blob: c1949f51998a061e03910e218e229951412bb1ee [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
R. David Murray99352742009-05-07 18:24:38 +000026- Issue 5955: aifc's close method did not close the file it wrapped,
27 now it does. This also means getfp method now returns the real fp.
28
Benjamin Petersonaccdca52009-05-06 23:26:59 +000029
Brett Cannon1262e7c2009-05-11 01:47:11 +000030Tests
31-----
32
33- Issue 5442: Tests for importlib were not properly skipping case-sensitivity
34 tests on darwin even when the OS was installed on a case-sensitive
35 filesystem. Also fixed tests that should not be run when
36 sys.dont_write_bytecode is true.
37
38
Benjamin Petersonbd35b032009-04-04 23:16:41 +000039What's New in Python 3.1 beta 1?
40================================
41
Benjamin Peterson5c5f3de2009-05-06 20:43:28 +000042*Release date: 2009-05-06*
Benjamin Petersonbd35b032009-04-04 23:16:41 +000043
44Core and Builtins
45-----------------
46
Mark Dickinson865e01a2009-05-07 16:37:01 +000047- Issue #5914: Add new C API function PyOS_string_to_double, and
48 deprecate PyOS_ascii_strtod and PyOS_ascii_atof.
49
Eric Smith741191f2009-05-06 13:08:15 +000050- Issue #3382: float.__format__, complex.__format__, and %-formatting
51 no longer map 'F' to 'f'. Because of issue #5859 (below), this only
52 affects nan -> NAN and inf -> INF.
53
Mark Hammond5a607a32009-05-06 08:04:54 +000054- Issue #5799: ntpath (ie, os.path on Windows) fully supports UNC pathnames
55 in all operations, including splitdrive, split, etc. splitunc() now issues
56 a PendingDeprecation warning.
57
Eric Smith63376222009-05-05 14:04:18 +000058- Issue #5920: For float.__format__, change the behavior with the
59 empty presentation type (that is, not one of 'e', 'f', 'g', or 'n')
60 to be like 'g' but with at least one decimal point and with a
61 default precision of 12. Previously, the behavior the same but with
62 a default precision of 6. This more closely matches str(), and
63 reduces surprises when adding alignment flags to the empty
64 presentation type. This also affects the new complex.__format__ in
65 the same way.
66
Martin v. Löwis011e8422009-05-05 04:43:17 +000067- Implement PEP 383, Non-decodable Bytes in System Character Interfaces.
68
R. David Murrayb18500d2009-05-04 22:59:07 +000069- Issue #5890: in subclasses of 'property' the __doc__ attribute was
70 shadowed by classtype's, even if it was None. property now
71 inserts the __doc__ into the subclass instance __dict__.
72
Antoine Pitrou244651a2009-05-04 18:56:13 +000073- Issue #4426: The UTF-7 decoder was too strict and didn't accept some legal
74 sequences. Patch by Nick Barnes and Victor Stinner.
75
Martin v. Löwise0a2b722009-05-10 08:08:56 +000076- Issue #3672: Reject surrogates in utf-8 codec; add surrogatepass error handler.
Martin v. Löwisdb12d452009-05-02 18:52:14 +000077
Benjamin Petersond2e0c792009-05-01 20:40:59 +000078- Issue #5883: In the io module, the BufferedIOBase and TextIOBase ABCs have
79 received a new method, detach(). detach() disconnects the underlying stream
80 from the buffer or text IO and returns it.
81
Mark Dickinson33841c32009-05-01 15:37:04 +000082- Issue #5859: Remove switch from '%f' to '%g'-style formatting for
83 floats with absolute value over 1e50. Also remove length
84 restrictions for float formatting: '%.67f' % 12.34 and '%.120e' %
85 12.34 no longer raise an exception.
Mark Dickinsonf489caf2009-05-01 11:42:00 +000086
Eric Smith741191f2009-05-06 13:08:15 +000087- Issue #1588: Add complex.__format__. For example,
Eric Smith58a42242009-04-30 01:00:33 +000088 format(complex(1, 2./3), '.5') now produces a sensible result.
89
Mark Dickinsond3ca5572009-04-29 18:47:07 +000090- Issue #5864: Fix empty format code formatting for floats so that it
91 never gives more than the requested number of significant digits.
92
Eric Smith6dc46f52009-04-27 20:39:49 +000093- Issue #5793: Rationalize isdigit / isalpha / tolower, etc. Includes
94 new Py_ISDIGIT / Py_ISALPHA / Py_TOLOWER, etc. in pctypes.h.
95
Eric Smithcc32a112009-04-26 21:35:14 +000096- Issue #5835: Deprecate PyOS_ascii_formatd.
97
Martin v. Löwis71efeb72009-04-26 01:02:07 +000098- Issue #4971: Fix titlecase for characters that are their own
99 titlecase, but not their own uppercase.
100
Benjamin Peterson193152c2009-04-25 01:08:45 +0000101- Issue #5283: Setting __class__ in __del__ caused a segfault.
102
Mark Dickinsonad476da2009-04-23 19:14:16 +0000103- Issue #5816: complex(repr(z)) now recovers z exactly, even when
104 z involves nans, infs or negative zeros.
105
Mark Dickinson4a16e3a2009-04-23 19:15:48 +0000106- Issue #3166: Make int -> float conversions correctly rounded.
Mark Dickinsonc6300392009-04-20 21:38:00 +0000107
Mark Dickinsone6a076d2009-04-18 11:48:33 +0000108- Issue #1869 (and many duplicates): make round(x, n) correctly
109 rounded for a float x, by using the decimal <-> binary conversions
110 from Python/dtoa.c. As a consequence, (e.g.) round(x, 2) now
111 consistently agrees with format(x, '.2f').
112
Benjamin Petersonae937c02009-04-18 20:54:08 +0000113- Issue #5787: object.__getattribute__(some_type, "__bases__") segfaulted on
114 some builtin types.
115
Eric Smith0923d1d2009-04-16 20:16:10 +0000116- Issue #5772: format(1e100, '<') produces '1e+100', not '1.0e+100'.
117
Eric Smith35e84722009-04-16 20:21:28 +0000118- Issue #5515: str.format() type 'n' combined with commas and leading
119 zeros no longer gives odd results with ints and floats.
Eric Smith0923d1d2009-04-16 20:16:10 +0000120
121- Implement PEP 378, Format Specifier for Thousands Separator, for
122 floats.
123
Mark Dickinson3370cce2009-04-17 22:40:53 +0000124- The str function switches to exponential notation at
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000125 1e11, not 1e12. This avoids printing 13 significant digits in
126 situations where only 12 of them are correct. Example problem
127 value: str(1e11 + 0.5). (This minor issue has existed in 2.x for a
128 long time.)
129
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000130- Issue #1580: On most platforms, use a 'short' float repr: for a
131 finite float x, repr(x) now outputs a string based on the shortest
132 sequence of decimal digits that rounds to x. Previous behaviour was
133 to output 17 significant digits and then strip trailing zeros.
Mark Dickinson3370cce2009-04-17 22:40:53 +0000134 Another minor difference is that the new repr switches to
135 exponential notation at 1e16 instead of the previous 1e17; this
136 avoids misleading output in some cases.
Mark Dickinsonb08a53a2009-04-16 19:52:09 +0000137
138 There's a new sys attribute sys.float_repr_style, which takes
139 the value 'short' to indicate that we're using short float repr,
140 and 'legacy' if the short float repr isn't available for one
141 reason or another.
142
143 The float repr change involves incorporating David Gay's 'perfect
144 rounding' code into the Python core (it's in Python/dtoa.c). As a
145 secondary consequence, all string-to-float and float-to-string
146 conversions (including all float formatting operations) will be
147 correctly rounded on these platforms.
148
149 See issue 1580 discussions for details of platforms for which
150 this change does not apply.
151
Benjamin Peterson2808d3c2009-04-15 21:34:27 +0000152- Issue #5759: float() didn't call __float__ on str subclasses.
153
Georg Brandlabc38772009-04-12 15:51:51 +0000154- The string.maketrans() function is deprecated; there is a new static method
155 maketrans() on the bytes and bytearray classes. This removes confusion about
156 the types string.maketrans() is supposed to work with, and mirrors the
157 methods available on the str class.
158
R. David Murraydc6da8a2009-04-09 22:16:43 +0000159- Issue #2170: refactored xml.dom.minidom.normalize, increasing both
160 its clarity and its speed.
161
Matthias Klose091c7b12009-04-07 13:24:27 +0000162- Issue #1113244: Py_XINCREF, Py_DECREF, Py_XDECREF: Add `do { ... } while (0)'
163 to avoid compiler warnings.
164
Walter Dörwald8dc33d52009-05-06 14:41:26 +0000165- Issue #3739: The unicode-internal encoder now reports the number of characters
166 consumed like any other encoder (instead of the number of bytes).
167
Benjamin Peterson0b4915e2009-04-25 21:11:45 +0000168Installation
169------------
170
171- Issue #5756: Install idle and pydoc with a 3 suffix.
172
Benjamin Petersonbd35b032009-04-04 23:16:41 +0000173Library
174-------
175
Tarek Ziadédd9f65f2009-05-06 07:26:24 +0000176- Issue #5940: distutils.command.build_clib.check_library_list was not doing
177 the right type checkings anymore.
178
Thomas Heller00cfc372009-05-05 19:04:40 +0000179- Issue #4875: On win32, ctypes.util.find_library does no longer
180 return directories.
181
Georg Brandl243ad662009-05-05 09:00:19 +0000182- Issue #5142: Add the ability to skip modules while stepping to pdb.
183
Georg Brandl991f9202009-05-05 08:31:54 +0000184- Issue #1309567: Fix linecache behavior of stripping subdirectories when
185 looking for files given by a relative filename.
186
Georg Brandleaa84ef2009-05-05 08:14:33 +0000187- Issue #5923: Update the ``turtle`` module to version 1.1, add two new
188 turtle demos in Demo/turtle.
189
Antoine Pitrou3c33e082009-05-04 21:21:36 +0000190- Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when
191 extracting a file to the root directory.
192
Hirokazu Yamamotobbb9be72009-05-04 05:56:46 +0000193- Issue #5913: os.listdir() should fail for empty path on windows.
194
Antoine Pitroua9f48a02009-05-02 21:41:14 +0000195- Issue #5084: unpickling now interns the attribute names of pickled objects,
196 saving memory and avoiding growth in size of subsequent pickles. Proposal
197 and original patch by Jake McGuire.
198
Benjamin Petersonc6b607d2009-05-02 12:36:44 +0000199- The json module now works exclusively with str and not bytes.
200
Gregory P. Smithe54dff52009-05-01 22:13:48 +0000201- Issue #3959: The ipaddr module has been added to the standard library.
202 Contributed by Google.
203
Antoine Pitrou7fff0962009-05-01 21:09:44 +0000204- Issue #3002: ``shutil.copyfile()`` and ``shutil.copytree()`` now raise an
205 error when a named pipe is encountered, rather than blocking infinitely.
206
Raymond Hettinger1f0db402009-04-29 00:38:08 +0000207- Issue #5857: tokenize.tokenize() now returns named tuples.
208
Thomas Hellerc1edc2d2009-04-28 19:55:58 +0000209- Issue #4305: ctypes should now build again on mipsel-linux-gnu
210
Antoine Pitrou7a0fedf2009-04-27 22:31:40 +0000211- Issue #1734234: Massively speedup ``unicodedata.normalize()`` when the
212 string is already in normalized form, by performing a quick check beforehand.
213 Original patch by Rauli Ruohonen.
214
Antoine Pitrou57f3d932009-04-27 21:04:19 +0000215- Issue #5853: calling a function of the mimetypes module from several threads
216 at once could hit the recursion limit if the mimetypes database hadn't been
217 initialized before.
218
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000219- Issue #5854: Updated __all__ to include some missing names and remove some
220 names which should not be exported.
221
Thomas Heller34596a92009-04-24 20:50:00 +0000222- Issue #3102: All global symbols that the _ctypes extension defines
223 are now prefixed with 'Py' or '_ctypes'.
224
225- Issue #5041: ctypes does now allow pickling wide character.
226
Mark Dickinsond4d95f82009-04-24 14:06:19 +0000227- Issue #5812: For the two-argument form of the Fraction constructor,
228 Fraction(m, n), m and n are permitted to be arbitrary Rational
229 instances.
230
Mark Dickinsoncf63f2f2009-04-22 17:50:21 +0000231- Issue #5812: Fraction('1e6') is valid: more generally, any string
232 that's valid for float() is now valid for Fraction(), with the
233 exception of strings representing NaNs and infinities.
234
Antoine Pitroucf4c7492009-04-19 00:09:36 +0000235- Issue #5734: BufferedRWPair was poorly tested and had several glaring
236 bugs. Patch by Brian Quinlan.
237
R. David Murray9e94ddf2009-04-13 17:06:33 +0000238- Issue #1161031: fix readwrite select flag handling: POLLPRI now
239 results in a handle_expt_event call, not handle_read_event, and POLLERR
240 and POLLNVAL now call handle_close, not handle_expt_event. Also,
241 dispatcher now has an 'ignore_log_types' attribute for suppressing
242 log messages, which is set to 'warning' by default.
243
Matthias Klosea3d29e82009-04-07 13:13:10 +0000244- Issue #2703: SimpleXMLRPCDispatcher.__init__: Provide default values for
245 new arguments introduced in 2.5.
246
Walter Dörwald1b08b302009-04-25 14:13:56 +0000247- Issue #5828 (Invalid behavior of unicode.lower): Fixed bogus logic in
248 makeunicodedata.py and regenerated the Unicode database (This fixes
249 u'\u1d79'.lower() == '\x00').
250
Matthias Klose535336f2009-04-07 13:49:45 +0000251Extension Modules
252-----------------
253
Benjamin Petersone04b6272009-05-04 22:25:21 +0000254- Issue #5881: Remove old undocumented compatibility interfaces in hashlib and
255 pwd.
256
Mark Dickinsonea835e72009-04-19 20:40:33 +0000257- Issue #5463: In struct module, remove deprecated float coercion
258 for integer type codes: struct.pack('L', 0.3) should now raise
259 an error. The _PY_STRUCT_FLOAT_COERCE constant has been removed.
260 The version number has been bumped to 0.3.
261
Matthias Klose535336f2009-04-07 13:49:45 +0000262- Issue #5359: Readd the Berkley-DB detection code to allow _dbm be built
263 using Berkley-DB.
264
Nick Coghlan47384702009-04-22 16:13:36 +0000265Tests
266-----
267
268- Issue #5354: New test support function import_fresh_module() makes
269 it easy to import both normal and optimised versions of modules.
270 test_heapq and test_warnings have been adjusted to use it, tests for
271 other modules with both C and Python implementations in the stdlib
272 can be adjusted to use it over time.
273
Walter Dörwald4ba80132009-04-25 12:48:43 +0000274- Issue #5837: Certain sequences of calls to set() and unset() for
275 support.EnvironmentVarGuard objects restored the environment variables
276 incorrectly on __exit__.
277
Benjamin Petersonb173f782009-05-05 22:31:58 +0000278C-API
279-----
280
281- Issue #5630: A replacement PyCObject API, PyCapsule, has been added.
282
Benjamin Petersonbd35b032009-04-04 23:16:41 +0000283
Benjamin Petersond1735892009-03-07 18:46:21 +0000284What's New in Python 3.1 alpha 2?
285=================================
286
Benjamin Peterson88f14352009-04-04 21:06:52 +0000287*Release date: 2009-4-4*
Benjamin Petersond1735892009-03-07 18:46:21 +0000288
289Core and Builtins
290-----------------
Benjamin Petersone099b372009-04-04 17:09:35 +0000291
Eric Smith1e1d7d22009-04-03 22:25:33 +0000292- Implement PEP 378, Format Specifier for Thousands Separator, for
293 integers.
Benjamin Petersond1735892009-03-07 18:46:21 +0000294
Benjamin Peterson8f76b492009-04-03 22:22:42 +0000295- Issue #5666: Py_BuildValue's 'c' code should create byte strings.
296
Benjamin Peterson7fe98532009-04-02 00:33:55 +0000297- Issue #5499: The 'c' code for argument parsing functions now only accepts a
298 byte, and the 'C' code only accepts a unicode character.
299
Georg Brandl406b3d82009-04-11 21:24:37 +0000300- Fix a problem in PyErr_NormalizeException that leads to "undetected errors"
301 when hitting the recursion limit under certain circumstances.
302
Brett Cannon0759dd62009-04-01 18:13:07 +0000303- Issue #1665206: Remove the last eager import in _warnings.c and make it lazy.
304
Georg Brandlab6f2f62009-03-31 04:16:10 +0000305- Fix a segfault when running test_exceptions with coverage, caused by
306 insufficient checks in accessors of Exception.__context__.
307
Guido van Rossum0ad59d42009-03-30 22:01:35 +0000308- Issue #5604: non-ASCII characters in module name passed to
309 imp.find_module() were converted to UTF-8 while the path is
310 converted to the default filesystem encoding, causing nonsense.
311
Benjamin Peterson09832742009-03-26 17:15:46 +0000312- Issue #5126: str.isprintable() returned False for space characters.
313
Ronald Oussorenfa1fcd12009-03-30 23:16:10 +0000314- Issue #4865: On MacOSX /Library/Python/2.7/site-packages is added to
315 the end sys.path, for compatibility with the system install of Python.
316
Antoine Pitrou3a652b12009-03-23 18:52:06 +0000317- Issue #4688: Add a heuristic so that tuples and dicts containing only
318 untrackable objects are not tracked by the garbage collector. This can
319 reduce the size of collections and therefore the garbage collection overhead
320 on long-running programs, depending on their particular use of datatypes.
321
Mark Dickinson17e4fdd2009-03-23 18:44:57 +0000322- Issue #5512: Rewrite PyLong long division algorithm (x_divrem) to
323 improve its performance. Long divisions and remainder operations
324 are now between 50% and 150% faster.
325
Mark Dickinsonbd792642009-03-18 20:06:12 +0000326- Issue #4258: Make it possible to use base 2**30 instead of base
327 2**15 for the internal representation of integers, for performance
328 reasons. Base 2**30 is enabled by default on 64-bit machines. Add
329 --enable-big-digits option to configure, which overrides the
330 default. Add sys.int_info structseq to provide information about
331 the internal format.
332
Mark Dickinson081dfee2009-03-18 14:47:41 +0000333- Issue #4474: PyUnicode_FromWideChar now converts characters outside
334 the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
335 and sizeof(Py_UNICODE) == 2.
336
Eric Smith8ec90442009-03-14 12:29:34 +0000337- Issue #5237: Allow auto-numbered fields in str.format(). For
338 example: '{} {}'.format(1, 2) == '1 2'.
339
Antoine Pitrou652e7072009-03-13 19:25:20 +0000340- Issue #5392: when a very low recursion limit was set, the interpreter would
341 abort with a fatal error after the recursion limit was hit twice.
342
Matthias Klose042f1332009-04-04 14:32:42 +0000343- Issue #3845: In PyRun_SimpleFileExFlags avoid invalid memory access with
344 short file names.
345
Benjamin Petersond1735892009-03-07 18:46:21 +0000346Library
347-------
348
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000349- Issue #2625: added missing items() call to the for loop in
R. David Murray548ac412009-04-02 19:44:43 +0000350 mailbox.MH.get_message().
351
Hye-Shik Chang944820b2009-04-02 10:33:16 +0000352- Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
353 error substitutions from non-strict codec error callbacks in
354 incrementalencoder and StreamWriter.
355
Georg Brandl33c28812009-04-01 23:07:29 +0000356- Issue #5656: Fix the coverage reporting when running the test suite with
357 the -T argument.
358
Raymond Hettinger3f10a952009-04-01 19:05:50 +0000359- Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.
360
Georg Brandl4ed72ac2009-04-01 04:28:33 +0000361- Issue #5624: Fix the _winreg module name still used in several modules.
362
Benjamin Petersona1b49012009-03-31 23:11:32 +0000363- Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.
364
Jesse Nollera9314042009-03-31 22:36:44 +0000365- Issue #5619: Multiprocessing children disobey the debug flag and causes
366 popups on windows buildbots. Patch applied to work around this issue.
367
Jesse Noller32d68c22009-03-31 18:48:42 +0000368- Issue #5400: Added patch for multiprocessing on netbsd compilation/support
369
Hirokazu Yamamoto16caab02009-03-31 13:44:06 +0000370- Issue #5387: Fixed mmap.move crash by integer overflow.
371
Jesse Nollerf8d00852009-03-31 03:25:07 +0000372- Issue #5261: Patch multiprocessing's semaphore.c to support context
373 manager use: "with multiprocessing.Lock()" works now.
374
Brett Cannon7f6b4f82009-03-30 21:30:26 +0000375- Issue #5236: Change time.strptime() to only take strings. Didn't work with
376 bytes already but the failure was non-obvious.
377
Jesse Noller7af4ef82009-03-30 16:47:15 +0000378- Issue #5177: Multiprocessing's SocketListener class now uses
379 socket.SO_REUSEADDR on all connections so that the user no longer needs
380 to wait 120 seconds for the socket to expire.
381
Benjamin Peterson48e24782009-03-29 13:02:52 +0000382- Issue #5595: Fix UnboundedLocalError in ntpath.ismount().
383
Antoine Pitrou66994e12009-03-29 00:45:26 +0000384- Issue #1174606: Calling read() without arguments of an unbounded file
385 (typically /dev/zero under Unix) could crash the interpreter.
386
Benjamin Peterson59406a92009-03-26 17:10:29 +0000387- The max_buffer_size arguments of io.BufferedWriter, io.BufferedRWPair, and
388 io.BufferedRandom have been deprecated for removal in Python 3.2.
389
Lars Gustäbel42e00912009-03-22 20:34:29 +0000390- Issue #5068: Fixed the tarfile._BZ2Proxy.read() method that would loop
391 forever on incomplete input. That caused tarfile.open() to hang when used
392 with mode 'r' or 'r:bz2' and a fileobj argument that contained no data or
393 partial bzip2 compressed data.
394
Mark Dickinson79f52032009-03-17 23:12:51 +0000395- Issue #2110: Add support for thousands separator and 'n' type
396 specifier to Decimal.__format__
397
Mark Dickinson9c59fe02009-03-17 18:15:08 +0000398- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
399 '>' alignment characters.
400
Antoine Pitrou0ae29cf2009-03-13 22:33:17 +0000401- The error detection code in FileIO.close() could fail to reflect the `errno`
402 value, and report it as -1 instead.
403
Antoine Pitroua28fcfd2009-03-13 23:42:55 +0000404- Issue #5016: FileIO.seekable() could return False if the file position
405 was negative when truncated to a C int. Patch by Victor Stinner.
406
Mark Dickinsonae681df2009-03-21 10:26:31 +0000407Extension Modules
408-----------------
409
Benjamin Petersone099b372009-04-04 17:09:35 +0000410- Issue #5391: mmap now deals exclusively with bytes.
411
Mark Dickinsonae681df2009-03-21 10:26:31 +0000412- Issue #5463: In struct module, remove deprecated overflow wrapping
413 when packing an integer: struct.pack('=L', -1) now raises
Mark Dickinsonb40b9472009-03-29 16:58:21 +0000414 struct.error instead of returning b'\xff\xff\xff\xff'. The
415 _PY_STRUCT_RANGE_CHECKING and _PY_STRUCT_OVERFLOW_MASKING constants
416 have been removed from the struct module.
Mark Dickinsonae681df2009-03-21 10:26:31 +0000417
Benjamin Petersond1735892009-03-07 18:46:21 +0000418
Benjamin Petersona58a6262009-03-07 16:34:40 +0000419What's New in Python 3.1 alpha 1
Barry Warsaw97f005d2008-12-03 16:46:14 +0000420================================
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000421
Benjamin Petersona58a6262009-03-07 16:34:40 +0000422*Release date: 2009-03-07*
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000423
424Core and Builtins
425-----------------
426
Benjamin Peterson4fa88fa2009-03-04 00:14:51 +0000427- The io module has been reimplemented in C for speed.
428
Raymond Hettingerb0d56af2009-03-03 10:52:49 +0000429- Give dict views an informative __repr__.
430
Eric Smith5e5c0db2009-02-20 14:25:03 +0000431- Issue #5247: Improve error message when unknown format codes are
432 used when using str.format() with str, int, and float arguments.
433
Hirokazu Yamamoto575d1332009-02-16 09:13:20 +0000434- Issue #5249: time.strftime returned malformed string when format string
435 contained non ascii character on windows.
436
Benjamin Petersonf5b52242009-03-02 23:31:26 +0000437- Issue #4626: compile(), exec(), and eval() ignore the coding cookie if the
438 source has already been decoded into str.
439
Antoine Pitrou79eee6b2009-02-13 14:01:05 +0000440- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
441 rotating the object pointer by 4 bits to the right.
442
Mark Dickinson87ec0852009-02-09 17:15:59 +0000443- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
444 it now forces its argument to double before testing for infinity.
445
Benjamin Petersonee1ae7c2009-02-08 21:07:20 +0000446- Issue #5137: Make len() correctly raise a TypeError when a __len__ method
447 returns a non-number type.
448
Benjamin Peterson87618552009-02-08 15:00:52 +0000449- Issue #5182: Removed memoryview.__str__.
450
Mark Dickinsonc008a172009-02-01 13:59:22 +0000451- Issue #1717: Removed builtin cmp() function, dropped tp_compare
452 slot, the C API functions PyObject_Compare and PyUnicode_Compare and
Mark Dickinsone94c6792009-02-02 20:36:42 +0000453 the type definition cmpfunc. The tp_compare slot has been renamed
454 to tp_reserved, and is reserved for future usage.
Mark Dickinsonf02e0aa2009-02-01 12:13:56 +0000455
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000456- Issue #1242657: the __len__() and __length_hint__() calls in several tools
Raymond Hettingere8364232009-02-02 22:55:09 +0000457 were suppressing all exceptions. These include list() and bytearray().
458
Mark Dickinson1124e712009-01-28 21:25:58 +0000459- Issue #4707: round(x, n) now returns an integer if x is an integer.
460 Previously it returned a float.
461
Antoine Pitroub52ec782009-01-25 16:34:23 +0000462- Issue #4753: By enabling a configure option named '--with-computed-gotos'
463 on compilers that support it (notably: gcc, SunPro, icc), the bytecode
464 evaluation loop is compiled with a new dispatch mechanism which gives
465 speedups of up to 20%, depending on the system, on various benchmarks.
466
Antoine Pitrou81fabdb2009-01-22 10:11:36 +0000467- Issue #4874: Most builtin decoders now reject unicode input.
468
Mark Dickinson9ffc0202009-01-20 20:45:53 +0000469- Issue #4842: Don't allow trailing 'L' when constructing an integer
470 from a string.
471
Benjamin Peterson05e782f2009-01-19 15:15:02 +0000472- Issue #4991: os.fdopen now raises an OSError for invalid file descriptors.
473
Antoine Pitroue4bc7f62009-01-17 21:06:43 +0000474- Issue #4838: When a module is deallocated, free the memory backing the
475 optional module state data.
476
Mark Dickinson8055afd2009-01-17 10:04:45 +0000477- Issue #4910: Rename nb_long slot to nb_reserved, and change its
478 type to (void *).
479
Antoine Pitrou8d4e5052009-01-13 22:59:11 +0000480- Issue #4935: The overflow checking code in the expandtabs() method common
481 to str, bytes and bytearray could be optimized away by the compiler, letting
482 the interpreter segfault instead of raising an error.
483
Amaury Forgeot d'Arcf343e012009-01-12 23:58:21 +0000484- Issue #3720: Fix a crash when an iterator modifies its class and removes its
485 __next__ method.
486
Mark Dickinsone5e298f2009-01-12 20:49:19 +0000487- Issue #4910: Builtin int() function and PyNumber_Long/PyNumber_Int API
488 function no longer attempt to call the __long__ slot to convert an object
489 to an integer. Only the __int__ and __trunc__ slots are examined.
490
Martin v. Löwis7c2b66c2009-01-12 08:21:03 +0000491- Issue #4893: Use NT threading on CE.
492
Martin v. Löwisec59d042009-01-12 07:59:10 +0000493- Issue #4915: Port sysmodule to Windows CE.
494
Antoine Pitrouab868312009-01-10 15:40:25 +0000495- Issue #4868: utf-8, utf-16 and latin1 decoding are now 2x to 4x faster. The
496 common cases are optimized thanks to a dedicated fast path and a moderate
497 amount of loop unrolling.
498
Antoine Pitrou14b78f52009-01-09 22:27:08 +0000499- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
500 collecting the oldest generation) so that allocating lots of objects without
501 destroying them does not show quadratic performance. Based on a proposal by
502 Martin von Löwis at
503 http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
504
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000505- Issue #4604: Some objects of the I/O library could still be used after
Antoine Pitrou8043cf82009-01-09 19:54:29 +0000506 having been closed (for instance, a read() call could return some
507 previously buffered data). Patch by Dmitry Vasiliev.
508
Antoine Pitrou05608432009-01-09 18:53:14 +0000509- Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
510 flag to work properly. Furthermore, when specifying -u, the text stdout
511 and stderr streams have line-by-line buffering enabled (the default being
512 to buffer arbitrary chunks of data).
513
Raymond Hettinger35631532009-01-09 03:58:09 +0000514- The internal table, _PyLong_DigitValue, is now an array of unsigned chars
515 instead of ints (reducing its size from 4 to 8 times thereby reducing
516 Python's overall memory).
517
Antoine Pitroud35cbf62009-01-06 19:02:24 +0000518- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
519 an existing .py counterpart, override the co_filename attributes of all
520 code objects if the original filename is obsolete (which can happen if the
521 file has been renamed, moved, or if it is accessed through different paths).
522 Patch by Ziga Seilnacht and Jean-Paul Calderone.
523
Antoine Pitrouc3b39242009-01-03 16:59:18 +0000524- Issue #4580: Fix slicing of memoryviews when the item size is greater than
525 one byte. Also fixes the meaning of len() so that it returns the number of
526 items, rather than the size in bytes.
527
Martin v. Löwis5c88d812009-01-02 20:47:48 +0000528- Issue #4075: Use OutputDebugStringW in Py_FatalError.
529
Amaury Forgeot d'Arc374e2202009-01-01 23:05:36 +0000530- Issue #4747: When the terminal does not use utf-8, executing a script with
531 non-ascii characters in its name could fail with a "SyntaxError: None" error.
532
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000533- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
Hirokazu Yamamoto8ed9a802009-01-01 16:09:52 +0000534 file with `bytes' filename on Windows.
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +0000535
Antoine Pitrou7ddda782009-01-01 15:35:33 +0000536- Issue #3680: Reference cycles created through a dict, set or deque iterator
537 did not get collected.
538
Nick Coghlanf1f2f682008-12-30 07:29:12 +0000539- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
540 where the tp_hash and tp_dict slots are both NULL.
541
Georg Brandlccc47b62008-12-28 11:44:14 +0000542- Issue #4759: None is now allowed as the first argument of
543 bytearray.translate(). It was always allowed for bytes.translate().
544
Skip Montanaro80072cb2008-12-23 03:51:14 +0000545- Added test case to ensure attempts to read from a file opened for writing
546 fail.
547
Antoine Pitrou51f3ef92008-12-20 13:14:23 +0000548- Issue #3106: Speedup some comparisons (str/str and int/int).
549
Antoine Pitrouf289ae62008-12-18 11:06:25 +0000550- Issue #2183: Simplify and optimize bytecode for list, dict and set
551 comprehensions. Original patch for list comprehensions by Neal Norwitz.
552
Antoine Pitrou621601a2008-12-17 23:18:19 +0000553- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
554 print elapsed times, not only when some objects are uncollectable /
555 unreachable. Original patch by Neil Schemenauer.
556
Mark Dickinson54bc1ec2008-12-17 16:19:07 +0000557- Issue #3439: Add a bit_length method to int.
558
Mark Dickinsonda2706b2008-12-11 18:03:03 +0000559- Issue #2173: When getting device encoding, check that return value of
560 nl_langinfo is not the empty string. This was causing silent build
561 failures on OS X.
562
Jeffrey Yasskinb9083f32008-12-11 06:18:33 +0000563- Issue #4597: Fixed several opcodes that weren't always propagating
564 exceptions.
565
566- Issue #4589: Fixed exception handling when the __exit__ function of a
Amaury Forgeot d'Arc10b24e82008-12-10 23:49:33 +0000567 context manager returns a value that cannot be converted to a bool.
568
Mark Dickinsonfd24b322008-12-06 15:33:31 +0000569- Issue #4445: Replace "sizeof(PyBytesObject)" with
570 "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
571 bytes instances. On a typical machine this saves 3 bytes of memory
572 (on average) per allocation of a bytes instance.
573
Christian Heimesa872de52008-12-05 08:26:55 +0000574- Issue #4533: File read operation was dreadfully slow due to a slowly
575 growing read buffer. Fixed by using the same growth rate algorithm as
576 Python 2.x.
577
Antoine Pitrou5504e892008-12-06 21:27:53 +0000578- Issue #4509: Various issues surrounding resize of bytearray objects to
579 which there are buffer exports (e.g. memoryview instances).
580
Georg Brandlf9734072008-12-07 15:30:06 +0000581- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
582 method on file objects with closefd=False. The file descriptor is still
583 kept open but the file object behaves like a closed file. The ``FileIO``
584 object also got a new readonly attribute ``closefd``.
Matthias Klose7e1b8fa2008-11-26 17:22:04 +0000585
Antoine Pitroubc420402008-12-07 20:14:49 +0000586- Issue #4569: Interpreter crash when mutating a memoryview with an item size
587 larger than 1.
588
Benjamin Peterson371ccfb2008-12-27 19:03:36 +0000589- Issue #4748: Lambda generators no longer return a value.
590
Gregory P. Smithccc5ae72009-03-02 05:21:55 +0000591- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
592
Walter Dörwaldc1651a02009-05-03 22:55:55 +0000593- Issue #5108: Handle %s like %S, %R and %A in PyUnicode_FromFormatV(): Call
594 PyUnicode_DecodeUTF8() once, remember the result and output it in a second
595 step. This avoids problems with counting UTF-8 bytes that ignores the effect
596 of using the replace error handler in PyUnicode_DecodeUTF8().
597
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000598Library
599-------
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000600
Tarek Ziadéff0e5002009-05-12 17:14:01 +0000601- Issue #5977: distutils build_ext.get_outputs was not taking into account the
602 inplace option. Initial patch by kxroberto.
603
Tarek Ziadé06fbee12009-05-10 10:34:01 +0000604- Issue #5984: distutils.command.build_ext.check_extensions_list checks were broken
605 for old-style extensions.
606
Tarek Ziadébe5b1b92009-05-09 10:09:11 +0000607- Issue #5976: Fixed Distutils test_check_environ.
608
Tarek Ziadé5662d3e2009-05-07 21:24:43 +0000609- Issue #5941: Distutils build_clib command was not working anymore because
610 of an incomplete costumization of the archiver command. Added ARFLAGS in the
611 Makefile besides AR and make Distutils use it. Original patch by David
612 Cournapeau.
613
R. David Murrayb507d2e2009-04-29 15:34:32 +0000614- Issue #2245: aifc now skips chunk types it doesn't recognize, per spec.
615
Tarek Ziadé81623822009-04-29 08:07:44 +0000616- Issue #5874: distutils.tests.test_config_cmd is not locale-sensitive
617 anymore.
618
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000619- Issue #5810: Fixed Distutils test_build_scripts so it uses
Tarek Ziadé939f9c82009-04-25 12:53:56 +0000620 sysconfig.get_config_vars.
621
Tarek Ziadé23336082009-04-25 12:39:56 +0000622- Issue #4951: Fixed failure in test_httpservers.
623
Thomas Hellerd3cfe992009-04-24 20:10:24 +0000624- Issue #5795: Fixed test_distutils failure on Debian ppc.
625
Tarek Ziadé822e1d42009-04-13 12:37:57 +0000626- Issue #5607: fixed Distutils test_get_platform for Mac OS X fat binaries.
627
Georg Brandl1f9fa312009-04-27 16:42:58 +0000628- Issue #5741: don't disallow "%%" (which is an escape for "%") when setting
629 a value in SafeConfigParser.
630
Tarek Ziadéf396ecf2009-04-11 15:00:43 +0000631- Issue #5732: added a new command in Distutils: check.
632
Vinay Sajipad5fa2f2009-04-27 13:55:05 +0000633- Issue #5731: Distutils bdist_wininst no longer worked on non-Windows
Tarek Ziadéa6191802009-04-09 22:02:39 +0000634 platforms. Initial patch by Paul Moore.
635
Tarek Ziadéf6370502009-04-05 22:57:21 +0000636- Issue #5095: Added bdist_msi to the list of bdist supported formats.
637 Initial fix by Steven Bethard.
638
Tarek Ziadé889b0aa2009-04-05 21:49:36 +0000639- Issue #1491431: Fixed distutils.filelist.glob_to_re for edge cases.
640 Initial fix by Wayne Davison.
641
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000642- Issue #5694: removed spurious test output in Distutils (test_clean).
Tarek Ziadéea261632009-04-05 18:33:34 +0000643
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000644- Issue #1326077: fix the formatting of SyntaxErrors by the traceback module.
Georg Brandl236f7972009-04-05 14:28:42 +0000645
Brett Cannonf47e84c2009-04-01 16:06:01 +0000646- Issue #1665206 (partially): Move imports in cgitb to the top of the module
647 instead of performing them in functions. Helps prevent import deadlocking in
648 threads.
649
R. David Murraye59482e2009-04-01 03:42:00 +0000650- Issue #2522: locale.format now checks its first argument to ensure it has
651 been passed only one pattern, avoiding mysterious errors where it appeared
652 that it was failing to do localization.
653
Tarek Ziadéb2e36f12009-03-31 22:37:55 +0000654- Issue #5583: Added optional Extensions in Distutils. Initial patch by Georg
655 Brandl.
656
Antoine Pitrou350370c2009-03-14 00:13:13 +0000657- Issue #1222: locale.format() bug when the thousands separator is a space
658 character.
659
Tarek Ziadé516db942009-03-11 12:52:00 +0000660- Issue #5472: Fixed distutils.test_util tear down. Original patch by
661 Tim Golden.
662
Raymond Hettinger5bb0f0e2009-03-10 12:56:32 +0000663- collections.deque() objects now have a read-only attribute called maxlen.
664
Guilherme Polof45b4cc2009-03-07 02:19:14 +0000665- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
666 it is has been populated and properly configured in order to prevent
667 window flashing.
668
Guilherme Polo56f5be52009-03-07 01:54:57 +0000669- Issue #4792: Prevent a segfault in _tkinter by using the
670 guaranteed to be safe interp argument given to the PythonCmd in place of
671 the Tcl interpreter taken from a PythonCmd_ClientData.
672
673- Issue #5193: Guarantee that tkinter.Text.search returns a string.
674
Tarek Ziadé63b64c02009-03-07 00:51:53 +0000675- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
676 Original patch by Akira Kitada.
677
Hirokazu Yamamoto54d0df62009-03-06 03:04:07 +0000678- Issue #5334: array.fromfile() failed to insert values when EOFError was raised.
679
Hirokazu Yamamoto8e722bc2009-03-05 14:33:01 +0000680- Issue #5385: Fixed mmap crash after resize failure on windows.
681
Hirokazu Yamamoto0c988172009-03-03 22:41:26 +0000682- Issue #5179: Fixed subprocess handle leak on failure on windows.
683
Raymond Hettinger2d32f632009-03-02 21:24:57 +0000684- PEP 372: Added collections.OrderedDict().
685
Raymond Hettingera4f52b12009-03-02 22:28:31 +0000686- The _asdict() for method for namedtuples now returns an OrderedDict().
687
Raymond Hettinger0663a1e2009-03-02 23:06:00 +0000688- configparser now defaults to using an ordered dictionary.
689
Benjamin Petersone0124bd2009-03-09 21:04:33 +0000690- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
691 import guess_extension`` was used.
692
Hirokazu Yamamoto10c99372009-02-28 12:21:53 +0000693- Issue #1733986: Fixed mmap crash in accessing elements of second map object
694 with same tagname but larger size than first map. (Windows)
695
Hirokazu Yamamoto39c6dea2009-02-28 10:56:50 +0000696- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
697 overrun.
698
Tarek Ziadéf0721222009-02-28 10:16:43 +0000699- Issue #1533164: Installed but not listed *.pyo was breaking Distutils
700 bdist_rpm command.
701
702- Issue #5378: added --quiet option to Distutils bdist_rpm command.
703
Tarek Ziadé38e3d512009-02-27 12:58:56 +0000704- Issue #5052: make Distutils compatible with 2.3 again.
705
Tarek Ziadé0f31e6d2009-02-25 22:31:38 +0000706- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
707 in Distutils tests.
Barry Warsawd8ccd1c2008-11-21 15:13:37 +0000708
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000709- Issue #5287: Add exception handling around findCaller() call to help out
710 IronPython.
711
Hirokazu Yamamoto0654ccd2009-02-18 16:38:00 +0000712- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
713 The file was resized to wrong size.
714
715- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
716
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000717- Issue #2279: distutils.sdist.add_defaults now add files
Tarek Ziadé0d0506e2009-02-16 21:49:12 +0000718 from the package_data and the data_files metadata.
719
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000720- Issue #5257: refactored all tests in distutils, so they use
Tarek Ziadéc1375d52009-02-14 14:35:51 +0000721 support.TempdirManager, to avoid writing in the tests directory.
722
Tarek Ziadé68c50952009-02-13 23:04:17 +0000723- Issue #4524: distutils build_script command failed with --with-suffix=3.
724 Initial patch by Amaury Forgeot d'Arc.
725
Tarek Ziadé811d6242009-02-13 22:26:15 +0000726- Issue #2461: added tests for distutils.util
727
Mark Dickinsonc28ad272009-02-12 17:58:36 +0000728- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
729 which inherited from numbers.py which did not have __slots__ defined. The
730 numbers hierarchy now has its own __slots__ declarations.
731
Antoine Pitroub353c122009-02-11 00:39:14 +0000732- Issue #4631: Fix urlopen() result when an HTTP response uses chunked
733 encoding.
734
Thomas Heller465c8022009-02-10 18:59:04 +0000735- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
736 function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
737
Tarek Ziadé7d5e9872009-02-10 12:36:33 +0000738- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
739 under NT and OS2. Patch by Philip Jenvey.
740
Brett Cannonbefb14f2009-02-10 02:10:16 +0000741- Issue #5128: Make compileall properly inspect bytecode to determine if needs
742 to be recreated. This avoids a timing hole thanks to the old reliance on the
743 ctime of the files involved.
744
Guilherme Polob681df42009-02-09 22:33:59 +0000745- Issue #5122: Synchronize tk load failure check to prevent a potential
746 deadlock.
747
Benjamin Petersona86f2c02009-02-10 02:41:10 +0000748- Issue #1818: collections.namedtuple() now supports a keyword argument
749 'rename' which lets invalid fieldnames be automatically converted to
750 positional names in the form, _1, _2, ...
751
Guilherme Poloae098992009-02-09 16:44:24 +0000752- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
753
Nick Coghlan9a1d6e32009-02-08 03:37:27 +0000754- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
755 public documented method ``ZipImporter.get_filename()``.
756
Nick Coghlan3f48ae32009-02-08 01:58:26 +0000757- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
758 the execution of packages by looking for and executing a ``__main__``
759 submodule when a package name is supplied. Initial patch by Andi
760 Vajda.
761
Guilherme Polo491aee22009-02-06 23:16:11 +0000762- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
763 not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
764 Tkapp_Call when calling from a thread different than the one that created
765 the Tcl interpreter. Patch by Robert Hancock.
766
Eric Smith0e5b5622009-02-06 01:32:42 +0000767- Issue #4285: Change sys.version_info to be a named tuple. Patch by
768 Ross Light.
769
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000770- Issue #1520877: Now distutils.sysconfig reads $AR from the
Tarek Ziadéd3409de2009-02-06 01:18:36 +0000771 environment/Makefile. Patch by Douglas Greiman.
772
Tarek Ziadé70a74eb2009-02-06 00:38:35 +0000773- Issue #1276768: The verbose option was not used in the code of
774 distutils.file_util and distutils.dir_util.
775
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000776- Issue #5132: Fixed trouble building extensions under Solaris with
Tarek Ziadé5874ef12009-02-05 22:56:14 +0000777 --enabled-shared activated. Initial patch by Dave Peterson.
778
Guilherme Polo7f423952009-02-02 21:17:09 +0000779- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
780
Raymond Hettinger85602262009-02-03 04:19:10 +0000781- The shelve module now defaults to pickle protocol 3.
782
Brett Cannone61426e2009-01-30 01:31:34 +0000783- Fix a bug in the trace module where a bytes object from co_lnotab had its
784 items being passed through ord().
785
Antoine Pitrou0dcc3cd2009-01-29 20:26:59 +0000786- Issue #2047: shutil.move() could believe that its destination path was
787 inside its source path if it began with the same letters (e.g. "src" vs.
788 "src.new").
789
Guilherme Polo5f238482009-01-28 14:41:10 +0000790- Added the ttk module. See issue #2983: Ttk support for Tkinter.
791
Raymond Hettinger89e12962009-01-26 02:09:03 +0000792- Removed isSequenceType(), isMappingType, and isNumberType() from the
793 operator module; use the abstract base classes instead. Also removed
794 the repeat() function; use mul() instead.
795
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000796- Issue #5021: doctest.testfile() did not create __name__ and
Raymond Hettinger0f055172009-01-27 10:06:09 +0000797 collections.namedtuple() relied on __name__ being defined.
798
799- Backport importlib from Python 3.1. Only the import_module() function has
800 been backported to help facilitate transitions from 2.7 to 3.1.
801
Tarek Ziadé0302cf52009-01-26 17:23:20 +0000802- Issue #1885: distutils. When running sdist with --formats=tar,gztar
803 the tar file was overriden by the gztar one.
804
Tarek Ziadé4d4456f2009-01-25 18:27:45 +0000805- Issue #4863: distutils.mwerkscompiler has been removed.
806
Raymond Hettingerd07d9392009-01-27 04:20:44 +0000807- Added a new itertools functions: combinations_with_replacement()
808 and compress().
Raymond Hettinger6b3b0fc2009-01-26 02:56:58 +0000809
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000810- Issue #5032: added a step argument to itertools.count() and
Raymond Hettinger30729212009-02-12 06:28:27 +0000811 allowed non-integer arguments.
812
Jesse Noller41faa542009-01-25 03:45:53 +0000813- Fix and properly document the multiprocessing module's logging
814 support, expose the internal levels and provide proper usage
815 examples.
816
Mark Dickinsoncddcf442009-01-24 21:46:33 +0000817- Issue #1672332: fix unpickling of subnormal floats, which was
818 producing a ValueError on some platforms.
819
Martin v. Löwisacbf4612009-01-24 16:19:45 +0000820- Issue #3881: Help Tcl to load even when started through the
821 unreadable local symlink to "Program Files" on Vista.
822
Martin v. Löwis59e47792009-01-24 14:10:07 +0000823- Issue #4710: Extract directories properly in the zipfile module;
824 allow adding directories to a zipfile.
825
Vinay Sajipb672b6d2009-02-19 12:36:11 +0000826- Issue #3807: _multiprocessing build fails when configure is passed
Jesse Noller6fd47e22009-01-23 14:09:08 +0000827 --without-threads argument. When this occurs, _multiprocessing will
828 be disabled, and not compiled.
829
Antoine Pitrou08838b62009-01-21 00:55:13 +0000830- Issue #5008: When a file is opened in append mode with the new IO library,
831 do an explicit seek to the end of file (so that e.g. tell() returns the
832 file size rather than 0). This is consistent with the behaviour of the
833 traditional 2.x file object.
834
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000835- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
836 parameter was set.
837
Mark Dickinson8dd05142009-01-20 20:43:58 +0000838- Issue #4842: Always append a trailing 'L' when pickling longs using
839 pickle protocol 0. When reading, the 'L' is optional.
840
Brett Cannonafccd632009-01-20 02:21:27 +0000841- Add the importlib package.
842
Jesse Noller9a0fc972009-01-18 21:12:58 +0000843- Issue #4301: Patch the logging module to add processName support, remove
844 _check_logger_class from multiprocessing.
845
Jesse Noller1cbb17a2009-01-18 19:45:18 +0000846- Issue #3325: Remove python2.x try: except: imports for old cPickle from
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000847 multiprocessing.
Jesse Nollerf70a5382009-01-18 19:44:02 +0000848
Benjamin Peterson9953a8d2009-01-17 04:15:01 +0000849- Issue #4959: inspect.formatargspec now works for keyword only arguments
850 without defaults.
851
Jesse Noller6214edd2009-01-19 16:23:53 +0000852- Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
853 for *nix machines for negative handles and large int handles. Without this check
854 it is possible to segfault the interpreter.
855
Jesse Nollerb0516a62009-01-18 03:11:38 +0000856- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
857 in sharedctypes.py.
858
859- Issue #1225107: inspect.isclass() returned True for instances with a custom
860 __getattr__.
861
Gregory P. Smithde3369f2009-01-12 04:50:11 +0000862- Issue #3826 and #4791: The socket module now closes the underlying socket
863 appropriately when it is being used via socket.makefile() objects
864 rather than delaying the close by waiting for garbage collection to do it.
865
Raymond Hettingerb8baf632009-01-14 02:20:07 +0000866- Issue #1696199: Add collections.Counter() for rapid and convenient
867 counting.
868
Antoine Pitrou308705e2009-01-10 16:22:51 +0000869- Issue #3860: GzipFile and BZ2File now support the context manager protocol.
870
Thomas Heller5e4e4272009-01-08 09:34:20 +0000871- Issue #4867: Fixed a crash in ctypes when passing a string to a
872 function without defining argtypes.
873
Antoine Pitrou42db3ef2009-01-04 21:37:59 +0000874- Issue #4272: Add an optional argument to the GzipFile constructor to override
875 the timestamp in the gzip stream. The default value remains the current time.
876 The information can be used by e.g. gunzip when decompressing. Patch by
877 Jacques Frechet.
878
Mark Dickinson315a20a2009-01-04 21:34:18 +0000879- Restore Python 2.3 compatibility for decimal.py.
880
Guilherme Polo3f5f8222009-01-03 22:00:39 +0000881- Issue #3638: Remove functions from _tkinter module level that depend on
882 TkappObject to work with multiple threads.
883
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000884- Issue #4718: Adapt the wsgiref package so that it actually works with
885 Python 3.x, in accordance with the `official amendments of the spec
Antoine Pitrou38a66ad2009-01-03 18:41:49 +0000886 <http://www.wsgi.org/wsgi/Amendments_1.0>`_.
887
Raymond Hettinger771ed762009-01-03 19:20:32 +0000888- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
889 to the decimal module.
890
Georg Brandl3a9b0622009-01-03 22:07:57 +0000891- Fractions.from_float() no longer loses precision for integers too big to
892 cast as floats.
893
Mark Dickinsonf9236412009-01-02 23:23:21 +0000894- Issue #4812: add missing underscore prefix to some internal-use-only
895 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
896
Georg Brandl1cdd83c2009-04-05 20:24:29 +0000897- Issue #4790: The nsmallest() and nlargest() functions in the heapq module
Georg Brandl3a9b0622009-01-03 22:07:57 +0000898 did unnecessary work in the common case where no key function was specified.
899
Georg Brandlb1441c72009-01-03 22:33:39 +0000900- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
901 the function is not a generator.
902
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000903- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
904 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
Tarek Ziadé9df8ce32008-12-30 23:09:20 +0000905
Vinay Sajip6268cbc2009-01-21 00:19:28 +0000906- Issue #4646: distutils was choking on empty options arg in the setup
Tarek Ziadé4450dcf2008-12-29 22:38:38 +0000907 function. Original patch by Thomas Heller.
908
Martin v. Löwis1f1620e2008-12-29 16:27:13 +0000909- Issue #3767: Convert Tk object to string in tkColorChooser.
910
Martin v. Löwise354d782008-12-29 16:03:04 +0000911- Issue #3248: Allow placing ScrolledText in a PanedWindow.
912
Antoine Pitrou5acd41e2008-12-28 14:29:00 +0000913- Issue #4444: Allow assertRaises() to be used as a context handler, so that
914 the code under test can be written inline if more practical.
915
Georg Brandldb7b6b92009-01-01 15:53:14 +0000916- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
917 works as expected in the interactive environment.
918
Antoine Pitroudb5fe662008-12-27 15:50:40 +0000919- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
920 Gabriel Genellina.
921
Antoine Pitrou180a3362008-12-14 16:36:46 +0000922- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
923 boundary.
924
Nick Coghlanf088e5e2008-12-14 11:50:48 +0000925- Issue #4223: inspect.getsource() will now correctly display source code
926 for packages loaded via zipimport (or any other conformant PEP 302
927 loader). Original patch by Alexander Belopolsky.
928
929- Issue #4201: pdb can now access and display source code loaded via
930 zipimport (or any other conformant PEP 302 loader). Original patch by
931 Alexander Belopolsky.
932
933- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
934 302 conformant loader) will now work correctly in most cases (they
935 are still subject to the constraints that exist for all code running
936 from inside a module loaded via a PEP 302 loader and attempting to
937 perform IO operations based on __file__). Original patch by
938 Alexander Belopolsky.
939
940- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
941 allows backporting to maintenance branches. Original patch by
942 Alexander Belopolsky.
943
Antoine Pitrou7c59bc62008-12-13 23:20:54 +0000944- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
945 a non-ASCII letter.
946
Lars Gustäbel43fcf3a2008-12-12 14:58:38 +0000947- Issue #4616: TarFile.utime(): Restore directory times on Windows.
948
Benjamin Peterson433f32c2008-12-12 01:25:05 +0000949- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
950 codec cannot be found. This is for compatibility with the builtin behavior.
951
Facundo Batista708d5812008-12-11 04:20:07 +0000952- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
953 give correct results in the case where one argument is a quiet NaN
954 and the other is a finite number that requires rounding.
955
Skip Montanaroc1ce2862008-12-06 17:25:02 +0000956- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
957 libs.
958
Georg Brandlf9734072008-12-07 15:30:06 +0000959- Added the subprocess.check_call_output() convenience function to get output
960 from a subprocess on success or raise an exception on error.
961
962- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
963 support unusual filenames (such as those containing semi-colons) in
964 Content-Disposition headers.
965
966- Issue #4384: Added logging integration with warnings module using
967 captureWarnings(). This change includes a NullHandler which does nothing;
968 it will be of use to library developers who want to avoid the "No handlers
969 could be found for logger XXX" message which can appear if the library user
970 doesn't configure logging.
971
972- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
973 exception.
974
Georg Brandleee31162008-12-07 15:15:22 +0000975- Issue #4529: fix the parser module's validation of try-except-finally
976 statements.
977
978- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
979 not a malformed option.
980
981- Added the subprocess.check_output() convenience function to get output
982 from a subprocess on success or raise an exception on error.
983
Amaury Forgeot d'Arcbc9d4742008-12-05 01:40:43 +0000984- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
985 the corresponding tests now pass.
986
Amaury Forgeot d'Arcbc2ce572008-12-05 01:02:21 +0000987- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
988 it was calling the wrong open() function.
989
Fred Drake9a0a65b2008-12-04 19:24:50 +0000990- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
991 support unusual filenames (such as those containing semi-colons) in
992 Content-Disposition headers.
993
Matthias Klose2c7e3ee2009-01-10 17:08:25 +0000994- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
995 biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
996
Benjamin Peterson5c6d7872009-02-06 02:40:07 +0000997- Issue #5104: The socket module now raises OverflowError when 16-bit port and
998 protocol numbers are supplied outside the allowed 0-65536 range on bind()
999 and getservbyport().
1000
Jeroen Ruigrok van der Werven0a866942009-05-08 14:18:00 +00001001- Windows locale mapping updated to Vista.
1002
Antoine Pitrou2a013ea2008-12-27 20:39:28 +00001003Tools/Demos
1004-----------
1005
Antoine Pitrou8a681222009-02-07 17:13:31 +00001006- Issue #4704: remove use of cmp() in pybench, bump its version number to 2.1,
1007 and make it 2.6-compatible.
1008
Guilherme Poloa7d27972009-01-28 16:06:51 +00001009- Ttk demos added in Demo/tkinter/ttk/
1010
Antoine Pitrou2a013ea2008-12-27 20:39:28 +00001011- Issue #4677: add two list comprehension tests to pybench.
1012
Georg Brandlb1441c72009-01-03 22:33:39 +00001013
1014Build
1015-----
1016
Martin v. Löwis8482ef92009-05-05 16:14:30 +00001017- Issue #5847: Remove -n switch on "Edit with IDLE" menu item.
1018
Antoine Pitrou8966c992009-05-01 21:18:27 +00001019- Issue #5726: Make Modules/ld_so_aix return the actual exit code of the
1020 linker, rather than always exit successfully. Patch by Floris Bruynooghe.
1021
Matthias Klose55708cc2009-04-30 08:06:49 +00001022- Issue #4587: Add configure option --with-dbmliborder=db1:db2:... to specify
1023 the order that backends for the dbm extension are checked.
1024
Matthias Klose906785c2009-02-22 23:18:38 +00001025- Link the shared python library with $(MODLIBS).
1026
Martin v. Löwis11f72102009-02-10 13:13:30 +00001027- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
1028
Martin v. Löwisbc186a82009-02-02 15:32:22 +00001029- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
1030
Martin v. Löwise97637d2009-01-11 09:45:11 +00001031- Issue #4895: Use _strdup on Windows CE.
1032
Georg Brandlb1441c72009-01-03 22:33:39 +00001033- Issue #4472: "configure --enable-shared" now works on OSX
1034
1035- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
1036
1037- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
1038
1039- Issue #4289: Remove Cancel button from AdvancedDlg.
1040
1041- Issue #1656675: Register a drop handler for .py* files on Windows.
1042
1043- Issue #4120: Exclude manifest from extension modules in VS2008.
1044
1045- Issue #4091: Install pythonxy.dll in system32 again.
1046
1047- Issue #4018: Disable "for me" installations on Vista.
1048
1049- Issue #3758: Add ``patchcheck`` build target to .PHONY.
1050
1051- Issue #4204: Fixed module build errors on FreeBSD 4.
1052
1053
1054C-API
1055-----
1056
Mark Dickinson21776072009-02-10 16:13:25 +00001057- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
1058 for negative arguments. Previously, it raised TypeError.
1059
Georg Brandlb1441c72009-01-03 22:33:39 +00001060- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
1061
1062- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
1063 the GIL is released, or owned by another thread.
1064
1065- Issue #4122: On Windows, fix a compilation error when using the
1066 Py_UNICODE_ISSPACE macro in an extension module.
1067
1068
Mark Dickinsone675f082008-12-11 21:56:00 +00001069Extension Modules
1070-----------------
1071
Gregory P. Smith365a1862009-02-12 07:35:29 +00001072- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
1073 supporting objects as input no matter how it was compiled (built in
1074 implementations or external openssl library).
1075
Mark Dickinson29500f62009-01-15 15:36:10 +00001076- Issue #4397: Fix occasional test_socket failure on OS X.
1077
Martin v. Löwisa9b54c72009-01-11 09:30:50 +00001078- Issue #4279: Fix build of parsermodule under Cygwin.
1079
Antoine Pitroubcd5cbe2009-01-08 21:17:16 +00001080- Issue #4751: hashlib now releases the GIL when hashing large buffers
1081 (with a hardwired threshold of 2048 bytes), allowing better parallelization
1082 on multi-CPU systems. Contributed by Lukas Lueg (ebfe) and Victor Stinner.
1083
Martin v. Löwis5c88d812009-01-02 20:47:48 +00001084- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
1085
Antoine Pitrou31f30b12009-01-02 17:34:35 +00001086- Issue #4738: Each zlib object now has a separate lock, allowing to compress
1087 or decompress several streams at once on multi-CPU systems. Also, the GIL
1088 is now released when computing the CRC of a large buffer. Patch by ebfe.
1089
Georg Brandlb1441c72009-01-03 22:33:39 +00001090- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
1091
Martin v. Löwis05bfe1f2008-12-29 18:21:47 +00001092- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
1093
Mark Dickinsone675f082008-12-11 21:56:00 +00001094- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
1095 OpenBSD.
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +00001096
Antoine Pitrou3ad3a0d2008-12-18 17:08:32 +00001097- Issue #4583: array.array would not always prohibit resizing when a buffer
1098 has been exported, resulting in an interpreter crash when accessing the
1099 buffer.
1100
Martin v. Löwis841edad2008-11-30 10:36:49 +00001101
Jack Diederiche0cbd692009-04-01 04:27:09 +00001102- Issue #5228: Make functools.partial objects can now be pickled.
1103
Guilherme Polo9de29af2009-01-28 20:40:48 +00001104Tests
1105-----
1106
R. David Murraya21e4ca2009-03-31 23:16:50 +00001107- regrtest no longer treats ImportError as equivalent to SkipTest. Imports
Vinay Sajipad5fa2f2009-04-27 13:55:05 +00001108 that should cause a test to be skipped are now done using import_module
R. David Murraya21e4ca2009-03-31 23:16:50 +00001109 from test support, which does the conversion.
1110
Guilherme Polo9de29af2009-01-28 20:40:48 +00001111- Issue #5083: New 'gui' resource for regrtest.
1112
1113
Brett Cannon7317c1e2008-11-25 19:19:17 +00001114Docs
1115----
1116
Georg Brandl52b92cc2008-05-25 09:43:03 +00001117
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001118**(For information about older versions, consult the HISTORY file.)**