blob: 76ecbccf81f25b6dd55dc0c74811170e50137e32 [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
12Library
13-------
14
15- Issue #3394: zipfile.writestr sets external attributes when passed a
16 file name rather than a ZipInfo instance, so files are extracted with
17 mode 0600 rather than 000 under Unix.
18
19
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +000020What's new in Python 3.0b2?
21===========================
22
Barry Warsaw4bd1cef2008-07-18 02:28:44 +000023*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +000024
25Core and Builtins
26-----------------
27
Mark Dickinson65fe25e2008-07-16 11:30:51 +000028- Issue #3008: the float type has a new instance method 'float.hex'
29 and a new class method 'float.fromhex' to convert floating-point
30 numbers to and from hexadecimal strings, respectively.
31
Eric Smithd68af8f2008-07-16 00:15:35 +000032- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
33 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
34
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +000035- Issue #3280: like chr(), the "%c" format now accepts unicode code points
36 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
37 "narrow Unicode" builds, the result is a string of 2 code units, forming a
38 UTF-16 surrogate pair.
39
Georg Brandld52429f2008-07-04 15:55:02 +000040- Issue #3282: str.isprintable() should return False for undefined
41 Unicode characters.
42
Martin v. Löwis029656f2008-06-30 04:06:08 +000043- Issue #3236: Return small longs from PyLong_FromString.
44
Benjamin Petersone6528212008-07-15 15:32:09 +000045- Exception tracebacks now support exception chaining.
46
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +000047Library
48-------
49
Brett Cannonc2542e92008-07-25 18:19:20 +000050- Removed the sunaudio module. Use sunau instead.
51
Georg Brandl30704ea02008-07-23 15:07:12 +000052- Removed "ast" function aliases from the parser module.
53
Thomas Heller15383a02008-07-15 19:46:52 +000054- Issue #3313: Fixed a crash when a failed dlopen() call does not set
55 a valid dlerror() message.
56
Thomas Heller0261e1e2008-07-15 17:25:07 +000057- Issue #3258: Fixed a crash when a ctypes POINTER type to an
58 incomplete structure was created.
59
Georg Brandl1abcbf82008-07-01 19:28:43 +000060- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
61 argument now must be a bytes object in any case.
62
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +000063- Issue #3145: help("modules whatever") failed when trying to load the source
64 code of every single module of the standard library, including invalid files
65 used in the test suite.
66
Georg Brandlbded4d32008-07-17 18:15:35 +000067- The gettext library now consistently uses Unicode strings for message ids
68 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +000069
Benjamin Petersone6528212008-07-15 15:32:09 +000070- The traceback module has been expanded to handle chained exceptions.
71
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +000072C API
73-----
74
75- Issue #3247: the function Py_FindMethod was removed. Modern types should
76 use the tp_methods slot instead.
77
Benjamin Petersonde9c8692008-07-01 18:23:09 +000078Tools/Demos
79-----------
80
Georg Brandl336341f2008-07-01 20:21:28 +000081- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +000082
Georg Brandl336341f2008-07-01 20:21:28 +000083- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +000084
85
Brett Cannon0d71ee72008-05-08 18:13:40 +000086What's new in Python 3.0b1?
87===========================
88
Barry Warsawc1e689e2008-06-19 00:35:43 +000089*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +000090
91Core and Builtins
92-----------------
93
Brett Cannondb734912008-06-27 00:52:15 +000094- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
95 argument being anything other than a dict or None. Also fixed a bug in error
96 handling when 'message' and 'category' were both set to None, triggering a
97 bus error.
98
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +000099- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
100 holds the last (strong) reference to its referent.
101
Georg Brandl559e5d72008-06-11 18:37:52 +0000102- Issue #2630: implement PEP 3138. repr() now returns printable
103 Unicode characters unescaped, to get an ASCII-only representation
104 of an object use ascii().
105
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000106- Issue #1342: On windows, Python could not start when installed in a
107 directory with non-ascii characters.
108
Martin v. Löwis1a214512008-06-11 05:26:20 +0000109- Implement PEP 3121: new module initialization and finalization API.
110
Georg Brandle1b5ac62008-06-04 13:06:58 +0000111- Removed the already-defunct ``-t`` option.
112
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000113- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
114 unmarshalling many code objects, which happens when importing a
115 large .pyc file (~1000 functions).
116
Georg Brandl52b92cc2008-05-25 09:43:03 +0000117- Issue #2963: fix merging oversight that disabled method cache for
118 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000119
Georg Brandlc9b09532008-05-25 09:24:38 +0000120- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
121
Georg Brandl52b92cc2008-05-25 09:43:03 +0000122- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000123
Georg Brandl52b92cc2008-05-25 09:43:03 +0000124- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
125 code now allows any unicode string and returns a utf-8 encoded
126 buffer, just like the "s#" code already does. The "z" code was
127 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000128
Georg Brandl52b92cc2008-05-25 09:43:03 +0000129- Issue #2863: generators now have a ``gen.__name__`` attribute that
130 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
131 ``func.func_code.co_name``. The repr() of a generator now also
132 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000133
134- Issue #2831: enumerate() now has a ``start`` argument.
135
Georg Brandl52b92cc2008-05-25 09:43:03 +0000136- Issue #2801: fix bug in the float.is_integer method where a
137 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000138
Georg Brandl52b92cc2008-05-25 09:43:03 +0000139- The ``--with-toolbox-glue`` option (and the associated
140 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000141
Georg Brandl52b92cc2008-05-25 09:43:03 +0000142- Issue #2196: hasattr() now lets exceptions which do not inherit
143 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
144 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000145
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000146- #3021 Exception reraising sematics have been significantly improved. However,
147 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
148 code anymore.
149
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000150- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
151 removed.
152
Brett Cannon0d71ee72008-05-08 18:13:40 +0000153Extension Modules
154-----------------
155
Georg Brandl38feaf02008-05-25 07:45:51 +0000156- Renamed ``_winreg`` module to ``winreg``.
157
Georg Brandl52b92cc2008-05-25 09:43:03 +0000158- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
159 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000160
161- Support for Windows 9x has been removed from the winsound module.
162
Georg Brandl52b92cc2008-05-25 09:43:03 +0000163- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000164
Brett Cannon0d71ee72008-05-08 18:13:40 +0000165Library
166-------
167
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000168- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
169
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000170- a new ``urllib`` package was created. It consists of code from
171 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
172 modules have all been removed. The new package has five submodules:
173 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
174 ``urllib.error``, and ``urllib.robotparser``. The
175 ``urllib.request.urlopen()`` function uses the url opener from
176 ``urllib2``. (Note that the unittests have not been renamed for the
177 beta, but they will be renamed in the future.)
178
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000179- rfc822 has been removed in favor of the email package.
180
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000181- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000182
Barry Warsawf5019422008-06-12 02:42:00 +0000183- Patch #2849: Remove use of rfc822 module from standard library.
184
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000185- Added C optimized implementation of io.StringIO.
186
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000187- The ``pickle`` module is now automatically use an optimized C
188 implementation of Pickler and Unpickler when available. The
189 ``cPickle`` module is no longer needed.
190
Georg Brandl877b10a2008-06-01 21:25:55 +0000191- Removed the ``htmllib`` and ``sgmllib`` modules.
192
Georg Brandl61013952008-05-28 15:56:30 +0000193- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
194 been removed from ``http.cookies``.
195
Brett Cannona23810f2008-05-26 19:04:21 +0000196- The ``commands`` module has been removed. Its getoutput() and
197 getstatusoutput() functions have been moved to the ``subprocess`` module.
198
Georg Brandl3d5c4252008-05-26 18:03:26 +0000199- The ``http`` package was created; it contains the old ``httplib``
200 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
201 as ``http.cookiejar``, and the content of the three ``HTTPServer``
202 modules as ``http.server``.
203
Georg Brandl38eceaa2008-05-26 11:14:17 +0000204- The ``xmlrpc`` package was created; it contains the old
205 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
206 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000207 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000208
209- The ``dbm`` package was created, containing the old modules
210 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
211 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
212 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
213 as submodules.
214
Georg Brandl52b92cc2008-05-25 09:43:03 +0000215- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000216
Georg Brandl52b92cc2008-05-25 09:43:03 +0000217- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000218
Georg Brandl52b92cc2008-05-25 09:43:03 +0000219- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000220
Georg Brandl52b92cc2008-05-25 09:43:03 +0000221- Issue #2250: Exceptions raised during evaluation of names in
222 rlcompleter's ``Completer.complete()`` method are now caught and
223 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000224
Georg Brandl52b92cc2008-05-25 09:43:03 +0000225- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
226 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000227
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000228- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
229 large to fit in a C long. ldexp(x, n) now returns a zero (with
230 suitable sign) if n is large and negative; previously, it raised
231 OverflowError.
232
Georg Brandl52b92cc2008-05-25 09:43:03 +0000233- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000234
Georg Brandl52b92cc2008-05-25 09:43:03 +0000235- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000236
Georg Brandl52b92cc2008-05-25 09:43:03 +0000237- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000238
Georg Brandl52b92cc2008-05-25 09:43:03 +0000239- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000240
Georg Brandl52b92cc2008-05-25 09:43:03 +0000241- Fixed the ``__all__`` setting on ``collections`` to include
242 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000243
Brett Cannoncf3520c2008-05-11 22:47:58 +0000244- The sre module has been removed.
245
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000246- The Queue module has been renamed to queue.
247
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000248- The copy_reg module has been renamed to copyreg.
249
Brett Cannond8b61ee2008-05-11 03:00:26 +0000250- The mhlib module has been removed.
251
Brett Cannonbd474422008-05-10 22:42:14 +0000252- The ihooks module has been removed.
253
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000254- The fpformat module has been removed.
255
Brett Cannonf4fd9932008-05-10 21:11:46 +0000256- The dircache module has been removed.
257
Brett Cannond175b4c2008-05-10 03:19:54 +0000258- The Canvas module has been removed.
259
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000260- The Decimal module gained the magic methods __round__, __ceil__,
261 __floor__ and __trunc__, to give support for round, math.ceil,
262 math.floor and math.trunc.
263
Brett Cannon900ee3a2008-05-08 20:31:11 +0000264- The user module has been removed.
265
Brett Cannon34afe872008-05-08 20:31:44 +0000266- The mutex module has been removed.
267
Brett Cannon0d71ee72008-05-08 18:13:40 +0000268- The imputil module has been removed.
269
Georg Brandl52b92cc2008-05-25 09:43:03 +0000270- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000271
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000272- pdb gained the "until" command.
273
Georg Brandl52b92cc2008-05-25 09:43:03 +0000274- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000275
Georg Brandlf9926402008-06-13 06:32:25 +0000276- The threading module API was renamed to be PEP 8 complaint.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000277
Georg Brandl294d5a92008-06-01 19:25:32 +0000278Tools/Demos
279-----------
280
281- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000282
Brett Cannon0d71ee72008-05-08 18:13:40 +0000283Build
284-----
285
286
Barry Warsaw66079cd2008-04-04 01:36:36 +0000287What's New in Python 3.0a5?
288===========================
289
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000290*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000291
292Core and Builtins
293-----------------
294
Georg Brandl52b92cc2008-05-25 09:43:03 +0000295- Fixed misbehaviour of PyLong_FromSsize_t on systems where
296 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000297
Georg Brandl52b92cc2008-05-25 09:43:03 +0000298- Issue #2221: Corrected a SystemError "error return without exception
299 set", when the code executed by exec() raises an exception, and
300 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000301
Georg Brandl52b92cc2008-05-25 09:43:03 +0000302- Bug #2565: The repr() of type objects now calls them 'class', not
303 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000304
Martin v. Löwis790465f2008-04-05 20:41:37 +0000305- The command line processing was converted to pass Unicode strings
306 through as unmodified as possible; as a consequence, the C API
307 related to command line arguments was changed to use wchar_t.
308
Georg Brandl52b92cc2008-05-25 09:43:03 +0000309- All backslashes in raw strings are interpreted literally. This
310 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000311
Barry Warsaw66079cd2008-04-04 01:36:36 +0000312Extension Modules
313-----------------
314
315Library
316-------
317
Georg Brandl52b92cc2008-05-25 09:43:03 +0000318- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000319
Thomas Hellere106dc32008-04-24 18:39:36 +0000320- Issue #2682: ctypes callback functions now longer contain a cyclic
321 reference to themselves.
322
Georg Brandl52b92cc2008-05-25 09:43:03 +0000323- Issue #2058: Remove the buf attribute and add __slots__ to the
324 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000325
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000326- Bug #2606: Avoid calling .sort() on a dict_keys object.
327
Thomas Hellerbff533b2008-04-04 19:53:14 +0000328- The bundled libffi copy is now in sync with the recently released
329 libffi3.0.5 version, apart from some small changes to
330 Modules/_ctypes/libffi/configure.ac.
331
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000332Build
333-----
334
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000335- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
336
Guido van Rossumdc21db32008-04-07 18:37:41 +0000337- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000338 accidentally overwriting a Python 2.x installation. Use "make
339 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000340
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000341- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
342 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000343
Georg Brandl52b92cc2008-05-25 09:43:03 +0000344
Barry Warsawa9d499d2008-03-01 18:38:07 +0000345What's New in Python 3.0a4?
346===========================
347
Barry Warsawbb5cd082008-04-02 23:33:27 +0000348*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000349
Martin v. Löwis25931462008-03-17 20:43:42 +0000350Core and Builtins
351-----------------
352
353- Bug #2301: Don't try decoding the source code into the original
354 encoding for syntax errors.
355
Martin v. Löwis92fab752008-03-08 10:40:41 +0000356Extension Modules
357-----------------
358
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000359- The dl module was removed, use the ctypes module instead.
360
Martin v. Löwis92fab752008-03-08 10:40:41 +0000361- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000362
Martin v. Löwis071ef772008-03-08 11:24:24 +0000363Library
364-------
365
Georg Brandl52b92cc2008-05-25 09:43:03 +0000366- The class distutils.commands.build_py.build_py_2to3 can be used as a
367 build_py replacement to automatically run 2to3 on modules that are
368 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000369
Guido van Rossumf4169812008-03-17 22:56:06 +0000370- A new pickle protocol (protocol 3) is added with explicit support
371 for bytes. This is the default protocol. It intentionally cannot
372 be unpickled by Python 2.x.
373
374- When a pickle written by Python 2.x contains an (8-bit) str
375 instance, this is now decoded to a (Unicode) str instance. The
376 encoding used to do this defaults to ASCII, but can be overridden
377 via two new keyword arguments to the Unpickler class. Previously
378 this would create bytes instances, which is usually wrong: str
379 instances are often used to pickle attribute names etc., and text is
380 more common than binary data anyway.
381
Martin v. Löwis071ef772008-03-08 11:24:24 +0000382- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000383 system doesn't support CODESET and LANG isn't set or doesn't allow
384 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000385
Georg Brandl52b92cc2008-05-25 09:43:03 +0000386- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
387 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000388
Georg Brandl52b92cc2008-05-25 09:43:03 +0000389- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
390 has been renamed tokenize and now works with bytes rather than
391 strings. A new detect_encoding function has been added for
392 determining source file encoding according to PEP-0263. Token
393 sequences returned by tokenize always start with an ENCODING token
394 which specifies the encoding used to decode the file. This token is
395 used to encode the output of untokenize back to bytes.
396
Barry Warsawa9d499d2008-03-01 18:38:07 +0000397
Christian Heimesbc873412007-12-08 22:11:32 +0000398What's New in Python 3.0a3?
399===========================
400
Barry Warsaw659fc422008-03-01 17:45:23 +0000401*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000402
403Core and Builtins
404-----------------
405
Georg Brandl52b92cc2008-05-25 09:43:03 +0000406- Issue #2282: io.TextIOWrapper was not overriding seekable() from
407 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000408
Georg Brandl52b92cc2008-05-25 09:43:03 +0000409- Issue #2115: Important speedup in setting __slot__ attributes. Also
410 prevent a possible crash: an Abstract Base Class would try to access
411 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000412
Georg Brandl52b92cc2008-05-25 09:43:03 +0000413- Fixed repr() and str() of complex numbers with infinity or nan as
414 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000415
Georg Brandl52b92cc2008-05-25 09:43:03 +0000416- Clear all free list during a gc.collect() of the highest generation
417 in order to allow pymalloc to free more arenas. Python may give back
418 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000419
Georg Brandl52b92cc2008-05-25 09:43:03 +0000420- Issue #2045: Fix an infinite recursion triggered when printing a
421 subclass of collections.defaultdict, if its default_factory is set
422 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000423
424- Fixed a minor memory leak in dictobject.c. The content of the free
425 list was not freed on interpreter shutdown.
426
Georg Brandl52b92cc2008-05-25 09:43:03 +0000427- Limit free list of method and builtin function objects to 256
428 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000429
Georg Brandl52b92cc2008-05-25 09:43:03 +0000430- Patch #1953: Added ``sys._compact_freelists()`` and the C API
431 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000432 to compact the internal free lists of pre-allocted ints and floats.
433
434- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000435 Python expected the return type int but the fork familie returns
436 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000437
Georg Brandl52b92cc2008-05-25 09:43:03 +0000438- Issue #1678380: Fix a bug that identifies 0j and -0j when they
439 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000440
Georg Brandl52b92cc2008-05-25 09:43:03 +0000441- Issue #2025: Added tuple.count() and tuple.index() methods to comply
442 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000443
Georg Brandl52b92cc2008-05-25 09:43:03 +0000444- Fixed multiple reinitialization of the Python interpreter. The small
445 int list in longobject.c has caused a seg fault during the third
446 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000447
Georg Brandl52b92cc2008-05-25 09:43:03 +0000448- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000449
Georg Brandl52b92cc2008-05-25 09:43:03 +0000450- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000451
Georg Brandl52b92cc2008-05-25 09:43:03 +0000452- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000453
Georg Brandl52b92cc2008-05-25 09:43:03 +0000454- map() no longer accepts None for the first argument. Use zip()
455 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000456
Facundo Batista2336bdd2008-01-19 19:12:01 +0000457- Issue #1769: Now int("- 1") is not allowed any more.
458
Georg Brandl52b92cc2008-05-25 09:43:03 +0000459- Object/longobject.c: long(float('nan')) raises an OverflowError
460 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000461
Georg Brandl52b92cc2008-05-25 09:43:03 +0000462- Issue #1762972: __file__ points to the source file instead of the
463 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000464
Guido van Rossumab078dd2008-01-06 00:09:11 +0000465- Issue #1393: object_richcompare() returns NotImplemented instead of
466 False if the objects aren't equal, to give the other side a chance.
467
Guido van Rossume239b002008-01-06 00:44:20 +0000468- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000469
Georg Brandl52b92cc2008-05-25 09:43:03 +0000470- Improve some exception messages when Windows fails to load an
471 extension module. Now we get for example '%1 is not a valid Win32
472 application' instead of 'error code 193'. Also use Unicode strings
473 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000474
Georg Brandl52b92cc2008-05-25 09:43:03 +0000475- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
476 Python C API has gained a new type *PyInstanceMethod_Type* and the
477 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
478 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000479
Georg Brandl52b92cc2008-05-25 09:43:03 +0000480- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
481 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
482 are now enough to print the corresponding list of objects considered
483 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000484
Georg Brandl52b92cc2008-05-25 09:43:03 +0000485- Issue #1573: Improper use of the keyword-only syntax makes the
486 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000487
Georg Brandl52b92cc2008-05-25 09:43:03 +0000488- Issue #1564: The set implementation should special-case PyUnicode
489 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000490
Guido van Rossumea6775b2008-02-21 20:16:31 +0000491- Patch #1031213: Decode source line in SyntaxErrors back to its
492 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000493
Christian Heimes09aaa882008-02-23 15:01:06 +0000494- inspect.getsource() includes the decorators again.
495
Guido van Rossumea6775b2008-02-21 20:16:31 +0000496- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
497 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000498
Georg Brandl52b92cc2008-05-25 09:43:03 +0000499- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
500 the first chunk fed to the decoder started with a BOM, but was
501 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000502
Christian Heimesbc873412007-12-08 22:11:32 +0000503Extension Modules
504-----------------
505
Georg Brandl52b92cc2008-05-25 09:43:03 +0000506- Code for itertools ifilter(), imap(), and izip() moved to bultins
507 and renamed to filter(), map(), and zip(). Also, renamed
508 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000509
Georg Brandl52b92cc2008-05-25 09:43:03 +0000510- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000511
Georg Brandl52b92cc2008-05-25 09:43:03 +0000512- Bug #2111: mmap segfaults when trying to write a block opened with
513 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000514
Georg Brandl52b92cc2008-05-25 09:43:03 +0000515- Issue #2063: correct order of utime and stime in os.times() result
516 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000517
Christian Heimesbc873412007-12-08 22:11:32 +0000518Library
519-------
520
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000521- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000522
Georg Brandl52b92cc2008-05-25 09:43:03 +0000523- Created new UserDict class in collections module. This one inherits
524 from and complies with the MutableMapping ABC. Also, moved
525 UserString and UserList to the collections module. The
526 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000527
Guido van Rossumea6775b2008-02-21 20:16:31 +0000528- Removed UserDict.DictMixin. Replaced all its uses with
529 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000530
Guido van Rossume239b002008-01-06 00:44:20 +0000531- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000532
Guido van Rossume239b002008-01-06 00:44:20 +0000533- Issue #1585: IDLE uses non-existent xrange() function.
534
535- Issue #1578: Problems in win_getpass.
536
Georg Brandl52d168a2008-01-07 18:10:24 +0000537Build
538-----
539
Georg Brandl52b92cc2008-05-25 09:43:03 +0000540- Renamed --enable-unicode configure flag to --with-wide-unicode,
541 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000542
Guido van Rossume239b002008-01-06 00:44:20 +0000543C API
544-----
545
546- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
547 Py_TYPE and Py_REFCNT.
548
Georg Brandl52b92cc2008-05-25 09:43:03 +0000549- New API PyImport_ImportModuleNoBlock(), works like
550 PyImport_ImportModule() but won't block on the import lock
551 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000552
Christian Heimesbc873412007-12-08 22:11:32 +0000553
Fred Drake0e474a82007-10-11 18:01:43 +0000554What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000555===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000556
Guido van Rossum99533a92007-12-06 05:07:41 +0000557*Release date: 07-Dec-2007*
558
559(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000560
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000561Core and Builtins
562-----------------
563
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000564- str8 now has the same construction signature as bytes.
565
Georg Brandl52b92cc2008-05-25 09:43:03 +0000566- Comparisons between str and str8 now return False/True for ==/!=.
567 sqlite3 returns str8 when recreating on object from it's __conform__
568 value. The struct module returns str8 for all string-related
569 formats. This was true before this change, but becomes more
570 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000571
Georg Brandl52b92cc2008-05-25 09:43:03 +0000572- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
573 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000574
575- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
576
577- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000578 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000579 `PyUnicode_DecodeFSDefault(char*)` was added.
580
Georg Brandl52b92cc2008-05-25 09:43:03 +0000581- io.open() and _fileio.FileIO have grown a new argument closefd. A
582 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000583
Georg Brandl52b92cc2008-05-25 09:43:03 +0000584- Added a new option -b to issues warnings (-bb for errors) about
585 certain operations between bytes/buffer and str like str(b'') and
586 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000587
Georg Brandl52b92cc2008-05-25 09:43:03 +0000588- The standards streams sys.stdin, stdout and stderr may be None when
589 the when the C runtime library returns an invalid file descriptor
590 for the streams (fileno(stdin) < 0). For now this happens only for
591 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000592
Christian Heimesbce52be2007-11-17 19:08:41 +0000593- Added PCbuild9 directory for VS 2008.
594
Georg Brandl52b92cc2008-05-25 09:43:03 +0000595- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
596 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000597
Georg Brandl52b92cc2008-05-25 09:43:03 +0000598- Unbound methods are gone for good. ClassObject.method returns an
599 ordinary function object, instance.method still returns a bound
600 method object. The API of bound methods is cleaned up, too. The
601 im_class attribute is removed and im_func + im_self are renamed to
602 __func__ and __self__. The factory PyMethod_New takes only func and
603 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000604
Georg Brandl52b92cc2008-05-25 09:43:03 +0000605- intobject.h is no longer included by Python.h. The remains were
606 moved to longobject.h. It still exists to define several aliases
607 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000608
Christian Heimesa37d4c62007-12-04 23:02:19 +0000609- Removed sys.maxint, use sys.maxsize instead.
610
Fred Drake0e474a82007-10-11 18:01:43 +0000611Extension Modules
612-----------------
613
614- The `hotshot` profiler has been removed; use `cProfile` instead.
615
Brett Cannone9fd2312007-10-12 19:18:19 +0000616Library
617-------
618
Georg Brandl52b92cc2008-05-25 09:43:03 +0000619- When loading an external file using testfile(), the passed-in
620 encoding argument was being ignored if __loader__ is defined and
621 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000622
Georg Brandl52b92cc2008-05-25 09:43:03 +0000623- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
624 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000625
Christian Heimesc9543e42007-11-28 08:28:28 +0000626- Removed the 'new' module.
627
Georg Brandl52b92cc2008-05-25 09:43:03 +0000628- Removed all types from the 'types' module that are easily accessable
629 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000630
Georg Brandl52d168a2008-01-07 18:10:24 +0000631
Guido van Rossum4405cf32007-08-30 17:16:55 +0000632What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000633==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000634
Guido van Rossum4405cf32007-08-30 17:16:55 +0000635*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000636
637Core and Builtins
638-----------------
639
Martin v. Löwis47383402007-08-15 07:32:56 +0000640- PEP 3131: Support non-ASCII identifiers.
641
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000642- PEP 3120: Change default encoding to UTF-8.
643
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000644- PEP 3123: Use proper C inheritance for PyObject.
645
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000646- Removed the __oct__ and __hex__ special methods and added a bin()
647 builtin function.
648
Georg Brandl52b92cc2008-05-25 09:43:03 +0000649- PEP 3127: octal literals now start with "0o". Old-style octal
650 literals are invalid. There are binary literals with a prefix of
651 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000652
Guido van Rossume7ba4952007-06-06 23:52:48 +0000653- None, True, False are now keywords.
654
Guido van Rossum29478ef2007-05-29 00:39:44 +0000655- PEP 3119: isinstance() and issubclass() can be overridden.
656
Guido van Rossumebe3e162007-05-17 18:20:34 +0000657- Remove BaseException.message.
658
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000659- Remove tuple parameter unpacking (PEP 3113).
660
Georg Brandl52b92cc2008-05-25 09:43:03 +0000661- Remove the f_restricted attribute from frames. This naturally leads
662 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000663
Georg Brandl52b92cc2008-05-25 09:43:03 +0000664- PEP 3132 was accepted. That means that you can do ``a, *b =
665 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000666
Georg Brandl52b92cc2008-05-25 09:43:03 +0000667- range() now returns an iterator rather than a list. Floats are not
668 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000669
Nick Coghlan650f0d02007-04-15 12:05:43 +0000670- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000671 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000672
Guido van Rossume27dc722007-03-27 22:37:34 +0000673- By default, != returns the opposite of ==, unless the latter returns
674 NotImplemented.
675
Georg Brandl52b92cc2008-05-25 09:43:03 +0000676- Patch #1680961: sys.exitfunc has been removed and replaced with a
677 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000678
Georg Brandl801dd732007-03-18 20:18:31 +0000679- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000680 keyword arg in the class statement, which can now use the full
681 syntax of a parameter list. Also, the metaclass can implement a
682 __prepare__ function which will be called to create the dictionary
683 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000684
Georg Brandl428f0642007-03-18 18:35:15 +0000685- The long-deprecated argument "pend" of PyFloat_FromString() has been
686 removed.
687
Georg Brandle32b4222007-03-10 22:13:27 +0000688- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000689 its argument, if it exists. If not, it will work like before. This
690 allows customizing the output of dir() in the presence of a
691 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000692
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000693- Removed support for __members__ and __methods__.
694
Georg Brandle32b4222007-03-10 22:13:27 +0000695- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000696
Georg Brandle32b4222007-03-10 22:13:27 +0000697- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000698 functionality formerly known as raw_input(); the name raw_input() is
699 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000700
Georg Brandl52b92cc2008-05-25 09:43:03 +0000701- Classes listed in an 'except' clause must inherit from
702 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000703
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000704- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000705 and .keys(), .items(), .values() return dict views, which behave
706 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000707
Guido van Rossum8b545362007-02-09 23:52:14 +0000708- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000709 'softspace' attribute of files is now gone (since print() doesn't
710 use it). A side effect of this change is that you can get
711 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000712
713 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000714 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000715
716 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000717
Brett Cannon398db8b2007-01-29 23:44:37 +0000718- PEP 3102: keyword-only arguments.
719
Georg Brandl52b92cc2008-05-25 09:43:03 +0000720- Int/Long unification is complete. The 'long' built-in type and
721 literals with trailing 'L' or 'l' have been removed. Performance
722 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000723
724- 'except E, V' must now be spelled as 'except E as V' and deletes V
725 at the end of the except clause; V must be a simple name.
726
Neal Norwitzc1505362006-12-28 06:47:50 +0000727- Added function annotations per PEP 3107.
728
Georg Brandl52b92cc2008-05-25 09:43:03 +0000729- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000730
731 >>> def f(x):
732 ... def inc():
733 ... nonlocal x
734 ... x += 1
735 ... return x
736 ... return inc
737 ...
738 >>> inc = f(0)
739 >>> inc()
740 1
741 >>> inc()
742 2
743
Georg Brandl66a796e2006-12-19 20:50:34 +0000744- Moved intern() to sys.intern().
745
746- exec is now a function.
747
748- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000749
Neal Norwitz4886cc32006-08-21 17:06:07 +0000750- Classic classes are a thing of the past. All classes are new style.
751
752- Exceptions *must* derive from BaseException.
753
754- Integer division always returns a float. The -Q option is no more.
755 All the following are gone:
756 * PyNumber_Divide and PyNumber_InPlaceDivide
757 * __div__, __rdiv__, and __idiv__
758 * nb_divide, nb_inplace_divide
759 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
760 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
761 if we want to re-use __div__ and friends. If we do, it will make
762 it harder to write code for both 2.x and 3.x.)
763
764- 'as' and 'with' are keywords.
765
766- Absolute import is the default behavior for 'import foo' etc.
767
Georg Brandl52b92cc2008-05-25 09:43:03 +0000768- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000769
Georg Brandl52b92cc2008-05-25 09:43:03 +0000770- Removed these Python builtins: apply(), callable(), coerce(),
771 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000772
Georg Brandl52b92cc2008-05-25 09:43:03 +0000773- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000774
Georg Brandl52b92cc2008-05-25 09:43:03 +0000775- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000776
777- Remove C API support for restricted execution.
778
Guido van Rossumcf1be882007-08-30 22:07:17 +0000779- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000780 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000781 sequences of unequal length -- it now stops after the shortest one
782 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000783
Georg Brandl52b92cc2008-05-25 09:43:03 +0000784- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000785
786- Added class decorators per PEP 3129.
787
788
789Extension Modules
790-----------------
791
Georg Brandl52b92cc2008-05-25 09:43:03 +0000792- Removed the imageop module. Obsolete long with its unit tests
793 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000794
Georg Brandl52b92cc2008-05-25 09:43:03 +0000795- Removed these attributes from the operator module: div, idiv,
796 __div__, __idiv__, isCallable, sequenceIncludes.
797
798- Removed these attributes from the sys module: exc_clear(), exc_type,
799 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000800
801
802Library
803-------
804
Georg Brandl52b92cc2008-05-25 09:43:03 +0000805- Removed the compiler package. Use of the _ast module and (an
806 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000807
Georg Brandl52b92cc2008-05-25 09:43:03 +0000808- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
809 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
810 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000811
Georg Brandl52b92cc2008-05-25 09:43:03 +0000812- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000813
Georg Brandl52b92cc2008-05-25 09:43:03 +0000814- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
815 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
816 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000817
Georg Brandl52b92cc2008-05-25 09:43:03 +0000818- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000819
Georg Brandl52b92cc2008-05-25 09:43:03 +0000820- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000821 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000822
Georg Brandl52b92cc2008-05-25 09:43:03 +0000823- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000824
Georg Brandl52b92cc2008-05-25 09:43:03 +0000825- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000826
827- Patch #1680961: atexit has been reimplemented in C.
828
Walter Dörwald41980ca2007-08-16 21:55:45 +0000829- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
830
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000831Build
832-----
833
834C API
835-----
836
Georg Brandl52b92cc2008-05-25 09:43:03 +0000837- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000838
Georg Brandl52b92cc2008-05-25 09:43:03 +0000839- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
840 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000841
Georg Brandl52b92cc2008-05-25 09:43:03 +0000842- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000843
Georg Brandl52b92cc2008-05-25 09:43:03 +0000844- Removed these macros: staticforward, statichere, PyArg_GetInt,
845 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000846
Georg Brandl52b92cc2008-05-25 09:43:03 +0000847- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
848 intintobjargproc, getreadbufferproc, getwritebufferproc,
849 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000850
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000851Tests
852-----
853
Brett Cannone7a30f72008-03-03 03:36:27 +0000854- Removed test.testall as test.regrtest replaces it.
855
Brett Cannonced04e02005-02-13 22:53:22 +0000856Documentation
857-------------
858
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000859Mac
860---
861
Georg Brandl52b92cc2008-05-25 09:43:03 +0000862- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +0000863
Guido van Rossum845702c2007-08-30 18:44:53 +0000864Platforms
865---------
866
867- Support for BeOS and AtheOS was removed (according to PEP 11).
868
869- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
870
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000871Tools/Demos
872-----------
873
Georg Brandl52b92cc2008-05-25 09:43:03 +0000874
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000875**(For information about older versions, consult the HISTORY file.)**