blob: 40de49663a26224122cbe39d140515dafb69755d [file] [log] [blame]
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001+++++++++++
2Python News
3+++++++++++
4
Anthony Baxterb0c66302004-11-04 05:23:17 +00005(editors: check NEWS.help for information about editing NEWS using ReST.)
6
Barry Warsaw66079cd2008-04-04 01:36:36 +00007What's New in Python 3.0a5?
8===========================
9
10*Release date: XX-XXX-2008*
11
12Core and Builtins
13-----------------
14
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +000015- Issue #2221: Corrected a SystemError "error return without exception set",
16 when the code executed by exec() raises an exception, and sys.stdout.flush()
17 also raises an error.
18
Martin v. Löwis250ad612008-04-07 05:43:42 +000019- Bug #2565: The repr() of type objects now calls them 'class',
20 not 'type' - whether they are builtin types or not.
21
Martin v. Löwis790465f2008-04-05 20:41:37 +000022- The command line processing was converted to pass Unicode strings
23 through as unmodified as possible; as a consequence, the C API
24 related to command line arguments was changed to use wchar_t.
25
Barry Warsaw66079cd2008-04-04 01:36:36 +000026Extension Modules
27-----------------
28
29Library
30-------
31
Martin v. Löwis8efc62c2008-04-10 19:02:25 +000032- Bug #2606: Avoid calling .sort() on a dict_keys object.
33
Thomas Hellerbff533b2008-04-04 19:53:14 +000034- The bundled libffi copy is now in sync with the recently released
35 libffi3.0.5 version, apart from some small changes to
36 Modules/_ctypes/libffi/configure.ac.
37
Thomas Hellerf44b9a12008-04-04 10:18:23 +000038Build
39-----
40
Guido van Rossumdc21db32008-04-07 18:37:41 +000041- "make install" is now an alias for "make altinstall", to prevent
42 accidentally overwriting a Python 2.x installation.
43 Use "make fullinstall" to force Python 3.0 to be installed as
44 "python".
45
Thomas Hellerf44b9a12008-04-04 10:18:23 +000046- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
47 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +000048
Barry Warsawa9d499d2008-03-01 18:38:07 +000049What's New in Python 3.0a4?
50===========================
51
Barry Warsawbb5cd082008-04-02 23:33:27 +000052*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +000053
Martin v. Löwis25931462008-03-17 20:43:42 +000054Core and Builtins
55-----------------
56
57- Bug #2301: Don't try decoding the source code into the original
58 encoding for syntax errors.
59
Martin v. Löwis92fab752008-03-08 10:40:41 +000060Extension Modules
61-----------------
62
Neal Norwitz6cf49cf2008-03-24 06:22:57 +000063- The dl module was removed, use the ctypes module instead.
64
Martin v. Löwis92fab752008-03-08 10:40:41 +000065- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +000066
Martin v. Löwis071ef772008-03-08 11:24:24 +000067Library
68-------
69
Martin v. Löwis73a22f02008-03-22 00:35:10 +000070- The class distutils.commands.build_py.build_py_2to3 can be used
71 as a build_py replacement to automatically run 2to3 on modules
72 that are going to be installed.
73
Guido van Rossumf4169812008-03-17 22:56:06 +000074- A new pickle protocol (protocol 3) is added with explicit support
75 for bytes. This is the default protocol. It intentionally cannot
76 be unpickled by Python 2.x.
77
78- When a pickle written by Python 2.x contains an (8-bit) str
79 instance, this is now decoded to a (Unicode) str instance. The
80 encoding used to do this defaults to ASCII, but can be overridden
81 via two new keyword arguments to the Unpickler class. Previously
82 this would create bytes instances, which is usually wrong: str
83 instances are often used to pickle attribute names etc., and text is
84 more common than binary data anyway.
85
Martin v. Löwis071ef772008-03-08 11:24:24 +000086- Default to ASCII as the locale.getpreferredencoding, if the POSIX
87 system doesn't support CODESET and LANG isn't set or doesn't
88 allow deduction of an encoding.
89
Gregory P. Smith425136b2008-03-17 20:45:21 +000090- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned value.
91
Trent Nelson428de652008-03-18 22:41:35 +000092- Issue #719888: Updated tokenize to use a bytes API. generate_tokens has been
93 renamed tokenize and now works with bytes rather than strings. A new
94 detect_encoding function has been added for determining source file encoding
95 according to PEP-0263. Token sequences returned by tokenize always start
96 with an ENCODING token which specifies the encoding used to decode the file.
97 This token is used to encode the output of untokenize back to bytes.
Barry Warsawa9d499d2008-03-01 18:38:07 +000098
Christian Heimesbc873412007-12-08 22:11:32 +000099What's New in Python 3.0a3?
100===========================
101
Barry Warsaw659fc422008-03-01 17:45:23 +0000102*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000103
104Core and Builtins
105-----------------
106
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000107- Issue #2282: io.TextIOWrapper was not overriding seekable() from io.IOBase.
108
Benjamin Petersonec79aad2008-04-02 22:44:10 +0000109- Issue #2115: Important speedup in setting __slot__ attributes. Also
110 prevent a possible crash: an Abstract Base Class would try to access a slot
Christian Heimesa156e092008-02-16 07:38:31 +0000111 on a registered virtual subclass.
112
113- Fixed repr() and str() of complex numbers with infinity or nan as real or
114 imaginary part.
115
116- Clear all free list during a gc.collect() of the highest generation in order
117 to allow pymalloc to free more arenas. Python may give back memory to the
118 OS earlier.
119
120- Issue #2045: Fix an infinite recursion triggered when printing a subclass of
121 collections.defaultdict, if its default_factory is set to a bound method.
122
123- Fixed a minor memory leak in dictobject.c. The content of the free
124 list was not freed on interpreter shutdown.
125
126- Limit free list of method and builtin function objects to 256 entries
127 each.
128
129- Patch #1953: Added ``sys._compact_freelists()`` and the C API functions
130 ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
131 to compact the internal free lists of pre-allocted ints and floats.
132
133- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
134 Python expected the return type int but the fork familie returns pi_t.
135
136- Issue #1678380: Fix a bug that identifies 0j and -0j when they appear
137 in the same code unit.
138
Raymond Hettinger65baa342008-02-07 00:41:02 +0000139- Issue #2025 : Add tuple.count() and tuple.index() methods to comply with
140 the collections.Sequence API.
141
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000142- Fixed multiple reinitialization of the Python interpreter. The small int
143 list in longobject.c has caused a seg fault during the third finalization.
144
Christian Heimesc04dac02008-01-30 11:27:57 +0000145- Issue #1973: bytes.fromhex('') raises SystemError
146
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000147- Issue #1771: remove cmp parameter from sorted() and list.sort()
148
Christian Heimes7b876152008-01-30 09:51:48 +0000149- Issue #1969: split and rsplit in bytearray are inconsistent
150
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000151- map() and no longer accepts None for the first argument.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000152 Use zip() instead.
153
Facundo Batista2336bdd2008-01-19 19:12:01 +0000154- Issue #1769: Now int("- 1") is not allowed any more.
155
Christian Heimes386cd1e2008-01-15 02:01:20 +0000156- Object/longobject.c: long(float('nan')) raises an OverflowError instead
157 of returning 0.
158
Christian Heimes3b06e532008-01-07 20:12:44 +0000159- Issue #1762972: __file__ points to the source file instead of the pyc/pyo
160 file if the py file exists.
161
Guido van Rossumab078dd2008-01-06 00:09:11 +0000162- Issue #1393: object_richcompare() returns NotImplemented instead of
163 False if the objects aren't equal, to give the other side a chance.
164
Guido van Rossume239b002008-01-06 00:44:20 +0000165- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000166
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000167- Improve some exception messages when Windows fails to load an extension
168 module. Now we get for example '%1 is not a valid Win32 application' instead
169 of 'error code 193'. Also use Unicode strings to deal with non-English
170 locales.
171
Christian Heimesa3534a62007-12-11 19:56:40 +0000172- Issue #1587: Added instancemethod wrapper for PyCFunctions. The Python C API
173 has gained a new type *PyInstanceMethod_Type* and the functions
174 *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)* and
175 *PyInstanceMethod_Function(im)*.
176
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000177- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed from the
178 gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE are now enough to
179 print the corresponding list of objects considered by the garbage collector.
180
Guido van Rossume239b002008-01-06 00:44:20 +0000181- Issue #1573: Improper use of the keyword-only syntax makes the parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000182
Christian Heimes0ded5b52007-12-10 15:50:56 +0000183- Issue #1564: The set implementation should special-case PyUnicode instead
Guido van Rossume239b002008-01-06 00:44:20 +0000184 of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000185
Guido van Rossumea6775b2008-02-21 20:16:31 +0000186- Patch #1031213: Decode source line in SyntaxErrors back to its
187 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000188
Christian Heimes09aaa882008-02-23 15:01:06 +0000189- inspect.getsource() includes the decorators again.
190
Guido van Rossumea6775b2008-02-21 20:16:31 +0000191- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
192 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000193
Christian Heimes7131fd92008-02-19 14:21:46 +0000194- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when the
Guido van Rossumea6775b2008-02-21 20:16:31 +0000195 first chunk fed to the decoder started with a BOM, but was longer than 3
196 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000197
Christian Heimes7131fd92008-02-19 14:21:46 +0000198
Christian Heimesbc873412007-12-08 22:11:32 +0000199Extension Modules
200-----------------
201
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000202- Code for itertools ifilter(), imap(), and izip() moved to bultins and
203 renamed to filter(), map(), and zip(). Also, renamed izip_longest()
204 to zip_longest() and ifilterfalse() to filterfalse().
205
Christian Heimes043d6f62008-01-07 17:19:16 +0000206- Issue #1762972: Readded the reload() function as imp.reload()
Guido van Rossumea6775b2008-02-21 20:16:31 +0000207
Christian Heimesa156e092008-02-16 07:38:31 +0000208- Bug #2111: mmap segfaults when trying to write a block opened with PROT_READ
209
210- #2063: correct order of utime and stime in os.times() result on Windows.
Christian Heimesbc873412007-12-08 22:11:32 +0000211
Christian Heimes7131fd92008-02-19 14:21:46 +0000212
Christian Heimesbc873412007-12-08 22:11:32 +0000213Library
214-------
215
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000216- Weakref dictionaries now inherit from MutableMapping.
217 XXX their API still needs to be modernized (i.e. eliminate the iter methods).
218
219- Created new UserDict class in collections module. This one inherits from and
Raymond Hettingerb3a65f82008-02-21 22:11:37 +0000220 complies with the MutableMapping ABC. Also, moved UserString and UserList
221 to the collections module. The MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000222
Guido van Rossumea6775b2008-02-21 20:16:31 +0000223- Removed UserDict.DictMixin. Replaced all its uses with
224 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000225
Guido van Rossume239b002008-01-06 00:44:20 +0000226- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000227
Guido van Rossume239b002008-01-06 00:44:20 +0000228- Issue #1585: IDLE uses non-existent xrange() function.
229
230- Issue #1578: Problems in win_getpass.
231
Georg Brandl52d168a2008-01-07 18:10:24 +0000232Build
233-----
234
235- Renamed --enable-unicode configure flag to --with-wide-unicode, since
236 Unicode strings can't be disabled anymore.
237
238
Guido van Rossume239b002008-01-06 00:44:20 +0000239C API
240-----
241
242- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
243 Py_TYPE and Py_REFCNT.
244
245- New API PyImport_ImportModuleNoBlock(), works like PyImport_ImportModule()
246 but won't block on the import lock (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000247
Christian Heimesbc873412007-12-08 22:11:32 +0000248
Fred Drake0e474a82007-10-11 18:01:43 +0000249What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000250===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000251
Guido van Rossum99533a92007-12-06 05:07:41 +0000252*Release date: 07-Dec-2007*
253
254(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000255
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000256Core and Builtins
257-----------------
258
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000259- str8 now has the same construction signature as bytes.
260
Brett Cannon40430012007-10-22 20:24:51 +0000261- Comparisons between str and str8 now return False/True for ==/!=. sqlite3
262 returns str8 when recreating on object from it's __conform__ value. The
263 struct module returns str8 for all string-related formats. This was true
264 before this change, but becomes more apparent thanks to string comparisons
265 always being False.
266
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000267- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode, buffer,
268 encoding, newline)`
269
270- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
271
272- Changed `__file__` and `co_filename` to unicode. The path names are decoded
273 with `Py_FileSystemDefaultEncoding` and a new API method
274 `PyUnicode_DecodeFSDefault(char*)` was added.
275
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000276- io.open() and _fileio.FileIO have grown a new argument closefd. A false
277 value disables the closing of the file descriptor.
278
Guido van Rossum98297ee2007-11-06 21:34:58 +0000279- Added a new option -b to issues warnings (-bb for errors) about certain
280 operations between bytes/buffer and str like str(b'') and comparsion.
281
Christian Heimes58cb1b82007-11-13 02:19:40 +0000282- The standards streams sys.stdin, stdout and stderr may be None when the
283 when the C runtime library returns an invalid file descriptor for the
284 streams (fileno(stdin) < 0). For now this happens only for Windows GUI
285 apps and scripts started with `pythonw.exe`.
286
Christian Heimesbce52be2007-11-17 19:08:41 +0000287- Added PCbuild9 directory for VS 2008.
288
289- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to work
290 around a name clash with VS 2008 on Windows.
291
Christian Heimesff737952007-11-27 10:40:20 +0000292- Unbound methods are gone for good. ClassObject.method returns an ordinary
293 function object, instance.method still returns a bound method object.
294 The API of bound methods is cleaned up, too. The im_class attribute is
295 removed and im_func + im_self are renamed to __func__ and __self__. The
296 factory PyMethod_New takes only func and instance as argument.
297
Christian Heimesf78b1c62007-12-02 16:52:32 +0000298- intobject.h is no longer included by Python.h. The remains were moved
299 to longobject.h. It still exists to define several aliases from PyInt_
300 to PyLong_ functions.
301
Christian Heimesa37d4c62007-12-04 23:02:19 +0000302- Removed sys.maxint, use sys.maxsize instead.
303
Christian Heimesbce52be2007-11-17 19:08:41 +0000304
Fred Drake0e474a82007-10-11 18:01:43 +0000305Extension Modules
306-----------------
307
308- The `hotshot` profiler has been removed; use `cProfile` instead.
309
310
Brett Cannone9fd2312007-10-12 19:18:19 +0000311Library
312-------
313
314- When loading an external file using testfile(), the passed-in encoding
315 argument was being ignored if __loader__ is defined and forcing the source to
316 be UTF-8.
317
Guido van Rossum687b9c02007-10-25 23:18:51 +0000318- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have been
319 removed in favor of the tempfile module.
320
Christian Heimesc9543e42007-11-28 08:28:28 +0000321- Removed the 'new' module.
322
323- Removed all types from the 'types' module that are easily accessable through
324 builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000325
Georg Brandl52d168a2008-01-07 18:10:24 +0000326
Guido van Rossum4405cf32007-08-30 17:16:55 +0000327What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000328==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000329
Guido van Rossum4405cf32007-08-30 17:16:55 +0000330*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000331
332Core and Builtins
333-----------------
334
Martin v. Löwis47383402007-08-15 07:32:56 +0000335- PEP 3131: Support non-ASCII identifiers.
336
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000337- PEP 3120: Change default encoding to UTF-8.
338
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000339- PEP 3123: Use proper C inheritance for PyObject.
340
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000341- Removed the __oct__ and __hex__ special methods and added a bin()
342 builtin function.
343
344- PEP 3127: octal literals now start with "0o". Old-style octal literals
345 are invalid. There are binary literals with a prefix of "0b".
346 This also affects int(x, 0).
347
Guido van Rossume7ba4952007-06-06 23:52:48 +0000348- None, True, False are now keywords.
349
Guido van Rossum29478ef2007-05-29 00:39:44 +0000350- PEP 3119: isinstance() and issubclass() can be overridden.
351
Guido van Rossumebe3e162007-05-17 18:20:34 +0000352- Remove BaseException.message.
353
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000354- Remove tuple parameter unpacking (PEP 3113).
355
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000356- Remove the f_restricted attribute from frames. This naturally leads to the
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000357 removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
358
Guido van Rossum0368b722007-05-11 16:50:42 +0000359- PEP 3132 was accepted. That means that you can do ``a, *b = range(5)``
360 to assign 0 to a and [1, 2, 3, 4] to b.
361
Guido van Rossum805365e2007-05-07 22:24:25 +0000362- range() now returns an iterator rather than a list. Floats are not allowed.
363 xrange() is no longer defined.
364
Nick Coghlan650f0d02007-04-15 12:05:43 +0000365- Patch #1660500: hide iteration variable in list comps, add set comps
366 and use common code to handle compilation of iterative expressions
367
Guido van Rossume27dc722007-03-27 22:37:34 +0000368- By default, != returns the opposite of ==, unless the latter returns
369 NotImplemented.
370
Collin Winter670e6922007-03-21 02:57:17 +0000371- Patch #1680961: sys.exitfunc has been removed and replaced with a private
372 C-level API.
373
Georg Brandl801dd732007-03-18 20:18:31 +0000374- PEP 3115: new metaclasses: the metaclass is now specified as a
375 keyword arg in the class statement, which can now use the full syntax of
376 a parameter list. Also, the metaclass can implement a __prepare__ function
377 which will be called to create the dictionary for the new class namespace.
378
Georg Brandl428f0642007-03-18 18:35:15 +0000379- The long-deprecated argument "pend" of PyFloat_FromString() has been
380 removed.
381
Georg Brandle32b4222007-03-10 22:13:27 +0000382- The dir() function has been extended to call the __dir__() method on
383 its argument, if it exists. If not, it will work like before. This allows
384 customizing the output of dir() in the presence of a __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000385
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000386- Removed support for __members__ and __methods__.
387
Georg Brandle32b4222007-03-10 22:13:27 +0000388- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000389
Georg Brandle32b4222007-03-10 22:13:27 +0000390- input() became raw_input(): the name input() now implements the
Guido van Rossum0240b922007-02-26 21:23:50 +0000391 functionality formerly known as raw_input(); the name raw_input()
392 is no longer defined.
393
Brett Cannon39590462007-02-26 22:01:14 +0000394- Classes listed in an 'except' clause must inherit from BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000395
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000396- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000397 and .keys(), .items(), .values() return dict views, which behave
398 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000399
Guido van Rossum8b545362007-02-09 23:52:14 +0000400- PEP 3105: print is now a function. Also (not in the PEP) the
401 'softspace' attribute of files is now gone (since print() doesn't use
402 it). A side effect of this change is that you can get incomplete
403 output lines in interactive sessions:
404
405 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000406 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000407
408 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000409
Brett Cannon398db8b2007-01-29 23:44:37 +0000410- PEP 3102: keyword-only arguments.
411
Guido van Rossumd4588c12007-02-13 19:55:23 +0000412- Int/Long unification is complete. The 'long' built-in type
Guido van Rossumec7027f2007-01-30 00:00:40 +0000413 and literals with trailing 'L' or 'l' have been removed.
414 Performance may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000415
416- 'except E, V' must now be spelled as 'except E as V' and deletes V
417 at the end of the except clause; V must be a simple name.
418
Neal Norwitzc1505362006-12-28 06:47:50 +0000419- Added function annotations per PEP 3107.
420
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000421- Added nonlocal declaration from PEP 3104
422
423 >>> def f(x):
424 ... def inc():
425 ... nonlocal x
426 ... x += 1
427 ... return x
428 ... return inc
429 ...
430 >>> inc = f(0)
431 >>> inc()
432 1
433 >>> inc()
434 2
435
Georg Brandl66a796e2006-12-19 20:50:34 +0000436- Moved intern() to sys.intern().
437
438- exec is now a function.
439
440- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000441
Neal Norwitz4886cc32006-08-21 17:06:07 +0000442- Classic classes are a thing of the past. All classes are new style.
443
444- Exceptions *must* derive from BaseException.
445
446- Integer division always returns a float. The -Q option is no more.
447 All the following are gone:
448 * PyNumber_Divide and PyNumber_InPlaceDivide
449 * __div__, __rdiv__, and __idiv__
450 * nb_divide, nb_inplace_divide
451 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
452 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
453 if we want to re-use __div__ and friends. If we do, it will make
454 it harder to write code for both 2.x and 3.x.)
455
456- 'as' and 'with' are keywords.
457
458- Absolute import is the default behavior for 'import foo' etc.
459
Neal Norwitz378b2c92006-08-29 07:57:22 +0000460- Removed support for syntax:
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000461 backticks (ie, `x`), <>
Neal Norwitz378b2c92006-08-29 07:57:22 +0000462
Neal Norwitz4886cc32006-08-21 17:06:07 +0000463- Removed these Python builtins:
Neal Norwitz01688022007-08-12 00:43:29 +0000464 apply(), callable(), coerce(), execfile(), file(), reduce(), reload()
Neal Norwitz4886cc32006-08-21 17:06:07 +0000465
Neal Norwitz378b2c92006-08-29 07:57:22 +0000466- Removed these Python methods:
467 {}.has_key
468
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000469- Removed these opcodes:
470 BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT
471
472- Remove C API support for restricted execution.
473
Guido van Rossumcf1be882007-08-30 22:07:17 +0000474- zip(), map() and filter() now return iterators, behaving like their
475 itertools counterparts. This also affect map()'s behavior on
476 sequences of unequal length -- it now stops after the shortest one
477 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000478
479- Additions:
Guido van Rossumcf1be882007-08-30 22:07:17 +0000480 set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000481
482- Added class decorators per PEP 3129.
483
484
485Extension Modules
486-----------------
487
488- Remove the imageop module. Obsolete long with its unit tests becoming
489 useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000490
491- Removed these attributes from Python modules:
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000492 * operator module: div, idiv, __div__, __idiv__, isCallable, sequenceIncludes
Guido van Rossume7ba4952007-06-06 23:52:48 +0000493 * sys module: exc_clear(), exc_type, exc_value, exc_traceback
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000494
495
496Library
497-------
498
499- Remove the compiler package. Use of the _ast module and (an eventual)
500 AST -> bytecode mechanism.
501
502- Removed these modules:
Guido van Rossum33d26892007-08-05 15:29:28 +0000503 * audiodev, Bastion, bsddb185, exceptions, linuxaudiodev,
504 md5, MimeWriter, mimify, popen2,
505 rexec, sets, sha, stringold, strop, sunaudiodev, timing, xmllib.
506
507- Moved these modules to Tools/Demos:
508 * toaiff
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000509
510- Remove obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL, DEVICE,
511 ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile, IOCTL, jpeg,
512 panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
513
514- Remove obsolete functions:
515 * commands.getstatus(), os.popen*,
516
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000517- Remove functions in the string module that are also string methods;
518 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000519
520- Remove support for long obsolete platforms: plat-aix3, plat-irix5.
521
522- Remove xmlrpclib.SlowParser. It was based on xmllib.
523
524- Patch #1680961: atexit has been reimplemented in C.
525
Walter Dörwald41980ca2007-08-16 21:55:45 +0000526- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
527
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000528
529Build
530-----
531
532C API
533-----
534
535- Removed these Python slots:
536 __coerce__, __div__, __idiv__, __rdiv__
Neal Norwitz4886cc32006-08-21 17:06:07 +0000537
Neal Norwitz4886cc32006-08-21 17:06:07 +0000538- Removed these C APIs:
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000539 PyNumber_Coerce(), PyNumber_CoerceEx(), PyMember_Get, PyMember_Set
Neal Norwitz4886cc32006-08-21 17:06:07 +0000540
541- Removed these C slots/fields:
542 nb_divide, nb_inplace_divide
543
544- Removed these macros:
Neal Norwitz30d1c512007-08-19 22:48:23 +0000545 staticforward, statichere, PyArg_GetInt, PyArg_NoArgs, _PyObject_Del
Neal Norwitz4886cc32006-08-21 17:06:07 +0000546
547- Removed these typedefs:
548 intargfunc, intintargfunc, intobjargproc, intintobjargproc,
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000549 getreadbufferproc, getwritebufferproc, getsegcountproc, getcharbufferproc,
550 memberlist
Neal Norwitz4886cc32006-08-21 17:06:07 +0000551
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000552
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000553Tests
554-----
555
Brett Cannone7a30f72008-03-03 03:36:27 +0000556- Removed test.testall as test.regrtest replaces it.
557
558
Brett Cannonced04e02005-02-13 22:53:22 +0000559Documentation
560-------------
561
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000562Mac
563---
564
Guido van Rossume7ba4952007-06-06 23:52:48 +0000565- The cfmfile was removed.
566
567
Guido van Rossum845702c2007-08-30 18:44:53 +0000568Platforms
569---------
570
571- Support for BeOS and AtheOS was removed (according to PEP 11).
572
573- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
574
Hye-Shik Chang4e422812005-07-17 02:36:59 +0000575
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000576Tools/Demos
577-----------
578
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000579**(For information about older versions, consult the HISTORY file.)**