we're using short float repr,
164 and 'legacy' if the short float repr isn't available for one
165 reason or another.
166
167 The float repr change involves incorporating David Gay's 'perfect
168 rounding' code into the Python core (it's in Python/dtoa.c). As a
169 secondary consequence, all string-to-float and float-to-string
170 conversions (including all float formatting operations) will be
171 correctly rounded on these platforms.
172
173 See issue 1580 discussions for details of platforms for which
174 this change does not apply.
175
Benjamin Peterson2808d3c2009-04-15 21:34:27 +0000176- Issue #5759: float() didn't call __float__ on str subclasses.
177
Georg Brandlabc38772009-04-12 15:51:51 +0000178- The string.maketrans() function is deprecated; there is a new static method
179 maketrans() on the bytes and bytearray classes. This removes confusion about
180 the types string.maketrans() is supposed to work with, and mirrors the
181 methods available on the str class.
182
R. David Murraydc6da8a2009-04-09 22:16:43 +0000183- Issue #2170: refactored xml.dom.minidom.normalize, increasing both
184 its clarity and its speed.
185
Matthias Klose091c7b12009-04-07 13:24:27 +0000186- Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
187 to avoid compiler warnings.
188
Walter Dörwald8dc33d52009-05-06 14:41:26 +0000189- Issue #3739: The unicode-internal encoder now reports the number of characters
190 consumed like any other encoder (instead of the number of bytes).
191
Benjamin Peterson0b4915e2009-04-25 21:11:45 +0000192Installation
193------------
194
195- Issue #5756: Install idle and pydoc with a 3 suffix.
196
Benjamin Petersonbd35b032009-04-04 23:16:41 +0000197Library
198-------
199
Tarek Ziadédd9f65f2009-05-06 07:26:24 +0000200- Issue #5940: distutils.command.build_clib.check_library_list was not doing
201 the right type checkings anymore.
202
Thomas Heller00cfc372009-05-05 19:04:40 +0000203- Issue #4875: On win32, ctypes.util.find_library does no longer
204 return directories.
205
Georg Brandl243ad662009-05-05 09:00:19 +0000206- Issue #5142: Add the ability to skip modules while stepping to pdb.
207
Georg Brandl991f9202009-05-05 08:31:54 +0000208- Issue #1309567: Fix linecache behavior of stripping subdirectories when
209 looking for files given by a relative filename.
210
Georg Brandleaa84ef2009-05-05 08:14:33 +0000211- Issue #5923: Update the ``turtle`` module to version 1.1, add two new
212 turtle demos in Demo/turtle.
213
Antoine Pitrou3c33e082009-05-04 21:21:36 +0000214- Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
215 extracting a file to the root directory.
216
Hirokazu Yamamotobbb9be72009-05-04 05:56:46 +0000217- Issue #5913: os.listdir() should fail for empty path on windows.
218
Antoine Pitroua9f48a02009-05-02 21:41:14 +0000219- Issue #5084: unpickling now interns the attribute names of pickled objects,
220 saving memory and avoiding growth in size of subsequent pickles. Proposal
221 and original patch by Jake McGuire.
222
Benjamin Petersonc6b607d2009-05-02 12:36:44 +0000223- The json module now works exclusively with str and not bytes.
224
Gregory P. Smithe54dff52009-05-01 22:13:48 +0000225- Issue #3959: The ipaddr module has been added to the standard library.
226 Contributed by Google.
227
Antoine Pitrou7fff0962009-05-01 21:09:44 +0000228- Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
229 error when a named pipe is encountered, rather than blocking infinitely.
230
Raymond Hettinger1f0db402009-04-29 00:38:08 +0000231- Issue #5857: tokenize.tokenize() now returns named tuples.
232
Thomas Hellerc1edc2d2009-04-28 19:55:58 +0000233- Issue #4305: ctypes should now build again on mipsel-linux-gnu
234
Antoine Pitrou7a0fedf2009-04-27 22:31:40 +0000235- Issue #1734234: Massively speedup ``unicodedata.normalize()`` when the
236 string is already in normalized form, by performing a quick check beforehand.
237 Original patch by Rauli Ruohonen.
238
Antoine Pitrou57f3d932009-04-27 21:04:19 +0000239- Issue #5853: calling a function of the mimetypes module from several threads
240 at once could hit the recursion limit if the mimetypes database hadn't been
241 initialized before.
242
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000243- Issue #5854: Updated __all__ to include some missing names and remove some
244 names which should not be exported.
245
Thomas Heller34596a92009-04-24 20:50:00 +0000246- Issue #3102: All global symbols that the _ctypes extension defines
247 are now prefixed with 'Py' or '_ctypes'.
248
249- Issue #5041: ctypes does now allow pickling wide character.
250
Mark Dickinsond4d95f82009-04-24 14:06:19 +0000251- Issue #5812: For the two-argument form of the Fraction constructor,
252 Fraction(m, n), m and n are permitted to be arbitrary Rational
253 instances.
254
Mark Dickinsoncf63f2f2009-04-22 17:50:21 +0000255- Issue #5812: Fraction('1e6') is valid: more generally, any string
256 that's valid for float() is now valid for Fraction(), with the
257 exception of strings representing NaNs and infinities.
258
Antoine Pitroucf4c7492009-04-19 00:09:36 +0000259- Issue #5734: BufferedRWPair was poorly tested and had several glaring
260 bugs. Patch by Brian Quinlan.
261
R. David Murray9e94ddf2009-04-13 17:06:33 +0000262- Issue #1161031: fix readwrite select flag handling: POLLPRI now
263 results in a handle_expt_event call, not handle_read_event, and POLLERR
264 and POLLNVAL now call handle_close, not handle_expt_event. Also,
265 dispatcher now has an 'ignore_log_types' attribute for suppressing
266 log messages, which is set to 'warning' by default.
267
Matthias Klosea3d29e82009-04-07 13:13:10 +0000268- Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
269 new arguments introduced in 2.5.
270
Walter Dörwald1b08b302009-04-25 14:13:56 +0000271- Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
272 makeunicodedata.py and regenerated the Unicode database (This fixes
273 u'\u1d79'.lower() == '\x00').
274
Matthias Klose535336f2009-04-07 13:49:45 +0000275Extension Modules
276-----------------
277
Benjamin Petersone04b6272009-05-04 22:25:21 +0000278- Issue #5881: Remove old undocumented compatibility interfaces in hashlib and
279 pwd.
280
Mark Dickinsonea835e72009-04-19 20:40:33 +0000281- Issue #5463: In struct module, remove deprecated float coercion
282 for integer type codes: struct.pack('L', 0.3) should now raise
283 an error. The _PY_STRUCT_FLOAT_COERCE constant has been removed.
284 The version number has been bumped to 0.3.
285
Matthias Klose535336f2009-04-07 13:49:45 +0000286- Issue #5359: Readd the Berkley-DB detection code to allow _dbm be built
287 using Berkley-DB.
288
Nick Coghlan47384702009-04-22 16:13:36 +0000289Tests
290-----
291
292- Issue #5354: New test support function import_fresh_module() makes
293 it easy to import both normal and optimised versions of modules.
294 test_heapq and test_warnings have been adjusted to use it, tests for
295 other modules with both C and Python implementations in the stdlib
296 can be adjusted to use it over time.
297
Walter Dörwald4ba80132009-04-25 12:48:43 +0000298- Issue #5837: Certain sequences of calls to set() and unset() for
299 support.EnvironmentVarGuard objects restored the environment variables
300 incorrectly on __exit__.
301
Benjamin Petersonb173f782009-05-05 22:31:58 +0000302C-API
303-----
304
305- Issue #5630: A replacement PyCObject API, PyCapsule, has been added.
306
Benjamin Petersonbd35b032009-04-04 23:16:41 +0000307
Benjamin Petersond1735892009-03-07 18:46:21 +0000308What's New in Python 3.1 alpha 2?
309=================================
310
Benjamin Peterson88f14352009-04-04 21:06:52 +0000311*Release date: 2009-4-4*
Benjamin Petersond1735892009-03-07 18:46:21 +0000312
313Core and Builtins
314-----------------
Benjamin Petersone099b372009-04-04 17:09:35 +0000315
Eric Smith1e1d7d22009-04-03 22:25:33 +0000316- Implement PEP 378, Format Specifier for Thousands Separator, for
317 integers.
Benjamin Petersond1735892009-03-07 18:46:21 +0000318
Benjamin Peterson8f76b492009-04-03 22:22:42 +0000319- Issue #5666: Py_BuildValue's 'c' code should create byte strings.
320
Benjamin Peterson7fe98532009-04-02 00:33:55 +0000321- Issue #5499: The 'c' code for argument parsing functions now only accepts a
322 byte, and the 'C' code only accepts a unicode character.
323
Georg Brandl406b3d82009-04-11 21:24:37 +0000324- Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
325 when hitting the recursion limit under certain circumstances.
326
Brett Cannon0759dd62009-04-01 18:13:07 +0000327- Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.
328
Georg Brandlab6f2f62009-03-31 04:16:10 +0000329- Fix a segfault when running test_exceptions with coverage, caused by
330 insufficient checks in accessors of Exception.__context__.
331
Guido van Rossum0ad59d42009-03-30 22:01:35 +0000332- Issue #5604: non-ASCII characters in module name passed to
333 imp.find_module() were converted to UTF-8 while the path is
334 converted to the default filesystem encoding, causing nonsense.
335
Benjamin Peterson09832742009-03-26 17:15:46 +0000336- Issue #5126: str.isprintable() returned False for space characters.
337
Ronald Oussorenfa1fcd12009-03-30 23:16:10 +0000338- Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
339 the end sys.path, for compatibility with the system install of Python.
340
Antoine Pitrou3a652b12009-03-23 18:52:06 +0000341- Issue #4688: Add a heuristic so that tuples and dicts containing only
342 untrackable objects are not tracked by the garbage collector. This can
343 reduce the size of collections and therefore the garbage collection overhead
344 on long-running programs, depending on their particular use of datatypes.
345
Mark Dickinson17e4fdd2009-03-23 18:44:57 +0000346- Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
347 improve its performance. Long divisions and remainder operations
348 are now between 50% and 150% faster.
349
Mark Dickinsonbd792642009-03-18 20:06:12 +0000350- Issue #4258: Make it possible to use base 2**30 instead of base
351 2**15 for the internal representation of integers, for performance
352 reasons. Base 2**30 is enabled by default on 64-bit machines. Add
353 --enable-big-digits option to configure, which overrides the
354 default. Add sys.int_info structseq to provide information about
355 the internal format.
356
Mark Dickinson081dfee2009-03-18 14:47:41 +0000357- Issue #4474: PyUnicode_FromWideChar now converts characters outside
358 the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
359 and sizeof(Py_UNICODE) == 2.
360
Eric Smith8ec90442009-03-14 12:29:34 +0000361- Issue #5237: Allow auto-numbered fields in str.format(). For
362 example: '{} {}'.format(1, 2) == '1 2'.
363
Antoine Pitrou652e7072009-03-13 19:25:20 +0000364- Issue #5392: when a very low recursion limit was set, the interpreter would
365 abort with a fatal error after the recursion limit was hit twice.
366
Matthias Klose042f1332009-04-04 14:32:42 +0000367- Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
368 short file names.
369
Benjamin Petersond1735892009-03-07 18:46:21 +0000370Library
371-------
372
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000373- Issue #2625: added missing items() call to the for loop in
R. David Murray548ac412009-04-02 19:44:43 +0000374 mailbox.MH.get_message().
375
Hye-Shik Chang944820b2009-04-02 10:33:16 +0000376- Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
377 error substitutions from non-strict codec error callbacks in
378 incrementalencoder and StreamWriter.
379
Georg Brandl33c28812009-04-01 23:07:29 +0000380- Issue #5656: Fix the coverage reporting when running the test suite with
381 the -T argument.
382
Raymond Hettinger3f10a952009-04-01 19:05:50 +0000383- Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.
384
Georg Brandl4ed72ac2009-04-01 04:28:33 +0000385- Issue #5624: Fix the _winreg module name still used in several modules.
386
Benjamin Petersona1b49012009-03-31 23:11:32 +0000387- Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.
388
Jesse Nollera9314042009-03-31 22:36:44 +0000389- Issue #5619: Multiprocessing children disobey the debug flag and causes
390 popups on windows buildbots. Patch applied to work around this issue.
391
Jesse Noller32d68c22009-03-31 18:48:42 +0000392- Issue #5400: Added patch for multiprocessing on netbsd compilation/support
393
Hirokazu Yamamoto16caab02009-03-31 13:44:06 +0000394- Issue #5387: Fixed mmap.move crash by integer overflow.
395
Jesse Nollerf8d00852009-03-31 03:25:07 +0000396- Issue #5261: Patch multiprocessing's semaphore.c to support context
397 manager use: "with multiprocessing.Lock()" works now.
398
Brett Cannon7f6b4f82009-03-30 21:30:26 +0000399- Issue #5236: Change time.strptime() to only take strings. Didn't work with
400 bytes already but the failure was non-obvious.
401
Jesse Noller7af4ef82009-03-30 16:47:15 +0000402- Issue #5177: Multiprocessing's SocketListener class now uses
403 socket.SO_REUSEADDR on all connections so that the user no longer needs
404 to wait 120 seconds for the socket to expire.
405
Benjamin Peterson48e24782009-03-29 13:02:52 +0000406- Issue #5595: Fix UnboundedLocalError in ntpath.ismount().
407
Antoine Pitrou66994e12009-03-29 00:45:26 +0000408- Issue #1174606: Calling read() without arguments of an unbounded file
409 (typically /dev/zero under Unix) could crash the interpreter.
410
Benjamin Peterson59406a92009-03-26 17:10:29 +0000411- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
412 io.BufferedRandom have been deprecated for removal in Python 3.2.
413
Lars Gustäbel42e00912009-03-22 20:34:29 +0000414- Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
415 forever on incomplete input. That caused tarfile.open() to hang when used
416 with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
417 partial bzip2 compressed data.
418
Mark Dickinson79f52032009-03-17 23:12:51 +0000419- Issue #2110: Add support for thousands separator and 'n' type
420 specifier to Decimal.__format__
421
Mark Dickinson9c59fe02009-03-17 18:15:08 +0000422- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
423 '>' alignment characters.
424
Antoine Pitrou0ae29cf2009-03-13 22:33:17 +0000425- The error detection code in FileIO.close() could fail to reflect the `errno`
426 value, and report it as -1 instead.
427
Antoine Pitroua28fcfd2009-03-13 23:42:55 +0000428- Issue #5016: FileIO.seekable() could return False if the file position
429 was negative when truncated to a C int. Patch by Victor Stinner.
430
Mark Dickinsonae681df2009-03-21 10:26:31 +0000431Extension Modules
432-----------------
433
Benjamin Petersone099b372009-04-04 17:09:35 +0000434- Issue #5391: mmap now deals exclusively with bytes.
435
Mark Dickinsonae681df2009-03-21 10:26:31 +0000436- Issue #5463: In struct module, remove deprecated overflow wrapping
437 when packing an integer: struct.pack('=L', -1) now raises
Mark Dickinsonb40b9472009-03-29 16:58:21 +0000438 struct.error instead of returning b'\xff\xff\xff\xff'. The
439 _PY_STRUCT_RANGE_CHECKING and _PY_STRUCT_OVERFLOW_MASKING constants
440 have been removed from the struct module.
Mark Dickinsonae681df2009-03-21 10:26:31 +0000441
Benjamin Petersond1735892009-03-07 18:46:21 +0000442
Benjamin Petersona58a6262009-03-07 16:34:40 +0000443What's New in Python 3.1 alpha 1
Barry Warsaw97f005d2008-12-03 16:46:14 +0000444================================
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000445
Benjamin Petersona58a6262009-03-07 16:34:40 +0000446*Release date: 2009-03-07*
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000447
448Core and Builtins
449-----------------
450
Benjamin Peterson4fa88fa2009-03-04 00:14:51 +0000451- The io module has been reimplemented in C for speed.
452
Raymond Hettingerb0d56af2009-03-03 10:52:49 +0000453- Give dict views an informative __repr__.
454
Eric Smith5e5c0db2009-02-20 14:25:03 +0000455- Issue #5247: Improve error message when unknown format codes are
456 used when using str.format() with str, int, and float arguments.
457
Hirokazu Yamamoto575d1332009-02-16 09:13:20 +0000458- Issue #5249: time.strftime returned malformed string when format string
459 contained non ascii character on windows.
460
Benjamin Petersonf5b52242009-03-02 23:31:26 +0000461- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
462 source has already been decoded into str.
463
Antoine Pitrou79eee6b2009-02-13 14:01:05 +0000464- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
465 rotating the object pointer by 4 bits to the right.
466
Mark Dickinson87ec0852009-02-09 17:15:59 +0000467- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
468 it now forces its argument to double before testing for infinity.
469
Benjamin Petersonee1ae7c2009-02-08 21:07:20 +0000470- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
471 returns a non-number type.
472
Benjamin Peterson87618552009-02-08 15:00:52 +0000473- Issue #5182: Removed memoryview.__str__.
474
Mark Dickinsonc008a172009-02-01 13:59:22 +0000475- Issue #1717: Removed builtin cmp() function, dropped tp_compare
476 slot, the C API functions PyObject_Compare and PyUnicode_Compare and
Mark Dickinsone94c6792009-02-02 20:36:42 +0000477 the type definition cmpfunc. The tp_compare slot has been renamed
478 to tp_reserved, and is reserved for future usage.
Mark Dickinsonf02e0aa2009-02-01 12:13:56 +0000479
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000480- Issue #1242657: the __len__() and __length_hint__() calls in several tools
Raymond Hettingere8364232009-02-02 22:55:09 +0000481 were suppressing all exceptions. These include list() and bytearray().
482
Mark Dickinson1124e712009-01-28 21:25:58 +0000483- Issue #4707: round(x, n) now returns an integer if x is an integer.
484 Previously it returned a float.
485
Antoine Pitroub52ec782009-01-25 16:34:23 +0000486- Issue #4753: By enabling a configure option named '--with-computed-gotos'
487 on compilers that support it (notably: gcc, SunPro, icc), the bytecode
488 evaluation loop is compiled with a new dispatch mechanism which gives
489 speedups of up to 20%, depending on the system, on various benchmarks.
490
Antoine Pitrou81fabdb2009-01-22 10:11:36 +0000491- Issue #4874: Most builtin decoders now reject unicode input.
492
Mark Dickinson9ffc0202009-01-20 20:45:53 +0000493- Issue #4842: Don't allow trailing 'L' when constructing an integer
494 from a string.
495
Benjamin Peterson05e782f2009-01-19 15:15:02 +0000496- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.
497
Antoine Pitroue4bc7f62009-01-17 21:06:43 +0000498- Issue #4838: When a module is deallocated, free the memory backing the
499 optional module state data.
500
Mark Dickinson8055afd2009-01-17 10:04:45 +0000501- Issue #4910: Rename nb_long slot to nb_reserved, and change its
502 type to (void *).
503
Antoine Pitrou8d4e5052009-01-13 22:59:11 +0000504- Issue #4935: The overflow checking code in the expandtabs() method common
505 to str, bytes and bytearray could be optimized away by the compiler, letting
506 the interpreter segfault instead of raising an error.
507
Amaury Forgeot d'Arcf343e012009-01-12 23:58:21 +0000508- Issue #3720: Fix a crash when an iterator modifies its class and removes its
509 __next__ method.
510
Mark Dickinsone5e298f2009-01-12 20:49:19 +0000511- Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
512 function no longer attempt to call the __long__ slot to convert an object
513 to an integer. Only the __int__ and __trunc__ slots are examined.
514
Martin v. Löwis7c2b66c2009-01-12 08:21:03 +0000515- Issue #4893: Use NT threading on CE.
516
Martin v. Löwisec59d042009-01-12 07:59:10 +0000517- Issue #4915: Port sysmodule to Windows CE.
518
Antoine Pitrouab868312009-01-10 15:40:25 +0000519- Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
520 common cases are optimized thanks to a dedicated fast path and a moderate
521 amount of loop unrolling.
522
Antoine Pitrou14b78f52009-01-09 22:27:08 +0000523- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
524 collecting the oldest generation) so that allocating lots of objects without
525 destroying them does not show quadratic performance. Based on a proposal by
526 Martin von Löwis at
527 http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
528
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000529- Issue #4604: Some objects of the I/O library could still be used after
Antoine Pitrou8043cf82009-01-09 19:54:29 +0000530 having been closed (for instance, a read() call could return some
531 previously buffered data). Patch by Dmitry Vasiliev.
532
Antoine Pitrou05608432009-01-09 18:53:14 +0000533- Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
534 flag to work properly. Furthermore, when specifying -u, the text stdout
535 and stderr streams have line-by-line buffering enabled (the default being
536 to buffer arbitrary chunks of data).
537
Raymond Hettinger35631532009-01-09 03:58:09 +0000538- The internal table, _PyLong_DigitValue, is now an array of unsigned chars
539 instead of ints (reducing its size from 4 to 8 times thereby reducing
540 Python's overall memory).
541
Antoine Pitroud35cbf62009-01-06 19:02:24 +0000542- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
543 an existing .py counterpart, override the co_filename attributes of all
544 code objects if the original filename is obsolete (which can happen if the
545 file has been renamed, moved, or if it is accessed through different paths).
546 Patch by Ziga Seilnacht and Jean-Paul Calderone.
547
Antoine Pitrouc3b39242009-01-03 16:59:18 +0000548- Issue #4580: Fix slicing of memoryviews when the item size is greater than
549 one byte. Also fixes the meaning of len() so that it returns the number of
550 items, rather than the size in bytes.
551
Martin v. Löwis5c88d812009-01-02 20:47:48 +0000552- Issue #4075: Use OutputDebugStringW in Py_FatalError.
553
Amaury Forgeot d'Arc374e2202009-01-01 23:05:36 +0000554- Issue #4747: When the terminal does not use utf-8, executing a script with
555 non-ascii characters in its name could fail with a "SyntaxError: None" error.
556
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000557- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
Hirokazu Yamamoto8ed9a802009-01-01 16:09:52 +0000558 file with `bytes' filename on Windows.
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000559
Antoine Pitrou7ddda782009-01-01 15:35:33 +0000560- Issue #3680: Reference cycles created through a dict, set or deque iterator
561 did not get collected.
562
Nick Coghlanf1f2f682008-12-30 07:29:12 +0000563- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
564 where the tp_hash and tp_dict slots are both NULL.
565
Georg Brandlccc47b62008-12-28 11:44:14 +0000566- Issue #4759: None is now allowed as the first argument of
567 bytearray.translate(). It was always allowed for bytes.translate().
568
Skip Montanaro80072cb2008-12-23 03:51:14 +0000569- Added test case to ensure attempts to read from a file opened for writing
570 fail.
571
Antoine Pitrou51f3ef92008-12-20 13:14:23 +0000572- Issue #3106: Speedup some comparisons (str/str and int/int).
573
Antoine Pitrouf289ae62008-12-18 11:06:25 +0000574- Issue #2183: Simplify and optimize bytecode for list, dict and set
575 comprehensions. Original patch for list comprehensions by Neal Norwitz.
576
Antoine Pitrou621601a2008-12-17 23:18:19 +0000577- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
578 print elapsed times, not only when some objects are uncollectable /
579 unreachable. Original patch by Neil Schemenauer.
580
Mark Dickinson54bc1ec2008-12-17 16:19:07 +0000581- Issue #3439: Add a bit_length method to int.
582
Mark Dickinsonda2706b2008-12-11 18:03:03 +0000583- Issue #2173: When getting device encoding, check that return value of
584 nl_langinfo is not the empty string. This was causing silent build
585 failures on OS X.
586
Jeffrey Yasskinb9083f32008-12-11 06:18:33 +0000587- Issue #4597: Fixed several opcodes that weren't always propagating
588 exceptions.
589
590- Issue #4589: Fixed exception handling when the __exit__ function of a
Amaury Forgeot d'Arc10b24e82008-12-10 23:49:33 +0000591 context manager returns a value that cannot be converted to a bool.
592
Mark Dickinsonfd24b322008-12-06 15:33:31 +0000593- Issue #4445: Replace "sizeof(PyBytesObject)" with
594 "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
595 bytes instances. On a typical machine this saves 3 bytes of memory
596 (on average) per allocation of a bytes instance.
597
Christian Heimesa872de52008-12-05 08:26:55 +0000598- Issue #4533: File read operation was dreadfully slow due to a slowly
599 growing read buffer. Fixed by using the same growth rate algorithm as
600 Python 2.x.
601
Antoine Pitrou5504e892008-12-06 21:27:53 +0000602- Issue #4509: Various issues surrounding resize of bytearray objects to
603 which there are buffer exports (e.g. memoryview instances).
604
Georg Brandlf9734072008-12-07 15:30:06 +0000605- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
606 method on file objects with closefd=False. The file descriptor is still
607 kept open but the file object behaves like a closed file. The ``FileIO``
608 object also got a new readonly attribute ``closefd``.
Matthias Klose7e1b8fa2008-11-26 17:22:04 +0000609
Antoine Pitroubc420402008-12-07 20:14:49 +0000610- Issue #4569: Interpreter crash when mutating a memoryview with an item size
611 larger than 1.
612
Benjamin Peterson371ccfb2008-12-27 19:03:36 +0000613- Issue #4748: Lambda generators no longer return a value.
614
Gregory P. Smithccc5ae72009-03-02 05:21:55 +0000615- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
616
Walter Dörwaldc1651a02009-05-03 22:55:55 +0000617- Issue #5108: Handle %s like %S, %R and %A in PyUnicode_FromFormatV(): Call
618 PyUnicode_DecodeUTF8() once, remember the result and output it in a second
619 step. This avoids problems with counting UTF-8 bytes that ignores the effect
620 of using the replace error handler in PyUnicode_DecodeUTF8().
621
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000622Library
623-------
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000624
Tarek Ziadé822eb842009-05-19 16:22:57 +0000625- Issue #6062: In distutils, fixed the package option of build_ext. Feedback
626 and tests on pywin32 by Tim Golden.
627
Tarek Ziadé93fb3aa2009-05-18 12:29:06 +0000628- Issue #6053: Fixed distutils tests on win32. patch by Hirokazu Yamamoto.
629
Tarek Ziadéd18a84e2009-05-18 08:07:46 +0000630- Issue #6046: Fixed the library extension when distutils build_ext is used
631 inplace. Initial patch by Roumen Petrov.
632
Tarek Ziadé5af55c62009-05-16 16:52:13 +0000633- Issue #6041: Now distutils `sdist` and `register` commands use `check` as a
634 subcommand.
635
Tarek Ziadé4210c6e2009-05-14 20:20:47 +0000636- Issue #6022: a test file was created in the current working directory by
637 test_get_outputs in Distutils.
638
Tarek Ziadéff0e5002009-05-12 17:14:01 +0000639- Issue #5977: distutils build_ext.get_outputs was not taking into account the
640 inplace option. Initial patch by kxroberto.
641
Tarek Ziadé06fbee12009-05-10 10:34:01 +0000642- Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
643 for old-style extensions.
644
Tarek Ziadébe5b1b92009-05-09 10:09:11 +0000645- Issue #5976: Fixed Distutils test_check_environ.
646
Tarek Ziadé5662d3e2009-05-07 21:24:43 +0000647- Issue #5941: Distutils build_clib command was not working anymore because
648 of an incomplete costumization of the archiver command. Added ARFLAGS in the
649 Makefile besides AR and make Distutils use it. Original patch by David
650 Cournapeau.
651
R. David Murrayb507d2e2009-04-29 15:34:32 +0000652- Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.
653
Tarek Ziadé81623822009-04-29 08:07:44 +0000654- Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
655 anymore.
656
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000657- Issue #5810: Fixed Distutils test_build_scripts so it uses
Tarek Ziadé939f9c82009-04-25 12:53:56 +0000658 sysconfig.get_config_vars.
659
Tarek Ziadé23336082009-04-25 12:39:56 +0000660- Issue #4951: Fixed failure in test_httpservers.
661
Thomas Hellerd3cfe992009-04-24 20:10:24 +0000662- Issue #5795: Fixed test_distutils failure on Debian ppc.
663
Tarek Ziadé822e1d42009-04-13 12:37:57 +0000664- Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.
665
Georg Brandl1f9fa312009-04-27 16:42:58 +0000666- Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
667 a value in SafeConfigParser.
668
Tarek Ziadéf396ecf2009-04-11 15:00:43 +0000669- Issue #5732: added a new command in Distutils: check.
670
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000671- Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
Tarek Ziadéa6191802009-04-09 22:02:39 +0000672 platforms. Initial patch by Paul Moore.
673
Tarek Ziadéf6370502009-04-05 22:57:21 +0000674- Issue #5095: Added bdist_msi to the list of bdist supported formats.
675 Initial fix by Steven Bethard.
676
Tarek Ziadé889b0aa2009-04-05 21:49:36 +0000677- Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
678 Initial fix by Wayne Davison.
679
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000680- Issue #5694: removed spurious test output in Distutils (test_clean).
Tarek Ziadéea261632009-04-05 18:33:34 +0000681
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000682- Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
Georg Brandl236f7972009-04-05 14:28:42 +0000683
Brett Cannonf47e84c2009-04-01 16:06:01 +0000684- Issue #1665206 (partially): Move imports in cgitb to the top of the module
685 instead of performing them in functions. Helps prevent import deadlocking in
686 threads.
687
R. David Murraye59482e2009-04-01 03:42:00 +0000688- Issue #2522: locale.format now checks its first argument to ensure it has
689 been passed only one pattern, avoiding mysterious errors where it appeared
690 that it was failing to do localization.
691
Tarek Ziadéb2e36f12009-03-31 22:37:55 +0000692- Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
693 Brandl.
694
Antoine Pitrou350370c2009-03-14 00:13:13 +0000695- Issue #1222: locale.format() bug when the thousands separator is a space
696 character.
697
Tarek Ziadé516db942009-03-11 12:52:00 +0000698- Issue #5472: Fixed distutils.test_util tear down. Original patch by
699 Tim Golden.
700
Raymond Hettinger5bb0f0e2009-03-10 12:56:32 +0000701- collections.deque() objects now have a read-only attribute called maxlen.
702
Guilherme Polof45b4cc2009-03-07 02:19:14 +0000703- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
704 it is has been populated and properly configured in order to prevent
705 window flashing.
706
Guilherme Polo56f5be52009-03-07 01:54:57 +0000707- Issue #4792: Prevent a segfault in _tkinter by using the
708 guaranteed to be safe interp argument given to the PythonCmd in place of
709 the Tcl interpreter taken from a PythonCmd_ClientData.
710
711- Issue #5193: Guarantee that tkinter.Text.search returns a string.
712
Tarek Ziadé63b64c02009-03-07 00:51:53 +0000713- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
714 Original patch by Akira Kitada.
715
Hirokazu Yamamoto54d0df62009-03-06 03:04:07 +0000716- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.
717
Hirokazu Yamamoto8e722bc2009-03-05 14:33:01 +0000718- Issue #5385: Fixed mmap crash after resize failure on windows.
719
Hirokazu Yamamoto0c988172009-03-03 22:41:26 +0000720- Issue #5179: Fixed subprocess handle leak on failure on windows.
721
Raymond Hettinger2d32f632009-03-02 21:24:57 +0000722- PEP 372: Added collections.OrderedDict().
723
Raymond Hettingera4f52b12009-03-02 22:28:31 +0000724- The _asdict() for method for namedtuples now returns an OrderedDict().
725
Raymond Hettinger0663a1e2009-03-02 23:06:00 +0000726- configparser now defaults to using an ordered dictionary.
727
Benjamin Petersone0124bd2009-03-09 21:04:33 +0000728- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
729 import guess_extension`` was used.
730
Hirokazu Yamamoto10c99372009-02-28 12:21:53 +0000731- Issue #1733986: Fixed mmap crash in accessing elements of second map object
732 with same tagname but larger size than first map. (Windows)
733
Hirokazu Yamamoto39c6dea2009-02-28 10:56:50 +0000734- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
735 overrun.
736
Tarek Ziadéf0721222009-02-28 10:16:43 +0000737- Issue #1533164: Installed but not listed *.pyo was breaking Distutils
738 bdist_rpm command.
739
740- Issue #5378: added --quiet option to Distutils bdist_rpm command.
741
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000742- Issue #5052: make Distutils compatible with 2.3 again.
743
Tarek Ziadé0f31e6d2009-02-25 22:31:38 +0000744- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
745 in Distutils tests.
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000746
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000747- Issue #5287: Add exception handling around findCaller() call to help out
748 IronPython.
749
Hirokazu Yamamoto0654ccd2009-02-18 16:38:00 +0000750- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
751 The file was resized to wrong size.
752
753- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
754
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000755- Issue #2279: distutils.sdist.add_defaults now add files
Tarek Ziadé0d0506e2009-02-16 21:49:12 +0000756 from the package_data and the data_files metadata.
757
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000758- Issue #5257: refactored all tests in distutils, so they use
Tarek Ziadéc1375d52009-02-14 14:35:51 +0000759 support.TempdirManager, to avoid writing in the tests directory.
760
Tarek Ziadé68c50952009-02-13 23:04:17 +0000761- Issue #4524: distutils build_script command failed with --with-suffix=3.
762 Initial patch by Amaury Forgeot d'Arc.
763
Tarek Ziadé811d6242009-02-13 22:26:15 +0000764- Issue #2461: added tests for distutils.util
765
Mark Dickinsonc28ad272009-02-12 17:58:36 +0000766- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
767 which inherited from numbers.py which did not have __slots__ defined. The
768 numbers hierarchy now has its own __slots__ declarations.
769
Antoine Pitroub353c122009-02-11 00:39:14 +0000770- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
771 encoding.
772
Thomas Heller465c8022009-02-10 18:59:04 +0000773- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
774 function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
775
Tarek Ziadé7d5e9872009-02-10 12:36:33 +0000776- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
777 under NT and OS2. Patch by Philip Jenvey.
778
Brett Cannonbefb14f2009-02-10 02:10:16 +0000779- Issue #5128: Make compileall properly inspect bytecode to determine if needs
780 to be recreated. This avoids a timing hole thanks to the old reliance on the
781 ctime of the files involved.
782
Guilherme Polob681df42009-02-09 22:33:59 +0000783- Issue #5122: Synchronize tk load failure check to prevent a potential
784 deadlock.
785
Benjamin Petersona86f2c02009-02-10 02:41:10 +0000786- Issue #1818: collections.namedtuple() now supports a keyword argument
787 'rename' which lets invalid fieldnames be automatically converted to
788 positional names in the form, _1, _2, ...
789
Guilherme Poloae098992009-02-09 16:44:24 +0000790- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
791
Nick Coghlan9a1d6e32009-02-08 03:37:27 +0000792- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
793 public documented method ``ZipImporter.get_filename()``.
794
Nick Coghlan3f48ae32009-02-08 01:58:26 +0000795- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
796 the execution of packages by looking for and executing a ``__main__``
797 submodule when a package name is supplied. Initial patch by Andi
798 Vajda.
799
Guilherme Polo491aee22009-02-06 23:16:11 +0000800- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
801 not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
802 Tkapp_Call when calling from a thread different than the one that created
803 the Tcl interpreter. Patch by Robert Hancock.
804
Eric Smith0e5b5622009-02-06 01:32:42 +0000805- Issue #4285: Change sys.version_info to be a named tuple. Patch by
806 Ross Light.
807
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000808- Issue #1520877: Now distutils.sysconfig reads $AR from the
Tarek Ziadéd3409de2009-02-06 01:18:36 +0000809 environment/Makefile. Patch by Douglas Greiman.
810
Tarek Ziadé70a74eb2009-02-06 00:38:35 +0000811- Issue #1276768: The verbose option was not used in the code of
812 distutils.file_util and distutils.dir_util.
813
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000814- Issue #5132: Fixed trouble building extensions under Solaris with
Tarek Ziadé5874ef12009-02-05 22:56:14 +0000815 --enabled-shared activated. Initial patch by Dave Peterson.
816
Guilherme Polo7f423952009-02-02 21:17:09 +0000817- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
818
Raymond Hettinger85602262009-02-03 04:19:10 +0000819- The shelve module now defaults to pickle protocol 3.
820
Brett Cannone61426e2009-01-30 01:31:34 +0000821- Fix a bug in the trace module where a bytes object from co_lnotab had its
822 items being passed through ord().
823
Antoine Pitrou0dcc3cd2009-01-29 20:26:59 +0000824- Issue #2047: shutil.move() could believe that its destination path was
825 inside its source path if it began with the same letters (e.g. "src" vs.
826 "src.new").
827
Guilherme Polo5f238482009-01-28 14:41:10 +0000828- Added the ttk module. See issue #2983: Ttk support for Tkinter.
829
Raymond Hettinger89e12962009-01-26 02:09:03 +0000830- Removed isSequenceType(), isMappingType, and isNumberType() from the
831 operator module; use the abstract base classes instead. Also removed
832 the repeat() function; use mul() instead.
833
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000834- Issue #5021: doctest.testfile() did not create __name__ and
Raymond Hettinger0f055172009-01-27 10:06:09 +0000835 collections.namedtuple() relied on __name__ being defined.
836
837- Backport importlib from Python 3.1. Only the import_module() function has
838 been backported to help facilitate transitions from 2.7 to 3.1.
839
Tarek Ziadé0302cf52009-01-26 17:23:20 +0000840- Issue #1885: distutils. When running sdist with --formats=tar,gztar
841 the tar file was overriden by the gztar one.
842
Tarek Ziadé4d4456f2009-01-25 18:27:45 +0000843- Issue #4863: distutils.mwerkscompiler has been removed.
844
Raymond Hettingerd07d9392009-01-27 04:20:44 +0000845- Added a new itertools functions: combinations_with_replacement()
846 and compress().
Raymond Hettinger6b3b0fc2009-01-26 02:56:58 +0000847
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000848- Issue #5032: added a step argument to itertools.count() and
Raymond Hettinger30729212009-02-12 06:28:27 +0000849 allowed non-integer arguments.
850
Jesse Noller41faa542009-01-25 03:45:53 +0000851- Fix and properly document the multiprocessing module's logging
852 support, expose the internal levels and provide proper usage
853 examples.
854
Mark Dickinsoncddcf442009-01-24 21:46:33 +0000855- Issue #1672332: fix unpickling of subnormal floats, which was
856 producing a ValueError on some platforms.
857
Martin v. Löwisacbf4612009-01-24 16:19:45 +0000858- Issue #3881: Help Tcl to load even when started through the
859 unreadable local symlink to "Program Files" on Vista.
860
Martin v. Löwis59e47792009-01-24 14:10:07 +0000861- Issue #4710: Extract directories properly in the zipfile module;
862 allow adding directories to a zipfile.
863
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000864- Issue #3807: _multiprocessing build fails when configure is passed
Jesse Noller6fd47e22009-01-23 14:09:08 +0000865 --without-threads argument. When this occurs, _multiprocessing will
866 be disabled, and not compiled.
867
Antoine Pitrou08838b62009-01-21 00:55:13 +0000868- Issue #5008: When a file is opened in append mode with the new IO library,
869 do an explicit seek to the end of file (so that e.g. tell() returns the
870 file size rather than 0). This is consistent with the behaviour of the
871 traditional 2.x file object.
872
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000873- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
874 parameter was set.
875
Mark Dickinson8dd05142009-01-20 20:43:58 +0000876- Issue #4842: Always append a trailing 'L' when pickling longs using
877 pickle protocol 0. When reading, the 'L' is optional.
878
Brett Cannonafccd632009-01-20 02:21:27 +0000879- Add the importlib package.
880
Jesse Noller9a0fc972009-01-18 21:12:58 +0000881- Issue #4301: Patch the logging module to add processName support, remove
882 _check_logger_class from multiprocessing.
883
Jesse Noller1cbb17a2009-01-18 19:45:18 +0000884- Issue #3325: Remove python2.x try: except: imports for old cPickle from
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000885 multiprocessing.
Jesse Nollerf70a5382009-01-18 19:44:02 +0000886
Benjamin Peterson9953a8d2009-01-17 04:15:01 +0000887- Issue #4959: inspect.formatargspec now works for keyword only arguments
888 without defaults.
889
Jesse Noller6214edd2009-01-19 16:23:53 +0000890- Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
891 for *nix machines for negative handles and large int handles. Without this check
892 it is possible to segfault the interpreter.
893
Jesse Nollerb0516a62009-01-18 03:11:38 +0000894- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
895 in sharedctypes.py.
896
897- Issue #1225107: inspect.isclass() returned True for instances with a custom
898 __getattr__.
899
Gregory P. Smithde3369f2009-01-12 04:50:11 +0000900- Issue #3826 and #4791: The socket module now closes the underlying socket
901 appropriately when it is being used via socket.makefile() objects
902 rather than delaying the close by waiting for garbage collection to do it.
903
Raymond Hettingerb8baf632009-01-14 02:20:07 +0000904- Issue #1696199: Add collections.Counter() for rapid and convenient
905 counting.
906
Antoine Pitrou308705e2009-01-10 16:22:51 +0000907- Issue #3860: GzipFile and BZ2File now support the context manager protocol.
908
Thomas Heller5e4e4272009-01-08 09:34:20 +0000909- Issue #4867: Fixed a crash in ctypes when passing a string to a
910 function without defining argtypes.
911
Antoine Pitrou42db3ef2009-01-04 21:37:59 +0000912- Issue #4272: Add an optional argument to the GzipFile constructor to override
913 the timestamp in the gzip stream. The default value remains the current time.
914 The information can be used by e.g. gunzip when decompressing. Patch by
915 Jacques Frechet.
916
Mark Dickinson315a20a2009-01-04 21:34:18 +0000917- Restore Python 2.3 compatibility for decimal.py.
918
Guilherme Polo3f5f8222009-01-03 22:00:39 +0000919- Issue #3638: Remove functions from _tkinter module level that depend on
920 TkappObject to work with multiple threads.
921
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000922- Issue #4718: Adapt the wsgiref package so that it actually works with
923 Python 3.x, in accordance with the `official amendments of the spec
Antoine Pitrou38a66ad2009-01-03 18:41:49 +0000924 <http://www.wsgi.org/wsgi/Amendments_1.0>`_.
925
Raymond Hettinger771ed762009-01-03 19:20:32 +0000926- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
927 to the decimal module.
928
Georg Brandl3a9b0622009-01-03 22:07:57 +0000929- Fractions.from_float() no longer loses precision for integers too big to
930 cast as floats.
931
Mark Dickinsonf9236412009-01-02 23:23:21 +0000932- Issue #4812: add missing underscore prefix to some internal-use-only
933 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
934
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000935- Issue #4790: The nsmallest() and nlargest() functions in the heapq module
Georg Brandl3a9b0622009-01-03 22:07:57 +0000936 did unnecessary work in the common case where no key function was specified.
937
Georg Brandlb1441c72009-01-03 22:33:39 +0000938- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
939 the function is not a generator.
940
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000941- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
942 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
Tarek Ziadé9df8ce32008-12-30 23:09:20 +0000943
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000944- Issue #4646: distutils was choking on empty options arg in the setup
Tarek Ziadé4450dcf2008-12-29 22:38:38 +0000945 function. Original patch by Thomas Heller.
946
Martin v. Löwis1f1620e2008-12-29 16:27:13 +0000947- Issue #3767: Convert Tk object to string in tkColorChooser.
948
Martin v. Löwise354d782008-12-29 16:03:04 +0000949- Issue #3248: Allow placing ScrolledText in a PanedWindow.
950
Antoine Pitrou5acd41e2008-12-28 14:29:00 +0000951- Issue #4444: Allow assertRaises() to be used as a context handler, so that
952 the code under test can be written inline if more practical.
953
Georg Brandldb7b6b92009-01-01 15:53:14 +0000954- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
955 works as expected in the interactive environment.
956
Antoine Pitroudb5fe662008-12-27 15:50:40 +0000957- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
958 Gabriel Genellina.
959
Antoine Pitrou180a3362008-12-14 16:36:46 +0000960- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
961 boundary.
962
Nick Coghlanf088e5e2008-12-14 11:50:48 +0000963- Issue #4223: inspect.getsource() will now correctly display source code
964 for packages loaded via zipimport (or any other conformant PEP 302
965 loader). Original patch by Alexander Belopolsky.
966
967- Issue #4201: pdb can now access and display source code loaded via
968 zipimport (or any other conformant PEP 302 loader). Original patch by
969 Alexander Belopolsky.
970
971- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
972 302 conformant loader) will now work correctly in most cases (they
973 are still subject to the constraints that exist for all code running
974 from inside a module loaded via a PEP 302 loader and attempting to
975 perform IO operations based on __file__). Original patch by
976 Alexander Belopolsky.
977
978- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
979 allows backporting to maintenance branches. Original patch by
980 Alexander Belopolsky.
981
Antoine Pitrou7c59bc62008-12-13 23:20:54 +0000982- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
983 a non-ASCII letter.
984
Lars Gustäbel43fcf3a2008-12-12 14:58:38 +0000985- Issue #4616: TarFile.utime(): Restore directory times on Windows.
986
Benjamin Peterson433f32c2008-12-12 01:25:05 +0000987- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
988 codec cannot be found. This is for compatibility with the builtin behavior.
989
Facundo Batista708d5812008-12-11 04:20:07 +0000990- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
991 give correct results in the case where one argument is a quiet NaN
992 and the other is a finite number that requires rounding.
993
Skip Montanaroc1ce2862008-12-06 17:25:02 +0000994- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
995 libs.
996
Georg Brandlf9734072008-12-07 15:30:06 +0000997- Added the subprocess.check_call_output() convenience function to get output
998 from a subprocess on success or raise an exception on error.
999
1000- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
1001 support unusual filenames (such as those containing semi-colons) in
1002 Content-Disposition headers.
1003
1004- Issue #4384: Added logging integration with warnings module using
1005 captureWarnings(). This change includes a NullHandler which does nothing;
1006 it will be of use to library developers who want to avoid the "No handlers
1007 could be found for logger XXX" message which can appear if the library user
1008 doesn't configure logging.
1009
1010- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
1011 exception.
1012
Georg Brandleee31162008-12-07 15:15:22 +00001013- Issue #4529: fix the parser module's validation of try-except-finally
1014 statements.
1015
1016- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
1017 not a malformed option.
1018
1019- Added the subprocess.check_output() convenience function to get output
1020 from a subprocess on success or raise an exception on error.
1021
Amaury Forgeot d'Arcbc9d4742008-12-05 01:40:43 +00001022- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
1023 the corresponding tests now pass.
1024
Amaury Forgeot d'Arcbc2ce572008-12-05 01:02:21 +00001025- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
1026 it was calling the wrong open() function.
1027
Fred Drake9a0a65b2008-12-04 19:24:50 +00001028- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
1029 support unusual filenames (such as those containing semi-colons) in
1030 Content-Disposition headers.
1031
Matthias Klose2c7e3ee2009-01-10 17:08:25 +00001032- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
1033 biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
1034
Benjamin Peterson5c6d7872009-02-06 02:40:07 +00001035- Issue #5104: The socket module now raises OverflowError when 16-bit port and
1036 protocol numbers are supplied outside the allowed 0-65536 range on bind()
1037 and getservbyport().
1038
Jeroen Ruigrok van der Werven0a866942009-05-08 14:18:00 +00001039- Windows locale mapping updated to Vista.
1040
Antoine Pitrou2a013ea2008-12-27 20:39:28 +00001041Tools/Demos
1042-----------
1043
Antoine Pitrou8a681222009-02-07 17:13:31 +00001044- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
1045 and make it 2.6-compatible.
1046
Guilherme Poloa7d27972009-01-28 16:06:51 +00001047- Ttk demos added in Demo/tkinter/ttk/
1048
Antoine Pitrou2a013ea2008-12-27 20:39:28 +00001049- Issue #4677: add two list comprehension tests to pybench.
1050
Georg Brandlb1441c72009-01-03 22:33:39 +00001051
1052Build
1053-----
1054
Martin v. Löwis8482ef92009-05-05 16:14:30 +00001055- Issue #5847: Remove -n switch on "Edit with IDLE" menu item.
1056
Antoine Pitrou8966c992009-05-01 21:18:27 +00001057- Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
1058 linker, rather than always exit successfully. Patch by Floris Bruynooghe.
1059
Matthias Klose55708cc2009-04-30 08:06:49 +00001060- Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
1061 the order that backends for the dbm extension are checked.
1062
Matthias Klose906785c2009-02-22 23:18:38 +00001063- Link the shared python library with $(MODLIBS).
1064
Martin v. Löwis11f72102009-02-10 13:13:30 +00001065- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
1066
Martin v. Löwisbc186a82009-02-02 15:32:22 +00001067- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
1068
Martin v. Löwise97637d2009-01-11 09:45:11 +00001069- Issue #4895: Use _strdup on Windows CE.
1070
Georg Brandlb1441c72009-01-03 22:33:39 +00001071- Issue #4472: "configure --enable-shared" now works on OSX
1072
1073- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
1074
1075- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
1076
1077- Issue #4289: Remove Cancel button from AdvancedDlg.
1078
1079- Issue #1656675: Register a drop handler for .py* files on Windows.
1080
1081- Issue #4120: Exclude manifest from extension modules in VS2008.
1082
1083- Issue #4091: Install pythonxy.dll in system32 again.
1084
1085- Issue #4018: Disable "for me" installations on Vista.
1086
1087- Issue #3758: Add ``patchcheck`` build target to .PHONY.
1088
1089- Issue #4204: Fixed module build errors on FreeBSD 4.
1090
1091
1092C-API
1093-----
1094
Mark Dickinson21776072009-02-10 16:13:25 +00001095- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
1096 for negative arguments. Previously, it raised TypeError.
1097
Georg Brandlb1441c72009-01-03 22:33:39 +00001098- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
1099
1100- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
1101 the GIL is released, or owned by another thread.
1102
1103- Issue #4122: On Windows, fix a compilation error when using the
1104 Py_UNICODE_ISSPACE macro in an extension module.
1105
1106
Mark Dickinsone675f082008-12-11 21:56:00 +00001107Extension Modules
1108-----------------
1109
Gregory P. Smith365a1862009-02-12 07:35:29 +00001110- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
1111 supporting objects as input no matter how it was compiled (built in
1112 implementations or external openssl library).
1113
Mark Dickinson29500f62009-01-15 15:36:10 +00001114- Issue #4397: Fix occasional test_socket failure on OS X.
1115
Martin v. Löwisa9b54c72009-01-11 09:30:50 +00001116- Issue #4279: Fix build of parsermodule under Cygwin.
1117
Antoine Pitroubcd5cbe2009-01-08 21:17:16 +00001118- Issue #4751: hashlib now releases the GIL when hashing large buffers
1119 (with a hardwired threshold of 2048 bytes), allowing better parallelization
1120 on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.
1121
Martin v. Löwis5c88d812009-01-02 20:47:48 +00001122- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
1123
Antoine Pitrou31f30b12009-01-02 17:34:35 +00001124- Issue #4738: Each zlib object now has a separate lock, allowing to compress
1125 or decompress several streams at once on multi-CPU systems. Also, the GIL
1126 is now released when computing the CRC of a large buffer. Patch by ebfe.
1127
Georg Brandlb1441c72009-01-03 22:33:39 +00001128- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
1129
Martin v. Löwis05bfe1f2008-12-29 18:21:47 +00001130- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
1131
Mark Dickinsone675f082008-12-11 21:56:00 +00001132- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
1133 OpenBSD.
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +00001134
Antoine Pitrou3ad3a0d2008-12-18 17:08:32 +00001135- Issue #4583: array.array would not always prohibit resizing when a buffer
1136 has been exported, resulting in an interpreter crash when accessing the
1137 buffer.
1138
Martin v. Löwis841edad2008-11-30 10:36:49 +00001139
Jack Diederiche0cbd692009-04-01 04:27:09 +00001140- Issue #5228: Make functools.partial objects can now be pickled.
1141
Guilherme Polo9de29af2009-01-28 20:40:48 +00001142Tests
1143-----
1144
R. David Murraya21e4ca2009-03-31 23:16:50 +00001145- regrtest no longer treats ImportError as equivalent to SkipTest. Imports
Vinay Sajipad5fa2f2009-04-27 13:55:05 +00001146 that should cause a test to be skipped are now done using import_module
R. David Murraya21e4ca2009-03-31 23:16:50 +00001147 from test support, which does the conversion.
1148
Guilherme Polo9de29af2009-01-28 20:40:48 +00001149- Issue #5083: New 'gui' resource for regrtest.
1150
1151
Brett Cannon7317c1e2008-11-25 19:19:17 +00001152Docs
1153----
1154
Georg Brandl52b92cc2008-05-25 09:43:03 +00001155
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001156**(For information about older versions, consult the HISTORY file.)**