blob: 0ef8b05ceede01d80cb7b3a698d71abc39dce376 [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
15- Issue #1819: function calls with several named parameters are now on
16 average 35% faster (as measured by pybench).
17
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000018Library
19-------
20
21- Issue #3394: zipfile.writestr sets external attributes when passed a
22 file name rather than a ZipInfo instance, so files are extracted with
23 mode 0600 rather than 000 under Unix.
24
25
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +000026What's new in Python 3.0b2?
27===========================
28
Barry Warsaw4bd1cef2008-07-18 02:28:44 +000029*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +000030
31Core and Builtins
32-----------------
33
Mark Dickinson65fe25e2008-07-16 11:30:51 +000034- Issue #3008: the float type has a new instance method 'float.hex'
35 and a new class method 'float.fromhex' to convert floating-point
36 numbers to and from hexadecimal strings, respectively.
37
Eric Smithd68af8f2008-07-16 00:15:35 +000038- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
39 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
40
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +000041- Issue #3280: like chr(), the "%c" format now accepts unicode code points
42 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
43 "narrow Unicode" builds, the result is a string of 2 code units, forming a
44 UTF-16 surrogate pair.
45
Georg Brandld52429f2008-07-04 15:55:02 +000046- Issue #3282: str.isprintable() should return False for undefined
47 Unicode characters.
48
Martin v. Löwis029656f2008-06-30 04:06:08 +000049- Issue #3236: Return small longs from PyLong_FromString.
50
Benjamin Petersone6528212008-07-15 15:32:09 +000051- Exception tracebacks now support exception chaining.
52
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +000053Library
54-------
55
Brett Cannonc2542e92008-07-25 18:19:20 +000056- Removed the sunaudio module. Use sunau instead.
57
Georg Brandl30704ea02008-07-23 15:07:12 +000058- Removed "ast" function aliases from the parser module.
59
Thomas Heller15383a02008-07-15 19:46:52 +000060- Issue #3313: Fixed a crash when a failed dlopen() call does not set
61 a valid dlerror() message.
62
Thomas Heller0261e1e2008-07-15 17:25:07 +000063- Issue #3258: Fixed a crash when a ctypes POINTER type to an
64 incomplete structure was created.
65
Georg Brandl1abcbf82008-07-01 19:28:43 +000066- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
67 argument now must be a bytes object in any case.
68
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +000069- Issue #3145: help("modules whatever") failed when trying to load the source
70 code of every single module of the standard library, including invalid files
71 used in the test suite.
72
Georg Brandlbded4d32008-07-17 18:15:35 +000073- The gettext library now consistently uses Unicode strings for message ids
74 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +000075
Benjamin Petersone6528212008-07-15 15:32:09 +000076- The traceback module has been expanded to handle chained exceptions.
77
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +000078C API
79-----
80
81- Issue #3247: the function Py_FindMethod was removed. Modern types should
82 use the tp_methods slot instead.
83
Benjamin Petersonde9c8692008-07-01 18:23:09 +000084Tools/Demos
85-----------
86
Georg Brandl336341f2008-07-01 20:21:28 +000087- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +000088
Georg Brandl336341f2008-07-01 20:21:28 +000089- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +000090
91
Brett Cannon0d71ee72008-05-08 18:13:40 +000092What's new in Python 3.0b1?
93===========================
94
Barry Warsawc1e689e2008-06-19 00:35:43 +000095*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +000096
97Core and Builtins
98-----------------
99
Brett Cannondb734912008-06-27 00:52:15 +0000100- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
101 argument being anything other than a dict or None. Also fixed a bug in error
102 handling when 'message' and 'category' were both set to None, triggering a
103 bus error.
104
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000105- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
106 holds the last (strong) reference to its referent.
107
Georg Brandl559e5d72008-06-11 18:37:52 +0000108- Issue #2630: implement PEP 3138. repr() now returns printable
109 Unicode characters unescaped, to get an ASCII-only representation
110 of an object use ascii().
111
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000112- Issue #1342: On windows, Python could not start when installed in a
113 directory with non-ascii characters.
114
Martin v. Löwis1a214512008-06-11 05:26:20 +0000115- Implement PEP 3121: new module initialization and finalization API.
116
Georg Brandle1b5ac62008-06-04 13:06:58 +0000117- Removed the already-defunct ``-t`` option.
118
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000119- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
120 unmarshalling many code objects, which happens when importing a
121 large .pyc file (~1000 functions).
122
Georg Brandl52b92cc2008-05-25 09:43:03 +0000123- Issue #2963: fix merging oversight that disabled method cache for
124 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000125
Georg Brandlc9b09532008-05-25 09:24:38 +0000126- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
127
Georg Brandl52b92cc2008-05-25 09:43:03 +0000128- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000129
Georg Brandl52b92cc2008-05-25 09:43:03 +0000130- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
131 code now allows any unicode string and returns a utf-8 encoded
132 buffer, just like the "s#" code already does. The "z" code was
133 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000134
Georg Brandl52b92cc2008-05-25 09:43:03 +0000135- Issue #2863: generators now have a ``gen.__name__`` attribute that
136 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
137 ``func.func_code.co_name``. The repr() of a generator now also
138 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000139
140- Issue #2831: enumerate() now has a ``start`` argument.
141
Georg Brandl52b92cc2008-05-25 09:43:03 +0000142- Issue #2801: fix bug in the float.is_integer method where a
143 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000144
Georg Brandl52b92cc2008-05-25 09:43:03 +0000145- The ``--with-toolbox-glue`` option (and the associated
146 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000147
Georg Brandl52b92cc2008-05-25 09:43:03 +0000148- Issue #2196: hasattr() now lets exceptions which do not inherit
149 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
150 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000151
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000152- #3021 Exception reraising sematics have been significantly improved. However,
153 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
154 code anymore.
155
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000156- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
157 removed.
158
Brett Cannon0d71ee72008-05-08 18:13:40 +0000159Extension Modules
160-----------------
161
Georg Brandl38feaf02008-05-25 07:45:51 +0000162- Renamed ``_winreg`` module to ``winreg``.
163
Georg Brandl52b92cc2008-05-25 09:43:03 +0000164- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
165 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000166
167- Support for Windows 9x has been removed from the winsound module.
168
Georg Brandl52b92cc2008-05-25 09:43:03 +0000169- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000170
Brett Cannon0d71ee72008-05-08 18:13:40 +0000171Library
172-------
173
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000174- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
175
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000176- a new ``urllib`` package was created. It consists of code from
177 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
178 modules have all been removed. The new package has five submodules:
179 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
180 ``urllib.error``, and ``urllib.robotparser``. The
181 ``urllib.request.urlopen()`` function uses the url opener from
182 ``urllib2``. (Note that the unittests have not been renamed for the
183 beta, but they will be renamed in the future.)
184
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000185- rfc822 has been removed in favor of the email package.
186
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000187- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000188
Barry Warsawf5019422008-06-12 02:42:00 +0000189- Patch #2849: Remove use of rfc822 module from standard library.
190
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000191- Added C optimized implementation of io.StringIO.
192
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000193- The ``pickle`` module is now automatically use an optimized C
194 implementation of Pickler and Unpickler when available. The
195 ``cPickle`` module is no longer needed.
196
Georg Brandl877b10a2008-06-01 21:25:55 +0000197- Removed the ``htmllib`` and ``sgmllib`` modules.
198
Georg Brandl61013952008-05-28 15:56:30 +0000199- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
200 been removed from ``http.cookies``.
201
Brett Cannona23810f2008-05-26 19:04:21 +0000202- The ``commands`` module has been removed. Its getoutput() and
203 getstatusoutput() functions have been moved to the ``subprocess`` module.
204
Georg Brandl3d5c4252008-05-26 18:03:26 +0000205- The ``http`` package was created; it contains the old ``httplib``
206 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
207 as ``http.cookiejar``, and the content of the three ``HTTPServer``
208 modules as ``http.server``.
209
Georg Brandl38eceaa2008-05-26 11:14:17 +0000210- The ``xmlrpc`` package was created; it contains the old
211 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
212 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000213 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000214
215- The ``dbm`` package was created, containing the old modules
216 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
217 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
218 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
219 as submodules.
220
Georg Brandl52b92cc2008-05-25 09:43:03 +0000221- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000222
Georg Brandl52b92cc2008-05-25 09:43:03 +0000223- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000224
Georg Brandl52b92cc2008-05-25 09:43:03 +0000225- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000226
Georg Brandl52b92cc2008-05-25 09:43:03 +0000227- Issue #2250: Exceptions raised during evaluation of names in
228 rlcompleter's ``Completer.complete()`` method are now caught and
229 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000230
Georg Brandl52b92cc2008-05-25 09:43:03 +0000231- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
232 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000233
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000234- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
235 large to fit in a C long. ldexp(x, n) now returns a zero (with
236 suitable sign) if n is large and negative; previously, it raised
237 OverflowError.
238
Georg Brandl52b92cc2008-05-25 09:43:03 +0000239- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000240
Georg Brandl52b92cc2008-05-25 09:43:03 +0000241- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000242
Georg Brandl52b92cc2008-05-25 09:43:03 +0000243- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000244
Georg Brandl52b92cc2008-05-25 09:43:03 +0000245- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000246
Georg Brandl52b92cc2008-05-25 09:43:03 +0000247- Fixed the ``__all__`` setting on ``collections`` to include
248 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000249
Brett Cannoncf3520c2008-05-11 22:47:58 +0000250- The sre module has been removed.
251
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000252- The Queue module has been renamed to queue.
253
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000254- The copy_reg module has been renamed to copyreg.
255
Brett Cannond8b61ee2008-05-11 03:00:26 +0000256- The mhlib module has been removed.
257
Brett Cannonbd474422008-05-10 22:42:14 +0000258- The ihooks module has been removed.
259
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000260- The fpformat module has been removed.
261
Brett Cannonf4fd9932008-05-10 21:11:46 +0000262- The dircache module has been removed.
263
Brett Cannond175b4c2008-05-10 03:19:54 +0000264- The Canvas module has been removed.
265
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000266- The Decimal module gained the magic methods __round__, __ceil__,
267 __floor__ and __trunc__, to give support for round, math.ceil,
268 math.floor and math.trunc.
269
Brett Cannon900ee3a2008-05-08 20:31:11 +0000270- The user module has been removed.
271
Brett Cannon34afe872008-05-08 20:31:44 +0000272- The mutex module has been removed.
273
Brett Cannon0d71ee72008-05-08 18:13:40 +0000274- The imputil module has been removed.
275
Georg Brandl52b92cc2008-05-25 09:43:03 +0000276- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000277
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000278- pdb gained the "until" command.
279
Georg Brandl52b92cc2008-05-25 09:43:03 +0000280- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000281
Georg Brandlf9926402008-06-13 06:32:25 +0000282- The threading module API was renamed to be PEP 8 complaint.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000283
Georg Brandl294d5a92008-06-01 19:25:32 +0000284Tools/Demos
285-----------
286
287- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000288
Brett Cannon0d71ee72008-05-08 18:13:40 +0000289Build
290-----
291
292
Barry Warsaw66079cd2008-04-04 01:36:36 +0000293What's New in Python 3.0a5?
294===========================
295
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000296*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000297
298Core and Builtins
299-----------------
300
Georg Brandl52b92cc2008-05-25 09:43:03 +0000301- Fixed misbehaviour of PyLong_FromSsize_t on systems where
302 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000303
Georg Brandl52b92cc2008-05-25 09:43:03 +0000304- Issue #2221: Corrected a SystemError "error return without exception
305 set", when the code executed by exec() raises an exception, and
306 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000307
Georg Brandl52b92cc2008-05-25 09:43:03 +0000308- Bug #2565: The repr() of type objects now calls them 'class', not
309 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000310
Martin v. Löwis790465f2008-04-05 20:41:37 +0000311- The command line processing was converted to pass Unicode strings
312 through as unmodified as possible; as a consequence, the C API
313 related to command line arguments was changed to use wchar_t.
314
Georg Brandl52b92cc2008-05-25 09:43:03 +0000315- All backslashes in raw strings are interpreted literally. This
316 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000317
Barry Warsaw66079cd2008-04-04 01:36:36 +0000318Extension Modules
319-----------------
320
321Library
322-------
323
Georg Brandl52b92cc2008-05-25 09:43:03 +0000324- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000325
Thomas Hellere106dc32008-04-24 18:39:36 +0000326- Issue #2682: ctypes callback functions now longer contain a cyclic
327 reference to themselves.
328
Georg Brandl52b92cc2008-05-25 09:43:03 +0000329- Issue #2058: Remove the buf attribute and add __slots__ to the
330 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000331
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000332- Bug #2606: Avoid calling .sort() on a dict_keys object.
333
Thomas Hellerbff533b2008-04-04 19:53:14 +0000334- The bundled libffi copy is now in sync with the recently released
335 libffi3.0.5 version, apart from some small changes to
336 Modules/_ctypes/libffi/configure.ac.
337
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000338Build
339-----
340
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000341- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
342
Guido van Rossumdc21db32008-04-07 18:37:41 +0000343- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000344 accidentally overwriting a Python 2.x installation. Use "make
345 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000346
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000347- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
348 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000349
Georg Brandl52b92cc2008-05-25 09:43:03 +0000350
Barry Warsawa9d499d2008-03-01 18:38:07 +0000351What's New in Python 3.0a4?
352===========================
353
Barry Warsawbb5cd082008-04-02 23:33:27 +0000354*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000355
Martin v. Löwis25931462008-03-17 20:43:42 +0000356Core and Builtins
357-----------------
358
359- Bug #2301: Don't try decoding the source code into the original
360 encoding for syntax errors.
361
Martin v. Löwis92fab752008-03-08 10:40:41 +0000362Extension Modules
363-----------------
364
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000365- The dl module was removed, use the ctypes module instead.
366
Martin v. Löwis92fab752008-03-08 10:40:41 +0000367- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000368
Martin v. Löwis071ef772008-03-08 11:24:24 +0000369Library
370-------
371
Georg Brandl52b92cc2008-05-25 09:43:03 +0000372- The class distutils.commands.build_py.build_py_2to3 can be used as a
373 build_py replacement to automatically run 2to3 on modules that are
374 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000375
Guido van Rossumf4169812008-03-17 22:56:06 +0000376- A new pickle protocol (protocol 3) is added with explicit support
377 for bytes. This is the default protocol. It intentionally cannot
378 be unpickled by Python 2.x.
379
380- When a pickle written by Python 2.x contains an (8-bit) str
381 instance, this is now decoded to a (Unicode) str instance. The
382 encoding used to do this defaults to ASCII, but can be overridden
383 via two new keyword arguments to the Unpickler class. Previously
384 this would create bytes instances, which is usually wrong: str
385 instances are often used to pickle attribute names etc., and text is
386 more common than binary data anyway.
387
Martin v. Löwis071ef772008-03-08 11:24:24 +0000388- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000389 system doesn't support CODESET and LANG isn't set or doesn't allow
390 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000391
Georg Brandl52b92cc2008-05-25 09:43:03 +0000392- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
393 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000394
Georg Brandl52b92cc2008-05-25 09:43:03 +0000395- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
396 has been renamed tokenize and now works with bytes rather than
397 strings. A new detect_encoding function has been added for
398 determining source file encoding according to PEP-0263. Token
399 sequences returned by tokenize always start with an ENCODING token
400 which specifies the encoding used to decode the file. This token is
401 used to encode the output of untokenize back to bytes.
402
Barry Warsawa9d499d2008-03-01 18:38:07 +0000403
Christian Heimesbc873412007-12-08 22:11:32 +0000404What's New in Python 3.0a3?
405===========================
406
Barry Warsaw659fc422008-03-01 17:45:23 +0000407*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000408
409Core and Builtins
410-----------------
411
Georg Brandl52b92cc2008-05-25 09:43:03 +0000412- Issue #2282: io.TextIOWrapper was not overriding seekable() from
413 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000414
Georg Brandl52b92cc2008-05-25 09:43:03 +0000415- Issue #2115: Important speedup in setting __slot__ attributes. Also
416 prevent a possible crash: an Abstract Base Class would try to access
417 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000418
Georg Brandl52b92cc2008-05-25 09:43:03 +0000419- Fixed repr() and str() of complex numbers with infinity or nan as
420 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000421
Georg Brandl52b92cc2008-05-25 09:43:03 +0000422- Clear all free list during a gc.collect() of the highest generation
423 in order to allow pymalloc to free more arenas. Python may give back
424 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000425
Georg Brandl52b92cc2008-05-25 09:43:03 +0000426- Issue #2045: Fix an infinite recursion triggered when printing a
427 subclass of collections.defaultdict, if its default_factory is set
428 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000429
430- Fixed a minor memory leak in dictobject.c. The content of the free
431 list was not freed on interpreter shutdown.
432
Georg Brandl52b92cc2008-05-25 09:43:03 +0000433- Limit free list of method and builtin function objects to 256
434 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000435
Georg Brandl52b92cc2008-05-25 09:43:03 +0000436- Patch #1953: Added ``sys._compact_freelists()`` and the C API
437 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000438 to compact the internal free lists of pre-allocted ints and floats.
439
440- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000441 Python expected the return type int but the fork familie returns
442 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000443
Georg Brandl52b92cc2008-05-25 09:43:03 +0000444- Issue #1678380: Fix a bug that identifies 0j and -0j when they
445 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000446
Georg Brandl52b92cc2008-05-25 09:43:03 +0000447- Issue #2025: Added tuple.count() and tuple.index() methods to comply
448 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000449
Georg Brandl52b92cc2008-05-25 09:43:03 +0000450- Fixed multiple reinitialization of the Python interpreter. The small
451 int list in longobject.c has caused a seg fault during the third
452 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000453
Georg Brandl52b92cc2008-05-25 09:43:03 +0000454- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000455
Georg Brandl52b92cc2008-05-25 09:43:03 +0000456- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000457
Georg Brandl52b92cc2008-05-25 09:43:03 +0000458- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000459
Georg Brandl52b92cc2008-05-25 09:43:03 +0000460- map() no longer accepts None for the first argument. Use zip()
461 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000462
Facundo Batista2336bdd2008-01-19 19:12:01 +0000463- Issue #1769: Now int("- 1") is not allowed any more.
464
Georg Brandl52b92cc2008-05-25 09:43:03 +0000465- Object/longobject.c: long(float('nan')) raises an OverflowError
466 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000467
Georg Brandl52b92cc2008-05-25 09:43:03 +0000468- Issue #1762972: __file__ points to the source file instead of the
469 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000470
Guido van Rossumab078dd2008-01-06 00:09:11 +0000471- Issue #1393: object_richcompare() returns NotImplemented instead of
472 False if the objects aren't equal, to give the other side a chance.
473
Guido van Rossume239b002008-01-06 00:44:20 +0000474- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000475
Georg Brandl52b92cc2008-05-25 09:43:03 +0000476- Improve some exception messages when Windows fails to load an
477 extension module. Now we get for example '%1 is not a valid Win32
478 application' instead of 'error code 193'. Also use Unicode strings
479 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000480
Georg Brandl52b92cc2008-05-25 09:43:03 +0000481- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
482 Python C API has gained a new type *PyInstanceMethod_Type* and the
483 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
484 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000485
Georg Brandl52b92cc2008-05-25 09:43:03 +0000486- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
487 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
488 are now enough to print the corresponding list of objects considered
489 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000490
Georg Brandl52b92cc2008-05-25 09:43:03 +0000491- Issue #1573: Improper use of the keyword-only syntax makes the
492 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000493
Georg Brandl52b92cc2008-05-25 09:43:03 +0000494- Issue #1564: The set implementation should special-case PyUnicode
495 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000496
Guido van Rossumea6775b2008-02-21 20:16:31 +0000497- Patch #1031213: Decode source line in SyntaxErrors back to its
498 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000499
Christian Heimes09aaa882008-02-23 15:01:06 +0000500- inspect.getsource() includes the decorators again.
501
Guido van Rossumea6775b2008-02-21 20:16:31 +0000502- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
503 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000504
Georg Brandl52b92cc2008-05-25 09:43:03 +0000505- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
506 the first chunk fed to the decoder started with a BOM, but was
507 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000508
Christian Heimesbc873412007-12-08 22:11:32 +0000509Extension Modules
510-----------------
511
Georg Brandl52b92cc2008-05-25 09:43:03 +0000512- Code for itertools ifilter(), imap(), and izip() moved to bultins
513 and renamed to filter(), map(), and zip(). Also, renamed
514 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000515
Georg Brandl52b92cc2008-05-25 09:43:03 +0000516- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000517
Georg Brandl52b92cc2008-05-25 09:43:03 +0000518- Bug #2111: mmap segfaults when trying to write a block opened with
519 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000520
Georg Brandl52b92cc2008-05-25 09:43:03 +0000521- Issue #2063: correct order of utime and stime in os.times() result
522 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000523
Christian Heimesbc873412007-12-08 22:11:32 +0000524Library
525-------
526
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000527- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000528
Georg Brandl52b92cc2008-05-25 09:43:03 +0000529- Created new UserDict class in collections module. This one inherits
530 from and complies with the MutableMapping ABC. Also, moved
531 UserString and UserList to the collections module. The
532 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000533
Guido van Rossumea6775b2008-02-21 20:16:31 +0000534- Removed UserDict.DictMixin. Replaced all its uses with
535 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000536
Guido van Rossume239b002008-01-06 00:44:20 +0000537- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000538
Guido van Rossume239b002008-01-06 00:44:20 +0000539- Issue #1585: IDLE uses non-existent xrange() function.
540
541- Issue #1578: Problems in win_getpass.
542
Georg Brandl52d168a2008-01-07 18:10:24 +0000543Build
544-----
545
Georg Brandl52b92cc2008-05-25 09:43:03 +0000546- Renamed --enable-unicode configure flag to --with-wide-unicode,
547 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000548
Guido van Rossume239b002008-01-06 00:44:20 +0000549C API
550-----
551
552- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
553 Py_TYPE and Py_REFCNT.
554
Georg Brandl52b92cc2008-05-25 09:43:03 +0000555- New API PyImport_ImportModuleNoBlock(), works like
556 PyImport_ImportModule() but won't block on the import lock
557 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000558
Christian Heimesbc873412007-12-08 22:11:32 +0000559
Fred Drake0e474a82007-10-11 18:01:43 +0000560What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000561===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000562
Guido van Rossum99533a92007-12-06 05:07:41 +0000563*Release date: 07-Dec-2007*
564
565(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000566
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000567Core and Builtins
568-----------------
569
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000570- str8 now has the same construction signature as bytes.
571
Georg Brandl52b92cc2008-05-25 09:43:03 +0000572- Comparisons between str and str8 now return False/True for ==/!=.
573 sqlite3 returns str8 when recreating on object from it's __conform__
574 value. The struct module returns str8 for all string-related
575 formats. This was true before this change, but becomes more
576 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000577
Georg Brandl52b92cc2008-05-25 09:43:03 +0000578- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
579 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000580
581- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
582
583- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000584 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000585 `PyUnicode_DecodeFSDefault(char*)` was added.
586
Georg Brandl52b92cc2008-05-25 09:43:03 +0000587- io.open() and _fileio.FileIO have grown a new argument closefd. A
588 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000589
Georg Brandl52b92cc2008-05-25 09:43:03 +0000590- Added a new option -b to issues warnings (-bb for errors) about
591 certain operations between bytes/buffer and str like str(b'') and
592 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000593
Georg Brandl52b92cc2008-05-25 09:43:03 +0000594- The standards streams sys.stdin, stdout and stderr may be None when
595 the when the C runtime library returns an invalid file descriptor
596 for the streams (fileno(stdin) < 0). For now this happens only for
597 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000598
Christian Heimesbce52be2007-11-17 19:08:41 +0000599- Added PCbuild9 directory for VS 2008.
600
Georg Brandl52b92cc2008-05-25 09:43:03 +0000601- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
602 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000603
Georg Brandl52b92cc2008-05-25 09:43:03 +0000604- Unbound methods are gone for good. ClassObject.method returns an
605 ordinary function object, instance.method still returns a bound
606 method object. The API of bound methods is cleaned up, too. The
607 im_class attribute is removed and im_func + im_self are renamed to
608 __func__ and __self__. The factory PyMethod_New takes only func and
609 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000610
Georg Brandl52b92cc2008-05-25 09:43:03 +0000611- intobject.h is no longer included by Python.h. The remains were
612 moved to longobject.h. It still exists to define several aliases
613 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000614
Christian Heimesa37d4c62007-12-04 23:02:19 +0000615- Removed sys.maxint, use sys.maxsize instead.
616
Fred Drake0e474a82007-10-11 18:01:43 +0000617Extension Modules
618-----------------
619
620- The `hotshot` profiler has been removed; use `cProfile` instead.
621
Brett Cannone9fd2312007-10-12 19:18:19 +0000622Library
623-------
624
Georg Brandl52b92cc2008-05-25 09:43:03 +0000625- When loading an external file using testfile(), the passed-in
626 encoding argument was being ignored if __loader__ is defined and
627 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000628
Georg Brandl52b92cc2008-05-25 09:43:03 +0000629- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
630 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000631
Christian Heimesc9543e42007-11-28 08:28:28 +0000632- Removed the 'new' module.
633
Georg Brandl52b92cc2008-05-25 09:43:03 +0000634- Removed all types from the 'types' module that are easily accessable
635 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000636
Georg Brandl52d168a2008-01-07 18:10:24 +0000637
Guido van Rossum4405cf32007-08-30 17:16:55 +0000638What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000639==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000640
Guido van Rossum4405cf32007-08-30 17:16:55 +0000641*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000642
643Core and Builtins
644-----------------
645
Martin v. Löwis47383402007-08-15 07:32:56 +0000646- PEP 3131: Support non-ASCII identifiers.
647
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000648- PEP 3120: Change default encoding to UTF-8.
649
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000650- PEP 3123: Use proper C inheritance for PyObject.
651
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000652- Removed the __oct__ and __hex__ special methods and added a bin()
653 builtin function.
654
Georg Brandl52b92cc2008-05-25 09:43:03 +0000655- PEP 3127: octal literals now start with "0o". Old-style octal
656 literals are invalid. There are binary literals with a prefix of
657 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000658
Guido van Rossume7ba4952007-06-06 23:52:48 +0000659- None, True, False are now keywords.
660
Guido van Rossum29478ef2007-05-29 00:39:44 +0000661- PEP 3119: isinstance() and issubclass() can be overridden.
662
Guido van Rossumebe3e162007-05-17 18:20:34 +0000663- Remove BaseException.message.
664
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000665- Remove tuple parameter unpacking (PEP 3113).
666
Georg Brandl52b92cc2008-05-25 09:43:03 +0000667- Remove the f_restricted attribute from frames. This naturally leads
668 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000669
Georg Brandl52b92cc2008-05-25 09:43:03 +0000670- PEP 3132 was accepted. That means that you can do ``a, *b =
671 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000672
Georg Brandl52b92cc2008-05-25 09:43:03 +0000673- range() now returns an iterator rather than a list. Floats are not
674 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000675
Nick Coghlan650f0d02007-04-15 12:05:43 +0000676- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000677 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000678
Guido van Rossume27dc722007-03-27 22:37:34 +0000679- By default, != returns the opposite of ==, unless the latter returns
680 NotImplemented.
681
Georg Brandl52b92cc2008-05-25 09:43:03 +0000682- Patch #1680961: sys.exitfunc has been removed and replaced with a
683 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000684
Georg Brandl801dd732007-03-18 20:18:31 +0000685- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000686 keyword arg in the class statement, which can now use the full
687 syntax of a parameter list. Also, the metaclass can implement a
688 __prepare__ function which will be called to create the dictionary
689 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000690
Georg Brandl428f0642007-03-18 18:35:15 +0000691- The long-deprecated argument "pend" of PyFloat_FromString() has been
692 removed.
693
Georg Brandle32b4222007-03-10 22:13:27 +0000694- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000695 its argument, if it exists. If not, it will work like before. This
696 allows customizing the output of dir() in the presence of a
697 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000698
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000699- Removed support for __members__ and __methods__.
700
Georg Brandle32b4222007-03-10 22:13:27 +0000701- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000702
Georg Brandle32b4222007-03-10 22:13:27 +0000703- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000704 functionality formerly known as raw_input(); the name raw_input() is
705 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000706
Georg Brandl52b92cc2008-05-25 09:43:03 +0000707- Classes listed in an 'except' clause must inherit from
708 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000709
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000710- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000711 and .keys(), .items(), .values() return dict views, which behave
712 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000713
Guido van Rossum8b545362007-02-09 23:52:14 +0000714- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000715 'softspace' attribute of files is now gone (since print() doesn't
716 use it). A side effect of this change is that you can get
717 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000718
719 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000720 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000721
722 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000723
Brett Cannon398db8b2007-01-29 23:44:37 +0000724- PEP 3102: keyword-only arguments.
725
Georg Brandl52b92cc2008-05-25 09:43:03 +0000726- Int/Long unification is complete. The 'long' built-in type and
727 literals with trailing 'L' or 'l' have been removed. Performance
728 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000729
730- 'except E, V' must now be spelled as 'except E as V' and deletes V
731 at the end of the except clause; V must be a simple name.
732
Neal Norwitzc1505362006-12-28 06:47:50 +0000733- Added function annotations per PEP 3107.
734
Georg Brandl52b92cc2008-05-25 09:43:03 +0000735- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000736
737 >>> def f(x):
738 ... def inc():
739 ... nonlocal x
740 ... x += 1
741 ... return x
742 ... return inc
743 ...
744 >>> inc = f(0)
745 >>> inc()
746 1
747 >>> inc()
748 2
749
Georg Brandl66a796e2006-12-19 20:50:34 +0000750- Moved intern() to sys.intern().
751
752- exec is now a function.
753
754- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000755
Neal Norwitz4886cc32006-08-21 17:06:07 +0000756- Classic classes are a thing of the past. All classes are new style.
757
758- Exceptions *must* derive from BaseException.
759
760- Integer division always returns a float. The -Q option is no more.
761 All the following are gone:
762 * PyNumber_Divide and PyNumber_InPlaceDivide
763 * __div__, __rdiv__, and __idiv__
764 * nb_divide, nb_inplace_divide
765 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
766 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
767 if we want to re-use __div__ and friends. If we do, it will make
768 it harder to write code for both 2.x and 3.x.)
769
770- 'as' and 'with' are keywords.
771
772- Absolute import is the default behavior for 'import foo' etc.
773
Georg Brandl52b92cc2008-05-25 09:43:03 +0000774- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000775
Georg Brandl52b92cc2008-05-25 09:43:03 +0000776- Removed these Python builtins: apply(), callable(), coerce(),
777 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000778
Georg Brandl52b92cc2008-05-25 09:43:03 +0000779- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000780
Georg Brandl52b92cc2008-05-25 09:43:03 +0000781- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000782
783- Remove C API support for restricted execution.
784
Guido van Rossumcf1be882007-08-30 22:07:17 +0000785- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000786 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000787 sequences of unequal length -- it now stops after the shortest one
788 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000789
Georg Brandl52b92cc2008-05-25 09:43:03 +0000790- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000791
792- Added class decorators per PEP 3129.
793
794
795Extension Modules
796-----------------
797
Georg Brandl52b92cc2008-05-25 09:43:03 +0000798- Removed the imageop module. Obsolete long with its unit tests
799 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000800
Georg Brandl52b92cc2008-05-25 09:43:03 +0000801- Removed these attributes from the operator module: div, idiv,
802 __div__, __idiv__, isCallable, sequenceIncludes.
803
804- Removed these attributes from the sys module: exc_clear(), exc_type,
805 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000806
807
808Library
809-------
810
Georg Brandl52b92cc2008-05-25 09:43:03 +0000811- Removed the compiler package. Use of the _ast module and (an
812 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000813
Georg Brandl52b92cc2008-05-25 09:43:03 +0000814- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
815 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
816 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000817
Georg Brandl52b92cc2008-05-25 09:43:03 +0000818- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000819
Georg Brandl52b92cc2008-05-25 09:43:03 +0000820- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
821 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
822 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000823
Georg Brandl52b92cc2008-05-25 09:43:03 +0000824- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000825
Georg Brandl52b92cc2008-05-25 09:43:03 +0000826- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000827 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000828
Georg Brandl52b92cc2008-05-25 09:43:03 +0000829- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000830
Georg Brandl52b92cc2008-05-25 09:43:03 +0000831- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000832
833- Patch #1680961: atexit has been reimplemented in C.
834
Walter Dörwald41980ca2007-08-16 21:55:45 +0000835- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
836
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000837Build
838-----
839
840C API
841-----
842
Georg Brandl52b92cc2008-05-25 09:43:03 +0000843- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000844
Georg Brandl52b92cc2008-05-25 09:43:03 +0000845- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
846 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000847
Georg Brandl52b92cc2008-05-25 09:43:03 +0000848- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000849
Georg Brandl52b92cc2008-05-25 09:43:03 +0000850- Removed these macros: staticforward, statichere, PyArg_GetInt,
851 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000852
Georg Brandl52b92cc2008-05-25 09:43:03 +0000853- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
854 intintobjargproc, getreadbufferproc, getwritebufferproc,
855 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000856
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000857Tests
858-----
859
Brett Cannone7a30f72008-03-03 03:36:27 +0000860- Removed test.testall as test.regrtest replaces it.
861
Brett Cannonced04e02005-02-13 22:53:22 +0000862Documentation
863-------------
864
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000865Mac
866---
867
Georg Brandl52b92cc2008-05-25 09:43:03 +0000868- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +0000869
Guido van Rossum845702c2007-08-30 18:44:53 +0000870Platforms
871---------
872
873- Support for BeOS and AtheOS was removed (according to PEP 11).
874
875- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
876
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000877Tools/Demos
878-----------
879
Georg Brandl52b92cc2008-05-25 09:43:03 +0000880
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000881**(For information about older versions, consult the HISTORY file.)**