blob: 0c28db068531780bafec064df20bc1e86a6c0de3 [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
R. David Murraydd226ea2009-05-13 12:27:21 +000015- Issue #5994: the marshal module now has docstrings.
16
Mark Dickinsond1ec8b22009-05-11 15:45:15 +000017- Issue #5981: Fix three minor inf/nan issues in float.fromhex:
18 (1) inf and nan strings with trailing whitespace were incorrectly
19 rejected; (2) parsing of strings representing infinities and nans
20 was locale aware; and (3) the interpretation of fromhex('-nan')
21 didn't match that of float('-nan').
22
Benjamin Petersonaccdca52009-05-06 23:26:59 +000023Library
24-------
25
Antoine Pitrou2ca24f02009-05-14 21:30:46 +000026- Issue #1664: Make nntplib IPv6-capable. Patch by Derek Morr.
27
Antoine Pitroue4501852009-05-14 18:55:55 +000028- Issue #5006: Better handling of unicode byte-order marks (BOM) in the io
29 library. This means, for example, that opening an UTF-16 text file in
30 append mode doesn't add a BOM at the end of the file if the file isn't
31 empty.
32
R. David Murray74b89242009-05-13 17:33:03 +000033- Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
34 file is a binary. Patch by Brodie Rao, tests by Daniel Diniz. This fix
35 corrects a pydoc regression.
36
R. David Murray99352742009-05-07 18:24:38 +000037- Issue 5955: aifc's close method did not close the file it wrapped,
38 now it does. This also means getfp method now returns the real fp.
39
Benjamin Petersonaccdca52009-05-06 23:26:59 +000040
Brett Cannon1262e7c2009-05-11 01:47:11 +000041Tests
42-----
43
44- Issue 5442: Tests for importlib were not properly skipping case-sensitivity
45 tests on darwin even when the OS was installed on a case-sensitive
46 filesystem. Also fixed tests that should not be run when
47 sys.dont_write_bytecode is true.
48
49
Benjamin Petersonbd35b032009-04-04 23:16:41 +000050What's New in Python 3.1 beta 1?
51================================
52
Benjamin Peterson5c5f3de2009-05-06 20:43:28 +000053*Release date: 2009-05-06*
Benjamin Petersonbd35b032009-04-04 23:16:41 +000054
55Core and Builtins
56-----------------
57
Mark Dickinson865e01a2009-05-07 16:37:01 +000058- Issue #5914: Add new C API function PyOS_string_to_double, and
59 deprecate PyOS_ascii_strtod and PyOS_ascii_atof.
60
Eric Smith741191f2009-05-06 13:08:15 +000061- Issue #3382: float.__format__, complex.__format__, and %-formatting
62 no longer map 'F' to 'f'. Because of issue #5859 (below), this only
63 affects nan -> NAN and inf -> INF.
64
Mark Hammond5a607a32009-05-06 08:04:54 +000065- Issue #5799: ntpath (ie, os.path on Windows) fully supports UNC pathnames
66 in all operations, including splitdrive, split, etc. splitunc() now issues
67 a PendingDeprecation warning.
68
Eric Smith63376222009-05-05 14:04:18 +000069- Issue #5920: For float.__format__, change the behavior with the
70 empty presentation type (that is, not one of 'e', 'f', 'g', or 'n')
71 to be like 'g' but with at least one decimal point and with a
72 default precision of 12. Previously, the behavior the same but with
73 a default precision of 6. This more closely matches str(), and
74 reduces surprises when adding alignment flags to the empty
75 presentation type. This also affects the new complex.__format__ in
76 the same way.
77
Martin v. Löwis011e8422009-05-05 04:43:17 +000078- Implement PEP 383, Non-decodable Bytes in System Character Interfaces.
79
R. David Murrayb18500d2009-05-04 22:59:07 +000080- Issue #5890: in subclasses of 'property' the __doc__ attribute was
81 shadowed by classtype's, even if it was None. property now
82 inserts the __doc__ into the subclass instance __dict__.
83
Antoine Pitrou244651a2009-05-04 18:56:13 +000084- Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
85 sequences. Patch by Nick Barnes and Victor Stinner.
86
Martin v. Löwise0a2b722009-05-10 08:08:56 +000087- Issue #3672: Reject surrogates in utf-8 codec; add surrogatepass error handler.
Martin v. Löwisdb12d452009-05-02 18:52:14 +000088
Benjamin Petersond2e0c792009-05-01 20:40:59 +000089- Issue #5883: In the io module, the BufferedIOBase and TextIOBase ABCs have
90 received a new method, detach(). detach() disconnects the underlying stream
91 from the buffer or text IO and returns it.
92
Mark Dickinson33841c32009-05-01 15:37:04 +000093- Issue #5859: Remove switch from '%f' to '%g'-style formatting for
94 floats with absolute value over 1e50. Also remove length
95 restrictions for float formatting: '%.67f' % 12.34 and '%.120e' %
96 12.34 no longer raise an exception.
Mark Dickinsonf489caf2009-05-01 11:42:00 +000097
Eric Smith741191f2009-05-06 13:08:15 +000098- Issue #1588: Add complex.__format__. For example,
Eric Smith58a42242009-04-30 01:00:33 +000099 format(complex(1, 2./3), '.5') now produces a sensible result.
100
Mark Dickinsond3ca5572009-04-29 18:47:07 +0000101- Issue #5864: Fix empty format code formatting for floats so that it
102 never gives more than the requested number of significant digits.
103
Eric Smith6dc46f52009-04-27 20:39:49 +0000104- Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
105 new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.
106
Eric Smithcc32a112009-04-26 21:35:14 +0000107- Issue #5835: Deprecate PyOS_ascii_formatd.
108
Martin v. Löwis71efeb72009-04-26 01:02:07 +0000109- Issue #4971: Fix titlecase for characters that are their own
110 titlecase, but not their own uppercase.
111
Benjamin Peterson193152c2009-04-25 01:08:45 +0000112- Issue #5283: Setting __class__ in __del__ caused a segfault.
113
Mark Dickinsonad476da2009-04-23 19:14:16 +0000114- Issue #5816: complex(repr(z)) now recovers z exactly, even when
115 z involves nans, infs or negative zeros.
116
Mark Dickinson4a16e3a2009-04-23 19:15:48 +0000117- Issue #3166: Make int -> float conversions correctly rounded.
Mark Dickinsonc6300392009-04-20 21:38:00 +0000118
Mark Dickinsone6a076d2009-04-18 11:48:33 +0000119- Issue #1869 (and many duplicates): make round(x, n) correctly
120 rounded for a float x, by using the decimal <-> binary conversions
121 from Python/dtoa.c. As a consequence, (e.g.) round(x, 2) now
122 consistently agrees with format(x, '.2f').
123
Benjamin Petersonae937c02009-04-18 20:54:08 +0000124- Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
125 some builtin types.
126
Eric Smith0923d1d2009-04-16 20:16:10 +0000127- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'.
128
Eric Smith35e84722009-04-16 20:21:28 +0000129- Issue #5515: str.format() type 'n' combined with commas and leading
130 zeros no longer gives odd results with ints and floats.
Eric Smith0923d1d2009-04-16 20:16:10 +0000131
132- Implement PEP 378, Format Specifier for Thousands Separator, for
133 floats.
134
Mark Dickinson3370cce2009-04-17 22:40:53 +0000135- The str function switches to exponential notation at
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000136 1e11, not 1e12. This avoids printing 13 significant digits in
137 situations where only 12 of them are correct. Example problem
138 value: str(1e11 + 0.5). (This minor issue has existed in 2.x for a
139 long time.)
140
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000141- Issue #1580: On most platforms, use a 'short' float repr: for a
142 finite float x, repr(x) now outputs a string based on the shortest
143 sequence of decimal digits that rounds to x. Previous behaviour was
144 to output 17 significant digits and then strip trailing zeros.
Mark Dickinson3370cce2009-04-17 22:40:53 +0000145 Another minor difference is that the new repr switches to
146 exponential notation at 1e16 instead of the previous 1e17; this
147 avoids misleading output in some cases.
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000148
149 There's a new sys attribute sys.float_repr_style, which takes
150 the value 'short' to indicate that we're using short float repr,
151 and 'legacy' if the short float repr isn't available for one
152 reason or another.
153
154 The float repr change involves incorporating David Gay's 'perfect
155 rounding' code into the Python core (it's in Python/dtoa.c). As a
156 secondary consequence, all string-to-float and float-to-string
157 conversions (including all float formatting operations) will be
158 correctly rounded on these platforms.
159
160 See issue 1580 discussions for details of platforms for which
161 this change does not apply.
162
Benjamin Peterson2808d3c2009-04-15 21:34:27 +0000163- Issue #5759: float() didn't call __float__ on str subclasses.
164
Georg Brandlabc38772009-04-12 15:51:51 +0000165- The string.maketrans() function is deprecated; there is a new static method
166 maketrans() on the bytes and bytearray classes. This removes confusion about
167 the types string.maketrans() is supposed to work with, and mirrors the
168 methods available on the str class.
169
R. David Murraydc6da8a2009-04-09 22:16:43 +0000170- Issue #2170: refactored xml.dom.minidom.normalize, increasing both
171 its clarity and its speed.
172
Matthias Klose091c7b12009-04-07 13:24:27 +0000173- Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
174 to avoid compiler warnings.
175
Walter Dörwald8dc33d52009-05-06 14:41:26 +0000176- Issue #3739: The unicode-internal encoder now reports the number of characters
177 consumed like any other encoder (instead of the number of bytes).
178
Benjamin Peterson0b4915e2009-04-25 21:11:45 +0000179Installation
180------------
181
182- Issue #5756: Install idle and pydoc with a 3 suffix.
183
Benjamin Petersonbd35b032009-04-04 23:16:41 +0000184Library
185-------
186
Tarek Ziadédd9f65f2009-05-06 07:26:24 +0000187- Issue #5940: distutils.command.build_clib.check_library_list was not doing
188 the right type checkings anymore.
189
Thomas Heller00cfc372009-05-05 19:04:40 +0000190- Issue #4875: On win32, ctypes.util.find_library does no longer
191 return directories.
192
Georg Brandl243ad662009-05-05 09:00:19 +0000193- Issue #5142: Add the ability to skip modules while stepping to pdb.
194
Georg Brandl991f9202009-05-05 08:31:54 +0000195- Issue #1309567: Fix linecache behavior of stripping subdirectories when
196 looking for files given by a relative filename.
197
Georg Brandleaa84ef2009-05-05 08:14:33 +0000198- Issue #5923: Update the ``turtle`` module to version 1.1, add two new
199 turtle demos in Demo/turtle.
200
Antoine Pitrou3c33e082009-05-04 21:21:36 +0000201- Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
202 extracting a file to the root directory.
203
Hirokazu Yamamotobbb9be72009-05-04 05:56:46 +0000204- Issue #5913: os.listdir() should fail for empty path on windows.
205
Antoine Pitroua9f48a02009-05-02 21:41:14 +0000206- Issue #5084: unpickling now interns the attribute names of pickled objects,
207 saving memory and avoiding growth in size of subsequent pickles. Proposal
208 and original patch by Jake McGuire.
209
Benjamin Petersonc6b607d2009-05-02 12:36:44 +0000210- The json module now works exclusively with str and not bytes.
211
Gregory P. Smithe54dff52009-05-01 22:13:48 +0000212- Issue #3959: The ipaddr module has been added to the standard library.
213 Contributed by Google.
214
Antoine Pitrou7fff0962009-05-01 21:09:44 +0000215- Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
216 error when a named pipe is encountered, rather than blocking infinitely.
217
Raymond Hettinger1f0db402009-04-29 00:38:08 +0000218- Issue #5857: tokenize.tokenize() now returns named tuples.
219
Thomas Hellerc1edc2d2009-04-28 19:55:58 +0000220- Issue #4305: ctypes should now build again on mipsel-linux-gnu
221
Antoine Pitrou7a0fedf2009-04-27 22:31:40 +0000222- Issue #1734234: Massively speedup ``unicodedata.normalize()`` when the
223 string is already in normalized form, by performing a quick check beforehand.
224 Original patch by Rauli Ruohonen.
225
Antoine Pitrou57f3d932009-04-27 21:04:19 +0000226- Issue #5853: calling a function of the mimetypes module from several threads
227 at once could hit the recursion limit if the mimetypes database hadn't been
228 initialized before.
229
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000230- Issue #5854: Updated __all__ to include some missing names and remove some
231 names which should not be exported.
232
Thomas Heller34596a92009-04-24 20:50:00 +0000233- Issue #3102: All global symbols that the _ctypes extension defines
234 are now prefixed with 'Py' or '_ctypes'.
235
236- Issue #5041: ctypes does now allow pickling wide character.
237
Mark Dickinsond4d95f82009-04-24 14:06:19 +0000238- Issue #5812: For the two-argument form of the Fraction constructor,
239 Fraction(m, n), m and n are permitted to be arbitrary Rational
240 instances.
241
Mark Dickinsoncf63f2f2009-04-22 17:50:21 +0000242- Issue #5812: Fraction('1e6') is valid: more generally, any string
243 that's valid for float() is now valid for Fraction(), with the
244 exception of strings representing NaNs and infinities.
245
Antoine Pitroucf4c7492009-04-19 00:09:36 +0000246- Issue #5734: BufferedRWPair was poorly tested and had several glaring
247 bugs. Patch by Brian Quinlan.
248
R. David Murray9e94ddf2009-04-13 17:06:33 +0000249- Issue #1161031: fix readwrite select flag handling: POLLPRI now
250 results in a handle_expt_event call, not handle_read_event, and POLLERR
251 and POLLNVAL now call handle_close, not handle_expt_event. Also,
252 dispatcher now has an 'ignore_log_types' attribute for suppressing
253 log messages, which is set to 'warning' by default.
254
Matthias Klosea3d29e82009-04-07 13:13:10 +0000255- Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
256 new arguments introduced in 2.5.
257
Walter Dörwald1b08b302009-04-25 14:13:56 +0000258- Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
259 makeunicodedata.py and regenerated the Unicode database (This fixes
260 u'\u1d79'.lower() == '\x00').
261
Matthias Klose535336f2009-04-07 13:49:45 +0000262Extension Modules
263-----------------
264
Benjamin Petersone04b6272009-05-04 22:25:21 +0000265- Issue #5881: Remove old undocumented compatibility interfaces in hashlib and
266 pwd.
267
Mark Dickinsonea835e72009-04-19 20:40:33 +0000268- Issue #5463: In struct module, remove deprecated float coercion
269 for integer type codes: struct.pack('L', 0.3) should now raise
270 an error. The _PY_STRUCT_FLOAT_COERCE constant has been removed.
271 The version number has been bumped to 0.3.
272
Matthias Klose535336f2009-04-07 13:49:45 +0000273- Issue #5359: Readd the Berkley-DB detection code to allow _dbm be built
274 using Berkley-DB.
275
Nick Coghlan47384702009-04-22 16:13:36 +0000276Tests
277-----
278
279- Issue #5354: New test support function import_fresh_module() makes
280 it easy to import both normal and optimised versions of modules.
281 test_heapq and test_warnings have been adjusted to use it, tests for
282 other modules with both C and Python implementations in the stdlib
283 can be adjusted to use it over time.
284
Walter Dörwald4ba80132009-04-25 12:48:43 +0000285- Issue #5837: Certain sequences of calls to set() and unset() for
286 support.EnvironmentVarGuard objects restored the environment variables
287 incorrectly on __exit__.
288
Benjamin Petersonb173f782009-05-05 22:31:58 +0000289C-API
290-----
291
292- Issue #5630: A replacement PyCObject API, PyCapsule, has been added.
293
Benjamin Petersonbd35b032009-04-04 23:16:41 +0000294
Benjamin Petersond1735892009-03-07 18:46:21 +0000295What's New in Python 3.1 alpha 2?
296=================================
297
Benjamin Peterson88f14352009-04-04 21:06:52 +0000298*Release date: 2009-4-4*
Benjamin Petersond1735892009-03-07 18:46:21 +0000299
300Core and Builtins
301-----------------
Benjamin Petersone099b372009-04-04 17:09:35 +0000302
Eric Smith1e1d7d22009-04-03 22:25:33 +0000303- Implement PEP 378, Format Specifier for Thousands Separator, for
304 integers.
Benjamin Petersond1735892009-03-07 18:46:21 +0000305
Benjamin Peterson8f76b492009-04-03 22:22:42 +0000306- Issue #5666: Py_BuildValue's 'c' code should create byte strings.
307
Benjamin Peterson7fe98532009-04-02 00:33:55 +0000308- Issue #5499: The 'c' code for argument parsing functions now only accepts a
309 byte, and the 'C' code only accepts a unicode character.
310
Georg Brandl406b3d82009-04-11 21:24:37 +0000311- Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
312 when hitting the recursion limit under certain circumstances.
313
Brett Cannon0759dd62009-04-01 18:13:07 +0000314- Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.
315
Georg Brandlab6f2f62009-03-31 04:16:10 +0000316- Fix a segfault when running test_exceptions with coverage, caused by
317 insufficient checks in accessors of Exception.__context__.
318
Guido van Rossum0ad59d42009-03-30 22:01:35 +0000319- Issue #5604: non-ASCII characters in module name passed to
320 imp.find_module() were converted to UTF-8 while the path is
321 converted to the default filesystem encoding, causing nonsense.
322
Benjamin Peterson09832742009-03-26 17:15:46 +0000323- Issue #5126: str.isprintable() returned False for space characters.
324
Ronald Oussorenfa1fcd12009-03-30 23:16:10 +0000325- Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
326 the end sys.path, for compatibility with the system install of Python.
327
Antoine Pitrou3a652b12009-03-23 18:52:06 +0000328- Issue #4688: Add a heuristic so that tuples and dicts containing only
329 untrackable objects are not tracked by the garbage collector. This can
330 reduce the size of collections and therefore the garbage collection overhead
331 on long-running programs, depending on their particular use of datatypes.
332
Mark Dickinson17e4fdd2009-03-23 18:44:57 +0000333- Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
334 improve its performance. Long divisions and remainder operations
335 are now between 50% and 150% faster.
336
Mark Dickinsonbd792642009-03-18 20:06:12 +0000337- Issue #4258: Make it possible to use base 2**30 instead of base
338 2**15 for the internal representation of integers, for performance
339 reasons. Base 2**30 is enabled by default on 64-bit machines. Add
340 --enable-big-digits option to configure, which overrides the
341 default. Add sys.int_info structseq to provide information about
342 the internal format.
343
Mark Dickinson081dfee2009-03-18 14:47:41 +0000344- Issue #4474: PyUnicode_FromWideChar now converts characters outside
345 the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
346 and sizeof(Py_UNICODE) == 2.
347
Eric Smith8ec90442009-03-14 12:29:34 +0000348- Issue #5237: Allow auto-numbered fields in str.format(). For
349 example: '{} {}'.format(1, 2) == '1 2'.
350
Antoine Pitrou652e7072009-03-13 19:25:20 +0000351- Issue #5392: when a very low recursion limit was set, the interpreter would
352 abort with a fatal error after the recursion limit was hit twice.
353
Matthias Klose042f1332009-04-04 14:32:42 +0000354- Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
355 short file names.
356
Benjamin Petersond1735892009-03-07 18:46:21 +0000357Library
358-------
359
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000360- Issue #2625: added missing items() call to the for loop in
R. David Murray548ac412009-04-02 19:44:43 +0000361 mailbox.MH.get_message().
362
Hye-Shik Chang944820b2009-04-02 10:33:16 +0000363- Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
364 error substitutions from non-strict codec error callbacks in
365 incrementalencoder and StreamWriter.
366
Georg Brandl33c28812009-04-01 23:07:29 +0000367- Issue #5656: Fix the coverage reporting when running the test suite with
368 the -T argument.
369
Raymond Hettinger3f10a952009-04-01 19:05:50 +0000370- Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.
371
Georg Brandl4ed72ac2009-04-01 04:28:33 +0000372- Issue #5624: Fix the _winreg module name still used in several modules.
373
Benjamin Petersona1b49012009-03-31 23:11:32 +0000374- Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.
375
Jesse Nollera9314042009-03-31 22:36:44 +0000376- Issue #5619: Multiprocessing children disobey the debug flag and causes
377 popups on windows buildbots. Patch applied to work around this issue.
378
Jesse Noller32d68c22009-03-31 18:48:42 +0000379- Issue #5400: Added patch for multiprocessing on netbsd compilation/support
380
Hirokazu Yamamoto16caab02009-03-31 13:44:06 +0000381- Issue #5387: Fixed mmap.move crash by integer overflow.
382
Jesse Nollerf8d00852009-03-31 03:25:07 +0000383- Issue #5261: Patch multiprocessing's semaphore.c to support context
384 manager use: "with multiprocessing.Lock()" works now.
385
Brett Cannon7f6b4f82009-03-30 21:30:26 +0000386- Issue #5236: Change time.strptime() to only take strings. Didn't work with
387 bytes already but the failure was non-obvious.
388
Jesse Noller7af4ef82009-03-30 16:47:15 +0000389- Issue #5177: Multiprocessing's SocketListener class now uses
390 socket.SO_REUSEADDR on all connections so that the user no longer needs
391 to wait 120 seconds for the socket to expire.
392
Benjamin Peterson48e24782009-03-29 13:02:52 +0000393- Issue #5595: Fix UnboundedLocalError in ntpath.ismount().
394
Antoine Pitrou66994e12009-03-29 00:45:26 +0000395- Issue #1174606: Calling read() without arguments of an unbounded file
396 (typically /dev/zero under Unix) could crash the interpreter.
397
Benjamin Peterson59406a92009-03-26 17:10:29 +0000398- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
399 io.BufferedRandom have been deprecated for removal in Python 3.2.
400
Lars Gustäbel42e00912009-03-22 20:34:29 +0000401- Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
402 forever on incomplete input. That caused tarfile.open() to hang when used
403 with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
404 partial bzip2 compressed data.
405
Mark Dickinson79f52032009-03-17 23:12:51 +0000406- Issue #2110: Add support for thousands separator and 'n' type
407 specifier to Decimal.__format__
408
Mark Dickinson9c59fe02009-03-17 18:15:08 +0000409- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
410 '>' alignment characters.
411
Antoine Pitrou0ae29cf2009-03-13 22:33:17 +0000412- The error detection code in FileIO.close() could fail to reflect the `errno`
413 value, and report it as -1 instead.
414
Antoine Pitroua28fcfd2009-03-13 23:42:55 +0000415- Issue #5016: FileIO.seekable() could return False if the file position
416 was negative when truncated to a C int. Patch by Victor Stinner.
417
Mark Dickinsonae681df2009-03-21 10:26:31 +0000418Extension Modules
419-----------------
420
Benjamin Petersone099b372009-04-04 17:09:35 +0000421- Issue #5391: mmap now deals exclusively with bytes.
422
Mark Dickinsonae681df2009-03-21 10:26:31 +0000423- Issue #5463: In struct module, remove deprecated overflow wrapping
424 when packing an integer: struct.pack('=L', -1) now raises
Mark Dickinsonb40b9472009-03-29 16:58:21 +0000425 struct.error instead of returning b'\xff\xff\xff\xff'. The
426 _PY_STRUCT_RANGE_CHECKING and _PY_STRUCT_OVERFLOW_MASKING constants
427 have been removed from the struct module.
Mark Dickinsonae681df2009-03-21 10:26:31 +0000428
Benjamin Petersond1735892009-03-07 18:46:21 +0000429
Benjamin Petersona58a6262009-03-07 16:34:40 +0000430What's New in Python 3.1 alpha 1
Barry Warsaw97f005d2008-12-03 16:46:14 +0000431================================
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000432
Benjamin Petersona58a6262009-03-07 16:34:40 +0000433*Release date: 2009-03-07*
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000434
435Core and Builtins
436-----------------
437
Benjamin Peterson4fa88fa2009-03-04 00:14:51 +0000438- The io module has been reimplemented in C for speed.
439
Raymond Hettingerb0d56af2009-03-03 10:52:49 +0000440- Give dict views an informative __repr__.
441
Eric Smith5e5c0db2009-02-20 14:25:03 +0000442- Issue #5247: Improve error message when unknown format codes are
443 used when using str.format() with str, int, and float arguments.
444
Hirokazu Yamamoto575d1332009-02-16 09:13:20 +0000445- Issue #5249: time.strftime returned malformed string when format string
446 contained non ascii character on windows.
447
Benjamin Petersonf5b52242009-03-02 23:31:26 +0000448- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
449 source has already been decoded into str.
450
Antoine Pitrou79eee6b2009-02-13 14:01:05 +0000451- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
452 rotating the object pointer by 4 bits to the right.
453
Mark Dickinson87ec0852009-02-09 17:15:59 +0000454- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
455 it now forces its argument to double before testing for infinity.
456
Benjamin Petersonee1ae7c2009-02-08 21:07:20 +0000457- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
458 returns a non-number type.
459
Benjamin Peterson87618552009-02-08 15:00:52 +0000460- Issue #5182: Removed memoryview.__str__.
461
Mark Dickinsonc008a172009-02-01 13:59:22 +0000462- Issue #1717: Removed builtin cmp() function, dropped tp_compare
463 slot, the C API functions PyObject_Compare and PyUnicode_Compare and
Mark Dickinsone94c6792009-02-02 20:36:42 +0000464 the type definition cmpfunc. The tp_compare slot has been renamed
465 to tp_reserved, and is reserved for future usage.
Mark Dickinsonf02e0aa2009-02-01 12:13:56 +0000466
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000467- Issue #1242657: the __len__() and __length_hint__() calls in several tools
Raymond Hettingere8364232009-02-02 22:55:09 +0000468 were suppressing all exceptions. These include list() and bytearray().
469
Mark Dickinson1124e712009-01-28 21:25:58 +0000470- Issue #4707: round(x, n) now returns an integer if x is an integer.
471 Previously it returned a float.
472
Antoine Pitroub52ec782009-01-25 16:34:23 +0000473- Issue #4753: By enabling a configure option named '--with-computed-gotos'
474 on compilers that support it (notably: gcc, SunPro, icc), the bytecode
475 evaluation loop is compiled with a new dispatch mechanism which gives
476 speedups of up to 20%, depending on the system, on various benchmarks.
477
Antoine Pitrou81fabdb2009-01-22 10:11:36 +0000478- Issue #4874: Most builtin decoders now reject unicode input.
479
Mark Dickinson9ffc0202009-01-20 20:45:53 +0000480- Issue #4842: Don't allow trailing 'L' when constructing an integer
481 from a string.
482
Benjamin Peterson05e782f2009-01-19 15:15:02 +0000483- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.
484
Antoine Pitroue4bc7f62009-01-17 21:06:43 +0000485- Issue #4838: When a module is deallocated, free the memory backing the
486 optional module state data.
487
Mark Dickinson8055afd2009-01-17 10:04:45 +0000488- Issue #4910: Rename nb_long slot to nb_reserved, and change its
489 type to (void *).
490
Antoine Pitrou8d4e5052009-01-13 22:59:11 +0000491- Issue #4935: The overflow checking code in the expandtabs() method common
492 to str, bytes and bytearray could be optimized away by the compiler, letting
493 the interpreter segfault instead of raising an error.
494
Amaury Forgeot d'Arcf343e012009-01-12 23:58:21 +0000495- Issue #3720: Fix a crash when an iterator modifies its class and removes its
496 __next__ method.
497
Mark Dickinsone5e298f2009-01-12 20:49:19 +0000498- Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
499 function no longer attempt to call the __long__ slot to convert an object
500 to an integer. Only the __int__ and __trunc__ slots are examined.
501
Martin v. Löwis7c2b66c2009-01-12 08:21:03 +0000502- Issue #4893: Use NT threading on CE.
503
Martin v. Löwisec59d042009-01-12 07:59:10 +0000504- Issue #4915: Port sysmodule to Windows CE.
505
Antoine Pitrouab868312009-01-10 15:40:25 +0000506- Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
507 common cases are optimized thanks to a dedicated fast path and a moderate
508 amount of loop unrolling.
509
Antoine Pitrou14b78f52009-01-09 22:27:08 +0000510- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
511 collecting the oldest generation) so that allocating lots of objects without
512 destroying them does not show quadratic performance. Based on a proposal by
513 Martin von Löwis at
514 http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
515
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000516- Issue #4604: Some objects of the I/O library could still be used after
Antoine Pitrou8043cf82009-01-09 19:54:29 +0000517 having been closed (for instance, a read() call could return some
518 previously buffered data). Patch by Dmitry Vasiliev.
519
Antoine Pitrou05608432009-01-09 18:53:14 +0000520- Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
521 flag to work properly. Furthermore, when specifying -u, the text stdout
522 and stderr streams have line-by-line buffering enabled (the default being
523 to buffer arbitrary chunks of data).
524
Raymond Hettinger35631532009-01-09 03:58:09 +0000525- The internal table, _PyLong_DigitValue, is now an array of unsigned chars
526 instead of ints (reducing its size from 4 to 8 times thereby reducing
527 Python's overall memory).
528
Antoine Pitroud35cbf62009-01-06 19:02:24 +0000529- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
530 an existing .py counterpart, override the co_filename attributes of all
531 code objects if the original filename is obsolete (which can happen if the
532 file has been renamed, moved, or if it is accessed through different paths).
533 Patch by Ziga Seilnacht and Jean-Paul Calderone.
534
Antoine Pitrouc3b39242009-01-03 16:59:18 +0000535- Issue #4580: Fix slicing of memoryviews when the item size is greater than
536 one byte. Also fixes the meaning of len() so that it returns the number of
537 items, rather than the size in bytes.
538
Martin v. Löwis5c88d812009-01-02 20:47:48 +0000539- Issue #4075: Use OutputDebugStringW in Py_FatalError.
540
Amaury Forgeot d'Arc374e2202009-01-01 23:05:36 +0000541- Issue #4747: When the terminal does not use utf-8, executing a script with
542 non-ascii characters in its name could fail with a "SyntaxError: None" error.
543
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000544- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
Hirokazu Yamamoto8ed9a802009-01-01 16:09:52 +0000545 file with `bytes' filename on Windows.
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000546
Antoine Pitrou7ddda782009-01-01 15:35:33 +0000547- Issue #3680: Reference cycles created through a dict, set or deque iterator
548 did not get collected.
549
Nick Coghlanf1f2f682008-12-30 07:29:12 +0000550- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
551 where the tp_hash and tp_dict slots are both NULL.
552
Georg Brandlccc47b62008-12-28 11:44:14 +0000553- Issue #4759: None is now allowed as the first argument of
554 bytearray.translate(). It was always allowed for bytes.translate().
555
Skip Montanaro80072cb2008-12-23 03:51:14 +0000556- Added test case to ensure attempts to read from a file opened for writing
557 fail.
558
Antoine Pitrou51f3ef92008-12-20 13:14:23 +0000559- Issue #3106: Speedup some comparisons (str/str and int/int).
560
Antoine Pitrouf289ae62008-12-18 11:06:25 +0000561- Issue #2183: Simplify and optimize bytecode for list, dict and set
562 comprehensions. Original patch for list comprehensions by Neal Norwitz.
563
Antoine Pitrou621601a2008-12-17 23:18:19 +0000564- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
565 print elapsed times, not only when some objects are uncollectable /
566 unreachable. Original patch by Neil Schemenauer.
567
Mark Dickinson54bc1ec2008-12-17 16:19:07 +0000568- Issue #3439: Add a bit_length method to int.
569
Mark Dickinsonda2706b2008-12-11 18:03:03 +0000570- Issue #2173: When getting device encoding, check that return value of
571 nl_langinfo is not the empty string. This was causing silent build
572 failures on OS X.
573
Jeffrey Yasskinb9083f32008-12-11 06:18:33 +0000574- Issue #4597: Fixed several opcodes that weren't always propagating
575 exceptions.
576
577- Issue #4589: Fixed exception handling when the __exit__ function of a
Amaury Forgeot d'Arc10b24e82008-12-10 23:49:33 +0000578 context manager returns a value that cannot be converted to a bool.
579
Mark Dickinsonfd24b322008-12-06 15:33:31 +0000580- Issue #4445: Replace "sizeof(PyBytesObject)" with
581 "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
582 bytes instances. On a typical machine this saves 3 bytes of memory
583 (on average) per allocation of a bytes instance.
584
Christian Heimesa872de52008-12-05 08:26:55 +0000585- Issue #4533: File read operation was dreadfully slow due to a slowly
586 growing read buffer. Fixed by using the same growth rate algorithm as
587 Python 2.x.
588
Antoine Pitrou5504e892008-12-06 21:27:53 +0000589- Issue #4509: Various issues surrounding resize of bytearray objects to
590 which there are buffer exports (e.g. memoryview instances).
591
Georg Brandlf9734072008-12-07 15:30:06 +0000592- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
593 method on file objects with closefd=False. The file descriptor is still
594 kept open but the file object behaves like a closed file. The ``FileIO``
595 object also got a new readonly attribute ``closefd``.
Matthias Klose7e1b8fa2008-11-26 17:22:04 +0000596
Antoine Pitroubc420402008-12-07 20:14:49 +0000597- Issue #4569: Interpreter crash when mutating a memoryview with an item size
598 larger than 1.
599
Benjamin Peterson371ccfb2008-12-27 19:03:36 +0000600- Issue #4748: Lambda generators no longer return a value.
601
Gregory P. Smithccc5ae72009-03-02 05:21:55 +0000602- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
603
Walter Dörwaldc1651a02009-05-03 22:55:55 +0000604- Issue #5108: Handle %s like %S, %R and %A in PyUnicode_FromFormatV(): Call
605 PyUnicode_DecodeUTF8() once, remember the result and output it in a second
606 step. This avoids problems with counting UTF-8 bytes that ignores the effect
607 of using the replace error handler in PyUnicode_DecodeUTF8().
608
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000609Library
610-------
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000611
Tarek Ziadé4210c6e2009-05-14 20:20:47 +0000612- Issue #6022: a test file was created in the current working directory by
613 test_get_outputs in Distutils.
614
Tarek Ziadéff0e5002009-05-12 17:14:01 +0000615- Issue #5977: distutils build_ext.get_outputs was not taking into account the
616 inplace option. Initial patch by kxroberto.
617
Tarek Ziadé06fbee12009-05-10 10:34:01 +0000618- Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
619 for old-style extensions.
620
Tarek Ziadébe5b1b92009-05-09 10:09:11 +0000621- Issue #5976: Fixed Distutils test_check_environ.
622
Tarek Ziadé5662d3e2009-05-07 21:24:43 +0000623- Issue #5941: Distutils build_clib command was not working anymore because
624 of an incomplete costumization of the archiver command. Added ARFLAGS in the
625 Makefile besides AR and make Distutils use it. Original patch by David
626 Cournapeau.
627
R. David Murrayb507d2e2009-04-29 15:34:32 +0000628- Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.
629
Tarek Ziadé81623822009-04-29 08:07:44 +0000630- Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
631 anymore.
632
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000633- Issue #5810: Fixed Distutils test_build_scripts so it uses
Tarek Ziadé939f9c82009-04-25 12:53:56 +0000634 sysconfig.get_config_vars.
635
Tarek Ziadé23336082009-04-25 12:39:56 +0000636- Issue #4951: Fixed failure in test_httpservers.
637
Thomas Hellerd3cfe992009-04-24 20:10:24 +0000638- Issue #5795: Fixed test_distutils failure on Debian ppc.
639
Tarek Ziadé822e1d42009-04-13 12:37:57 +0000640- Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.
641
Georg Brandl1f9fa312009-04-27 16:42:58 +0000642- Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
643 a value in SafeConfigParser.
644
Tarek Ziadéf396ecf2009-04-11 15:00:43 +0000645- Issue #5732: added a new command in Distutils: check.
646
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000647- Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
Tarek Ziadéa6191802009-04-09 22:02:39 +0000648 platforms. Initial patch by Paul Moore.
649
Tarek Ziadéf6370502009-04-05 22:57:21 +0000650- Issue #5095: Added bdist_msi to the list of bdist supported formats.
651 Initial fix by Steven Bethard.
652
Tarek Ziadé889b0aa2009-04-05 21:49:36 +0000653- Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
654 Initial fix by Wayne Davison.
655
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000656- Issue #5694: removed spurious test output in Distutils (test_clean).
Tarek Ziadéea261632009-04-05 18:33:34 +0000657
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000658- Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
Georg Brandl236f7972009-04-05 14:28:42 +0000659
Brett Cannonf47e84c2009-04-01 16:06:01 +0000660- Issue #1665206 (partially): Move imports in cgitb to the top of the module
661 instead of performing them in functions. Helps prevent import deadlocking in
662 threads.
663
R. David Murraye59482e2009-04-01 03:42:00 +0000664- Issue #2522: locale.format now checks its first argument to ensure it has
665 been passed only one pattern, avoiding mysterious errors where it appeared
666 that it was failing to do localization.
667
Tarek Ziadéb2e36f12009-03-31 22:37:55 +0000668- Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
669 Brandl.
670
Antoine Pitrou350370c2009-03-14 00:13:13 +0000671- Issue #1222: locale.format() bug when the thousands separator is a space
672 character.
673
Tarek Ziadé516db942009-03-11 12:52:00 +0000674- Issue #5472: Fixed distutils.test_util tear down. Original patch by
675 Tim Golden.
676
Raymond Hettinger5bb0f0e2009-03-10 12:56:32 +0000677- collections.deque() objects now have a read-only attribute called maxlen.
678
Guilherme Polof45b4cc2009-03-07 02:19:14 +0000679- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
680 it is has been populated and properly configured in order to prevent
681 window flashing.
682
Guilherme Polo56f5be52009-03-07 01:54:57 +0000683- Issue #4792: Prevent a segfault in _tkinter by using the
684 guaranteed to be safe interp argument given to the PythonCmd in place of
685 the Tcl interpreter taken from a PythonCmd_ClientData.
686
687- Issue #5193: Guarantee that tkinter.Text.search returns a string.
688
Tarek Ziadé63b64c02009-03-07 00:51:53 +0000689- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
690 Original patch by Akira Kitada.
691
Hirokazu Yamamoto54d0df62009-03-06 03:04:07 +0000692- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.
693
Hirokazu Yamamoto8e722bc2009-03-05 14:33:01 +0000694- Issue #5385: Fixed mmap crash after resize failure on windows.
695
Hirokazu Yamamoto0c988172009-03-03 22:41:26 +0000696- Issue #5179: Fixed subprocess handle leak on failure on windows.
697
Raymond Hettinger2d32f632009-03-02 21:24:57 +0000698- PEP 372: Added collections.OrderedDict().
699
Raymond Hettingera4f52b12009-03-02 22:28:31 +0000700- The _asdict() for method for namedtuples now returns an OrderedDict().
701
Raymond Hettinger0663a1e2009-03-02 23:06:00 +0000702- configparser now defaults to using an ordered dictionary.
703
Benjamin Petersone0124bd2009-03-09 21:04:33 +0000704- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
705 import guess_extension`` was used.
706
Hirokazu Yamamoto10c99372009-02-28 12:21:53 +0000707- Issue #1733986: Fixed mmap crash in accessing elements of second map object
708 with same tagname but larger size than first map. (Windows)
709
Hirokazu Yamamoto39c6dea2009-02-28 10:56:50 +0000710- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
711 overrun.
712
Tarek Ziadéf0721222009-02-28 10:16:43 +0000713- Issue #1533164: Installed but not listed *.pyo was breaking Distutils
714 bdist_rpm command.
715
716- Issue #5378: added --quiet option to Distutils bdist_rpm command.
717
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000718- Issue #5052: make Distutils compatible with 2.3 again.
719
Tarek Ziadé0f31e6d2009-02-25 22:31:38 +0000720- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
721 in Distutils tests.
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000722
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000723- Issue #5287: Add exception handling around findCaller() call to help out
724 IronPython.
725
Hirokazu Yamamoto0654ccd2009-02-18 16:38:00 +0000726- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
727 The file was resized to wrong size.
728
729- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
730
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000731- Issue #2279: distutils.sdist.add_defaults now add files
Tarek Ziadé0d0506e2009-02-16 21:49:12 +0000732 from the package_data and the data_files metadata.
733
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000734- Issue #5257: refactored all tests in distutils, so they use
Tarek Ziadéc1375d52009-02-14 14:35:51 +0000735 support.TempdirManager, to avoid writing in the tests directory.
736
Tarek Ziadé68c50952009-02-13 23:04:17 +0000737- Issue #4524: distutils build_script command failed with --with-suffix=3.
738 Initial patch by Amaury Forgeot d'Arc.
739
Tarek Ziadé811d6242009-02-13 22:26:15 +0000740- Issue #2461: added tests for distutils.util
741
Mark Dickinsonc28ad272009-02-12 17:58:36 +0000742- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
743 which inherited from numbers.py which did not have __slots__ defined. The
744 numbers hierarchy now has its own __slots__ declarations.
745
Antoine Pitroub353c122009-02-11 00:39:14 +0000746- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
747 encoding.
748
Thomas Heller465c8022009-02-10 18:59:04 +0000749- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
750 function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
751
Tarek Ziadé7d5e9872009-02-10 12:36:33 +0000752- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
753 under NT and OS2. Patch by Philip Jenvey.
754
Brett Cannonbefb14f2009-02-10 02:10:16 +0000755- Issue #5128: Make compileall properly inspect bytecode to determine if needs
756 to be recreated. This avoids a timing hole thanks to the old reliance on the
757 ctime of the files involved.
758
Guilherme Polob681df42009-02-09 22:33:59 +0000759- Issue #5122: Synchronize tk load failure check to prevent a potential
760 deadlock.
761
Benjamin Petersona86f2c02009-02-10 02:41:10 +0000762- Issue #1818: collections.namedtuple() now supports a keyword argument
763 'rename' which lets invalid fieldnames be automatically converted to
764 positional names in the form, _1, _2, ...
765
Guilherme Poloae098992009-02-09 16:44:24 +0000766- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
767
Nick Coghlan9a1d6e32009-02-08 03:37:27 +0000768- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
769 public documented method ``ZipImporter.get_filename()``.
770
Nick Coghlan3f48ae32009-02-08 01:58:26 +0000771- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
772 the execution of packages by looking for and executing a ``__main__``
773 submodule when a package name is supplied. Initial patch by Andi
774 Vajda.
775
Guilherme Polo491aee22009-02-06 23:16:11 +0000776- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
777 not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
778 Tkapp_Call when calling from a thread different than the one that created
779 the Tcl interpreter. Patch by Robert Hancock.
780
Eric Smith0e5b5622009-02-06 01:32:42 +0000781- Issue #4285: Change sys.version_info to be a named tuple. Patch by
782 Ross Light.
783
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000784- Issue #1520877: Now distutils.sysconfig reads $AR from the
Tarek Ziadéd3409de2009-02-06 01:18:36 +0000785 environment/Makefile. Patch by Douglas Greiman.
786
Tarek Ziadé70a74eb2009-02-06 00:38:35 +0000787- Issue #1276768: The verbose option was not used in the code of
788 distutils.file_util and distutils.dir_util.
789
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000790- Issue #5132: Fixed trouble building extensions under Solaris with
Tarek Ziadé5874ef12009-02-05 22:56:14 +0000791 --enabled-shared activated. Initial patch by Dave Peterson.
792
Guilherme Polo7f423952009-02-02 21:17:09 +0000793- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
794
Raymond Hettinger85602262009-02-03 04:19:10 +0000795- The shelve module now defaults to pickle protocol 3.
796
Brett Cannone61426e2009-01-30 01:31:34 +0000797- Fix a bug in the trace module where a bytes object from co_lnotab had its
798 items being passed through ord().
799
Antoine Pitrou0dcc3cd2009-01-29 20:26:59 +0000800- Issue #2047: shutil.move() could believe that its destination path was
801 inside its source path if it began with the same letters (e.g. "src" vs.
802 "src.new").
803
Guilherme Polo5f238482009-01-28 14:41:10 +0000804- Added the ttk module. See issue #2983: Ttk support for Tkinter.
805
Raymond Hettinger89e12962009-01-26 02:09:03 +0000806- Removed isSequenceType(), isMappingType, and isNumberType() from the
807 operator module; use the abstract base classes instead. Also removed
808 the repeat() function; use mul() instead.
809
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000810- Issue #5021: doctest.testfile() did not create __name__ and
Raymond Hettinger0f055172009-01-27 10:06:09 +0000811 collections.namedtuple() relied on __name__ being defined.
812
813- Backport importlib from Python 3.1. Only the import_module() function has
814 been backported to help facilitate transitions from 2.7 to 3.1.
815
Tarek Ziadé0302cf52009-01-26 17:23:20 +0000816- Issue #1885: distutils. When running sdist with --formats=tar,gztar
817 the tar file was overriden by the gztar one.
818
Tarek Ziadé4d4456f2009-01-25 18:27:45 +0000819- Issue #4863: distutils.mwerkscompiler has been removed.
820
Raymond Hettingerd07d9392009-01-27 04:20:44 +0000821- Added a new itertools functions: combinations_with_replacement()
822 and compress().
Raymond Hettinger6b3b0fc2009-01-26 02:56:58 +0000823
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000824- Issue #5032: added a step argument to itertools.count() and
Raymond Hettinger30729212009-02-12 06:28:27 +0000825 allowed non-integer arguments.
826
Jesse Noller41faa542009-01-25 03:45:53 +0000827- Fix and properly document the multiprocessing module's logging
828 support, expose the internal levels and provide proper usage
829 examples.
830
Mark Dickinsoncddcf442009-01-24 21:46:33 +0000831- Issue #1672332: fix unpickling of subnormal floats, which was
832 producing a ValueError on some platforms.
833
Martin v. Löwisacbf4612009-01-24 16:19:45 +0000834- Issue #3881: Help Tcl to load even when started through the
835 unreadable local symlink to "Program Files" on Vista.
836
Martin v. Löwis59e47792009-01-24 14:10:07 +0000837- Issue #4710: Extract directories properly in the zipfile module;
838 allow adding directories to a zipfile.
839
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000840- Issue #3807: _multiprocessing build fails when configure is passed
Jesse Noller6fd47e22009-01-23 14:09:08 +0000841 --without-threads argument. When this occurs, _multiprocessing will
842 be disabled, and not compiled.
843
Antoine Pitrou08838b62009-01-21 00:55:13 +0000844- Issue #5008: When a file is opened in append mode with the new IO library,
845 do an explicit seek to the end of file (so that e.g. tell() returns the
846 file size rather than 0). This is consistent with the behaviour of the
847 traditional 2.x file object.
848
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000849- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
850 parameter was set.
851
Mark Dickinson8dd05142009-01-20 20:43:58 +0000852- Issue #4842: Always append a trailing 'L' when pickling longs using
853 pickle protocol 0. When reading, the 'L' is optional.
854
Brett Cannonafccd632009-01-20 02:21:27 +0000855- Add the importlib package.
856
Jesse Noller9a0fc972009-01-18 21:12:58 +0000857- Issue #4301: Patch the logging module to add processName support, remove
858 _check_logger_class from multiprocessing.
859
Jesse Noller1cbb17a2009-01-18 19:45:18 +0000860- Issue #3325: Remove python2.x try: except: imports for old cPickle from
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000861 multiprocessing.
Jesse Nollerf70a5382009-01-18 19:44:02 +0000862
Benjamin Peterson9953a8d2009-01-17 04:15:01 +0000863- Issue #4959: inspect.formatargspec now works for keyword only arguments
864 without defaults.
865
Jesse Noller6214edd2009-01-19 16:23:53 +0000866- Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
867 for *nix machines for negative handles and large int handles. Without this check
868 it is possible to segfault the interpreter.
869
Jesse Nollerb0516a62009-01-18 03:11:38 +0000870- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
871 in sharedctypes.py.
872
873- Issue #1225107: inspect.isclass() returned True for instances with a custom
874 __getattr__.
875
Gregory P. Smithde3369f2009-01-12 04:50:11 +0000876- Issue #3826 and #4791: The socket module now closes the underlying socket
877 appropriately when it is being used via socket.makefile() objects
878 rather than delaying the close by waiting for garbage collection to do it.
879
Raymond Hettingerb8baf632009-01-14 02:20:07 +0000880- Issue #1696199: Add collections.Counter() for rapid and convenient
881 counting.
882
Antoine Pitrou308705e2009-01-10 16:22:51 +0000883- Issue #3860: GzipFile and BZ2File now support the context manager protocol.
884
Thomas Heller5e4e4272009-01-08 09:34:20 +0000885- Issue #4867: Fixed a crash in ctypes when passing a string to a
886 function without defining argtypes.
887
Antoine Pitrou42db3ef2009-01-04 21:37:59 +0000888- Issue #4272: Add an optional argument to the GzipFile constructor to override
889 the timestamp in the gzip stream. The default value remains the current time.
890 The information can be used by e.g. gunzip when decompressing. Patch by
891 Jacques Frechet.
892
Mark Dickinson315a20a2009-01-04 21:34:18 +0000893- Restore Python 2.3 compatibility for decimal.py.
894
Guilherme Polo3f5f8222009-01-03 22:00:39 +0000895- Issue #3638: Remove functions from _tkinter module level that depend on
896 TkappObject to work with multiple threads.
897
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000898- Issue #4718: Adapt the wsgiref package so that it actually works with
899 Python 3.x, in accordance with the `official amendments of the spec
Antoine Pitrou38a66ad2009-01-03 18:41:49 +0000900 <http://www.wsgi.org/wsgi/Amendments_1.0>`_.
901
Raymond Hettinger771ed762009-01-03 19:20:32 +0000902- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
903 to the decimal module.
904
Georg Brandl3a9b0622009-01-03 22:07:57 +0000905- Fractions.from_float() no longer loses precision for integers too big to
906 cast as floats.
907
Mark Dickinsonf9236412009-01-02 23:23:21 +0000908- Issue #4812: add missing underscore prefix to some internal-use-only
909 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
910
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000911- Issue #4790: The nsmallest() and nlargest() functions in the heapq module
Georg Brandl3a9b0622009-01-03 22:07:57 +0000912 did unnecessary work in the common case where no key function was specified.
913
Georg Brandlb1441c72009-01-03 22:33:39 +0000914- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
915 the function is not a generator.
916
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000917- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
918 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
Tarek Ziadé9df8ce32008-12-30 23:09:20 +0000919
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000920- Issue #4646: distutils was choking on empty options arg in the setup
Tarek Ziadé4450dcf2008-12-29 22:38:38 +0000921 function. Original patch by Thomas Heller.
922
Martin v. Löwis1f1620e2008-12-29 16:27:13 +0000923- Issue #3767: Convert Tk object to string in tkColorChooser.
924
Martin v. Löwise354d782008-12-29 16:03:04 +0000925- Issue #3248: Allow placing ScrolledText in a PanedWindow.
926
Antoine Pitrou5acd41e2008-12-28 14:29:00 +0000927- Issue #4444: Allow assertRaises() to be used as a context handler, so that
928 the code under test can be written inline if more practical.
929
Georg Brandldb7b6b92009-01-01 15:53:14 +0000930- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
931 works as expected in the interactive environment.
932
Antoine Pitroudb5fe662008-12-27 15:50:40 +0000933- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
934 Gabriel Genellina.
935
Antoine Pitrou180a3362008-12-14 16:36:46 +0000936- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
937 boundary.
938
Nick Coghlanf088e5e2008-12-14 11:50:48 +0000939- Issue #4223: inspect.getsource() will now correctly display source code
940 for packages loaded via zipimport (or any other conformant PEP 302
941 loader). Original patch by Alexander Belopolsky.
942
943- Issue #4201: pdb can now access and display source code loaded via
944 zipimport (or any other conformant PEP 302 loader). Original patch by
945 Alexander Belopolsky.
946
947- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
948 302 conformant loader) will now work correctly in most cases (they
949 are still subject to the constraints that exist for all code running
950 from inside a module loaded via a PEP 302 loader and attempting to
951 perform IO operations based on __file__). Original patch by
952 Alexander Belopolsky.
953
954- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
955 allows backporting to maintenance branches. Original patch by
956 Alexander Belopolsky.
957
Antoine Pitrou7c59bc62008-12-13 23:20:54 +0000958- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
959 a non-ASCII letter.
960
Lars Gustäbel43fcf3a2008-12-12 14:58:38 +0000961- Issue #4616: TarFile.utime(): Restore directory times on Windows.
962
Benjamin Peterson433f32c2008-12-12 01:25:05 +0000963- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
964 codec cannot be found. This is for compatibility with the builtin behavior.
965
Facundo Batista708d5812008-12-11 04:20:07 +0000966- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
967 give correct results in the case where one argument is a quiet NaN
968 and the other is a finite number that requires rounding.
969
Skip Montanaroc1ce2862008-12-06 17:25:02 +0000970- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
971 libs.
972
Georg Brandlf9734072008-12-07 15:30:06 +0000973- Added the subprocess.check_call_output() convenience function to get output
974 from a subprocess on success or raise an exception on error.
975
976- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
977 support unusual filenames (such as those containing semi-colons) in
978 Content-Disposition headers.
979
980- Issue #4384: Added logging integration with warnings module using
981 captureWarnings(). This change includes a NullHandler which does nothing;
982 it will be of use to library developers who want to avoid the "No handlers
983 could be found for logger XXX" message which can appear if the library user
984 doesn't configure logging.
985
986- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
987 exception.
988
Georg Brandleee31162008-12-07 15:15:22 +0000989- Issue #4529: fix the parser module's validation of try-except-finally
990 statements.
991
992- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
993 not a malformed option.
994
995- Added the subprocess.check_output() convenience function to get output
996 from a subprocess on success or raise an exception on error.
997
Amaury Forgeot d'Arcbc9d4742008-12-05 01:40:43 +0000998- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
999 the corresponding tests now pass.
1000
Amaury Forgeot d'Arcbc2ce572008-12-05 01:02:21 +00001001- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
1002 it was calling the wrong open() function.
1003
Fred Drake9a0a65b2008-12-04 19:24:50 +00001004- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
1005 support unusual filenames (such as those containing semi-colons) in
1006 Content-Disposition headers.
1007
Matthias Klose2c7e3ee2009-01-10 17:08:25 +00001008- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
1009 biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
1010
Benjamin Peterson5c6d7872009-02-06 02:40:07 +00001011- Issue #5104: The socket module now raises OverflowError when 16-bit port and
1012 protocol numbers are supplied outside the allowed 0-65536 range on bind()
1013 and getservbyport().
1014
Jeroen Ruigrok van der Werven0a866942009-05-08 14:18:00 +00001015- Windows locale mapping updated to Vista.
1016
Antoine Pitrou2a013ea2008-12-27 20:39:28 +00001017Tools/Demos
1018-----------
1019
Antoine Pitrou8a681222009-02-07 17:13:31 +00001020- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
1021 and make it 2.6-compatible.
1022
Guilherme Poloa7d27972009-01-28 16:06:51 +00001023- Ttk demos added in Demo/tkinter/ttk/
1024
Antoine Pitrou2a013ea2008-12-27 20:39:28 +00001025- Issue #4677: add two list comprehension tests to pybench.
1026
Georg Brandlb1441c72009-01-03 22:33:39 +00001027
1028Build
1029-----
1030
Martin v. Löwis8482ef92009-05-05 16:14:30 +00001031- Issue #5847: Remove -n switch on "Edit with IDLE" menu item.
1032
Antoine Pitrou8966c992009-05-01 21:18:27 +00001033- Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
1034 linker, rather than always exit successfully. Patch by Floris Bruynooghe.
1035
Matthias Klose55708cc2009-04-30 08:06:49 +00001036- Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
1037 the order that backends for the dbm extension are checked.
1038
Matthias Klose906785c2009-02-22 23:18:38 +00001039- Link the shared python library with $(MODLIBS).
1040
Martin v. Löwis11f72102009-02-10 13:13:30 +00001041- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
1042
Martin v. Löwisbc186a82009-02-02 15:32:22 +00001043- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
1044
Martin v. Löwise97637d2009-01-11 09:45:11 +00001045- Issue #4895: Use _strdup on Windows CE.
1046
Georg Brandlb1441c72009-01-03 22:33:39 +00001047- Issue #4472: "configure --enable-shared" now works on OSX
1048
1049- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
1050
1051- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
1052
1053- Issue #4289: Remove Cancel button from AdvancedDlg.
1054
1055- Issue #1656675: Register a drop handler for .py* files on Windows.
1056
1057- Issue #4120: Exclude manifest from extension modules in VS2008.
1058
1059- Issue #4091: Install pythonxy.dll in system32 again.
1060
1061- Issue #4018: Disable "for me" installations on Vista.
1062
1063- Issue #3758: Add ``patchcheck`` build target to .PHONY.
1064
1065- Issue #4204: Fixed module build errors on FreeBSD 4.
1066
1067
1068C-API
1069-----
1070
Mark Dickinson21776072009-02-10 16:13:25 +00001071- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
1072 for negative arguments. Previously, it raised TypeError.
1073
Georg Brandlb1441c72009-01-03 22:33:39 +00001074- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
1075
1076- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
1077 the GIL is released, or owned by another thread.
1078
1079- Issue #4122: On Windows, fix a compilation error when using the
1080 Py_UNICODE_ISSPACE macro in an extension module.
1081
1082
Mark Dickinsone675f082008-12-11 21:56:00 +00001083Extension Modules
1084-----------------
1085
Gregory P. Smith365a1862009-02-12 07:35:29 +00001086- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
1087 supporting objects as input no matter how it was compiled (built in
1088 implementations or external openssl library).
1089
Mark Dickinson29500f62009-01-15 15:36:10 +00001090- Issue #4397: Fix occasional test_socket failure on OS X.
1091
Martin v. Löwisa9b54c72009-01-11 09:30:50 +00001092- Issue #4279: Fix build of parsermodule under Cygwin.
1093
Antoine Pitroubcd5cbe2009-01-08 21:17:16 +00001094- Issue #4751: hashlib now releases the GIL when hashing large buffers
1095 (with a hardwired threshold of 2048 bytes), allowing better parallelization
1096 on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.
1097
Martin v. Löwis5c88d812009-01-02 20:47:48 +00001098- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
1099
Antoine Pitrou31f30b12009-01-02 17:34:35 +00001100- Issue #4738: Each zlib object now has a separate lock, allowing to compress
1101 or decompress several streams at once on multi-CPU systems. Also, the GIL
1102 is now released when computing the CRC of a large buffer. Patch by ebfe.
1103
Georg Brandlb1441c72009-01-03 22:33:39 +00001104- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
1105
Martin v. Löwis05bfe1f2008-12-29 18:21:47 +00001106- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
1107
Mark Dickinsone675f082008-12-11 21:56:00 +00001108- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
1109 OpenBSD.
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +00001110
Antoine Pitrou3ad3a0d2008-12-18 17:08:32 +00001111- Issue #4583: array.array would not always prohibit resizing when a buffer
1112 has been exported, resulting in an interpreter crash when accessing the
1113 buffer.
1114
Martin v. Löwis841edad2008-11-30 10:36:49 +00001115
Jack Diederiche0cbd692009-04-01 04:27:09 +00001116- Issue #5228: Make functools.partial objects can now be pickled.
1117
Guilherme Polo9de29af2009-01-28 20:40:48 +00001118Tests
1119-----
1120
R. David Murraya21e4ca2009-03-31 23:16:50 +00001121- regrtest no longer treats ImportError as equivalent to SkipTest. Imports
Vinay Sajipad5fa2f2009-04-27 13:55:05 +00001122 that should cause a test to be skipped are now done using import_module
R. David Murraya21e4ca2009-03-31 23:16:50 +00001123 from test support, which does the conversion.
1124
Guilherme Polo9de29af2009-01-28 20:40:48 +00001125- Issue #5083: New 'gui' resource for regrtest.
1126
1127
Brett Cannon7317c1e2008-11-25 19:19:17 +00001128Docs
1129----
1130
Georg Brandl52b92cc2008-05-25 09:43:03 +00001131
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001132**(For information about older versions, consult the HISTORY file.)**