blob: 6d5769376883eefa3d81be6d4698db84f4b0ca78 [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
Eric Smith41669ca2009-05-23 14:23:22 +000015- Issue #6089: Fixed str.format with certain invalid field specifiers
16 that would raise SystemError.
17
Mark Dickinson6b1e43b2009-05-20 18:41:04 +000018- Issue #5829: complex("1e500") no longer raises OverflowError. This
19 makes it consistent with float("1e500") and interpretation of real
20 and imaginary literals.
21
Hirokazu Yamamoto8223c242009-05-17 04:21:53 +000022- Issue #3527: Removed Py_WIN_WIDE_FILENAMES which is not used any more.
23
R. David Murraydd226ea2009-05-13 12:27:21 +000024- Issue #5994: the marshal module now has docstrings.
25
Mark Dickinsond1ec8b22009-05-11 15:45:15 +000026- Issue #5981: Fix three minor inf/nan issues in float.fromhex:
27 (1) inf and nan strings with trailing whitespace were incorrectly
28 rejected; (2) parsing of strings representing infinities and nans
29 was locale aware; and (3) the interpretation of fromhex('-nan')
30 didn't match that of float('-nan').
31
Benjamin Petersonaccdca52009-05-06 23:26:59 +000032Library
33-------
34
Antoine Pitrouc3ee1662009-05-23 16:02:33 +000035- Issue #1983: Fix functions taking or returning a process identifier to use
36 the dedicated C type ``pid_t`` instead of a C ``int``. Some platforms have
37 a process identifier type wider than the standard C integer type.
38
R. David Murray87e20742009-05-23 01:30:26 +000039- Issue #4066: smtplib.SMTP_SSL._get_socket now correctly returns the socket.
40 Patch by Farhan Ahmad, test by Marcin Bachry.
41
Antoine Pitrou6e610062009-05-15 17:04:50 +000042- Issue #2116: Weak references and weak dictionaries now support copy()ing and
43 deepcopy()ing.
44
Antoine Pitrouc1d09362009-05-15 12:15:51 +000045- Issue #1655: Make imaplib IPv6-capable. Patch by Derek Morr.
46
Antoine Pitrou37d1c182009-05-14 21:54:00 +000047- Issue #5918: Fix a crash in the parser module.
48
Antoine Pitrou2ca24f02009-05-14 21:30:46 +000049- Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.
50
Antoine Pitroue4501852009-05-14 18:55:55 +000051- Issue #5006: Better handling of unicode byte-order marks (BOM) in the io
52 library. This means, for example, that opening an UTF-16 text file in
53 append mode doesn't add a BOM at the end of the file if the file isn't
54 empty.
55
R. David Murray74b89242009-05-13 17:33:03 +000056- Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
57 file is a binary. Patch by Brodie Rao, tests by Daniel Diniz. This fix
58 corrects a pydoc regression.
59
R. David Murray99352742009-05-07 18:24:38 +000060- Issue 5955: aifc's close method did not close the file it wrapped,
61 now it does. This also means getfp method now returns the real fp.
62
Benjamin Petersonaccdca52009-05-06 23:26:59 +000063
Martin v. Löwisdb1c3992009-05-23 10:38:26 +000064Extension Modules
65-----------------
66
67- Issue #6093: Fix off-by-one error in locale.strxfrm.
68
Brett Cannon1262e7c2009-05-11 01:47:11 +000069Tests
70-----
71
72- Issue 5442: Tests for importlib were not properly skipping case-sensitivity
73 tests on darwin even when the OS was installed on a case-sensitive
74 filesystem. Also fixed tests that should not be run when
75 sys.dont_write_bytecode is true.
76
77
Benjamin Petersonbd35b032009-04-04 23:16:41 +000078What's New in Python 3.1 beta 1?
79================================
80
Benjamin Peterson5c5f3de2009-05-06 20:43:28 +000081*Release date: 2009-05-06*
Benjamin Petersonbd35b032009-04-04 23:16:41 +000082
83Core and Builtins
84-----------------
85
Mark Dickinson865e01a2009-05-07 16:37:01 +000086- Issue #5914: Add new C API function PyOS_string_to_double, and
87 deprecate PyOS_ascii_strtod and PyOS_ascii_atof.
88
Eric Smith741191f2009-05-06 13:08:15 +000089- Issue #3382: float.__format__, complex.__format__, and %-formatting
90 no longer map 'F' to 'f'. Because of issue #5859 (below), this only
91 affects nan -> NAN and inf -> INF.
92
Mark Hammond5a607a32009-05-06 08:04:54 +000093- Issue #5799: ntpath (ie, os.path on Windows) fully supports UNC pathnames
94 in all operations, including splitdrive, split, etc. splitunc() now issues
95 a PendingDeprecation warning.
96
Eric Smith63376222009-05-05 14:04:18 +000097- Issue #5920: For float.__format__, change the behavior with the
98 empty presentation type (that is, not one of 'e', 'f', 'g', or 'n')
99 to be like 'g' but with at least one decimal point and with a
100 default precision of 12. Previously, the behavior the same but with
101 a default precision of 6. This more closely matches str(), and
102 reduces surprises when adding alignment flags to the empty
103 presentation type. This also affects the new complex.__format__ in
104 the same way.
105
Martin v. Löwis011e8422009-05-05 04:43:17 +0000106- Implement PEP 383, Non-decodable Bytes in System Character Interfaces.
107
R. David Murrayb18500d2009-05-04 22:59:07 +0000108- Issue #5890: in subclasses of 'property' the __doc__ attribute was
109 shadowed by classtype's, even if it was None. property now
110 inserts the __doc__ into the subclass instance __dict__.
111
Antoine Pitrou244651a2009-05-04 18:56:13 +0000112- Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
113 sequences. Patch by Nick Barnes and Victor Stinner.
114
Martin v. Löwise0a2b722009-05-10 08:08:56 +0000115- Issue #3672: Reject surrogates in utf-8 codec; add surrogatepass error handler.
Martin v. Löwisdb12d452009-05-02 18:52:14 +0000116
Benjamin Petersond2e0c792009-05-01 20:40:59 +0000117- Issue #5883: In the io module, the BufferedIOBase and TextIOBase ABCs have
118 received a new method, detach(). detach() disconnects the underlying stream
119 from the buffer or text IO and returns it.
120
Mark Dickinson33841c32009-05-01 15:37:04 +0000121- Issue #5859: Remove switch from '%f' to '%g'-style formatting for
122 floats with absolute value over 1e50. Also remove length
123 restrictions for float formatting: '%.67f' % 12.34 and '%.120e' %
124 12.34 no longer raise an exception.
Mark Dickinsonf489caf2009-05-01 11:42:00 +0000125
Eric Smith741191f2009-05-06 13:08:15 +0000126- Issue #1588: Add complex.__format__. For example,
Eric Smith58a42242009-04-30 01:00:33 +0000127 format(complex(1, 2./3), '.5') now produces a sensible result.
128
Mark Dickinsond3ca5572009-04-29 18:47:07 +0000129- Issue #5864: Fix empty format code formatting for floats so that it
130 never gives more than the requested number of significant digits.
131
Eric Smith6dc46f52009-04-27 20:39:49 +0000132- Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
133 new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.
134
Eric Smithcc32a112009-04-26 21:35:14 +0000135- Issue #5835: Deprecate PyOS_ascii_formatd.
136
Martin v. Löwis71efeb72009-04-26 01:02:07 +0000137- Issue #4971: Fix titlecase for characters that are their own
138 titlecase, but not their own uppercase.
139
Benjamin Peterson193152c2009-04-25 01:08:45 +0000140- Issue #5283: Setting __class__ in __del__ caused a segfault.
141
Mark Dickinsonad476da2009-04-23 19:14:16 +0000142- Issue #5816: complex(repr(z)) now recovers z exactly, even when
143 z involves nans, infs or negative zeros.
144
Mark Dickinson4a16e3a2009-04-23 19:15:48 +0000145- Issue #3166: Make int -> float conversions correctly rounded.
Mark Dickinsonc6300392009-04-20 21:38:00 +0000146
Mark Dickinsone6a076d2009-04-18 11:48:33 +0000147- Issue #1869 (and many duplicates): make round(x, n) correctly
148 rounded for a float x, by using the decimal <-> binary conversions
149 from Python/dtoa.c. As a consequence, (e.g.) round(x, 2) now
150 consistently agrees with format(x, '.2f').
151
Benjamin Petersonae937c02009-04-18 20:54:08 +0000152- Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
153 some builtin types.
154
Eric Smith0923d1d2009-04-16 20:16:10 +0000155- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'.
156
Eric Smith35e84722009-04-16 20:21:28 +0000157- Issue #5515: str.format() type 'n' combined with commas and leading
158 zeros no longer gives odd results with ints and floats.
Eric Smith0923d1d2009-04-16 20:16:10 +0000159
160- Implement PEP 378, Format Specifier for Thousands Separator, for
161 floats.
162
Mark Dickinson3370cce2009-04-17 22:40:53 +0000163- The str function switches to exponential notation at
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000164 1e11, not 1e12. This avoids printing 13 significant digits in
165 situations where only 12 of them are correct. Example problem
166 value: str(1e11 + 0.5). (This minor issue has existed in 2.x for a
167 long time.)
168
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000169- Issue #1580: On most platforms, use a 'short' float repr: for a
170 finite float x, repr(x) now outputs a string based on the shortest
171 sequence of decimal digits that rounds to x. Previous behaviour was
172 to output 17 significant digits and then strip trailing zeros.
Mark Dickinson3370cce2009-04-17 22:40:53 +0000173 Another minor difference is that the new repr switches to
174 exponential notation at 1e16 instead of the previous 1e17; this
175 avoids misleading output in some cases.
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000176
177 There's a new sys attribute sys.float_repr_style, which takes
178 the value 'short' to indicate that we're using short float repr,
179 and 'legacy' if the short float repr isn't available for one
180 reason or another.
181
182 The float repr change involves incorporating David Gay's 'perfect
183 rounding' code into the Python core (it's in Python/dtoa.c). As a
184 secondary consequence, all string-to-float and float-to-string
185 conversions (including all float formatting operations) will be
186 correctly rounded on these platforms.
187
188 See issue 1580 discussions for details of platforms for which
189 this change does not apply.
190
Benjamin Peterson2808d3c2009-04-15 21:34:27 +0000191- Issue #5759: float() didn't call __float__ on str subclasses.
192
Georg Brandlabc38772009-04-12 15:51:51 +0000193- The string.maketrans() function is deprecated; there is a new static method
194 maketrans() on the bytes and bytearray classes. This removes confusion about
195 the types string.maketrans() is supposed to work with, and mirrors the
196 methods available on the str class.
197
R. David Murraydc6da8a2009-04-09 22:16:43 +0000198- Issue #2170: refactored xml.dom.minidom.normalize, increasing both
199 its clarity and its speed.
200
Matthias Klose091c7b12009-04-07 13:24:27 +0000201- Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
202 to avoid compiler warnings.
203
Walter Dörwald8dc33d52009-05-06 14:41:26 +0000204- Issue #3739: The unicode-internal encoder now reports the number of characters
205 consumed like any other encoder (instead of the number of bytes).
206
Benjamin Peterson0b4915e2009-04-25 21:11:45 +0000207Installation
208------------
209
210- Issue #5756: Install idle and pydoc with a 3 suffix.
211
Benjamin Petersonbd35b032009-04-04 23:16:41 +0000212Library
213-------
214
Tarek Ziadédd9f65f2009-05-06 07:26:24 +0000215- Issue #5940: distutils.command.build_clib.check_library_list was not doing
216 the right type checkings anymore.
217
Thomas Heller00cfc372009-05-05 19:04:40 +0000218- Issue #4875: On win32, ctypes.util.find_library does no longer
219 return directories.
220
Georg Brandl243ad662009-05-05 09:00:19 +0000221- Issue #5142: Add the ability to skip modules while stepping to pdb.
222
Georg Brandl991f9202009-05-05 08:31:54 +0000223- Issue #1309567: Fix linecache behavior of stripping subdirectories when
224 looking for files given by a relative filename.
225
Georg Brandleaa84ef2009-05-05 08:14:33 +0000226- Issue #5923: Update the ``turtle`` module to version 1.1, add two new
227 turtle demos in Demo/turtle.
228
Antoine Pitrou3c33e082009-05-04 21:21:36 +0000229- Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
230 extracting a file to the root directory.
231
Hirokazu Yamamotobbb9be72009-05-04 05:56:46 +0000232- Issue #5913: os.listdir() should fail for empty path on windows.
233
Antoine Pitroua9f48a02009-05-02 21:41:14 +0000234- Issue #5084: unpickling now interns the attribute names of pickled objects,
235 saving memory and avoiding growth in size of subsequent pickles. Proposal
236 and original patch by Jake McGuire.
237
Benjamin Petersonc6b607d2009-05-02 12:36:44 +0000238- The json module now works exclusively with str and not bytes.
239
Gregory P. Smithe54dff52009-05-01 22:13:48 +0000240- Issue #3959: The ipaddr module has been added to the standard library.
241 Contributed by Google.
242
Antoine Pitrou7fff0962009-05-01 21:09:44 +0000243- Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
244 error when a named pipe is encountered, rather than blocking infinitely.
245
Raymond Hettinger1f0db402009-04-29 00:38:08 +0000246- Issue #5857: tokenize.tokenize() now returns named tuples.
247
Thomas Hellerc1edc2d2009-04-28 19:55:58 +0000248- Issue #4305: ctypes should now build again on mipsel-linux-gnu
249
Antoine Pitrou7a0fedf2009-04-27 22:31:40 +0000250- Issue #1734234: Massively speedup ``unicodedata.normalize()`` when the
251 string is already in normalized form, by performing a quick check beforehand.
252 Original patch by Rauli Ruohonen.
253
Antoine Pitrou57f3d932009-04-27 21:04:19 +0000254- Issue #5853: calling a function of the mimetypes module from several threads
255 at once could hit the recursion limit if the mimetypes database hadn't been
256 initialized before.
257
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000258- Issue #5854: Updated __all__ to include some missing names and remove some
259 names which should not be exported.
260
Thomas Heller34596a92009-04-24 20:50:00 +0000261- Issue #3102: All global symbols that the _ctypes extension defines
262 are now prefixed with 'Py' or '_ctypes'.
263
264- Issue #5041: ctypes does now allow pickling wide character.
265
Mark Dickinsond4d95f82009-04-24 14:06:19 +0000266- Issue #5812: For the two-argument form of the Fraction constructor,
267 Fraction(m, n), m and n are permitted to be arbitrary Rational
268 instances.
269
Mark Dickinsoncf63f2f2009-04-22 17:50:21 +0000270- Issue #5812: Fraction('1e6') is valid: more generally, any string
271 that's valid for float() is now valid for Fraction(), with the
272 exception of strings representing NaNs and infinities.
273
Antoine Pitroucf4c7492009-04-19 00:09:36 +0000274- Issue #5734: BufferedRWPair was poorly tested and had several glaring
275 bugs. Patch by Brian Quinlan.
276
R. David Murray9e94ddf2009-04-13 17:06:33 +0000277- Issue #1161031: fix readwrite select flag handling: POLLPRI now
278 results in a handle_expt_event call, not handle_read_event, and POLLERR
279 and POLLNVAL now call handle_close, not handle_expt_event. Also,
280 dispatcher now has an 'ignore_log_types' attribute for suppressing
281 log messages, which is set to 'warning' by default.
282
Matthias Klosea3d29e82009-04-07 13:13:10 +0000283- Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
284 new arguments introduced in 2.5.
285
Walter Dörwald1b08b302009-04-25 14:13:56 +0000286- Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
287 makeunicodedata.py and regenerated the Unicode database (This fixes
288 u'\u1d79'.lower() == '\x00').
289
Matthias Klose535336f2009-04-07 13:49:45 +0000290Extension Modules
291-----------------
292
Benjamin Petersone04b6272009-05-04 22:25:21 +0000293- Issue #5881: Remove old undocumented compatibility interfaces in hashlib and
294 pwd.
295
Mark Dickinsonea835e72009-04-19 20:40:33 +0000296- Issue #5463: In struct module, remove deprecated float coercion
297 for integer type codes: struct.pack('L', 0.3) should now raise
298 an error. The _PY_STRUCT_FLOAT_COERCE constant has been removed.
299 The version number has been bumped to 0.3.
300
Matthias Klose535336f2009-04-07 13:49:45 +0000301- Issue #5359: Readd the Berkley-DB detection code to allow _dbm be built
302 using Berkley-DB.
303
Nick Coghlan47384702009-04-22 16:13:36 +0000304Tests
305-----
306
307- Issue #5354: New test support function import_fresh_module() makes
308 it easy to import both normal and optimised versions of modules.
309 test_heapq and test_warnings have been adjusted to use it, tests for
310 other modules with both C and Python implementations in the stdlib
311 can be adjusted to use it over time.
312
Walter Dörwald4ba80132009-04-25 12:48:43 +0000313- Issue #5837: Certain sequences of calls to set() and unset() for
314 support.EnvironmentVarGuard objects restored the environment variables
315 incorrectly on __exit__.
316
Benjamin Petersonb173f782009-05-05 22:31:58 +0000317C-API
318-----
319
320- Issue #5630: A replacement PyCObject API, PyCapsule, has been added.
321
Benjamin Petersonbd35b032009-04-04 23:16:41 +0000322
Benjamin Petersond1735892009-03-07 18:46:21 +0000323What's New in Python 3.1 alpha 2?
324=================================
325
Benjamin Peterson88f14352009-04-04 21:06:52 +0000326*Release date: 2009-4-4*
Benjamin Petersond1735892009-03-07 18:46:21 +0000327
328Core and Builtins
329-----------------
Benjamin Petersone099b372009-04-04 17:09:35 +0000330
Eric Smith1e1d7d22009-04-03 22:25:33 +0000331- Implement PEP 378, Format Specifier for Thousands Separator, for
332 integers.
Benjamin Petersond1735892009-03-07 18:46:21 +0000333
Benjamin Peterson8f76b492009-04-03 22:22:42 +0000334- Issue #5666: Py_BuildValue's 'c' code should create byte strings.
335
Benjamin Peterson7fe98532009-04-02 00:33:55 +0000336- Issue #5499: The 'c' code for argument parsing functions now only accepts a
337 byte, and the 'C' code only accepts a unicode character.
338
Georg Brandl406b3d82009-04-11 21:24:37 +0000339- Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
340 when hitting the recursion limit under certain circumstances.
341
Brett Cannon0759dd62009-04-01 18:13:07 +0000342- Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.
343
Georg Brandlab6f2f62009-03-31 04:16:10 +0000344- Fix a segfault when running test_exceptions with coverage, caused by
345 insufficient checks in accessors of Exception.__context__.
346
Guido van Rossum0ad59d42009-03-30 22:01:35 +0000347- Issue #5604: non-ASCII characters in module name passed to
348 imp.find_module() were converted to UTF-8 while the path is
349 converted to the default filesystem encoding, causing nonsense.
350
Benjamin Peterson09832742009-03-26 17:15:46 +0000351- Issue #5126: str.isprintable() returned False for space characters.
352
Ronald Oussorenfa1fcd12009-03-30 23:16:10 +0000353- Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
354 the end sys.path, for compatibility with the system install of Python.
355
Antoine Pitrou3a652b12009-03-23 18:52:06 +0000356- Issue #4688: Add a heuristic so that tuples and dicts containing only
357 untrackable objects are not tracked by the garbage collector. This can
358 reduce the size of collections and therefore the garbage collection overhead
359 on long-running programs, depending on their particular use of datatypes.
360
Mark Dickinson17e4fdd2009-03-23 18:44:57 +0000361- Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
362 improve its performance. Long divisions and remainder operations
363 are now between 50% and 150% faster.
364
Mark Dickinsonbd792642009-03-18 20:06:12 +0000365- Issue #4258: Make it possible to use base 2**30 instead of base
366 2**15 for the internal representation of integers, for performance
367 reasons. Base 2**30 is enabled by default on 64-bit machines. Add
368 --enable-big-digits option to configure, which overrides the
369 default. Add sys.int_info structseq to provide information about
370 the internal format.
371
Mark Dickinson081dfee2009-03-18 14:47:41 +0000372- Issue #4474: PyUnicode_FromWideChar now converts characters outside
373 the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
374 and sizeof(Py_UNICODE) == 2.
375
Eric Smith8ec90442009-03-14 12:29:34 +0000376- Issue #5237: Allow auto-numbered fields in str.format(). For
377 example: '{} {}'.format(1, 2) == '1 2'.
378
Antoine Pitrou652e7072009-03-13 19:25:20 +0000379- Issue #5392: when a very low recursion limit was set, the interpreter would
380 abort with a fatal error after the recursion limit was hit twice.
381
Matthias Klose042f1332009-04-04 14:32:42 +0000382- Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
383 short file names.
384
Benjamin Petersond1735892009-03-07 18:46:21 +0000385Library
386-------
387
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000388- Issue #2625: added missing items() call to the for loop in
R. David Murray548ac412009-04-02 19:44:43 +0000389 mailbox.MH.get_message().
390
Hye-Shik Chang944820b2009-04-02 10:33:16 +0000391- Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
392 error substitutions from non-strict codec error callbacks in
393 incrementalencoder and StreamWriter.
394
Georg Brandl33c28812009-04-01 23:07:29 +0000395- Issue #5656: Fix the coverage reporting when running the test suite with
396 the -T argument.
397
Raymond Hettinger3f10a952009-04-01 19:05:50 +0000398- Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.
399
Georg Brandl4ed72ac2009-04-01 04:28:33 +0000400- Issue #5624: Fix the _winreg module name still used in several modules.
401
Benjamin Petersona1b49012009-03-31 23:11:32 +0000402- Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.
403
Jesse Nollera9314042009-03-31 22:36:44 +0000404- Issue #5619: Multiprocessing children disobey the debug flag and causes
405 popups on windows buildbots. Patch applied to work around this issue.
406
Jesse Noller32d68c22009-03-31 18:48:42 +0000407- Issue #5400: Added patch for multiprocessing on netbsd compilation/support
408
Hirokazu Yamamoto16caab02009-03-31 13:44:06 +0000409- Issue #5387: Fixed mmap.move crash by integer overflow.
410
Jesse Nollerf8d00852009-03-31 03:25:07 +0000411- Issue #5261: Patch multiprocessing's semaphore.c to support context
412 manager use: "with multiprocessing.Lock()" works now.
413
Brett Cannon7f6b4f82009-03-30 21:30:26 +0000414- Issue #5236: Change time.strptime() to only take strings. Didn't work with
415 bytes already but the failure was non-obvious.
416
Jesse Noller7af4ef82009-03-30 16:47:15 +0000417- Issue #5177: Multiprocessing's SocketListener class now uses
418 socket.SO_REUSEADDR on all connections so that the user no longer needs
419 to wait 120 seconds for the socket to expire.
420
Benjamin Peterson48e24782009-03-29 13:02:52 +0000421- Issue #5595: Fix UnboundedLocalError in ntpath.ismount().
422
Antoine Pitrou66994e12009-03-29 00:45:26 +0000423- Issue #1174606: Calling read() without arguments of an unbounded file
424 (typically /dev/zero under Unix) could crash the interpreter.
425
Benjamin Peterson59406a92009-03-26 17:10:29 +0000426- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
427 io.BufferedRandom have been deprecated for removal in Python 3.2.
428
Lars Gustäbel42e00912009-03-22 20:34:29 +0000429- Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
430 forever on incomplete input. That caused tarfile.open() to hang when used
431 with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
432 partial bzip2 compressed data.
433
Mark Dickinson79f52032009-03-17 23:12:51 +0000434- Issue #2110: Add support for thousands separator and 'n' type
435 specifier to Decimal.__format__
436
Mark Dickinson9c59fe02009-03-17 18:15:08 +0000437- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
438 '>' alignment characters.
439
Antoine Pitrou0ae29cf2009-03-13 22:33:17 +0000440- The error detection code in FileIO.close() could fail to reflect the `errno`
441 value, and report it as -1 instead.
442
Antoine Pitroua28fcfd2009-03-13 23:42:55 +0000443- Issue #5016: FileIO.seekable() could return False if the file position
444 was negative when truncated to a C int. Patch by Victor Stinner.
445
Mark Dickinsonae681df2009-03-21 10:26:31 +0000446Extension Modules
447-----------------
448
Benjamin Petersone099b372009-04-04 17:09:35 +0000449- Issue #5391: mmap now deals exclusively with bytes.
450
Mark Dickinsonae681df2009-03-21 10:26:31 +0000451- Issue #5463: In struct module, remove deprecated overflow wrapping
452 when packing an integer: struct.pack('=L', -1) now raises
Mark Dickinsonb40b9472009-03-29 16:58:21 +0000453 struct.error instead of returning b'\xff\xff\xff\xff'. The
454 _PY_STRUCT_RANGE_CHECKING and _PY_STRUCT_OVERFLOW_MASKING constants
455 have been removed from the struct module.
Mark Dickinsonae681df2009-03-21 10:26:31 +0000456
Benjamin Petersond1735892009-03-07 18:46:21 +0000457
Benjamin Petersona58a6262009-03-07 16:34:40 +0000458What's New in Python 3.1 alpha 1
Barry Warsaw97f005d2008-12-03 16:46:14 +0000459================================
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000460
Benjamin Petersona58a6262009-03-07 16:34:40 +0000461*Release date: 2009-03-07*
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000462
463Core and Builtins
464-----------------
465
Benjamin Peterson4fa88fa2009-03-04 00:14:51 +0000466- The io module has been reimplemented in C for speed.
467
Raymond Hettingerb0d56af2009-03-03 10:52:49 +0000468- Give dict views an informative __repr__.
469
Eric Smith5e5c0db2009-02-20 14:25:03 +0000470- Issue #5247: Improve error message when unknown format codes are
471 used when using str.format() with str, int, and float arguments.
472
Hirokazu Yamamoto575d1332009-02-16 09:13:20 +0000473- Issue #5249: time.strftime returned malformed string when format string
474 contained non ascii character on windows.
475
Benjamin Petersonf5b52242009-03-02 23:31:26 +0000476- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
477 source has already been decoded into str.
478
Antoine Pitrou79eee6b2009-02-13 14:01:05 +0000479- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
480 rotating the object pointer by 4 bits to the right.
481
Mark Dickinson87ec0852009-02-09 17:15:59 +0000482- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
483 it now forces its argument to double before testing for infinity.
484
Benjamin Petersonee1ae7c2009-02-08 21:07:20 +0000485- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
486 returns a non-number type.
487
Benjamin Peterson87618552009-02-08 15:00:52 +0000488- Issue #5182: Removed memoryview.__str__.
489
Mark Dickinsonc008a172009-02-01 13:59:22 +0000490- Issue #1717: Removed builtin cmp() function, dropped tp_compare
491 slot, the C API functions PyObject_Compare and PyUnicode_Compare and
Mark Dickinsone94c6792009-02-02 20:36:42 +0000492 the type definition cmpfunc. The tp_compare slot has been renamed
493 to tp_reserved, and is reserved for future usage.
Mark Dickinsonf02e0aa2009-02-01 12:13:56 +0000494
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000495- Issue #1242657: the __len__() and __length_hint__() calls in several tools
Raymond Hettingere8364232009-02-02 22:55:09 +0000496 were suppressing all exceptions. These include list() and bytearray().
497
Mark Dickinson1124e712009-01-28 21:25:58 +0000498- Issue #4707: round(x, n) now returns an integer if x is an integer.
499 Previously it returned a float.
500
Antoine Pitroub52ec782009-01-25 16:34:23 +0000501- Issue #4753: By enabling a configure option named '--with-computed-gotos'
502 on compilers that support it (notably: gcc, SunPro, icc), the bytecode
503 evaluation loop is compiled with a new dispatch mechanism which gives
504 speedups of up to 20%, depending on the system, on various benchmarks.
505
Antoine Pitrou81fabdb2009-01-22 10:11:36 +0000506- Issue #4874: Most builtin decoders now reject unicode input.
507
Mark Dickinson9ffc0202009-01-20 20:45:53 +0000508- Issue #4842: Don't allow trailing 'L' when constructing an integer
509 from a string.
510
Benjamin Peterson05e782f2009-01-19 15:15:02 +0000511- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.
512
Antoine Pitroue4bc7f62009-01-17 21:06:43 +0000513- Issue #4838: When a module is deallocated, free the memory backing the
514 optional module state data.
515
Mark Dickinson8055afd2009-01-17 10:04:45 +0000516- Issue #4910: Rename nb_long slot to nb_reserved, and change its
517 type to (void *).
518
Antoine Pitrou8d4e5052009-01-13 22:59:11 +0000519- Issue #4935: The overflow checking code in the expandtabs() method common
520 to str, bytes and bytearray could be optimized away by the compiler, letting
521 the interpreter segfault instead of raising an error.
522
Amaury Forgeot d'Arcf343e012009-01-12 23:58:21 +0000523- Issue #3720: Fix a crash when an iterator modifies its class and removes its
524 __next__ method.
525
Mark Dickinsone5e298f2009-01-12 20:49:19 +0000526- Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
527 function no longer attempt to call the __long__ slot to convert an object
528 to an integer. Only the __int__ and __trunc__ slots are examined.
529
Martin v. Löwis7c2b66c2009-01-12 08:21:03 +0000530- Issue #4893: Use NT threading on CE.
531
Martin v. Löwisec59d042009-01-12 07:59:10 +0000532- Issue #4915: Port sysmodule to Windows CE.
533
Antoine Pitrouab868312009-01-10 15:40:25 +0000534- Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
535 common cases are optimized thanks to a dedicated fast path and a moderate
536 amount of loop unrolling.
537
Antoine Pitrou14b78f52009-01-09 22:27:08 +0000538- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
539 collecting the oldest generation) so that allocating lots of objects without
540 destroying them does not show quadratic performance. Based on a proposal by
541 Martin von Löwis at
542 http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
543
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000544- Issue #4604: Some objects of the I/O library could still be used after
Antoine Pitrou8043cf82009-01-09 19:54:29 +0000545 having been closed (for instance, a read() call could return some
546 previously buffered data). Patch by Dmitry Vasiliev.
547
Antoine Pitrou05608432009-01-09 18:53:14 +0000548- Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
549 flag to work properly. Furthermore, when specifying -u, the text stdout
550 and stderr streams have line-by-line buffering enabled (the default being
551 to buffer arbitrary chunks of data).
552
Raymond Hettinger35631532009-01-09 03:58:09 +0000553- The internal table, _PyLong_DigitValue, is now an array of unsigned chars
554 instead of ints (reducing its size from 4 to 8 times thereby reducing
555 Python's overall memory).
556
Antoine Pitroud35cbf62009-01-06 19:02:24 +0000557- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
558 an existing .py counterpart, override the co_filename attributes of all
559 code objects if the original filename is obsolete (which can happen if the
560 file has been renamed, moved, or if it is accessed through different paths).
561 Patch by Ziga Seilnacht and Jean-Paul Calderone.
562
Antoine Pitrouc3b39242009-01-03 16:59:18 +0000563- Issue #4580: Fix slicing of memoryviews when the item size is greater than
564 one byte. Also fixes the meaning of len() so that it returns the number of
565 items, rather than the size in bytes.
566
Martin v. Löwis5c88d812009-01-02 20:47:48 +0000567- Issue #4075: Use OutputDebugStringW in Py_FatalError.
568
Amaury Forgeot d'Arc374e2202009-01-01 23:05:36 +0000569- Issue #4747: When the terminal does not use utf-8, executing a script with
570 non-ascii characters in its name could fail with a "SyntaxError: None" error.
571
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000572- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
Hirokazu Yamamoto8ed9a802009-01-01 16:09:52 +0000573 file with `bytes' filename on Windows.
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000574
Antoine Pitrou7ddda782009-01-01 15:35:33 +0000575- Issue #3680: Reference cycles created through a dict, set or deque iterator
576 did not get collected.
577
Nick Coghlanf1f2f682008-12-30 07:29:12 +0000578- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
579 where the tp_hash and tp_dict slots are both NULL.
580
Georg Brandlccc47b62008-12-28 11:44:14 +0000581- Issue #4759: None is now allowed as the first argument of
582 bytearray.translate(). It was always allowed for bytes.translate().
583
Skip Montanaro80072cb2008-12-23 03:51:14 +0000584- Added test case to ensure attempts to read from a file opened for writing
585 fail.
586
Antoine Pitrou51f3ef92008-12-20 13:14:23 +0000587- Issue #3106: Speedup some comparisons (str/str and int/int).
588
Antoine Pitrouf289ae62008-12-18 11:06:25 +0000589- Issue #2183: Simplify and optimize bytecode for list, dict and set
590 comprehensions. Original patch for list comprehensions by Neal Norwitz.
591
Antoine Pitrou621601a2008-12-17 23:18:19 +0000592- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
593 print elapsed times, not only when some objects are uncollectable /
594 unreachable. Original patch by Neil Schemenauer.
595
Mark Dickinson54bc1ec2008-12-17 16:19:07 +0000596- Issue #3439: Add a bit_length method to int.
597
Mark Dickinsonda2706b2008-12-11 18:03:03 +0000598- Issue #2173: When getting device encoding, check that return value of
599 nl_langinfo is not the empty string. This was causing silent build
600 failures on OS X.
601
Jeffrey Yasskinb9083f32008-12-11 06:18:33 +0000602- Issue #4597: Fixed several opcodes that weren't always propagating
603 exceptions.
604
605- Issue #4589: Fixed exception handling when the __exit__ function of a
Amaury Forgeot d'Arc10b24e82008-12-10 23:49:33 +0000606 context manager returns a value that cannot be converted to a bool.
607
Mark Dickinsonfd24b322008-12-06 15:33:31 +0000608- Issue #4445: Replace "sizeof(PyBytesObject)" with
609 "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
610 bytes instances. On a typical machine this saves 3 bytes of memory
611 (on average) per allocation of a bytes instance.
612
Christian Heimesa872de52008-12-05 08:26:55 +0000613- Issue #4533: File read operation was dreadfully slow due to a slowly
614 growing read buffer. Fixed by using the same growth rate algorithm as
615 Python 2.x.
616
Antoine Pitrou5504e892008-12-06 21:27:53 +0000617- Issue #4509: Various issues surrounding resize of bytearray objects to
618 which there are buffer exports (e.g. memoryview instances).
619
Georg Brandlf9734072008-12-07 15:30:06 +0000620- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
621 method on file objects with closefd=False. The file descriptor is still
622 kept open but the file object behaves like a closed file. The ``FileIO``
623 object also got a new readonly attribute ``closefd``.
Matthias Klose7e1b8fa2008-11-26 17:22:04 +0000624
Antoine Pitroubc420402008-12-07 20:14:49 +0000625- Issue #4569: Interpreter crash when mutating a memoryview with an item size
626 larger than 1.
627
Benjamin Peterson371ccfb2008-12-27 19:03:36 +0000628- Issue #4748: Lambda generators no longer return a value.
629
Gregory P. Smithccc5ae72009-03-02 05:21:55 +0000630- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
631
Walter Dörwaldc1651a02009-05-03 22:55:55 +0000632- Issue #5108: Handle %s like %S, %R and %A in PyUnicode_FromFormatV(): Call
633 PyUnicode_DecodeUTF8() once, remember the result and output it in a second
634 step. This avoids problems with counting UTF-8 bytes that ignores the effect
635 of using the replace error handler in PyUnicode_DecodeUTF8().
636
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000637Library
638-------
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000639
Tarek Ziadé822eb842009-05-19 16:22:57 +0000640- Issue #6062: In distutils, fixed the package option of build_ext. Feedback
641 and tests on pywin32 by Tim Golden.
642
Tarek Ziadé93fb3aa2009-05-18 12:29:06 +0000643- Issue #6053: Fixed distutils tests on win32. patch by Hirokazu Yamamoto.
644
Tarek Ziadéd18a84e2009-05-18 08:07:46 +0000645- Issue #6046: Fixed the library extension when distutils build_ext is used
646 inplace. Initial patch by Roumen Petrov.
647
Tarek Ziadé5af55c62009-05-16 16:52:13 +0000648- Issue #6041: Now distutils `sdist` and `register` commands use `check` as a
649 subcommand.
650
Tarek Ziadé4210c6e2009-05-14 20:20:47 +0000651- Issue #6022: a test file was created in the current working directory by
652 test_get_outputs in Distutils.
653
Tarek Ziadéff0e5002009-05-12 17:14:01 +0000654- Issue #5977: distutils build_ext.get_outputs was not taking into account the
655 inplace option. Initial patch by kxroberto.
656
Tarek Ziadé06fbee12009-05-10 10:34:01 +0000657- Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
658 for old-style extensions.
659
Tarek Ziadébe5b1b92009-05-09 10:09:11 +0000660- Issue #5976: Fixed Distutils test_check_environ.
661
Tarek Ziadé5662d3e2009-05-07 21:24:43 +0000662- Issue #5941: Distutils build_clib command was not working anymore because
663 of an incomplete costumization of the archiver command. Added ARFLAGS in the
664 Makefile besides AR and make Distutils use it. Original patch by David
665 Cournapeau.
666
R. David Murrayb507d2e2009-04-29 15:34:32 +0000667- Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.
668
Tarek Ziadé81623822009-04-29 08:07:44 +0000669- Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
670 anymore.
671
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000672- Issue #5810: Fixed Distutils test_build_scripts so it uses
Tarek Ziadé939f9c82009-04-25 12:53:56 +0000673 sysconfig.get_config_vars.
674
Tarek Ziadé23336082009-04-25 12:39:56 +0000675- Issue #4951: Fixed failure in test_httpservers.
676
Thomas Hellerd3cfe992009-04-24 20:10:24 +0000677- Issue #5795: Fixed test_distutils failure on Debian ppc.
678
Tarek Ziadé822e1d42009-04-13 12:37:57 +0000679- Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.
680
Georg Brandl1f9fa312009-04-27 16:42:58 +0000681- Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
682 a value in SafeConfigParser.
683
Tarek Ziadéf396ecf2009-04-11 15:00:43 +0000684- Issue #5732: added a new command in Distutils: check.
685
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000686- Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
Tarek Ziadéa6191802009-04-09 22:02:39 +0000687 platforms. Initial patch by Paul Moore.
688
Tarek Ziadéf6370502009-04-05 22:57:21 +0000689- Issue #5095: Added bdist_msi to the list of bdist supported formats.
690 Initial fix by Steven Bethard.
691
Tarek Ziadé889b0aa2009-04-05 21:49:36 +0000692- Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
693 Initial fix by Wayne Davison.
694
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000695- Issue #5694: removed spurious test output in Distutils (test_clean).
Tarek Ziadéea261632009-04-05 18:33:34 +0000696
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000697- Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
Georg Brandl236f7972009-04-05 14:28:42 +0000698
Brett Cannonf47e84c2009-04-01 16:06:01 +0000699- Issue #1665206 (partially): Move imports in cgitb to the top of the module
700 instead of performing them in functions. Helps prevent import deadlocking in
701 threads.
702
R. David Murraye59482e2009-04-01 03:42:00 +0000703- Issue #2522: locale.format now checks its first argument to ensure it has
704 been passed only one pattern, avoiding mysterious errors where it appeared
705 that it was failing to do localization.
706
Tarek Ziadéb2e36f12009-03-31 22:37:55 +0000707- Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
708 Brandl.
709
Antoine Pitrou350370c2009-03-14 00:13:13 +0000710- Issue #1222: locale.format() bug when the thousands separator is a space
711 character.
712
Tarek Ziadé516db942009-03-11 12:52:00 +0000713- Issue #5472: Fixed distutils.test_util tear down. Original patch by
714 Tim Golden.
715
Raymond Hettinger5bb0f0e2009-03-10 12:56:32 +0000716- collections.deque() objects now have a read-only attribute called maxlen.
717
Guilherme Polof45b4cc2009-03-07 02:19:14 +0000718- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
719 it is has been populated and properly configured in order to prevent
720 window flashing.
721
Guilherme Polo56f5be52009-03-07 01:54:57 +0000722- Issue #4792: Prevent a segfault in _tkinter by using the
723 guaranteed to be safe interp argument given to the PythonCmd in place of
724 the Tcl interpreter taken from a PythonCmd_ClientData.
725
726- Issue #5193: Guarantee that tkinter.Text.search returns a string.
727
Tarek Ziadé63b64c02009-03-07 00:51:53 +0000728- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
729 Original patch by Akira Kitada.
730
Hirokazu Yamamoto54d0df62009-03-06 03:04:07 +0000731- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.
732
Hirokazu Yamamoto8e722bc2009-03-05 14:33:01 +0000733- Issue #5385: Fixed mmap crash after resize failure on windows.
734
Hirokazu Yamamoto0c988172009-03-03 22:41:26 +0000735- Issue #5179: Fixed subprocess handle leak on failure on windows.
736
Raymond Hettinger2d32f632009-03-02 21:24:57 +0000737- PEP 372: Added collections.OrderedDict().
738
Raymond Hettingera4f52b12009-03-02 22:28:31 +0000739- The _asdict() for method for namedtuples now returns an OrderedDict().
740
Raymond Hettinger0663a1e2009-03-02 23:06:00 +0000741- configparser now defaults to using an ordered dictionary.
742
Benjamin Petersone0124bd2009-03-09 21:04:33 +0000743- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
744 import guess_extension`` was used.
745
Hirokazu Yamamoto10c99372009-02-28 12:21:53 +0000746- Issue #1733986: Fixed mmap crash in accessing elements of second map object
747 with same tagname but larger size than first map. (Windows)
748
Hirokazu Yamamoto39c6dea2009-02-28 10:56:50 +0000749- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
750 overrun.
751
Tarek Ziadéf0721222009-02-28 10:16:43 +0000752- Issue #1533164: Installed but not listed *.pyo was breaking Distutils
753 bdist_rpm command.
754
755- Issue #5378: added --quiet option to Distutils bdist_rpm command.
756
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000757- Issue #5052: make Distutils compatible with 2.3 again.
758
Tarek Ziadé0f31e6d2009-02-25 22:31:38 +0000759- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
760 in Distutils tests.
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000761
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000762- Issue #5287: Add exception handling around findCaller() call to help out
763 IronPython.
764
Hirokazu Yamamoto0654ccd2009-02-18 16:38:00 +0000765- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
766 The file was resized to wrong size.
767
768- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
769
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000770- Issue #2279: distutils.sdist.add_defaults now add files
Tarek Ziadé0d0506e2009-02-16 21:49:12 +0000771 from the package_data and the data_files metadata.
772
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000773- Issue #5257: refactored all tests in distutils, so they use
Tarek Ziadéc1375d52009-02-14 14:35:51 +0000774 support.TempdirManager, to avoid writing in the tests directory.
775
Tarek Ziadé68c50952009-02-13 23:04:17 +0000776- Issue #4524: distutils build_script command failed with --with-suffix=3.
777 Initial patch by Amaury Forgeot d'Arc.
778
Tarek Ziadé811d6242009-02-13 22:26:15 +0000779- Issue #2461: added tests for distutils.util
780
Mark Dickinsonc28ad272009-02-12 17:58:36 +0000781- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
782 which inherited from numbers.py which did not have __slots__ defined. The
783 numbers hierarchy now has its own __slots__ declarations.
784
Antoine Pitroub353c122009-02-11 00:39:14 +0000785- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
786 encoding.
787
Thomas Heller465c8022009-02-10 18:59:04 +0000788- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
789 function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
790
Tarek Ziadé7d5e9872009-02-10 12:36:33 +0000791- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
792 under NT and OS2. Patch by Philip Jenvey.
793
Brett Cannonbefb14f2009-02-10 02:10:16 +0000794- Issue #5128: Make compileall properly inspect bytecode to determine if needs
795 to be recreated. This avoids a timing hole thanks to the old reliance on the
796 ctime of the files involved.
797
Guilherme Polob681df42009-02-09 22:33:59 +0000798- Issue #5122: Synchronize tk load failure check to prevent a potential
799 deadlock.
800
Benjamin Petersona86f2c02009-02-10 02:41:10 +0000801- Issue #1818: collections.namedtuple() now supports a keyword argument
802 'rename' which lets invalid fieldnames be automatically converted to
803 positional names in the form, _1, _2, ...
804
Guilherme Poloae098992009-02-09 16:44:24 +0000805- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
806
Nick Coghlan9a1d6e32009-02-08 03:37:27 +0000807- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
808 public documented method ``ZipImporter.get_filename()``.
809
Nick Coghlan3f48ae32009-02-08 01:58:26 +0000810- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
811 the execution of packages by looking for and executing a ``__main__``
812 submodule when a package name is supplied. Initial patch by Andi
813 Vajda.
814
Guilherme Polo491aee22009-02-06 23:16:11 +0000815- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
816 not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
817 Tkapp_Call when calling from a thread different than the one that created
818 the Tcl interpreter. Patch by Robert Hancock.
819
Eric Smith0e5b5622009-02-06 01:32:42 +0000820- Issue #4285: Change sys.version_info to be a named tuple. Patch by
821 Ross Light.
822
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000823- Issue #1520877: Now distutils.sysconfig reads $AR from the
Tarek Ziadéd3409de2009-02-06 01:18:36 +0000824 environment/Makefile. Patch by Douglas Greiman.
825
Tarek Ziadé70a74eb2009-02-06 00:38:35 +0000826- Issue #1276768: The verbose option was not used in the code of
827 distutils.file_util and distutils.dir_util.
828
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000829- Issue #5132: Fixed trouble building extensions under Solaris with
Tarek Ziadé5874ef12009-02-05 22:56:14 +0000830 --enabled-shared activated. Initial patch by Dave Peterson.
831
Guilherme Polo7f423952009-02-02 21:17:09 +0000832- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
833
Raymond Hettinger85602262009-02-03 04:19:10 +0000834- The shelve module now defaults to pickle protocol 3.
835
Brett Cannone61426e2009-01-30 01:31:34 +0000836- Fix a bug in the trace module where a bytes object from co_lnotab had its
837 items being passed through ord().
838
Antoine Pitrou0dcc3cd2009-01-29 20:26:59 +0000839- Issue #2047: shutil.move() could believe that its destination path was
840 inside its source path if it began with the same letters (e.g. "src" vs.
841 "src.new").
842
Guilherme Polo5f238482009-01-28 14:41:10 +0000843- Added the ttk module. See issue #2983: Ttk support for Tkinter.
844
Raymond Hettinger89e12962009-01-26 02:09:03 +0000845- Removed isSequenceType(), isMappingType, and isNumberType() from the
846 operator module; use the abstract base classes instead. Also removed
847 the repeat() function; use mul() instead.
848
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000849- Issue #5021: doctest.testfile() did not create __name__ and
Raymond Hettinger0f055172009-01-27 10:06:09 +0000850 collections.namedtuple() relied on __name__ being defined.
851
852- Backport importlib from Python 3.1. Only the import_module() function has
853 been backported to help facilitate transitions from 2.7 to 3.1.
854
Tarek Ziadé0302cf52009-01-26 17:23:20 +0000855- Issue #1885: distutils. When running sdist with --formats=tar,gztar
856 the tar file was overriden by the gztar one.
857
Tarek Ziadé4d4456f2009-01-25 18:27:45 +0000858- Issue #4863: distutils.mwerkscompiler has been removed.
859
Raymond Hettingerd07d9392009-01-27 04:20:44 +0000860- Added a new itertools functions: combinations_with_replacement()
861 and compress().
Raymond Hettinger6b3b0fc2009-01-26 02:56:58 +0000862
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000863- Issue #5032: added a step argument to itertools.count() and
Raymond Hettinger30729212009-02-12 06:28:27 +0000864 allowed non-integer arguments.
865
Jesse Noller41faa542009-01-25 03:45:53 +0000866- Fix and properly document the multiprocessing module's logging
867 support, expose the internal levels and provide proper usage
868 examples.
869
Mark Dickinsoncddcf442009-01-24 21:46:33 +0000870- Issue #1672332: fix unpickling of subnormal floats, which was
871 producing a ValueError on some platforms.
872
Martin v. Löwisacbf4612009-01-24 16:19:45 +0000873- Issue #3881: Help Tcl to load even when started through the
874 unreadable local symlink to "Program Files" on Vista.
875
Martin v. Löwis59e47792009-01-24 14:10:07 +0000876- Issue #4710: Extract directories properly in the zipfile module;
877 allow adding directories to a zipfile.
878
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000879- Issue #3807: _multiprocessing build fails when configure is passed
Jesse Noller6fd47e22009-01-23 14:09:08 +0000880 --without-threads argument. When this occurs, _multiprocessing will
881 be disabled, and not compiled.
882
Antoine Pitrou08838b62009-01-21 00:55:13 +0000883- Issue #5008: When a file is opened in append mode with the new IO library,
884 do an explicit seek to the end of file (so that e.g. tell() returns the
885 file size rather than 0). This is consistent with the behaviour of the
886 traditional 2.x file object.
887
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000888- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
889 parameter was set.
890
Mark Dickinson8dd05142009-01-20 20:43:58 +0000891- Issue #4842: Always append a trailing 'L' when pickling longs using
892 pickle protocol 0. When reading, the 'L' is optional.
893
Brett Cannonafccd632009-01-20 02:21:27 +0000894- Add the importlib package.
895
Jesse Noller9a0fc972009-01-18 21:12:58 +0000896- Issue #4301: Patch the logging module to add processName support, remove
897 _check_logger_class from multiprocessing.
898
Jesse Noller1cbb17a2009-01-18 19:45:18 +0000899- Issue #3325: Remove python2.x try: except: imports for old cPickle from
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000900 multiprocessing.
Jesse Nollerf70a5382009-01-18 19:44:02 +0000901
Benjamin Peterson9953a8d2009-01-17 04:15:01 +0000902- Issue #4959: inspect.formatargspec now works for keyword only arguments
903 without defaults.
904
Jesse Noller6214edd2009-01-19 16:23:53 +0000905- Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
906 for *nix machines for negative handles and large int handles. Without this check
907 it is possible to segfault the interpreter.
908
Jesse Nollerb0516a62009-01-18 03:11:38 +0000909- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
910 in sharedctypes.py.
911
912- Issue #1225107: inspect.isclass() returned True for instances with a custom
913 __getattr__.
914
Gregory P. Smithde3369f2009-01-12 04:50:11 +0000915- Issue #3826 and #4791: The socket module now closes the underlying socket
916 appropriately when it is being used via socket.makefile() objects
917 rather than delaying the close by waiting for garbage collection to do it.
918
Raymond Hettingerb8baf632009-01-14 02:20:07 +0000919- Issue #1696199: Add collections.Counter() for rapid and convenient
920 counting.
921
Antoine Pitrou308705e2009-01-10 16:22:51 +0000922- Issue #3860: GzipFile and BZ2File now support the context manager protocol.
923
Thomas Heller5e4e4272009-01-08 09:34:20 +0000924- Issue #4867: Fixed a crash in ctypes when passing a string to a
925 function without defining argtypes.
926
Antoine Pitrou42db3ef2009-01-04 21:37:59 +0000927- Issue #4272: Add an optional argument to the GzipFile constructor to override
928 the timestamp in the gzip stream. The default value remains the current time.
929 The information can be used by e.g. gunzip when decompressing. Patch by
930 Jacques Frechet.
931
Mark Dickinson315a20a2009-01-04 21:34:18 +0000932- Restore Python 2.3 compatibility for decimal.py.
933
Guilherme Polo3f5f8222009-01-03 22:00:39 +0000934- Issue #3638: Remove functions from _tkinter module level that depend on
935 TkappObject to work with multiple threads.
936
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000937- Issue #4718: Adapt the wsgiref package so that it actually works with
938 Python 3.x, in accordance with the `official amendments of the spec
Antoine Pitrou38a66ad2009-01-03 18:41:49 +0000939 <http://www.wsgi.org/wsgi/Amendments_1.0>`_.
940
Raymond Hettinger771ed762009-01-03 19:20:32 +0000941- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
942 to the decimal module.
943
Georg Brandl3a9b0622009-01-03 22:07:57 +0000944- Fractions.from_float() no longer loses precision for integers too big to
945 cast as floats.
946
Mark Dickinsonf9236412009-01-02 23:23:21 +0000947- Issue #4812: add missing underscore prefix to some internal-use-only
948 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
949
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000950- Issue #4790: The nsmallest() and nlargest() functions in the heapq module
Georg Brandl3a9b0622009-01-03 22:07:57 +0000951 did unnecessary work in the common case where no key function was specified.
952
Georg Brandlb1441c72009-01-03 22:33:39 +0000953- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
954 the function is not a generator.
955
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000956- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
957 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
Tarek Ziadé9df8ce32008-12-30 23:09:20 +0000958
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000959- Issue #4646: distutils was choking on empty options arg in the setup
Tarek Ziadé4450dcf2008-12-29 22:38:38 +0000960 function. Original patch by Thomas Heller.
961
Martin v. Löwis1f1620e2008-12-29 16:27:13 +0000962- Issue #3767: Convert Tk object to string in tkColorChooser.
963
Martin v. Löwise354d782008-12-29 16:03:04 +0000964- Issue #3248: Allow placing ScrolledText in a PanedWindow.
965
Antoine Pitrou5acd41e2008-12-28 14:29:00 +0000966- Issue #4444: Allow assertRaises() to be used as a context handler, so that
967 the code under test can be written inline if more practical.
968
Georg Brandldb7b6b92009-01-01 15:53:14 +0000969- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
970 works as expected in the interactive environment.
971
Antoine Pitroudb5fe662008-12-27 15:50:40 +0000972- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
973 Gabriel Genellina.
974
Antoine Pitrou180a3362008-12-14 16:36:46 +0000975- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
976 boundary.
977
Nick Coghlanf088e5e2008-12-14 11:50:48 +0000978- Issue #4223: inspect.getsource() will now correctly display source code
979 for packages loaded via zipimport (or any other conformant PEP 302
980 loader). Original patch by Alexander Belopolsky.
981
982- Issue #4201: pdb can now access and display source code loaded via
983 zipimport (or any other conformant PEP 302 loader). Original patch by
984 Alexander Belopolsky.
985
986- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
987 302 conformant loader) will now work correctly in most cases (they
988 are still subject to the constraints that exist for all code running
989 from inside a module loaded via a PEP 302 loader and attempting to
990 perform IO operations based on __file__). Original patch by
991 Alexander Belopolsky.
992
993- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
994 allows backporting to maintenance branches. Original patch by
995 Alexander Belopolsky.
996
Antoine Pitrou7c59bc62008-12-13 23:20:54 +0000997- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
998 a non-ASCII letter.
999
Lars Gustäbel43fcf3a2008-12-12 14:58:38 +00001000- Issue #4616: TarFile.utime(): Restore directory times on Windows.
1001
Benjamin Peterson433f32c2008-12-12 01:25:05 +00001002- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
1003 codec cannot be found. This is for compatibility with the builtin behavior.
1004
Facundo Batista708d5812008-12-11 04:20:07 +00001005- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
1006 give correct results in the case where one argument is a quiet NaN
1007 and the other is a finite number that requires rounding.
1008
Skip Montanaroc1ce2862008-12-06 17:25:02 +00001009- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
1010 libs.
1011
Georg Brandlf9734072008-12-07 15:30:06 +00001012- Added the subprocess.check_call_output() convenience function to get output
1013 from a subprocess on success or raise an exception on error.
1014
1015- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
1016 support unusual filenames (such as those containing semi-colons) in
1017 Content-Disposition headers.
1018
1019- Issue #4384: Added logging integration with warnings module using
1020 captureWarnings(). This change includes a NullHandler which does nothing;
1021 it will be of use to library developers who want to avoid the "No handlers
1022 could be found for logger XXX" message which can appear if the library user
1023 doesn't configure logging.
1024
1025- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
1026 exception.
1027
Georg Brandleee31162008-12-07 15:15:22 +00001028- Issue #4529: fix the parser module's validation of try-except-finally
1029 statements.
1030
1031- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
1032 not a malformed option.
1033
1034- Added the subprocess.check_output() convenience function to get output
1035 from a subprocess on success or raise an exception on error.
1036
Amaury Forgeot d'Arcbc9d4742008-12-05 01:40:43 +00001037- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
1038 the corresponding tests now pass.
1039
Amaury Forgeot d'Arcbc2ce572008-12-05 01:02:21 +00001040- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
1041 it was calling the wrong open() function.
1042
Fred Drake9a0a65b2008-12-04 19:24:50 +00001043- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
1044 support unusual filenames (such as those containing semi-colons) in
1045 Content-Disposition headers.
1046
Matthias Klose2c7e3ee2009-01-10 17:08:25 +00001047- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
1048 biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
1049
Benjamin Peterson5c6d7872009-02-06 02:40:07 +00001050- Issue #5104: The socket module now raises OverflowError when 16-bit port and
1051 protocol numbers are supplied outside the allowed 0-65536 range on bind()
1052 and getservbyport().
1053
Jeroen Ruigrok van der Werven0a866942009-05-08 14:18:00 +00001054- Windows locale mapping updated to Vista.
1055
Antoine Pitrou2a013ea2008-12-27 20:39:28 +00001056Tools/Demos
1057-----------
1058
Antoine Pitrou8a681222009-02-07 17:13:31 +00001059- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
1060 and make it 2.6-compatible.
1061
Guilherme Poloa7d27972009-01-28 16:06:51 +00001062- Ttk demos added in Demo/tkinter/ttk/
1063
Antoine Pitrou2a013ea2008-12-27 20:39:28 +00001064- Issue #4677: add two list comprehension tests to pybench.
1065
Georg Brandlb1441c72009-01-03 22:33:39 +00001066
1067Build
1068-----
1069
Martin v. Löwis8482ef92009-05-05 16:14:30 +00001070- Issue #5847: Remove -n switch on "Edit with IDLE" menu item.
1071
Antoine Pitrou8966c992009-05-01 21:18:27 +00001072- Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
1073 linker, rather than always exit successfully. Patch by Floris Bruynooghe.
1074
Matthias Klose55708cc2009-04-30 08:06:49 +00001075- Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
1076 the order that backends for the dbm extension are checked.
1077
Matthias Klose906785c2009-02-22 23:18:38 +00001078- Link the shared python library with $(MODLIBS).
1079
Martin v. Löwis11f72102009-02-10 13:13:30 +00001080- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
1081
Martin v. Löwisbc186a82009-02-02 15:32:22 +00001082- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
1083
Martin v. Löwise97637d2009-01-11 09:45:11 +00001084- Issue #4895: Use _strdup on Windows CE.
1085
Georg Brandlb1441c72009-01-03 22:33:39 +00001086- Issue #4472: "configure --enable-shared" now works on OSX
1087
1088- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
1089
1090- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
1091
1092- Issue #4289: Remove Cancel button from AdvancedDlg.
1093
1094- Issue #1656675: Register a drop handler for .py* files on Windows.
1095
1096- Issue #4120: Exclude manifest from extension modules in VS2008.
1097
1098- Issue #4091: Install pythonxy.dll in system32 again.
1099
1100- Issue #4018: Disable "for me" installations on Vista.
1101
1102- Issue #3758: Add ``patchcheck`` build target to .PHONY.
1103
1104- Issue #4204: Fixed module build errors on FreeBSD 4.
1105
1106
1107C-API
1108-----
1109
Mark Dickinson21776072009-02-10 16:13:25 +00001110- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
1111 for negative arguments. Previously, it raised TypeError.
1112
Georg Brandlb1441c72009-01-03 22:33:39 +00001113- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
1114
1115- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
1116 the GIL is released, or owned by another thread.
1117
1118- Issue #4122: On Windows, fix a compilation error when using the
1119 Py_UNICODE_ISSPACE macro in an extension module.
1120
1121
Mark Dickinsone675f082008-12-11 21:56:00 +00001122Extension Modules
1123-----------------
1124
Gregory P. Smith365a1862009-02-12 07:35:29 +00001125- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
1126 supporting objects as input no matter how it was compiled (built in
1127 implementations or external openssl library).
1128
Mark Dickinson29500f62009-01-15 15:36:10 +00001129- Issue #4397: Fix occasional test_socket failure on OS X.
1130
Martin v. Löwisa9b54c72009-01-11 09:30:50 +00001131- Issue #4279: Fix build of parsermodule under Cygwin.
1132
Antoine Pitroubcd5cbe2009-01-08 21:17:16 +00001133- Issue #4751: hashlib now releases the GIL when hashing large buffers
1134 (with a hardwired threshold of 2048 bytes), allowing better parallelization
1135 on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.
1136
Martin v. Löwis5c88d812009-01-02 20:47:48 +00001137- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
1138
Antoine Pitrou31f30b12009-01-02 17:34:35 +00001139- Issue #4738: Each zlib object now has a separate lock, allowing to compress
1140 or decompress several streams at once on multi-CPU systems. Also, the GIL
1141 is now released when computing the CRC of a large buffer. Patch by ebfe.
1142
Georg Brandlb1441c72009-01-03 22:33:39 +00001143- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
1144
Martin v. Löwis05bfe1f2008-12-29 18:21:47 +00001145- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
1146
Mark Dickinsone675f082008-12-11 21:56:00 +00001147- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
1148 OpenBSD.
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +00001149
Antoine Pitrou3ad3a0d2008-12-18 17:08:32 +00001150- Issue #4583: array.array would not always prohibit resizing when a buffer
1151 has been exported, resulting in an interpreter crash when accessing the
1152 buffer.
1153
Martin v. Löwis841edad2008-11-30 10:36:49 +00001154
Jack Diederiche0cbd692009-04-01 04:27:09 +00001155- Issue #5228: Make functools.partial objects can now be pickled.
1156
Guilherme Polo9de29af2009-01-28 20:40:48 +00001157Tests
1158-----
1159
R. David Murraya21e4ca2009-03-31 23:16:50 +00001160- regrtest no longer treats ImportError as equivalent to SkipTest. Imports
Vinay Sajipad5fa2f2009-04-27 13:55:05 +00001161 that should cause a test to be skipped are now done using import_module
R. David Murraya21e4ca2009-03-31 23:16:50 +00001162 from test support, which does the conversion.
1163
Guilherme Polo9de29af2009-01-28 20:40:48 +00001164- Issue #5083: New 'gui' resource for regrtest.
1165
1166
Brett Cannon7317c1e2008-11-25 19:19:17 +00001167Docs
1168----
1169
Georg Brandl52b92cc2008-05-25 09:43:03 +00001170
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001171**(For information about older versions, consult the HISTORY file.)**