blob: 31b2678a9e8bb1b7e274cf85406c19bfe3f004ad [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
Alexandre Vassalotti6461e102008-05-15 22:09:29 +000033- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
34 large to fit in a C long. ldexp(x, n) now returns a zero (with
35 suitable sign) if n is large and negative; previously, it raised
36 OverflowError.
37
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +000038- Issue 2865: webbrowser.open() works again in a KDE environment.
39
Brett Cannond3343cb2008-05-12 03:18:21 +000040- The multifile module has been removed.
41
Alexandre Vassalottice261952008-05-12 02:31:37 +000042- The SocketServer module has been renamed to socketserver.
43
Brett Cannon23a4a7b2008-05-12 00:56:28 +000044- Fix the __all__ setting on 'collections' to include UserList and UserString.
45
Brett Cannoncf3520c2008-05-11 22:47:58 +000046- The sre module has been removed.
47
Alexandre Vassalottif260e442008-05-11 19:59:59 +000048- The Queue module has been renamed to queue.
49
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +000050- The copy_reg module has been renamed to copyreg.
51
Brett Cannond8b61ee2008-05-11 03:00:26 +000052- The mhlib module has been removed.
53
Brett Cannonbd474422008-05-10 22:42:14 +000054- The ihooks module has been removed.
55
Brett Cannonb59a2bd2008-05-10 22:03:16 +000056- The fpformat module has been removed.
57
Brett Cannonf4fd9932008-05-10 21:11:46 +000058- The dircache module has been removed.
59
Brett Cannond175b4c2008-05-10 03:19:54 +000060- The Canvas module has been removed.
61
Mark Dickinsonb27406c2008-05-09 13:42:33 +000062- The Decimal module gained the magic methods __round__, __ceil__,
63 __floor__ and __trunc__, to give support for round, math.ceil,
64 math.floor and math.trunc.
65
Brett Cannon900ee3a2008-05-08 20:31:11 +000066- The user module has been removed.
67
Brett Cannon34afe872008-05-08 20:31:44 +000068- The mutex module has been removed.
69
Brett Cannon0d71ee72008-05-08 18:13:40 +000070- The imputil module has been removed.
71
Benjamin Petersond71ca412008-05-08 23:44:58 +000072- os.path.walk has been removed in favor of os.walk
73
Brett Cannon0d71ee72008-05-08 18:13:40 +000074Build
75-----
76
77
Barry Warsaw66079cd2008-04-04 01:36:36 +000078What's New in Python 3.0a5?
79===========================
80
Barry Warsaw9eab8b02008-05-08 13:05:38 +000081*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +000082
83Core and Builtins
84-----------------
85
Mark Dickinson7ab6be22008-04-15 21:42:42 +000086- Fix misbehaviour of PyLong_FromSsize_t on systems where sizeof(size_t) >
87 sizeof(long).
88
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +000089- Issue #2221: Corrected a SystemError "error return without exception set",
90 when the code executed by exec() raises an exception, and sys.stdout.flush()
91 also raises an error.
92
Martin v. Löwis250ad612008-04-07 05:43:42 +000093- Bug #2565: The repr() of type objects now calls them 'class',
94 not 'type' - whether they are builtin types or not.
95
Martin v. Löwis790465f2008-04-05 20:41:37 +000096- The command line processing was converted to pass Unicode strings
97 through as unmodified as possible; as a consequence, the C API
98 related to command line arguments was changed to use wchar_t.
99
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000100- All backslashes in raw strings are interpreted literally. This means that
101 '\u' and '\U' escapes are not treated specially.
102
Barry Warsaw66079cd2008-04-04 01:36:36 +0000103Extension Modules
104-----------------
105
106Library
107-------
108
Thomas Hellerb041fda2008-04-30 17:11:46 +0000109- ctypes objects now support the PEP3118 buffer interface
110
Thomas Hellere106dc32008-04-24 18:39:36 +0000111- Issue #2682: ctypes callback functions now longer contain a cyclic
112 reference to themselves.
113
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000114- Issue #2058: Remove the buf attribute and add __slots__ to the TarInfo
115 class in order to reduce tarfile's memory usage.
116
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000117- Bug #2606: Avoid calling .sort() on a dict_keys object.
118
Thomas Hellerbff533b2008-04-04 19:53:14 +0000119- The bundled libffi copy is now in sync with the recently released
120 libffi3.0.5 version, apart from some small changes to
121 Modules/_ctypes/libffi/configure.ac.
122
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000123Build
124-----
125
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000126- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
127
Guido van Rossumdc21db32008-04-07 18:37:41 +0000128- "make install" is now an alias for "make altinstall", to prevent
129 accidentally overwriting a Python 2.x installation.
130 Use "make fullinstall" to force Python 3.0 to be installed as
131 "python".
132
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000133- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
134 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000135
Barry Warsawa9d499d2008-03-01 18:38:07 +0000136What's New in Python 3.0a4?
137===========================
138
Barry Warsawbb5cd082008-04-02 23:33:27 +0000139*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000140
Martin v. Löwis25931462008-03-17 20:43:42 +0000141Core and Builtins
142-----------------
143
144- Bug #2301: Don't try decoding the source code into the original
145 encoding for syntax errors.
146
Martin v. Löwis92fab752008-03-08 10:40:41 +0000147Extension Modules
148-----------------
149
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000150- The dl module was removed, use the ctypes module instead.
151
Martin v. Löwis92fab752008-03-08 10:40:41 +0000152- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000153
Martin v. Löwis071ef772008-03-08 11:24:24 +0000154Library
155-------
156
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000157- The class distutils.commands.build_py.build_py_2to3 can be used
158 as a build_py replacement to automatically run 2to3 on modules
159 that are going to be installed.
160
Guido van Rossumf4169812008-03-17 22:56:06 +0000161- A new pickle protocol (protocol 3) is added with explicit support
162 for bytes. This is the default protocol. It intentionally cannot
163 be unpickled by Python 2.x.
164
165- When a pickle written by Python 2.x contains an (8-bit) str
166 instance, this is now decoded to a (Unicode) str instance. The
167 encoding used to do this defaults to ASCII, but can be overridden
168 via two new keyword arguments to the Unpickler class. Previously
169 this would create bytes instances, which is usually wrong: str
170 instances are often used to pickle attribute names etc., and text is
171 more common than binary data anyway.
172
Martin v. Löwis071ef772008-03-08 11:24:24 +0000173- Default to ASCII as the locale.getpreferredencoding, if the POSIX
174 system doesn't support CODESET and LANG isn't set or doesn't
175 allow deduction of an encoding.
176
Gregory P. Smith425136b2008-03-17 20:45:21 +0000177- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned value.
178
Trent Nelson428de652008-03-18 22:41:35 +0000179- Issue #719888: Updated tokenize to use a bytes API. generate_tokens has been
180 renamed tokenize and now works with bytes rather than strings. A new
181 detect_encoding function has been added for determining source file encoding
182 according to PEP-0263. Token sequences returned by tokenize always start
183 with an ENCODING token which specifies the encoding used to decode the file.
184 This token is used to encode the output of untokenize back to bytes.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000185
Christian Heimesbc873412007-12-08 22:11:32 +0000186What's New in Python 3.0a3?
187===========================
188
Barry Warsaw659fc422008-03-01 17:45:23 +0000189*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000190
191Core and Builtins
192-----------------
193
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000194- Issue #2282: io.TextIOWrapper was not overriding seekable() from io.IOBase.
195
Benjamin Petersonec79aad2008-04-02 22:44:10 +0000196- Issue #2115: Important speedup in setting __slot__ attributes. Also
197 prevent a possible crash: an Abstract Base Class would try to access a slot
Christian Heimesa156e092008-02-16 07:38:31 +0000198 on a registered virtual subclass.
199
200- Fixed repr() and str() of complex numbers with infinity or nan as real or
201 imaginary part.
202
203- Clear all free list during a gc.collect() of the highest generation in order
204 to allow pymalloc to free more arenas. Python may give back memory to the
205 OS earlier.
206
207- Issue #2045: Fix an infinite recursion triggered when printing a subclass of
208 collections.defaultdict, if its default_factory is set to a bound method.
209
210- Fixed a minor memory leak in dictobject.c. The content of the free
211 list was not freed on interpreter shutdown.
212
213- Limit free list of method and builtin function objects to 256 entries
214 each.
215
216- Patch #1953: Added ``sys._compact_freelists()`` and the C API functions
217 ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
218 to compact the internal free lists of pre-allocted ints and floats.
219
220- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
221 Python expected the return type int but the fork familie returns pi_t.
222
223- Issue #1678380: Fix a bug that identifies 0j and -0j when they appear
224 in the same code unit.
225
Raymond Hettinger65baa342008-02-07 00:41:02 +0000226- Issue #2025 : Add tuple.count() and tuple.index() methods to comply with
227 the collections.Sequence API.
228
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000229- Fixed multiple reinitialization of the Python interpreter. The small int
230 list in longobject.c has caused a seg fault during the third finalization.
231
Christian Heimesc04dac02008-01-30 11:27:57 +0000232- Issue #1973: bytes.fromhex('') raises SystemError
233
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000234- Issue #1771: remove cmp parameter from sorted() and list.sort()
235
Christian Heimes7b876152008-01-30 09:51:48 +0000236- Issue #1969: split and rsplit in bytearray are inconsistent
237
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000238- map() and no longer accepts None for the first argument.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000239 Use zip() instead.
240
Facundo Batista2336bdd2008-01-19 19:12:01 +0000241- Issue #1769: Now int("- 1") is not allowed any more.
242
Christian Heimes386cd1e2008-01-15 02:01:20 +0000243- Object/longobject.c: long(float('nan')) raises an OverflowError instead
244 of returning 0.
245
Christian Heimes3b06e532008-01-07 20:12:44 +0000246- Issue #1762972: __file__ points to the source file instead of the pyc/pyo
247 file if the py file exists.
248
Guido van Rossumab078dd2008-01-06 00:09:11 +0000249- Issue #1393: object_richcompare() returns NotImplemented instead of
250 False if the objects aren't equal, to give the other side a chance.
251
Guido van Rossume239b002008-01-06 00:44:20 +0000252- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000253
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000254- Improve some exception messages when Windows fails to load an extension
255 module. Now we get for example '%1 is not a valid Win32 application' instead
256 of 'error code 193'. Also use Unicode strings to deal with non-English
257 locales.
258
Christian Heimesa3534a62007-12-11 19:56:40 +0000259- Issue #1587: Added instancemethod wrapper for PyCFunctions. The Python C API
260 has gained a new type *PyInstanceMethod_Type* and the functions
261 *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)* and
262 *PyInstanceMethod_Function(im)*.
263
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000264- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed from the
265 gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE are now enough to
266 print the corresponding list of objects considered by the garbage collector.
267
Guido van Rossume239b002008-01-06 00:44:20 +0000268- Issue #1573: Improper use of the keyword-only syntax makes the parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000269
Christian Heimes0ded5b52007-12-10 15:50:56 +0000270- Issue #1564: The set implementation should special-case PyUnicode instead
Guido van Rossume239b002008-01-06 00:44:20 +0000271 of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000272
Guido van Rossumea6775b2008-02-21 20:16:31 +0000273- Patch #1031213: Decode source line in SyntaxErrors back to its
274 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000275
Christian Heimes09aaa882008-02-23 15:01:06 +0000276- inspect.getsource() includes the decorators again.
277
Guido van Rossumea6775b2008-02-21 20:16:31 +0000278- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
279 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000280
Christian Heimes7131fd92008-02-19 14:21:46 +0000281- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when the
Guido van Rossumea6775b2008-02-21 20:16:31 +0000282 first chunk fed to the decoder started with a BOM, but was longer than 3
283 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000284
Christian Heimes7131fd92008-02-19 14:21:46 +0000285
Christian Heimesbc873412007-12-08 22:11:32 +0000286Extension Modules
287-----------------
288
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000289- Code for itertools ifilter(), imap(), and izip() moved to bultins and
290 renamed to filter(), map(), and zip(). Also, renamed izip_longest()
291 to zip_longest() and ifilterfalse() to filterfalse().
292
Christian Heimes043d6f62008-01-07 17:19:16 +0000293- Issue #1762972: Readded the reload() function as imp.reload()
Guido van Rossumea6775b2008-02-21 20:16:31 +0000294
Christian Heimesa156e092008-02-16 07:38:31 +0000295- Bug #2111: mmap segfaults when trying to write a block opened with PROT_READ
296
297- #2063: correct order of utime and stime in os.times() result on Windows.
Christian Heimesbc873412007-12-08 22:11:32 +0000298
Christian Heimes7131fd92008-02-19 14:21:46 +0000299
Christian Heimesbc873412007-12-08 22:11:32 +0000300Library
301-------
302
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000303- Weakref dictionaries now inherit from MutableMapping.
304 XXX their API still needs to be modernized (i.e. eliminate the iter methods).
305
306- Created new UserDict class in collections module. This one inherits from and
Raymond Hettingerb3a65f82008-02-21 22:11:37 +0000307 complies with the MutableMapping ABC. Also, moved UserString and UserList
308 to the collections module. The MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000309
Guido van Rossumea6775b2008-02-21 20:16:31 +0000310- Removed UserDict.DictMixin. Replaced all its uses with
311 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000312
Guido van Rossume239b002008-01-06 00:44:20 +0000313- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000314
Guido van Rossume239b002008-01-06 00:44:20 +0000315- Issue #1585: IDLE uses non-existent xrange() function.
316
317- Issue #1578: Problems in win_getpass.
318
Georg Brandl52d168a2008-01-07 18:10:24 +0000319Build
320-----
321
322- Renamed --enable-unicode configure flag to --with-wide-unicode, since
323 Unicode strings can't be disabled anymore.
324
325
Guido van Rossume239b002008-01-06 00:44:20 +0000326C API
327-----
328
329- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
330 Py_TYPE and Py_REFCNT.
331
332- New API PyImport_ImportModuleNoBlock(), works like PyImport_ImportModule()
333 but won't block on the import lock (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000334
Christian Heimesbc873412007-12-08 22:11:32 +0000335
Fred Drake0e474a82007-10-11 18:01:43 +0000336What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000337===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000338
Guido van Rossum99533a92007-12-06 05:07:41 +0000339*Release date: 07-Dec-2007*
340
341(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000342
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000343Core and Builtins
344-----------------
345
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000346- str8 now has the same construction signature as bytes.
347
Brett Cannon40430012007-10-22 20:24:51 +0000348- Comparisons between str and str8 now return False/True for ==/!=. sqlite3
349 returns str8 when recreating on object from it's __conform__ value. The
350 struct module returns str8 for all string-related formats. This was true
351 before this change, but becomes more apparent thanks to string comparisons
352 always being False.
353
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000354- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode, buffer,
355 encoding, newline)`
356
357- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
358
359- Changed `__file__` and `co_filename` to unicode. The path names are decoded
360 with `Py_FileSystemDefaultEncoding` and a new API method
361 `PyUnicode_DecodeFSDefault(char*)` was added.
362
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000363- io.open() and _fileio.FileIO have grown a new argument closefd. A false
364 value disables the closing of the file descriptor.
365
Guido van Rossum98297ee2007-11-06 21:34:58 +0000366- Added a new option -b to issues warnings (-bb for errors) about certain
367 operations between bytes/buffer and str like str(b'') and comparsion.
368
Christian Heimes58cb1b82007-11-13 02:19:40 +0000369- The standards streams sys.stdin, stdout and stderr may be None when the
370 when the C runtime library returns an invalid file descriptor for the
371 streams (fileno(stdin) < 0). For now this happens only for Windows GUI
372 apps and scripts started with `pythonw.exe`.
373
Christian Heimesbce52be2007-11-17 19:08:41 +0000374- Added PCbuild9 directory for VS 2008.
375
376- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to work
377 around a name clash with VS 2008 on Windows.
378
Christian Heimesff737952007-11-27 10:40:20 +0000379- Unbound methods are gone for good. ClassObject.method returns an ordinary
380 function object, instance.method still returns a bound method object.
381 The API of bound methods is cleaned up, too. The im_class attribute is
382 removed and im_func + im_self are renamed to __func__ and __self__. The
383 factory PyMethod_New takes only func and instance as argument.
384
Christian Heimesf78b1c62007-12-02 16:52:32 +0000385- intobject.h is no longer included by Python.h. The remains were moved
386 to longobject.h. It still exists to define several aliases from PyInt_
387 to PyLong_ functions.
388
Christian Heimesa37d4c62007-12-04 23:02:19 +0000389- Removed sys.maxint, use sys.maxsize instead.
390
Christian Heimesbce52be2007-11-17 19:08:41 +0000391
Fred Drake0e474a82007-10-11 18:01:43 +0000392Extension Modules
393-----------------
394
395- The `hotshot` profiler has been removed; use `cProfile` instead.
396
397
Brett Cannone9fd2312007-10-12 19:18:19 +0000398Library
399-------
400
401- When loading an external file using testfile(), the passed-in encoding
402 argument was being ignored if __loader__ is defined and forcing the source to
403 be UTF-8.
404
Guido van Rossum687b9c02007-10-25 23:18:51 +0000405- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have been
406 removed in favor of the tempfile module.
407
Christian Heimesc9543e42007-11-28 08:28:28 +0000408- Removed the 'new' module.
409
410- Removed all types from the 'types' module that are easily accessable through
411 builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000412
Georg Brandl52d168a2008-01-07 18:10:24 +0000413
Guido van Rossum4405cf32007-08-30 17:16:55 +0000414What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000415==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000416
Guido van Rossum4405cf32007-08-30 17:16:55 +0000417*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000418
419Core and Builtins
420-----------------
421
Martin v. Löwis47383402007-08-15 07:32:56 +0000422- PEP 3131: Support non-ASCII identifiers.
423
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000424- PEP 3120: Change default encoding to UTF-8.
425
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000426- PEP 3123: Use proper C inheritance for PyObject.
427
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000428- Removed the __oct__ and __hex__ special methods and added a bin()
429 builtin function.
430
431- PEP 3127: octal literals now start with "0o". Old-style octal literals
432 are invalid. There are binary literals with a prefix of "0b".
433 This also affects int(x, 0).
434
Guido van Rossume7ba4952007-06-06 23:52:48 +0000435- None, True, False are now keywords.
436
Guido van Rossum29478ef2007-05-29 00:39:44 +0000437- PEP 3119: isinstance() and issubclass() can be overridden.
438
Guido van Rossumebe3e162007-05-17 18:20:34 +0000439- Remove BaseException.message.
440
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000441- Remove tuple parameter unpacking (PEP 3113).
442
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000443- Remove the f_restricted attribute from frames. This naturally leads to the
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000444 removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
445
Guido van Rossum0368b722007-05-11 16:50:42 +0000446- PEP 3132 was accepted. That means that you can do ``a, *b = range(5)``
447 to assign 0 to a and [1, 2, 3, 4] to b.
448
Guido van Rossum805365e2007-05-07 22:24:25 +0000449- range() now returns an iterator rather than a list. Floats are not allowed.
450 xrange() is no longer defined.
451
Nick Coghlan650f0d02007-04-15 12:05:43 +0000452- Patch #1660500: hide iteration variable in list comps, add set comps
453 and use common code to handle compilation of iterative expressions
454
Guido van Rossume27dc722007-03-27 22:37:34 +0000455- By default, != returns the opposite of ==, unless the latter returns
456 NotImplemented.
457
Collin Winter670e6922007-03-21 02:57:17 +0000458- Patch #1680961: sys.exitfunc has been removed and replaced with a private
459 C-level API.
460
Georg Brandl801dd732007-03-18 20:18:31 +0000461- PEP 3115: new metaclasses: the metaclass is now specified as a
462 keyword arg in the class statement, which can now use the full syntax of
463 a parameter list. Also, the metaclass can implement a __prepare__ function
464 which will be called to create the dictionary for the new class namespace.
465
Georg Brandl428f0642007-03-18 18:35:15 +0000466- The long-deprecated argument "pend" of PyFloat_FromString() has been
467 removed.
468
Georg Brandle32b4222007-03-10 22:13:27 +0000469- The dir() function has been extended to call the __dir__() method on
470 its argument, if it exists. If not, it will work like before. This allows
471 customizing the output of dir() in the presence of a __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000472
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000473- Removed support for __members__ and __methods__.
474
Georg Brandle32b4222007-03-10 22:13:27 +0000475- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000476
Georg Brandle32b4222007-03-10 22:13:27 +0000477- input() became raw_input(): the name input() now implements the
Guido van Rossum0240b922007-02-26 21:23:50 +0000478 functionality formerly known as raw_input(); the name raw_input()
479 is no longer defined.
480
Brett Cannon39590462007-02-26 22:01:14 +0000481- Classes listed in an 'except' clause must inherit from BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000482
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000483- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000484 and .keys(), .items(), .values() return dict views, which behave
485 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000486
Guido van Rossum8b545362007-02-09 23:52:14 +0000487- PEP 3105: print is now a function. Also (not in the PEP) the
488 'softspace' attribute of files is now gone (since print() doesn't use
489 it). A side effect of this change is that you can get incomplete
490 output lines in interactive sessions:
491
492 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000493 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000494
495 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000496
Brett Cannon398db8b2007-01-29 23:44:37 +0000497- PEP 3102: keyword-only arguments.
498
Guido van Rossumd4588c12007-02-13 19:55:23 +0000499- Int/Long unification is complete. The 'long' built-in type
Guido van Rossumec7027f2007-01-30 00:00:40 +0000500 and literals with trailing 'L' or 'l' have been removed.
501 Performance may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000502
503- 'except E, V' must now be spelled as 'except E as V' and deletes V
504 at the end of the except clause; V must be a simple name.
505
Neal Norwitzc1505362006-12-28 06:47:50 +0000506- Added function annotations per PEP 3107.
507
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000508- Added nonlocal declaration from PEP 3104
509
510 >>> def f(x):
511 ... def inc():
512 ... nonlocal x
513 ... x += 1
514 ... return x
515 ... return inc
516 ...
517 >>> inc = f(0)
518 >>> inc()
519 1
520 >>> inc()
521 2
522
Georg Brandl66a796e2006-12-19 20:50:34 +0000523- Moved intern() to sys.intern().
524
525- exec is now a function.
526
527- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000528
Neal Norwitz4886cc32006-08-21 17:06:07 +0000529- Classic classes are a thing of the past. All classes are new style.
530
531- Exceptions *must* derive from BaseException.
532
533- Integer division always returns a float. The -Q option is no more.
534 All the following are gone:
535 * PyNumber_Divide and PyNumber_InPlaceDivide
536 * __div__, __rdiv__, and __idiv__
537 * nb_divide, nb_inplace_divide
538 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
539 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
540 if we want to re-use __div__ and friends. If we do, it will make
541 it harder to write code for both 2.x and 3.x.)
542
543- 'as' and 'with' are keywords.
544
545- Absolute import is the default behavior for 'import foo' etc.
546
Neal Norwitz378b2c92006-08-29 07:57:22 +0000547- Removed support for syntax:
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000548 backticks (ie, `x`), <>
Neal Norwitz378b2c92006-08-29 07:57:22 +0000549
Neal Norwitz4886cc32006-08-21 17:06:07 +0000550- Removed these Python builtins:
Neal Norwitz01688022007-08-12 00:43:29 +0000551 apply(), callable(), coerce(), execfile(), file(), reduce(), reload()
Neal Norwitz4886cc32006-08-21 17:06:07 +0000552
Neal Norwitz378b2c92006-08-29 07:57:22 +0000553- Removed these Python methods:
554 {}.has_key
555
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000556- Removed these opcodes:
557 BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT
558
559- Remove C API support for restricted execution.
560
Guido van Rossumcf1be882007-08-30 22:07:17 +0000561- zip(), map() and filter() now return iterators, behaving like their
562 itertools counterparts. This also affect map()'s behavior on
563 sequences of unequal length -- it now stops after the shortest one
564 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000565
566- Additions:
Guido van Rossumcf1be882007-08-30 22:07:17 +0000567 set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000568
569- Added class decorators per PEP 3129.
570
571
572Extension Modules
573-----------------
574
575- Remove the imageop module. Obsolete long with its unit tests becoming
576 useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000577
578- Removed these attributes from Python modules:
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000579 * operator module: div, idiv, __div__, __idiv__, isCallable, sequenceIncludes
Guido van Rossume7ba4952007-06-06 23:52:48 +0000580 * sys module: exc_clear(), exc_type, exc_value, exc_traceback
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000581
582
583Library
584-------
585
586- Remove the compiler package. Use of the _ast module and (an eventual)
587 AST -> bytecode mechanism.
588
589- Removed these modules:
Guido van Rossum33d26892007-08-05 15:29:28 +0000590 * audiodev, Bastion, bsddb185, exceptions, linuxaudiodev,
591 md5, MimeWriter, mimify, popen2,
592 rexec, sets, sha, stringold, strop, sunaudiodev, timing, xmllib.
593
594- Moved these modules to Tools/Demos:
595 * toaiff
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000596
597- Remove obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL, DEVICE,
598 ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile, IOCTL, jpeg,
599 panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
600
601- Remove obsolete functions:
602 * commands.getstatus(), os.popen*,
603
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000604- Remove functions in the string module that are also string methods;
605 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000606
607- Remove support for long obsolete platforms: plat-aix3, plat-irix5.
608
609- Remove xmlrpclib.SlowParser. It was based on xmllib.
610
611- Patch #1680961: atexit has been reimplemented in C.
612
Walter Dörwald41980ca2007-08-16 21:55:45 +0000613- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
614
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000615
616Build
617-----
618
619C API
620-----
621
622- Removed these Python slots:
623 __coerce__, __div__, __idiv__, __rdiv__
Neal Norwitz4886cc32006-08-21 17:06:07 +0000624
Neal Norwitz4886cc32006-08-21 17:06:07 +0000625- Removed these C APIs:
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000626 PyNumber_Coerce(), PyNumber_CoerceEx(), PyMember_Get, PyMember_Set
Neal Norwitz4886cc32006-08-21 17:06:07 +0000627
628- Removed these C slots/fields:
629 nb_divide, nb_inplace_divide
630
631- Removed these macros:
Neal Norwitz30d1c512007-08-19 22:48:23 +0000632 staticforward, statichere, PyArg_GetInt, PyArg_NoArgs, _PyObject_Del
Neal Norwitz4886cc32006-08-21 17:06:07 +0000633
634- Removed these typedefs:
635 intargfunc, intintargfunc, intobjargproc, intintobjargproc,
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000636 getreadbufferproc, getwritebufferproc, getsegcountproc, getcharbufferproc,
637 memberlist
Neal Norwitz4886cc32006-08-21 17:06:07 +0000638
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000639
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000640Tests
641-----
642
Brett Cannone7a30f72008-03-03 03:36:27 +0000643- Removed test.testall as test.regrtest replaces it.
644
645
Brett Cannonced04e02005-02-13 22:53:22 +0000646Documentation
647-------------
648
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000649Mac
650---
651
Guido van Rossume7ba4952007-06-06 23:52:48 +0000652- The cfmfile was removed.
653
654
Guido van Rossum845702c2007-08-30 18:44:53 +0000655Platforms
656---------
657
658- Support for BeOS and AtheOS was removed (according to PEP 11).
659
660- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
661
Hye-Shik Chang4e422812005-07-17 02:36:59 +0000662
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000663Tools/Demos
664-----------
665
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000666**(For information about older versions, consult the HISTORY file.)**