blob: 45e965bc6d191fa4a55f0de6634a4953e7eb852a [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
Benjamin Peterson6570d072008-11-07 03:51:42 +00007What's New in Python 3.0 release candiate 3?
8============================================
Barry Warsawa7c37302008-11-07 03:46:33 +00009
10*Release date: XX-XXX-2008*
11
Benjamin Peterson6570d072008-11-07 03:51:42 +000012
Barry Warsawa7c37302008-11-07 03:46:33 +000013Core and Builtins
14-----------------
15
Benjamin Peterson4f39d222008-11-18 22:37:15 +000016- Issue #4349: sys.path included a non-existent platform directory because of a
17 faulty Makefile.
18
Martin v. Löwis276c3712008-11-17 16:22:11 +000019- Issue #3327: Don't overallocate in the modules_by_index list.
20
Raymond Hettinger7d99f092008-11-16 11:44:54 +000021- Issue #1721812: Binary set operations and copy() returned the input type
22 instead of the appropriate base type. This was incorrect because set
23 subclasses would be created without their __init__() method being called.
24 The corrected behavior brings sets into line with lists and dicts.
25
Mark Dickinson4a1f5932008-11-12 23:23:36 +000026- Issue #4296: Fix PyObject_RichCompareBool so that "x in [x]" evaluates to
27 True, even when x doesn't compare equal to itself. This was a regression
28 from 2.6.
29
Amaury Forgeot d'Arc9a5499b2008-11-11 23:04:59 +000030- Issue #3705: Command-line arguments were not correctly decoded when the
31 terminal does not use UTF8.
32
Barry Warsawa7c37302008-11-07 03:46:33 +000033Library
34-------
35
Benjamin Peterson3d4ca742008-11-12 21:39:01 +000036- Issue #4307: The named tuple that ``inspect.getfullargspec()`` returns now
37 uses ``kwonlydefaults`` instead of ``kwdefaults``.
38
Amaury Forgeot d'Arc3e4e72f2008-11-11 20:05:06 +000039- Issue #4298: Fix a segfault when pickle.loads is passed a ill-formed input.
40
41- Issue #4283: Fix a left-over "iteritems" call in distutils.
Georg Brandlda066062008-11-08 15:15:57 +000042
Martin v. Löwisbfda5442008-11-07 18:54:51 +000043Build
44-----
45
46- Issue #1656675: Register a drop handler for .py* files on Windows.
47
Benjamin Peterson06fd5f82008-11-08 17:24:34 +000048Tools/Demos
49-----------
50
51- Demos of the socketserver module now work with Python 3.
52
Barry Warsawa7c37302008-11-07 03:46:33 +000053
Barry Warsaw1f0e67e2008-11-06 03:29:32 +000054What's New in Python 3.0 release candidate 2
55============================================
Guido van Rossumf0af3e32008-10-02 18:55:37 +000056
Barry Warsaw1f0e67e2008-11-06 03:29:32 +000057*Release date: 05-Nov-2008*
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +000058
59Core and Builtins
60-----------------
61
Benjamin Petersond968e272008-11-05 22:48:33 +000062- Issue #4211: The __path__ attribute of frozen packages is now a list instead
63 of a string as required by PEP 302.
64
Benjamin Peterson93ef79c2008-11-05 22:49:09 +000065- Issue #3727: Fixed poplib.
Christian Heimesd3956292008-11-05 19:48:27 +000066
Christian Heimes933238a2008-11-05 19:44:21 +000067- Issue #3714: Fixed nntplib by using bytes where appropriate.
68
Christian Heimesfb5faf02008-11-05 19:39:50 +000069- Issue #1210: Fixed imaplib and its documentation.
70
Christian Heimesecc42a22008-11-05 19:30:32 +000071- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
72 method on file objects with closefd=False. The file descriptor is still
73 kept open but the file object behaves like a closed file. The ``FileIO``
74 object also got a new readonly attribute ``closefd``.
75
Amaury Forgeot d'Arcdd8059f2008-10-30 23:03:32 +000076- Issue #3626: On cygwin, starting python with a non-existent script name
77 would not display anything if the file name is only 1 character long.
78
Amaury Forgeot d'Arc424b4812008-10-30 22:25:31 +000079- Issue #4176: Fixed a crash when pickling an object which ``__reduce__``
80 method does not return iterators for the 4th and 5th items.
81
Amaury Forgeot d'Arcdd8059f2008-10-30 23:03:32 +000082- Issue #3723: Fixed initialization of subinterpreters.
Christian Heimes6a27efa2008-10-30 21:48:26 +000083
Christian Heimes5833a2f2008-10-30 21:40:04 +000084- Issue #4213: The file system encoding is now normalized by the
85 codec subsystem, for example UTF-8 is turned into utf-8.
86
Christian Heimes9c94ba42008-10-30 21:34:02 +000087- Issue #4200: Changed the atexit module to store its state in its
88 PyModuleDef atexitmodule. This fixes a bug with multiple subinterpeters.
89
Christian Heimesfec925b2008-10-30 21:22:55 +000090- Issue #4237: io.FileIO() was raising invalid warnings caused by
91 insufficient initialization of PyFileIOObject struct members.
92
Amaury Forgeot d'Arcf43ee812008-10-30 20:58:42 +000093- Issue #4170: Pickling a collections.defaultdict object would crash the
94 interpreter.
95
Benjamin Peterson08a8f5f2008-10-19 14:15:00 +000096- Issue #4146: Compilation on OpenBSD has been restored.
97
Brett Cannonda780432008-10-17 03:38:50 +000098- Issue #3574: compile() incorrectly handled source code encoded as Latin-1.
99
Amaury Forgeot d'Arccf8016a2008-10-09 23:37:48 +0000100- Issues #2384 and #3975: Tracebacks were not correctly printed when the
101 source file contains a ``coding:`` header: the wrong line was displayed, and
102 the encoding was not respected.
103
Martin v. Löwis4e0630c2008-10-07 13:16:28 +0000104- Issue #3740: Null-initialize module state.
105
Benjamin Peterson60320cb2008-09-26 21:49:22 +0000106- Issue #3946: PyObject_CheckReadBuffer crashed on a memoryview object.
107
Amaury Forgeot d'Arcd0db98f2008-09-21 21:49:01 +0000108- Issue #1688: On Windows, the input() prompt was not correctly displayed if it
109 contains non-ascii characters.
110
Martin v. Löwis6fea2332008-09-25 04:15:27 +0000111- Bug #3951: Py_USING_MEMORY_DEBUGGER should not be enabled by default.
112
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +0000113Library
114-------
115
Amaury Forgeot d'Arc87eee632008-10-17 20:15:53 +0000116- Issue #3664: The pickle module could segfault if a subclass of Pickler fails
117 to call the base __init__ method.
118
119- Issue #3725: telnetlib now works completely in bytes.
Benjamin Peterson3de7fb82008-10-15 20:54:24 +0000120
Martin v. Löwis33b64502008-10-15 05:58:17 +0000121- Issue #4072: Restore build_py_2to3.
122
Martin v. Löwisd8506df2008-10-06 15:19:21 +0000123- Issue #4014: Don't claim that Python has an Alpha release status, in addition
124 to claiming it is Mature.
125
Martin v. Löwis04dc25c2008-10-03 16:09:28 +0000126- Issue #3187: Add sys.setfilesystemencoding.
127
Guido van Rossumf0af3e32008-10-02 18:55:37 +0000128- Issue #3187: Better support for "undecodable" filenames. Code by Victor
129 Stinner, with small tweaks by GvR.
130
Martin v. Löwis601149b2008-09-29 22:19:08 +0000131- Issue #3965: Allow repeated calls to turtle.Screen, by making it a
132 true singleton object.
133
Benjamin Peterson3a53fbb2008-09-27 22:04:16 +0000134- Issue #3911: ftplib.FTP.makeport() could give invalid port numbers.
135
Amaury Forgeot d'Arcb5cf3012008-09-25 22:27:43 +0000136- Issue #3929: When the database cannot be opened, dbm.open() would incorrectly
137 raise a TypeError: "'tuple' object is not callable" instead of the expected
138 dbm.error.
139
Martin v. Löwis60ebb8b2008-09-21 07:32:10 +0000140- Bug #3884: Make the turtle module toplevel again.
141
Thomas Heller1308c262008-09-24 19:01:29 +0000142- Issue #3547: Fixed ctypes structures bitfields of varying integer
143 sizes.
144
Gerhard Häring6117f422008-09-22 06:04:51 +0000145Extension Modules
146-----------------
147
148- Issue #3659: Subclasses of str didn't work as SQL parameters.
149
Martin v. Löwisf63921f2008-10-13 11:30:30 +0000150Build
151-----
152
Martin v. Löwis900646e2008-11-06 17:30:03 +0000153- Issue #4120: Exclude manifest from extension modules in VS2008.
154
Martin v. Löwisc820eaf2008-10-17 13:47:20 +0000155- Issue #4091: Install pythonxy.dll in system32 again.
156
Martin v. Löwisf63921f2008-10-13 11:30:30 +0000157- Issue #4018: Disable "for me" installations on Vista.
158
Martin v. Löwisb37509b2008-11-04 20:45:29 +0000159- Issue #4204: Fixed module build errors on FreeBSD 4.
160
Martin v. Löwis33b64502008-10-15 05:58:17 +0000161Tools/Demos
162-----------
163
Martin v. Löwis869bad92008-10-17 15:54:44 +0000164- Issue #3717: Fix Demo/embed/demo.c.
165
Martin v. Löwis33b64502008-10-15 05:58:17 +0000166- Issue #4072: Add a distutils demo for build_py_2to3.
167
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +0000168
Barry Warsaw8509df72008-08-21 03:02:47 +0000169What's New in Python 3.0 release candidate 1
170============================================
171
Barry Warsawb8854802008-09-18 03:00:28 +0000172*Release date: 17-Sep-2008*
Barry Warsaw8509df72008-08-21 03:02:47 +0000173
174Core and Builtins
175-----------------
176
Benjamin Peterson5e19e442008-09-10 21:47:03 +0000177- Issue #3827: memoryview lost its size attribute in favor of using len(view).
178
Hirokazu Yamamoto167b12b2008-09-09 14:01:25 +0000179- Issue #3813: could not lanch python.exe via symbolic link on cygwin.
180
Antoine Pitrou5651eaa2008-09-06 20:46:58 +0000181- Issue #3705: fix crash when given a non-ascii value on the command line for
Amaury Forgeot d'Arc8530e852008-09-09 07:28:22 +0000182 the "-c" and "-m" parameters. Now the behaviour is as expected under Linux,
183 although under Windows it fails at a later point.
Antoine Pitrou5651eaa2008-09-06 20:46:58 +0000184
Benjamin Peterson791dc2f2008-09-05 23:27:15 +0000185- Issue #3279: Importing site at interpreter was failing silently because the
186 site module uses the open builtin which was not initialized at the time.
187
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +0000188- Issue #3660: Corrected a reference leak in str.encode() when the encoder
189 does not return a bytes object.
190
191- Issue #3774: Added a few more checks in PyTokenizer_FindEncoding to handle
Amaury Forgeot d'Arc1b933ed2008-09-04 22:34:09 +0000192 error conditions.
193
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +0000194- Issue #3594: Fix Parser/tokenizer.c:fp_setreadl() to open the file being
Brett Cannon8a9583e2008-09-04 05:04:25 +0000195 tokenized by either a file path or file pointer for the benefit of
196 PyTokenizer_FindEncoding().
197
Antoine Pitroufff95302008-09-03 18:58:51 +0000198- Issue #3696: Error parsing arguments on OpenBSD <= 4.4 and Cygwin. On
199 these systems, the mbstowcs() function is slightly buggy and must be
200 replaced with strlen() for the purpose of counting of number of wide
201 characters needed to represent the multi-byte character string.
202
Antoine Pitrou658fad82008-09-03 18:34:34 +0000203- Issue #3697: "Fatal Python error: Cannot recover from stack overflow"
204 could be easily encountered under Windows in debug mode when exercising
205 the recursion limit checking code, due to bogus handling of recursion
206 limit when USE_STACKCHEK was enabled.
207
Brett Cannon54bd41d2008-09-02 04:01:42 +0000208- Issue 3639: The _warnings module could segfault the interpreter when
209 unexpected types were passed in as arguments.
210
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +0000211- Issue #3712: The memoryview object had a reference leak and didn't support
212 cyclic garbage collection.
213
Antoine Pitrouf71995782008-08-29 18:37:05 +0000214- Issue #3668: Fix a memory leak with the "s*" argument parser in
215 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
216 was correctly parsed but parsing of subsequent arguments failed.
217
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +0000218- Issue #3611: An exception __context__ could be cleared in a complex pattern
219 involving a __del__ method re-raising an exception.
220
Antoine Pitrouec569b72008-08-26 22:40:48 +0000221- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
222 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
223 mechanism. In the process, fix a bug where isinstance() and issubclass(),
224 when given a tuple of classes as second argument, were looking up
225 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
226 type object.
227
Antoine Pitroue2dffc02008-08-26 22:02:58 +0000228- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
229
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +0000230- Issue #3651: Fix various memory leaks when using the buffer
231 interface, or when the "s#" code of PyArg_ParseTuple is given a
232 bytes object.
233
Neal Norwitz6ae2eb22008-08-24 23:50:08 +0000234- Issue #3657: Fix uninitialized memory read when pickling longs.
235 Found by valgrind.
236
Neal Norwitz3ce5d922008-08-24 07:08:55 +0000237- Apply security patches from Apple.
238
Neal Norwitz2f99b242008-08-24 05:48:10 +0000239- Fix crashes on memory allocation failure found with failmalloc.
240
241- Fix memory leaks found with valgrind and update suppressions file.
242
243- Fix compiler warnings in opt mode which would lead to invalid memory reads.
244
245- Fix problem using wrong name in decimal module reported by pychecker.
246
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +0000247- Issue #3650: Fixed a reference leak in bytes.split('x').
248
Benjamin Petersonc15a0732008-08-26 16:46:47 +0000249- bytes(o) now tries to use o.__bytes__() before using fallbacks.
250
Gregory P. Smith207f2112008-09-07 06:29:10 +0000251- Issue #1204: The configure script now tests for additional libraries
252 that may be required when linking against readline. This fixes issues
253 with x86_64 builds on some platforms (a few Linux flavors and OpenBSD).
254
Benjamin Petersonc15a0732008-08-26 16:46:47 +0000255C API
256-----
257
258- PyObject_Bytes and PyBytes_FromObject were added.
259
Barry Warsaw8509df72008-08-21 03:02:47 +0000260Library
261-------
262
Guido van Rossum698280d2008-09-10 17:44:35 +0000263- Issue #3756: make re.escape() handle bytes as well as str.
264
Georg Brandl7cd67cc2008-09-09 19:31:25 +0000265- Issue #3800: fix filter() related bug in formatter.py.
266
Antoine Pitrou5fe291f2008-09-06 23:00:03 +0000267- Issue #874900: fix behaviour of threading module after a fork.
268
Antoine Pitrou9e4fdf42008-09-05 23:43:02 +0000269- Issue #3535: zipfile couldn't read some zip files larger than 2GB.
270
271- Issue #3776: Deprecate the bsddb package for removal in 3.0.
272
273- Issue #3762: platform.architecture() fails if python is lanched via
274 its symbolic link.
275
Antoine Pitroud79dc622008-09-05 00:03:33 +0000276- Issue #3660: fix a memory leak in the C accelerator of the pickle module.
277
Antoine Pitrou1d6a16b2008-09-04 21:32:09 +0000278- Issue #3160: the "bdist_wininst" distutils command didn't work.
279
Guilherme Polob212b752008-09-04 11:21:31 +0000280- Issue #1658: tkinter changes dict size during iteration in both
281 tkinter.BaseWidget and tkinter.scrolledtext.ScrolledText.
282
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000283- The bsddb module (and therefore the dbm.bsd module) has been removed.
Gregory P. Smith451e99b2008-09-04 04:46:48 +0000284 It is now maintained outside of the standard library at
285 http://www.jcea.es/programacion/pybsddb.htm.
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000286
Facundo Batistac469d4c2008-09-03 22:49:01 +0000287- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
288 to the urlparse one. Added a DeprecationWarning in the old module, it
289 will be deprecated in the future.
290
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +0000291- Issue #3719: platform.architecture() fails if there are spaces in the
292 path to the Python binary.
293
Brett Cannonec92e182008-09-02 02:46:59 +0000294- Issue 3602: As part of the merge of r66135, make the parameters on
295 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
296
Benjamin Petersonb3085c92008-09-01 23:09:31 +0000297- The deprecation warnings for the camelCase threading API names were removed.
298
Jesse Noller338f5782008-09-03 18:22:19 +0000299- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
300 SEM_VALUE_MAX.
301
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000302Extension Modules
303-----------------
304
Antoine Pitrou9cadb1b2008-09-15 23:02:56 +0000305- Issue #3782: os.write() must not accept unicode strings.
306
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +0000307- Issue #2975: When compiling several extension modules with Visual Studio 2008
308 from the same python interpreter, some environment variables would grow
309 without limit.
310
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000311- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
312 exploitation of poor argument checking.
313
Jesus Cea6ba33292008-08-31 14:12:11 +0000314- bsddb code updated to version 4.7.3pre2. This code is the same than
315 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
316 The Python code is automatically translated using "2to3". Please, do not
317 update this code in Python 3.0 by hand. Update the 2.6 one and then
318 do "2to3".
319
Benjamin Peterson791dc2f2008-09-05 23:27:15 +0000320- The _bytesio and _stringio modules are now compiled into the python binary.
321
Gregory P. Smith693fc462008-09-06 20:13:06 +0000322- Issue #3492 and #3790: Fixed the zlib module and zipimport module uses of
323 mutable bytearray objects where they should have been using immutable bytes.
324
Gregory P. Smith0a608fd2008-09-06 21:34:51 +0000325- Issue #3797: Fixed the dbm, marshal, mmap, ossaudiodev, & winreg modules to
326 return bytes objects instead of bytearray objects.
327
Gregory P. Smith693fc462008-09-06 20:13:06 +0000328
Neal Norwitz8f2f22a2008-08-24 20:59:23 +0000329Tools/Demos
330-----------
331
332- Fix Misc/gdbinit so it works.
333
Barry Warsaw8509df72008-08-21 03:02:47 +0000334
Amaury Forgeot d'Arcf7bfcfb2008-09-09 06:42:00 +0000335Build
336-----
337
Hirokazu Yamamoto54a1cc62008-09-09 17:55:11 +0000338- Issue #3812: Failed to build python if configure --without-threads.
339
Amaury Forgeot d'Arcf7bfcfb2008-09-09 06:42:00 +0000340- Issue #3791: Remove the bsddb module from the Windows installer, and the
341 core bsddb library from the Windows build files.
342
343
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000344What's new in Python 3.0b3?
345===========================
346
Barry Warsaw57c10582008-08-21 02:39:51 +0000347*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000348
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000349Core and Builtins
350-----------------
351
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000352- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
353 arguments.
354
Antoine Pitrou616d2852008-08-19 22:09:34 +0000355- Issue #2394: implement more of the memoryview API, with the caveat that
356 only one-dimensional contiguous buffers are supported and exercised right
357 now. Slicing, slice assignment and comparison (equality and inequality)
358 have been added. Also, the tolist() method has been implemented, but only
359 for byte buffers. Endly, the API has been updated to return bytes objects
360 wherever it used to return bytearrays.
361
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000362- Issue #3560: clean up the new C PyMemoryView API so that naming is
363 internally consistent; add macros PyMemoryView_GET_BASE() and
364 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
365 without relying on a particular implementation; remove the ill-named
366 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
367
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000368- ctypes function pointers that are COM methods have a boolean True
369 value again.
370
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000371- Issue #1819: function calls with several named parameters are now on
372 average 35% faster (as measured by pybench).
373
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000374- The undocumented C APIs PyUnicode_AsString() and
375 PyUnicode_AsStringAndSize() were made private to the interpreter, in
376 order to be able to refine their interfaces for Python 3.1.
377
378 If you need to access the UTF-8 representation of a Unicode object
379 as bytes string, please use PyUnicode_AsUTF8String() instead.
380
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000381- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
382 to Python 3.0's stricter semantics which allow to avoid successive
383 reallocations of the result string (this also affects str.join()).
384
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000385
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000386Library
387-------
388
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000389- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
390 a build problem on MacOS with CJK locales. It adds four temporary
391 mappings to existing legacy codecs that are virtually compatible
392 with Mac encodings. They will be replaced by codecs correctly
393 implemented in 3.1.
394
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000395- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
396 "global name 'header' is not defined".
397
Antoine Pitroufd036452008-08-19 17:56:33 +0000398- Issue #2834: update the regular expression library to match the unicode
399 standards of py3k. In other words, mixing bytes and unicode strings
400 (be it as pattern, search string or replacement string) raises a TypeError.
401 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
402 and can be disabled by specifying a new re.ASCII flag; as for bytes
403 patterns, ASCII matching is the only option and trying to specify re.UNICODE
404 for such patterns raises a ValueError.
405
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000406- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
407 Code contributed by Matt Giuca. quote() now encodes the input
408 before quoting, unquote() decodes after unquoting. There are
409 new arguments to change the encoding and errors settings.
410 There are also new APIs to skip the encode/decode steps.
411 [un]quote_plus() are also affected.
412
Nick Coghlan36f49522008-08-18 12:31:52 +0000413- Issue #2235: numbers.Number now blocks inheritance of the default id()
414 based hash because that hash mechanism is not correct for numeric types.
415 All concrete numeric types that inherit from Number (rather than just
416 registering with it) must explicitly provide a hash implementation in
417 order for their instances to be hashable.
418
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000419- Issue #2676: in the email package, content-type parsing was hanging on
420 pathological input because of quadratic or exponential behaviour of a
421 regular expression.
422
Antoine Pitrou87695762008-08-14 22:44:29 +0000423- Issue #3476: binary buffered reading through the new "io" library is now
424 thread-safe.
425
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000426- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
427 menu entries were not deleted.
428
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000429- Remove the TarFileCompat class from tarfile.py.
430
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000431- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
432 accepts the same parameters. It just checks that its first argument is an
433 integer.
434
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000435- Issue #3394: zipfile.writestr sets external attributes when passed a
436 file name rather than a ZipInfo instance, so files are extracted with
437 mode 0600 rather than 000 under Unix.
438
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000439- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
440 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000441
Martin v. Löwis371bb502008-08-16 13:02:57 +0000442Extension Modules
443-----------------
444
445- Bug #3542: Support Unicode strings in _msi module.
446
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000447What's new in Python 3.0b2?
448===========================
449
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000450*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000451
452Core and Builtins
453-----------------
454
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000455- Issue #3008: the float type has a new instance method 'float.hex'
456 and a new class method 'float.fromhex' to convert floating-point
457 numbers to and from hexadecimal strings, respectively.
458
Eric Smithd68af8f2008-07-16 00:15:35 +0000459- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
460 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
461
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000462- Issue #3280: like chr(), the "%c" format now accepts unicode code points
463 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
464 "narrow Unicode" builds, the result is a string of 2 code units, forming a
465 UTF-16 surrogate pair.
466
Georg Brandld52429f2008-07-04 15:55:02 +0000467- Issue #3282: str.isprintable() should return False for undefined
468 Unicode characters.
469
Martin v. Löwis029656f2008-06-30 04:06:08 +0000470- Issue #3236: Return small longs from PyLong_FromString.
471
Benjamin Petersone6528212008-07-15 15:32:09 +0000472- Exception tracebacks now support exception chaining.
473
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000474Library
475-------
476
Brett Cannonc2542e92008-07-25 18:19:20 +0000477- Removed the sunaudio module. Use sunau instead.
478
Thomas Heller47bc8092008-08-19 06:38:12 +0000479- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
480 api functions without holding the GIL, which could lead to a fatal
481 error when they failed.
482
483- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
484
Georg Brandl30704ea02008-07-23 15:07:12 +0000485- Removed "ast" function aliases from the parser module.
486
Thomas Heller15383a02008-07-15 19:46:52 +0000487- Issue #3313: Fixed a crash when a failed dlopen() call does not set
488 a valid dlerror() message.
489
Thomas Heller0261e1e2008-07-15 17:25:07 +0000490- Issue #3258: Fixed a crash when a ctypes POINTER type to an
491 incomplete structure was created.
492
Georg Brandl1abcbf82008-07-01 19:28:43 +0000493- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
494 argument now must be a bytes object in any case.
495
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000496- Issue #3145: help("modules whatever") failed when trying to load the source
497 code of every single module of the standard library, including invalid files
498 used in the test suite.
499
Georg Brandlbded4d32008-07-17 18:15:35 +0000500- The gettext library now consistently uses Unicode strings for message ids
501 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000502
Benjamin Petersone6528212008-07-15 15:32:09 +0000503- The traceback module has been expanded to handle chained exceptions.
504
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000505C API
506-----
507
508- Issue #3247: the function Py_FindMethod was removed. Modern types should
509 use the tp_methods slot instead.
510
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000511Tools/Demos
512-----------
513
Georg Brandl336341f2008-07-01 20:21:28 +0000514- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000515
Georg Brandl336341f2008-07-01 20:21:28 +0000516- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000517
518
Brett Cannon0d71ee72008-05-08 18:13:40 +0000519What's new in Python 3.0b1?
520===========================
521
Barry Warsawc1e689e2008-06-19 00:35:43 +0000522*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000523
524Core and Builtins
525-----------------
526
Brett Cannondb734912008-06-27 00:52:15 +0000527- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
528 argument being anything other than a dict or None. Also fixed a bug in error
529 handling when 'message' and 'category' were both set to None, triggering a
530 bus error.
531
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000532- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
533 holds the last (strong) reference to its referent.
534
Georg Brandl559e5d72008-06-11 18:37:52 +0000535- Issue #2630: implement PEP 3138. repr() now returns printable
536 Unicode characters unescaped, to get an ASCII-only representation
537 of an object use ascii().
538
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000539- Issue #1342: On windows, Python could not start when installed in a
540 directory with non-ascii characters.
541
Martin v. Löwis1a214512008-06-11 05:26:20 +0000542- Implement PEP 3121: new module initialization and finalization API.
543
Georg Brandle1b5ac62008-06-04 13:06:58 +0000544- Removed the already-defunct ``-t`` option.
545
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000546- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
547 unmarshalling many code objects, which happens when importing a
548 large .pyc file (~1000 functions).
549
Georg Brandl52b92cc2008-05-25 09:43:03 +0000550- Issue #2963: fix merging oversight that disabled method cache for
551 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000552
Georg Brandlc9b09532008-05-25 09:24:38 +0000553- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
554
Georg Brandl52b92cc2008-05-25 09:43:03 +0000555- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000556
Georg Brandl52b92cc2008-05-25 09:43:03 +0000557- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
558 code now allows any unicode string and returns a utf-8 encoded
559 buffer, just like the "s#" code already does. The "z" code was
560 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000561
Georg Brandl52b92cc2008-05-25 09:43:03 +0000562- Issue #2863: generators now have a ``gen.__name__`` attribute that
563 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
564 ``func.func_code.co_name``. The repr() of a generator now also
565 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000566
567- Issue #2831: enumerate() now has a ``start`` argument.
568
Georg Brandl52b92cc2008-05-25 09:43:03 +0000569- Issue #2801: fix bug in the float.is_integer method where a
570 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000571
Georg Brandl52b92cc2008-05-25 09:43:03 +0000572- The ``--with-toolbox-glue`` option (and the associated
573 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000574
Georg Brandl52b92cc2008-05-25 09:43:03 +0000575- Issue #2196: hasattr() now lets exceptions which do not inherit
576 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
577 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000578
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000579- #3021 Exception reraising sematics have been significantly improved. However,
580 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
581 code anymore.
582
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000583- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
584 removed.
585
Brett Cannon0d71ee72008-05-08 18:13:40 +0000586Extension Modules
587-----------------
588
Georg Brandl38feaf02008-05-25 07:45:51 +0000589- Renamed ``_winreg`` module to ``winreg``.
590
Georg Brandl52b92cc2008-05-25 09:43:03 +0000591- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
592 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000593
594- Support for Windows 9x has been removed from the winsound module.
595
Georg Brandl52b92cc2008-05-25 09:43:03 +0000596- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000597
Brett Cannon0d71ee72008-05-08 18:13:40 +0000598Library
599-------
600
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000601- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
602 symtable.Symbol have been removed.
603
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000604- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
605
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000606- a new ``urllib`` package was created. It consists of code from
607 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
608 modules have all been removed. The new package has five submodules:
609 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
610 ``urllib.error``, and ``urllib.robotparser``. The
611 ``urllib.request.urlopen()`` function uses the url opener from
612 ``urllib2``. (Note that the unittests have not been renamed for the
613 beta, but they will be renamed in the future.)
614
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000615- rfc822 has been removed in favor of the email package.
616
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000617- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000618
Barry Warsawf5019422008-06-12 02:42:00 +0000619- Patch #2849: Remove use of rfc822 module from standard library.
620
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000621- Added C optimized implementation of io.StringIO.
622
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000623- The ``pickle`` module is now automatically use an optimized C
624 implementation of Pickler and Unpickler when available. The
625 ``cPickle`` module is no longer needed.
626
Georg Brandl877b10a2008-06-01 21:25:55 +0000627- Removed the ``htmllib`` and ``sgmllib`` modules.
628
Georg Brandl61013952008-05-28 15:56:30 +0000629- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
630 been removed from ``http.cookies``.
631
Brett Cannona23810f2008-05-26 19:04:21 +0000632- The ``commands`` module has been removed. Its getoutput() and
633 getstatusoutput() functions have been moved to the ``subprocess`` module.
634
Georg Brandl3d5c4252008-05-26 18:03:26 +0000635- The ``http`` package was created; it contains the old ``httplib``
636 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
637 as ``http.cookiejar``, and the content of the three ``HTTPServer``
638 modules as ``http.server``.
639
Georg Brandl38eceaa2008-05-26 11:14:17 +0000640- The ``xmlrpc`` package was created; it contains the old
641 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
642 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000643 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000644
645- The ``dbm`` package was created, containing the old modules
646 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
647 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
648 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
649 as submodules.
650
Georg Brandl52b92cc2008-05-25 09:43:03 +0000651- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000652
Georg Brandl52b92cc2008-05-25 09:43:03 +0000653- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000654
Georg Brandl52b92cc2008-05-25 09:43:03 +0000655- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000656
Georg Brandl52b92cc2008-05-25 09:43:03 +0000657- Issue #2250: Exceptions raised during evaluation of names in
658 rlcompleter's ``Completer.complete()`` method are now caught and
659 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000660
Georg Brandl52b92cc2008-05-25 09:43:03 +0000661- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
662 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000663
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000664- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
665 large to fit in a C long. ldexp(x, n) now returns a zero (with
666 suitable sign) if n is large and negative; previously, it raised
667 OverflowError.
668
Georg Brandl52b92cc2008-05-25 09:43:03 +0000669- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000670
Georg Brandl52b92cc2008-05-25 09:43:03 +0000671- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000672
Georg Brandl52b92cc2008-05-25 09:43:03 +0000673- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000674
Georg Brandl52b92cc2008-05-25 09:43:03 +0000675- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000676
Georg Brandl52b92cc2008-05-25 09:43:03 +0000677- Fixed the ``__all__`` setting on ``collections`` to include
678 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000679
Brett Cannoncf3520c2008-05-11 22:47:58 +0000680- The sre module has been removed.
681
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000682- The Queue module has been renamed to queue.
683
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000684- The copy_reg module has been renamed to copyreg.
685
Brett Cannond8b61ee2008-05-11 03:00:26 +0000686- The mhlib module has been removed.
687
Brett Cannonbd474422008-05-10 22:42:14 +0000688- The ihooks module has been removed.
689
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000690- The fpformat module has been removed.
691
Brett Cannonf4fd9932008-05-10 21:11:46 +0000692- The dircache module has been removed.
693
Brett Cannond175b4c2008-05-10 03:19:54 +0000694- The Canvas module has been removed.
695
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000696- The Decimal module gained the magic methods __round__, __ceil__,
697 __floor__ and __trunc__, to give support for round, math.ceil,
698 math.floor and math.trunc.
699
Brett Cannon900ee3a2008-05-08 20:31:11 +0000700- The user module has been removed.
701
Brett Cannon34afe872008-05-08 20:31:44 +0000702- The mutex module has been removed.
703
Brett Cannon0d71ee72008-05-08 18:13:40 +0000704- The imputil module has been removed.
705
Georg Brandl52b92cc2008-05-25 09:43:03 +0000706- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000707
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000708- pdb gained the "until" command.
709
Georg Brandl52b92cc2008-05-25 09:43:03 +0000710- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000711
Georg Brandl32de7af2008-08-18 23:07:41 +0000712- The threading module API was renamed to be PEP 8 compliant. The
713 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000714
Georg Brandl294d5a92008-06-01 19:25:32 +0000715Tools/Demos
716-----------
717
718- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000719
Brett Cannon0d71ee72008-05-08 18:13:40 +0000720Build
721-----
722
723
Barry Warsaw66079cd2008-04-04 01:36:36 +0000724What's New in Python 3.0a5?
725===========================
726
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000727*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000728
729Core and Builtins
730-----------------
731
Georg Brandl52b92cc2008-05-25 09:43:03 +0000732- Fixed misbehaviour of PyLong_FromSsize_t on systems where
733 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000734
Georg Brandl52b92cc2008-05-25 09:43:03 +0000735- Issue #2221: Corrected a SystemError "error return without exception
736 set", when the code executed by exec() raises an exception, and
737 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000738
Georg Brandl52b92cc2008-05-25 09:43:03 +0000739- Bug #2565: The repr() of type objects now calls them 'class', not
740 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000741
Martin v. Löwis790465f2008-04-05 20:41:37 +0000742- The command line processing was converted to pass Unicode strings
743 through as unmodified as possible; as a consequence, the C API
744 related to command line arguments was changed to use wchar_t.
745
Georg Brandl52b92cc2008-05-25 09:43:03 +0000746- All backslashes in raw strings are interpreted literally. This
747 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000748
Barry Warsaw66079cd2008-04-04 01:36:36 +0000749Extension Modules
750-----------------
751
752Library
753-------
754
Georg Brandl52b92cc2008-05-25 09:43:03 +0000755- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000756
Thomas Hellere106dc32008-04-24 18:39:36 +0000757- Issue #2682: ctypes callback functions now longer contain a cyclic
758 reference to themselves.
759
Georg Brandl52b92cc2008-05-25 09:43:03 +0000760- Issue #2058: Remove the buf attribute and add __slots__ to the
761 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000762
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000763- Bug #2606: Avoid calling .sort() on a dict_keys object.
764
Thomas Hellerbff533b2008-04-04 19:53:14 +0000765- The bundled libffi copy is now in sync with the recently released
766 libffi3.0.5 version, apart from some small changes to
767 Modules/_ctypes/libffi/configure.ac.
768
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000769Build
770-----
771
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000772- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
773
Guido van Rossumdc21db32008-04-07 18:37:41 +0000774- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000775 accidentally overwriting a Python 2.x installation. Use "make
776 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000777
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000778- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
779 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000780
Georg Brandl52b92cc2008-05-25 09:43:03 +0000781
Barry Warsawa9d499d2008-03-01 18:38:07 +0000782What's New in Python 3.0a4?
783===========================
784
Barry Warsawbb5cd082008-04-02 23:33:27 +0000785*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000786
Martin v. Löwis25931462008-03-17 20:43:42 +0000787Core and Builtins
788-----------------
789
790- Bug #2301: Don't try decoding the source code into the original
791 encoding for syntax errors.
792
Martin v. Löwis92fab752008-03-08 10:40:41 +0000793Extension Modules
794-----------------
795
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000796- The dl module was removed, use the ctypes module instead.
797
Martin v. Löwis92fab752008-03-08 10:40:41 +0000798- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000799
Martin v. Löwis071ef772008-03-08 11:24:24 +0000800Library
801-------
802
Georg Brandl52b92cc2008-05-25 09:43:03 +0000803- The class distutils.commands.build_py.build_py_2to3 can be used as a
804 build_py replacement to automatically run 2to3 on modules that are
805 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000806
Guido van Rossumf4169812008-03-17 22:56:06 +0000807- A new pickle protocol (protocol 3) is added with explicit support
808 for bytes. This is the default protocol. It intentionally cannot
809 be unpickled by Python 2.x.
810
811- When a pickle written by Python 2.x contains an (8-bit) str
812 instance, this is now decoded to a (Unicode) str instance. The
813 encoding used to do this defaults to ASCII, but can be overridden
814 via two new keyword arguments to the Unpickler class. Previously
815 this would create bytes instances, which is usually wrong: str
816 instances are often used to pickle attribute names etc., and text is
817 more common than binary data anyway.
818
Martin v. Löwis071ef772008-03-08 11:24:24 +0000819- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000820 system doesn't support CODESET and LANG isn't set or doesn't allow
821 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000822
Georg Brandl52b92cc2008-05-25 09:43:03 +0000823- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
824 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000825
Georg Brandl52b92cc2008-05-25 09:43:03 +0000826- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
827 has been renamed tokenize and now works with bytes rather than
828 strings. A new detect_encoding function has been added for
829 determining source file encoding according to PEP-0263. Token
830 sequences returned by tokenize always start with an ENCODING token
831 which specifies the encoding used to decode the file. This token is
832 used to encode the output of untokenize back to bytes.
833
Barry Warsawa9d499d2008-03-01 18:38:07 +0000834
Christian Heimesbc873412007-12-08 22:11:32 +0000835What's New in Python 3.0a3?
836===========================
837
Barry Warsaw659fc422008-03-01 17:45:23 +0000838*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000839
840Core and Builtins
841-----------------
842
Georg Brandl52b92cc2008-05-25 09:43:03 +0000843- Issue #2282: io.TextIOWrapper was not overriding seekable() from
844 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000845
Georg Brandl52b92cc2008-05-25 09:43:03 +0000846- Issue #2115: Important speedup in setting __slot__ attributes. Also
847 prevent a possible crash: an Abstract Base Class would try to access
848 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000849
Georg Brandl52b92cc2008-05-25 09:43:03 +0000850- Fixed repr() and str() of complex numbers with infinity or nan as
851 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000852
Georg Brandl52b92cc2008-05-25 09:43:03 +0000853- Clear all free list during a gc.collect() of the highest generation
854 in order to allow pymalloc to free more arenas. Python may give back
855 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000856
Georg Brandl52b92cc2008-05-25 09:43:03 +0000857- Issue #2045: Fix an infinite recursion triggered when printing a
858 subclass of collections.defaultdict, if its default_factory is set
859 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000860
861- Fixed a minor memory leak in dictobject.c. The content of the free
862 list was not freed on interpreter shutdown.
863
Georg Brandl52b92cc2008-05-25 09:43:03 +0000864- Limit free list of method and builtin function objects to 256
865 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000866
Georg Brandl52b92cc2008-05-25 09:43:03 +0000867- Patch #1953: Added ``sys._compact_freelists()`` and the C API
868 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000869 to compact the internal free lists of pre-allocted ints and floats.
870
871- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000872 Python expected the return type int but the fork familie returns
873 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000874
Georg Brandl52b92cc2008-05-25 09:43:03 +0000875- Issue #1678380: Fix a bug that identifies 0j and -0j when they
876 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000877
Georg Brandl52b92cc2008-05-25 09:43:03 +0000878- Issue #2025: Added tuple.count() and tuple.index() methods to comply
879 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000880
Georg Brandl52b92cc2008-05-25 09:43:03 +0000881- Fixed multiple reinitialization of the Python interpreter. The small
882 int list in longobject.c has caused a seg fault during the third
883 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000884
Georg Brandl52b92cc2008-05-25 09:43:03 +0000885- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000886
Georg Brandl52b92cc2008-05-25 09:43:03 +0000887- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000888
Georg Brandl52b92cc2008-05-25 09:43:03 +0000889- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000890
Georg Brandl52b92cc2008-05-25 09:43:03 +0000891- map() no longer accepts None for the first argument. Use zip()
892 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000893
Facundo Batista2336bdd2008-01-19 19:12:01 +0000894- Issue #1769: Now int("- 1") is not allowed any more.
895
Georg Brandl52b92cc2008-05-25 09:43:03 +0000896- Object/longobject.c: long(float('nan')) raises an OverflowError
897 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000898
Georg Brandl52b92cc2008-05-25 09:43:03 +0000899- Issue #1762972: __file__ points to the source file instead of the
900 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000901
Guido van Rossumab078dd2008-01-06 00:09:11 +0000902- Issue #1393: object_richcompare() returns NotImplemented instead of
903 False if the objects aren't equal, to give the other side a chance.
904
Guido van Rossume239b002008-01-06 00:44:20 +0000905- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000906
Georg Brandl52b92cc2008-05-25 09:43:03 +0000907- Improve some exception messages when Windows fails to load an
908 extension module. Now we get for example '%1 is not a valid Win32
909 application' instead of 'error code 193'. Also use Unicode strings
910 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000911
Georg Brandl52b92cc2008-05-25 09:43:03 +0000912- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
913 Python C API has gained a new type *PyInstanceMethod_Type* and the
914 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
915 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000916
Georg Brandl52b92cc2008-05-25 09:43:03 +0000917- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
918 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
919 are now enough to print the corresponding list of objects considered
920 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000921
Georg Brandl52b92cc2008-05-25 09:43:03 +0000922- Issue #1573: Improper use of the keyword-only syntax makes the
923 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000924
Georg Brandl52b92cc2008-05-25 09:43:03 +0000925- Issue #1564: The set implementation should special-case PyUnicode
926 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000927
Guido van Rossumea6775b2008-02-21 20:16:31 +0000928- Patch #1031213: Decode source line in SyntaxErrors back to its
929 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000930
Christian Heimes09aaa882008-02-23 15:01:06 +0000931- inspect.getsource() includes the decorators again.
932
Guido van Rossumea6775b2008-02-21 20:16:31 +0000933- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
934 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000935
Georg Brandl52b92cc2008-05-25 09:43:03 +0000936- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
937 the first chunk fed to the decoder started with a BOM, but was
938 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000939
Christian Heimesbc873412007-12-08 22:11:32 +0000940Extension Modules
941-----------------
942
Georg Brandl52b92cc2008-05-25 09:43:03 +0000943- Code for itertools ifilter(), imap(), and izip() moved to bultins
944 and renamed to filter(), map(), and zip(). Also, renamed
945 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000946
Georg Brandl52b92cc2008-05-25 09:43:03 +0000947- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000948
Georg Brandl52b92cc2008-05-25 09:43:03 +0000949- Bug #2111: mmap segfaults when trying to write a block opened with
950 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000951
Georg Brandl52b92cc2008-05-25 09:43:03 +0000952- Issue #2063: correct order of utime and stime in os.times() result
953 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000954
Christian Heimesbc873412007-12-08 22:11:32 +0000955Library
956-------
957
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000958- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000959
Georg Brandl52b92cc2008-05-25 09:43:03 +0000960- Created new UserDict class in collections module. This one inherits
961 from and complies with the MutableMapping ABC. Also, moved
962 UserString and UserList to the collections module. The
963 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000964
Guido van Rossumea6775b2008-02-21 20:16:31 +0000965- Removed UserDict.DictMixin. Replaced all its uses with
966 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000967
Guido van Rossume239b002008-01-06 00:44:20 +0000968- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000969
Guido van Rossume239b002008-01-06 00:44:20 +0000970- Issue #1585: IDLE uses non-existent xrange() function.
971
972- Issue #1578: Problems in win_getpass.
973
Georg Brandl52d168a2008-01-07 18:10:24 +0000974Build
975-----
976
Georg Brandl52b92cc2008-05-25 09:43:03 +0000977- Renamed --enable-unicode configure flag to --with-wide-unicode,
978 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000979
Guido van Rossume239b002008-01-06 00:44:20 +0000980C API
981-----
982
983- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
984 Py_TYPE and Py_REFCNT.
985
Georg Brandl52b92cc2008-05-25 09:43:03 +0000986- New API PyImport_ImportModuleNoBlock(), works like
987 PyImport_ImportModule() but won't block on the import lock
988 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000989
Christian Heimesbc873412007-12-08 22:11:32 +0000990
Fred Drake0e474a82007-10-11 18:01:43 +0000991What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000992===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000993
Guido van Rossum99533a92007-12-06 05:07:41 +0000994*Release date: 07-Dec-2007*
995
996(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000997
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000998Core and Builtins
999-----------------
1000
Brett Cannon37f7e6e2007-10-26 05:42:09 +00001001- str8 now has the same construction signature as bytes.
1002
Georg Brandl52b92cc2008-05-25 09:43:03 +00001003- Comparisons between str and str8 now return False/True for ==/!=.
1004 sqlite3 returns str8 when recreating on object from it's __conform__
1005 value. The struct module returns str8 for all string-related
1006 formats. This was true before this change, but becomes more
1007 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +00001008
Georg Brandl52b92cc2008-05-25 09:43:03 +00001009- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
1010 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +00001011
1012- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
1013
1014- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +00001015 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +00001016 `PyUnicode_DecodeFSDefault(char*)` was added.
1017
Georg Brandl52b92cc2008-05-25 09:43:03 +00001018- io.open() and _fileio.FileIO have grown a new argument closefd. A
1019 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +00001020
Georg Brandl52b92cc2008-05-25 09:43:03 +00001021- Added a new option -b to issues warnings (-bb for errors) about
1022 certain operations between bytes/buffer and str like str(b'') and
1023 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +00001024
Georg Brandl52b92cc2008-05-25 09:43:03 +00001025- The standards streams sys.stdin, stdout and stderr may be None when
1026 the when the C runtime library returns an invalid file descriptor
1027 for the streams (fileno(stdin) < 0). For now this happens only for
1028 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +00001029
Christian Heimesbce52be2007-11-17 19:08:41 +00001030- Added PCbuild9 directory for VS 2008.
1031
Georg Brandl52b92cc2008-05-25 09:43:03 +00001032- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
1033 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +00001034
Georg Brandl52b92cc2008-05-25 09:43:03 +00001035- Unbound methods are gone for good. ClassObject.method returns an
1036 ordinary function object, instance.method still returns a bound
1037 method object. The API of bound methods is cleaned up, too. The
1038 im_class attribute is removed and im_func + im_self are renamed to
1039 __func__ and __self__. The factory PyMethod_New takes only func and
1040 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +00001041
Georg Brandl52b92cc2008-05-25 09:43:03 +00001042- intobject.h is no longer included by Python.h. The remains were
1043 moved to longobject.h. It still exists to define several aliases
1044 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +00001045
Christian Heimesa37d4c62007-12-04 23:02:19 +00001046- Removed sys.maxint, use sys.maxsize instead.
1047
Fred Drake0e474a82007-10-11 18:01:43 +00001048Extension Modules
1049-----------------
1050
1051- The `hotshot` profiler has been removed; use `cProfile` instead.
1052
Brett Cannone9fd2312007-10-12 19:18:19 +00001053Library
1054-------
1055
Georg Brandl52b92cc2008-05-25 09:43:03 +00001056- When loading an external file using testfile(), the passed-in
1057 encoding argument was being ignored if __loader__ is defined and
1058 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +00001059
Georg Brandl52b92cc2008-05-25 09:43:03 +00001060- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
1061 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +00001062
Christian Heimesc9543e42007-11-28 08:28:28 +00001063- Removed the 'new' module.
1064
Georg Brandl52b92cc2008-05-25 09:43:03 +00001065- Removed all types from the 'types' module that are easily accessable
1066 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +00001067
Georg Brandl52d168a2008-01-07 18:10:24 +00001068
Guido van Rossum4405cf32007-08-30 17:16:55 +00001069What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +00001070==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +00001071
Guido van Rossum4405cf32007-08-30 17:16:55 +00001072*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +00001073
1074Core and Builtins
1075-----------------
1076
Martin v. Löwis47383402007-08-15 07:32:56 +00001077- PEP 3131: Support non-ASCII identifiers.
1078
Martin v. Löwis447d33e2007-07-29 18:10:01 +00001079- PEP 3120: Change default encoding to UTF-8.
1080
Martin v. Löwis9f2e3462007-07-21 17:22:18 +00001081- PEP 3123: Use proper C inheritance for PyObject.
1082
Guido van Rossumcd16bf62007-06-13 18:07:49 +00001083- Removed the __oct__ and __hex__ special methods and added a bin()
1084 builtin function.
1085
Georg Brandl52b92cc2008-05-25 09:43:03 +00001086- PEP 3127: octal literals now start with "0o". Old-style octal
1087 literals are invalid. There are binary literals with a prefix of
1088 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +00001089
Guido van Rossume7ba4952007-06-06 23:52:48 +00001090- None, True, False are now keywords.
1091
Guido van Rossum29478ef2007-05-29 00:39:44 +00001092- PEP 3119: isinstance() and issubclass() can be overridden.
1093
Guido van Rossumebe3e162007-05-17 18:20:34 +00001094- Remove BaseException.message.
1095
Guido van Rossum1bc535d2007-05-15 18:46:22 +00001096- Remove tuple parameter unpacking (PEP 3113).
1097
Georg Brandl52b92cc2008-05-25 09:43:03 +00001098- Remove the f_restricted attribute from frames. This naturally leads
1099 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +00001100
Georg Brandl52b92cc2008-05-25 09:43:03 +00001101- PEP 3132 was accepted. That means that you can do ``a, *b =
1102 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +00001103
Georg Brandl52b92cc2008-05-25 09:43:03 +00001104- range() now returns an iterator rather than a list. Floats are not
1105 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +00001106
Nick Coghlan650f0d02007-04-15 12:05:43 +00001107- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +00001108 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +00001109
Guido van Rossume27dc722007-03-27 22:37:34 +00001110- By default, != returns the opposite of ==, unless the latter returns
1111 NotImplemented.
1112
Georg Brandl52b92cc2008-05-25 09:43:03 +00001113- Patch #1680961: sys.exitfunc has been removed and replaced with a
1114 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +00001115
Georg Brandl801dd732007-03-18 20:18:31 +00001116- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +00001117 keyword arg in the class statement, which can now use the full
1118 syntax of a parameter list. Also, the metaclass can implement a
1119 __prepare__ function which will be called to create the dictionary
1120 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +00001121
Georg Brandl428f0642007-03-18 18:35:15 +00001122- The long-deprecated argument "pend" of PyFloat_FromString() has been
1123 removed.
1124
Georg Brandle32b4222007-03-10 22:13:27 +00001125- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +00001126 its argument, if it exists. If not, it will work like before. This
1127 allows customizing the output of dir() in the presence of a
1128 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +00001129
Neal Norwitz8dfc4a92007-08-11 06:39:53 +00001130- Removed support for __members__ and __methods__.
1131
Georg Brandle32b4222007-03-10 22:13:27 +00001132- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +00001133
Georg Brandle32b4222007-03-10 22:13:27 +00001134- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +00001135 functionality formerly known as raw_input(); the name raw_input() is
1136 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +00001137
Georg Brandl52b92cc2008-05-25 09:43:03 +00001138- Classes listed in an 'except' clause must inherit from
1139 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +00001140
Guido van Rossumcc2b0162007-02-11 06:12:03 +00001141- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +00001142 and .keys(), .items(), .values() return dict views, which behave
1143 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +00001144
Guido van Rossum8b545362007-02-09 23:52:14 +00001145- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +00001146 'softspace' attribute of files is now gone (since print() doesn't
1147 use it). A side effect of this change is that you can get
1148 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +00001149
1150 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +00001151 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +00001152
1153 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +00001154
Brett Cannon398db8b2007-01-29 23:44:37 +00001155- PEP 3102: keyword-only arguments.
1156
Georg Brandl52b92cc2008-05-25 09:43:03 +00001157- Int/Long unification is complete. The 'long' built-in type and
1158 literals with trailing 'L' or 'l' have been removed. Performance
1159 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +00001160
1161- 'except E, V' must now be spelled as 'except E as V' and deletes V
1162 at the end of the except clause; V must be a simple name.
1163
Neal Norwitzc1505362006-12-28 06:47:50 +00001164- Added function annotations per PEP 3107.
1165
Georg Brandl52b92cc2008-05-25 09:43:03 +00001166- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +00001167
1168 >>> def f(x):
1169 ... def inc():
1170 ... nonlocal x
1171 ... x += 1
1172 ... return x
1173 ... return inc
1174 ...
1175 >>> inc = f(0)
1176 >>> inc()
1177 1
1178 >>> inc()
1179 2
1180
Georg Brandl66a796e2006-12-19 20:50:34 +00001181- Moved intern() to sys.intern().
1182
1183- exec is now a function.
1184
1185- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +00001186
Neal Norwitz4886cc32006-08-21 17:06:07 +00001187- Classic classes are a thing of the past. All classes are new style.
1188
1189- Exceptions *must* derive from BaseException.
1190
1191- Integer division always returns a float. The -Q option is no more.
1192 All the following are gone:
1193 * PyNumber_Divide and PyNumber_InPlaceDivide
1194 * __div__, __rdiv__, and __idiv__
1195 * nb_divide, nb_inplace_divide
1196 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
1197 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
1198 if we want to re-use __div__ and friends. If we do, it will make
1199 it harder to write code for both 2.x and 3.x.)
1200
1201- 'as' and 'with' are keywords.
1202
1203- Absolute import is the default behavior for 'import foo' etc.
1204
Georg Brandl52b92cc2008-05-25 09:43:03 +00001205- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001206
Georg Brandl52b92cc2008-05-25 09:43:03 +00001207- Removed these Python builtins: apply(), callable(), coerce(),
1208 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +00001209
Georg Brandl52b92cc2008-05-25 09:43:03 +00001210- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001211
Georg Brandl52b92cc2008-05-25 09:43:03 +00001212- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001213
1214- Remove C API support for restricted execution.
1215
Guido van Rossumcf1be882007-08-30 22:07:17 +00001216- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +00001217 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +00001218 sequences of unequal length -- it now stops after the shortest one
1219 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001220
Georg Brandl52b92cc2008-05-25 09:43:03 +00001221- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001222
1223- Added class decorators per PEP 3129.
1224
1225
1226Extension Modules
1227-----------------
1228
Georg Brandl52b92cc2008-05-25 09:43:03 +00001229- Removed the imageop module. Obsolete long with its unit tests
1230 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001231
Georg Brandl52b92cc2008-05-25 09:43:03 +00001232- Removed these attributes from the operator module: div, idiv,
1233 __div__, __idiv__, isCallable, sequenceIncludes.
1234
1235- Removed these attributes from the sys module: exc_clear(), exc_type,
1236 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001237
1238
1239Library
1240-------
1241
Georg Brandl52b92cc2008-05-25 09:43:03 +00001242- Removed the compiler package. Use of the _ast module and (an
1243 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001244
Georg Brandl52b92cc2008-05-25 09:43:03 +00001245- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
1246 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
1247 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001248
Georg Brandl52b92cc2008-05-25 09:43:03 +00001249- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001250
Georg Brandl52b92cc2008-05-25 09:43:03 +00001251- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1252 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1253 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001254
Georg Brandl52b92cc2008-05-25 09:43:03 +00001255- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001256
Georg Brandl52b92cc2008-05-25 09:43:03 +00001257- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001258 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001259
Georg Brandl52b92cc2008-05-25 09:43:03 +00001260- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001261
Georg Brandl52b92cc2008-05-25 09:43:03 +00001262- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001263
1264- Patch #1680961: atexit has been reimplemented in C.
1265
Walter Dörwald41980ca2007-08-16 21:55:45 +00001266- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1267
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001268Build
1269-----
1270
1271C API
1272-----
1273
Georg Brandl52b92cc2008-05-25 09:43:03 +00001274- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001275
Georg Brandl52b92cc2008-05-25 09:43:03 +00001276- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1277 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001278
Georg Brandl52b92cc2008-05-25 09:43:03 +00001279- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001280
Georg Brandl52b92cc2008-05-25 09:43:03 +00001281- Removed these macros: staticforward, statichere, PyArg_GetInt,
1282 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001283
Georg Brandl52b92cc2008-05-25 09:43:03 +00001284- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1285 intintobjargproc, getreadbufferproc, getwritebufferproc,
1286 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001287
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001288Tests
1289-----
1290
Brett Cannone7a30f72008-03-03 03:36:27 +00001291- Removed test.testall as test.regrtest replaces it.
1292
Brett Cannonced04e02005-02-13 22:53:22 +00001293Documentation
1294-------------
1295
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001296Mac
1297---
1298
Georg Brandl52b92cc2008-05-25 09:43:03 +00001299- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001300
Guido van Rossum845702c2007-08-30 18:44:53 +00001301Platforms
1302---------
1303
1304- Support for BeOS and AtheOS was removed (according to PEP 11).
1305
1306- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1307
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001308Tools/Demos
1309-----------
1310
Georg Brandl52b92cc2008-05-25 09:43:03 +00001311
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001312**(For information about older versions, consult the HISTORY file.)**