blob: 9c6feeb2ef30287abdefe741c31d84f0138ad2ab [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
Brett Cannon0d71ee72008-05-08 18:13:40 +00007What's new in Python 3.0b1?
8===========================
9
10*Release date: XX-June-2008*
11
12Core and Builtins
13-----------------
14
Mark Dickinsonc4352b02008-05-09 13:55:01 +000015- Issue 2801: fix bug in the float.is_integer method where a ValueError
16 was sometimes incorrectly raised.
17
Brett Cannon0d71ee72008-05-08 18:13:40 +000018Extension Modules
19-----------------
20
21Library
22-------
23
Brett Cannonf4fd9932008-05-10 21:11:46 +000024- The dircache module has been removed.
25
Brett Cannond175b4c2008-05-10 03:19:54 +000026- The Canvas module has been removed.
27
Mark Dickinsonb27406c2008-05-09 13:42:33 +000028- The Decimal module gained the magic methods __round__, __ceil__,
29 __floor__ and __trunc__, to give support for round, math.ceil,
30 math.floor and math.trunc.
31
Brett Cannon900ee3a2008-05-08 20:31:11 +000032- The user module has been removed.
33
Brett Cannon34afe872008-05-08 20:31:44 +000034- The mutex module has been removed.
35
Brett Cannon0d71ee72008-05-08 18:13:40 +000036- The imputil module has been removed.
37
Benjamin Petersond71ca412008-05-08 23:44:58 +000038- os.path.walk has been removed in favor of os.walk
39
Brett Cannon0d71ee72008-05-08 18:13:40 +000040Build
41-----
42
43
Barry Warsaw66079cd2008-04-04 01:36:36 +000044What's New in Python 3.0a5?
45===========================
46
Barry Warsaw9eab8b02008-05-08 13:05:38 +000047*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +000048
49Core and Builtins
50-----------------
51
Mark Dickinson7ab6be22008-04-15 21:42:42 +000052- Fix misbehaviour of PyLong_FromSsize_t on systems where sizeof(size_t) >
53 sizeof(long).
54
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +000055- Issue #2221: Corrected a SystemError "error return without exception set",
56 when the code executed by exec() raises an exception, and sys.stdout.flush()
57 also raises an error.
58
Martin v. Löwis250ad612008-04-07 05:43:42 +000059- Bug #2565: The repr() of type objects now calls them 'class',
60 not 'type' - whether they are builtin types or not.
61
Martin v. Löwis790465f2008-04-05 20:41:37 +000062- The command line processing was converted to pass Unicode strings
63 through as unmodified as possible; as a consequence, the C API
64 related to command line arguments was changed to use wchar_t.
65
Benjamin Petersona2f837f2008-04-28 21:05:10 +000066- All backslashes in raw strings are interpreted literally. This means that
67 '\u' and '\U' escapes are not treated specially.
68
Barry Warsaw66079cd2008-04-04 01:36:36 +000069Extension Modules
70-----------------
71
72Library
73-------
74
Thomas Hellerb041fda2008-04-30 17:11:46 +000075- ctypes objects now support the PEP3118 buffer interface
76
Thomas Hellere106dc32008-04-24 18:39:36 +000077- Issue #2682: ctypes callback functions now longer contain a cyclic
78 reference to themselves.
79
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +000080- Issue #2058: Remove the buf attribute and add __slots__ to the TarInfo
81 class in order to reduce tarfile's memory usage.
82
Martin v. Löwis8efc62c2008-04-10 19:02:25 +000083- Bug #2606: Avoid calling .sort() on a dict_keys object.
84
Thomas Hellerbff533b2008-04-04 19:53:14 +000085- The bundled libffi copy is now in sync with the recently released
86 libffi3.0.5 version, apart from some small changes to
87 Modules/_ctypes/libffi/configure.ac.
88
Thomas Hellerf44b9a12008-04-04 10:18:23 +000089Build
90-----
91
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +000092- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
93
Guido van Rossumdc21db32008-04-07 18:37:41 +000094- "make install" is now an alias for "make altinstall", to prevent
95 accidentally overwriting a Python 2.x installation.
96 Use "make fullinstall" to force Python 3.0 to be installed as
97 "python".
98
Thomas Hellerf44b9a12008-04-04 10:18:23 +000099- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
100 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000101
Barry Warsawa9d499d2008-03-01 18:38:07 +0000102What's New in Python 3.0a4?
103===========================
104
Barry Warsawbb5cd082008-04-02 23:33:27 +0000105*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000106
Martin v. Löwis25931462008-03-17 20:43:42 +0000107Core and Builtins
108-----------------
109
110- Bug #2301: Don't try decoding the source code into the original
111 encoding for syntax errors.
112
Martin v. Löwis92fab752008-03-08 10:40:41 +0000113Extension Modules
114-----------------
115
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000116- The dl module was removed, use the ctypes module instead.
117
Martin v. Löwis92fab752008-03-08 10:40:41 +0000118- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000119
Martin v. Löwis071ef772008-03-08 11:24:24 +0000120Library
121-------
122
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000123- The class distutils.commands.build_py.build_py_2to3 can be used
124 as a build_py replacement to automatically run 2to3 on modules
125 that are going to be installed.
126
Guido van Rossumf4169812008-03-17 22:56:06 +0000127- A new pickle protocol (protocol 3) is added with explicit support
128 for bytes. This is the default protocol. It intentionally cannot
129 be unpickled by Python 2.x.
130
131- When a pickle written by Python 2.x contains an (8-bit) str
132 instance, this is now decoded to a (Unicode) str instance. The
133 encoding used to do this defaults to ASCII, but can be overridden
134 via two new keyword arguments to the Unpickler class. Previously
135 this would create bytes instances, which is usually wrong: str
136 instances are often used to pickle attribute names etc., and text is
137 more common than binary data anyway.
138
Martin v. Löwis071ef772008-03-08 11:24:24 +0000139- Default to ASCII as the locale.getpreferredencoding, if the POSIX
140 system doesn't support CODESET and LANG isn't set or doesn't
141 allow deduction of an encoding.
142
Gregory P. Smith425136b2008-03-17 20:45:21 +0000143- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned value.
144
Trent Nelson428de652008-03-18 22:41:35 +0000145- Issue #719888: Updated tokenize to use a bytes API. generate_tokens has been
146 renamed tokenize and now works with bytes rather than strings. A new
147 detect_encoding function has been added for determining source file encoding
148 according to PEP-0263. Token sequences returned by tokenize always start
149 with an ENCODING token which specifies the encoding used to decode the file.
150 This token is used to encode the output of untokenize back to bytes.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000151
Christian Heimesbc873412007-12-08 22:11:32 +0000152What's New in Python 3.0a3?
153===========================
154
Barry Warsaw659fc422008-03-01 17:45:23 +0000155*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000156
157Core and Builtins
158-----------------
159
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000160- Issue #2282: io.TextIOWrapper was not overriding seekable() from io.IOBase.
161
Benjamin Petersonec79aad2008-04-02 22:44:10 +0000162- Issue #2115: Important speedup in setting __slot__ attributes. Also
163 prevent a possible crash: an Abstract Base Class would try to access a slot
Christian Heimesa156e092008-02-16 07:38:31 +0000164 on a registered virtual subclass.
165
166- Fixed repr() and str() of complex numbers with infinity or nan as real or
167 imaginary part.
168
169- Clear all free list during a gc.collect() of the highest generation in order
170 to allow pymalloc to free more arenas. Python may give back memory to the
171 OS earlier.
172
173- Issue #2045: Fix an infinite recursion triggered when printing a subclass of
174 collections.defaultdict, if its default_factory is set to a bound method.
175
176- Fixed a minor memory leak in dictobject.c. The content of the free
177 list was not freed on interpreter shutdown.
178
179- Limit free list of method and builtin function objects to 256 entries
180 each.
181
182- Patch #1953: Added ``sys._compact_freelists()`` and the C API functions
183 ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
184 to compact the internal free lists of pre-allocted ints and floats.
185
186- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
187 Python expected the return type int but the fork familie returns pi_t.
188
189- Issue #1678380: Fix a bug that identifies 0j and -0j when they appear
190 in the same code unit.
191
Raymond Hettinger65baa342008-02-07 00:41:02 +0000192- Issue #2025 : Add tuple.count() and tuple.index() methods to comply with
193 the collections.Sequence API.
194
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000195- Fixed multiple reinitialization of the Python interpreter. The small int
196 list in longobject.c has caused a seg fault during the third finalization.
197
Christian Heimesc04dac02008-01-30 11:27:57 +0000198- Issue #1973: bytes.fromhex('') raises SystemError
199
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000200- Issue #1771: remove cmp parameter from sorted() and list.sort()
201
Christian Heimes7b876152008-01-30 09:51:48 +0000202- Issue #1969: split and rsplit in bytearray are inconsistent
203
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000204- map() and no longer accepts None for the first argument.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000205 Use zip() instead.
206
Facundo Batista2336bdd2008-01-19 19:12:01 +0000207- Issue #1769: Now int("- 1") is not allowed any more.
208
Christian Heimes386cd1e2008-01-15 02:01:20 +0000209- Object/longobject.c: long(float('nan')) raises an OverflowError instead
210 of returning 0.
211
Christian Heimes3b06e532008-01-07 20:12:44 +0000212- Issue #1762972: __file__ points to the source file instead of the pyc/pyo
213 file if the py file exists.
214
Guido van Rossumab078dd2008-01-06 00:09:11 +0000215- Issue #1393: object_richcompare() returns NotImplemented instead of
216 False if the objects aren't equal, to give the other side a chance.
217
Guido van Rossume239b002008-01-06 00:44:20 +0000218- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000219
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000220- Improve some exception messages when Windows fails to load an extension
221 module. Now we get for example '%1 is not a valid Win32 application' instead
222 of 'error code 193'. Also use Unicode strings to deal with non-English
223 locales.
224
Christian Heimesa3534a62007-12-11 19:56:40 +0000225- Issue #1587: Added instancemethod wrapper for PyCFunctions. The Python C API
226 has gained a new type *PyInstanceMethod_Type* and the functions
227 *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)* and
228 *PyInstanceMethod_Function(im)*.
229
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000230- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed from the
231 gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE are now enough to
232 print the corresponding list of objects considered by the garbage collector.
233
Guido van Rossume239b002008-01-06 00:44:20 +0000234- Issue #1573: Improper use of the keyword-only syntax makes the parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000235
Christian Heimes0ded5b52007-12-10 15:50:56 +0000236- Issue #1564: The set implementation should special-case PyUnicode instead
Guido van Rossume239b002008-01-06 00:44:20 +0000237 of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000238
Guido van Rossumea6775b2008-02-21 20:16:31 +0000239- Patch #1031213: Decode source line in SyntaxErrors back to its
240 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000241
Christian Heimes09aaa882008-02-23 15:01:06 +0000242- inspect.getsource() includes the decorators again.
243
Guido van Rossumea6775b2008-02-21 20:16:31 +0000244- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
245 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000246
Christian Heimes7131fd92008-02-19 14:21:46 +0000247- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when the
Guido van Rossumea6775b2008-02-21 20:16:31 +0000248 first chunk fed to the decoder started with a BOM, but was longer than 3
249 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000250
Christian Heimes7131fd92008-02-19 14:21:46 +0000251
Christian Heimesbc873412007-12-08 22:11:32 +0000252Extension Modules
253-----------------
254
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000255- Code for itertools ifilter(), imap(), and izip() moved to bultins and
256 renamed to filter(), map(), and zip(). Also, renamed izip_longest()
257 to zip_longest() and ifilterfalse() to filterfalse().
258
Christian Heimes043d6f62008-01-07 17:19:16 +0000259- Issue #1762972: Readded the reload() function as imp.reload()
Guido van Rossumea6775b2008-02-21 20:16:31 +0000260
Christian Heimesa156e092008-02-16 07:38:31 +0000261- Bug #2111: mmap segfaults when trying to write a block opened with PROT_READ
262
263- #2063: correct order of utime and stime in os.times() result on Windows.
Christian Heimesbc873412007-12-08 22:11:32 +0000264
Christian Heimes7131fd92008-02-19 14:21:46 +0000265
Christian Heimesbc873412007-12-08 22:11:32 +0000266Library
267-------
268
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000269- Weakref dictionaries now inherit from MutableMapping.
270 XXX their API still needs to be modernized (i.e. eliminate the iter methods).
271
272- Created new UserDict class in collections module. This one inherits from and
Raymond Hettingerb3a65f82008-02-21 22:11:37 +0000273 complies with the MutableMapping ABC. Also, moved UserString and UserList
274 to the collections module. The MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000275
Guido van Rossumea6775b2008-02-21 20:16:31 +0000276- Removed UserDict.DictMixin. Replaced all its uses with
277 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000278
Guido van Rossume239b002008-01-06 00:44:20 +0000279- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000280
Guido van Rossume239b002008-01-06 00:44:20 +0000281- Issue #1585: IDLE uses non-existent xrange() function.
282
283- Issue #1578: Problems in win_getpass.
284
Georg Brandl52d168a2008-01-07 18:10:24 +0000285Build
286-----
287
288- Renamed --enable-unicode configure flag to --with-wide-unicode, since
289 Unicode strings can't be disabled anymore.
290
291
Guido van Rossume239b002008-01-06 00:44:20 +0000292C API
293-----
294
295- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
296 Py_TYPE and Py_REFCNT.
297
298- New API PyImport_ImportModuleNoBlock(), works like PyImport_ImportModule()
299 but won't block on the import lock (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000300
Christian Heimesbc873412007-12-08 22:11:32 +0000301
Fred Drake0e474a82007-10-11 18:01:43 +0000302What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000303===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000304
Guido van Rossum99533a92007-12-06 05:07:41 +0000305*Release date: 07-Dec-2007*
306
307(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000308
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000309Core and Builtins
310-----------------
311
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000312- str8 now has the same construction signature as bytes.
313
Brett Cannon40430012007-10-22 20:24:51 +0000314- Comparisons between str and str8 now return False/True for ==/!=. sqlite3
315 returns str8 when recreating on object from it's __conform__ value. The
316 struct module returns str8 for all string-related formats. This was true
317 before this change, but becomes more apparent thanks to string comparisons
318 always being False.
319
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000320- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode, buffer,
321 encoding, newline)`
322
323- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
324
325- Changed `__file__` and `co_filename` to unicode. The path names are decoded
326 with `Py_FileSystemDefaultEncoding` and a new API method
327 `PyUnicode_DecodeFSDefault(char*)` was added.
328
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000329- io.open() and _fileio.FileIO have grown a new argument closefd. A false
330 value disables the closing of the file descriptor.
331
Guido van Rossum98297ee2007-11-06 21:34:58 +0000332- Added a new option -b to issues warnings (-bb for errors) about certain
333 operations between bytes/buffer and str like str(b'') and comparsion.
334
Christian Heimes58cb1b82007-11-13 02:19:40 +0000335- The standards streams sys.stdin, stdout and stderr may be None when the
336 when the C runtime library returns an invalid file descriptor for the
337 streams (fileno(stdin) < 0). For now this happens only for Windows GUI
338 apps and scripts started with `pythonw.exe`.
339
Christian Heimesbce52be2007-11-17 19:08:41 +0000340- Added PCbuild9 directory for VS 2008.
341
342- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to work
343 around a name clash with VS 2008 on Windows.
344
Christian Heimesff737952007-11-27 10:40:20 +0000345- Unbound methods are gone for good. ClassObject.method returns an ordinary
346 function object, instance.method still returns a bound method object.
347 The API of bound methods is cleaned up, too. The im_class attribute is
348 removed and im_func + im_self are renamed to __func__ and __self__. The
349 factory PyMethod_New takes only func and instance as argument.
350
Christian Heimesf78b1c62007-12-02 16:52:32 +0000351- intobject.h is no longer included by Python.h. The remains were moved
352 to longobject.h. It still exists to define several aliases from PyInt_
353 to PyLong_ functions.
354
Christian Heimesa37d4c62007-12-04 23:02:19 +0000355- Removed sys.maxint, use sys.maxsize instead.
356
Christian Heimesbce52be2007-11-17 19:08:41 +0000357
Fred Drake0e474a82007-10-11 18:01:43 +0000358Extension Modules
359-----------------
360
361- The `hotshot` profiler has been removed; use `cProfile` instead.
362
363
Brett Cannone9fd2312007-10-12 19:18:19 +0000364Library
365-------
366
367- When loading an external file using testfile(), the passed-in encoding
368 argument was being ignored if __loader__ is defined and forcing the source to
369 be UTF-8.
370
Guido van Rossum687b9c02007-10-25 23:18:51 +0000371- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have been
372 removed in favor of the tempfile module.
373
Christian Heimesc9543e42007-11-28 08:28:28 +0000374- Removed the 'new' module.
375
376- Removed all types from the 'types' module that are easily accessable through
377 builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000378
Georg Brandl52d168a2008-01-07 18:10:24 +0000379
Guido van Rossum4405cf32007-08-30 17:16:55 +0000380What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000381==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000382
Guido van Rossum4405cf32007-08-30 17:16:55 +0000383*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000384
385Core and Builtins
386-----------------
387
Martin v. Löwis47383402007-08-15 07:32:56 +0000388- PEP 3131: Support non-ASCII identifiers.
389
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000390- PEP 3120: Change default encoding to UTF-8.
391
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000392- PEP 3123: Use proper C inheritance for PyObject.
393
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000394- Removed the __oct__ and __hex__ special methods and added a bin()
395 builtin function.
396
397- PEP 3127: octal literals now start with "0o". Old-style octal literals
398 are invalid. There are binary literals with a prefix of "0b".
399 This also affects int(x, 0).
400
Guido van Rossume7ba4952007-06-06 23:52:48 +0000401- None, True, False are now keywords.
402
Guido van Rossum29478ef2007-05-29 00:39:44 +0000403- PEP 3119: isinstance() and issubclass() can be overridden.
404
Guido van Rossumebe3e162007-05-17 18:20:34 +0000405- Remove BaseException.message.
406
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000407- Remove tuple parameter unpacking (PEP 3113).
408
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000409- Remove the f_restricted attribute from frames. This naturally leads to the
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000410 removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
411
Guido van Rossum0368b722007-05-11 16:50:42 +0000412- PEP 3132 was accepted. That means that you can do ``a, *b = range(5)``
413 to assign 0 to a and [1, 2, 3, 4] to b.
414
Guido van Rossum805365e2007-05-07 22:24:25 +0000415- range() now returns an iterator rather than a list. Floats are not allowed.
416 xrange() is no longer defined.
417
Nick Coghlan650f0d02007-04-15 12:05:43 +0000418- Patch #1660500: hide iteration variable in list comps, add set comps
419 and use common code to handle compilation of iterative expressions
420
Guido van Rossume27dc722007-03-27 22:37:34 +0000421- By default, != returns the opposite of ==, unless the latter returns
422 NotImplemented.
423
Collin Winter670e6922007-03-21 02:57:17 +0000424- Patch #1680961: sys.exitfunc has been removed and replaced with a private
425 C-level API.
426
Georg Brandl801dd732007-03-18 20:18:31 +0000427- PEP 3115: new metaclasses: the metaclass is now specified as a
428 keyword arg in the class statement, which can now use the full syntax of
429 a parameter list. Also, the metaclass can implement a __prepare__ function
430 which will be called to create the dictionary for the new class namespace.
431
Georg Brandl428f0642007-03-18 18:35:15 +0000432- The long-deprecated argument "pend" of PyFloat_FromString() has been
433 removed.
434
Georg Brandle32b4222007-03-10 22:13:27 +0000435- The dir() function has been extended to call the __dir__() method on
436 its argument, if it exists. If not, it will work like before. This allows
437 customizing the output of dir() in the presence of a __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000438
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000439- Removed support for __members__ and __methods__.
440
Georg Brandle32b4222007-03-10 22:13:27 +0000441- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000442
Georg Brandle32b4222007-03-10 22:13:27 +0000443- input() became raw_input(): the name input() now implements the
Guido van Rossum0240b922007-02-26 21:23:50 +0000444 functionality formerly known as raw_input(); the name raw_input()
445 is no longer defined.
446
Brett Cannon39590462007-02-26 22:01:14 +0000447- Classes listed in an 'except' clause must inherit from BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000448
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000449- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000450 and .keys(), .items(), .values() return dict views, which behave
451 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000452
Guido van Rossum8b545362007-02-09 23:52:14 +0000453- PEP 3105: print is now a function. Also (not in the PEP) the
454 'softspace' attribute of files is now gone (since print() doesn't use
455 it). A side effect of this change is that you can get incomplete
456 output lines in interactive sessions:
457
458 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000459 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000460
461 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000462
Brett Cannon398db8b2007-01-29 23:44:37 +0000463- PEP 3102: keyword-only arguments.
464
Guido van Rossumd4588c12007-02-13 19:55:23 +0000465- Int/Long unification is complete. The 'long' built-in type
Guido van Rossumec7027f2007-01-30 00:00:40 +0000466 and literals with trailing 'L' or 'l' have been removed.
467 Performance may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000468
469- 'except E, V' must now be spelled as 'except E as V' and deletes V
470 at the end of the except clause; V must be a simple name.
471
Neal Norwitzc1505362006-12-28 06:47:50 +0000472- Added function annotations per PEP 3107.
473
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000474- Added nonlocal declaration from PEP 3104
475
476 >>> def f(x):
477 ... def inc():
478 ... nonlocal x
479 ... x += 1
480 ... return x
481 ... return inc
482 ...
483 >>> inc = f(0)
484 >>> inc()
485 1
486 >>> inc()
487 2
488
Georg Brandl66a796e2006-12-19 20:50:34 +0000489- Moved intern() to sys.intern().
490
491- exec is now a function.
492
493- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000494
Neal Norwitz4886cc32006-08-21 17:06:07 +0000495- Classic classes are a thing of the past. All classes are new style.
496
497- Exceptions *must* derive from BaseException.
498
499- Integer division always returns a float. The -Q option is no more.
500 All the following are gone:
501 * PyNumber_Divide and PyNumber_InPlaceDivide
502 * __div__, __rdiv__, and __idiv__
503 * nb_divide, nb_inplace_divide
504 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
505 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
506 if we want to re-use __div__ and friends. If we do, it will make
507 it harder to write code for both 2.x and 3.x.)
508
509- 'as' and 'with' are keywords.
510
511- Absolute import is the default behavior for 'import foo' etc.
512
Neal Norwitz378b2c92006-08-29 07:57:22 +0000513- Removed support for syntax:
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000514 backticks (ie, `x`), <>
Neal Norwitz378b2c92006-08-29 07:57:22 +0000515
Neal Norwitz4886cc32006-08-21 17:06:07 +0000516- Removed these Python builtins:
Neal Norwitz01688022007-08-12 00:43:29 +0000517 apply(), callable(), coerce(), execfile(), file(), reduce(), reload()
Neal Norwitz4886cc32006-08-21 17:06:07 +0000518
Neal Norwitz378b2c92006-08-29 07:57:22 +0000519- Removed these Python methods:
520 {}.has_key
521
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000522- Removed these opcodes:
523 BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT
524
525- Remove C API support for restricted execution.
526
Guido van Rossumcf1be882007-08-30 22:07:17 +0000527- zip(), map() and filter() now return iterators, behaving like their
528 itertools counterparts. This also affect map()'s behavior on
529 sequences of unequal length -- it now stops after the shortest one
530 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000531
532- Additions:
Guido van Rossumcf1be882007-08-30 22:07:17 +0000533 set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000534
535- Added class decorators per PEP 3129.
536
537
538Extension Modules
539-----------------
540
541- Remove the imageop module. Obsolete long with its unit tests becoming
542 useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000543
544- Removed these attributes from Python modules:
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000545 * operator module: div, idiv, __div__, __idiv__, isCallable, sequenceIncludes
Guido van Rossume7ba4952007-06-06 23:52:48 +0000546 * sys module: exc_clear(), exc_type, exc_value, exc_traceback
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000547
548
549Library
550-------
551
552- Remove the compiler package. Use of the _ast module and (an eventual)
553 AST -> bytecode mechanism.
554
555- Removed these modules:
Guido van Rossum33d26892007-08-05 15:29:28 +0000556 * audiodev, Bastion, bsddb185, exceptions, linuxaudiodev,
557 md5, MimeWriter, mimify, popen2,
558 rexec, sets, sha, stringold, strop, sunaudiodev, timing, xmllib.
559
560- Moved these modules to Tools/Demos:
561 * toaiff
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000562
563- Remove obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL, DEVICE,
564 ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile, IOCTL, jpeg,
565 panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
566
567- Remove obsolete functions:
568 * commands.getstatus(), os.popen*,
569
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000570- Remove functions in the string module that are also string methods;
571 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000572
573- Remove support for long obsolete platforms: plat-aix3, plat-irix5.
574
575- Remove xmlrpclib.SlowParser. It was based on xmllib.
576
577- Patch #1680961: atexit has been reimplemented in C.
578
Walter Dörwald41980ca2007-08-16 21:55:45 +0000579- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
580
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000581
582Build
583-----
584
585C API
586-----
587
588- Removed these Python slots:
589 __coerce__, __div__, __idiv__, __rdiv__
Neal Norwitz4886cc32006-08-21 17:06:07 +0000590
Neal Norwitz4886cc32006-08-21 17:06:07 +0000591- Removed these C APIs:
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000592 PyNumber_Coerce(), PyNumber_CoerceEx(), PyMember_Get, PyMember_Set
Neal Norwitz4886cc32006-08-21 17:06:07 +0000593
594- Removed these C slots/fields:
595 nb_divide, nb_inplace_divide
596
597- Removed these macros:
Neal Norwitz30d1c512007-08-19 22:48:23 +0000598 staticforward, statichere, PyArg_GetInt, PyArg_NoArgs, _PyObject_Del
Neal Norwitz4886cc32006-08-21 17:06:07 +0000599
600- Removed these typedefs:
601 intargfunc, intintargfunc, intobjargproc, intintobjargproc,
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000602 getreadbufferproc, getwritebufferproc, getsegcountproc, getcharbufferproc,
603 memberlist
Neal Norwitz4886cc32006-08-21 17:06:07 +0000604
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000605
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000606Tests
607-----
608
Brett Cannone7a30f72008-03-03 03:36:27 +0000609- Removed test.testall as test.regrtest replaces it.
610
611
Brett Cannonced04e02005-02-13 22:53:22 +0000612Documentation
613-------------
614
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000615Mac
616---
617
Guido van Rossume7ba4952007-06-06 23:52:48 +0000618- The cfmfile was removed.
619
620
Guido van Rossum845702c2007-08-30 18:44:53 +0000621Platforms
622---------
623
624- Support for BeOS and AtheOS was removed (according to PEP 11).
625
626- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
627
Hye-Shik Chang4e422812005-07-17 02:36:59 +0000628
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000629Tools/Demos
630-----------
631
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000632**(For information about older versions, consult the HISTORY file.)**