blob: 8d163c214ab09c28fb191703408ceee620a257f1 [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
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +00007What's new in Python 3.0b3?
8===========================
9
10*Release date: XX-XXX-2008*
11
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000012Core and Builtins
13-----------------
14
Antoine Pitrouee58fa42008-08-19 18:22:14 +000015- Issue #3560: clean up the new C PyMemoryView API so that naming is
16 internally consistent; add macros PyMemoryView_GET_BASE() and
17 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
18 without relying on a particular implementation; remove the ill-named
19 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
20
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000021- Issue #1819: function calls with several named parameters are now on
22 average 35% faster (as measured by pybench).
23
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +000024- The undocumented C APIs PyUnicode_AsString() and
25 PyUnicode_AsStringAndSize() were made private to the interpreter, in
26 order to be able to refine their interfaces for Python 3.1.
27
28 If you need to access the UTF-8 representation of a Unicode object
29 as bytes string, please use PyUnicode_AsUTF8String() instead.
30
Antoine Pitrouaf14b792008-08-07 21:50:41 +000031- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
32 to Python 3.0's stricter semantics which allow to avoid successive
33 reallocations of the result string (this also affects str.join()).
34
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +000035
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000036Library
37-------
38
Antoine Pitroufd036452008-08-19 17:56:33 +000039- Issue #2834: update the regular expression library to match the unicode
40 standards of py3k. In other words, mixing bytes and unicode strings
41 (be it as pattern, search string or replacement string) raises a TypeError.
42 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
43 and can be disabled by specifying a new re.ASCII flag; as for bytes
44 patterns, ASCII matching is the only option and trying to specify re.UNICODE
45 for such patterns raises a ValueError.
46
Guido van Rossum52dbbb92008-08-18 21:44:30 +000047- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
48 Code contributed by Matt Giuca. quote() now encodes the input
49 before quoting, unquote() decodes after unquoting. There are
50 new arguments to change the encoding and errors settings.
51 There are also new APIs to skip the encode/decode steps.
52 [un]quote_plus() are also affected.
53
Nick Coghlan36f49522008-08-18 12:31:52 +000054- Issue #2235: numbers.Number now blocks inheritance of the default id()
55 based hash because that hash mechanism is not correct for numeric types.
56 All concrete numeric types that inherit from Number (rather than just
57 registering with it) must explicitly provide a hash implementation in
58 order for their instances to be hashable.
59
Benjamin Peterson4cd6a952008-08-17 20:23:46 +000060- Issue #2676: in the email package, content-type parsing was hanging on
61 pathological input because of quadratic or exponential behaviour of a
62 regular expression.
63
Antoine Pitrou87695762008-08-14 22:44:29 +000064- Issue #3476: binary buffered reading through the new "io" library is now
65 thread-safe.
66
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +000067- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
68 menu entries were not deleted.
69
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +000070- Remove the TarFileCompat class from tarfile.py.
71
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +000072- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
73 accepts the same parameters. It just checks that its first argument is an
74 integer.
75
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000076- Issue #3394: zipfile.writestr sets external attributes when passed a
77 file name rather than a ZipInfo instance, so files are extracted with
78 mode 0600 rather than 000 under Unix.
79
Antoine Pitrouc66f9092008-07-28 19:46:11 +000080- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
81 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000082
Martin v. Löwis371bb502008-08-16 13:02:57 +000083Extension Modules
84-----------------
85
86- Bug #3542: Support Unicode strings in _msi module.
87
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +000088What's new in Python 3.0b2?
89===========================
90
Barry Warsaw4bd1cef2008-07-18 02:28:44 +000091*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +000092
93Core and Builtins
94-----------------
95
Mark Dickinson65fe25e2008-07-16 11:30:51 +000096- Issue #3008: the float type has a new instance method 'float.hex'
97 and a new class method 'float.fromhex' to convert floating-point
98 numbers to and from hexadecimal strings, respectively.
99
Eric Smithd68af8f2008-07-16 00:15:35 +0000100- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
101 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
102
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000103- Issue #3280: like chr(), the "%c" format now accepts unicode code points
104 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
105 "narrow Unicode" builds, the result is a string of 2 code units, forming a
106 UTF-16 surrogate pair.
107
Georg Brandld52429f2008-07-04 15:55:02 +0000108- Issue #3282: str.isprintable() should return False for undefined
109 Unicode characters.
110
Martin v. Löwis029656f2008-06-30 04:06:08 +0000111- Issue #3236: Return small longs from PyLong_FromString.
112
Benjamin Petersone6528212008-07-15 15:32:09 +0000113- Exception tracebacks now support exception chaining.
114
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000115Library
116-------
117
Brett Cannonc2542e92008-07-25 18:19:20 +0000118- Removed the sunaudio module. Use sunau instead.
119
Thomas Heller47bc8092008-08-19 06:38:12 +0000120- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
121 api functions without holding the GIL, which could lead to a fatal
122 error when they failed.
123
124- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
125
Georg Brandl30704ea02008-07-23 15:07:12 +0000126- Removed "ast" function aliases from the parser module.
127
Thomas Heller15383a02008-07-15 19:46:52 +0000128- Issue #3313: Fixed a crash when a failed dlopen() call does not set
129 a valid dlerror() message.
130
Thomas Heller0261e1e2008-07-15 17:25:07 +0000131- Issue #3258: Fixed a crash when a ctypes POINTER type to an
132 incomplete structure was created.
133
Georg Brandl1abcbf82008-07-01 19:28:43 +0000134- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
135 argument now must be a bytes object in any case.
136
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000137- Issue #3145: help("modules whatever") failed when trying to load the source
138 code of every single module of the standard library, including invalid files
139 used in the test suite.
140
Georg Brandlbded4d32008-07-17 18:15:35 +0000141- The gettext library now consistently uses Unicode strings for message ids
142 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000143
Benjamin Petersone6528212008-07-15 15:32:09 +0000144- The traceback module has been expanded to handle chained exceptions.
145
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000146C API
147-----
148
149- Issue #3247: the function Py_FindMethod was removed. Modern types should
150 use the tp_methods slot instead.
151
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000152Tools/Demos
153-----------
154
Georg Brandl336341f2008-07-01 20:21:28 +0000155- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000156
Georg Brandl336341f2008-07-01 20:21:28 +0000157- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000158
159
Brett Cannon0d71ee72008-05-08 18:13:40 +0000160What's new in Python 3.0b1?
161===========================
162
Barry Warsawc1e689e2008-06-19 00:35:43 +0000163*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000164
165Core and Builtins
166-----------------
167
Brett Cannondb734912008-06-27 00:52:15 +0000168- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
169 argument being anything other than a dict or None. Also fixed a bug in error
170 handling when 'message' and 'category' were both set to None, triggering a
171 bus error.
172
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000173- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
174 holds the last (strong) reference to its referent.
175
Georg Brandl559e5d72008-06-11 18:37:52 +0000176- Issue #2630: implement PEP 3138. repr() now returns printable
177 Unicode characters unescaped, to get an ASCII-only representation
178 of an object use ascii().
179
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000180- Issue #1342: On windows, Python could not start when installed in a
181 directory with non-ascii characters.
182
Martin v. Löwis1a214512008-06-11 05:26:20 +0000183- Implement PEP 3121: new module initialization and finalization API.
184
Georg Brandle1b5ac62008-06-04 13:06:58 +0000185- Removed the already-defunct ``-t`` option.
186
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000187- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
188 unmarshalling many code objects, which happens when importing a
189 large .pyc file (~1000 functions).
190
Georg Brandl52b92cc2008-05-25 09:43:03 +0000191- Issue #2963: fix merging oversight that disabled method cache for
192 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000193
Georg Brandlc9b09532008-05-25 09:24:38 +0000194- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
195
Georg Brandl52b92cc2008-05-25 09:43:03 +0000196- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000197
Georg Brandl52b92cc2008-05-25 09:43:03 +0000198- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
199 code now allows any unicode string and returns a utf-8 encoded
200 buffer, just like the "s#" code already does. The "z" code was
201 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000202
Georg Brandl52b92cc2008-05-25 09:43:03 +0000203- Issue #2863: generators now have a ``gen.__name__`` attribute that
204 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
205 ``func.func_code.co_name``. The repr() of a generator now also
206 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000207
208- Issue #2831: enumerate() now has a ``start`` argument.
209
Georg Brandl52b92cc2008-05-25 09:43:03 +0000210- Issue #2801: fix bug in the float.is_integer method where a
211 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000212
Georg Brandl52b92cc2008-05-25 09:43:03 +0000213- The ``--with-toolbox-glue`` option (and the associated
214 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000215
Georg Brandl52b92cc2008-05-25 09:43:03 +0000216- Issue #2196: hasattr() now lets exceptions which do not inherit
217 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
218 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000219
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000220- #3021 Exception reraising sematics have been significantly improved. However,
221 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
222 code anymore.
223
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000224- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
225 removed.
226
Brett Cannon0d71ee72008-05-08 18:13:40 +0000227Extension Modules
228-----------------
229
Georg Brandl38feaf02008-05-25 07:45:51 +0000230- Renamed ``_winreg`` module to ``winreg``.
231
Georg Brandl52b92cc2008-05-25 09:43:03 +0000232- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
233 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000234
235- Support for Windows 9x has been removed from the winsound module.
236
Georg Brandl52b92cc2008-05-25 09:43:03 +0000237- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000238
Brett Cannon0d71ee72008-05-08 18:13:40 +0000239Library
240-------
241
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000242- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
243
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000244- a new ``urllib`` package was created. It consists of code from
245 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
246 modules have all been removed. The new package has five submodules:
247 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
248 ``urllib.error``, and ``urllib.robotparser``. The
249 ``urllib.request.urlopen()`` function uses the url opener from
250 ``urllib2``. (Note that the unittests have not been renamed for the
251 beta, but they will be renamed in the future.)
252
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000253- rfc822 has been removed in favor of the email package.
254
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000255- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000256
Barry Warsawf5019422008-06-12 02:42:00 +0000257- Patch #2849: Remove use of rfc822 module from standard library.
258
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000259- Added C optimized implementation of io.StringIO.
260
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000261- The ``pickle`` module is now automatically use an optimized C
262 implementation of Pickler and Unpickler when available. The
263 ``cPickle`` module is no longer needed.
264
Georg Brandl877b10a2008-06-01 21:25:55 +0000265- Removed the ``htmllib`` and ``sgmllib`` modules.
266
Georg Brandl61013952008-05-28 15:56:30 +0000267- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
268 been removed from ``http.cookies``.
269
Brett Cannona23810f2008-05-26 19:04:21 +0000270- The ``commands`` module has been removed. Its getoutput() and
271 getstatusoutput() functions have been moved to the ``subprocess`` module.
272
Georg Brandl3d5c4252008-05-26 18:03:26 +0000273- The ``http`` package was created; it contains the old ``httplib``
274 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
275 as ``http.cookiejar``, and the content of the three ``HTTPServer``
276 modules as ``http.server``.
277
Georg Brandl38eceaa2008-05-26 11:14:17 +0000278- The ``xmlrpc`` package was created; it contains the old
279 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
280 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000281 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000282
283- The ``dbm`` package was created, containing the old modules
284 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
285 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
286 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
287 as submodules.
288
Georg Brandl52b92cc2008-05-25 09:43:03 +0000289- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000290
Georg Brandl52b92cc2008-05-25 09:43:03 +0000291- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000292
Georg Brandl52b92cc2008-05-25 09:43:03 +0000293- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000294
Georg Brandl52b92cc2008-05-25 09:43:03 +0000295- Issue #2250: Exceptions raised during evaluation of names in
296 rlcompleter's ``Completer.complete()`` method are now caught and
297 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000298
Georg Brandl52b92cc2008-05-25 09:43:03 +0000299- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
300 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000301
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000302- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
303 large to fit in a C long. ldexp(x, n) now returns a zero (with
304 suitable sign) if n is large and negative; previously, it raised
305 OverflowError.
306
Georg Brandl52b92cc2008-05-25 09:43:03 +0000307- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000308
Georg Brandl52b92cc2008-05-25 09:43:03 +0000309- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000310
Georg Brandl52b92cc2008-05-25 09:43:03 +0000311- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000312
Georg Brandl52b92cc2008-05-25 09:43:03 +0000313- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000314
Georg Brandl52b92cc2008-05-25 09:43:03 +0000315- Fixed the ``__all__`` setting on ``collections`` to include
316 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000317
Brett Cannoncf3520c2008-05-11 22:47:58 +0000318- The sre module has been removed.
319
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000320- The Queue module has been renamed to queue.
321
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000322- The copy_reg module has been renamed to copyreg.
323
Brett Cannond8b61ee2008-05-11 03:00:26 +0000324- The mhlib module has been removed.
325
Brett Cannonbd474422008-05-10 22:42:14 +0000326- The ihooks module has been removed.
327
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000328- The fpformat module has been removed.
329
Brett Cannonf4fd9932008-05-10 21:11:46 +0000330- The dircache module has been removed.
331
Brett Cannond175b4c2008-05-10 03:19:54 +0000332- The Canvas module has been removed.
333
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000334- The Decimal module gained the magic methods __round__, __ceil__,
335 __floor__ and __trunc__, to give support for round, math.ceil,
336 math.floor and math.trunc.
337
Brett Cannon900ee3a2008-05-08 20:31:11 +0000338- The user module has been removed.
339
Brett Cannon34afe872008-05-08 20:31:44 +0000340- The mutex module has been removed.
341
Brett Cannon0d71ee72008-05-08 18:13:40 +0000342- The imputil module has been removed.
343
Georg Brandl52b92cc2008-05-25 09:43:03 +0000344- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000345
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000346- pdb gained the "until" command.
347
Georg Brandl52b92cc2008-05-25 09:43:03 +0000348- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000349
Georg Brandl32de7af2008-08-18 23:07:41 +0000350- The threading module API was renamed to be PEP 8 compliant. The
351 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000352
Georg Brandl294d5a92008-06-01 19:25:32 +0000353Tools/Demos
354-----------
355
356- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000357
Brett Cannon0d71ee72008-05-08 18:13:40 +0000358Build
359-----
360
361
Barry Warsaw66079cd2008-04-04 01:36:36 +0000362What's New in Python 3.0a5?
363===========================
364
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000365*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000366
367Core and Builtins
368-----------------
369
Georg Brandl52b92cc2008-05-25 09:43:03 +0000370- Fixed misbehaviour of PyLong_FromSsize_t on systems where
371 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000372
Georg Brandl52b92cc2008-05-25 09:43:03 +0000373- Issue #2221: Corrected a SystemError "error return without exception
374 set", when the code executed by exec() raises an exception, and
375 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000376
Georg Brandl52b92cc2008-05-25 09:43:03 +0000377- Bug #2565: The repr() of type objects now calls them 'class', not
378 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000379
Martin v. Löwis790465f2008-04-05 20:41:37 +0000380- The command line processing was converted to pass Unicode strings
381 through as unmodified as possible; as a consequence, the C API
382 related to command line arguments was changed to use wchar_t.
383
Georg Brandl52b92cc2008-05-25 09:43:03 +0000384- All backslashes in raw strings are interpreted literally. This
385 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000386
Barry Warsaw66079cd2008-04-04 01:36:36 +0000387Extension Modules
388-----------------
389
390Library
391-------
392
Georg Brandl52b92cc2008-05-25 09:43:03 +0000393- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000394
Thomas Hellere106dc32008-04-24 18:39:36 +0000395- Issue #2682: ctypes callback functions now longer contain a cyclic
396 reference to themselves.
397
Georg Brandl52b92cc2008-05-25 09:43:03 +0000398- Issue #2058: Remove the buf attribute and add __slots__ to the
399 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000400
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000401- Bug #2606: Avoid calling .sort() on a dict_keys object.
402
Thomas Hellerbff533b2008-04-04 19:53:14 +0000403- The bundled libffi copy is now in sync with the recently released
404 libffi3.0.5 version, apart from some small changes to
405 Modules/_ctypes/libffi/configure.ac.
406
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000407Build
408-----
409
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000410- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
411
Guido van Rossumdc21db32008-04-07 18:37:41 +0000412- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000413 accidentally overwriting a Python 2.x installation. Use "make
414 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000415
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000416- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
417 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000418
Georg Brandl52b92cc2008-05-25 09:43:03 +0000419
Barry Warsawa9d499d2008-03-01 18:38:07 +0000420What's New in Python 3.0a4?
421===========================
422
Barry Warsawbb5cd082008-04-02 23:33:27 +0000423*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000424
Martin v. Löwis25931462008-03-17 20:43:42 +0000425Core and Builtins
426-----------------
427
428- Bug #2301: Don't try decoding the source code into the original
429 encoding for syntax errors.
430
Martin v. Löwis92fab752008-03-08 10:40:41 +0000431Extension Modules
432-----------------
433
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000434- The dl module was removed, use the ctypes module instead.
435
Martin v. Löwis92fab752008-03-08 10:40:41 +0000436- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000437
Martin v. Löwis071ef772008-03-08 11:24:24 +0000438Library
439-------
440
Georg Brandl52b92cc2008-05-25 09:43:03 +0000441- The class distutils.commands.build_py.build_py_2to3 can be used as a
442 build_py replacement to automatically run 2to3 on modules that are
443 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000444
Guido van Rossumf4169812008-03-17 22:56:06 +0000445- A new pickle protocol (protocol 3) is added with explicit support
446 for bytes. This is the default protocol. It intentionally cannot
447 be unpickled by Python 2.x.
448
449- When a pickle written by Python 2.x contains an (8-bit) str
450 instance, this is now decoded to a (Unicode) str instance. The
451 encoding used to do this defaults to ASCII, but can be overridden
452 via two new keyword arguments to the Unpickler class. Previously
453 this would create bytes instances, which is usually wrong: str
454 instances are often used to pickle attribute names etc., and text is
455 more common than binary data anyway.
456
Martin v. Löwis071ef772008-03-08 11:24:24 +0000457- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000458 system doesn't support CODESET and LANG isn't set or doesn't allow
459 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000460
Georg Brandl52b92cc2008-05-25 09:43:03 +0000461- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
462 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000463
Georg Brandl52b92cc2008-05-25 09:43:03 +0000464- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
465 has been renamed tokenize and now works with bytes rather than
466 strings. A new detect_encoding function has been added for
467 determining source file encoding according to PEP-0263. Token
468 sequences returned by tokenize always start with an ENCODING token
469 which specifies the encoding used to decode the file. This token is
470 used to encode the output of untokenize back to bytes.
471
Barry Warsawa9d499d2008-03-01 18:38:07 +0000472
Christian Heimesbc873412007-12-08 22:11:32 +0000473What's New in Python 3.0a3?
474===========================
475
Barry Warsaw659fc422008-03-01 17:45:23 +0000476*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000477
478Core and Builtins
479-----------------
480
Georg Brandl52b92cc2008-05-25 09:43:03 +0000481- Issue #2282: io.TextIOWrapper was not overriding seekable() from
482 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000483
Georg Brandl52b92cc2008-05-25 09:43:03 +0000484- Issue #2115: Important speedup in setting __slot__ attributes. Also
485 prevent a possible crash: an Abstract Base Class would try to access
486 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000487
Georg Brandl52b92cc2008-05-25 09:43:03 +0000488- Fixed repr() and str() of complex numbers with infinity or nan as
489 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000490
Georg Brandl52b92cc2008-05-25 09:43:03 +0000491- Clear all free list during a gc.collect() of the highest generation
492 in order to allow pymalloc to free more arenas. Python may give back
493 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000494
Georg Brandl52b92cc2008-05-25 09:43:03 +0000495- Issue #2045: Fix an infinite recursion triggered when printing a
496 subclass of collections.defaultdict, if its default_factory is set
497 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000498
499- Fixed a minor memory leak in dictobject.c. The content of the free
500 list was not freed on interpreter shutdown.
501
Georg Brandl52b92cc2008-05-25 09:43:03 +0000502- Limit free list of method and builtin function objects to 256
503 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000504
Georg Brandl52b92cc2008-05-25 09:43:03 +0000505- Patch #1953: Added ``sys._compact_freelists()`` and the C API
506 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000507 to compact the internal free lists of pre-allocted ints and floats.
508
509- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000510 Python expected the return type int but the fork familie returns
511 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000512
Georg Brandl52b92cc2008-05-25 09:43:03 +0000513- Issue #1678380: Fix a bug that identifies 0j and -0j when they
514 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000515
Georg Brandl52b92cc2008-05-25 09:43:03 +0000516- Issue #2025: Added tuple.count() and tuple.index() methods to comply
517 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000518
Georg Brandl52b92cc2008-05-25 09:43:03 +0000519- Fixed multiple reinitialization of the Python interpreter. The small
520 int list in longobject.c has caused a seg fault during the third
521 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000522
Georg Brandl52b92cc2008-05-25 09:43:03 +0000523- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000524
Georg Brandl52b92cc2008-05-25 09:43:03 +0000525- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000526
Georg Brandl52b92cc2008-05-25 09:43:03 +0000527- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000528
Georg Brandl52b92cc2008-05-25 09:43:03 +0000529- map() no longer accepts None for the first argument. Use zip()
530 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000531
Facundo Batista2336bdd2008-01-19 19:12:01 +0000532- Issue #1769: Now int("- 1") is not allowed any more.
533
Georg Brandl52b92cc2008-05-25 09:43:03 +0000534- Object/longobject.c: long(float('nan')) raises an OverflowError
535 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000536
Georg Brandl52b92cc2008-05-25 09:43:03 +0000537- Issue #1762972: __file__ points to the source file instead of the
538 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000539
Guido van Rossumab078dd2008-01-06 00:09:11 +0000540- Issue #1393: object_richcompare() returns NotImplemented instead of
541 False if the objects aren't equal, to give the other side a chance.
542
Guido van Rossume239b002008-01-06 00:44:20 +0000543- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000544
Georg Brandl52b92cc2008-05-25 09:43:03 +0000545- Improve some exception messages when Windows fails to load an
546 extension module. Now we get for example '%1 is not a valid Win32
547 application' instead of 'error code 193'. Also use Unicode strings
548 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000549
Georg Brandl52b92cc2008-05-25 09:43:03 +0000550- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
551 Python C API has gained a new type *PyInstanceMethod_Type* and the
552 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
553 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000554
Georg Brandl52b92cc2008-05-25 09:43:03 +0000555- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
556 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
557 are now enough to print the corresponding list of objects considered
558 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000559
Georg Brandl52b92cc2008-05-25 09:43:03 +0000560- Issue #1573: Improper use of the keyword-only syntax makes the
561 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000562
Georg Brandl52b92cc2008-05-25 09:43:03 +0000563- Issue #1564: The set implementation should special-case PyUnicode
564 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000565
Guido van Rossumea6775b2008-02-21 20:16:31 +0000566- Patch #1031213: Decode source line in SyntaxErrors back to its
567 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000568
Christian Heimes09aaa882008-02-23 15:01:06 +0000569- inspect.getsource() includes the decorators again.
570
Guido van Rossumea6775b2008-02-21 20:16:31 +0000571- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
572 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000573
Georg Brandl52b92cc2008-05-25 09:43:03 +0000574- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
575 the first chunk fed to the decoder started with a BOM, but was
576 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000577
Christian Heimesbc873412007-12-08 22:11:32 +0000578Extension Modules
579-----------------
580
Georg Brandl52b92cc2008-05-25 09:43:03 +0000581- Code for itertools ifilter(), imap(), and izip() moved to bultins
582 and renamed to filter(), map(), and zip(). Also, renamed
583 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000584
Georg Brandl52b92cc2008-05-25 09:43:03 +0000585- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000586
Georg Brandl52b92cc2008-05-25 09:43:03 +0000587- Bug #2111: mmap segfaults when trying to write a block opened with
588 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000589
Georg Brandl52b92cc2008-05-25 09:43:03 +0000590- Issue #2063: correct order of utime and stime in os.times() result
591 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000592
Christian Heimesbc873412007-12-08 22:11:32 +0000593Library
594-------
595
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000596- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000597
Georg Brandl52b92cc2008-05-25 09:43:03 +0000598- Created new UserDict class in collections module. This one inherits
599 from and complies with the MutableMapping ABC. Also, moved
600 UserString and UserList to the collections module. The
601 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000602
Guido van Rossumea6775b2008-02-21 20:16:31 +0000603- Removed UserDict.DictMixin. Replaced all its uses with
604 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000605
Guido van Rossume239b002008-01-06 00:44:20 +0000606- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000607
Guido van Rossume239b002008-01-06 00:44:20 +0000608- Issue #1585: IDLE uses non-existent xrange() function.
609
610- Issue #1578: Problems in win_getpass.
611
Georg Brandl52d168a2008-01-07 18:10:24 +0000612Build
613-----
614
Georg Brandl52b92cc2008-05-25 09:43:03 +0000615- Renamed --enable-unicode configure flag to --with-wide-unicode,
616 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000617
Guido van Rossume239b002008-01-06 00:44:20 +0000618C API
619-----
620
621- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
622 Py_TYPE and Py_REFCNT.
623
Georg Brandl52b92cc2008-05-25 09:43:03 +0000624- New API PyImport_ImportModuleNoBlock(), works like
625 PyImport_ImportModule() but won't block on the import lock
626 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000627
Christian Heimesbc873412007-12-08 22:11:32 +0000628
Fred Drake0e474a82007-10-11 18:01:43 +0000629What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000630===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000631
Guido van Rossum99533a92007-12-06 05:07:41 +0000632*Release date: 07-Dec-2007*
633
634(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000635
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000636Core and Builtins
637-----------------
638
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000639- str8 now has the same construction signature as bytes.
640
Georg Brandl52b92cc2008-05-25 09:43:03 +0000641- Comparisons between str and str8 now return False/True for ==/!=.
642 sqlite3 returns str8 when recreating on object from it's __conform__
643 value. The struct module returns str8 for all string-related
644 formats. This was true before this change, but becomes more
645 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000646
Georg Brandl52b92cc2008-05-25 09:43:03 +0000647- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
648 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000649
650- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
651
652- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000653 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000654 `PyUnicode_DecodeFSDefault(char*)` was added.
655
Georg Brandl52b92cc2008-05-25 09:43:03 +0000656- io.open() and _fileio.FileIO have grown a new argument closefd. A
657 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000658
Georg Brandl52b92cc2008-05-25 09:43:03 +0000659- Added a new option -b to issues warnings (-bb for errors) about
660 certain operations between bytes/buffer and str like str(b'') and
661 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000662
Georg Brandl52b92cc2008-05-25 09:43:03 +0000663- The standards streams sys.stdin, stdout and stderr may be None when
664 the when the C runtime library returns an invalid file descriptor
665 for the streams (fileno(stdin) < 0). For now this happens only for
666 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000667
Christian Heimesbce52be2007-11-17 19:08:41 +0000668- Added PCbuild9 directory for VS 2008.
669
Georg Brandl52b92cc2008-05-25 09:43:03 +0000670- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
671 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000672
Georg Brandl52b92cc2008-05-25 09:43:03 +0000673- Unbound methods are gone for good. ClassObject.method returns an
674 ordinary function object, instance.method still returns a bound
675 method object. The API of bound methods is cleaned up, too. The
676 im_class attribute is removed and im_func + im_self are renamed to
677 __func__ and __self__. The factory PyMethod_New takes only func and
678 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000679
Georg Brandl52b92cc2008-05-25 09:43:03 +0000680- intobject.h is no longer included by Python.h. The remains were
681 moved to longobject.h. It still exists to define several aliases
682 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000683
Christian Heimesa37d4c62007-12-04 23:02:19 +0000684- Removed sys.maxint, use sys.maxsize instead.
685
Fred Drake0e474a82007-10-11 18:01:43 +0000686Extension Modules
687-----------------
688
689- The `hotshot` profiler has been removed; use `cProfile` instead.
690
Brett Cannone9fd2312007-10-12 19:18:19 +0000691Library
692-------
693
Georg Brandl52b92cc2008-05-25 09:43:03 +0000694- When loading an external file using testfile(), the passed-in
695 encoding argument was being ignored if __loader__ is defined and
696 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000697
Georg Brandl52b92cc2008-05-25 09:43:03 +0000698- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
699 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000700
Christian Heimesc9543e42007-11-28 08:28:28 +0000701- Removed the 'new' module.
702
Georg Brandl52b92cc2008-05-25 09:43:03 +0000703- Removed all types from the 'types' module that are easily accessable
704 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000705
Georg Brandl52d168a2008-01-07 18:10:24 +0000706
Guido van Rossum4405cf32007-08-30 17:16:55 +0000707What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000708==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000709
Guido van Rossum4405cf32007-08-30 17:16:55 +0000710*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000711
712Core and Builtins
713-----------------
714
Martin v. Löwis47383402007-08-15 07:32:56 +0000715- PEP 3131: Support non-ASCII identifiers.
716
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000717- PEP 3120: Change default encoding to UTF-8.
718
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000719- PEP 3123: Use proper C inheritance for PyObject.
720
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000721- Removed the __oct__ and __hex__ special methods and added a bin()
722 builtin function.
723
Georg Brandl52b92cc2008-05-25 09:43:03 +0000724- PEP 3127: octal literals now start with "0o". Old-style octal
725 literals are invalid. There are binary literals with a prefix of
726 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000727
Guido van Rossume7ba4952007-06-06 23:52:48 +0000728- None, True, False are now keywords.
729
Guido van Rossum29478ef2007-05-29 00:39:44 +0000730- PEP 3119: isinstance() and issubclass() can be overridden.
731
Guido van Rossumebe3e162007-05-17 18:20:34 +0000732- Remove BaseException.message.
733
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000734- Remove tuple parameter unpacking (PEP 3113).
735
Georg Brandl52b92cc2008-05-25 09:43:03 +0000736- Remove the f_restricted attribute from frames. This naturally leads
737 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000738
Georg Brandl52b92cc2008-05-25 09:43:03 +0000739- PEP 3132 was accepted. That means that you can do ``a, *b =
740 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000741
Georg Brandl52b92cc2008-05-25 09:43:03 +0000742- range() now returns an iterator rather than a list. Floats are not
743 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000744
Nick Coghlan650f0d02007-04-15 12:05:43 +0000745- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000746 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000747
Guido van Rossume27dc722007-03-27 22:37:34 +0000748- By default, != returns the opposite of ==, unless the latter returns
749 NotImplemented.
750
Georg Brandl52b92cc2008-05-25 09:43:03 +0000751- Patch #1680961: sys.exitfunc has been removed and replaced with a
752 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000753
Georg Brandl801dd732007-03-18 20:18:31 +0000754- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000755 keyword arg in the class statement, which can now use the full
756 syntax of a parameter list. Also, the metaclass can implement a
757 __prepare__ function which will be called to create the dictionary
758 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000759
Georg Brandl428f0642007-03-18 18:35:15 +0000760- The long-deprecated argument "pend" of PyFloat_FromString() has been
761 removed.
762
Georg Brandle32b4222007-03-10 22:13:27 +0000763- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000764 its argument, if it exists. If not, it will work like before. This
765 allows customizing the output of dir() in the presence of a
766 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000767
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000768- Removed support for __members__ and __methods__.
769
Georg Brandle32b4222007-03-10 22:13:27 +0000770- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000771
Georg Brandle32b4222007-03-10 22:13:27 +0000772- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000773 functionality formerly known as raw_input(); the name raw_input() is
774 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000775
Georg Brandl52b92cc2008-05-25 09:43:03 +0000776- Classes listed in an 'except' clause must inherit from
777 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000778
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000779- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000780 and .keys(), .items(), .values() return dict views, which behave
781 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000782
Guido van Rossum8b545362007-02-09 23:52:14 +0000783- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000784 'softspace' attribute of files is now gone (since print() doesn't
785 use it). A side effect of this change is that you can get
786 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000787
788 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000789 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000790
791 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000792
Brett Cannon398db8b2007-01-29 23:44:37 +0000793- PEP 3102: keyword-only arguments.
794
Georg Brandl52b92cc2008-05-25 09:43:03 +0000795- Int/Long unification is complete. The 'long' built-in type and
796 literals with trailing 'L' or 'l' have been removed. Performance
797 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000798
799- 'except E, V' must now be spelled as 'except E as V' and deletes V
800 at the end of the except clause; V must be a simple name.
801
Neal Norwitzc1505362006-12-28 06:47:50 +0000802- Added function annotations per PEP 3107.
803
Georg Brandl52b92cc2008-05-25 09:43:03 +0000804- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000805
806 >>> def f(x):
807 ... def inc():
808 ... nonlocal x
809 ... x += 1
810 ... return x
811 ... return inc
812 ...
813 >>> inc = f(0)
814 >>> inc()
815 1
816 >>> inc()
817 2
818
Georg Brandl66a796e2006-12-19 20:50:34 +0000819- Moved intern() to sys.intern().
820
821- exec is now a function.
822
823- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000824
Neal Norwitz4886cc32006-08-21 17:06:07 +0000825- Classic classes are a thing of the past. All classes are new style.
826
827- Exceptions *must* derive from BaseException.
828
829- Integer division always returns a float. The -Q option is no more.
830 All the following are gone:
831 * PyNumber_Divide and PyNumber_InPlaceDivide
832 * __div__, __rdiv__, and __idiv__
833 * nb_divide, nb_inplace_divide
834 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
835 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
836 if we want to re-use __div__ and friends. If we do, it will make
837 it harder to write code for both 2.x and 3.x.)
838
839- 'as' and 'with' are keywords.
840
841- Absolute import is the default behavior for 'import foo' etc.
842
Georg Brandl52b92cc2008-05-25 09:43:03 +0000843- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000844
Georg Brandl52b92cc2008-05-25 09:43:03 +0000845- Removed these Python builtins: apply(), callable(), coerce(),
846 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000847
Georg Brandl52b92cc2008-05-25 09:43:03 +0000848- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000849
Georg Brandl52b92cc2008-05-25 09:43:03 +0000850- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000851
852- Remove C API support for restricted execution.
853
Guido van Rossumcf1be882007-08-30 22:07:17 +0000854- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000855 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000856 sequences of unequal length -- it now stops after the shortest one
857 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000858
Georg Brandl52b92cc2008-05-25 09:43:03 +0000859- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000860
861- Added class decorators per PEP 3129.
862
863
864Extension Modules
865-----------------
866
Georg Brandl52b92cc2008-05-25 09:43:03 +0000867- Removed the imageop module. Obsolete long with its unit tests
868 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000869
Georg Brandl52b92cc2008-05-25 09:43:03 +0000870- Removed these attributes from the operator module: div, idiv,
871 __div__, __idiv__, isCallable, sequenceIncludes.
872
873- Removed these attributes from the sys module: exc_clear(), exc_type,
874 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000875
876
877Library
878-------
879
Georg Brandl52b92cc2008-05-25 09:43:03 +0000880- Removed the compiler package. Use of the _ast module and (an
881 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000882
Georg Brandl52b92cc2008-05-25 09:43:03 +0000883- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
884 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
885 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000886
Georg Brandl52b92cc2008-05-25 09:43:03 +0000887- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000888
Georg Brandl52b92cc2008-05-25 09:43:03 +0000889- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
890 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
891 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000892
Georg Brandl52b92cc2008-05-25 09:43:03 +0000893- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000894
Georg Brandl52b92cc2008-05-25 09:43:03 +0000895- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000896 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000897
Georg Brandl52b92cc2008-05-25 09:43:03 +0000898- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000899
Georg Brandl52b92cc2008-05-25 09:43:03 +0000900- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000901
902- Patch #1680961: atexit has been reimplemented in C.
903
Walter Dörwald41980ca2007-08-16 21:55:45 +0000904- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
905
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000906Build
907-----
908
909C API
910-----
911
Georg Brandl52b92cc2008-05-25 09:43:03 +0000912- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000913
Georg Brandl52b92cc2008-05-25 09:43:03 +0000914- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
915 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000916
Georg Brandl52b92cc2008-05-25 09:43:03 +0000917- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000918
Georg Brandl52b92cc2008-05-25 09:43:03 +0000919- Removed these macros: staticforward, statichere, PyArg_GetInt,
920 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000921
Georg Brandl52b92cc2008-05-25 09:43:03 +0000922- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
923 intintobjargproc, getreadbufferproc, getwritebufferproc,
924 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000925
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000926Tests
927-----
928
Brett Cannone7a30f72008-03-03 03:36:27 +0000929- Removed test.testall as test.regrtest replaces it.
930
Brett Cannonced04e02005-02-13 22:53:22 +0000931Documentation
932-------------
933
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000934Mac
935---
936
Georg Brandl52b92cc2008-05-25 09:43:03 +0000937- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +0000938
Guido van Rossum845702c2007-08-30 18:44:53 +0000939Platforms
940---------
941
942- Support for BeOS and AtheOS was removed (according to PEP 11).
943
944- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
945
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000946Tools/Demos
947-----------
948
Georg Brandl52b92cc2008-05-25 09:43:03 +0000949
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000950**(For information about older versions, consult the HISTORY file.)**