blob: acedeb1d4b6aeb9bca566233ce97fa907f9421ea [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
Martin v. Löwis276c3712008-11-17 16:22:11 +000016- Issue #3327: Don't overallocate in the modules_by_index list.
17
Raymond Hettinger7d99f092008-11-16 11:44:54 +000018- Issue #1721812: Binary set operations and copy() returned the input type
19 instead of the appropriate base type. This was incorrect because set
20 subclasses would be created without their __init__() method being called.
21 The corrected behavior brings sets into line with lists and dicts.
22
Mark Dickinson4a1f5932008-11-12 23:23:36 +000023- Issue #4296: Fix PyObject_RichCompareBool so that "x in [x]" evaluates to
24 True, even when x doesn't compare equal to itself. This was a regression
25 from 2.6.
26
Amaury Forgeot d'Arc9a5499b2008-11-11 23:04:59 +000027- Issue #3705: Command-line arguments were not correctly decoded when the
28 terminal does not use UTF8.
29
Barry Warsawa7c37302008-11-07 03:46:33 +000030Library
31-------
32
Benjamin Peterson3d4ca742008-11-12 21:39:01 +000033- Issue #4307: The named tuple that ``inspect.getfullargspec()`` returns now
34 uses ``kwonlydefaults`` instead of ``kwdefaults``.
35
Amaury Forgeot d'Arc3e4e72f2008-11-11 20:05:06 +000036- Issue #4298: Fix a segfault when pickle.loads is passed a ill-formed input.
37
38- Issue #4283: Fix a left-over "iteritems" call in distutils.
Georg Brandlda066062008-11-08 15:15:57 +000039
Martin v. Löwisbfda5442008-11-07 18:54:51 +000040Build
41-----
42
43- Issue #1656675: Register a drop handler for .py* files on Windows.
44
Benjamin Peterson06fd5f82008-11-08 17:24:34 +000045Tools/Demos
46-----------
47
48- Demos of the socketserver module now work with Python 3.
49
Barry Warsawa7c37302008-11-07 03:46:33 +000050
Barry Warsaw1f0e67e2008-11-06 03:29:32 +000051What's New in Python 3.0 release candidate 2
52============================================
Guido van Rossumf0af3e32008-10-02 18:55:37 +000053
Barry Warsaw1f0e67e2008-11-06 03:29:32 +000054*Release date: 05-Nov-2008*
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +000055
56Core and Builtins
57-----------------
58
Benjamin Petersond968e272008-11-05 22:48:33 +000059- Issue #4211: The __path__ attribute of frozen packages is now a list instead
60 of a string as required by PEP 302.
61
Benjamin Peterson93ef79c2008-11-05 22:49:09 +000062- Issue #3727: Fixed poplib.
Christian Heimesd3956292008-11-05 19:48:27 +000063
Christian Heimes933238a2008-11-05 19:44:21 +000064- Issue #3714: Fixed nntplib by using bytes where appropriate.
65
Christian Heimesfb5faf02008-11-05 19:39:50 +000066- Issue #1210: Fixed imaplib and its documentation.
67
Christian Heimesecc42a22008-11-05 19:30:32 +000068- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
69 method on file objects with closefd=False. The file descriptor is still
70 kept open but the file object behaves like a closed file. The ``FileIO``
71 object also got a new readonly attribute ``closefd``.
72
Amaury Forgeot d'Arcdd8059f2008-10-30 23:03:32 +000073- Issue #3626: On cygwin, starting python with a non-existent script name
74 would not display anything if the file name is only 1 character long.
75
Amaury Forgeot d'Arc424b4812008-10-30 22:25:31 +000076- Issue #4176: Fixed a crash when pickling an object which ``__reduce__``
77 method does not return iterators for the 4th and 5th items.
78
Amaury Forgeot d'Arcdd8059f2008-10-30 23:03:32 +000079- Issue #3723: Fixed initialization of subinterpreters.
Christian Heimes6a27efa2008-10-30 21:48:26 +000080
Christian Heimes5833a2f2008-10-30 21:40:04 +000081- Issue #4213: The file system encoding is now normalized by the
82 codec subsystem, for example UTF-8 is turned into utf-8.
83
Christian Heimes9c94ba42008-10-30 21:34:02 +000084- Issue #4200: Changed the atexit module to store its state in its
85 PyModuleDef atexitmodule. This fixes a bug with multiple subinterpeters.
86
Christian Heimesfec925b2008-10-30 21:22:55 +000087- Issue #4237: io.FileIO() was raising invalid warnings caused by
88 insufficient initialization of PyFileIOObject struct members.
89
Amaury Forgeot d'Arcf43ee812008-10-30 20:58:42 +000090- Issue #4170: Pickling a collections.defaultdict object would crash the
91 interpreter.
92
Benjamin Peterson08a8f5f2008-10-19 14:15:00 +000093- Issue #4146: Compilation on OpenBSD has been restored.
94
Brett Cannonda780432008-10-17 03:38:50 +000095- Issue #3574: compile() incorrectly handled source code encoded as Latin-1.
96
Amaury Forgeot d'Arccf8016a2008-10-09 23:37:48 +000097- Issues #2384 and #3975: Tracebacks were not correctly printed when the
98 source file contains a ``coding:`` header: the wrong line was displayed, and
99 the encoding was not respected.
100
Martin v. Löwis4e0630c2008-10-07 13:16:28 +0000101- Issue #3740: Null-initialize module state.
102
Benjamin Peterson60320cb2008-09-26 21:49:22 +0000103- Issue #3946: PyObject_CheckReadBuffer crashed on a memoryview object.
104
Amaury Forgeot d'Arcd0db98f2008-09-21 21:49:01 +0000105- Issue #1688: On Windows, the input() prompt was not correctly displayed if it
106 contains non-ascii characters.
107
Martin v. Löwis6fea2332008-09-25 04:15:27 +0000108- Bug #3951: Py_USING_MEMORY_DEBUGGER should not be enabled by default.
109
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +0000110Library
111-------
112
Amaury Forgeot d'Arc87eee632008-10-17 20:15:53 +0000113- Issue #3664: The pickle module could segfault if a subclass of Pickler fails
114 to call the base __init__ method.
115
116- Issue #3725: telnetlib now works completely in bytes.
Benjamin Peterson3de7fb82008-10-15 20:54:24 +0000117
Martin v. Löwis33b64502008-10-15 05:58:17 +0000118- Issue #4072: Restore build_py_2to3.
119
Martin v. Löwisd8506df2008-10-06 15:19:21 +0000120- Issue #4014: Don't claim that Python has an Alpha release status, in addition
121 to claiming it is Mature.
122
Martin v. Löwis04dc25c2008-10-03 16:09:28 +0000123- Issue #3187: Add sys.setfilesystemencoding.
124
Guido van Rossumf0af3e32008-10-02 18:55:37 +0000125- Issue #3187: Better support for "undecodable" filenames. Code by Victor
126 Stinner, with small tweaks by GvR.
127
Martin v. Löwis601149b2008-09-29 22:19:08 +0000128- Issue #3965: Allow repeated calls to turtle.Screen, by making it a
129 true singleton object.
130
Benjamin Peterson3a53fbb2008-09-27 22:04:16 +0000131- Issue #3911: ftplib.FTP.makeport() could give invalid port numbers.
132
Amaury Forgeot d'Arcb5cf3012008-09-25 22:27:43 +0000133- Issue #3929: When the database cannot be opened, dbm.open() would incorrectly
134 raise a TypeError: "'tuple' object is not callable" instead of the expected
135 dbm.error.
136
Martin v. Löwis60ebb8b2008-09-21 07:32:10 +0000137- Bug #3884: Make the turtle module toplevel again.
138
Thomas Heller1308c262008-09-24 19:01:29 +0000139- Issue #3547: Fixed ctypes structures bitfields of varying integer
140 sizes.
141
Gerhard Häring6117f422008-09-22 06:04:51 +0000142Extension Modules
143-----------------
144
145- Issue #3659: Subclasses of str didn't work as SQL parameters.
146
Martin v. Löwisf63921f2008-10-13 11:30:30 +0000147Build
148-----
149
Martin v. Löwis900646e2008-11-06 17:30:03 +0000150- Issue #4120: Exclude manifest from extension modules in VS2008.
151
Martin v. Löwisc820eaf2008-10-17 13:47:20 +0000152- Issue #4091: Install pythonxy.dll in system32 again.
153
Martin v. Löwisf63921f2008-10-13 11:30:30 +0000154- Issue #4018: Disable "for me" installations on Vista.
155
Martin v. Löwisb37509b2008-11-04 20:45:29 +0000156- Issue #4204: Fixed module build errors on FreeBSD 4.
157
Martin v. Löwis33b64502008-10-15 05:58:17 +0000158Tools/Demos
159-----------
160
Martin v. Löwis869bad92008-10-17 15:54:44 +0000161- Issue #3717: Fix Demo/embed/demo.c.
162
Martin v. Löwis33b64502008-10-15 05:58:17 +0000163- Issue #4072: Add a distutils demo for build_py_2to3.
164
Barry Warsaw1ecaf2c2008-09-18 04:28:35 +0000165
Barry Warsaw8509df72008-08-21 03:02:47 +0000166What's New in Python 3.0 release candidate 1
167============================================
168
Barry Warsawb8854802008-09-18 03:00:28 +0000169*Release date: 17-Sep-2008*
Barry Warsaw8509df72008-08-21 03:02:47 +0000170
171Core and Builtins
172-----------------
173
Benjamin Peterson5e19e442008-09-10 21:47:03 +0000174- Issue #3827: memoryview lost its size attribute in favor of using len(view).
175
Hirokazu Yamamoto167b12b2008-09-09 14:01:25 +0000176- Issue #3813: could not lanch python.exe via symbolic link on cygwin.
177
Antoine Pitrou5651eaa2008-09-06 20:46:58 +0000178- Issue #3705: fix crash when given a non-ascii value on the command line for
Amaury Forgeot d'Arc8530e852008-09-09 07:28:22 +0000179 the "-c" and "-m" parameters. Now the behaviour is as expected under Linux,
180 although under Windows it fails at a later point.
Antoine Pitrou5651eaa2008-09-06 20:46:58 +0000181
Benjamin Peterson791dc2f2008-09-05 23:27:15 +0000182- Issue #3279: Importing site at interpreter was failing silently because the
183 site module uses the open builtin which was not initialized at the time.
184
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +0000185- Issue #3660: Corrected a reference leak in str.encode() when the encoder
186 does not return a bytes object.
187
188- Issue #3774: Added a few more checks in PyTokenizer_FindEncoding to handle
Amaury Forgeot d'Arc1b933ed2008-09-04 22:34:09 +0000189 error conditions.
190
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +0000191- Issue #3594: Fix Parser/tokenizer.c:fp_setreadl() to open the file being
Brett Cannon8a9583e2008-09-04 05:04:25 +0000192 tokenized by either a file path or file pointer for the benefit of
193 PyTokenizer_FindEncoding().
194
Antoine Pitroufff95302008-09-03 18:58:51 +0000195- Issue #3696: Error parsing arguments on OpenBSD <= 4.4 and Cygwin. On
196 these systems, the mbstowcs() function is slightly buggy and must be
197 replaced with strlen() for the purpose of counting of number of wide
198 characters needed to represent the multi-byte character string.
199
Antoine Pitrou658fad82008-09-03 18:34:34 +0000200- Issue #3697: "Fatal Python error: Cannot recover from stack overflow"
201 could be easily encountered under Windows in debug mode when exercising
202 the recursion limit checking code, due to bogus handling of recursion
203 limit when USE_STACKCHEK was enabled.
204
Brett Cannon54bd41d2008-09-02 04:01:42 +0000205- Issue 3639: The _warnings module could segfault the interpreter when
206 unexpected types were passed in as arguments.
207
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +0000208- Issue #3712: The memoryview object had a reference leak and didn't support
209 cyclic garbage collection.
210
Antoine Pitrouf71995782008-08-29 18:37:05 +0000211- Issue #3668: Fix a memory leak with the "s*" argument parser in
212 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
213 was correctly parsed but parsing of subsequent arguments failed.
214
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +0000215- Issue #3611: An exception __context__ could be cleared in a complex pattern
216 involving a __del__ method re-raising an exception.
217
Antoine Pitrouec569b72008-08-26 22:40:48 +0000218- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
219 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
220 mechanism. In the process, fix a bug where isinstance() and issubclass(),
221 when given a tuple of classes as second argument, were looking up
222 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
223 type object.
224
Antoine Pitroue2dffc02008-08-26 22:02:58 +0000225- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
226
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +0000227- Issue #3651: Fix various memory leaks when using the buffer
228 interface, or when the "s#" code of PyArg_ParseTuple is given a
229 bytes object.
230
Neal Norwitz6ae2eb22008-08-24 23:50:08 +0000231- Issue #3657: Fix uninitialized memory read when pickling longs.
232 Found by valgrind.
233
Neal Norwitz3ce5d922008-08-24 07:08:55 +0000234- Apply security patches from Apple.
235
Neal Norwitz2f99b242008-08-24 05:48:10 +0000236- Fix crashes on memory allocation failure found with failmalloc.
237
238- Fix memory leaks found with valgrind and update suppressions file.
239
240- Fix compiler warnings in opt mode which would lead to invalid memory reads.
241
242- Fix problem using wrong name in decimal module reported by pychecker.
243
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +0000244- Issue #3650: Fixed a reference leak in bytes.split('x').
245
Benjamin Petersonc15a0732008-08-26 16:46:47 +0000246- bytes(o) now tries to use o.__bytes__() before using fallbacks.
247
Gregory P. Smith207f2112008-09-07 06:29:10 +0000248- Issue #1204: The configure script now tests for additional libraries
249 that may be required when linking against readline. This fixes issues
250 with x86_64 builds on some platforms (a few Linux flavors and OpenBSD).
251
Benjamin Petersonc15a0732008-08-26 16:46:47 +0000252C API
253-----
254
255- PyObject_Bytes and PyBytes_FromObject were added.
256
Barry Warsaw8509df72008-08-21 03:02:47 +0000257Library
258-------
259
Guido van Rossum698280d2008-09-10 17:44:35 +0000260- Issue #3756: make re.escape() handle bytes as well as str.
261
Georg Brandl7cd67cc2008-09-09 19:31:25 +0000262- Issue #3800: fix filter() related bug in formatter.py.
263
Antoine Pitrou5fe291f2008-09-06 23:00:03 +0000264- Issue #874900: fix behaviour of threading module after a fork.
265
Antoine Pitrou9e4fdf42008-09-05 23:43:02 +0000266- Issue #3535: zipfile couldn't read some zip files larger than 2GB.
267
268- Issue #3776: Deprecate the bsddb package for removal in 3.0.
269
270- Issue #3762: platform.architecture() fails if python is lanched via
271 its symbolic link.
272
Antoine Pitroud79dc622008-09-05 00:03:33 +0000273- Issue #3660: fix a memory leak in the C accelerator of the pickle module.
274
Antoine Pitrou1d6a16b2008-09-04 21:32:09 +0000275- Issue #3160: the "bdist_wininst" distutils command didn't work.
276
Guilherme Polob212b752008-09-04 11:21:31 +0000277- Issue #1658: tkinter changes dict size during iteration in both
278 tkinter.BaseWidget and tkinter.scrolledtext.ScrolledText.
279
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000280- The bsddb module (and therefore the dbm.bsd module) has been removed.
Gregory P. Smith451e99b2008-09-04 04:46:48 +0000281 It is now maintained outside of the standard library at
282 http://www.jcea.es/programacion/pybsddb.htm.
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000283
Facundo Batistac469d4c2008-09-03 22:49:01 +0000284- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
285 to the urlparse one. Added a DeprecationWarning in the old module, it
286 will be deprecated in the future.
287
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +0000288- Issue #3719: platform.architecture() fails if there are spaces in the
289 path to the Python binary.
290
Brett Cannonec92e182008-09-02 02:46:59 +0000291- Issue 3602: As part of the merge of r66135, make the parameters on
292 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
293
Benjamin Petersonb3085c92008-09-01 23:09:31 +0000294- The deprecation warnings for the camelCase threading API names were removed.
295
Jesse Noller338f5782008-09-03 18:22:19 +0000296- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
297 SEM_VALUE_MAX.
298
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000299Extension Modules
300-----------------
301
Antoine Pitrou9cadb1b2008-09-15 23:02:56 +0000302- Issue #3782: os.write() must not accept unicode strings.
303
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +0000304- Issue #2975: When compiling several extension modules with Visual Studio 2008
305 from the same python interpreter, some environment variables would grow
306 without limit.
307
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000308- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
309 exploitation of poor argument checking.
310
Jesus Cea6ba33292008-08-31 14:12:11 +0000311- bsddb code updated to version 4.7.3pre2. This code is the same than
312 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
313 The Python code is automatically translated using "2to3". Please, do not
314 update this code in Python 3.0 by hand. Update the 2.6 one and then
315 do "2to3".
316
Benjamin Peterson791dc2f2008-09-05 23:27:15 +0000317- The _bytesio and _stringio modules are now compiled into the python binary.
318
Gregory P. Smith693fc462008-09-06 20:13:06 +0000319- Issue #3492 and #3790: Fixed the zlib module and zipimport module uses of
320 mutable bytearray objects where they should have been using immutable bytes.
321
Gregory P. Smith0a608fd2008-09-06 21:34:51 +0000322- Issue #3797: Fixed the dbm, marshal, mmap, ossaudiodev, & winreg modules to
323 return bytes objects instead of bytearray objects.
324
Gregory P. Smith693fc462008-09-06 20:13:06 +0000325
Neal Norwitz8f2f22a2008-08-24 20:59:23 +0000326Tools/Demos
327-----------
328
329- Fix Misc/gdbinit so it works.
330
Barry Warsaw8509df72008-08-21 03:02:47 +0000331
Amaury Forgeot d'Arcf7bfcfb2008-09-09 06:42:00 +0000332Build
333-----
334
Hirokazu Yamamoto54a1cc62008-09-09 17:55:11 +0000335- Issue #3812: Failed to build python if configure --without-threads.
336
Amaury Forgeot d'Arcf7bfcfb2008-09-09 06:42:00 +0000337- Issue #3791: Remove the bsddb module from the Windows installer, and the
338 core bsddb library from the Windows build files.
339
340
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000341What's new in Python 3.0b3?
342===========================
343
Barry Warsaw57c10582008-08-21 02:39:51 +0000344*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000345
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000346Core and Builtins
347-----------------
348
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000349- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
350 arguments.
351
Antoine Pitrou616d2852008-08-19 22:09:34 +0000352- Issue #2394: implement more of the memoryview API, with the caveat that
353 only one-dimensional contiguous buffers are supported and exercised right
354 now. Slicing, slice assignment and comparison (equality and inequality)
355 have been added. Also, the tolist() method has been implemented, but only
356 for byte buffers. Endly, the API has been updated to return bytes objects
357 wherever it used to return bytearrays.
358
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000359- Issue #3560: clean up the new C PyMemoryView API so that naming is
360 internally consistent; add macros PyMemoryView_GET_BASE() and
361 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
362 without relying on a particular implementation; remove the ill-named
363 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
364
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000365- ctypes function pointers that are COM methods have a boolean True
366 value again.
367
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000368- Issue #1819: function calls with several named parameters are now on
369 average 35% faster (as measured by pybench).
370
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000371- The undocumented C APIs PyUnicode_AsString() and
372 PyUnicode_AsStringAndSize() were made private to the interpreter, in
373 order to be able to refine their interfaces for Python 3.1.
374
375 If you need to access the UTF-8 representation of a Unicode object
376 as bytes string, please use PyUnicode_AsUTF8String() instead.
377
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000378- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
379 to Python 3.0's stricter semantics which allow to avoid successive
380 reallocations of the result string (this also affects str.join()).
381
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000382
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000383Library
384-------
385
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000386- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
387 a build problem on MacOS with CJK locales. It adds four temporary
388 mappings to existing legacy codecs that are virtually compatible
389 with Mac encodings. They will be replaced by codecs correctly
390 implemented in 3.1.
391
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000392- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
393 "global name 'header' is not defined".
394
Antoine Pitroufd036452008-08-19 17:56:33 +0000395- Issue #2834: update the regular expression library to match the unicode
396 standards of py3k. In other words, mixing bytes and unicode strings
397 (be it as pattern, search string or replacement string) raises a TypeError.
398 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
399 and can be disabled by specifying a new re.ASCII flag; as for bytes
400 patterns, ASCII matching is the only option and trying to specify re.UNICODE
401 for such patterns raises a ValueError.
402
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000403- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
404 Code contributed by Matt Giuca. quote() now encodes the input
405 before quoting, unquote() decodes after unquoting. There are
406 new arguments to change the encoding and errors settings.
407 There are also new APIs to skip the encode/decode steps.
408 [un]quote_plus() are also affected.
409
Nick Coghlan36f49522008-08-18 12:31:52 +0000410- Issue #2235: numbers.Number now blocks inheritance of the default id()
411 based hash because that hash mechanism is not correct for numeric types.
412 All concrete numeric types that inherit from Number (rather than just
413 registering with it) must explicitly provide a hash implementation in
414 order for their instances to be hashable.
415
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000416- Issue #2676: in the email package, content-type parsing was hanging on
417 pathological input because of quadratic or exponential behaviour of a
418 regular expression.
419
Antoine Pitrou87695762008-08-14 22:44:29 +0000420- Issue #3476: binary buffered reading through the new "io" library is now
421 thread-safe.
422
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000423- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
424 menu entries were not deleted.
425
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000426- Remove the TarFileCompat class from tarfile.py.
427
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000428- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
429 accepts the same parameters. It just checks that its first argument is an
430 integer.
431
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000432- Issue #3394: zipfile.writestr sets external attributes when passed a
433 file name rather than a ZipInfo instance, so files are extracted with
434 mode 0600 rather than 000 under Unix.
435
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000436- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
437 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000438
Martin v. Löwis371bb502008-08-16 13:02:57 +0000439Extension Modules
440-----------------
441
442- Bug #3542: Support Unicode strings in _msi module.
443
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000444What's new in Python 3.0b2?
445===========================
446
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000447*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000448
449Core and Builtins
450-----------------
451
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000452- Issue #3008: the float type has a new instance method 'float.hex'
453 and a new class method 'float.fromhex' to convert floating-point
454 numbers to and from hexadecimal strings, respectively.
455
Eric Smithd68af8f2008-07-16 00:15:35 +0000456- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
457 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
458
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000459- Issue #3280: like chr(), the "%c" format now accepts unicode code points
460 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
461 "narrow Unicode" builds, the result is a string of 2 code units, forming a
462 UTF-16 surrogate pair.
463
Georg Brandld52429f2008-07-04 15:55:02 +0000464- Issue #3282: str.isprintable() should return False for undefined
465 Unicode characters.
466
Martin v. Löwis029656f2008-06-30 04:06:08 +0000467- Issue #3236: Return small longs from PyLong_FromString.
468
Benjamin Petersone6528212008-07-15 15:32:09 +0000469- Exception tracebacks now support exception chaining.
470
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000471Library
472-------
473
Brett Cannonc2542e92008-07-25 18:19:20 +0000474- Removed the sunaudio module. Use sunau instead.
475
Thomas Heller47bc8092008-08-19 06:38:12 +0000476- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
477 api functions without holding the GIL, which could lead to a fatal
478 error when they failed.
479
480- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
481
Georg Brandl30704ea02008-07-23 15:07:12 +0000482- Removed "ast" function aliases from the parser module.
483
Thomas Heller15383a02008-07-15 19:46:52 +0000484- Issue #3313: Fixed a crash when a failed dlopen() call does not set
485 a valid dlerror() message.
486
Thomas Heller0261e1e2008-07-15 17:25:07 +0000487- Issue #3258: Fixed a crash when a ctypes POINTER type to an
488 incomplete structure was created.
489
Georg Brandl1abcbf82008-07-01 19:28:43 +0000490- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
491 argument now must be a bytes object in any case.
492
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000493- Issue #3145: help("modules whatever") failed when trying to load the source
494 code of every single module of the standard library, including invalid files
495 used in the test suite.
496
Georg Brandlbded4d32008-07-17 18:15:35 +0000497- The gettext library now consistently uses Unicode strings for message ids
498 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000499
Benjamin Petersone6528212008-07-15 15:32:09 +0000500- The traceback module has been expanded to handle chained exceptions.
501
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000502C API
503-----
504
505- Issue #3247: the function Py_FindMethod was removed. Modern types should
506 use the tp_methods slot instead.
507
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000508Tools/Demos
509-----------
510
Georg Brandl336341f2008-07-01 20:21:28 +0000511- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000512
Georg Brandl336341f2008-07-01 20:21:28 +0000513- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000514
515
Brett Cannon0d71ee72008-05-08 18:13:40 +0000516What's new in Python 3.0b1?
517===========================
518
Barry Warsawc1e689e2008-06-19 00:35:43 +0000519*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000520
521Core and Builtins
522-----------------
523
Brett Cannondb734912008-06-27 00:52:15 +0000524- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
525 argument being anything other than a dict or None. Also fixed a bug in error
526 handling when 'message' and 'category' were both set to None, triggering a
527 bus error.
528
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000529- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
530 holds the last (strong) reference to its referent.
531
Georg Brandl559e5d72008-06-11 18:37:52 +0000532- Issue #2630: implement PEP 3138. repr() now returns printable
533 Unicode characters unescaped, to get an ASCII-only representation
534 of an object use ascii().
535
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000536- Issue #1342: On windows, Python could not start when installed in a
537 directory with non-ascii characters.
538
Martin v. Löwis1a214512008-06-11 05:26:20 +0000539- Implement PEP 3121: new module initialization and finalization API.
540
Georg Brandle1b5ac62008-06-04 13:06:58 +0000541- Removed the already-defunct ``-t`` option.
542
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000543- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
544 unmarshalling many code objects, which happens when importing a
545 large .pyc file (~1000 functions).
546
Georg Brandl52b92cc2008-05-25 09:43:03 +0000547- Issue #2963: fix merging oversight that disabled method cache for
548 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000549
Georg Brandlc9b09532008-05-25 09:24:38 +0000550- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
551
Georg Brandl52b92cc2008-05-25 09:43:03 +0000552- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000553
Georg Brandl52b92cc2008-05-25 09:43:03 +0000554- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
555 code now allows any unicode string and returns a utf-8 encoded
556 buffer, just like the "s#" code already does. The "z" code was
557 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000558
Georg Brandl52b92cc2008-05-25 09:43:03 +0000559- Issue #2863: generators now have a ``gen.__name__`` attribute that
560 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
561 ``func.func_code.co_name``. The repr() of a generator now also
562 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000563
564- Issue #2831: enumerate() now has a ``start`` argument.
565
Georg Brandl52b92cc2008-05-25 09:43:03 +0000566- Issue #2801: fix bug in the float.is_integer method where a
567 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000568
Georg Brandl52b92cc2008-05-25 09:43:03 +0000569- The ``--with-toolbox-glue`` option (and the associated
570 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000571
Georg Brandl52b92cc2008-05-25 09:43:03 +0000572- Issue #2196: hasattr() now lets exceptions which do not inherit
573 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
574 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000575
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000576- #3021 Exception reraising sematics have been significantly improved. However,
577 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
578 code anymore.
579
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000580- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
581 removed.
582
Brett Cannon0d71ee72008-05-08 18:13:40 +0000583Extension Modules
584-----------------
585
Georg Brandl38feaf02008-05-25 07:45:51 +0000586- Renamed ``_winreg`` module to ``winreg``.
587
Georg Brandl52b92cc2008-05-25 09:43:03 +0000588- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
589 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000590
591- Support for Windows 9x has been removed from the winsound module.
592
Georg Brandl52b92cc2008-05-25 09:43:03 +0000593- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000594
Brett Cannon0d71ee72008-05-08 18:13:40 +0000595Library
596-------
597
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000598- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
599 symtable.Symbol have been removed.
600
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000601- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
602
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000603- a new ``urllib`` package was created. It consists of code from
604 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
605 modules have all been removed. The new package has five submodules:
606 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
607 ``urllib.error``, and ``urllib.robotparser``. The
608 ``urllib.request.urlopen()`` function uses the url opener from
609 ``urllib2``. (Note that the unittests have not been renamed for the
610 beta, but they will be renamed in the future.)
611
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000612- rfc822 has been removed in favor of the email package.
613
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000614- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000615
Barry Warsawf5019422008-06-12 02:42:00 +0000616- Patch #2849: Remove use of rfc822 module from standard library.
617
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000618- Added C optimized implementation of io.StringIO.
619
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000620- The ``pickle`` module is now automatically use an optimized C
621 implementation of Pickler and Unpickler when available. The
622 ``cPickle`` module is no longer needed.
623
Georg Brandl877b10a2008-06-01 21:25:55 +0000624- Removed the ``htmllib`` and ``sgmllib`` modules.
625
Georg Brandl61013952008-05-28 15:56:30 +0000626- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
627 been removed from ``http.cookies``.
628
Brett Cannona23810f2008-05-26 19:04:21 +0000629- The ``commands`` module has been removed. Its getoutput() and
630 getstatusoutput() functions have been moved to the ``subprocess`` module.
631
Georg Brandl3d5c4252008-05-26 18:03:26 +0000632- The ``http`` package was created; it contains the old ``httplib``
633 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
634 as ``http.cookiejar``, and the content of the three ``HTTPServer``
635 modules as ``http.server``.
636
Georg Brandl38eceaa2008-05-26 11:14:17 +0000637- The ``xmlrpc`` package was created; it contains the old
638 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
639 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000640 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000641
642- The ``dbm`` package was created, containing the old modules
643 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
644 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
645 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
646 as submodules.
647
Georg Brandl52b92cc2008-05-25 09:43:03 +0000648- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000649
Georg Brandl52b92cc2008-05-25 09:43:03 +0000650- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000651
Georg Brandl52b92cc2008-05-25 09:43:03 +0000652- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000653
Georg Brandl52b92cc2008-05-25 09:43:03 +0000654- Issue #2250: Exceptions raised during evaluation of names in
655 rlcompleter's ``Completer.complete()`` method are now caught and
656 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000657
Georg Brandl52b92cc2008-05-25 09:43:03 +0000658- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
659 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000660
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000661- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
662 large to fit in a C long. ldexp(x, n) now returns a zero (with
663 suitable sign) if n is large and negative; previously, it raised
664 OverflowError.
665
Georg Brandl52b92cc2008-05-25 09:43:03 +0000666- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000667
Georg Brandl52b92cc2008-05-25 09:43:03 +0000668- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000669
Georg Brandl52b92cc2008-05-25 09:43:03 +0000670- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000671
Georg Brandl52b92cc2008-05-25 09:43:03 +0000672- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000673
Georg Brandl52b92cc2008-05-25 09:43:03 +0000674- Fixed the ``__all__`` setting on ``collections`` to include
675 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000676
Brett Cannoncf3520c2008-05-11 22:47:58 +0000677- The sre module has been removed.
678
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000679- The Queue module has been renamed to queue.
680
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000681- The copy_reg module has been renamed to copyreg.
682
Brett Cannond8b61ee2008-05-11 03:00:26 +0000683- The mhlib module has been removed.
684
Brett Cannonbd474422008-05-10 22:42:14 +0000685- The ihooks module has been removed.
686
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000687- The fpformat module has been removed.
688
Brett Cannonf4fd9932008-05-10 21:11:46 +0000689- The dircache module has been removed.
690
Brett Cannond175b4c2008-05-10 03:19:54 +0000691- The Canvas module has been removed.
692
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000693- The Decimal module gained the magic methods __round__, __ceil__,
694 __floor__ and __trunc__, to give support for round, math.ceil,
695 math.floor and math.trunc.
696
Brett Cannon900ee3a2008-05-08 20:31:11 +0000697- The user module has been removed.
698
Brett Cannon34afe872008-05-08 20:31:44 +0000699- The mutex module has been removed.
700
Brett Cannon0d71ee72008-05-08 18:13:40 +0000701- The imputil module has been removed.
702
Georg Brandl52b92cc2008-05-25 09:43:03 +0000703- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000704
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000705- pdb gained the "until" command.
706
Georg Brandl52b92cc2008-05-25 09:43:03 +0000707- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000708
Georg Brandl32de7af2008-08-18 23:07:41 +0000709- The threading module API was renamed to be PEP 8 compliant. The
710 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000711
Georg Brandl294d5a92008-06-01 19:25:32 +0000712Tools/Demos
713-----------
714
715- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000716
Brett Cannon0d71ee72008-05-08 18:13:40 +0000717Build
718-----
719
720
Barry Warsaw66079cd2008-04-04 01:36:36 +0000721What's New in Python 3.0a5?
722===========================
723
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000724*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000725
726Core and Builtins
727-----------------
728
Georg Brandl52b92cc2008-05-25 09:43:03 +0000729- Fixed misbehaviour of PyLong_FromSsize_t on systems where
730 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000731
Georg Brandl52b92cc2008-05-25 09:43:03 +0000732- Issue #2221: Corrected a SystemError "error return without exception
733 set", when the code executed by exec() raises an exception, and
734 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000735
Georg Brandl52b92cc2008-05-25 09:43:03 +0000736- Bug #2565: The repr() of type objects now calls them 'class', not
737 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000738
Martin v. Löwis790465f2008-04-05 20:41:37 +0000739- The command line processing was converted to pass Unicode strings
740 through as unmodified as possible; as a consequence, the C API
741 related to command line arguments was changed to use wchar_t.
742
Georg Brandl52b92cc2008-05-25 09:43:03 +0000743- All backslashes in raw strings are interpreted literally. This
744 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000745
Barry Warsaw66079cd2008-04-04 01:36:36 +0000746Extension Modules
747-----------------
748
749Library
750-------
751
Georg Brandl52b92cc2008-05-25 09:43:03 +0000752- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000753
Thomas Hellere106dc32008-04-24 18:39:36 +0000754- Issue #2682: ctypes callback functions now longer contain a cyclic
755 reference to themselves.
756
Georg Brandl52b92cc2008-05-25 09:43:03 +0000757- Issue #2058: Remove the buf attribute and add __slots__ to the
758 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000759
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000760- Bug #2606: Avoid calling .sort() on a dict_keys object.
761
Thomas Hellerbff533b2008-04-04 19:53:14 +0000762- The bundled libffi copy is now in sync with the recently released
763 libffi3.0.5 version, apart from some small changes to
764 Modules/_ctypes/libffi/configure.ac.
765
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000766Build
767-----
768
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000769- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
770
Guido van Rossumdc21db32008-04-07 18:37:41 +0000771- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000772 accidentally overwriting a Python 2.x installation. Use "make
773 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000774
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000775- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
776 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000777
Georg Brandl52b92cc2008-05-25 09:43:03 +0000778
Barry Warsawa9d499d2008-03-01 18:38:07 +0000779What's New in Python 3.0a4?
780===========================
781
Barry Warsawbb5cd082008-04-02 23:33:27 +0000782*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000783
Martin v. Löwis25931462008-03-17 20:43:42 +0000784Core and Builtins
785-----------------
786
787- Bug #2301: Don't try decoding the source code into the original
788 encoding for syntax errors.
789
Martin v. Löwis92fab752008-03-08 10:40:41 +0000790Extension Modules
791-----------------
792
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000793- The dl module was removed, use the ctypes module instead.
794
Martin v. Löwis92fab752008-03-08 10:40:41 +0000795- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000796
Martin v. Löwis071ef772008-03-08 11:24:24 +0000797Library
798-------
799
Georg Brandl52b92cc2008-05-25 09:43:03 +0000800- The class distutils.commands.build_py.build_py_2to3 can be used as a
801 build_py replacement to automatically run 2to3 on modules that are
802 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000803
Guido van Rossumf4169812008-03-17 22:56:06 +0000804- A new pickle protocol (protocol 3) is added with explicit support
805 for bytes. This is the default protocol. It intentionally cannot
806 be unpickled by Python 2.x.
807
808- When a pickle written by Python 2.x contains an (8-bit) str
809 instance, this is now decoded to a (Unicode) str instance. The
810 encoding used to do this defaults to ASCII, but can be overridden
811 via two new keyword arguments to the Unpickler class. Previously
812 this would create bytes instances, which is usually wrong: str
813 instances are often used to pickle attribute names etc., and text is
814 more common than binary data anyway.
815
Martin v. Löwis071ef772008-03-08 11:24:24 +0000816- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000817 system doesn't support CODESET and LANG isn't set or doesn't allow
818 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000819
Georg Brandl52b92cc2008-05-25 09:43:03 +0000820- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
821 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000822
Georg Brandl52b92cc2008-05-25 09:43:03 +0000823- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
824 has been renamed tokenize and now works with bytes rather than
825 strings. A new detect_encoding function has been added for
826 determining source file encoding according to PEP-0263. Token
827 sequences returned by tokenize always start with an ENCODING token
828 which specifies the encoding used to decode the file. This token is
829 used to encode the output of untokenize back to bytes.
830
Barry Warsawa9d499d2008-03-01 18:38:07 +0000831
Christian Heimesbc873412007-12-08 22:11:32 +0000832What's New in Python 3.0a3?
833===========================
834
Barry Warsaw659fc422008-03-01 17:45:23 +0000835*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000836
837Core and Builtins
838-----------------
839
Georg Brandl52b92cc2008-05-25 09:43:03 +0000840- Issue #2282: io.TextIOWrapper was not overriding seekable() from
841 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000842
Georg Brandl52b92cc2008-05-25 09:43:03 +0000843- Issue #2115: Important speedup in setting __slot__ attributes. Also
844 prevent a possible crash: an Abstract Base Class would try to access
845 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000846
Georg Brandl52b92cc2008-05-25 09:43:03 +0000847- Fixed repr() and str() of complex numbers with infinity or nan as
848 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000849
Georg Brandl52b92cc2008-05-25 09:43:03 +0000850- Clear all free list during a gc.collect() of the highest generation
851 in order to allow pymalloc to free more arenas. Python may give back
852 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000853
Georg Brandl52b92cc2008-05-25 09:43:03 +0000854- Issue #2045: Fix an infinite recursion triggered when printing a
855 subclass of collections.defaultdict, if its default_factory is set
856 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000857
858- Fixed a minor memory leak in dictobject.c. The content of the free
859 list was not freed on interpreter shutdown.
860
Georg Brandl52b92cc2008-05-25 09:43:03 +0000861- Limit free list of method and builtin function objects to 256
862 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000863
Georg Brandl52b92cc2008-05-25 09:43:03 +0000864- Patch #1953: Added ``sys._compact_freelists()`` and the C API
865 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000866 to compact the internal free lists of pre-allocted ints and floats.
867
868- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000869 Python expected the return type int but the fork familie returns
870 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000871
Georg Brandl52b92cc2008-05-25 09:43:03 +0000872- Issue #1678380: Fix a bug that identifies 0j and -0j when they
873 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000874
Georg Brandl52b92cc2008-05-25 09:43:03 +0000875- Issue #2025: Added tuple.count() and tuple.index() methods to comply
876 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000877
Georg Brandl52b92cc2008-05-25 09:43:03 +0000878- Fixed multiple reinitialization of the Python interpreter. The small
879 int list in longobject.c has caused a seg fault during the third
880 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000881
Georg Brandl52b92cc2008-05-25 09:43:03 +0000882- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000883
Georg Brandl52b92cc2008-05-25 09:43:03 +0000884- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000885
Georg Brandl52b92cc2008-05-25 09:43:03 +0000886- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000887
Georg Brandl52b92cc2008-05-25 09:43:03 +0000888- map() no longer accepts None for the first argument. Use zip()
889 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000890
Facundo Batista2336bdd2008-01-19 19:12:01 +0000891- Issue #1769: Now int("- 1") is not allowed any more.
892
Georg Brandl52b92cc2008-05-25 09:43:03 +0000893- Object/longobject.c: long(float('nan')) raises an OverflowError
894 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000895
Georg Brandl52b92cc2008-05-25 09:43:03 +0000896- Issue #1762972: __file__ points to the source file instead of the
897 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000898
Guido van Rossumab078dd2008-01-06 00:09:11 +0000899- Issue #1393: object_richcompare() returns NotImplemented instead of
900 False if the objects aren't equal, to give the other side a chance.
901
Guido van Rossume239b002008-01-06 00:44:20 +0000902- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000903
Georg Brandl52b92cc2008-05-25 09:43:03 +0000904- Improve some exception messages when Windows fails to load an
905 extension module. Now we get for example '%1 is not a valid Win32
906 application' instead of 'error code 193'. Also use Unicode strings
907 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000908
Georg Brandl52b92cc2008-05-25 09:43:03 +0000909- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
910 Python C API has gained a new type *PyInstanceMethod_Type* and the
911 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
912 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000913
Georg Brandl52b92cc2008-05-25 09:43:03 +0000914- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
915 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
916 are now enough to print the corresponding list of objects considered
917 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000918
Georg Brandl52b92cc2008-05-25 09:43:03 +0000919- Issue #1573: Improper use of the keyword-only syntax makes the
920 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000921
Georg Brandl52b92cc2008-05-25 09:43:03 +0000922- Issue #1564: The set implementation should special-case PyUnicode
923 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000924
Guido van Rossumea6775b2008-02-21 20:16:31 +0000925- Patch #1031213: Decode source line in SyntaxErrors back to its
926 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000927
Christian Heimes09aaa882008-02-23 15:01:06 +0000928- inspect.getsource() includes the decorators again.
929
Guido van Rossumea6775b2008-02-21 20:16:31 +0000930- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
931 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000932
Georg Brandl52b92cc2008-05-25 09:43:03 +0000933- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
934 the first chunk fed to the decoder started with a BOM, but was
935 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000936
Christian Heimesbc873412007-12-08 22:11:32 +0000937Extension Modules
938-----------------
939
Georg Brandl52b92cc2008-05-25 09:43:03 +0000940- Code for itertools ifilter(), imap(), and izip() moved to bultins
941 and renamed to filter(), map(), and zip(). Also, renamed
942 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000943
Georg Brandl52b92cc2008-05-25 09:43:03 +0000944- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000945
Georg Brandl52b92cc2008-05-25 09:43:03 +0000946- Bug #2111: mmap segfaults when trying to write a block opened with
947 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000948
Georg Brandl52b92cc2008-05-25 09:43:03 +0000949- Issue #2063: correct order of utime and stime in os.times() result
950 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000951
Christian Heimesbc873412007-12-08 22:11:32 +0000952Library
953-------
954
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000955- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000956
Georg Brandl52b92cc2008-05-25 09:43:03 +0000957- Created new UserDict class in collections module. This one inherits
958 from and complies with the MutableMapping ABC. Also, moved
959 UserString and UserList to the collections module. The
960 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000961
Guido van Rossumea6775b2008-02-21 20:16:31 +0000962- Removed UserDict.DictMixin. Replaced all its uses with
963 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000964
Guido van Rossume239b002008-01-06 00:44:20 +0000965- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000966
Guido van Rossume239b002008-01-06 00:44:20 +0000967- Issue #1585: IDLE uses non-existent xrange() function.
968
969- Issue #1578: Problems in win_getpass.
970
Georg Brandl52d168a2008-01-07 18:10:24 +0000971Build
972-----
973
Georg Brandl52b92cc2008-05-25 09:43:03 +0000974- Renamed --enable-unicode configure flag to --with-wide-unicode,
975 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000976
Guido van Rossume239b002008-01-06 00:44:20 +0000977C API
978-----
979
980- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
981 Py_TYPE and Py_REFCNT.
982
Georg Brandl52b92cc2008-05-25 09:43:03 +0000983- New API PyImport_ImportModuleNoBlock(), works like
984 PyImport_ImportModule() but won't block on the import lock
985 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000986
Christian Heimesbc873412007-12-08 22:11:32 +0000987
Fred Drake0e474a82007-10-11 18:01:43 +0000988What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000989===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000990
Guido van Rossum99533a92007-12-06 05:07:41 +0000991*Release date: 07-Dec-2007*
992
993(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000994
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000995Core and Builtins
996-----------------
997
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000998- str8 now has the same construction signature as bytes.
999
Georg Brandl52b92cc2008-05-25 09:43:03 +00001000- Comparisons between str and str8 now return False/True for ==/!=.
1001 sqlite3 returns str8 when recreating on object from it's __conform__
1002 value. The struct module returns str8 for all string-related
1003 formats. This was true before this change, but becomes more
1004 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +00001005
Georg Brandl52b92cc2008-05-25 09:43:03 +00001006- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
1007 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +00001008
1009- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
1010
1011- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +00001012 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +00001013 `PyUnicode_DecodeFSDefault(char*)` was added.
1014
Georg Brandl52b92cc2008-05-25 09:43:03 +00001015- io.open() and _fileio.FileIO have grown a new argument closefd. A
1016 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +00001017
Georg Brandl52b92cc2008-05-25 09:43:03 +00001018- Added a new option -b to issues warnings (-bb for errors) about
1019 certain operations between bytes/buffer and str like str(b'') and
1020 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +00001021
Georg Brandl52b92cc2008-05-25 09:43:03 +00001022- The standards streams sys.stdin, stdout and stderr may be None when
1023 the when the C runtime library returns an invalid file descriptor
1024 for the streams (fileno(stdin) < 0). For now this happens only for
1025 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +00001026
Christian Heimesbce52be2007-11-17 19:08:41 +00001027- Added PCbuild9 directory for VS 2008.
1028
Georg Brandl52b92cc2008-05-25 09:43:03 +00001029- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
1030 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +00001031
Georg Brandl52b92cc2008-05-25 09:43:03 +00001032- Unbound methods are gone for good. ClassObject.method returns an
1033 ordinary function object, instance.method still returns a bound
1034 method object. The API of bound methods is cleaned up, too. The
1035 im_class attribute is removed and im_func + im_self are renamed to
1036 __func__ and __self__. The factory PyMethod_New takes only func and
1037 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +00001038
Georg Brandl52b92cc2008-05-25 09:43:03 +00001039- intobject.h is no longer included by Python.h. The remains were
1040 moved to longobject.h. It still exists to define several aliases
1041 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +00001042
Christian Heimesa37d4c62007-12-04 23:02:19 +00001043- Removed sys.maxint, use sys.maxsize instead.
1044
Fred Drake0e474a82007-10-11 18:01:43 +00001045Extension Modules
1046-----------------
1047
1048- The `hotshot` profiler has been removed; use `cProfile` instead.
1049
Brett Cannone9fd2312007-10-12 19:18:19 +00001050Library
1051-------
1052
Georg Brandl52b92cc2008-05-25 09:43:03 +00001053- When loading an external file using testfile(), the passed-in
1054 encoding argument was being ignored if __loader__ is defined and
1055 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +00001056
Georg Brandl52b92cc2008-05-25 09:43:03 +00001057- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
1058 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +00001059
Christian Heimesc9543e42007-11-28 08:28:28 +00001060- Removed the 'new' module.
1061
Georg Brandl52b92cc2008-05-25 09:43:03 +00001062- Removed all types from the 'types' module that are easily accessable
1063 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +00001064
Georg Brandl52d168a2008-01-07 18:10:24 +00001065
Guido van Rossum4405cf32007-08-30 17:16:55 +00001066What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +00001067==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +00001068
Guido van Rossum4405cf32007-08-30 17:16:55 +00001069*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +00001070
1071Core and Builtins
1072-----------------
1073
Martin v. Löwis47383402007-08-15 07:32:56 +00001074- PEP 3131: Support non-ASCII identifiers.
1075
Martin v. Löwis447d33e2007-07-29 18:10:01 +00001076- PEP 3120: Change default encoding to UTF-8.
1077
Martin v. Löwis9f2e3462007-07-21 17:22:18 +00001078- PEP 3123: Use proper C inheritance for PyObject.
1079
Guido van Rossumcd16bf62007-06-13 18:07:49 +00001080- Removed the __oct__ and __hex__ special methods and added a bin()
1081 builtin function.
1082
Georg Brandl52b92cc2008-05-25 09:43:03 +00001083- PEP 3127: octal literals now start with "0o". Old-style octal
1084 literals are invalid. There are binary literals with a prefix of
1085 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +00001086
Guido van Rossume7ba4952007-06-06 23:52:48 +00001087- None, True, False are now keywords.
1088
Guido van Rossum29478ef2007-05-29 00:39:44 +00001089- PEP 3119: isinstance() and issubclass() can be overridden.
1090
Guido van Rossumebe3e162007-05-17 18:20:34 +00001091- Remove BaseException.message.
1092
Guido van Rossum1bc535d2007-05-15 18:46:22 +00001093- Remove tuple parameter unpacking (PEP 3113).
1094
Georg Brandl52b92cc2008-05-25 09:43:03 +00001095- Remove the f_restricted attribute from frames. This naturally leads
1096 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +00001097
Georg Brandl52b92cc2008-05-25 09:43:03 +00001098- PEP 3132 was accepted. That means that you can do ``a, *b =
1099 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +00001100
Georg Brandl52b92cc2008-05-25 09:43:03 +00001101- range() now returns an iterator rather than a list. Floats are not
1102 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +00001103
Nick Coghlan650f0d02007-04-15 12:05:43 +00001104- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +00001105 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +00001106
Guido van Rossume27dc722007-03-27 22:37:34 +00001107- By default, != returns the opposite of ==, unless the latter returns
1108 NotImplemented.
1109
Georg Brandl52b92cc2008-05-25 09:43:03 +00001110- Patch #1680961: sys.exitfunc has been removed and replaced with a
1111 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +00001112
Georg Brandl801dd732007-03-18 20:18:31 +00001113- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +00001114 keyword arg in the class statement, which can now use the full
1115 syntax of a parameter list. Also, the metaclass can implement a
1116 __prepare__ function which will be called to create the dictionary
1117 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +00001118
Georg Brandl428f0642007-03-18 18:35:15 +00001119- The long-deprecated argument "pend" of PyFloat_FromString() has been
1120 removed.
1121
Georg Brandle32b4222007-03-10 22:13:27 +00001122- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +00001123 its argument, if it exists. If not, it will work like before. This
1124 allows customizing the output of dir() in the presence of a
1125 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +00001126
Neal Norwitz8dfc4a92007-08-11 06:39:53 +00001127- Removed support for __members__ and __methods__.
1128
Georg Brandle32b4222007-03-10 22:13:27 +00001129- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +00001130
Georg Brandle32b4222007-03-10 22:13:27 +00001131- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +00001132 functionality formerly known as raw_input(); the name raw_input() is
1133 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +00001134
Georg Brandl52b92cc2008-05-25 09:43:03 +00001135- Classes listed in an 'except' clause must inherit from
1136 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +00001137
Guido van Rossumcc2b0162007-02-11 06:12:03 +00001138- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +00001139 and .keys(), .items(), .values() return dict views, which behave
1140 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +00001141
Guido van Rossum8b545362007-02-09 23:52:14 +00001142- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +00001143 'softspace' attribute of files is now gone (since print() doesn't
1144 use it). A side effect of this change is that you can get
1145 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +00001146
1147 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +00001148 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +00001149
1150 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +00001151
Brett Cannon398db8b2007-01-29 23:44:37 +00001152- PEP 3102: keyword-only arguments.
1153
Georg Brandl52b92cc2008-05-25 09:43:03 +00001154- Int/Long unification is complete. The 'long' built-in type and
1155 literals with trailing 'L' or 'l' have been removed. Performance
1156 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +00001157
1158- 'except E, V' must now be spelled as 'except E as V' and deletes V
1159 at the end of the except clause; V must be a simple name.
1160
Neal Norwitzc1505362006-12-28 06:47:50 +00001161- Added function annotations per PEP 3107.
1162
Georg Brandl52b92cc2008-05-25 09:43:03 +00001163- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +00001164
1165 >>> def f(x):
1166 ... def inc():
1167 ... nonlocal x
1168 ... x += 1
1169 ... return x
1170 ... return inc
1171 ...
1172 >>> inc = f(0)
1173 >>> inc()
1174 1
1175 >>> inc()
1176 2
1177
Georg Brandl66a796e2006-12-19 20:50:34 +00001178- Moved intern() to sys.intern().
1179
1180- exec is now a function.
1181
1182- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +00001183
Neal Norwitz4886cc32006-08-21 17:06:07 +00001184- Classic classes are a thing of the past. All classes are new style.
1185
1186- Exceptions *must* derive from BaseException.
1187
1188- Integer division always returns a float. The -Q option is no more.
1189 All the following are gone:
1190 * PyNumber_Divide and PyNumber_InPlaceDivide
1191 * __div__, __rdiv__, and __idiv__
1192 * nb_divide, nb_inplace_divide
1193 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
1194 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
1195 if we want to re-use __div__ and friends. If we do, it will make
1196 it harder to write code for both 2.x and 3.x.)
1197
1198- 'as' and 'with' are keywords.
1199
1200- Absolute import is the default behavior for 'import foo' etc.
1201
Georg Brandl52b92cc2008-05-25 09:43:03 +00001202- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001203
Georg Brandl52b92cc2008-05-25 09:43:03 +00001204- Removed these Python builtins: apply(), callable(), coerce(),
1205 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +00001206
Georg Brandl52b92cc2008-05-25 09:43:03 +00001207- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001208
Georg Brandl52b92cc2008-05-25 09:43:03 +00001209- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001210
1211- Remove C API support for restricted execution.
1212
Guido van Rossumcf1be882007-08-30 22:07:17 +00001213- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +00001214 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +00001215 sequences of unequal length -- it now stops after the shortest one
1216 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001217
Georg Brandl52b92cc2008-05-25 09:43:03 +00001218- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001219
1220- Added class decorators per PEP 3129.
1221
1222
1223Extension Modules
1224-----------------
1225
Georg Brandl52b92cc2008-05-25 09:43:03 +00001226- Removed the imageop module. Obsolete long with its unit tests
1227 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001228
Georg Brandl52b92cc2008-05-25 09:43:03 +00001229- Removed these attributes from the operator module: div, idiv,
1230 __div__, __idiv__, isCallable, sequenceIncludes.
1231
1232- Removed these attributes from the sys module: exc_clear(), exc_type,
1233 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001234
1235
1236Library
1237-------
1238
Georg Brandl52b92cc2008-05-25 09:43:03 +00001239- Removed the compiler package. Use of the _ast module and (an
1240 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001241
Georg Brandl52b92cc2008-05-25 09:43:03 +00001242- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
1243 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
1244 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001245
Georg Brandl52b92cc2008-05-25 09:43:03 +00001246- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001247
Georg Brandl52b92cc2008-05-25 09:43:03 +00001248- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1249 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1250 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001251
Georg Brandl52b92cc2008-05-25 09:43:03 +00001252- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001253
Georg Brandl52b92cc2008-05-25 09:43:03 +00001254- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001255 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001256
Georg Brandl52b92cc2008-05-25 09:43:03 +00001257- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001258
Georg Brandl52b92cc2008-05-25 09:43:03 +00001259- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001260
1261- Patch #1680961: atexit has been reimplemented in C.
1262
Walter Dörwald41980ca2007-08-16 21:55:45 +00001263- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1264
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001265Build
1266-----
1267
1268C API
1269-----
1270
Georg Brandl52b92cc2008-05-25 09:43:03 +00001271- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001272
Georg Brandl52b92cc2008-05-25 09:43:03 +00001273- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1274 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001275
Georg Brandl52b92cc2008-05-25 09:43:03 +00001276- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001277
Georg Brandl52b92cc2008-05-25 09:43:03 +00001278- Removed these macros: staticforward, statichere, PyArg_GetInt,
1279 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001280
Georg Brandl52b92cc2008-05-25 09:43:03 +00001281- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1282 intintobjargproc, getreadbufferproc, getwritebufferproc,
1283 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001284
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001285Tests
1286-----
1287
Brett Cannone7a30f72008-03-03 03:36:27 +00001288- Removed test.testall as test.regrtest replaces it.
1289
Brett Cannonced04e02005-02-13 22:53:22 +00001290Documentation
1291-------------
1292
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001293Mac
1294---
1295
Georg Brandl52b92cc2008-05-25 09:43:03 +00001296- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001297
Guido van Rossum845702c2007-08-30 18:44:53 +00001298Platforms
1299---------
1300
1301- Support for BeOS and AtheOS was removed (according to PEP 11).
1302
1303- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1304
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001305Tools/Demos
1306-----------
1307
Georg Brandl52b92cc2008-05-25 09:43:03 +00001308
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001309**(For information about older versions, consult the HISTORY file.)**