blob: 75e8be0d4d83d5f365f0acc722e91a9ab47e47ab [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
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +000015- Issue 2798: When parsing arguments with PyArg_ParseTuple, the "s" code now
16 allows any unicode string and returns a utf-8 encoded buffer, just like the
17 "s#" code already does. The "z" code was corrected as well.
18
Mark Dickinsonc4352b02008-05-09 13:55:01 +000019- Issue 2801: fix bug in the float.is_integer method where a ValueError
20 was sometimes incorrectly raised.
21
Benjamin Peterson79629ab2008-05-14 21:07:12 +000022- The --with-toolbox-glue option (and the associated pymactoolbox.h) have been
23 removed.
24
Brett Cannon0d71ee72008-05-08 18:13:40 +000025Extension Modules
26-----------------
27
28Library
29-------
30
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +000031- The ConfigParser module has been renamed to configparser.
32
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +000033- Issue 2865: webbrowser.open() works again in a KDE environment.
34
Brett Cannond3343cb2008-05-12 03:18:21 +000035- The multifile module has been removed.
36
Alexandre Vassalottice261952008-05-12 02:31:37 +000037- The SocketServer module has been renamed to socketserver.
38
Brett Cannon23a4a7b2008-05-12 00:56:28 +000039- Fix the __all__ setting on 'collections' to include UserList and UserString.
40
Brett Cannoncf3520c2008-05-11 22:47:58 +000041- The sre module has been removed.
42
Alexandre Vassalottif260e442008-05-11 19:59:59 +000043- The Queue module has been renamed to queue.
44
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +000045- The copy_reg module has been renamed to copyreg.
46
Brett Cannond8b61ee2008-05-11 03:00:26 +000047- The mhlib module has been removed.
48
Brett Cannonbd474422008-05-10 22:42:14 +000049- The ihooks module has been removed.
50
Brett Cannonb59a2bd2008-05-10 22:03:16 +000051- The fpformat module has been removed.
52
Brett Cannonf4fd9932008-05-10 21:11:46 +000053- The dircache module has been removed.
54
Brett Cannond175b4c2008-05-10 03:19:54 +000055- The Canvas module has been removed.
56
Mark Dickinsonb27406c2008-05-09 13:42:33 +000057- The Decimal module gained the magic methods __round__, __ceil__,
58 __floor__ and __trunc__, to give support for round, math.ceil,
59 math.floor and math.trunc.
60
Brett Cannon900ee3a2008-05-08 20:31:11 +000061- The user module has been removed.
62
Brett Cannon34afe872008-05-08 20:31:44 +000063- The mutex module has been removed.
64
Brett Cannon0d71ee72008-05-08 18:13:40 +000065- The imputil module has been removed.
66
Benjamin Petersond71ca412008-05-08 23:44:58 +000067- os.path.walk has been removed in favor of os.walk
68
Brett Cannon0d71ee72008-05-08 18:13:40 +000069Build
70-----
71
72
Barry Warsaw66079cd2008-04-04 01:36:36 +000073What's New in Python 3.0a5?
74===========================
75
Barry Warsaw9eab8b02008-05-08 13:05:38 +000076*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +000077
78Core and Builtins
79-----------------
80
Mark Dickinson7ab6be22008-04-15 21:42:42 +000081- Fix misbehaviour of PyLong_FromSsize_t on systems where sizeof(size_t) >
82 sizeof(long).
83
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +000084- Issue #2221: Corrected a SystemError "error return without exception set",
85 when the code executed by exec() raises an exception, and sys.stdout.flush()
86 also raises an error.
87
Martin v. Löwis250ad612008-04-07 05:43:42 +000088- Bug #2565: The repr() of type objects now calls them 'class',
89 not 'type' - whether they are builtin types or not.
90
Martin v. Löwis790465f2008-04-05 20:41:37 +000091- The command line processing was converted to pass Unicode strings
92 through as unmodified as possible; as a consequence, the C API
93 related to command line arguments was changed to use wchar_t.
94
Benjamin Petersona2f837f2008-04-28 21:05:10 +000095- All backslashes in raw strings are interpreted literally. This means that
96 '\u' and '\U' escapes are not treated specially.
97
Barry Warsaw66079cd2008-04-04 01:36:36 +000098Extension Modules
99-----------------
100
101Library
102-------
103
Thomas Hellerb041fda2008-04-30 17:11:46 +0000104- ctypes objects now support the PEP3118 buffer interface
105
Thomas Hellere106dc32008-04-24 18:39:36 +0000106- Issue #2682: ctypes callback functions now longer contain a cyclic
107 reference to themselves.
108
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000109- Issue #2058: Remove the buf attribute and add __slots__ to the TarInfo
110 class in order to reduce tarfile's memory usage.
111
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000112- Bug #2606: Avoid calling .sort() on a dict_keys object.
113
Thomas Hellerbff533b2008-04-04 19:53:14 +0000114- The bundled libffi copy is now in sync with the recently released
115 libffi3.0.5 version, apart from some small changes to
116 Modules/_ctypes/libffi/configure.ac.
117
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000118Build
119-----
120
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000121- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
122
Guido van Rossumdc21db32008-04-07 18:37:41 +0000123- "make install" is now an alias for "make altinstall", to prevent
124 accidentally overwriting a Python 2.x installation.
125 Use "make fullinstall" to force Python 3.0 to be installed as
126 "python".
127
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000128- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
129 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000130
Barry Warsawa9d499d2008-03-01 18:38:07 +0000131What's New in Python 3.0a4?
132===========================
133
Barry Warsawbb5cd082008-04-02 23:33:27 +0000134*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000135
Martin v. Löwis25931462008-03-17 20:43:42 +0000136Core and Builtins
137-----------------
138
139- Bug #2301: Don't try decoding the source code into the original
140 encoding for syntax errors.
141
Martin v. Löwis92fab752008-03-08 10:40:41 +0000142Extension Modules
143-----------------
144
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000145- The dl module was removed, use the ctypes module instead.
146
Martin v. Löwis92fab752008-03-08 10:40:41 +0000147- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000148
Martin v. Löwis071ef772008-03-08 11:24:24 +0000149Library
150-------
151
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000152- The class distutils.commands.build_py.build_py_2to3 can be used
153 as a build_py replacement to automatically run 2to3 on modules
154 that are going to be installed.
155
Guido van Rossumf4169812008-03-17 22:56:06 +0000156- A new pickle protocol (protocol 3) is added with explicit support
157 for bytes. This is the default protocol. It intentionally cannot
158 be unpickled by Python 2.x.
159
160- When a pickle written by Python 2.x contains an (8-bit) str
161 instance, this is now decoded to a (Unicode) str instance. The
162 encoding used to do this defaults to ASCII, but can be overridden
163 via two new keyword arguments to the Unpickler class. Previously
164 this would create bytes instances, which is usually wrong: str
165 instances are often used to pickle attribute names etc., and text is
166 more common than binary data anyway.
167
Martin v. Löwis071ef772008-03-08 11:24:24 +0000168- Default to ASCII as the locale.getpreferredencoding, if the POSIX
169 system doesn't support CODESET and LANG isn't set or doesn't
170 allow deduction of an encoding.
171
Gregory P. Smith425136b2008-03-17 20:45:21 +0000172- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned value.
173
Trent Nelson428de652008-03-18 22:41:35 +0000174- Issue #719888: Updated tokenize to use a bytes API. generate_tokens has been
175 renamed tokenize and now works with bytes rather than strings. A new
176 detect_encoding function has been added for determining source file encoding
177 according to PEP-0263. Token sequences returned by tokenize always start
178 with an ENCODING token which specifies the encoding used to decode the file.
179 This token is used to encode the output of untokenize back to bytes.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000180
Christian Heimesbc873412007-12-08 22:11:32 +0000181What's New in Python 3.0a3?
182===========================
183
Barry Warsaw659fc422008-03-01 17:45:23 +0000184*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000185
186Core and Builtins
187-----------------
188
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000189- Issue #2282: io.TextIOWrapper was not overriding seekable() from io.IOBase.
190
Benjamin Petersonec79aad2008-04-02 22:44:10 +0000191- Issue #2115: Important speedup in setting __slot__ attributes. Also
192 prevent a possible crash: an Abstract Base Class would try to access a slot
Christian Heimesa156e092008-02-16 07:38:31 +0000193 on a registered virtual subclass.
194
195- Fixed repr() and str() of complex numbers with infinity or nan as real or
196 imaginary part.
197
198- Clear all free list during a gc.collect() of the highest generation in order
199 to allow pymalloc to free more arenas. Python may give back memory to the
200 OS earlier.
201
202- Issue #2045: Fix an infinite recursion triggered when printing a subclass of
203 collections.defaultdict, if its default_factory is set to a bound method.
204
205- Fixed a minor memory leak in dictobject.c. The content of the free
206 list was not freed on interpreter shutdown.
207
208- Limit free list of method and builtin function objects to 256 entries
209 each.
210
211- Patch #1953: Added ``sys._compact_freelists()`` and the C API functions
212 ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
213 to compact the internal free lists of pre-allocted ints and floats.
214
215- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
216 Python expected the return type int but the fork familie returns pi_t.
217
218- Issue #1678380: Fix a bug that identifies 0j and -0j when they appear
219 in the same code unit.
220
Raymond Hettinger65baa342008-02-07 00:41:02 +0000221- Issue #2025 : Add tuple.count() and tuple.index() methods to comply with
222 the collections.Sequence API.
223
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000224- Fixed multiple reinitialization of the Python interpreter. The small int
225 list in longobject.c has caused a seg fault during the third finalization.
226
Christian Heimesc04dac02008-01-30 11:27:57 +0000227- Issue #1973: bytes.fromhex('') raises SystemError
228
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000229- Issue #1771: remove cmp parameter from sorted() and list.sort()
230
Christian Heimes7b876152008-01-30 09:51:48 +0000231- Issue #1969: split and rsplit in bytearray are inconsistent
232
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000233- map() and no longer accepts None for the first argument.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000234 Use zip() instead.
235
Facundo Batista2336bdd2008-01-19 19:12:01 +0000236- Issue #1769: Now int("- 1") is not allowed any more.
237
Christian Heimes386cd1e2008-01-15 02:01:20 +0000238- Object/longobject.c: long(float('nan')) raises an OverflowError instead
239 of returning 0.
240
Christian Heimes3b06e532008-01-07 20:12:44 +0000241- Issue #1762972: __file__ points to the source file instead of the pyc/pyo
242 file if the py file exists.
243
Guido van Rossumab078dd2008-01-06 00:09:11 +0000244- Issue #1393: object_richcompare() returns NotImplemented instead of
245 False if the objects aren't equal, to give the other side a chance.
246
Guido van Rossume239b002008-01-06 00:44:20 +0000247- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000248
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000249- Improve some exception messages when Windows fails to load an extension
250 module. Now we get for example '%1 is not a valid Win32 application' instead
251 of 'error code 193'. Also use Unicode strings to deal with non-English
252 locales.
253
Christian Heimesa3534a62007-12-11 19:56:40 +0000254- Issue #1587: Added instancemethod wrapper for PyCFunctions. The Python C API
255 has gained a new type *PyInstanceMethod_Type* and the functions
256 *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)* and
257 *PyInstanceMethod_Function(im)*.
258
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000259- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed from the
260 gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE are now enough to
261 print the corresponding list of objects considered by the garbage collector.
262
Guido van Rossume239b002008-01-06 00:44:20 +0000263- Issue #1573: Improper use of the keyword-only syntax makes the parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000264
Christian Heimes0ded5b52007-12-10 15:50:56 +0000265- Issue #1564: The set implementation should special-case PyUnicode instead
Guido van Rossume239b002008-01-06 00:44:20 +0000266 of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000267
Guido van Rossumea6775b2008-02-21 20:16:31 +0000268- Patch #1031213: Decode source line in SyntaxErrors back to its
269 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000270
Christian Heimes09aaa882008-02-23 15:01:06 +0000271- inspect.getsource() includes the decorators again.
272
Guido van Rossumea6775b2008-02-21 20:16:31 +0000273- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
274 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000275
Christian Heimes7131fd92008-02-19 14:21:46 +0000276- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when the
Guido van Rossumea6775b2008-02-21 20:16:31 +0000277 first chunk fed to the decoder started with a BOM, but was longer than 3
278 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000279
Christian Heimes7131fd92008-02-19 14:21:46 +0000280
Christian Heimesbc873412007-12-08 22:11:32 +0000281Extension Modules
282-----------------
283
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000284- Code for itertools ifilter(), imap(), and izip() moved to bultins and
285 renamed to filter(), map(), and zip(). Also, renamed izip_longest()
286 to zip_longest() and ifilterfalse() to filterfalse().
287
Christian Heimes043d6f62008-01-07 17:19:16 +0000288- Issue #1762972: Readded the reload() function as imp.reload()
Guido van Rossumea6775b2008-02-21 20:16:31 +0000289
Christian Heimesa156e092008-02-16 07:38:31 +0000290- Bug #2111: mmap segfaults when trying to write a block opened with PROT_READ
291
292- #2063: correct order of utime and stime in os.times() result on Windows.
Christian Heimesbc873412007-12-08 22:11:32 +0000293
Christian Heimes7131fd92008-02-19 14:21:46 +0000294
Christian Heimesbc873412007-12-08 22:11:32 +0000295Library
296-------
297
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000298- Weakref dictionaries now inherit from MutableMapping.
299 XXX their API still needs to be modernized (i.e. eliminate the iter methods).
300
301- Created new UserDict class in collections module. This one inherits from and
Raymond Hettingerb3a65f82008-02-21 22:11:37 +0000302 complies with the MutableMapping ABC. Also, moved UserString and UserList
303 to the collections module. The MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000304
Guido van Rossumea6775b2008-02-21 20:16:31 +0000305- Removed UserDict.DictMixin. Replaced all its uses with
306 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000307
Guido van Rossume239b002008-01-06 00:44:20 +0000308- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000309
Guido van Rossume239b002008-01-06 00:44:20 +0000310- Issue #1585: IDLE uses non-existent xrange() function.
311
312- Issue #1578: Problems in win_getpass.
313
Georg Brandl52d168a2008-01-07 18:10:24 +0000314Build
315-----
316
317- Renamed --enable-unicode configure flag to --with-wide-unicode, since
318 Unicode strings can't be disabled anymore.
319
320
Guido van Rossume239b002008-01-06 00:44:20 +0000321C API
322-----
323
324- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
325 Py_TYPE and Py_REFCNT.
326
327- New API PyImport_ImportModuleNoBlock(), works like PyImport_ImportModule()
328 but won't block on the import lock (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000329
Christian Heimesbc873412007-12-08 22:11:32 +0000330
Fred Drake0e474a82007-10-11 18:01:43 +0000331What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000332===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000333
Guido van Rossum99533a92007-12-06 05:07:41 +0000334*Release date: 07-Dec-2007*
335
336(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000337
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000338Core and Builtins
339-----------------
340
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000341- str8 now has the same construction signature as bytes.
342
Brett Cannon40430012007-10-22 20:24:51 +0000343- Comparisons between str and str8 now return False/True for ==/!=. sqlite3
344 returns str8 when recreating on object from it's __conform__ value. The
345 struct module returns str8 for all string-related formats. This was true
346 before this change, but becomes more apparent thanks to string comparisons
347 always being False.
348
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000349- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode, buffer,
350 encoding, newline)`
351
352- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
353
354- Changed `__file__` and `co_filename` to unicode. The path names are decoded
355 with `Py_FileSystemDefaultEncoding` and a new API method
356 `PyUnicode_DecodeFSDefault(char*)` was added.
357
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000358- io.open() and _fileio.FileIO have grown a new argument closefd. A false
359 value disables the closing of the file descriptor.
360
Guido van Rossum98297ee2007-11-06 21:34:58 +0000361- Added a new option -b to issues warnings (-bb for errors) about certain
362 operations between bytes/buffer and str like str(b'') and comparsion.
363
Christian Heimes58cb1b82007-11-13 02:19:40 +0000364- The standards streams sys.stdin, stdout and stderr may be None when the
365 when the C runtime library returns an invalid file descriptor for the
366 streams (fileno(stdin) < 0). For now this happens only for Windows GUI
367 apps and scripts started with `pythonw.exe`.
368
Christian Heimesbce52be2007-11-17 19:08:41 +0000369- Added PCbuild9 directory for VS 2008.
370
371- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to work
372 around a name clash with VS 2008 on Windows.
373
Christian Heimesff737952007-11-27 10:40:20 +0000374- Unbound methods are gone for good. ClassObject.method returns an ordinary
375 function object, instance.method still returns a bound method object.
376 The API of bound methods is cleaned up, too. The im_class attribute is
377 removed and im_func + im_self are renamed to __func__ and __self__. The
378 factory PyMethod_New takes only func and instance as argument.
379
Christian Heimesf78b1c62007-12-02 16:52:32 +0000380- intobject.h is no longer included by Python.h. The remains were moved
381 to longobject.h. It still exists to define several aliases from PyInt_
382 to PyLong_ functions.
383
Christian Heimesa37d4c62007-12-04 23:02:19 +0000384- Removed sys.maxint, use sys.maxsize instead.
385
Christian Heimesbce52be2007-11-17 19:08:41 +0000386
Fred Drake0e474a82007-10-11 18:01:43 +0000387Extension Modules
388-----------------
389
390- The `hotshot` profiler has been removed; use `cProfile` instead.
391
392
Brett Cannone9fd2312007-10-12 19:18:19 +0000393Library
394-------
395
396- When loading an external file using testfile(), the passed-in encoding
397 argument was being ignored if __loader__ is defined and forcing the source to
398 be UTF-8.
399
Guido van Rossum687b9c02007-10-25 23:18:51 +0000400- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have been
401 removed in favor of the tempfile module.
402
Christian Heimesc9543e42007-11-28 08:28:28 +0000403- Removed the 'new' module.
404
405- Removed all types from the 'types' module that are easily accessable through
406 builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000407
Georg Brandl52d168a2008-01-07 18:10:24 +0000408
Guido van Rossum4405cf32007-08-30 17:16:55 +0000409What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000410==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000411
Guido van Rossum4405cf32007-08-30 17:16:55 +0000412*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000413
414Core and Builtins
415-----------------
416
Martin v. Löwis47383402007-08-15 07:32:56 +0000417- PEP 3131: Support non-ASCII identifiers.
418
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000419- PEP 3120: Change default encoding to UTF-8.
420
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000421- PEP 3123: Use proper C inheritance for PyObject.
422
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000423- Removed the __oct__ and __hex__ special methods and added a bin()
424 builtin function.
425
426- PEP 3127: octal literals now start with "0o". Old-style octal literals
427 are invalid. There are binary literals with a prefix of "0b".
428 This also affects int(x, 0).
429
Guido van Rossume7ba4952007-06-06 23:52:48 +0000430- None, True, False are now keywords.
431
Guido van Rossum29478ef2007-05-29 00:39:44 +0000432- PEP 3119: isinstance() and issubclass() can be overridden.
433
Guido van Rossumebe3e162007-05-17 18:20:34 +0000434- Remove BaseException.message.
435
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000436- Remove tuple parameter unpacking (PEP 3113).
437
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000438- Remove the f_restricted attribute from frames. This naturally leads to the
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000439 removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
440
Guido van Rossum0368b722007-05-11 16:50:42 +0000441- PEP 3132 was accepted. That means that you can do ``a, *b = range(5)``
442 to assign 0 to a and [1, 2, 3, 4] to b.
443
Guido van Rossum805365e2007-05-07 22:24:25 +0000444- range() now returns an iterator rather than a list. Floats are not allowed.
445 xrange() is no longer defined.
446
Nick Coghlan650f0d02007-04-15 12:05:43 +0000447- Patch #1660500: hide iteration variable in list comps, add set comps
448 and use common code to handle compilation of iterative expressions
449
Guido van Rossume27dc722007-03-27 22:37:34 +0000450- By default, != returns the opposite of ==, unless the latter returns
451 NotImplemented.
452
Collin Winter670e6922007-03-21 02:57:17 +0000453- Patch #1680961: sys.exitfunc has been removed and replaced with a private
454 C-level API.
455
Georg Brandl801dd732007-03-18 20:18:31 +0000456- PEP 3115: new metaclasses: the metaclass is now specified as a
457 keyword arg in the class statement, which can now use the full syntax of
458 a parameter list. Also, the metaclass can implement a __prepare__ function
459 which will be called to create the dictionary for the new class namespace.
460
Georg Brandl428f0642007-03-18 18:35:15 +0000461- The long-deprecated argument "pend" of PyFloat_FromString() has been
462 removed.
463
Georg Brandle32b4222007-03-10 22:13:27 +0000464- The dir() function has been extended to call the __dir__() method on
465 its argument, if it exists. If not, it will work like before. This allows
466 customizing the output of dir() in the presence of a __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000467
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000468- Removed support for __members__ and __methods__.
469
Georg Brandle32b4222007-03-10 22:13:27 +0000470- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000471
Georg Brandle32b4222007-03-10 22:13:27 +0000472- input() became raw_input(): the name input() now implements the
Guido van Rossum0240b922007-02-26 21:23:50 +0000473 functionality formerly known as raw_input(); the name raw_input()
474 is no longer defined.
475
Brett Cannon39590462007-02-26 22:01:14 +0000476- Classes listed in an 'except' clause must inherit from BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000477
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000478- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000479 and .keys(), .items(), .values() return dict views, which behave
480 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000481
Guido van Rossum8b545362007-02-09 23:52:14 +0000482- PEP 3105: print is now a function. Also (not in the PEP) the
483 'softspace' attribute of files is now gone (since print() doesn't use
484 it). A side effect of this change is that you can get incomplete
485 output lines in interactive sessions:
486
487 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000488 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000489
490 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000491
Brett Cannon398db8b2007-01-29 23:44:37 +0000492- PEP 3102: keyword-only arguments.
493
Guido van Rossumd4588c12007-02-13 19:55:23 +0000494- Int/Long unification is complete. The 'long' built-in type
Guido van Rossumec7027f2007-01-30 00:00:40 +0000495 and literals with trailing 'L' or 'l' have been removed.
496 Performance may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000497
498- 'except E, V' must now be spelled as 'except E as V' and deletes V
499 at the end of the except clause; V must be a simple name.
500
Neal Norwitzc1505362006-12-28 06:47:50 +0000501- Added function annotations per PEP 3107.
502
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000503- Added nonlocal declaration from PEP 3104
504
505 >>> def f(x):
506 ... def inc():
507 ... nonlocal x
508 ... x += 1
509 ... return x
510 ... return inc
511 ...
512 >>> inc = f(0)
513 >>> inc()
514 1
515 >>> inc()
516 2
517
Georg Brandl66a796e2006-12-19 20:50:34 +0000518- Moved intern() to sys.intern().
519
520- exec is now a function.
521
522- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000523
Neal Norwitz4886cc32006-08-21 17:06:07 +0000524- Classic classes are a thing of the past. All classes are new style.
525
526- Exceptions *must* derive from BaseException.
527
528- Integer division always returns a float. The -Q option is no more.
529 All the following are gone:
530 * PyNumber_Divide and PyNumber_InPlaceDivide
531 * __div__, __rdiv__, and __idiv__
532 * nb_divide, nb_inplace_divide
533 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
534 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
535 if we want to re-use __div__ and friends. If we do, it will make
536 it harder to write code for both 2.x and 3.x.)
537
538- 'as' and 'with' are keywords.
539
540- Absolute import is the default behavior for 'import foo' etc.
541
Neal Norwitz378b2c92006-08-29 07:57:22 +0000542- Removed support for syntax:
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000543 backticks (ie, `x`), <>
Neal Norwitz378b2c92006-08-29 07:57:22 +0000544
Neal Norwitz4886cc32006-08-21 17:06:07 +0000545- Removed these Python builtins:
Neal Norwitz01688022007-08-12 00:43:29 +0000546 apply(), callable(), coerce(), execfile(), file(), reduce(), reload()
Neal Norwitz4886cc32006-08-21 17:06:07 +0000547
Neal Norwitz378b2c92006-08-29 07:57:22 +0000548- Removed these Python methods:
549 {}.has_key
550
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000551- Removed these opcodes:
552 BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT
553
554- Remove C API support for restricted execution.
555
Guido van Rossumcf1be882007-08-30 22:07:17 +0000556- zip(), map() and filter() now return iterators, behaving like their
557 itertools counterparts. This also affect map()'s behavior on
558 sequences of unequal length -- it now stops after the shortest one
559 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000560
561- Additions:
Guido van Rossumcf1be882007-08-30 22:07:17 +0000562 set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000563
564- Added class decorators per PEP 3129.
565
566
567Extension Modules
568-----------------
569
570- Remove the imageop module. Obsolete long with its unit tests becoming
571 useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000572
573- Removed these attributes from Python modules:
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000574 * operator module: div, idiv, __div__, __idiv__, isCallable, sequenceIncludes
Guido van Rossume7ba4952007-06-06 23:52:48 +0000575 * sys module: exc_clear(), exc_type, exc_value, exc_traceback
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000576
577
578Library
579-------
580
581- Remove the compiler package. Use of the _ast module and (an eventual)
582 AST -> bytecode mechanism.
583
584- Removed these modules:
Guido van Rossum33d26892007-08-05 15:29:28 +0000585 * audiodev, Bastion, bsddb185, exceptions, linuxaudiodev,
586 md5, MimeWriter, mimify, popen2,
587 rexec, sets, sha, stringold, strop, sunaudiodev, timing, xmllib.
588
589- Moved these modules to Tools/Demos:
590 * toaiff
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000591
592- Remove obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL, DEVICE,
593 ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile, IOCTL, jpeg,
594 panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
595
596- Remove obsolete functions:
597 * commands.getstatus(), os.popen*,
598
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000599- Remove functions in the string module that are also string methods;
600 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000601
602- Remove support for long obsolete platforms: plat-aix3, plat-irix5.
603
604- Remove xmlrpclib.SlowParser. It was based on xmllib.
605
606- Patch #1680961: atexit has been reimplemented in C.
607
Walter Dörwald41980ca2007-08-16 21:55:45 +0000608- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
609
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000610
611Build
612-----
613
614C API
615-----
616
617- Removed these Python slots:
618 __coerce__, __div__, __idiv__, __rdiv__
Neal Norwitz4886cc32006-08-21 17:06:07 +0000619
Neal Norwitz4886cc32006-08-21 17:06:07 +0000620- Removed these C APIs:
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000621 PyNumber_Coerce(), PyNumber_CoerceEx(), PyMember_Get, PyMember_Set
Neal Norwitz4886cc32006-08-21 17:06:07 +0000622
623- Removed these C slots/fields:
624 nb_divide, nb_inplace_divide
625
626- Removed these macros:
Neal Norwitz30d1c512007-08-19 22:48:23 +0000627 staticforward, statichere, PyArg_GetInt, PyArg_NoArgs, _PyObject_Del
Neal Norwitz4886cc32006-08-21 17:06:07 +0000628
629- Removed these typedefs:
630 intargfunc, intintargfunc, intobjargproc, intintobjargproc,
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000631 getreadbufferproc, getwritebufferproc, getsegcountproc, getcharbufferproc,
632 memberlist
Neal Norwitz4886cc32006-08-21 17:06:07 +0000633
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000634
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000635Tests
636-----
637
Brett Cannone7a30f72008-03-03 03:36:27 +0000638- Removed test.testall as test.regrtest replaces it.
639
640
Brett Cannonced04e02005-02-13 22:53:22 +0000641Documentation
642-------------
643
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000644Mac
645---
646
Guido van Rossume7ba4952007-06-06 23:52:48 +0000647- The cfmfile was removed.
648
649
Guido van Rossum845702c2007-08-30 18:44:53 +0000650Platforms
651---------
652
653- Support for BeOS and AtheOS was removed (according to PEP 11).
654
655- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
656
Hye-Shik Chang4e422812005-07-17 02:36:59 +0000657
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000658Tools/Demos
659-----------
660
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000661**(For information about older versions, consult the HISTORY file.)**