blob: 7a833a311218c90bb736d6314954cc71b7856a5e [file] [log] [blame]
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001+++++++++++
2Python News
3+++++++++++
4
Anthony Baxterb0c66302004-11-04 05:23:17 +00005(editors: check NEWS.help for information about editing NEWS using ReST.)
6
Barry Warsawd8ccd1c2008-11-21 15:13:37 +00007What's New in Python 3.0 final
8==============================
9
10*Release date: XX-XXX-2008*
11
12Core and Builtins
13-----------------
14
Amaury Forgeot d'Arcb0c29162008-11-22 22:18:04 +000015- Issue #3996: On Windows, the PyOS_CheckStack function would cause the
16 interpreter to abort ("Fatal Python error: Could not reset the stack!")
17 instead of throwing a MemoryError.
18
19- Issue #4367: Python would segfault during compiling when the unicodedata
20 module couldn't be imported and \N escapes were present.
21
Matthias Klose7e1b8fa2008-11-26 17:22:04 +000022- Fix build failure of _cursesmodule.c building with -D_FORTIFY_SOURCE=2.
23
Barry Warsawd8ccd1c2008-11-21 15:13:37 +000024Library
25-------
26
Amaury Forgeot d'Arcbed17102008-11-29 01:48:47 +000027- IDLE would print a "Unhandled server exception!" message when internal
28 debugging is enabled.
29
Amaury Forgeot d'Arc47c2b602008-11-28 23:28:42 +000030- Issue #4455: IDLE failed to display the windows list when two windows have
31 the same title.
32
Christian Heimes94e07722008-11-28 11:05:17 +000033- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
34 exception.
35
Thomas Heller60e5f5e2008-11-26 18:40:58 +000036- Issue #4433: Fixed an access violation when garbage collecting
37 _ctypes.COMError instances.
38
Thomas Heller71fb5132008-11-26 08:45:36 +000039- Issue #4429: Fixed UnicodeDecodeError in ctypes.
40
Christian Heimes3e7e0692008-11-25 21:21:32 +000041- Issue #4373: Corrected a potential reference leak in the pickle module and
42 silenced a false positive ref leak in distutils.tests.test_build_ext.
Amaury Forgeot d'Arc5f952572008-11-25 21:11:54 +000043
Brett Cannon2b5d6eb2008-11-24 21:09:58 +000044- Issue #4382: dbm.dumb did not specify the expected file encoding for opened
45 files.
46
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +000047- Issue #4383: When IDLE cannot make the connection to its subprocess, it would
48 fail to properly display the error message.
49
Brett Cannon7317c1e2008-11-25 19:19:17 +000050Docs
51----
52
Christian Heimes7ca7cb42008-11-28 11:24:16 +000053- Issue #4449: Fixed multiprocessing examples
54
Brett Cannon7317c1e2008-11-25 19:19:17 +000055- Issue #3799: Document that dbm.gnu and dbm.ndbm will accept string arguments
56 for keys and values which will be converted to bytes before committal.
57
Barry Warsawd8ccd1c2008-11-21 15:13:37 +000058
59What's New in Python 3.0 release candidate 3?
60=============================================
Barry Warsawa7c37302008-11-07 03:46:33 +000061
Barry Warsaw43baef42008-11-21 01:18:21 +000062*Release date: 20-Nov-2008*
Barry Warsawa7c37302008-11-07 03:46:33 +000063
Benjamin Peterson6570d072008-11-07 03:51:42 +000064
Barry Warsawa7c37302008-11-07 03:46:33 +000065Core and Builtins
66-----------------
67
Benjamin Peterson4f39d222008-11-18 22:37:15 +000068- Issue #4349: sys.path included a non-existent platform directory because of a
69 faulty Makefile.
70
Martin v. Löwis276c3712008-11-17 16:22:11 +000071- Issue #3327: Don't overallocate in the modules_by_index list.
72
Raymond Hettinger7d99f092008-11-16 11:44:54 +000073- Issue #1721812: Binary set operations and copy() returned the input type
Brett Cannon58425d32008-11-21 00:17:53 +000074 instead of the appropriate base type. This was incorrect because set
Raymond Hettinger7d99f092008-11-16 11:44:54 +000075 subclasses would be created without their __init__() method being called.
76 The corrected behavior brings sets into line with lists and dicts.
77
Mark Dickinson4a1f5932008-11-12 23:23:36 +000078- Issue #4296: Fix PyObject_RichCompareBool so that "x in [x]" evaluates to
79 True, even when x doesn't compare equal to itself. This was a regression
80 from 2.6.
81
Amaury Forgeot d'Arc9a5499b2008-11-11 23:04:59 +000082- Issue #3705: Command-line arguments were not correctly decoded when the
83 terminal does not use UTF8.
84
Barry Warsawa7c37302008-11-07 03:46:33 +000085Library
86-------
87
Amaury Forgeot d'Arcb0c29162008-11-22 22:18:04 +000088- Issue #4363: The uuid.uuid1() and uuid.uuid4() functions now work even if
89 the ctypes module is not present.
90
Benjamin Peterson44309e62008-11-22 00:41:45 +000091- FileIO's mode attribute now always includes ``"b"``.
92
Brett Cannon58425d32008-11-21 00:17:53 +000093- Issue #3799: Fix dbm.dumb to accept strings as well as bytes for keys. String
94 keys are now written out in UTF-8.
95
Amaury Forgeot d'Arc836b6702008-11-20 23:53:46 +000096- Issue #4338: Fix distutils upload command.
97
Martin v. Löwis2d1ca2d2008-11-20 16:21:55 +000098- Issue #4354: Fix distutils register command.
99
Martin v. Löwis22d297b2008-11-19 09:14:30 +0000100- Issue #4116: Resolve member name conflict in ScrolledCanvas.__init__.
101
Benjamin Peterson3d4ca742008-11-12 21:39:01 +0000102- Issue #4307: The named tuple that ``inspect.getfullargspec()`` returns now
103 uses ``kwonlydefaults`` instead of ``kwdefaults``.
104
Amaury Forgeot d'Arc3e4e72f2008-11-11 20:05:06 +0000105- Issue #4298: Fix a segfault when pickle.loads is passed a ill-formed input.
106
107- Issue #4283: Fix a left-over "iteritems" call in distutils.
Georg Brandlda066062008-11-08 15:15:57 +0000108
Martin v. Löwisbfda5442008-11-07 18:54:51 +0000109Build
110-----
111
Martin v. Löwisa632a752008-11-19 13:55:07 +0000112- Issue #4289: Remove Cancel button from AdvancedDlg.
113
Martin v. Löwisbfda5442008-11-07 18:54:51 +0000114- Issue #1656675: Register a drop handler for .py* files on Windows.
115
Benjamin Peterson06fd5f82008-11-08 17:24:34 +0000116Tools/Demos
117-----------
118
119- Demos of the socketserver module now work with Python 3.
120
Barry Warsawa7c37302008-11-07 03:46:33 +0000121
Barry Warsaw1f0e67e2008-11-06 03:29:32 +0000122What's New in Python 3.0 release candidate 2
123============================================
Guido van Rossumf0af3e32008-10-02 18:55:37 +0000124
Barry Warsaw1f0e67e2008-11-06 03:29:32 +0000125*Release date: 05-Nov-2008*
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +0000126
127Core and Builtins
128-----------------
129
Benjamin Petersond968e272008-11-05 22:48:33 +0000130- Issue #4211: The __path__ attribute of frozen packages is now a list instead
131 of a string as required by PEP 302.
132
Benjamin Peterson93ef79c2008-11-05 22:49:09 +0000133- Issue #3727: Fixed poplib.
Christian Heimesd3956292008-11-05 19:48:27 +0000134
Christian Heimes933238a2008-11-05 19:44:21 +0000135- Issue #3714: Fixed nntplib by using bytes where appropriate.
136
Christian Heimesfb5faf02008-11-05 19:39:50 +0000137- Issue #1210: Fixed imaplib and its documentation.
138
Christian Heimesecc42a22008-11-05 19:30:32 +0000139- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
140 method on file objects with closefd=False. The file descriptor is still
141 kept open but the file object behaves like a closed file. The ``FileIO``
142 object also got a new readonly attribute ``closefd``.
143
Amaury Forgeot d'Arcdd8059f2008-10-30 23:03:32 +0000144- Issue #3626: On cygwin, starting python with a non-existent script name
145 would not display anything if the file name is only 1 character long.
146
Amaury Forgeot d'Arc424b4812008-10-30 22:25:31 +0000147- Issue #4176: Fixed a crash when pickling an object which ``__reduce__``
148 method does not return iterators for the 4th and 5th items.
149
Amaury Forgeot d'Arcdd8059f2008-10-30 23:03:32 +0000150- Issue #3723: Fixed initialization of subinterpreters.
Christian Heimes6a27efa2008-10-30 21:48:26 +0000151
Christian Heimes5833a2f2008-10-30 21:40:04 +0000152- Issue #4213: The file system encoding is now normalized by the
153 codec subsystem, for example UTF-8 is turned into utf-8.
154
Christian Heimes9c94ba42008-10-30 21:34:02 +0000155- Issue #4200: Changed the atexit module to store its state in its
156 PyModuleDef atexitmodule. This fixes a bug with multiple subinterpeters.
157
Christian Heimesfec925b2008-10-30 21:22:55 +0000158- Issue #4237: io.FileIO() was raising invalid warnings caused by
159 insufficient initialization of PyFileIOObject struct members.
160
Amaury Forgeot d'Arcf43ee812008-10-30 20:58:42 +0000161- Issue #4170: Pickling a collections.defaultdict object would crash the
162 interpreter.
163
Benjamin Peterson08a8f5f2008-10-19 14:15:00 +0000164- Issue #4146: Compilation on OpenBSD has been restored.
165
Brett Cannonda780432008-10-17 03:38:50 +0000166- Issue #3574: compile() incorrectly handled source code encoded as Latin-1.
167
Amaury Forgeot d'Arccf8016a2008-10-09 23:37:48 +0000168- Issues #2384 and #3975: Tracebacks were not correctly printed when the
169 source file contains a ``coding:`` header: the wrong line was displayed, and
170 the encoding was not respected.
171
Martin v. Löwis4e0630c2008-10-07 13:16:28 +0000172- Issue #3740: Null-initialize module state.
173
Benjamin Peterson60320cb2008-09-26 21:49:22 +0000174- Issue #3946: PyObject_CheckReadBuffer crashed on a memoryview object.
175
Amaury Forgeot d'Arcd0db98f2008-09-21 21:49:01 +0000176- Issue #1688: On Windows, the input() prompt was not correctly displayed if it
177 contains non-ascii characters.
178
Martin v. Löwis6fea2332008-09-25 04:15:27 +0000179- Bug #3951: Py_USING_MEMORY_DEBUGGER should not be enabled by default.
180
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +0000181Library
182-------
183
Amaury Forgeot d'Arc87eee632008-10-17 20:15:53 +0000184- Issue #3664: The pickle module could segfault if a subclass of Pickler fails
185 to call the base __init__ method.
186
187- Issue #3725: telnetlib now works completely in bytes.
Benjamin Peterson3de7fb82008-10-15 20:54:24 +0000188
Martin v. Löwis33b64502008-10-15 05:58:17 +0000189- Issue #4072: Restore build_py_2to3.
190
Martin v. Löwisd8506df2008-10-06 15:19:21 +0000191- Issue #4014: Don't claim that Python has an Alpha release status, in addition
192 to claiming it is Mature.
193
Martin v. Löwis04dc25c2008-10-03 16:09:28 +0000194- Issue #3187: Add sys.setfilesystemencoding.
195
Guido van Rossumf0af3e32008-10-02 18:55:37 +0000196- Issue #3187: Better support for "undecodable" filenames. Code by Victor
197 Stinner, with small tweaks by GvR.
198
Martin v. Löwis601149b2008-09-29 22:19:08 +0000199- Issue #3965: Allow repeated calls to turtle.Screen, by making it a
200 true singleton object.
201
Benjamin Peterson3a53fbb2008-09-27 22:04:16 +0000202- Issue #3911: ftplib.FTP.makeport() could give invalid port numbers.
203
Amaury Forgeot d'Arcb5cf3012008-09-25 22:27:43 +0000204- Issue #3929: When the database cannot be opened, dbm.open() would incorrectly
205 raise a TypeError: "'tuple' object is not callable" instead of the expected
206 dbm.error.
207
Martin v. Löwis60ebb8b2008-09-21 07:32:10 +0000208- Bug #3884: Make the turtle module toplevel again.
209
Thomas Heller1308c262008-09-24 19:01:29 +0000210- Issue #3547: Fixed ctypes structures bitfields of varying integer
211 sizes.
212
Gerhard Häring6117f422008-09-22 06:04:51 +0000213Extension Modules
214-----------------
215
216- Issue #3659: Subclasses of str didn't work as SQL parameters.
217
Martin v. Löwisf63921f2008-10-13 11:30:30 +0000218Build
219-----
220
Martin v. Löwis900646e2008-11-06 17:30:03 +0000221- Issue #4120: Exclude manifest from extension modules in VS2008.
222
Martin v. Löwisc820eaf2008-10-17 13:47:20 +0000223- Issue #4091: Install pythonxy.dll in system32 again.
224
Martin v. Löwisf63921f2008-10-13 11:30:30 +0000225- Issue #4018: Disable "for me" installations on Vista.
226
Martin v. Löwisb37509b2008-11-04 20:45:29 +0000227- Issue #4204: Fixed module build errors on FreeBSD 4.
228
Martin v. Löwis33b64502008-10-15 05:58:17 +0000229Tools/Demos
230-----------
231
Martin v. Löwis869bad92008-10-17 15:54:44 +0000232- Issue #3717: Fix Demo/embed/demo.c.
233
Martin v. Löwis33b64502008-10-15 05:58:17 +0000234- Issue #4072: Add a distutils demo for build_py_2to3.
235
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +0000236
Barry Warsaw8509df72008-08-21 03:02:47 +0000237What's New in Python 3.0 release candidate 1
238============================================
239
Barry Warsawb8854802008-09-18 03:00:28 +0000240*Release date: 17-Sep-2008*
Barry Warsaw8509df72008-08-21 03:02:47 +0000241
242Core and Builtins
243-----------------
244
Benjamin Peterson5e19e442008-09-10 21:47:03 +0000245- Issue #3827: memoryview lost its size attribute in favor of using len(view).
246
Hirokazu Yamamoto167b12b2008-09-09 14:01:25 +0000247- Issue #3813: could not lanch python.exe via symbolic link on cygwin.
248
Antoine Pitrou5651eaa2008-09-06 20:46:58 +0000249- Issue #3705: fix crash when given a non-ascii value on the command line for
Amaury Forgeot d'Arc8530e852008-09-09 07:28:22 +0000250 the "-c" and "-m" parameters. Now the behaviour is as expected under Linux,
251 although under Windows it fails at a later point.
Antoine Pitrou5651eaa2008-09-06 20:46:58 +0000252
Benjamin Peterson791dc2f2008-09-05 23:27:15 +0000253- Issue #3279: Importing site at interpreter was failing silently because the
254 site module uses the open builtin which was not initialized at the time.
255
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +0000256- Issue #3660: Corrected a reference leak in str.encode() when the encoder
257 does not return a bytes object.
258
259- Issue #3774: Added a few more checks in PyTokenizer_FindEncoding to handle
Amaury Forgeot d'Arc1b933ed2008-09-04 22:34:09 +0000260 error conditions.
261
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +0000262- Issue #3594: Fix Parser/tokenizer.c:fp_setreadl() to open the file being
Brett Cannon8a9583e2008-09-04 05:04:25 +0000263 tokenized by either a file path or file pointer for the benefit of
264 PyTokenizer_FindEncoding().
265
Antoine Pitroufff95302008-09-03 18:58:51 +0000266- Issue #3696: Error parsing arguments on OpenBSD <= 4.4 and Cygwin. On
267 these systems, the mbstowcs() function is slightly buggy and must be
268 replaced with strlen() for the purpose of counting of number of wide
269 characters needed to represent the multi-byte character string.
270
Antoine Pitrou658fad82008-09-03 18:34:34 +0000271- Issue #3697: "Fatal Python error: Cannot recover from stack overflow"
272 could be easily encountered under Windows in debug mode when exercising
273 the recursion limit checking code, due to bogus handling of recursion
274 limit when USE_STACKCHEK was enabled.
275
Brett Cannon54bd41d2008-09-02 04:01:42 +0000276- Issue 3639: The _warnings module could segfault the interpreter when
277 unexpected types were passed in as arguments.
278
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +0000279- Issue #3712: The memoryview object had a reference leak and didn't support
280 cyclic garbage collection.
281
Antoine Pitrouf71995782008-08-29 18:37:05 +0000282- Issue #3668: Fix a memory leak with the "s*" argument parser in
283 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
284 was correctly parsed but parsing of subsequent arguments failed.
285
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +0000286- Issue #3611: An exception __context__ could be cleared in a complex pattern
287 involving a __del__ method re-raising an exception.
288
Antoine Pitrouec569b72008-08-26 22:40:48 +0000289- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
290 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
291 mechanism. In the process, fix a bug where isinstance() and issubclass(),
292 when given a tuple of classes as second argument, were looking up
293 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
294 type object.
295
Antoine Pitroue2dffc02008-08-26 22:02:58 +0000296- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
297
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +0000298- Issue #3651: Fix various memory leaks when using the buffer
299 interface, or when the "s#" code of PyArg_ParseTuple is given a
300 bytes object.
301
Neal Norwitz6ae2eb22008-08-24 23:50:08 +0000302- Issue #3657: Fix uninitialized memory read when pickling longs.
303 Found by valgrind.
304
Neal Norwitz3ce5d922008-08-24 07:08:55 +0000305- Apply security patches from Apple.
306
Neal Norwitz2f99b242008-08-24 05:48:10 +0000307- Fix crashes on memory allocation failure found with failmalloc.
308
309- Fix memory leaks found with valgrind and update suppressions file.
310
311- Fix compiler warnings in opt mode which would lead to invalid memory reads.
312
313- Fix problem using wrong name in decimal module reported by pychecker.
314
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +0000315- Issue #3650: Fixed a reference leak in bytes.split('x').
316
Benjamin Petersonc15a0732008-08-26 16:46:47 +0000317- bytes(o) now tries to use o.__bytes__() before using fallbacks.
318
Gregory P. Smith207f2112008-09-07 06:29:10 +0000319- Issue #1204: The configure script now tests for additional libraries
320 that may be required when linking against readline. This fixes issues
321 with x86_64 builds on some platforms (a few Linux flavors and OpenBSD).
322
Benjamin Petersonc15a0732008-08-26 16:46:47 +0000323C API
324-----
325
326- PyObject_Bytes and PyBytes_FromObject were added.
327
Barry Warsaw8509df72008-08-21 03:02:47 +0000328Library
329-------
330
Guido van Rossum698280d2008-09-10 17:44:35 +0000331- Issue #3756: make re.escape() handle bytes as well as str.
332
Georg Brandl7cd67cc2008-09-09 19:31:25 +0000333- Issue #3800: fix filter() related bug in formatter.py.
334
Antoine Pitrou5fe291f2008-09-06 23:00:03 +0000335- Issue #874900: fix behaviour of threading module after a fork.
336
Antoine Pitrou9e4fdf42008-09-05 23:43:02 +0000337- Issue #3535: zipfile couldn't read some zip files larger than 2GB.
338
339- Issue #3776: Deprecate the bsddb package for removal in 3.0.
340
341- Issue #3762: platform.architecture() fails if python is lanched via
342 its symbolic link.
343
Antoine Pitroud79dc622008-09-05 00:03:33 +0000344- Issue #3660: fix a memory leak in the C accelerator of the pickle module.
345
Antoine Pitrou1d6a16b2008-09-04 21:32:09 +0000346- Issue #3160: the "bdist_wininst" distutils command didn't work.
347
Guilherme Polob212b752008-09-04 11:21:31 +0000348- Issue #1658: tkinter changes dict size during iteration in both
349 tkinter.BaseWidget and tkinter.scrolledtext.ScrolledText.
350
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000351- The bsddb module (and therefore the dbm.bsd module) has been removed.
Gregory P. Smith451e99b2008-09-04 04:46:48 +0000352 It is now maintained outside of the standard library at
353 http://www.jcea.es/programacion/pybsddb.htm.
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000354
Facundo Batistac469d4c2008-09-03 22:49:01 +0000355- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
356 to the urlparse one. Added a DeprecationWarning in the old module, it
357 will be deprecated in the future.
358
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +0000359- Issue #3719: platform.architecture() fails if there are spaces in the
360 path to the Python binary.
361
Brett Cannonec92e182008-09-02 02:46:59 +0000362- Issue 3602: As part of the merge of r66135, make the parameters on
363 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
364
Benjamin Petersonb3085c92008-09-01 23:09:31 +0000365- The deprecation warnings for the camelCase threading API names were removed.
366
Jesse Noller338f5782008-09-03 18:22:19 +0000367- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
368 SEM_VALUE_MAX.
369
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000370Extension Modules
371-----------------
372
Antoine Pitrou9cadb1b2008-09-15 23:02:56 +0000373- Issue #3782: os.write() must not accept unicode strings.
374
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +0000375- Issue #2975: When compiling several extension modules with Visual Studio 2008
376 from the same python interpreter, some environment variables would grow
377 without limit.
378
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000379- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
380 exploitation of poor argument checking.
381
Jesus Cea6ba33292008-08-31 14:12:11 +0000382- bsddb code updated to version 4.7.3pre2. This code is the same than
383 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
384 The Python code is automatically translated using "2to3". Please, do not
385 update this code in Python 3.0 by hand. Update the 2.6 one and then
386 do "2to3".
387
Benjamin Peterson791dc2f2008-09-05 23:27:15 +0000388- The _bytesio and _stringio modules are now compiled into the python binary.
389
Gregory P. Smith693fc462008-09-06 20:13:06 +0000390- Issue #3492 and #3790: Fixed the zlib module and zipimport module uses of
391 mutable bytearray objects where they should have been using immutable bytes.
392
Gregory P. Smith0a608fd2008-09-06 21:34:51 +0000393- Issue #3797: Fixed the dbm, marshal, mmap, ossaudiodev, & winreg modules to
394 return bytes objects instead of bytearray objects.
395
Gregory P. Smith693fc462008-09-06 20:13:06 +0000396
Neal Norwitz8f2f22a2008-08-24 20:59:23 +0000397Tools/Demos
398-----------
399
400- Fix Misc/gdbinit so it works.
401
Barry Warsaw8509df72008-08-21 03:02:47 +0000402
Amaury Forgeot d'Arcf7bfcfb2008-09-09 06:42:00 +0000403Build
404-----
405
Hirokazu Yamamoto54a1cc62008-09-09 17:55:11 +0000406- Issue #3812: Failed to build python if configure --without-threads.
407
Amaury Forgeot d'Arcf7bfcfb2008-09-09 06:42:00 +0000408- Issue #3791: Remove the bsddb module from the Windows installer, and the
409 core bsddb library from the Windows build files.
410
411
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000412What's new in Python 3.0b3?
413===========================
414
Barry Warsaw57c10582008-08-21 02:39:51 +0000415*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000416
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000417Core and Builtins
418-----------------
419
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000420- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
421 arguments.
422
Antoine Pitrou616d2852008-08-19 22:09:34 +0000423- Issue #2394: implement more of the memoryview API, with the caveat that
424 only one-dimensional contiguous buffers are supported and exercised right
425 now. Slicing, slice assignment and comparison (equality and inequality)
426 have been added. Also, the tolist() method has been implemented, but only
427 for byte buffers. Endly, the API has been updated to return bytes objects
428 wherever it used to return bytearrays.
429
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000430- Issue #3560: clean up the new C PyMemoryView API so that naming is
431 internally consistent; add macros PyMemoryView_GET_BASE() and
432 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
433 without relying on a particular implementation; remove the ill-named
434 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
435
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000436- ctypes function pointers that are COM methods have a boolean True
437 value again.
438
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000439- Issue #1819: function calls with several named parameters are now on
440 average 35% faster (as measured by pybench).
441
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000442- The undocumented C APIs PyUnicode_AsString() and
443 PyUnicode_AsStringAndSize() were made private to the interpreter, in
444 order to be able to refine their interfaces for Python 3.1.
445
446 If you need to access the UTF-8 representation of a Unicode object
447 as bytes string, please use PyUnicode_AsUTF8String() instead.
448
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000449- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
450 to Python 3.0's stricter semantics which allow to avoid successive
451 reallocations of the result string (this also affects str.join()).
452
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000453
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000454Library
455-------
456
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000457- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
458 a build problem on MacOS with CJK locales. It adds four temporary
459 mappings to existing legacy codecs that are virtually compatible
460 with Mac encodings. They will be replaced by codecs correctly
461 implemented in 3.1.
462
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000463- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
464 "global name 'header' is not defined".
465
Antoine Pitroufd036452008-08-19 17:56:33 +0000466- Issue #2834: update the regular expression library to match the unicode
467 standards of py3k. In other words, mixing bytes and unicode strings
468 (be it as pattern, search string or replacement string) raises a TypeError.
469 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
470 and can be disabled by specifying a new re.ASCII flag; as for bytes
471 patterns, ASCII matching is the only option and trying to specify re.UNICODE
472 for such patterns raises a ValueError.
473
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000474- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
475 Code contributed by Matt Giuca. quote() now encodes the input
476 before quoting, unquote() decodes after unquoting. There are
477 new arguments to change the encoding and errors settings.
478 There are also new APIs to skip the encode/decode steps.
479 [un]quote_plus() are also affected.
480
Nick Coghlan36f49522008-08-18 12:31:52 +0000481- Issue #2235: numbers.Number now blocks inheritance of the default id()
482 based hash because that hash mechanism is not correct for numeric types.
483 All concrete numeric types that inherit from Number (rather than just
484 registering with it) must explicitly provide a hash implementation in
485 order for their instances to be hashable.
486
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000487- Issue #2676: in the email package, content-type parsing was hanging on
488 pathological input because of quadratic or exponential behaviour of a
489 regular expression.
490
Antoine Pitrou87695762008-08-14 22:44:29 +0000491- Issue #3476: binary buffered reading through the new "io" library is now
492 thread-safe.
493
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000494- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
495 menu entries were not deleted.
496
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000497- Remove the TarFileCompat class from tarfile.py.
498
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000499- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
500 accepts the same parameters. It just checks that its first argument is an
501 integer.
502
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000503- Issue #3394: zipfile.writestr sets external attributes when passed a
504 file name rather than a ZipInfo instance, so files are extracted with
505 mode 0600 rather than 000 under Unix.
506
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000507- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
508 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000509
Martin v. Löwis371bb502008-08-16 13:02:57 +0000510Extension Modules
511-----------------
512
513- Bug #3542: Support Unicode strings in _msi module.
514
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000515What's new in Python 3.0b2?
516===========================
517
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000518*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000519
520Core and Builtins
521-----------------
522
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000523- Issue #3008: the float type has a new instance method 'float.hex'
524 and a new class method 'float.fromhex' to convert floating-point
525 numbers to and from hexadecimal strings, respectively.
526
Eric Smithd68af8f2008-07-16 00:15:35 +0000527- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
528 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
529
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000530- Issue #3280: like chr(), the "%c" format now accepts unicode code points
531 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
532 "narrow Unicode" builds, the result is a string of 2 code units, forming a
533 UTF-16 surrogate pair.
534
Georg Brandld52429f2008-07-04 15:55:02 +0000535- Issue #3282: str.isprintable() should return False for undefined
536 Unicode characters.
537
Martin v. Löwis029656f2008-06-30 04:06:08 +0000538- Issue #3236: Return small longs from PyLong_FromString.
539
Benjamin Petersone6528212008-07-15 15:32:09 +0000540- Exception tracebacks now support exception chaining.
541
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000542Library
543-------
544
Brett Cannonc2542e92008-07-25 18:19:20 +0000545- Removed the sunaudio module. Use sunau instead.
546
Thomas Heller47bc8092008-08-19 06:38:12 +0000547- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
548 api functions without holding the GIL, which could lead to a fatal
549 error when they failed.
550
551- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
552
Georg Brandl30704ea02008-07-23 15:07:12 +0000553- Removed "ast" function aliases from the parser module.
554
Thomas Heller15383a02008-07-15 19:46:52 +0000555- Issue #3313: Fixed a crash when a failed dlopen() call does not set
556 a valid dlerror() message.
557
Thomas Heller0261e1e2008-07-15 17:25:07 +0000558- Issue #3258: Fixed a crash when a ctypes POINTER type to an
559 incomplete structure was created.
560
Georg Brandl1abcbf82008-07-01 19:28:43 +0000561- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
562 argument now must be a bytes object in any case.
563
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000564- Issue #3145: help("modules whatever") failed when trying to load the source
565 code of every single module of the standard library, including invalid files
566 used in the test suite.
567
Georg Brandlbded4d32008-07-17 18:15:35 +0000568- The gettext library now consistently uses Unicode strings for message ids
569 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000570
Benjamin Petersone6528212008-07-15 15:32:09 +0000571- The traceback module has been expanded to handle chained exceptions.
572
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000573C API
574-----
575
576- Issue #3247: the function Py_FindMethod was removed. Modern types should
577 use the tp_methods slot instead.
578
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000579Tools/Demos
580-----------
581
Georg Brandl336341f2008-07-01 20:21:28 +0000582- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000583
Georg Brandl336341f2008-07-01 20:21:28 +0000584- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000585
586
Brett Cannon0d71ee72008-05-08 18:13:40 +0000587What's new in Python 3.0b1?
588===========================
589
Barry Warsawc1e689e2008-06-19 00:35:43 +0000590*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000591
592Core and Builtins
593-----------------
594
Brett Cannondb734912008-06-27 00:52:15 +0000595- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
596 argument being anything other than a dict or None. Also fixed a bug in error
597 handling when 'message' and 'category' were both set to None, triggering a
598 bus error.
599
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000600- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
601 holds the last (strong) reference to its referent.
602
Georg Brandl559e5d72008-06-11 18:37:52 +0000603- Issue #2630: implement PEP 3138. repr() now returns printable
604 Unicode characters unescaped, to get an ASCII-only representation
605 of an object use ascii().
606
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000607- Issue #1342: On windows, Python could not start when installed in a
608 directory with non-ascii characters.
609
Martin v. Löwis1a214512008-06-11 05:26:20 +0000610- Implement PEP 3121: new module initialization and finalization API.
611
Georg Brandle1b5ac62008-06-04 13:06:58 +0000612- Removed the already-defunct ``-t`` option.
613
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000614- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
615 unmarshalling many code objects, which happens when importing a
616 large .pyc file (~1000 functions).
617
Georg Brandl52b92cc2008-05-25 09:43:03 +0000618- Issue #2963: fix merging oversight that disabled method cache for
619 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000620
Georg Brandlc9b09532008-05-25 09:24:38 +0000621- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
622
Georg Brandl52b92cc2008-05-25 09:43:03 +0000623- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000624
Georg Brandl52b92cc2008-05-25 09:43:03 +0000625- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
626 code now allows any unicode string and returns a utf-8 encoded
627 buffer, just like the "s#" code already does. The "z" code was
628 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000629
Georg Brandl52b92cc2008-05-25 09:43:03 +0000630- Issue #2863: generators now have a ``gen.__name__`` attribute that
631 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
632 ``func.func_code.co_name``. The repr() of a generator now also
633 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000634
635- Issue #2831: enumerate() now has a ``start`` argument.
636
Georg Brandl52b92cc2008-05-25 09:43:03 +0000637- Issue #2801: fix bug in the float.is_integer method where a
638 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000639
Georg Brandl52b92cc2008-05-25 09:43:03 +0000640- The ``--with-toolbox-glue`` option (and the associated
641 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000642
Georg Brandl52b92cc2008-05-25 09:43:03 +0000643- Issue #2196: hasattr() now lets exceptions which do not inherit
644 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
645 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000646
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000647- #3021 Exception reraising sematics have been significantly improved. However,
648 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
649 code anymore.
650
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000651- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
652 removed.
653
Brett Cannon0d71ee72008-05-08 18:13:40 +0000654Extension Modules
655-----------------
656
Georg Brandl38feaf02008-05-25 07:45:51 +0000657- Renamed ``_winreg`` module to ``winreg``.
658
Georg Brandl52b92cc2008-05-25 09:43:03 +0000659- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
660 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000661
662- Support for Windows 9x has been removed from the winsound module.
663
Georg Brandl52b92cc2008-05-25 09:43:03 +0000664- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000665
Brett Cannon0d71ee72008-05-08 18:13:40 +0000666Library
667-------
668
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000669- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
670 symtable.Symbol have been removed.
671
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000672- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
673
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000674- a new ``urllib`` package was created. It consists of code from
675 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
676 modules have all been removed. The new package has five submodules:
677 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
678 ``urllib.error``, and ``urllib.robotparser``. The
679 ``urllib.request.urlopen()`` function uses the url opener from
680 ``urllib2``. (Note that the unittests have not been renamed for the
681 beta, but they will be renamed in the future.)
682
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000683- rfc822 has been removed in favor of the email package.
684
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000685- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000686
Barry Warsawf5019422008-06-12 02:42:00 +0000687- Patch #2849: Remove use of rfc822 module from standard library.
688
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000689- Added C optimized implementation of io.StringIO.
690
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000691- The ``pickle`` module is now automatically use an optimized C
692 implementation of Pickler and Unpickler when available. The
693 ``cPickle`` module is no longer needed.
694
Georg Brandl877b10a2008-06-01 21:25:55 +0000695- Removed the ``htmllib`` and ``sgmllib`` modules.
696
Georg Brandl61013952008-05-28 15:56:30 +0000697- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
698 been removed from ``http.cookies``.
699
Brett Cannona23810f2008-05-26 19:04:21 +0000700- The ``commands`` module has been removed. Its getoutput() and
701 getstatusoutput() functions have been moved to the ``subprocess`` module.
702
Georg Brandl3d5c4252008-05-26 18:03:26 +0000703- The ``http`` package was created; it contains the old ``httplib``
704 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
705 as ``http.cookiejar``, and the content of the three ``HTTPServer``
706 modules as ``http.server``.
707
Georg Brandl38eceaa2008-05-26 11:14:17 +0000708- The ``xmlrpc`` package was created; it contains the old
709 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
710 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000711 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000712
713- The ``dbm`` package was created, containing the old modules
714 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
715 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
716 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
717 as submodules.
718
Georg Brandl52b92cc2008-05-25 09:43:03 +0000719- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000720
Georg Brandl52b92cc2008-05-25 09:43:03 +0000721- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000722
Georg Brandl52b92cc2008-05-25 09:43:03 +0000723- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000724
Georg Brandl52b92cc2008-05-25 09:43:03 +0000725- Issue #2250: Exceptions raised during evaluation of names in
726 rlcompleter's ``Completer.complete()`` method are now caught and
727 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000728
Georg Brandl52b92cc2008-05-25 09:43:03 +0000729- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
730 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000731
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000732- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
733 large to fit in a C long. ldexp(x, n) now returns a zero (with
734 suitable sign) if n is large and negative; previously, it raised
735 OverflowError.
736
Georg Brandl52b92cc2008-05-25 09:43:03 +0000737- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000738
Georg Brandl52b92cc2008-05-25 09:43:03 +0000739- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000740
Georg Brandl52b92cc2008-05-25 09:43:03 +0000741- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000742
Georg Brandl52b92cc2008-05-25 09:43:03 +0000743- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000744
Georg Brandl52b92cc2008-05-25 09:43:03 +0000745- Fixed the ``__all__`` setting on ``collections`` to include
746 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000747
Brett Cannoncf3520c2008-05-11 22:47:58 +0000748- The sre module has been removed.
749
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000750- The Queue module has been renamed to queue.
751
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000752- The copy_reg module has been renamed to copyreg.
753
Brett Cannond8b61ee2008-05-11 03:00:26 +0000754- The mhlib module has been removed.
755
Brett Cannonbd474422008-05-10 22:42:14 +0000756- The ihooks module has been removed.
757
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000758- The fpformat module has been removed.
759
Brett Cannonf4fd9932008-05-10 21:11:46 +0000760- The dircache module has been removed.
761
Brett Cannond175b4c2008-05-10 03:19:54 +0000762- The Canvas module has been removed.
763
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000764- The Decimal module gained the magic methods __round__, __ceil__,
765 __floor__ and __trunc__, to give support for round, math.ceil,
766 math.floor and math.trunc.
767
Brett Cannon900ee3a2008-05-08 20:31:11 +0000768- The user module has been removed.
769
Brett Cannon34afe872008-05-08 20:31:44 +0000770- The mutex module has been removed.
771
Brett Cannon0d71ee72008-05-08 18:13:40 +0000772- The imputil module has been removed.
773
Georg Brandl52b92cc2008-05-25 09:43:03 +0000774- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000775
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000776- pdb gained the "until" command.
777
Georg Brandl52b92cc2008-05-25 09:43:03 +0000778- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000779
Georg Brandl32de7af2008-08-18 23:07:41 +0000780- The threading module API was renamed to be PEP 8 compliant. The
781 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000782
Georg Brandl294d5a92008-06-01 19:25:32 +0000783Tools/Demos
784-----------
785
786- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000787
Brett Cannon0d71ee72008-05-08 18:13:40 +0000788Build
789-----
790
791
Barry Warsaw66079cd2008-04-04 01:36:36 +0000792What's New in Python 3.0a5?
793===========================
794
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000795*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000796
797Core and Builtins
798-----------------
799
Georg Brandl52b92cc2008-05-25 09:43:03 +0000800- Fixed misbehaviour of PyLong_FromSsize_t on systems where
801 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000802
Georg Brandl52b92cc2008-05-25 09:43:03 +0000803- Issue #2221: Corrected a SystemError "error return without exception
804 set", when the code executed by exec() raises an exception, and
805 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000806
Georg Brandl52b92cc2008-05-25 09:43:03 +0000807- Bug #2565: The repr() of type objects now calls them 'class', not
808 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000809
Martin v. Löwis790465f2008-04-05 20:41:37 +0000810- The command line processing was converted to pass Unicode strings
811 through as unmodified as possible; as a consequence, the C API
812 related to command line arguments was changed to use wchar_t.
813
Georg Brandl52b92cc2008-05-25 09:43:03 +0000814- All backslashes in raw strings are interpreted literally. This
815 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000816
Barry Warsaw66079cd2008-04-04 01:36:36 +0000817Extension Modules
818-----------------
819
820Library
821-------
822
Georg Brandl52b92cc2008-05-25 09:43:03 +0000823- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000824
Thomas Hellere106dc32008-04-24 18:39:36 +0000825- Issue #2682: ctypes callback functions now longer contain a cyclic
826 reference to themselves.
827
Georg Brandl52b92cc2008-05-25 09:43:03 +0000828- Issue #2058: Remove the buf attribute and add __slots__ to the
829 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000830
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000831- Bug #2606: Avoid calling .sort() on a dict_keys object.
832
Thomas Hellerbff533b2008-04-04 19:53:14 +0000833- The bundled libffi copy is now in sync with the recently released
834 libffi3.0.5 version, apart from some small changes to
835 Modules/_ctypes/libffi/configure.ac.
836
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000837Build
838-----
839
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000840- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
841
Guido van Rossumdc21db32008-04-07 18:37:41 +0000842- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000843 accidentally overwriting a Python 2.x installation. Use "make
844 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000845
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000846- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
847 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000848
Georg Brandl52b92cc2008-05-25 09:43:03 +0000849
Barry Warsawa9d499d2008-03-01 18:38:07 +0000850What's New in Python 3.0a4?
851===========================
852
Barry Warsawbb5cd082008-04-02 23:33:27 +0000853*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000854
Martin v. Löwis25931462008-03-17 20:43:42 +0000855Core and Builtins
856-----------------
857
858- Bug #2301: Don't try decoding the source code into the original
859 encoding for syntax errors.
860
Martin v. Löwis92fab752008-03-08 10:40:41 +0000861Extension Modules
862-----------------
863
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000864- The dl module was removed, use the ctypes module instead.
865
Martin v. Löwis92fab752008-03-08 10:40:41 +0000866- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000867
Martin v. Löwis071ef772008-03-08 11:24:24 +0000868Library
869-------
870
Georg Brandl52b92cc2008-05-25 09:43:03 +0000871- The class distutils.commands.build_py.build_py_2to3 can be used as a
872 build_py replacement to automatically run 2to3 on modules that are
873 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000874
Guido van Rossumf4169812008-03-17 22:56:06 +0000875- A new pickle protocol (protocol 3) is added with explicit support
876 for bytes. This is the default protocol. It intentionally cannot
877 be unpickled by Python 2.x.
878
879- When a pickle written by Python 2.x contains an (8-bit) str
880 instance, this is now decoded to a (Unicode) str instance. The
881 encoding used to do this defaults to ASCII, but can be overridden
882 via two new keyword arguments to the Unpickler class. Previously
883 this would create bytes instances, which is usually wrong: str
884 instances are often used to pickle attribute names etc., and text is
885 more common than binary data anyway.
886
Martin v. Löwis071ef772008-03-08 11:24:24 +0000887- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000888 system doesn't support CODESET and LANG isn't set or doesn't allow
889 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000890
Georg Brandl52b92cc2008-05-25 09:43:03 +0000891- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
892 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000893
Georg Brandl52b92cc2008-05-25 09:43:03 +0000894- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
895 has been renamed tokenize and now works with bytes rather than
896 strings. A new detect_encoding function has been added for
897 determining source file encoding according to PEP-0263. Token
898 sequences returned by tokenize always start with an ENCODING token
899 which specifies the encoding used to decode the file. This token is
900 used to encode the output of untokenize back to bytes.
901
Barry Warsawa9d499d2008-03-01 18:38:07 +0000902
Christian Heimesbc873412007-12-08 22:11:32 +0000903What's New in Python 3.0a3?
904===========================
905
Barry Warsaw659fc422008-03-01 17:45:23 +0000906*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000907
908Core and Builtins
909-----------------
910
Georg Brandl52b92cc2008-05-25 09:43:03 +0000911- Issue #2282: io.TextIOWrapper was not overriding seekable() from
912 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000913
Georg Brandl52b92cc2008-05-25 09:43:03 +0000914- Issue #2115: Important speedup in setting __slot__ attributes. Also
915 prevent a possible crash: an Abstract Base Class would try to access
916 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000917
Georg Brandl52b92cc2008-05-25 09:43:03 +0000918- Fixed repr() and str() of complex numbers with infinity or nan as
919 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000920
Georg Brandl52b92cc2008-05-25 09:43:03 +0000921- Clear all free list during a gc.collect() of the highest generation
922 in order to allow pymalloc to free more arenas. Python may give back
923 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000924
Georg Brandl52b92cc2008-05-25 09:43:03 +0000925- Issue #2045: Fix an infinite recursion triggered when printing a
926 subclass of collections.defaultdict, if its default_factory is set
927 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000928
929- Fixed a minor memory leak in dictobject.c. The content of the free
930 list was not freed on interpreter shutdown.
931
Georg Brandl52b92cc2008-05-25 09:43:03 +0000932- Limit free list of method and builtin function objects to 256
933 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000934
Georg Brandl52b92cc2008-05-25 09:43:03 +0000935- Patch #1953: Added ``sys._compact_freelists()`` and the C API
936 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000937 to compact the internal free lists of pre-allocted ints and floats.
938
939- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000940 Python expected the return type int but the fork familie returns
941 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000942
Georg Brandl52b92cc2008-05-25 09:43:03 +0000943- Issue #1678380: Fix a bug that identifies 0j and -0j when they
944 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000945
Georg Brandl52b92cc2008-05-25 09:43:03 +0000946- Issue #2025: Added tuple.count() and tuple.index() methods to comply
947 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000948
Georg Brandl52b92cc2008-05-25 09:43:03 +0000949- Fixed multiple reinitialization of the Python interpreter. The small
950 int list in longobject.c has caused a seg fault during the third
951 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000952
Georg Brandl52b92cc2008-05-25 09:43:03 +0000953- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000954
Georg Brandl52b92cc2008-05-25 09:43:03 +0000955- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000956
Georg Brandl52b92cc2008-05-25 09:43:03 +0000957- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000958
Georg Brandl52b92cc2008-05-25 09:43:03 +0000959- map() no longer accepts None for the first argument. Use zip()
960 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000961
Facundo Batista2336bdd2008-01-19 19:12:01 +0000962- Issue #1769: Now int("- 1") is not allowed any more.
963
Georg Brandl52b92cc2008-05-25 09:43:03 +0000964- Object/longobject.c: long(float('nan')) raises an OverflowError
965 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000966
Georg Brandl52b92cc2008-05-25 09:43:03 +0000967- Issue #1762972: __file__ points to the source file instead of the
968 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000969
Guido van Rossumab078dd2008-01-06 00:09:11 +0000970- Issue #1393: object_richcompare() returns NotImplemented instead of
971 False if the objects aren't equal, to give the other side a chance.
972
Guido van Rossume239b002008-01-06 00:44:20 +0000973- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000974
Georg Brandl52b92cc2008-05-25 09:43:03 +0000975- Improve some exception messages when Windows fails to load an
976 extension module. Now we get for example '%1 is not a valid Win32
977 application' instead of 'error code 193'. Also use Unicode strings
978 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000979
Georg Brandl52b92cc2008-05-25 09:43:03 +0000980- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
981 Python C API has gained a new type *PyInstanceMethod_Type* and the
982 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
983 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000984
Georg Brandl52b92cc2008-05-25 09:43:03 +0000985- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
986 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
987 are now enough to print the corresponding list of objects considered
988 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000989
Georg Brandl52b92cc2008-05-25 09:43:03 +0000990- Issue #1573: Improper use of the keyword-only syntax makes the
991 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000992
Georg Brandl52b92cc2008-05-25 09:43:03 +0000993- Issue #1564: The set implementation should special-case PyUnicode
994 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000995
Guido van Rossumea6775b2008-02-21 20:16:31 +0000996- Patch #1031213: Decode source line in SyntaxErrors back to its
997 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000998
Christian Heimes09aaa882008-02-23 15:01:06 +0000999- inspect.getsource() includes the decorators again.
1000
Guido van Rossumea6775b2008-02-21 20:16:31 +00001001- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
1002 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +00001003
Georg Brandl52b92cc2008-05-25 09:43:03 +00001004- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
1005 the first chunk fed to the decoder started with a BOM, but was
1006 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +00001007
Christian Heimesbc873412007-12-08 22:11:32 +00001008Extension Modules
1009-----------------
1010
Georg Brandl52b92cc2008-05-25 09:43:03 +00001011- Code for itertools ifilter(), imap(), and izip() moved to bultins
1012 and renamed to filter(), map(), and zip(). Also, renamed
1013 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +00001014
Georg Brandl52b92cc2008-05-25 09:43:03 +00001015- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +00001016
Georg Brandl52b92cc2008-05-25 09:43:03 +00001017- Bug #2111: mmap segfaults when trying to write a block opened with
1018 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +00001019
Georg Brandl52b92cc2008-05-25 09:43:03 +00001020- Issue #2063: correct order of utime and stime in os.times() result
1021 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +00001022
Christian Heimesbc873412007-12-08 22:11:32 +00001023Library
1024-------
1025
Raymond Hettinger48b8b662008-02-05 01:53:00 +00001026- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +00001027
Georg Brandl52b92cc2008-05-25 09:43:03 +00001028- Created new UserDict class in collections module. This one inherits
1029 from and complies with the MutableMapping ABC. Also, moved
1030 UserString and UserList to the collections module. The
1031 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +00001032
Guido van Rossumea6775b2008-02-21 20:16:31 +00001033- Removed UserDict.DictMixin. Replaced all its uses with
1034 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +00001035
Guido van Rossume239b002008-01-06 00:44:20 +00001036- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +00001037
Guido van Rossume239b002008-01-06 00:44:20 +00001038- Issue #1585: IDLE uses non-existent xrange() function.
1039
1040- Issue #1578: Problems in win_getpass.
1041
Georg Brandl52d168a2008-01-07 18:10:24 +00001042Build
1043-----
1044
Georg Brandl52b92cc2008-05-25 09:43:03 +00001045- Renamed --enable-unicode configure flag to --with-wide-unicode,
1046 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +00001047
Guido van Rossume239b002008-01-06 00:44:20 +00001048C API
1049-----
1050
1051- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
1052 Py_TYPE and Py_REFCNT.
1053
Georg Brandl52b92cc2008-05-25 09:43:03 +00001054- New API PyImport_ImportModuleNoBlock(), works like
1055 PyImport_ImportModule() but won't block on the import lock
1056 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +00001057
Christian Heimesbc873412007-12-08 22:11:32 +00001058
Fred Drake0e474a82007-10-11 18:01:43 +00001059What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +00001060===========================
Fred Drake0e474a82007-10-11 18:01:43 +00001061
Guido van Rossum99533a92007-12-06 05:07:41 +00001062*Release date: 07-Dec-2007*
1063
1064(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +00001065
Guido van Rossum40d20bc2007-10-22 00:09:51 +00001066Core and Builtins
1067-----------------
1068
Brett Cannon37f7e6e2007-10-26 05:42:09 +00001069- str8 now has the same construction signature as bytes.
1070
Georg Brandl52b92cc2008-05-25 09:43:03 +00001071- Comparisons between str and str8 now return False/True for ==/!=.
1072 sqlite3 returns str8 when recreating on object from it's __conform__
1073 value. The struct module returns str8 for all string-related
1074 formats. This was true before this change, but becomes more
1075 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +00001076
Georg Brandl52b92cc2008-05-25 09:43:03 +00001077- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
1078 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +00001079
1080- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
1081
1082- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +00001083 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +00001084 `PyUnicode_DecodeFSDefault(char*)` was added.
1085
Georg Brandl52b92cc2008-05-25 09:43:03 +00001086- io.open() and _fileio.FileIO have grown a new argument closefd. A
1087 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +00001088
Georg Brandl52b92cc2008-05-25 09:43:03 +00001089- Added a new option -b to issues warnings (-bb for errors) about
1090 certain operations between bytes/buffer and str like str(b'') and
1091 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +00001092
Georg Brandl52b92cc2008-05-25 09:43:03 +00001093- The standards streams sys.stdin, stdout and stderr may be None when
1094 the when the C runtime library returns an invalid file descriptor
1095 for the streams (fileno(stdin) < 0). For now this happens only for
1096 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +00001097
Christian Heimesbce52be2007-11-17 19:08:41 +00001098- Added PCbuild9 directory for VS 2008.
1099
Georg Brandl52b92cc2008-05-25 09:43:03 +00001100- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
1101 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +00001102
Georg Brandl52b92cc2008-05-25 09:43:03 +00001103- Unbound methods are gone for good. ClassObject.method returns an
1104 ordinary function object, instance.method still returns a bound
1105 method object. The API of bound methods is cleaned up, too. The
1106 im_class attribute is removed and im_func + im_self are renamed to
1107 __func__ and __self__. The factory PyMethod_New takes only func and
1108 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +00001109
Georg Brandl52b92cc2008-05-25 09:43:03 +00001110- intobject.h is no longer included by Python.h. The remains were
1111 moved to longobject.h. It still exists to define several aliases
1112 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +00001113
Christian Heimesa37d4c62007-12-04 23:02:19 +00001114- Removed sys.maxint, use sys.maxsize instead.
1115
Fred Drake0e474a82007-10-11 18:01:43 +00001116Extension Modules
1117-----------------
1118
1119- The `hotshot` profiler has been removed; use `cProfile` instead.
1120
Brett Cannone9fd2312007-10-12 19:18:19 +00001121Library
1122-------
1123
Georg Brandl52b92cc2008-05-25 09:43:03 +00001124- When loading an external file using testfile(), the passed-in
1125 encoding argument was being ignored if __loader__ is defined and
1126 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +00001127
Georg Brandl52b92cc2008-05-25 09:43:03 +00001128- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
1129 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +00001130
Christian Heimesc9543e42007-11-28 08:28:28 +00001131- Removed the 'new' module.
1132
Georg Brandl52b92cc2008-05-25 09:43:03 +00001133- Removed all types from the 'types' module that are easily accessable
1134 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +00001135
Georg Brandl52d168a2008-01-07 18:10:24 +00001136
Guido van Rossum4405cf32007-08-30 17:16:55 +00001137What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +00001138==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +00001139
Guido van Rossum4405cf32007-08-30 17:16:55 +00001140*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +00001141
1142Core and Builtins
1143-----------------
1144
Martin v. Löwis47383402007-08-15 07:32:56 +00001145- PEP 3131: Support non-ASCII identifiers.
1146
Martin v. Löwis447d33e2007-07-29 18:10:01 +00001147- PEP 3120: Change default encoding to UTF-8.
1148
Martin v. Löwis9f2e3462007-07-21 17:22:18 +00001149- PEP 3123: Use proper C inheritance for PyObject.
1150
Guido van Rossumcd16bf62007-06-13 18:07:49 +00001151- Removed the __oct__ and __hex__ special methods and added a bin()
1152 builtin function.
1153
Georg Brandl52b92cc2008-05-25 09:43:03 +00001154- PEP 3127: octal literals now start with "0o". Old-style octal
1155 literals are invalid. There are binary literals with a prefix of
1156 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +00001157
Guido van Rossume7ba4952007-06-06 23:52:48 +00001158- None, True, False are now keywords.
1159
Guido van Rossum29478ef2007-05-29 00:39:44 +00001160- PEP 3119: isinstance() and issubclass() can be overridden.
1161
Guido van Rossumebe3e162007-05-17 18:20:34 +00001162- Remove BaseException.message.
1163
Guido van Rossum1bc535d2007-05-15 18:46:22 +00001164- Remove tuple parameter unpacking (PEP 3113).
1165
Georg Brandl52b92cc2008-05-25 09:43:03 +00001166- Remove the f_restricted attribute from frames. This naturally leads
1167 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +00001168
Georg Brandl52b92cc2008-05-25 09:43:03 +00001169- PEP 3132 was accepted. That means that you can do ``a, *b =
1170 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +00001171
Georg Brandl52b92cc2008-05-25 09:43:03 +00001172- range() now returns an iterator rather than a list. Floats are not
1173 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +00001174
Nick Coghlan650f0d02007-04-15 12:05:43 +00001175- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +00001176 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +00001177
Guido van Rossume27dc722007-03-27 22:37:34 +00001178- By default, != returns the opposite of ==, unless the latter returns
1179 NotImplemented.
1180
Georg Brandl52b92cc2008-05-25 09:43:03 +00001181- Patch #1680961: sys.exitfunc has been removed and replaced with a
1182 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +00001183
Georg Brandl801dd732007-03-18 20:18:31 +00001184- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +00001185 keyword arg in the class statement, which can now use the full
1186 syntax of a parameter list. Also, the metaclass can implement a
1187 __prepare__ function which will be called to create the dictionary
1188 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +00001189
Georg Brandl428f0642007-03-18 18:35:15 +00001190- The long-deprecated argument "pend" of PyFloat_FromString() has been
1191 removed.
1192
Georg Brandle32b4222007-03-10 22:13:27 +00001193- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +00001194 its argument, if it exists. If not, it will work like before. This
1195 allows customizing the output of dir() in the presence of a
1196 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +00001197
Neal Norwitz8dfc4a92007-08-11 06:39:53 +00001198- Removed support for __members__ and __methods__.
1199
Georg Brandle32b4222007-03-10 22:13:27 +00001200- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +00001201
Georg Brandle32b4222007-03-10 22:13:27 +00001202- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +00001203 functionality formerly known as raw_input(); the name raw_input() is
1204 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +00001205
Georg Brandl52b92cc2008-05-25 09:43:03 +00001206- Classes listed in an 'except' clause must inherit from
1207 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +00001208
Guido van Rossumcc2b0162007-02-11 06:12:03 +00001209- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +00001210 and .keys(), .items(), .values() return dict views, which behave
1211 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +00001212
Guido van Rossum8b545362007-02-09 23:52:14 +00001213- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +00001214 'softspace' attribute of files is now gone (since print() doesn't
1215 use it). A side effect of this change is that you can get
1216 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +00001217
1218 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +00001219 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +00001220
1221 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +00001222
Brett Cannon398db8b2007-01-29 23:44:37 +00001223- PEP 3102: keyword-only arguments.
1224
Georg Brandl52b92cc2008-05-25 09:43:03 +00001225- Int/Long unification is complete. The 'long' built-in type and
1226 literals with trailing 'L' or 'l' have been removed. Performance
1227 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +00001228
1229- 'except E, V' must now be spelled as 'except E as V' and deletes V
1230 at the end of the except clause; V must be a simple name.
1231
Neal Norwitzc1505362006-12-28 06:47:50 +00001232- Added function annotations per PEP 3107.
1233
Georg Brandl52b92cc2008-05-25 09:43:03 +00001234- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +00001235
1236 >>> def f(x):
1237 ... def inc():
1238 ... nonlocal x
1239 ... x += 1
1240 ... return x
1241 ... return inc
1242 ...
1243 >>> inc = f(0)
1244 >>> inc()
1245 1
1246 >>> inc()
1247 2
1248
Georg Brandl66a796e2006-12-19 20:50:34 +00001249- Moved intern() to sys.intern().
1250
1251- exec is now a function.
1252
1253- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +00001254
Neal Norwitz4886cc32006-08-21 17:06:07 +00001255- Classic classes are a thing of the past. All classes are new style.
1256
1257- Exceptions *must* derive from BaseException.
1258
1259- Integer division always returns a float. The -Q option is no more.
1260 All the following are gone:
1261 * PyNumber_Divide and PyNumber_InPlaceDivide
1262 * __div__, __rdiv__, and __idiv__
1263 * nb_divide, nb_inplace_divide
1264 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
1265 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
1266 if we want to re-use __div__ and friends. If we do, it will make
1267 it harder to write code for both 2.x and 3.x.)
1268
1269- 'as' and 'with' are keywords.
1270
1271- Absolute import is the default behavior for 'import foo' etc.
1272
Georg Brandl52b92cc2008-05-25 09:43:03 +00001273- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001274
Georg Brandl52b92cc2008-05-25 09:43:03 +00001275- Removed these Python builtins: apply(), callable(), coerce(),
1276 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +00001277
Georg Brandl52b92cc2008-05-25 09:43:03 +00001278- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001279
Georg Brandl52b92cc2008-05-25 09:43:03 +00001280- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001281
1282- Remove C API support for restricted execution.
1283
Guido van Rossumcf1be882007-08-30 22:07:17 +00001284- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +00001285 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +00001286 sequences of unequal length -- it now stops after the shortest one
1287 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001288
Georg Brandl52b92cc2008-05-25 09:43:03 +00001289- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001290
1291- Added class decorators per PEP 3129.
1292
1293
1294Extension Modules
1295-----------------
1296
Georg Brandl52b92cc2008-05-25 09:43:03 +00001297- Removed the imageop module. Obsolete long with its unit tests
1298 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001299
Georg Brandl52b92cc2008-05-25 09:43:03 +00001300- Removed these attributes from the operator module: div, idiv,
1301 __div__, __idiv__, isCallable, sequenceIncludes.
1302
1303- Removed these attributes from the sys module: exc_clear(), exc_type,
1304 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001305
1306
1307Library
1308-------
1309
Georg Brandl52b92cc2008-05-25 09:43:03 +00001310- Removed the compiler package. Use of the _ast module and (an
1311 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001312
Georg Brandl52b92cc2008-05-25 09:43:03 +00001313- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
1314 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
1315 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001316
Georg Brandl52b92cc2008-05-25 09:43:03 +00001317- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001318
Georg Brandl52b92cc2008-05-25 09:43:03 +00001319- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1320 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1321 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001322
Georg Brandl52b92cc2008-05-25 09:43:03 +00001323- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001324
Georg Brandl52b92cc2008-05-25 09:43:03 +00001325- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001326 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001327
Georg Brandl52b92cc2008-05-25 09:43:03 +00001328- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001329
Georg Brandl52b92cc2008-05-25 09:43:03 +00001330- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001331
1332- Patch #1680961: atexit has been reimplemented in C.
1333
Walter Dörwald41980ca2007-08-16 21:55:45 +00001334- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1335
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001336Build
1337-----
1338
1339C API
1340-----
1341
Georg Brandl52b92cc2008-05-25 09:43:03 +00001342- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001343
Georg Brandl52b92cc2008-05-25 09:43:03 +00001344- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1345 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001346
Georg Brandl52b92cc2008-05-25 09:43:03 +00001347- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001348
Georg Brandl52b92cc2008-05-25 09:43:03 +00001349- Removed these macros: staticforward, statichere, PyArg_GetInt,
1350 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001351
Georg Brandl52b92cc2008-05-25 09:43:03 +00001352- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1353 intintobjargproc, getreadbufferproc, getwritebufferproc,
1354 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001355
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001356Tests
1357-----
1358
Brett Cannone7a30f72008-03-03 03:36:27 +00001359- Removed test.testall as test.regrtest replaces it.
1360
Brett Cannonced04e02005-02-13 22:53:22 +00001361Documentation
1362-------------
1363
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001364Mac
1365---
1366
Georg Brandl52b92cc2008-05-25 09:43:03 +00001367- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001368
Guido van Rossum845702c2007-08-30 18:44:53 +00001369Platforms
1370---------
1371
1372- Support for BeOS and AtheOS was removed (according to PEP 11).
1373
1374- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1375
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001376Tools/Demos
1377-----------
1378
Georg Brandl52b92cc2008-05-25 09:43:03 +00001379
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001380**(For information about older versions, consult the HISTORY file.)**