blob: 327c19939b522c6a13e299aa0a2c992f889b0f59 [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
Martin v. Löwis250ad612008-04-07 05:43:42 +000015- Bug #2565: The repr() of type objects now calls them 'class',
16 not 'type' - whether they are builtin types or not.
17
Martin v. Löwis790465f2008-04-05 20:41:37 +000018- The command line processing was converted to pass Unicode strings
19 through as unmodified as possible; as a consequence, the C API
20 related to command line arguments was changed to use wchar_t.
21
Barry Warsaw66079cd2008-04-04 01:36:36 +000022Extension Modules
23-----------------
24
25Library
26-------
27
Thomas Hellerbff533b2008-04-04 19:53:14 +000028- The bundled libffi copy is now in sync with the recently released
29 libffi3.0.5 version, apart from some small changes to
30 Modules/_ctypes/libffi/configure.ac.
31
Thomas Hellerf44b9a12008-04-04 10:18:23 +000032Build
33-----
34
35- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
36 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +000037
Barry Warsawa9d499d2008-03-01 18:38:07 +000038What's New in Python 3.0a4?
39===========================
40
Barry Warsawbb5cd082008-04-02 23:33:27 +000041*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +000042
Martin v. Löwis25931462008-03-17 20:43:42 +000043Core and Builtins
44-----------------
45
46- Bug #2301: Don't try decoding the source code into the original
47 encoding for syntax errors.
48
Martin v. Löwis92fab752008-03-08 10:40:41 +000049Extension Modules
50-----------------
51
Neal Norwitz6cf49cf2008-03-24 06:22:57 +000052- The dl module was removed, use the ctypes module instead.
53
Martin v. Löwis92fab752008-03-08 10:40:41 +000054- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +000055
Martin v. Löwis071ef772008-03-08 11:24:24 +000056Library
57-------
58
Martin v. Löwis73a22f02008-03-22 00:35:10 +000059- The class distutils.commands.build_py.build_py_2to3 can be used
60 as a build_py replacement to automatically run 2to3 on modules
61 that are going to be installed.
62
Guido van Rossumf4169812008-03-17 22:56:06 +000063- A new pickle protocol (protocol 3) is added with explicit support
64 for bytes. This is the default protocol. It intentionally cannot
65 be unpickled by Python 2.x.
66
67- When a pickle written by Python 2.x contains an (8-bit) str
68 instance, this is now decoded to a (Unicode) str instance. The
69 encoding used to do this defaults to ASCII, but can be overridden
70 via two new keyword arguments to the Unpickler class. Previously
71 this would create bytes instances, which is usually wrong: str
72 instances are often used to pickle attribute names etc., and text is
73 more common than binary data anyway.
74
Martin v. Löwis071ef772008-03-08 11:24:24 +000075- Default to ASCII as the locale.getpreferredencoding, if the POSIX
76 system doesn't support CODESET and LANG isn't set or doesn't
77 allow deduction of an encoding.
78
Gregory P. Smith425136b2008-03-17 20:45:21 +000079- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned value.
80
Trent Nelson428de652008-03-18 22:41:35 +000081- Issue #719888: Updated tokenize to use a bytes API. generate_tokens has been
82 renamed tokenize and now works with bytes rather than strings. A new
83 detect_encoding function has been added for determining source file encoding
84 according to PEP-0263. Token sequences returned by tokenize always start
85 with an ENCODING token which specifies the encoding used to decode the file.
86 This token is used to encode the output of untokenize back to bytes.
Barry Warsawa9d499d2008-03-01 18:38:07 +000087
Christian Heimesbc873412007-12-08 22:11:32 +000088What's New in Python 3.0a3?
89===========================
90
Barry Warsaw659fc422008-03-01 17:45:23 +000091*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +000092
93Core and Builtins
94-----------------
95
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +000096- Issue #2282: io.TextIOWrapper was not overriding seekable() from io.IOBase.
97
Benjamin Petersonec79aad2008-04-02 22:44:10 +000098- Issue #2115: Important speedup in setting __slot__ attributes. Also
99 prevent a possible crash: an Abstract Base Class would try to access a slot
Christian Heimesa156e092008-02-16 07:38:31 +0000100 on a registered virtual subclass.
101
102- Fixed repr() and str() of complex numbers with infinity or nan as real or
103 imaginary part.
104
105- Clear all free list during a gc.collect() of the highest generation in order
106 to allow pymalloc to free more arenas. Python may give back memory to the
107 OS earlier.
108
109- Issue #2045: Fix an infinite recursion triggered when printing a subclass of
110 collections.defaultdict, if its default_factory is set to a bound method.
111
112- Fixed a minor memory leak in dictobject.c. The content of the free
113 list was not freed on interpreter shutdown.
114
115- Limit free list of method and builtin function objects to 256 entries
116 each.
117
118- Patch #1953: Added ``sys._compact_freelists()`` and the C API functions
119 ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
120 to compact the internal free lists of pre-allocted ints and floats.
121
122- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
123 Python expected the return type int but the fork familie returns pi_t.
124
125- Issue #1678380: Fix a bug that identifies 0j and -0j when they appear
126 in the same code unit.
127
Raymond Hettinger65baa342008-02-07 00:41:02 +0000128- Issue #2025 : Add tuple.count() and tuple.index() methods to comply with
129 the collections.Sequence API.
130
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000131- Fixed multiple reinitialization of the Python interpreter. The small int
132 list in longobject.c has caused a seg fault during the third finalization.
133
Christian Heimesc04dac02008-01-30 11:27:57 +0000134- Issue #1973: bytes.fromhex('') raises SystemError
135
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000136- Issue #1771: remove cmp parameter from sorted() and list.sort()
137
Christian Heimes7b876152008-01-30 09:51:48 +0000138- Issue #1969: split and rsplit in bytearray are inconsistent
139
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000140- map() and no longer accepts None for the first argument.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000141 Use zip() instead.
142
Facundo Batista2336bdd2008-01-19 19:12:01 +0000143- Issue #1769: Now int("- 1") is not allowed any more.
144
Christian Heimes386cd1e2008-01-15 02:01:20 +0000145- Object/longobject.c: long(float('nan')) raises an OverflowError instead
146 of returning 0.
147
Christian Heimes3b06e532008-01-07 20:12:44 +0000148- Issue #1762972: __file__ points to the source file instead of the pyc/pyo
149 file if the py file exists.
150
Guido van Rossumab078dd2008-01-06 00:09:11 +0000151- Issue #1393: object_richcompare() returns NotImplemented instead of
152 False if the objects aren't equal, to give the other side a chance.
153
Guido van Rossume239b002008-01-06 00:44:20 +0000154- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000155
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000156- Improve some exception messages when Windows fails to load an extension
157 module. Now we get for example '%1 is not a valid Win32 application' instead
158 of 'error code 193'. Also use Unicode strings to deal with non-English
159 locales.
160
Christian Heimesa3534a62007-12-11 19:56:40 +0000161- Issue #1587: Added instancemethod wrapper for PyCFunctions. The Python C API
162 has gained a new type *PyInstanceMethod_Type* and the functions
163 *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)* and
164 *PyInstanceMethod_Function(im)*.
165
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000166- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed from the
167 gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE are now enough to
168 print the corresponding list of objects considered by the garbage collector.
169
Guido van Rossume239b002008-01-06 00:44:20 +0000170- Issue #1573: Improper use of the keyword-only syntax makes the parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000171
Christian Heimes0ded5b52007-12-10 15:50:56 +0000172- Issue #1564: The set implementation should special-case PyUnicode instead
Guido van Rossume239b002008-01-06 00:44:20 +0000173 of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000174
Guido van Rossumea6775b2008-02-21 20:16:31 +0000175- Patch #1031213: Decode source line in SyntaxErrors back to its
176 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000177
Christian Heimes09aaa882008-02-23 15:01:06 +0000178- inspect.getsource() includes the decorators again.
179
Guido van Rossumea6775b2008-02-21 20:16:31 +0000180- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
181 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000182
Christian Heimes7131fd92008-02-19 14:21:46 +0000183- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when the
Guido van Rossumea6775b2008-02-21 20:16:31 +0000184 first chunk fed to the decoder started with a BOM, but was longer than 3
185 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000186
Christian Heimes7131fd92008-02-19 14:21:46 +0000187
Christian Heimesbc873412007-12-08 22:11:32 +0000188Extension Modules
189-----------------
190
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000191- Code for itertools ifilter(), imap(), and izip() moved to bultins and
192 renamed to filter(), map(), and zip(). Also, renamed izip_longest()
193 to zip_longest() and ifilterfalse() to filterfalse().
194
Christian Heimes043d6f62008-01-07 17:19:16 +0000195- Issue #1762972: Readded the reload() function as imp.reload()
Guido van Rossumea6775b2008-02-21 20:16:31 +0000196
Christian Heimesa156e092008-02-16 07:38:31 +0000197- Bug #2111: mmap segfaults when trying to write a block opened with PROT_READ
198
199- #2063: correct order of utime and stime in os.times() result on Windows.
Christian Heimesbc873412007-12-08 22:11:32 +0000200
Christian Heimes7131fd92008-02-19 14:21:46 +0000201
Christian Heimesbc873412007-12-08 22:11:32 +0000202Library
203-------
204
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000205- Weakref dictionaries now inherit from MutableMapping.
206 XXX their API still needs to be modernized (i.e. eliminate the iter methods).
207
208- Created new UserDict class in collections module. This one inherits from and
Raymond Hettingerb3a65f82008-02-21 22:11:37 +0000209 complies with the MutableMapping ABC. Also, moved UserString and UserList
210 to the collections module. The MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000211
Guido van Rossumea6775b2008-02-21 20:16:31 +0000212- Removed UserDict.DictMixin. Replaced all its uses with
213 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000214
Guido van Rossume239b002008-01-06 00:44:20 +0000215- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000216
Guido van Rossume239b002008-01-06 00:44:20 +0000217- Issue #1585: IDLE uses non-existent xrange() function.
218
219- Issue #1578: Problems in win_getpass.
220
Georg Brandl52d168a2008-01-07 18:10:24 +0000221Build
222-----
223
224- Renamed --enable-unicode configure flag to --with-wide-unicode, since
225 Unicode strings can't be disabled anymore.
226
227
Guido van Rossume239b002008-01-06 00:44:20 +0000228C API
229-----
230
231- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
232 Py_TYPE and Py_REFCNT.
233
234- New API PyImport_ImportModuleNoBlock(), works like PyImport_ImportModule()
235 but won't block on the import lock (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000236
Christian Heimesbc873412007-12-08 22:11:32 +0000237
Fred Drake0e474a82007-10-11 18:01:43 +0000238What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000239===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000240
Guido van Rossum99533a92007-12-06 05:07:41 +0000241*Release date: 07-Dec-2007*
242
243(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000244
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000245Core and Builtins
246-----------------
247
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000248- str8 now has the same construction signature as bytes.
249
Brett Cannon40430012007-10-22 20:24:51 +0000250- Comparisons between str and str8 now return False/True for ==/!=. sqlite3
251 returns str8 when recreating on object from it's __conform__ value. The
252 struct module returns str8 for all string-related formats. This was true
253 before this change, but becomes more apparent thanks to string comparisons
254 always being False.
255
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000256- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode, buffer,
257 encoding, newline)`
258
259- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
260
261- Changed `__file__` and `co_filename` to unicode. The path names are decoded
262 with `Py_FileSystemDefaultEncoding` and a new API method
263 `PyUnicode_DecodeFSDefault(char*)` was added.
264
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000265- io.open() and _fileio.FileIO have grown a new argument closefd. A false
266 value disables the closing of the file descriptor.
267
Guido van Rossum98297ee2007-11-06 21:34:58 +0000268- Added a new option -b to issues warnings (-bb for errors) about certain
269 operations between bytes/buffer and str like str(b'') and comparsion.
270
Christian Heimes58cb1b82007-11-13 02:19:40 +0000271- The standards streams sys.stdin, stdout and stderr may be None when the
272 when the C runtime library returns an invalid file descriptor for the
273 streams (fileno(stdin) < 0). For now this happens only for Windows GUI
274 apps and scripts started with `pythonw.exe`.
275
Christian Heimesbce52be2007-11-17 19:08:41 +0000276- Added PCbuild9 directory for VS 2008.
277
278- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to work
279 around a name clash with VS 2008 on Windows.
280
Christian Heimesff737952007-11-27 10:40:20 +0000281- Unbound methods are gone for good. ClassObject.method returns an ordinary
282 function object, instance.method still returns a bound method object.
283 The API of bound methods is cleaned up, too. The im_class attribute is
284 removed and im_func + im_self are renamed to __func__ and __self__. The
285 factory PyMethod_New takes only func and instance as argument.
286
Christian Heimesf78b1c62007-12-02 16:52:32 +0000287- intobject.h is no longer included by Python.h. The remains were moved
288 to longobject.h. It still exists to define several aliases from PyInt_
289 to PyLong_ functions.
290
Christian Heimesa37d4c62007-12-04 23:02:19 +0000291- Removed sys.maxint, use sys.maxsize instead.
292
Christian Heimesbce52be2007-11-17 19:08:41 +0000293
Fred Drake0e474a82007-10-11 18:01:43 +0000294Extension Modules
295-----------------
296
297- The `hotshot` profiler has been removed; use `cProfile` instead.
298
299
Brett Cannone9fd2312007-10-12 19:18:19 +0000300Library
301-------
302
303- When loading an external file using testfile(), the passed-in encoding
304 argument was being ignored if __loader__ is defined and forcing the source to
305 be UTF-8.
306
Guido van Rossum687b9c02007-10-25 23:18:51 +0000307- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have been
308 removed in favor of the tempfile module.
309
Christian Heimesc9543e42007-11-28 08:28:28 +0000310- Removed the 'new' module.
311
312- Removed all types from the 'types' module that are easily accessable through
313 builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000314
Georg Brandl52d168a2008-01-07 18:10:24 +0000315
Guido van Rossum4405cf32007-08-30 17:16:55 +0000316What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000317==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000318
Guido van Rossum4405cf32007-08-30 17:16:55 +0000319*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000320
321Core and Builtins
322-----------------
323
Martin v. Löwis47383402007-08-15 07:32:56 +0000324- PEP 3131: Support non-ASCII identifiers.
325
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000326- PEP 3120: Change default encoding to UTF-8.
327
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000328- PEP 3123: Use proper C inheritance for PyObject.
329
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000330- Removed the __oct__ and __hex__ special methods and added a bin()
331 builtin function.
332
333- PEP 3127: octal literals now start with "0o". Old-style octal literals
334 are invalid. There are binary literals with a prefix of "0b".
335 This also affects int(x, 0).
336
Guido van Rossume7ba4952007-06-06 23:52:48 +0000337- None, True, False are now keywords.
338
Guido van Rossum29478ef2007-05-29 00:39:44 +0000339- PEP 3119: isinstance() and issubclass() can be overridden.
340
Guido van Rossumebe3e162007-05-17 18:20:34 +0000341- Remove BaseException.message.
342
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000343- Remove tuple parameter unpacking (PEP 3113).
344
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000345- Remove the f_restricted attribute from frames. This naturally leads to the
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000346 removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
347
Guido van Rossum0368b722007-05-11 16:50:42 +0000348- PEP 3132 was accepted. That means that you can do ``a, *b = range(5)``
349 to assign 0 to a and [1, 2, 3, 4] to b.
350
Guido van Rossum805365e2007-05-07 22:24:25 +0000351- range() now returns an iterator rather than a list. Floats are not allowed.
352 xrange() is no longer defined.
353
Nick Coghlan650f0d02007-04-15 12:05:43 +0000354- Patch #1660500: hide iteration variable in list comps, add set comps
355 and use common code to handle compilation of iterative expressions
356
Guido van Rossume27dc722007-03-27 22:37:34 +0000357- By default, != returns the opposite of ==, unless the latter returns
358 NotImplemented.
359
Collin Winter670e6922007-03-21 02:57:17 +0000360- Patch #1680961: sys.exitfunc has been removed and replaced with a private
361 C-level API.
362
Georg Brandl801dd732007-03-18 20:18:31 +0000363- PEP 3115: new metaclasses: the metaclass is now specified as a
364 keyword arg in the class statement, which can now use the full syntax of
365 a parameter list. Also, the metaclass can implement a __prepare__ function
366 which will be called to create the dictionary for the new class namespace.
367
Georg Brandl428f0642007-03-18 18:35:15 +0000368- The long-deprecated argument "pend" of PyFloat_FromString() has been
369 removed.
370
Georg Brandle32b4222007-03-10 22:13:27 +0000371- The dir() function has been extended to call the __dir__() method on
372 its argument, if it exists. If not, it will work like before. This allows
373 customizing the output of dir() in the presence of a __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000374
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000375- Removed support for __members__ and __methods__.
376
Georg Brandle32b4222007-03-10 22:13:27 +0000377- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000378
Georg Brandle32b4222007-03-10 22:13:27 +0000379- input() became raw_input(): the name input() now implements the
Guido van Rossum0240b922007-02-26 21:23:50 +0000380 functionality formerly known as raw_input(); the name raw_input()
381 is no longer defined.
382
Brett Cannon39590462007-02-26 22:01:14 +0000383- Classes listed in an 'except' clause must inherit from BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000384
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000385- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000386 and .keys(), .items(), .values() return dict views, which behave
387 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000388
Guido van Rossum8b545362007-02-09 23:52:14 +0000389- PEP 3105: print is now a function. Also (not in the PEP) the
390 'softspace' attribute of files is now gone (since print() doesn't use
391 it). A side effect of this change is that you can get incomplete
392 output lines in interactive sessions:
393
394 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000395 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000396
397 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000398
Brett Cannon398db8b2007-01-29 23:44:37 +0000399- PEP 3102: keyword-only arguments.
400
Guido van Rossumd4588c12007-02-13 19:55:23 +0000401- Int/Long unification is complete. The 'long' built-in type
Guido van Rossumec7027f2007-01-30 00:00:40 +0000402 and literals with trailing 'L' or 'l' have been removed.
403 Performance may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000404
405- 'except E, V' must now be spelled as 'except E as V' and deletes V
406 at the end of the except clause; V must be a simple name.
407
Neal Norwitzc1505362006-12-28 06:47:50 +0000408- Added function annotations per PEP 3107.
409
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000410- Added nonlocal declaration from PEP 3104
411
412 >>> def f(x):
413 ... def inc():
414 ... nonlocal x
415 ... x += 1
416 ... return x
417 ... return inc
418 ...
419 >>> inc = f(0)
420 >>> inc()
421 1
422 >>> inc()
423 2
424
Georg Brandl66a796e2006-12-19 20:50:34 +0000425- Moved intern() to sys.intern().
426
427- exec is now a function.
428
429- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000430
Neal Norwitz4886cc32006-08-21 17:06:07 +0000431- Classic classes are a thing of the past. All classes are new style.
432
433- Exceptions *must* derive from BaseException.
434
435- Integer division always returns a float. The -Q option is no more.
436 All the following are gone:
437 * PyNumber_Divide and PyNumber_InPlaceDivide
438 * __div__, __rdiv__, and __idiv__
439 * nb_divide, nb_inplace_divide
440 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
441 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
442 if we want to re-use __div__ and friends. If we do, it will make
443 it harder to write code for both 2.x and 3.x.)
444
445- 'as' and 'with' are keywords.
446
447- Absolute import is the default behavior for 'import foo' etc.
448
Neal Norwitz378b2c92006-08-29 07:57:22 +0000449- Removed support for syntax:
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000450 backticks (ie, `x`), <>
Neal Norwitz378b2c92006-08-29 07:57:22 +0000451
Neal Norwitz4886cc32006-08-21 17:06:07 +0000452- Removed these Python builtins:
Neal Norwitz01688022007-08-12 00:43:29 +0000453 apply(), callable(), coerce(), execfile(), file(), reduce(), reload()
Neal Norwitz4886cc32006-08-21 17:06:07 +0000454
Neal Norwitz378b2c92006-08-29 07:57:22 +0000455- Removed these Python methods:
456 {}.has_key
457
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000458- Removed these opcodes:
459 BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT
460
461- Remove C API support for restricted execution.
462
Guido van Rossumcf1be882007-08-30 22:07:17 +0000463- zip(), map() and filter() now return iterators, behaving like their
464 itertools counterparts. This also affect map()'s behavior on
465 sequences of unequal length -- it now stops after the shortest one
466 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000467
468- Additions:
Guido van Rossumcf1be882007-08-30 22:07:17 +0000469 set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000470
471- Added class decorators per PEP 3129.
472
473
474Extension Modules
475-----------------
476
477- Remove the imageop module. Obsolete long with its unit tests becoming
478 useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000479
480- Removed these attributes from Python modules:
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000481 * operator module: div, idiv, __div__, __idiv__, isCallable, sequenceIncludes
Guido van Rossume7ba4952007-06-06 23:52:48 +0000482 * sys module: exc_clear(), exc_type, exc_value, exc_traceback
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000483
484
485Library
486-------
487
488- Remove the compiler package. Use of the _ast module and (an eventual)
489 AST -> bytecode mechanism.
490
491- Removed these modules:
Guido van Rossum33d26892007-08-05 15:29:28 +0000492 * audiodev, Bastion, bsddb185, exceptions, linuxaudiodev,
493 md5, MimeWriter, mimify, popen2,
494 rexec, sets, sha, stringold, strop, sunaudiodev, timing, xmllib.
495
496- Moved these modules to Tools/Demos:
497 * toaiff
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000498
499- Remove obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL, DEVICE,
500 ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile, IOCTL, jpeg,
501 panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
502
503- Remove obsolete functions:
504 * commands.getstatus(), os.popen*,
505
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000506- Remove functions in the string module that are also string methods;
507 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000508
509- Remove support for long obsolete platforms: plat-aix3, plat-irix5.
510
511- Remove xmlrpclib.SlowParser. It was based on xmllib.
512
513- Patch #1680961: atexit has been reimplemented in C.
514
Walter Dörwald41980ca2007-08-16 21:55:45 +0000515- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
516
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000517
518Build
519-----
520
521C API
522-----
523
524- Removed these Python slots:
525 __coerce__, __div__, __idiv__, __rdiv__
Neal Norwitz4886cc32006-08-21 17:06:07 +0000526
Neal Norwitz4886cc32006-08-21 17:06:07 +0000527- Removed these C APIs:
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000528 PyNumber_Coerce(), PyNumber_CoerceEx(), PyMember_Get, PyMember_Set
Neal Norwitz4886cc32006-08-21 17:06:07 +0000529
530- Removed these C slots/fields:
531 nb_divide, nb_inplace_divide
532
533- Removed these macros:
Neal Norwitz30d1c512007-08-19 22:48:23 +0000534 staticforward, statichere, PyArg_GetInt, PyArg_NoArgs, _PyObject_Del
Neal Norwitz4886cc32006-08-21 17:06:07 +0000535
536- Removed these typedefs:
537 intargfunc, intintargfunc, intobjargproc, intintobjargproc,
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000538 getreadbufferproc, getwritebufferproc, getsegcountproc, getcharbufferproc,
539 memberlist
Neal Norwitz4886cc32006-08-21 17:06:07 +0000540
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000541
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000542Tests
543-----
544
Brett Cannone7a30f72008-03-03 03:36:27 +0000545- Removed test.testall as test.regrtest replaces it.
546
547
Brett Cannonced04e02005-02-13 22:53:22 +0000548Documentation
549-------------
550
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000551Mac
552---
553
Guido van Rossume7ba4952007-06-06 23:52:48 +0000554- The cfmfile was removed.
555
556
Guido van Rossum845702c2007-08-30 18:44:53 +0000557Platforms
558---------
559
560- Support for BeOS and AtheOS was removed (according to PEP 11).
561
562- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
563
Hye-Shik Chang4e422812005-07-17 02:36:59 +0000564
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000565Tools/Demos
566-----------
567
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000568**(For information about older versions, consult the HISTORY file.)**