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Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001+++++++++++
2Python News
3+++++++++++
4
Anthony Baxterb0c66302004-11-04 05:23:17 +00005(editors: check NEWS.help for information about editing NEWS using ReST.)
6
Barry Warsaw8509df72008-08-21 03:02:47 +00007What's New in Python 3.0 release candidate 1
8============================================
9
10*Release date: XX-XXXX-2008*
11
12Core and Builtins
13-----------------
14
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000015- Issue #3650: Fixed a reference leak in bytes.split('x').
16
Barry Warsaw8509df72008-08-21 03:02:47 +000017Library
18-------
19
20
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000021What's new in Python 3.0b3?
22===========================
23
Barry Warsaw57c10582008-08-21 02:39:51 +000024*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000025
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000026Core and Builtins
27-----------------
28
Antoine Pitrou616d2852008-08-19 22:09:34 +000029- Issue #2394: implement more of the memoryview API, with the caveat that
30 only one-dimensional contiguous buffers are supported and exercised right
31 now. Slicing, slice assignment and comparison (equality and inequality)
32 have been added. Also, the tolist() method has been implemented, but only
33 for byte buffers. Endly, the API has been updated to return bytes objects
34 wherever it used to return bytearrays.
35
Antoine Pitrouee58fa42008-08-19 18:22:14 +000036- Issue #3560: clean up the new C PyMemoryView API so that naming is
37 internally consistent; add macros PyMemoryView_GET_BASE() and
38 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
39 without relying on a particular implementation; remove the ill-named
40 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
41
Thomas Hellerf5049fc2008-08-19 19:49:49 +000042- ctypes function pointers that are COM methods have a boolean True
43 value again.
44
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000045- Issue #1819: function calls with several named parameters are now on
46 average 35% faster (as measured by pybench).
47
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +000048- The undocumented C APIs PyUnicode_AsString() and
49 PyUnicode_AsStringAndSize() were made private to the interpreter, in
50 order to be able to refine their interfaces for Python 3.1.
51
52 If you need to access the UTF-8 representation of a Unicode object
53 as bytes string, please use PyUnicode_AsUTF8String() instead.
54
Antoine Pitrouaf14b792008-08-07 21:50:41 +000055- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
56 to Python 3.0's stricter semantics which allow to avoid successive
57 reallocations of the result string (this also affects str.join()).
58
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +000059
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000060Library
61-------
62
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +000063- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
64 "global name 'header' is not defined".
65
Antoine Pitroufd036452008-08-19 17:56:33 +000066- Issue #2834: update the regular expression library to match the unicode
67 standards of py3k. In other words, mixing bytes and unicode strings
68 (be it as pattern, search string or replacement string) raises a TypeError.
69 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
70 and can be disabled by specifying a new re.ASCII flag; as for bytes
71 patterns, ASCII matching is the only option and trying to specify re.UNICODE
72 for such patterns raises a ValueError.
73
Guido van Rossum52dbbb92008-08-18 21:44:30 +000074- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
75 Code contributed by Matt Giuca. quote() now encodes the input
76 before quoting, unquote() decodes after unquoting. There are
77 new arguments to change the encoding and errors settings.
78 There are also new APIs to skip the encode/decode steps.
79 [un]quote_plus() are also affected.
80
Nick Coghlan36f49522008-08-18 12:31:52 +000081- Issue #2235: numbers.Number now blocks inheritance of the default id()
82 based hash because that hash mechanism is not correct for numeric types.
83 All concrete numeric types that inherit from Number (rather than just
84 registering with it) must explicitly provide a hash implementation in
85 order for their instances to be hashable.
86
Benjamin Peterson4cd6a952008-08-17 20:23:46 +000087- Issue #2676: in the email package, content-type parsing was hanging on
88 pathological input because of quadratic or exponential behaviour of a
89 regular expression.
90
Antoine Pitrou87695762008-08-14 22:44:29 +000091- Issue #3476: binary buffered reading through the new "io" library is now
92 thread-safe.
93
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +000094- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
95 menu entries were not deleted.
96
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +000097- Remove the TarFileCompat class from tarfile.py.
98
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +000099- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
100 accepts the same parameters. It just checks that its first argument is an
101 integer.
102
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000103- Issue #3394: zipfile.writestr sets external attributes when passed a
104 file name rather than a ZipInfo instance, so files are extracted with
105 mode 0600 rather than 000 under Unix.
106
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000107- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
108 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000109
Martin v. Löwis371bb502008-08-16 13:02:57 +0000110Extension Modules
111-----------------
112
113- Bug #3542: Support Unicode strings in _msi module.
114
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000115What's new in Python 3.0b2?
116===========================
117
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000118*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000119
120Core and Builtins
121-----------------
122
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000123- Issue #3008: the float type has a new instance method 'float.hex'
124 and a new class method 'float.fromhex' to convert floating-point
125 numbers to and from hexadecimal strings, respectively.
126
Eric Smithd68af8f2008-07-16 00:15:35 +0000127- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
128 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
129
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000130- Issue #3280: like chr(), the "%c" format now accepts unicode code points
131 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
132 "narrow Unicode" builds, the result is a string of 2 code units, forming a
133 UTF-16 surrogate pair.
134
Georg Brandld52429f2008-07-04 15:55:02 +0000135- Issue #3282: str.isprintable() should return False for undefined
136 Unicode characters.
137
Martin v. Löwis029656f2008-06-30 04:06:08 +0000138- Issue #3236: Return small longs from PyLong_FromString.
139
Benjamin Petersone6528212008-07-15 15:32:09 +0000140- Exception tracebacks now support exception chaining.
141
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000142Library
143-------
144
Brett Cannonc2542e92008-07-25 18:19:20 +0000145- Removed the sunaudio module. Use sunau instead.
146
Thomas Heller47bc8092008-08-19 06:38:12 +0000147- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
148 api functions without holding the GIL, which could lead to a fatal
149 error when they failed.
150
151- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
152
Georg Brandl30704ea02008-07-23 15:07:12 +0000153- Removed "ast" function aliases from the parser module.
154
Thomas Heller15383a02008-07-15 19:46:52 +0000155- Issue #3313: Fixed a crash when a failed dlopen() call does not set
156 a valid dlerror() message.
157
Thomas Heller0261e1e2008-07-15 17:25:07 +0000158- Issue #3258: Fixed a crash when a ctypes POINTER type to an
159 incomplete structure was created.
160
Georg Brandl1abcbf82008-07-01 19:28:43 +0000161- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
162 argument now must be a bytes object in any case.
163
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000164- Issue #3145: help("modules whatever") failed when trying to load the source
165 code of every single module of the standard library, including invalid files
166 used in the test suite.
167
Georg Brandlbded4d32008-07-17 18:15:35 +0000168- The gettext library now consistently uses Unicode strings for message ids
169 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000170
Benjamin Petersone6528212008-07-15 15:32:09 +0000171- The traceback module has been expanded to handle chained exceptions.
172
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000173C API
174-----
175
176- Issue #3247: the function Py_FindMethod was removed. Modern types should
177 use the tp_methods slot instead.
178
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000179Tools/Demos
180-----------
181
Georg Brandl336341f2008-07-01 20:21:28 +0000182- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000183
Georg Brandl336341f2008-07-01 20:21:28 +0000184- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000185
186
Brett Cannon0d71ee72008-05-08 18:13:40 +0000187What's new in Python 3.0b1?
188===========================
189
Barry Warsawc1e689e2008-06-19 00:35:43 +0000190*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000191
192Core and Builtins
193-----------------
194
Brett Cannondb734912008-06-27 00:52:15 +0000195- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
196 argument being anything other than a dict or None. Also fixed a bug in error
197 handling when 'message' and 'category' were both set to None, triggering a
198 bus error.
199
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000200- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
201 holds the last (strong) reference to its referent.
202
Georg Brandl559e5d72008-06-11 18:37:52 +0000203- Issue #2630: implement PEP 3138. repr() now returns printable
204 Unicode characters unescaped, to get an ASCII-only representation
205 of an object use ascii().
206
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000207- Issue #1342: On windows, Python could not start when installed in a
208 directory with non-ascii characters.
209
Martin v. Löwis1a214512008-06-11 05:26:20 +0000210- Implement PEP 3121: new module initialization and finalization API.
211
Georg Brandle1b5ac62008-06-04 13:06:58 +0000212- Removed the already-defunct ``-t`` option.
213
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000214- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
215 unmarshalling many code objects, which happens when importing a
216 large .pyc file (~1000 functions).
217
Georg Brandl52b92cc2008-05-25 09:43:03 +0000218- Issue #2963: fix merging oversight that disabled method cache for
219 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000220
Georg Brandlc9b09532008-05-25 09:24:38 +0000221- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
222
Georg Brandl52b92cc2008-05-25 09:43:03 +0000223- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000224
Georg Brandl52b92cc2008-05-25 09:43:03 +0000225- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
226 code now allows any unicode string and returns a utf-8 encoded
227 buffer, just like the "s#" code already does. The "z" code was
228 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000229
Georg Brandl52b92cc2008-05-25 09:43:03 +0000230- Issue #2863: generators now have a ``gen.__name__`` attribute that
231 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
232 ``func.func_code.co_name``. The repr() of a generator now also
233 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000234
235- Issue #2831: enumerate() now has a ``start`` argument.
236
Georg Brandl52b92cc2008-05-25 09:43:03 +0000237- Issue #2801: fix bug in the float.is_integer method where a
238 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000239
Georg Brandl52b92cc2008-05-25 09:43:03 +0000240- The ``--with-toolbox-glue`` option (and the associated
241 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000242
Georg Brandl52b92cc2008-05-25 09:43:03 +0000243- Issue #2196: hasattr() now lets exceptions which do not inherit
244 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
245 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000246
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000247- #3021 Exception reraising sematics have been significantly improved. However,
248 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
249 code anymore.
250
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000251- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
252 removed.
253
Brett Cannon0d71ee72008-05-08 18:13:40 +0000254Extension Modules
255-----------------
256
Georg Brandl38feaf02008-05-25 07:45:51 +0000257- Renamed ``_winreg`` module to ``winreg``.
258
Georg Brandl52b92cc2008-05-25 09:43:03 +0000259- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
260 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000261
262- Support for Windows 9x has been removed from the winsound module.
263
Georg Brandl52b92cc2008-05-25 09:43:03 +0000264- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000265
Brett Cannon0d71ee72008-05-08 18:13:40 +0000266Library
267-------
268
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000269- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
270 symtable.Symbol have been removed.
271
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000272- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
273
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000274- a new ``urllib`` package was created. It consists of code from
275 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
276 modules have all been removed. The new package has five submodules:
277 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
278 ``urllib.error``, and ``urllib.robotparser``. The
279 ``urllib.request.urlopen()`` function uses the url opener from
280 ``urllib2``. (Note that the unittests have not been renamed for the
281 beta, but they will be renamed in the future.)
282
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000283- rfc822 has been removed in favor of the email package.
284
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000285- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000286
Barry Warsawf5019422008-06-12 02:42:00 +0000287- Patch #2849: Remove use of rfc822 module from standard library.
288
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000289- Added C optimized implementation of io.StringIO.
290
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000291- The ``pickle`` module is now automatically use an optimized C
292 implementation of Pickler and Unpickler when available. The
293 ``cPickle`` module is no longer needed.
294
Georg Brandl877b10a2008-06-01 21:25:55 +0000295- Removed the ``htmllib`` and ``sgmllib`` modules.
296
Georg Brandl61013952008-05-28 15:56:30 +0000297- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
298 been removed from ``http.cookies``.
299
Brett Cannona23810f2008-05-26 19:04:21 +0000300- The ``commands`` module has been removed. Its getoutput() and
301 getstatusoutput() functions have been moved to the ``subprocess`` module.
302
Georg Brandl3d5c4252008-05-26 18:03:26 +0000303- The ``http`` package was created; it contains the old ``httplib``
304 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
305 as ``http.cookiejar``, and the content of the three ``HTTPServer``
306 modules as ``http.server``.
307
Georg Brandl38eceaa2008-05-26 11:14:17 +0000308- The ``xmlrpc`` package was created; it contains the old
309 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
310 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000311 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000312
313- The ``dbm`` package was created, containing the old modules
314 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
315 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
316 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
317 as submodules.
318
Georg Brandl52b92cc2008-05-25 09:43:03 +0000319- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000320
Georg Brandl52b92cc2008-05-25 09:43:03 +0000321- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000322
Georg Brandl52b92cc2008-05-25 09:43:03 +0000323- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000324
Georg Brandl52b92cc2008-05-25 09:43:03 +0000325- Issue #2250: Exceptions raised during evaluation of names in
326 rlcompleter's ``Completer.complete()`` method are now caught and
327 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000328
Georg Brandl52b92cc2008-05-25 09:43:03 +0000329- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
330 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000331
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000332- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
333 large to fit in a C long. ldexp(x, n) now returns a zero (with
334 suitable sign) if n is large and negative; previously, it raised
335 OverflowError.
336
Georg Brandl52b92cc2008-05-25 09:43:03 +0000337- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000338
Georg Brandl52b92cc2008-05-25 09:43:03 +0000339- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000340
Georg Brandl52b92cc2008-05-25 09:43:03 +0000341- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000342
Georg Brandl52b92cc2008-05-25 09:43:03 +0000343- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000344
Georg Brandl52b92cc2008-05-25 09:43:03 +0000345- Fixed the ``__all__`` setting on ``collections`` to include
346 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000347
Brett Cannoncf3520c2008-05-11 22:47:58 +0000348- The sre module has been removed.
349
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000350- The Queue module has been renamed to queue.
351
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000352- The copy_reg module has been renamed to copyreg.
353
Brett Cannond8b61ee2008-05-11 03:00:26 +0000354- The mhlib module has been removed.
355
Brett Cannonbd474422008-05-10 22:42:14 +0000356- The ihooks module has been removed.
357
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000358- The fpformat module has been removed.
359
Brett Cannonf4fd9932008-05-10 21:11:46 +0000360- The dircache module has been removed.
361
Brett Cannond175b4c2008-05-10 03:19:54 +0000362- The Canvas module has been removed.
363
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000364- The Decimal module gained the magic methods __round__, __ceil__,
365 __floor__ and __trunc__, to give support for round, math.ceil,
366 math.floor and math.trunc.
367
Brett Cannon900ee3a2008-05-08 20:31:11 +0000368- The user module has been removed.
369
Brett Cannon34afe872008-05-08 20:31:44 +0000370- The mutex module has been removed.
371
Brett Cannon0d71ee72008-05-08 18:13:40 +0000372- The imputil module has been removed.
373
Georg Brandl52b92cc2008-05-25 09:43:03 +0000374- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000375
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000376- pdb gained the "until" command.
377
Georg Brandl52b92cc2008-05-25 09:43:03 +0000378- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000379
Georg Brandl32de7af2008-08-18 23:07:41 +0000380- The threading module API was renamed to be PEP 8 compliant. The
381 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000382
Georg Brandl294d5a92008-06-01 19:25:32 +0000383Tools/Demos
384-----------
385
386- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000387
Brett Cannon0d71ee72008-05-08 18:13:40 +0000388Build
389-----
390
391
Barry Warsaw66079cd2008-04-04 01:36:36 +0000392What's New in Python 3.0a5?
393===========================
394
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000395*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000396
397Core and Builtins
398-----------------
399
Georg Brandl52b92cc2008-05-25 09:43:03 +0000400- Fixed misbehaviour of PyLong_FromSsize_t on systems where
401 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000402
Georg Brandl52b92cc2008-05-25 09:43:03 +0000403- Issue #2221: Corrected a SystemError "error return without exception
404 set", when the code executed by exec() raises an exception, and
405 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000406
Georg Brandl52b92cc2008-05-25 09:43:03 +0000407- Bug #2565: The repr() of type objects now calls them 'class', not
408 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000409
Martin v. Löwis790465f2008-04-05 20:41:37 +0000410- The command line processing was converted to pass Unicode strings
411 through as unmodified as possible; as a consequence, the C API
412 related to command line arguments was changed to use wchar_t.
413
Georg Brandl52b92cc2008-05-25 09:43:03 +0000414- All backslashes in raw strings are interpreted literally. This
415 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000416
Barry Warsaw66079cd2008-04-04 01:36:36 +0000417Extension Modules
418-----------------
419
420Library
421-------
422
Georg Brandl52b92cc2008-05-25 09:43:03 +0000423- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000424
Thomas Hellere106dc32008-04-24 18:39:36 +0000425- Issue #2682: ctypes callback functions now longer contain a cyclic
426 reference to themselves.
427
Georg Brandl52b92cc2008-05-25 09:43:03 +0000428- Issue #2058: Remove the buf attribute and add __slots__ to the
429 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000430
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000431- Bug #2606: Avoid calling .sort() on a dict_keys object.
432
Thomas Hellerbff533b2008-04-04 19:53:14 +0000433- The bundled libffi copy is now in sync with the recently released
434 libffi3.0.5 version, apart from some small changes to
435 Modules/_ctypes/libffi/configure.ac.
436
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000437Build
438-----
439
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000440- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
441
Guido van Rossumdc21db32008-04-07 18:37:41 +0000442- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000443 accidentally overwriting a Python 2.x installation. Use "make
444 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000445
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000446- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
447 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000448
Georg Brandl52b92cc2008-05-25 09:43:03 +0000449
Barry Warsawa9d499d2008-03-01 18:38:07 +0000450What's New in Python 3.0a4?
451===========================
452
Barry Warsawbb5cd082008-04-02 23:33:27 +0000453*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000454
Martin v. Löwis25931462008-03-17 20:43:42 +0000455Core and Builtins
456-----------------
457
458- Bug #2301: Don't try decoding the source code into the original
459 encoding for syntax errors.
460
Martin v. Löwis92fab752008-03-08 10:40:41 +0000461Extension Modules
462-----------------
463
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000464- The dl module was removed, use the ctypes module instead.
465
Martin v. Löwis92fab752008-03-08 10:40:41 +0000466- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000467
Martin v. Löwis071ef772008-03-08 11:24:24 +0000468Library
469-------
470
Georg Brandl52b92cc2008-05-25 09:43:03 +0000471- The class distutils.commands.build_py.build_py_2to3 can be used as a
472 build_py replacement to automatically run 2to3 on modules that are
473 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000474
Guido van Rossumf4169812008-03-17 22:56:06 +0000475- A new pickle protocol (protocol 3) is added with explicit support
476 for bytes. This is the default protocol. It intentionally cannot
477 be unpickled by Python 2.x.
478
479- When a pickle written by Python 2.x contains an (8-bit) str
480 instance, this is now decoded to a (Unicode) str instance. The
481 encoding used to do this defaults to ASCII, but can be overridden
482 via two new keyword arguments to the Unpickler class. Previously
483 this would create bytes instances, which is usually wrong: str
484 instances are often used to pickle attribute names etc., and text is
485 more common than binary data anyway.
486
Martin v. Löwis071ef772008-03-08 11:24:24 +0000487- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000488 system doesn't support CODESET and LANG isn't set or doesn't allow
489 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000490
Georg Brandl52b92cc2008-05-25 09:43:03 +0000491- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
492 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000493
Georg Brandl52b92cc2008-05-25 09:43:03 +0000494- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
495 has been renamed tokenize and now works with bytes rather than
496 strings. A new detect_encoding function has been added for
497 determining source file encoding according to PEP-0263. Token
498 sequences returned by tokenize always start with an ENCODING token
499 which specifies the encoding used to decode the file. This token is
500 used to encode the output of untokenize back to bytes.
501
Barry Warsawa9d499d2008-03-01 18:38:07 +0000502
Christian Heimesbc873412007-12-08 22:11:32 +0000503What's New in Python 3.0a3?
504===========================
505
Barry Warsaw659fc422008-03-01 17:45:23 +0000506*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000507
508Core and Builtins
509-----------------
510
Georg Brandl52b92cc2008-05-25 09:43:03 +0000511- Issue #2282: io.TextIOWrapper was not overriding seekable() from
512 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000513
Georg Brandl52b92cc2008-05-25 09:43:03 +0000514- Issue #2115: Important speedup in setting __slot__ attributes. Also
515 prevent a possible crash: an Abstract Base Class would try to access
516 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000517
Georg Brandl52b92cc2008-05-25 09:43:03 +0000518- Fixed repr() and str() of complex numbers with infinity or nan as
519 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000520
Georg Brandl52b92cc2008-05-25 09:43:03 +0000521- Clear all free list during a gc.collect() of the highest generation
522 in order to allow pymalloc to free more arenas. Python may give back
523 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000524
Georg Brandl52b92cc2008-05-25 09:43:03 +0000525- Issue #2045: Fix an infinite recursion triggered when printing a
526 subclass of collections.defaultdict, if its default_factory is set
527 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000528
529- Fixed a minor memory leak in dictobject.c. The content of the free
530 list was not freed on interpreter shutdown.
531
Georg Brandl52b92cc2008-05-25 09:43:03 +0000532- Limit free list of method and builtin function objects to 256
533 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000534
Georg Brandl52b92cc2008-05-25 09:43:03 +0000535- Patch #1953: Added ``sys._compact_freelists()`` and the C API
536 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000537 to compact the internal free lists of pre-allocted ints and floats.
538
539- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000540 Python expected the return type int but the fork familie returns
541 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000542
Georg Brandl52b92cc2008-05-25 09:43:03 +0000543- Issue #1678380: Fix a bug that identifies 0j and -0j when they
544 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000545
Georg Brandl52b92cc2008-05-25 09:43:03 +0000546- Issue #2025: Added tuple.count() and tuple.index() methods to comply
547 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000548
Georg Brandl52b92cc2008-05-25 09:43:03 +0000549- Fixed multiple reinitialization of the Python interpreter. The small
550 int list in longobject.c has caused a seg fault during the third
551 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000552
Georg Brandl52b92cc2008-05-25 09:43:03 +0000553- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000554
Georg Brandl52b92cc2008-05-25 09:43:03 +0000555- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000556
Georg Brandl52b92cc2008-05-25 09:43:03 +0000557- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000558
Georg Brandl52b92cc2008-05-25 09:43:03 +0000559- map() no longer accepts None for the first argument. Use zip()
560 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000561
Facundo Batista2336bdd2008-01-19 19:12:01 +0000562- Issue #1769: Now int("- 1") is not allowed any more.
563
Georg Brandl52b92cc2008-05-25 09:43:03 +0000564- Object/longobject.c: long(float('nan')) raises an OverflowError
565 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000566
Georg Brandl52b92cc2008-05-25 09:43:03 +0000567- Issue #1762972: __file__ points to the source file instead of the
568 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000569
Guido van Rossumab078dd2008-01-06 00:09:11 +0000570- Issue #1393: object_richcompare() returns NotImplemented instead of
571 False if the objects aren't equal, to give the other side a chance.
572
Guido van Rossume239b002008-01-06 00:44:20 +0000573- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000574
Georg Brandl52b92cc2008-05-25 09:43:03 +0000575- Improve some exception messages when Windows fails to load an
576 extension module. Now we get for example '%1 is not a valid Win32
577 application' instead of 'error code 193'. Also use Unicode strings
578 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000579
Georg Brandl52b92cc2008-05-25 09:43:03 +0000580- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
581 Python C API has gained a new type *PyInstanceMethod_Type* and the
582 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
583 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000584
Georg Brandl52b92cc2008-05-25 09:43:03 +0000585- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
586 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
587 are now enough to print the corresponding list of objects considered
588 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000589
Georg Brandl52b92cc2008-05-25 09:43:03 +0000590- Issue #1573: Improper use of the keyword-only syntax makes the
591 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000592
Georg Brandl52b92cc2008-05-25 09:43:03 +0000593- Issue #1564: The set implementation should special-case PyUnicode
594 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000595
Guido van Rossumea6775b2008-02-21 20:16:31 +0000596- Patch #1031213: Decode source line in SyntaxErrors back to its
597 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000598
Christian Heimes09aaa882008-02-23 15:01:06 +0000599- inspect.getsource() includes the decorators again.
600
Guido van Rossumea6775b2008-02-21 20:16:31 +0000601- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
602 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000603
Georg Brandl52b92cc2008-05-25 09:43:03 +0000604- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
605 the first chunk fed to the decoder started with a BOM, but was
606 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000607
Christian Heimesbc873412007-12-08 22:11:32 +0000608Extension Modules
609-----------------
610
Georg Brandl52b92cc2008-05-25 09:43:03 +0000611- Code for itertools ifilter(), imap(), and izip() moved to bultins
612 and renamed to filter(), map(), and zip(). Also, renamed
613 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000614
Georg Brandl52b92cc2008-05-25 09:43:03 +0000615- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000616
Georg Brandl52b92cc2008-05-25 09:43:03 +0000617- Bug #2111: mmap segfaults when trying to write a block opened with
618 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000619
Georg Brandl52b92cc2008-05-25 09:43:03 +0000620- Issue #2063: correct order of utime and stime in os.times() result
621 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000622
Christian Heimesbc873412007-12-08 22:11:32 +0000623Library
624-------
625
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000626- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000627
Georg Brandl52b92cc2008-05-25 09:43:03 +0000628- Created new UserDict class in collections module. This one inherits
629 from and complies with the MutableMapping ABC. Also, moved
630 UserString and UserList to the collections module. The
631 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000632
Guido van Rossumea6775b2008-02-21 20:16:31 +0000633- Removed UserDict.DictMixin. Replaced all its uses with
634 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000635
Guido van Rossume239b002008-01-06 00:44:20 +0000636- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000637
Guido van Rossume239b002008-01-06 00:44:20 +0000638- Issue #1585: IDLE uses non-existent xrange() function.
639
640- Issue #1578: Problems in win_getpass.
641
Georg Brandl52d168a2008-01-07 18:10:24 +0000642Build
643-----
644
Georg Brandl52b92cc2008-05-25 09:43:03 +0000645- Renamed --enable-unicode configure flag to --with-wide-unicode,
646 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000647
Guido van Rossume239b002008-01-06 00:44:20 +0000648C API
649-----
650
651- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
652 Py_TYPE and Py_REFCNT.
653
Georg Brandl52b92cc2008-05-25 09:43:03 +0000654- New API PyImport_ImportModuleNoBlock(), works like
655 PyImport_ImportModule() but won't block on the import lock
656 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000657
Christian Heimesbc873412007-12-08 22:11:32 +0000658
Fred Drake0e474a82007-10-11 18:01:43 +0000659What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000660===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000661
Guido van Rossum99533a92007-12-06 05:07:41 +0000662*Release date: 07-Dec-2007*
663
664(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000665
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000666Core and Builtins
667-----------------
668
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000669- str8 now has the same construction signature as bytes.
670
Georg Brandl52b92cc2008-05-25 09:43:03 +0000671- Comparisons between str and str8 now return False/True for ==/!=.
672 sqlite3 returns str8 when recreating on object from it's __conform__
673 value. The struct module returns str8 for all string-related
674 formats. This was true before this change, but becomes more
675 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000676
Georg Brandl52b92cc2008-05-25 09:43:03 +0000677- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
678 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000679
680- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
681
682- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000683 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000684 `PyUnicode_DecodeFSDefault(char*)` was added.
685
Georg Brandl52b92cc2008-05-25 09:43:03 +0000686- io.open() and _fileio.FileIO have grown a new argument closefd. A
687 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000688
Georg Brandl52b92cc2008-05-25 09:43:03 +0000689- Added a new option -b to issues warnings (-bb for errors) about
690 certain operations between bytes/buffer and str like str(b'') and
691 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000692
Georg Brandl52b92cc2008-05-25 09:43:03 +0000693- The standards streams sys.stdin, stdout and stderr may be None when
694 the when the C runtime library returns an invalid file descriptor
695 for the streams (fileno(stdin) < 0). For now this happens only for
696 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000697
Christian Heimesbce52be2007-11-17 19:08:41 +0000698- Added PCbuild9 directory for VS 2008.
699
Georg Brandl52b92cc2008-05-25 09:43:03 +0000700- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
701 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000702
Georg Brandl52b92cc2008-05-25 09:43:03 +0000703- Unbound methods are gone for good. ClassObject.method returns an
704 ordinary function object, instance.method still returns a bound
705 method object. The API of bound methods is cleaned up, too. The
706 im_class attribute is removed and im_func + im_self are renamed to
707 __func__ and __self__. The factory PyMethod_New takes only func and
708 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000709
Georg Brandl52b92cc2008-05-25 09:43:03 +0000710- intobject.h is no longer included by Python.h. The remains were
711 moved to longobject.h. It still exists to define several aliases
712 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000713
Christian Heimesa37d4c62007-12-04 23:02:19 +0000714- Removed sys.maxint, use sys.maxsize instead.
715
Fred Drake0e474a82007-10-11 18:01:43 +0000716Extension Modules
717-----------------
718
719- The `hotshot` profiler has been removed; use `cProfile` instead.
720
Brett Cannone9fd2312007-10-12 19:18:19 +0000721Library
722-------
723
Georg Brandl52b92cc2008-05-25 09:43:03 +0000724- When loading an external file using testfile(), the passed-in
725 encoding argument was being ignored if __loader__ is defined and
726 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000727
Georg Brandl52b92cc2008-05-25 09:43:03 +0000728- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
729 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000730
Christian Heimesc9543e42007-11-28 08:28:28 +0000731- Removed the 'new' module.
732
Georg Brandl52b92cc2008-05-25 09:43:03 +0000733- Removed all types from the 'types' module that are easily accessable
734 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000735
Georg Brandl52d168a2008-01-07 18:10:24 +0000736
Guido van Rossum4405cf32007-08-30 17:16:55 +0000737What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000738==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000739
Guido van Rossum4405cf32007-08-30 17:16:55 +0000740*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000741
742Core and Builtins
743-----------------
744
Martin v. Löwis47383402007-08-15 07:32:56 +0000745- PEP 3131: Support non-ASCII identifiers.
746
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000747- PEP 3120: Change default encoding to UTF-8.
748
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000749- PEP 3123: Use proper C inheritance for PyObject.
750
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000751- Removed the __oct__ and __hex__ special methods and added a bin()
752 builtin function.
753
Georg Brandl52b92cc2008-05-25 09:43:03 +0000754- PEP 3127: octal literals now start with "0o". Old-style octal
755 literals are invalid. There are binary literals with a prefix of
756 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000757
Guido van Rossume7ba4952007-06-06 23:52:48 +0000758- None, True, False are now keywords.
759
Guido van Rossum29478ef2007-05-29 00:39:44 +0000760- PEP 3119: isinstance() and issubclass() can be overridden.
761
Guido van Rossumebe3e162007-05-17 18:20:34 +0000762- Remove BaseException.message.
763
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000764- Remove tuple parameter unpacking (PEP 3113).
765
Georg Brandl52b92cc2008-05-25 09:43:03 +0000766- Remove the f_restricted attribute from frames. This naturally leads
767 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000768
Georg Brandl52b92cc2008-05-25 09:43:03 +0000769- PEP 3132 was accepted. That means that you can do ``a, *b =
770 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000771
Georg Brandl52b92cc2008-05-25 09:43:03 +0000772- range() now returns an iterator rather than a list. Floats are not
773 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000774
Nick Coghlan650f0d02007-04-15 12:05:43 +0000775- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000776 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000777
Guido van Rossume27dc722007-03-27 22:37:34 +0000778- By default, != returns the opposite of ==, unless the latter returns
779 NotImplemented.
780
Georg Brandl52b92cc2008-05-25 09:43:03 +0000781- Patch #1680961: sys.exitfunc has been removed and replaced with a
782 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000783
Georg Brandl801dd732007-03-18 20:18:31 +0000784- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000785 keyword arg in the class statement, which can now use the full
786 syntax of a parameter list. Also, the metaclass can implement a
787 __prepare__ function which will be called to create the dictionary
788 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000789
Georg Brandl428f0642007-03-18 18:35:15 +0000790- The long-deprecated argument "pend" of PyFloat_FromString() has been
791 removed.
792
Georg Brandle32b4222007-03-10 22:13:27 +0000793- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000794 its argument, if it exists. If not, it will work like before. This
795 allows customizing the output of dir() in the presence of a
796 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000797
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000798- Removed support for __members__ and __methods__.
799
Georg Brandle32b4222007-03-10 22:13:27 +0000800- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000801
Georg Brandle32b4222007-03-10 22:13:27 +0000802- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000803 functionality formerly known as raw_input(); the name raw_input() is
804 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000805
Georg Brandl52b92cc2008-05-25 09:43:03 +0000806- Classes listed in an 'except' clause must inherit from
807 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000808
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000809- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000810 and .keys(), .items(), .values() return dict views, which behave
811 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000812
Guido van Rossum8b545362007-02-09 23:52:14 +0000813- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000814 'softspace' attribute of files is now gone (since print() doesn't
815 use it). A side effect of this change is that you can get
816 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000817
818 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000819 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000820
821 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000822
Brett Cannon398db8b2007-01-29 23:44:37 +0000823- PEP 3102: keyword-only arguments.
824
Georg Brandl52b92cc2008-05-25 09:43:03 +0000825- Int/Long unification is complete. The 'long' built-in type and
826 literals with trailing 'L' or 'l' have been removed. Performance
827 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000828
829- 'except E, V' must now be spelled as 'except E as V' and deletes V
830 at the end of the except clause; V must be a simple name.
831
Neal Norwitzc1505362006-12-28 06:47:50 +0000832- Added function annotations per PEP 3107.
833
Georg Brandl52b92cc2008-05-25 09:43:03 +0000834- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000835
836 >>> def f(x):
837 ... def inc():
838 ... nonlocal x
839 ... x += 1
840 ... return x
841 ... return inc
842 ...
843 >>> inc = f(0)
844 >>> inc()
845 1
846 >>> inc()
847 2
848
Georg Brandl66a796e2006-12-19 20:50:34 +0000849- Moved intern() to sys.intern().
850
851- exec is now a function.
852
853- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000854
Neal Norwitz4886cc32006-08-21 17:06:07 +0000855- Classic classes are a thing of the past. All classes are new style.
856
857- Exceptions *must* derive from BaseException.
858
859- Integer division always returns a float. The -Q option is no more.
860 All the following are gone:
861 * PyNumber_Divide and PyNumber_InPlaceDivide
862 * __div__, __rdiv__, and __idiv__
863 * nb_divide, nb_inplace_divide
864 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
865 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
866 if we want to re-use __div__ and friends. If we do, it will make
867 it harder to write code for both 2.x and 3.x.)
868
869- 'as' and 'with' are keywords.
870
871- Absolute import is the default behavior for 'import foo' etc.
872
Georg Brandl52b92cc2008-05-25 09:43:03 +0000873- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000874
Georg Brandl52b92cc2008-05-25 09:43:03 +0000875- Removed these Python builtins: apply(), callable(), coerce(),
876 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000877
Georg Brandl52b92cc2008-05-25 09:43:03 +0000878- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000879
Georg Brandl52b92cc2008-05-25 09:43:03 +0000880- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000881
882- Remove C API support for restricted execution.
883
Guido van Rossumcf1be882007-08-30 22:07:17 +0000884- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000885 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000886 sequences of unequal length -- it now stops after the shortest one
887 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000888
Georg Brandl52b92cc2008-05-25 09:43:03 +0000889- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000890
891- Added class decorators per PEP 3129.
892
893
894Extension Modules
895-----------------
896
Georg Brandl52b92cc2008-05-25 09:43:03 +0000897- Removed the imageop module. Obsolete long with its unit tests
898 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000899
Georg Brandl52b92cc2008-05-25 09:43:03 +0000900- Removed these attributes from the operator module: div, idiv,
901 __div__, __idiv__, isCallable, sequenceIncludes.
902
903- Removed these attributes from the sys module: exc_clear(), exc_type,
904 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000905
906
907Library
908-------
909
Georg Brandl52b92cc2008-05-25 09:43:03 +0000910- Removed the compiler package. Use of the _ast module and (an
911 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000912
Georg Brandl52b92cc2008-05-25 09:43:03 +0000913- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
914 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
915 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000916
Georg Brandl52b92cc2008-05-25 09:43:03 +0000917- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000918
Georg Brandl52b92cc2008-05-25 09:43:03 +0000919- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
920 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
921 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000922
Georg Brandl52b92cc2008-05-25 09:43:03 +0000923- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000924
Georg Brandl52b92cc2008-05-25 09:43:03 +0000925- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000926 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000927
Georg Brandl52b92cc2008-05-25 09:43:03 +0000928- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000929
Georg Brandl52b92cc2008-05-25 09:43:03 +0000930- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000931
932- Patch #1680961: atexit has been reimplemented in C.
933
Walter Dörwald41980ca2007-08-16 21:55:45 +0000934- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
935
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000936Build
937-----
938
939C API
940-----
941
Georg Brandl52b92cc2008-05-25 09:43:03 +0000942- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000943
Georg Brandl52b92cc2008-05-25 09:43:03 +0000944- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
945 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000946
Georg Brandl52b92cc2008-05-25 09:43:03 +0000947- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000948
Georg Brandl52b92cc2008-05-25 09:43:03 +0000949- Removed these macros: staticforward, statichere, PyArg_GetInt,
950 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000951
Georg Brandl52b92cc2008-05-25 09:43:03 +0000952- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
953 intintobjargproc, getreadbufferproc, getwritebufferproc,
954 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000955
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000956Tests
957-----
958
Brett Cannone7a30f72008-03-03 03:36:27 +0000959- Removed test.testall as test.regrtest replaces it.
960
Brett Cannonced04e02005-02-13 22:53:22 +0000961Documentation
962-------------
963
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000964Mac
965---
966
Georg Brandl52b92cc2008-05-25 09:43:03 +0000967- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +0000968
Guido van Rossum845702c2007-08-30 18:44:53 +0000969Platforms
970---------
971
972- Support for BeOS and AtheOS was removed (according to PEP 11).
973
974- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
975
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000976Tools/Demos
977-----------
978
Georg Brandl52b92cc2008-05-25 09:43:03 +0000979
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000980**(For information about older versions, consult the HISTORY file.)**