blob: 8c80bc28563937c9f9f1a56bdc500191a9994b15 [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'Arc47c2b602008-11-28 23:28:42 +000027- Issue #4455: IDLE failed to display the windows list when two windows have
28 the same title.
29
Christian Heimes94e07722008-11-28 11:05:17 +000030- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
31 exception.
32
Thomas Heller60e5f5e2008-11-26 18:40:58 +000033- Issue #4433: Fixed an access violation when garbage collecting
34 _ctypes.COMError instances.
35
Thomas Heller71fb5132008-11-26 08:45:36 +000036- Issue #4429: Fixed UnicodeDecodeError in ctypes.
37
Christian Heimes3e7e0692008-11-25 21:21:32 +000038- Issue #4373: Corrected a potential reference leak in the pickle module and
39 silenced a false positive ref leak in distutils.tests.test_build_ext.
Amaury Forgeot d'Arc5f952572008-11-25 21:11:54 +000040
Brett Cannon2b5d6eb2008-11-24 21:09:58 +000041- Issue #4382: dbm.dumb did not specify the expected file encoding for opened
42 files.
43
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +000044- Issue #4383: When IDLE cannot make the connection to its subprocess, it would
45 fail to properly display the error message.
46
Brett Cannon7317c1e2008-11-25 19:19:17 +000047Docs
48----
49
Christian Heimes7ca7cb42008-11-28 11:24:16 +000050- Issue #4449: Fixed multiprocessing examples
51
Brett Cannon7317c1e2008-11-25 19:19:17 +000052- Issue #3799: Document that dbm.gnu and dbm.ndbm will accept string arguments
53 for keys and values which will be converted to bytes before committal.
54
Barry Warsawd8ccd1c2008-11-21 15:13:37 +000055
56What's New in Python 3.0 release candidate 3?
57=============================================
Barry Warsawa7c37302008-11-07 03:46:33 +000058
Barry Warsaw43baef42008-11-21 01:18:21 +000059*Release date: 20-Nov-2008*
Barry Warsawa7c37302008-11-07 03:46:33 +000060
Benjamin Peterson6570d072008-11-07 03:51:42 +000061
Barry Warsawa7c37302008-11-07 03:46:33 +000062Core and Builtins
63-----------------
64
Benjamin Peterson4f39d222008-11-18 22:37:15 +000065- Issue #4349: sys.path included a non-existent platform directory because of a
66 faulty Makefile.
67
Martin v. Löwis276c3712008-11-17 16:22:11 +000068- Issue #3327: Don't overallocate in the modules_by_index list.
69
Raymond Hettinger7d99f092008-11-16 11:44:54 +000070- Issue #1721812: Binary set operations and copy() returned the input type
Brett Cannon58425d32008-11-21 00:17:53 +000071 instead of the appropriate base type. This was incorrect because set
Raymond Hettinger7d99f092008-11-16 11:44:54 +000072 subclasses would be created without their __init__() method being called.
73 The corrected behavior brings sets into line with lists and dicts.
74
Mark Dickinson4a1f5932008-11-12 23:23:36 +000075- Issue #4296: Fix PyObject_RichCompareBool so that "x in [x]" evaluates to
76 True, even when x doesn't compare equal to itself. This was a regression
77 from 2.6.
78
Amaury Forgeot d'Arc9a5499b2008-11-11 23:04:59 +000079- Issue #3705: Command-line arguments were not correctly decoded when the
80 terminal does not use UTF8.
81
Barry Warsawa7c37302008-11-07 03:46:33 +000082Library
83-------
84
Amaury Forgeot d'Arcb0c29162008-11-22 22:18:04 +000085- Issue #4363: The uuid.uuid1() and uuid.uuid4() functions now work even if
86 the ctypes module is not present.
87
Benjamin Peterson44309e62008-11-22 00:41:45 +000088- FileIO's mode attribute now always includes ``"b"``.
89
Brett Cannon58425d32008-11-21 00:17:53 +000090- Issue #3799: Fix dbm.dumb to accept strings as well as bytes for keys. String
91 keys are now written out in UTF-8.
92
Amaury Forgeot d'Arc836b6702008-11-20 23:53:46 +000093- Issue #4338: Fix distutils upload command.
94
Martin v. Löwis2d1ca2d2008-11-20 16:21:55 +000095- Issue #4354: Fix distutils register command.
96
Martin v. Löwis22d297b2008-11-19 09:14:30 +000097- Issue #4116: Resolve member name conflict in ScrolledCanvas.__init__.
98
Benjamin Peterson3d4ca742008-11-12 21:39:01 +000099- Issue #4307: The named tuple that ``inspect.getfullargspec()`` returns now
100 uses ``kwonlydefaults`` instead of ``kwdefaults``.
101
Amaury Forgeot d'Arc3e4e72f2008-11-11 20:05:06 +0000102- Issue #4298: Fix a segfault when pickle.loads is passed a ill-formed input.
103
104- Issue #4283: Fix a left-over "iteritems" call in distutils.
Georg Brandlda066062008-11-08 15:15:57 +0000105
Martin v. Löwisbfda5442008-11-07 18:54:51 +0000106Build
107-----
108
Martin v. Löwisa632a752008-11-19 13:55:07 +0000109- Issue #4289: Remove Cancel button from AdvancedDlg.
110
Martin v. Löwisbfda5442008-11-07 18:54:51 +0000111- Issue #1656675: Register a drop handler for .py* files on Windows.
112
Benjamin Peterson06fd5f82008-11-08 17:24:34 +0000113Tools/Demos
114-----------
115
116- Demos of the socketserver module now work with Python 3.
117
Barry Warsawa7c37302008-11-07 03:46:33 +0000118
Barry Warsaw1f0e67e2008-11-06 03:29:32 +0000119What's New in Python 3.0 release candidate 2
120============================================
Guido van Rossumf0af3e32008-10-02 18:55:37 +0000121
Barry Warsaw1f0e67e2008-11-06 03:29:32 +0000122*Release date: 05-Nov-2008*
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +0000123
124Core and Builtins
125-----------------
126
Benjamin Petersond968e272008-11-05 22:48:33 +0000127- Issue #4211: The __path__ attribute of frozen packages is now a list instead
128 of a string as required by PEP 302.
129
Benjamin Peterson93ef79c2008-11-05 22:49:09 +0000130- Issue #3727: Fixed poplib.
Christian Heimesd3956292008-11-05 19:48:27 +0000131
Christian Heimes933238a2008-11-05 19:44:21 +0000132- Issue #3714: Fixed nntplib by using bytes where appropriate.
133
Christian Heimesfb5faf02008-11-05 19:39:50 +0000134- Issue #1210: Fixed imaplib and its documentation.
135
Christian Heimesecc42a22008-11-05 19:30:32 +0000136- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
137 method on file objects with closefd=False. The file descriptor is still
138 kept open but the file object behaves like a closed file. The ``FileIO``
139 object also got a new readonly attribute ``closefd``.
140
Amaury Forgeot d'Arcdd8059f2008-10-30 23:03:32 +0000141- Issue #3626: On cygwin, starting python with a non-existent script name
142 would not display anything if the file name is only 1 character long.
143
Amaury Forgeot d'Arc424b4812008-10-30 22:25:31 +0000144- Issue #4176: Fixed a crash when pickling an object which ``__reduce__``
145 method does not return iterators for the 4th and 5th items.
146
Amaury Forgeot d'Arcdd8059f2008-10-30 23:03:32 +0000147- Issue #3723: Fixed initialization of subinterpreters.
Christian Heimes6a27efa2008-10-30 21:48:26 +0000148
Christian Heimes5833a2f2008-10-30 21:40:04 +0000149- Issue #4213: The file system encoding is now normalized by the
150 codec subsystem, for example UTF-8 is turned into utf-8.
151
Christian Heimes9c94ba42008-10-30 21:34:02 +0000152- Issue #4200: Changed the atexit module to store its state in its
153 PyModuleDef atexitmodule. This fixes a bug with multiple subinterpeters.
154
Christian Heimesfec925b2008-10-30 21:22:55 +0000155- Issue #4237: io.FileIO() was raising invalid warnings caused by
156 insufficient initialization of PyFileIOObject struct members.
157
Amaury Forgeot d'Arcf43ee812008-10-30 20:58:42 +0000158- Issue #4170: Pickling a collections.defaultdict object would crash the
159 interpreter.
160
Benjamin Peterson08a8f5f2008-10-19 14:15:00 +0000161- Issue #4146: Compilation on OpenBSD has been restored.
162
Brett Cannonda780432008-10-17 03:38:50 +0000163- Issue #3574: compile() incorrectly handled source code encoded as Latin-1.
164
Amaury Forgeot d'Arccf8016a2008-10-09 23:37:48 +0000165- Issues #2384 and #3975: Tracebacks were not correctly printed when the
166 source file contains a ``coding:`` header: the wrong line was displayed, and
167 the encoding was not respected.
168
Martin v. Löwis4e0630c2008-10-07 13:16:28 +0000169- Issue #3740: Null-initialize module state.
170
Benjamin Peterson60320cb2008-09-26 21:49:22 +0000171- Issue #3946: PyObject_CheckReadBuffer crashed on a memoryview object.
172
Amaury Forgeot d'Arcd0db98f2008-09-21 21:49:01 +0000173- Issue #1688: On Windows, the input() prompt was not correctly displayed if it
174 contains non-ascii characters.
175
Martin v. Löwis6fea2332008-09-25 04:15:27 +0000176- Bug #3951: Py_USING_MEMORY_DEBUGGER should not be enabled by default.
177
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +0000178Library
179-------
180
Amaury Forgeot d'Arc87eee632008-10-17 20:15:53 +0000181- Issue #3664: The pickle module could segfault if a subclass of Pickler fails
182 to call the base __init__ method.
183
184- Issue #3725: telnetlib now works completely in bytes.
Benjamin Peterson3de7fb82008-10-15 20:54:24 +0000185
Martin v. Löwis33b64502008-10-15 05:58:17 +0000186- Issue #4072: Restore build_py_2to3.
187
Martin v. Löwisd8506df2008-10-06 15:19:21 +0000188- Issue #4014: Don't claim that Python has an Alpha release status, in addition
189 to claiming it is Mature.
190
Martin v. Löwis04dc25c2008-10-03 16:09:28 +0000191- Issue #3187: Add sys.setfilesystemencoding.
192
Guido van Rossumf0af3e32008-10-02 18:55:37 +0000193- Issue #3187: Better support for "undecodable" filenames. Code by Victor
194 Stinner, with small tweaks by GvR.
195
Martin v. Löwis601149b2008-09-29 22:19:08 +0000196- Issue #3965: Allow repeated calls to turtle.Screen, by making it a
197 true singleton object.
198
Benjamin Peterson3a53fbb2008-09-27 22:04:16 +0000199- Issue #3911: ftplib.FTP.makeport() could give invalid port numbers.
200
Amaury Forgeot d'Arcb5cf3012008-09-25 22:27:43 +0000201- Issue #3929: When the database cannot be opened, dbm.open() would incorrectly
202 raise a TypeError: "'tuple' object is not callable" instead of the expected
203 dbm.error.
204
Martin v. Löwis60ebb8b2008-09-21 07:32:10 +0000205- Bug #3884: Make the turtle module toplevel again.
206
Thomas Heller1308c262008-09-24 19:01:29 +0000207- Issue #3547: Fixed ctypes structures bitfields of varying integer
208 sizes.
209
Gerhard Häring6117f422008-09-22 06:04:51 +0000210Extension Modules
211-----------------
212
213- Issue #3659: Subclasses of str didn't work as SQL parameters.
214
Martin v. Löwisf63921f2008-10-13 11:30:30 +0000215Build
216-----
217
Martin v. Löwis900646e2008-11-06 17:30:03 +0000218- Issue #4120: Exclude manifest from extension modules in VS2008.
219
Martin v. Löwisc820eaf2008-10-17 13:47:20 +0000220- Issue #4091: Install pythonxy.dll in system32 again.
221
Martin v. Löwisf63921f2008-10-13 11:30:30 +0000222- Issue #4018: Disable "for me" installations on Vista.
223
Martin v. Löwisb37509b2008-11-04 20:45:29 +0000224- Issue #4204: Fixed module build errors on FreeBSD 4.
225
Martin v. Löwis33b64502008-10-15 05:58:17 +0000226Tools/Demos
227-----------
228
Martin v. Löwis869bad92008-10-17 15:54:44 +0000229- Issue #3717: Fix Demo/embed/demo.c.
230
Martin v. Löwis33b64502008-10-15 05:58:17 +0000231- Issue #4072: Add a distutils demo for build_py_2to3.
232
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +0000233
Barry Warsaw8509df72008-08-21 03:02:47 +0000234What's New in Python 3.0 release candidate 1
235============================================
236
Barry Warsawb8854802008-09-18 03:00:28 +0000237*Release date: 17-Sep-2008*
Barry Warsaw8509df72008-08-21 03:02:47 +0000238
239Core and Builtins
240-----------------
241
Benjamin Peterson5e19e442008-09-10 21:47:03 +0000242- Issue #3827: memoryview lost its size attribute in favor of using len(view).
243
Hirokazu Yamamoto167b12b2008-09-09 14:01:25 +0000244- Issue #3813: could not lanch python.exe via symbolic link on cygwin.
245
Antoine Pitrou5651eaa2008-09-06 20:46:58 +0000246- Issue #3705: fix crash when given a non-ascii value on the command line for
Amaury Forgeot d'Arc8530e852008-09-09 07:28:22 +0000247 the "-c" and "-m" parameters. Now the behaviour is as expected under Linux,
248 although under Windows it fails at a later point.
Antoine Pitrou5651eaa2008-09-06 20:46:58 +0000249
Benjamin Peterson791dc2f2008-09-05 23:27:15 +0000250- Issue #3279: Importing site at interpreter was failing silently because the
251 site module uses the open builtin which was not initialized at the time.
252
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +0000253- Issue #3660: Corrected a reference leak in str.encode() when the encoder
254 does not return a bytes object.
255
256- Issue #3774: Added a few more checks in PyTokenizer_FindEncoding to handle
Amaury Forgeot d'Arc1b933ed2008-09-04 22:34:09 +0000257 error conditions.
258
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +0000259- Issue #3594: Fix Parser/tokenizer.c:fp_setreadl() to open the file being
Brett Cannon8a9583e2008-09-04 05:04:25 +0000260 tokenized by either a file path or file pointer for the benefit of
261 PyTokenizer_FindEncoding().
262
Antoine Pitroufff95302008-09-03 18:58:51 +0000263- Issue #3696: Error parsing arguments on OpenBSD <= 4.4 and Cygwin. On
264 these systems, the mbstowcs() function is slightly buggy and must be
265 replaced with strlen() for the purpose of counting of number of wide
266 characters needed to represent the multi-byte character string.
267
Antoine Pitrou658fad82008-09-03 18:34:34 +0000268- Issue #3697: "Fatal Python error: Cannot recover from stack overflow"
269 could be easily encountered under Windows in debug mode when exercising
270 the recursion limit checking code, due to bogus handling of recursion
271 limit when USE_STACKCHEK was enabled.
272
Brett Cannon54bd41d2008-09-02 04:01:42 +0000273- Issue 3639: The _warnings module could segfault the interpreter when
274 unexpected types were passed in as arguments.
275
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +0000276- Issue #3712: The memoryview object had a reference leak and didn't support
277 cyclic garbage collection.
278
Antoine Pitrouf71995782008-08-29 18:37:05 +0000279- Issue #3668: Fix a memory leak with the "s*" argument parser in
280 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
281 was correctly parsed but parsing of subsequent arguments failed.
282
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +0000283- Issue #3611: An exception __context__ could be cleared in a complex pattern
284 involving a __del__ method re-raising an exception.
285
Antoine Pitrouec569b72008-08-26 22:40:48 +0000286- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
287 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
288 mechanism. In the process, fix a bug where isinstance() and issubclass(),
289 when given a tuple of classes as second argument, were looking up
290 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
291 type object.
292
Antoine Pitroue2dffc02008-08-26 22:02:58 +0000293- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
294
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +0000295- Issue #3651: Fix various memory leaks when using the buffer
296 interface, or when the "s#" code of PyArg_ParseTuple is given a
297 bytes object.
298
Neal Norwitz6ae2eb22008-08-24 23:50:08 +0000299- Issue #3657: Fix uninitialized memory read when pickling longs.
300 Found by valgrind.
301
Neal Norwitz3ce5d922008-08-24 07:08:55 +0000302- Apply security patches from Apple.
303
Neal Norwitz2f99b242008-08-24 05:48:10 +0000304- Fix crashes on memory allocation failure found with failmalloc.
305
306- Fix memory leaks found with valgrind and update suppressions file.
307
308- Fix compiler warnings in opt mode which would lead to invalid memory reads.
309
310- Fix problem using wrong name in decimal module reported by pychecker.
311
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +0000312- Issue #3650: Fixed a reference leak in bytes.split('x').
313
Benjamin Petersonc15a0732008-08-26 16:46:47 +0000314- bytes(o) now tries to use o.__bytes__() before using fallbacks.
315
Gregory P. Smith207f2112008-09-07 06:29:10 +0000316- Issue #1204: The configure script now tests for additional libraries
317 that may be required when linking against readline. This fixes issues
318 with x86_64 builds on some platforms (a few Linux flavors and OpenBSD).
319
Benjamin Petersonc15a0732008-08-26 16:46:47 +0000320C API
321-----
322
323- PyObject_Bytes and PyBytes_FromObject were added.
324
Barry Warsaw8509df72008-08-21 03:02:47 +0000325Library
326-------
327
Guido van Rossum698280d2008-09-10 17:44:35 +0000328- Issue #3756: make re.escape() handle bytes as well as str.
329
Georg Brandl7cd67cc2008-09-09 19:31:25 +0000330- Issue #3800: fix filter() related bug in formatter.py.
331
Antoine Pitrou5fe291f2008-09-06 23:00:03 +0000332- Issue #874900: fix behaviour of threading module after a fork.
333
Antoine Pitrou9e4fdf42008-09-05 23:43:02 +0000334- Issue #3535: zipfile couldn't read some zip files larger than 2GB.
335
336- Issue #3776: Deprecate the bsddb package for removal in 3.0.
337
338- Issue #3762: platform.architecture() fails if python is lanched via
339 its symbolic link.
340
Antoine Pitroud79dc622008-09-05 00:03:33 +0000341- Issue #3660: fix a memory leak in the C accelerator of the pickle module.
342
Antoine Pitrou1d6a16b2008-09-04 21:32:09 +0000343- Issue #3160: the "bdist_wininst" distutils command didn't work.
344
Guilherme Polob212b752008-09-04 11:21:31 +0000345- Issue #1658: tkinter changes dict size during iteration in both
346 tkinter.BaseWidget and tkinter.scrolledtext.ScrolledText.
347
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000348- The bsddb module (and therefore the dbm.bsd module) has been removed.
Gregory P. Smith451e99b2008-09-04 04:46:48 +0000349 It is now maintained outside of the standard library at
350 http://www.jcea.es/programacion/pybsddb.htm.
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000351
Facundo Batistac469d4c2008-09-03 22:49:01 +0000352- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
353 to the urlparse one. Added a DeprecationWarning in the old module, it
354 will be deprecated in the future.
355
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +0000356- Issue #3719: platform.architecture() fails if there are spaces in the
357 path to the Python binary.
358
Brett Cannonec92e182008-09-02 02:46:59 +0000359- Issue 3602: As part of the merge of r66135, make the parameters on
360 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
361
Benjamin Petersonb3085c92008-09-01 23:09:31 +0000362- The deprecation warnings for the camelCase threading API names were removed.
363
Jesse Noller338f5782008-09-03 18:22:19 +0000364- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
365 SEM_VALUE_MAX.
366
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000367Extension Modules
368-----------------
369
Antoine Pitrou9cadb1b2008-09-15 23:02:56 +0000370- Issue #3782: os.write() must not accept unicode strings.
371
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +0000372- Issue #2975: When compiling several extension modules with Visual Studio 2008
373 from the same python interpreter, some environment variables would grow
374 without limit.
375
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000376- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
377 exploitation of poor argument checking.
378
Jesus Cea6ba33292008-08-31 14:12:11 +0000379- bsddb code updated to version 4.7.3pre2. This code is the same than
380 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
381 The Python code is automatically translated using "2to3". Please, do not
382 update this code in Python 3.0 by hand. Update the 2.6 one and then
383 do "2to3".
384
Benjamin Peterson791dc2f2008-09-05 23:27:15 +0000385- The _bytesio and _stringio modules are now compiled into the python binary.
386
Gregory P. Smith693fc462008-09-06 20:13:06 +0000387- Issue #3492 and #3790: Fixed the zlib module and zipimport module uses of
388 mutable bytearray objects where they should have been using immutable bytes.
389
Gregory P. Smith0a608fd2008-09-06 21:34:51 +0000390- Issue #3797: Fixed the dbm, marshal, mmap, ossaudiodev, & winreg modules to
391 return bytes objects instead of bytearray objects.
392
Gregory P. Smith693fc462008-09-06 20:13:06 +0000393
Neal Norwitz8f2f22a2008-08-24 20:59:23 +0000394Tools/Demos
395-----------
396
397- Fix Misc/gdbinit so it works.
398
Barry Warsaw8509df72008-08-21 03:02:47 +0000399
Amaury Forgeot d'Arcf7bfcfb2008-09-09 06:42:00 +0000400Build
401-----
402
Hirokazu Yamamoto54a1cc62008-09-09 17:55:11 +0000403- Issue #3812: Failed to build python if configure --without-threads.
404
Amaury Forgeot d'Arcf7bfcfb2008-09-09 06:42:00 +0000405- Issue #3791: Remove the bsddb module from the Windows installer, and the
406 core bsddb library from the Windows build files.
407
408
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000409What's new in Python 3.0b3?
410===========================
411
Barry Warsaw57c10582008-08-21 02:39:51 +0000412*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000413
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000414Core and Builtins
415-----------------
416
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000417- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
418 arguments.
419
Antoine Pitrou616d2852008-08-19 22:09:34 +0000420- Issue #2394: implement more of the memoryview API, with the caveat that
421 only one-dimensional contiguous buffers are supported and exercised right
422 now. Slicing, slice assignment and comparison (equality and inequality)
423 have been added. Also, the tolist() method has been implemented, but only
424 for byte buffers. Endly, the API has been updated to return bytes objects
425 wherever it used to return bytearrays.
426
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000427- Issue #3560: clean up the new C PyMemoryView API so that naming is
428 internally consistent; add macros PyMemoryView_GET_BASE() and
429 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
430 without relying on a particular implementation; remove the ill-named
431 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
432
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000433- ctypes function pointers that are COM methods have a boolean True
434 value again.
435
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000436- Issue #1819: function calls with several named parameters are now on
437 average 35% faster (as measured by pybench).
438
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000439- The undocumented C APIs PyUnicode_AsString() and
440 PyUnicode_AsStringAndSize() were made private to the interpreter, in
441 order to be able to refine their interfaces for Python 3.1.
442
443 If you need to access the UTF-8 representation of a Unicode object
444 as bytes string, please use PyUnicode_AsUTF8String() instead.
445
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000446- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
447 to Python 3.0's stricter semantics which allow to avoid successive
448 reallocations of the result string (this also affects str.join()).
449
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000450
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000451Library
452-------
453
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000454- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
455 a build problem on MacOS with CJK locales. It adds four temporary
456 mappings to existing legacy codecs that are virtually compatible
457 with Mac encodings. They will be replaced by codecs correctly
458 implemented in 3.1.
459
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000460- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
461 "global name 'header' is not defined".
462
Antoine Pitroufd036452008-08-19 17:56:33 +0000463- Issue #2834: update the regular expression library to match the unicode
464 standards of py3k. In other words, mixing bytes and unicode strings
465 (be it as pattern, search string or replacement string) raises a TypeError.
466 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
467 and can be disabled by specifying a new re.ASCII flag; as for bytes
468 patterns, ASCII matching is the only option and trying to specify re.UNICODE
469 for such patterns raises a ValueError.
470
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000471- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
472 Code contributed by Matt Giuca. quote() now encodes the input
473 before quoting, unquote() decodes after unquoting. There are
474 new arguments to change the encoding and errors settings.
475 There are also new APIs to skip the encode/decode steps.
476 [un]quote_plus() are also affected.
477
Nick Coghlan36f49522008-08-18 12:31:52 +0000478- Issue #2235: numbers.Number now blocks inheritance of the default id()
479 based hash because that hash mechanism is not correct for numeric types.
480 All concrete numeric types that inherit from Number (rather than just
481 registering with it) must explicitly provide a hash implementation in
482 order for their instances to be hashable.
483
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000484- Issue #2676: in the email package, content-type parsing was hanging on
485 pathological input because of quadratic or exponential behaviour of a
486 regular expression.
487
Antoine Pitrou87695762008-08-14 22:44:29 +0000488- Issue #3476: binary buffered reading through the new "io" library is now
489 thread-safe.
490
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000491- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
492 menu entries were not deleted.
493
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000494- Remove the TarFileCompat class from tarfile.py.
495
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000496- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
497 accepts the same parameters. It just checks that its first argument is an
498 integer.
499
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000500- Issue #3394: zipfile.writestr sets external attributes when passed a
501 file name rather than a ZipInfo instance, so files are extracted with
502 mode 0600 rather than 000 under Unix.
503
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000504- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
505 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000506
Martin v. Löwis371bb502008-08-16 13:02:57 +0000507Extension Modules
508-----------------
509
510- Bug #3542: Support Unicode strings in _msi module.
511
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000512What's new in Python 3.0b2?
513===========================
514
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000515*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000516
517Core and Builtins
518-----------------
519
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000520- Issue #3008: the float type has a new instance method 'float.hex'
521 and a new class method 'float.fromhex' to convert floating-point
522 numbers to and from hexadecimal strings, respectively.
523
Eric Smithd68af8f2008-07-16 00:15:35 +0000524- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
525 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
526
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000527- Issue #3280: like chr(), the "%c" format now accepts unicode code points
528 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
529 "narrow Unicode" builds, the result is a string of 2 code units, forming a
530 UTF-16 surrogate pair.
531
Georg Brandld52429f2008-07-04 15:55:02 +0000532- Issue #3282: str.isprintable() should return False for undefined
533 Unicode characters.
534
Martin v. Löwis029656f2008-06-30 04:06:08 +0000535- Issue #3236: Return small longs from PyLong_FromString.
536
Benjamin Petersone6528212008-07-15 15:32:09 +0000537- Exception tracebacks now support exception chaining.
538
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000539Library
540-------
541
Brett Cannonc2542e92008-07-25 18:19:20 +0000542- Removed the sunaudio module. Use sunau instead.
543
Thomas Heller47bc8092008-08-19 06:38:12 +0000544- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
545 api functions without holding the GIL, which could lead to a fatal
546 error when they failed.
547
548- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
549
Georg Brandl30704ea02008-07-23 15:07:12 +0000550- Removed "ast" function aliases from the parser module.
551
Thomas Heller15383a02008-07-15 19:46:52 +0000552- Issue #3313: Fixed a crash when a failed dlopen() call does not set
553 a valid dlerror() message.
554
Thomas Heller0261e1e2008-07-15 17:25:07 +0000555- Issue #3258: Fixed a crash when a ctypes POINTER type to an
556 incomplete structure was created.
557
Georg Brandl1abcbf82008-07-01 19:28:43 +0000558- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
559 argument now must be a bytes object in any case.
560
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000561- Issue #3145: help("modules whatever") failed when trying to load the source
562 code of every single module of the standard library, including invalid files
563 used in the test suite.
564
Georg Brandlbded4d32008-07-17 18:15:35 +0000565- The gettext library now consistently uses Unicode strings for message ids
566 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000567
Benjamin Petersone6528212008-07-15 15:32:09 +0000568- The traceback module has been expanded to handle chained exceptions.
569
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000570C API
571-----
572
573- Issue #3247: the function Py_FindMethod was removed. Modern types should
574 use the tp_methods slot instead.
575
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000576Tools/Demos
577-----------
578
Georg Brandl336341f2008-07-01 20:21:28 +0000579- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000580
Georg Brandl336341f2008-07-01 20:21:28 +0000581- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000582
583
Brett Cannon0d71ee72008-05-08 18:13:40 +0000584What's new in Python 3.0b1?
585===========================
586
Barry Warsawc1e689e2008-06-19 00:35:43 +0000587*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000588
589Core and Builtins
590-----------------
591
Brett Cannondb734912008-06-27 00:52:15 +0000592- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
593 argument being anything other than a dict or None. Also fixed a bug in error
594 handling when 'message' and 'category' were both set to None, triggering a
595 bus error.
596
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000597- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
598 holds the last (strong) reference to its referent.
599
Georg Brandl559e5d72008-06-11 18:37:52 +0000600- Issue #2630: implement PEP 3138. repr() now returns printable
601 Unicode characters unescaped, to get an ASCII-only representation
602 of an object use ascii().
603
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000604- Issue #1342: On windows, Python could not start when installed in a
605 directory with non-ascii characters.
606
Martin v. Löwis1a214512008-06-11 05:26:20 +0000607- Implement PEP 3121: new module initialization and finalization API.
608
Georg Brandle1b5ac62008-06-04 13:06:58 +0000609- Removed the already-defunct ``-t`` option.
610
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000611- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
612 unmarshalling many code objects, which happens when importing a
613 large .pyc file (~1000 functions).
614
Georg Brandl52b92cc2008-05-25 09:43:03 +0000615- Issue #2963: fix merging oversight that disabled method cache for
616 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000617
Georg Brandlc9b09532008-05-25 09:24:38 +0000618- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
619
Georg Brandl52b92cc2008-05-25 09:43:03 +0000620- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000621
Georg Brandl52b92cc2008-05-25 09:43:03 +0000622- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
623 code now allows any unicode string and returns a utf-8 encoded
624 buffer, just like the "s#" code already does. The "z" code was
625 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000626
Georg Brandl52b92cc2008-05-25 09:43:03 +0000627- Issue #2863: generators now have a ``gen.__name__`` attribute that
628 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
629 ``func.func_code.co_name``. The repr() of a generator now also
630 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000631
632- Issue #2831: enumerate() now has a ``start`` argument.
633
Georg Brandl52b92cc2008-05-25 09:43:03 +0000634- Issue #2801: fix bug in the float.is_integer method where a
635 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000636
Georg Brandl52b92cc2008-05-25 09:43:03 +0000637- The ``--with-toolbox-glue`` option (and the associated
638 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000639
Georg Brandl52b92cc2008-05-25 09:43:03 +0000640- Issue #2196: hasattr() now lets exceptions which do not inherit
641 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
642 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000643
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000644- #3021 Exception reraising sematics have been significantly improved. However,
645 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
646 code anymore.
647
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000648- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
649 removed.
650
Brett Cannon0d71ee72008-05-08 18:13:40 +0000651Extension Modules
652-----------------
653
Georg Brandl38feaf02008-05-25 07:45:51 +0000654- Renamed ``_winreg`` module to ``winreg``.
655
Georg Brandl52b92cc2008-05-25 09:43:03 +0000656- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
657 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000658
659- Support for Windows 9x has been removed from the winsound module.
660
Georg Brandl52b92cc2008-05-25 09:43:03 +0000661- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000662
Brett Cannon0d71ee72008-05-08 18:13:40 +0000663Library
664-------
665
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000666- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
667 symtable.Symbol have been removed.
668
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000669- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
670
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000671- a new ``urllib`` package was created. It consists of code from
672 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
673 modules have all been removed. The new package has five submodules:
674 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
675 ``urllib.error``, and ``urllib.robotparser``. The
676 ``urllib.request.urlopen()`` function uses the url opener from
677 ``urllib2``. (Note that the unittests have not been renamed for the
678 beta, but they will be renamed in the future.)
679
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000680- rfc822 has been removed in favor of the email package.
681
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000682- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000683
Barry Warsawf5019422008-06-12 02:42:00 +0000684- Patch #2849: Remove use of rfc822 module from standard library.
685
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000686- Added C optimized implementation of io.StringIO.
687
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000688- The ``pickle`` module is now automatically use an optimized C
689 implementation of Pickler and Unpickler when available. The
690 ``cPickle`` module is no longer needed.
691
Georg Brandl877b10a2008-06-01 21:25:55 +0000692- Removed the ``htmllib`` and ``sgmllib`` modules.
693
Georg Brandl61013952008-05-28 15:56:30 +0000694- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
695 been removed from ``http.cookies``.
696
Brett Cannona23810f2008-05-26 19:04:21 +0000697- The ``commands`` module has been removed. Its getoutput() and
698 getstatusoutput() functions have been moved to the ``subprocess`` module.
699
Georg Brandl3d5c4252008-05-26 18:03:26 +0000700- The ``http`` package was created; it contains the old ``httplib``
701 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
702 as ``http.cookiejar``, and the content of the three ``HTTPServer``
703 modules as ``http.server``.
704
Georg Brandl38eceaa2008-05-26 11:14:17 +0000705- The ``xmlrpc`` package was created; it contains the old
706 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
707 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000708 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000709
710- The ``dbm`` package was created, containing the old modules
711 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
712 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
713 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
714 as submodules.
715
Georg Brandl52b92cc2008-05-25 09:43:03 +0000716- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000717
Georg Brandl52b92cc2008-05-25 09:43:03 +0000718- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000719
Georg Brandl52b92cc2008-05-25 09:43:03 +0000720- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000721
Georg Brandl52b92cc2008-05-25 09:43:03 +0000722- Issue #2250: Exceptions raised during evaluation of names in
723 rlcompleter's ``Completer.complete()`` method are now caught and
724 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000725
Georg Brandl52b92cc2008-05-25 09:43:03 +0000726- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
727 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000728
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000729- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
730 large to fit in a C long. ldexp(x, n) now returns a zero (with
731 suitable sign) if n is large and negative; previously, it raised
732 OverflowError.
733
Georg Brandl52b92cc2008-05-25 09:43:03 +0000734- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000735
Georg Brandl52b92cc2008-05-25 09:43:03 +0000736- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000737
Georg Brandl52b92cc2008-05-25 09:43:03 +0000738- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000739
Georg Brandl52b92cc2008-05-25 09:43:03 +0000740- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000741
Georg Brandl52b92cc2008-05-25 09:43:03 +0000742- Fixed the ``__all__`` setting on ``collections`` to include
743 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000744
Brett Cannoncf3520c2008-05-11 22:47:58 +0000745- The sre module has been removed.
746
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000747- The Queue module has been renamed to queue.
748
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000749- The copy_reg module has been renamed to copyreg.
750
Brett Cannond8b61ee2008-05-11 03:00:26 +0000751- The mhlib module has been removed.
752
Brett Cannonbd474422008-05-10 22:42:14 +0000753- The ihooks module has been removed.
754
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000755- The fpformat module has been removed.
756
Brett Cannonf4fd9932008-05-10 21:11:46 +0000757- The dircache module has been removed.
758
Brett Cannond175b4c2008-05-10 03:19:54 +0000759- The Canvas module has been removed.
760
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000761- The Decimal module gained the magic methods __round__, __ceil__,
762 __floor__ and __trunc__, to give support for round, math.ceil,
763 math.floor and math.trunc.
764
Brett Cannon900ee3a2008-05-08 20:31:11 +0000765- The user module has been removed.
766
Brett Cannon34afe872008-05-08 20:31:44 +0000767- The mutex module has been removed.
768
Brett Cannon0d71ee72008-05-08 18:13:40 +0000769- The imputil module has been removed.
770
Georg Brandl52b92cc2008-05-25 09:43:03 +0000771- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000772
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000773- pdb gained the "until" command.
774
Georg Brandl52b92cc2008-05-25 09:43:03 +0000775- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000776
Georg Brandl32de7af2008-08-18 23:07:41 +0000777- The threading module API was renamed to be PEP 8 compliant. The
778 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000779
Georg Brandl294d5a92008-06-01 19:25:32 +0000780Tools/Demos
781-----------
782
783- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000784
Brett Cannon0d71ee72008-05-08 18:13:40 +0000785Build
786-----
787
788
Barry Warsaw66079cd2008-04-04 01:36:36 +0000789What's New in Python 3.0a5?
790===========================
791
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000792*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000793
794Core and Builtins
795-----------------
796
Georg Brandl52b92cc2008-05-25 09:43:03 +0000797- Fixed misbehaviour of PyLong_FromSsize_t on systems where
798 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000799
Georg Brandl52b92cc2008-05-25 09:43:03 +0000800- Issue #2221: Corrected a SystemError "error return without exception
801 set", when the code executed by exec() raises an exception, and
802 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000803
Georg Brandl52b92cc2008-05-25 09:43:03 +0000804- Bug #2565: The repr() of type objects now calls them 'class', not
805 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000806
Martin v. Löwis790465f2008-04-05 20:41:37 +0000807- The command line processing was converted to pass Unicode strings
808 through as unmodified as possible; as a consequence, the C API
809 related to command line arguments was changed to use wchar_t.
810
Georg Brandl52b92cc2008-05-25 09:43:03 +0000811- All backslashes in raw strings are interpreted literally. This
812 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000813
Barry Warsaw66079cd2008-04-04 01:36:36 +0000814Extension Modules
815-----------------
816
817Library
818-------
819
Georg Brandl52b92cc2008-05-25 09:43:03 +0000820- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000821
Thomas Hellere106dc32008-04-24 18:39:36 +0000822- Issue #2682: ctypes callback functions now longer contain a cyclic
823 reference to themselves.
824
Georg Brandl52b92cc2008-05-25 09:43:03 +0000825- Issue #2058: Remove the buf attribute and add __slots__ to the
826 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000827
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000828- Bug #2606: Avoid calling .sort() on a dict_keys object.
829
Thomas Hellerbff533b2008-04-04 19:53:14 +0000830- The bundled libffi copy is now in sync with the recently released
831 libffi3.0.5 version, apart from some small changes to
832 Modules/_ctypes/libffi/configure.ac.
833
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000834Build
835-----
836
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000837- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
838
Guido van Rossumdc21db32008-04-07 18:37:41 +0000839- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000840 accidentally overwriting a Python 2.x installation. Use "make
841 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000842
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000843- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
844 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000845
Georg Brandl52b92cc2008-05-25 09:43:03 +0000846
Barry Warsawa9d499d2008-03-01 18:38:07 +0000847What's New in Python 3.0a4?
848===========================
849
Barry Warsawbb5cd082008-04-02 23:33:27 +0000850*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000851
Martin v. Löwis25931462008-03-17 20:43:42 +0000852Core and Builtins
853-----------------
854
855- Bug #2301: Don't try decoding the source code into the original
856 encoding for syntax errors.
857
Martin v. Löwis92fab752008-03-08 10:40:41 +0000858Extension Modules
859-----------------
860
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000861- The dl module was removed, use the ctypes module instead.
862
Martin v. Löwis92fab752008-03-08 10:40:41 +0000863- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000864
Martin v. Löwis071ef772008-03-08 11:24:24 +0000865Library
866-------
867
Georg Brandl52b92cc2008-05-25 09:43:03 +0000868- The class distutils.commands.build_py.build_py_2to3 can be used as a
869 build_py replacement to automatically run 2to3 on modules that are
870 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000871
Guido van Rossumf4169812008-03-17 22:56:06 +0000872- A new pickle protocol (protocol 3) is added with explicit support
873 for bytes. This is the default protocol. It intentionally cannot
874 be unpickled by Python 2.x.
875
876- When a pickle written by Python 2.x contains an (8-bit) str
877 instance, this is now decoded to a (Unicode) str instance. The
878 encoding used to do this defaults to ASCII, but can be overridden
879 via two new keyword arguments to the Unpickler class. Previously
880 this would create bytes instances, which is usually wrong: str
881 instances are often used to pickle attribute names etc., and text is
882 more common than binary data anyway.
883
Martin v. Löwis071ef772008-03-08 11:24:24 +0000884- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000885 system doesn't support CODESET and LANG isn't set or doesn't allow
886 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000887
Georg Brandl52b92cc2008-05-25 09:43:03 +0000888- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
889 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000890
Georg Brandl52b92cc2008-05-25 09:43:03 +0000891- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
892 has been renamed tokenize and now works with bytes rather than
893 strings. A new detect_encoding function has been added for
894 determining source file encoding according to PEP-0263. Token
895 sequences returned by tokenize always start with an ENCODING token
896 which specifies the encoding used to decode the file. This token is
897 used to encode the output of untokenize back to bytes.
898
Barry Warsawa9d499d2008-03-01 18:38:07 +0000899
Christian Heimesbc873412007-12-08 22:11:32 +0000900What's New in Python 3.0a3?
901===========================
902
Barry Warsaw659fc422008-03-01 17:45:23 +0000903*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000904
905Core and Builtins
906-----------------
907
Georg Brandl52b92cc2008-05-25 09:43:03 +0000908- Issue #2282: io.TextIOWrapper was not overriding seekable() from
909 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000910
Georg Brandl52b92cc2008-05-25 09:43:03 +0000911- Issue #2115: Important speedup in setting __slot__ attributes. Also
912 prevent a possible crash: an Abstract Base Class would try to access
913 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000914
Georg Brandl52b92cc2008-05-25 09:43:03 +0000915- Fixed repr() and str() of complex numbers with infinity or nan as
916 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000917
Georg Brandl52b92cc2008-05-25 09:43:03 +0000918- Clear all free list during a gc.collect() of the highest generation
919 in order to allow pymalloc to free more arenas. Python may give back
920 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000921
Georg Brandl52b92cc2008-05-25 09:43:03 +0000922- Issue #2045: Fix an infinite recursion triggered when printing a
923 subclass of collections.defaultdict, if its default_factory is set
924 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000925
926- Fixed a minor memory leak in dictobject.c. The content of the free
927 list was not freed on interpreter shutdown.
928
Georg Brandl52b92cc2008-05-25 09:43:03 +0000929- Limit free list of method and builtin function objects to 256
930 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000931
Georg Brandl52b92cc2008-05-25 09:43:03 +0000932- Patch #1953: Added ``sys._compact_freelists()`` and the C API
933 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000934 to compact the internal free lists of pre-allocted ints and floats.
935
936- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000937 Python expected the return type int but the fork familie returns
938 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000939
Georg Brandl52b92cc2008-05-25 09:43:03 +0000940- Issue #1678380: Fix a bug that identifies 0j and -0j when they
941 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000942
Georg Brandl52b92cc2008-05-25 09:43:03 +0000943- Issue #2025: Added tuple.count() and tuple.index() methods to comply
944 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000945
Georg Brandl52b92cc2008-05-25 09:43:03 +0000946- Fixed multiple reinitialization of the Python interpreter. The small
947 int list in longobject.c has caused a seg fault during the third
948 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000949
Georg Brandl52b92cc2008-05-25 09:43:03 +0000950- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000951
Georg Brandl52b92cc2008-05-25 09:43:03 +0000952- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000953
Georg Brandl52b92cc2008-05-25 09:43:03 +0000954- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000955
Georg Brandl52b92cc2008-05-25 09:43:03 +0000956- map() no longer accepts None for the first argument. Use zip()
957 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000958
Facundo Batista2336bdd2008-01-19 19:12:01 +0000959- Issue #1769: Now int("- 1") is not allowed any more.
960
Georg Brandl52b92cc2008-05-25 09:43:03 +0000961- Object/longobject.c: long(float('nan')) raises an OverflowError
962 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000963
Georg Brandl52b92cc2008-05-25 09:43:03 +0000964- Issue #1762972: __file__ points to the source file instead of the
965 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000966
Guido van Rossumab078dd2008-01-06 00:09:11 +0000967- Issue #1393: object_richcompare() returns NotImplemented instead of
968 False if the objects aren't equal, to give the other side a chance.
969
Guido van Rossume239b002008-01-06 00:44:20 +0000970- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000971
Georg Brandl52b92cc2008-05-25 09:43:03 +0000972- Improve some exception messages when Windows fails to load an
973 extension module. Now we get for example '%1 is not a valid Win32
974 application' instead of 'error code 193'. Also use Unicode strings
975 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000976
Georg Brandl52b92cc2008-05-25 09:43:03 +0000977- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
978 Python C API has gained a new type *PyInstanceMethod_Type* and the
979 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
980 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000981
Georg Brandl52b92cc2008-05-25 09:43:03 +0000982- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
983 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
984 are now enough to print the corresponding list of objects considered
985 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000986
Georg Brandl52b92cc2008-05-25 09:43:03 +0000987- Issue #1573: Improper use of the keyword-only syntax makes the
988 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000989
Georg Brandl52b92cc2008-05-25 09:43:03 +0000990- Issue #1564: The set implementation should special-case PyUnicode
991 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000992
Guido van Rossumea6775b2008-02-21 20:16:31 +0000993- Patch #1031213: Decode source line in SyntaxErrors back to its
994 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000995
Christian Heimes09aaa882008-02-23 15:01:06 +0000996- inspect.getsource() includes the decorators again.
997
Guido van Rossumea6775b2008-02-21 20:16:31 +0000998- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
999 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +00001000
Georg Brandl52b92cc2008-05-25 09:43:03 +00001001- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
1002 the first chunk fed to the decoder started with a BOM, but was
1003 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +00001004
Christian Heimesbc873412007-12-08 22:11:32 +00001005Extension Modules
1006-----------------
1007
Georg Brandl52b92cc2008-05-25 09:43:03 +00001008- Code for itertools ifilter(), imap(), and izip() moved to bultins
1009 and renamed to filter(), map(), and zip(). Also, renamed
1010 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +00001011
Georg Brandl52b92cc2008-05-25 09:43:03 +00001012- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +00001013
Georg Brandl52b92cc2008-05-25 09:43:03 +00001014- Bug #2111: mmap segfaults when trying to write a block opened with
1015 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +00001016
Georg Brandl52b92cc2008-05-25 09:43:03 +00001017- Issue #2063: correct order of utime and stime in os.times() result
1018 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +00001019
Christian Heimesbc873412007-12-08 22:11:32 +00001020Library
1021-------
1022
Raymond Hettinger48b8b662008-02-05 01:53:00 +00001023- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +00001024
Georg Brandl52b92cc2008-05-25 09:43:03 +00001025- Created new UserDict class in collections module. This one inherits
1026 from and complies with the MutableMapping ABC. Also, moved
1027 UserString and UserList to the collections module. The
1028 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +00001029
Guido van Rossumea6775b2008-02-21 20:16:31 +00001030- Removed UserDict.DictMixin. Replaced all its uses with
1031 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +00001032
Guido van Rossume239b002008-01-06 00:44:20 +00001033- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +00001034
Guido van Rossume239b002008-01-06 00:44:20 +00001035- Issue #1585: IDLE uses non-existent xrange() function.
1036
1037- Issue #1578: Problems in win_getpass.
1038
Georg Brandl52d168a2008-01-07 18:10:24 +00001039Build
1040-----
1041
Georg Brandl52b92cc2008-05-25 09:43:03 +00001042- Renamed --enable-unicode configure flag to --with-wide-unicode,
1043 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +00001044
Guido van Rossume239b002008-01-06 00:44:20 +00001045C API
1046-----
1047
1048- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
1049 Py_TYPE and Py_REFCNT.
1050
Georg Brandl52b92cc2008-05-25 09:43:03 +00001051- New API PyImport_ImportModuleNoBlock(), works like
1052 PyImport_ImportModule() but won't block on the import lock
1053 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +00001054
Christian Heimesbc873412007-12-08 22:11:32 +00001055
Fred Drake0e474a82007-10-11 18:01:43 +00001056What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +00001057===========================
Fred Drake0e474a82007-10-11 18:01:43 +00001058
Guido van Rossum99533a92007-12-06 05:07:41 +00001059*Release date: 07-Dec-2007*
1060
1061(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +00001062
Guido van Rossum40d20bc2007-10-22 00:09:51 +00001063Core and Builtins
1064-----------------
1065
Brett Cannon37f7e6e2007-10-26 05:42:09 +00001066- str8 now has the same construction signature as bytes.
1067
Georg Brandl52b92cc2008-05-25 09:43:03 +00001068- Comparisons between str and str8 now return False/True for ==/!=.
1069 sqlite3 returns str8 when recreating on object from it's __conform__
1070 value. The struct module returns str8 for all string-related
1071 formats. This was true before this change, but becomes more
1072 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +00001073
Georg Brandl52b92cc2008-05-25 09:43:03 +00001074- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
1075 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +00001076
1077- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
1078
1079- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +00001080 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +00001081 `PyUnicode_DecodeFSDefault(char*)` was added.
1082
Georg Brandl52b92cc2008-05-25 09:43:03 +00001083- io.open() and _fileio.FileIO have grown a new argument closefd. A
1084 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +00001085
Georg Brandl52b92cc2008-05-25 09:43:03 +00001086- Added a new option -b to issues warnings (-bb for errors) about
1087 certain operations between bytes/buffer and str like str(b'') and
1088 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +00001089
Georg Brandl52b92cc2008-05-25 09:43:03 +00001090- The standards streams sys.stdin, stdout and stderr may be None when
1091 the when the C runtime library returns an invalid file descriptor
1092 for the streams (fileno(stdin) < 0). For now this happens only for
1093 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +00001094
Christian Heimesbce52be2007-11-17 19:08:41 +00001095- Added PCbuild9 directory for VS 2008.
1096
Georg Brandl52b92cc2008-05-25 09:43:03 +00001097- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
1098 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +00001099
Georg Brandl52b92cc2008-05-25 09:43:03 +00001100- Unbound methods are gone for good. ClassObject.method returns an
1101 ordinary function object, instance.method still returns a bound
1102 method object. The API of bound methods is cleaned up, too. The
1103 im_class attribute is removed and im_func + im_self are renamed to
1104 __func__ and __self__. The factory PyMethod_New takes only func and
1105 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +00001106
Georg Brandl52b92cc2008-05-25 09:43:03 +00001107- intobject.h is no longer included by Python.h. The remains were
1108 moved to longobject.h. It still exists to define several aliases
1109 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +00001110
Christian Heimesa37d4c62007-12-04 23:02:19 +00001111- Removed sys.maxint, use sys.maxsize instead.
1112
Fred Drake0e474a82007-10-11 18:01:43 +00001113Extension Modules
1114-----------------
1115
1116- The `hotshot` profiler has been removed; use `cProfile` instead.
1117
Brett Cannone9fd2312007-10-12 19:18:19 +00001118Library
1119-------
1120
Georg Brandl52b92cc2008-05-25 09:43:03 +00001121- When loading an external file using testfile(), the passed-in
1122 encoding argument was being ignored if __loader__ is defined and
1123 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +00001124
Georg Brandl52b92cc2008-05-25 09:43:03 +00001125- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
1126 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +00001127
Christian Heimesc9543e42007-11-28 08:28:28 +00001128- Removed the 'new' module.
1129
Georg Brandl52b92cc2008-05-25 09:43:03 +00001130- Removed all types from the 'types' module that are easily accessable
1131 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +00001132
Georg Brandl52d168a2008-01-07 18:10:24 +00001133
Guido van Rossum4405cf32007-08-30 17:16:55 +00001134What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +00001135==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +00001136
Guido van Rossum4405cf32007-08-30 17:16:55 +00001137*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +00001138
1139Core and Builtins
1140-----------------
1141
Martin v. Löwis47383402007-08-15 07:32:56 +00001142- PEP 3131: Support non-ASCII identifiers.
1143
Martin v. Löwis447d33e2007-07-29 18:10:01 +00001144- PEP 3120: Change default encoding to UTF-8.
1145
Martin v. Löwis9f2e3462007-07-21 17:22:18 +00001146- PEP 3123: Use proper C inheritance for PyObject.
1147
Guido van Rossumcd16bf62007-06-13 18:07:49 +00001148- Removed the __oct__ and __hex__ special methods and added a bin()
1149 builtin function.
1150
Georg Brandl52b92cc2008-05-25 09:43:03 +00001151- PEP 3127: octal literals now start with "0o". Old-style octal
1152 literals are invalid. There are binary literals with a prefix of
1153 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +00001154
Guido van Rossume7ba4952007-06-06 23:52:48 +00001155- None, True, False are now keywords.
1156
Guido van Rossum29478ef2007-05-29 00:39:44 +00001157- PEP 3119: isinstance() and issubclass() can be overridden.
1158
Guido van Rossumebe3e162007-05-17 18:20:34 +00001159- Remove BaseException.message.
1160
Guido van Rossum1bc535d2007-05-15 18:46:22 +00001161- Remove tuple parameter unpacking (PEP 3113).
1162
Georg Brandl52b92cc2008-05-25 09:43:03 +00001163- Remove the f_restricted attribute from frames. This naturally leads
1164 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +00001165
Georg Brandl52b92cc2008-05-25 09:43:03 +00001166- PEP 3132 was accepted. That means that you can do ``a, *b =
1167 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +00001168
Georg Brandl52b92cc2008-05-25 09:43:03 +00001169- range() now returns an iterator rather than a list. Floats are not
1170 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +00001171
Nick Coghlan650f0d02007-04-15 12:05:43 +00001172- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +00001173 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +00001174
Guido van Rossume27dc722007-03-27 22:37:34 +00001175- By default, != returns the opposite of ==, unless the latter returns
1176 NotImplemented.
1177
Georg Brandl52b92cc2008-05-25 09:43:03 +00001178- Patch #1680961: sys.exitfunc has been removed and replaced with a
1179 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +00001180
Georg Brandl801dd732007-03-18 20:18:31 +00001181- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +00001182 keyword arg in the class statement, which can now use the full
1183 syntax of a parameter list. Also, the metaclass can implement a
1184 __prepare__ function which will be called to create the dictionary
1185 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +00001186
Georg Brandl428f0642007-03-18 18:35:15 +00001187- The long-deprecated argument "pend" of PyFloat_FromString() has been
1188 removed.
1189
Georg Brandle32b4222007-03-10 22:13:27 +00001190- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +00001191 its argument, if it exists. If not, it will work like before. This
1192 allows customizing the output of dir() in the presence of a
1193 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +00001194
Neal Norwitz8dfc4a92007-08-11 06:39:53 +00001195- Removed support for __members__ and __methods__.
1196
Georg Brandle32b4222007-03-10 22:13:27 +00001197- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +00001198
Georg Brandle32b4222007-03-10 22:13:27 +00001199- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +00001200 functionality formerly known as raw_input(); the name raw_input() is
1201 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +00001202
Georg Brandl52b92cc2008-05-25 09:43:03 +00001203- Classes listed in an 'except' clause must inherit from
1204 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +00001205
Guido van Rossumcc2b0162007-02-11 06:12:03 +00001206- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +00001207 and .keys(), .items(), .values() return dict views, which behave
1208 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +00001209
Guido van Rossum8b545362007-02-09 23:52:14 +00001210- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +00001211 'softspace' attribute of files is now gone (since print() doesn't
1212 use it). A side effect of this change is that you can get
1213 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +00001214
1215 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +00001216 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +00001217
1218 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +00001219
Brett Cannon398db8b2007-01-29 23:44:37 +00001220- PEP 3102: keyword-only arguments.
1221
Georg Brandl52b92cc2008-05-25 09:43:03 +00001222- Int/Long unification is complete. The 'long' built-in type and
1223 literals with trailing 'L' or 'l' have been removed. Performance
1224 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +00001225
1226- 'except E, V' must now be spelled as 'except E as V' and deletes V
1227 at the end of the except clause; V must be a simple name.
1228
Neal Norwitzc1505362006-12-28 06:47:50 +00001229- Added function annotations per PEP 3107.
1230
Georg Brandl52b92cc2008-05-25 09:43:03 +00001231- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +00001232
1233 >>> def f(x):
1234 ... def inc():
1235 ... nonlocal x
1236 ... x += 1
1237 ... return x
1238 ... return inc
1239 ...
1240 >>> inc = f(0)
1241 >>> inc()
1242 1
1243 >>> inc()
1244 2
1245
Georg Brandl66a796e2006-12-19 20:50:34 +00001246- Moved intern() to sys.intern().
1247
1248- exec is now a function.
1249
1250- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +00001251
Neal Norwitz4886cc32006-08-21 17:06:07 +00001252- Classic classes are a thing of the past. All classes are new style.
1253
1254- Exceptions *must* derive from BaseException.
1255
1256- Integer division always returns a float. The -Q option is no more.
1257 All the following are gone:
1258 * PyNumber_Divide and PyNumber_InPlaceDivide
1259 * __div__, __rdiv__, and __idiv__
1260 * nb_divide, nb_inplace_divide
1261 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
1262 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
1263 if we want to re-use __div__ and friends. If we do, it will make
1264 it harder to write code for both 2.x and 3.x.)
1265
1266- 'as' and 'with' are keywords.
1267
1268- Absolute import is the default behavior for 'import foo' etc.
1269
Georg Brandl52b92cc2008-05-25 09:43:03 +00001270- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001271
Georg Brandl52b92cc2008-05-25 09:43:03 +00001272- Removed these Python builtins: apply(), callable(), coerce(),
1273 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +00001274
Georg Brandl52b92cc2008-05-25 09:43:03 +00001275- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001276
Georg Brandl52b92cc2008-05-25 09:43:03 +00001277- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001278
1279- Remove C API support for restricted execution.
1280
Guido van Rossumcf1be882007-08-30 22:07:17 +00001281- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +00001282 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +00001283 sequences of unequal length -- it now stops after the shortest one
1284 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001285
Georg Brandl52b92cc2008-05-25 09:43:03 +00001286- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001287
1288- Added class decorators per PEP 3129.
1289
1290
1291Extension Modules
1292-----------------
1293
Georg Brandl52b92cc2008-05-25 09:43:03 +00001294- Removed the imageop module. Obsolete long with its unit tests
1295 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001296
Georg Brandl52b92cc2008-05-25 09:43:03 +00001297- Removed these attributes from the operator module: div, idiv,
1298 __div__, __idiv__, isCallable, sequenceIncludes.
1299
1300- Removed these attributes from the sys module: exc_clear(), exc_type,
1301 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001302
1303
1304Library
1305-------
1306
Georg Brandl52b92cc2008-05-25 09:43:03 +00001307- Removed the compiler package. Use of the _ast module and (an
1308 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001309
Georg Brandl52b92cc2008-05-25 09:43:03 +00001310- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
1311 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
1312 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001313
Georg Brandl52b92cc2008-05-25 09:43:03 +00001314- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001315
Georg Brandl52b92cc2008-05-25 09:43:03 +00001316- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1317 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1318 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001319
Georg Brandl52b92cc2008-05-25 09:43:03 +00001320- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001321
Georg Brandl52b92cc2008-05-25 09:43:03 +00001322- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001323 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001324
Georg Brandl52b92cc2008-05-25 09:43:03 +00001325- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001326
Georg Brandl52b92cc2008-05-25 09:43:03 +00001327- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001328
1329- Patch #1680961: atexit has been reimplemented in C.
1330
Walter Dörwald41980ca2007-08-16 21:55:45 +00001331- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1332
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001333Build
1334-----
1335
1336C API
1337-----
1338
Georg Brandl52b92cc2008-05-25 09:43:03 +00001339- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001340
Georg Brandl52b92cc2008-05-25 09:43:03 +00001341- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1342 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001343
Georg Brandl52b92cc2008-05-25 09:43:03 +00001344- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001345
Georg Brandl52b92cc2008-05-25 09:43:03 +00001346- Removed these macros: staticforward, statichere, PyArg_GetInt,
1347 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001348
Georg Brandl52b92cc2008-05-25 09:43:03 +00001349- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1350 intintobjargproc, getreadbufferproc, getwritebufferproc,
1351 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001352
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001353Tests
1354-----
1355
Brett Cannone7a30f72008-03-03 03:36:27 +00001356- Removed test.testall as test.regrtest replaces it.
1357
Brett Cannonced04e02005-02-13 22:53:22 +00001358Documentation
1359-------------
1360
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001361Mac
1362---
1363
Georg Brandl52b92cc2008-05-25 09:43:03 +00001364- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001365
Guido van Rossum845702c2007-08-30 18:44:53 +00001366Platforms
1367---------
1368
1369- Support for BeOS and AtheOS was removed (according to PEP 11).
1370
1371- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1372
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001373Tools/Demos
1374-----------
1375
Georg Brandl52b92cc2008-05-25 09:43:03 +00001376
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001377**(For information about older versions, consult the HISTORY file.)**