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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
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +00007What's new in Python 3.0b3?
8===========================
9
10*Release date: XX-XXX-2008*
11
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000012Core and Builtins
13-----------------
14
Antoine Pitrou616d2852008-08-19 22:09:34 +000015- Issue #2394: implement more of the memoryview API, with the caveat that
16 only one-dimensional contiguous buffers are supported and exercised right
17 now. Slicing, slice assignment and comparison (equality and inequality)
18 have been added. Also, the tolist() method has been implemented, but only
19 for byte buffers. Endly, the API has been updated to return bytes objects
20 wherever it used to return bytearrays.
21
Antoine Pitrouee58fa42008-08-19 18:22:14 +000022- Issue #3560: clean up the new C PyMemoryView API so that naming is
23 internally consistent; add macros PyMemoryView_GET_BASE() and
24 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
25 without relying on a particular implementation; remove the ill-named
26 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
27
Thomas Hellerf5049fc2008-08-19 19:49:49 +000028- ctypes function pointers that are COM methods have a boolean True
29 value again.
30
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000031- Issue #1819: function calls with several named parameters are now on
32 average 35% faster (as measured by pybench).
33
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +000034- The undocumented C APIs PyUnicode_AsString() and
35 PyUnicode_AsStringAndSize() were made private to the interpreter, in
36 order to be able to refine their interfaces for Python 3.1.
37
38 If you need to access the UTF-8 representation of a Unicode object
39 as bytes string, please use PyUnicode_AsUTF8String() instead.
40
Antoine Pitrouaf14b792008-08-07 21:50:41 +000041- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
42 to Python 3.0's stricter semantics which allow to avoid successive
43 reallocations of the result string (this also affects str.join()).
44
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +000045
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000046Library
47-------
48
Antoine Pitroufd036452008-08-19 17:56:33 +000049- Issue #2834: update the regular expression library to match the unicode
50 standards of py3k. In other words, mixing bytes and unicode strings
51 (be it as pattern, search string or replacement string) raises a TypeError.
52 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
53 and can be disabled by specifying a new re.ASCII flag; as for bytes
54 patterns, ASCII matching is the only option and trying to specify re.UNICODE
55 for such patterns raises a ValueError.
56
Guido van Rossum52dbbb92008-08-18 21:44:30 +000057- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
58 Code contributed by Matt Giuca. quote() now encodes the input
59 before quoting, unquote() decodes after unquoting. There are
60 new arguments to change the encoding and errors settings.
61 There are also new APIs to skip the encode/decode steps.
62 [un]quote_plus() are also affected.
63
Nick Coghlan36f49522008-08-18 12:31:52 +000064- Issue #2235: numbers.Number now blocks inheritance of the default id()
65 based hash because that hash mechanism is not correct for numeric types.
66 All concrete numeric types that inherit from Number (rather than just
67 registering with it) must explicitly provide a hash implementation in
68 order for their instances to be hashable.
69
Benjamin Peterson4cd6a952008-08-17 20:23:46 +000070- Issue #2676: in the email package, content-type parsing was hanging on
71 pathological input because of quadratic or exponential behaviour of a
72 regular expression.
73
Antoine Pitrou87695762008-08-14 22:44:29 +000074- Issue #3476: binary buffered reading through the new "io" library is now
75 thread-safe.
76
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +000077- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
78 menu entries were not deleted.
79
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +000080- Remove the TarFileCompat class from tarfile.py.
81
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +000082- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
83 accepts the same parameters. It just checks that its first argument is an
84 integer.
85
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000086- Issue #3394: zipfile.writestr sets external attributes when passed a
87 file name rather than a ZipInfo instance, so files are extracted with
88 mode 0600 rather than 000 under Unix.
89
Antoine Pitrouc66f9092008-07-28 19:46:11 +000090- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
91 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000092
Martin v. Löwis371bb502008-08-16 13:02:57 +000093Extension Modules
94-----------------
95
96- Bug #3542: Support Unicode strings in _msi module.
97
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +000098What's new in Python 3.0b2?
99===========================
100
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000101*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000102
103Core and Builtins
104-----------------
105
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000106- Issue #3008: the float type has a new instance method 'float.hex'
107 and a new class method 'float.fromhex' to convert floating-point
108 numbers to and from hexadecimal strings, respectively.
109
Eric Smithd68af8f2008-07-16 00:15:35 +0000110- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
111 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
112
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000113- Issue #3280: like chr(), the "%c" format now accepts unicode code points
114 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
115 "narrow Unicode" builds, the result is a string of 2 code units, forming a
116 UTF-16 surrogate pair.
117
Georg Brandld52429f2008-07-04 15:55:02 +0000118- Issue #3282: str.isprintable() should return False for undefined
119 Unicode characters.
120
Martin v. Löwis029656f2008-06-30 04:06:08 +0000121- Issue #3236: Return small longs from PyLong_FromString.
122
Benjamin Petersone6528212008-07-15 15:32:09 +0000123- Exception tracebacks now support exception chaining.
124
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000125Library
126-------
127
Brett Cannonc2542e92008-07-25 18:19:20 +0000128- Removed the sunaudio module. Use sunau instead.
129
Thomas Heller47bc8092008-08-19 06:38:12 +0000130- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
131 api functions without holding the GIL, which could lead to a fatal
132 error when they failed.
133
134- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
135
Georg Brandl30704ea02008-07-23 15:07:12 +0000136- Removed "ast" function aliases from the parser module.
137
Thomas Heller15383a02008-07-15 19:46:52 +0000138- Issue #3313: Fixed a crash when a failed dlopen() call does not set
139 a valid dlerror() message.
140
Thomas Heller0261e1e2008-07-15 17:25:07 +0000141- Issue #3258: Fixed a crash when a ctypes POINTER type to an
142 incomplete structure was created.
143
Georg Brandl1abcbf82008-07-01 19:28:43 +0000144- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
145 argument now must be a bytes object in any case.
146
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000147- Issue #3145: help("modules whatever") failed when trying to load the source
148 code of every single module of the standard library, including invalid files
149 used in the test suite.
150
Georg Brandlbded4d32008-07-17 18:15:35 +0000151- The gettext library now consistently uses Unicode strings for message ids
152 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000153
Benjamin Petersone6528212008-07-15 15:32:09 +0000154- The traceback module has been expanded to handle chained exceptions.
155
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000156C API
157-----
158
159- Issue #3247: the function Py_FindMethod was removed. Modern types should
160 use the tp_methods slot instead.
161
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000162Tools/Demos
163-----------
164
Georg Brandl336341f2008-07-01 20:21:28 +0000165- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000166
Georg Brandl336341f2008-07-01 20:21:28 +0000167- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000168
169
Brett Cannon0d71ee72008-05-08 18:13:40 +0000170What's new in Python 3.0b1?
171===========================
172
Barry Warsawc1e689e2008-06-19 00:35:43 +0000173*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000174
175Core and Builtins
176-----------------
177
Brett Cannondb734912008-06-27 00:52:15 +0000178- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
179 argument being anything other than a dict or None. Also fixed a bug in error
180 handling when 'message' and 'category' were both set to None, triggering a
181 bus error.
182
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000183- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
184 holds the last (strong) reference to its referent.
185
Georg Brandl559e5d72008-06-11 18:37:52 +0000186- Issue #2630: implement PEP 3138. repr() now returns printable
187 Unicode characters unescaped, to get an ASCII-only representation
188 of an object use ascii().
189
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000190- Issue #1342: On windows, Python could not start when installed in a
191 directory with non-ascii characters.
192
Martin v. Löwis1a214512008-06-11 05:26:20 +0000193- Implement PEP 3121: new module initialization and finalization API.
194
Georg Brandle1b5ac62008-06-04 13:06:58 +0000195- Removed the already-defunct ``-t`` option.
196
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000197- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
198 unmarshalling many code objects, which happens when importing a
199 large .pyc file (~1000 functions).
200
Georg Brandl52b92cc2008-05-25 09:43:03 +0000201- Issue #2963: fix merging oversight that disabled method cache for
202 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000203
Georg Brandlc9b09532008-05-25 09:24:38 +0000204- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
205
Georg Brandl52b92cc2008-05-25 09:43:03 +0000206- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000207
Georg Brandl52b92cc2008-05-25 09:43:03 +0000208- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
209 code now allows any unicode string and returns a utf-8 encoded
210 buffer, just like the "s#" code already does. The "z" code was
211 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000212
Georg Brandl52b92cc2008-05-25 09:43:03 +0000213- Issue #2863: generators now have a ``gen.__name__`` attribute that
214 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
215 ``func.func_code.co_name``. The repr() of a generator now also
216 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000217
218- Issue #2831: enumerate() now has a ``start`` argument.
219
Georg Brandl52b92cc2008-05-25 09:43:03 +0000220- Issue #2801: fix bug in the float.is_integer method where a
221 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000222
Georg Brandl52b92cc2008-05-25 09:43:03 +0000223- The ``--with-toolbox-glue`` option (and the associated
224 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000225
Georg Brandl52b92cc2008-05-25 09:43:03 +0000226- Issue #2196: hasattr() now lets exceptions which do not inherit
227 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
228 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000229
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000230- #3021 Exception reraising sematics have been significantly improved. However,
231 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
232 code anymore.
233
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000234- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
235 removed.
236
Brett Cannon0d71ee72008-05-08 18:13:40 +0000237Extension Modules
238-----------------
239
Georg Brandl38feaf02008-05-25 07:45:51 +0000240- Renamed ``_winreg`` module to ``winreg``.
241
Georg Brandl52b92cc2008-05-25 09:43:03 +0000242- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
243 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000244
245- Support for Windows 9x has been removed from the winsound module.
246
Georg Brandl52b92cc2008-05-25 09:43:03 +0000247- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000248
Brett Cannon0d71ee72008-05-08 18:13:40 +0000249Library
250-------
251
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000252- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
253 symtable.Symbol have been removed.
254
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000255- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
256
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000257- a new ``urllib`` package was created. It consists of code from
258 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
259 modules have all been removed. The new package has five submodules:
260 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
261 ``urllib.error``, and ``urllib.robotparser``. The
262 ``urllib.request.urlopen()`` function uses the url opener from
263 ``urllib2``. (Note that the unittests have not been renamed for the
264 beta, but they will be renamed in the future.)
265
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000266- rfc822 has been removed in favor of the email package.
267
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000268- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000269
Barry Warsawf5019422008-06-12 02:42:00 +0000270- Patch #2849: Remove use of rfc822 module from standard library.
271
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000272- Added C optimized implementation of io.StringIO.
273
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000274- The ``pickle`` module is now automatically use an optimized C
275 implementation of Pickler and Unpickler when available. The
276 ``cPickle`` module is no longer needed.
277
Georg Brandl877b10a2008-06-01 21:25:55 +0000278- Removed the ``htmllib`` and ``sgmllib`` modules.
279
Georg Brandl61013952008-05-28 15:56:30 +0000280- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
281 been removed from ``http.cookies``.
282
Brett Cannona23810f2008-05-26 19:04:21 +0000283- The ``commands`` module has been removed. Its getoutput() and
284 getstatusoutput() functions have been moved to the ``subprocess`` module.
285
Georg Brandl3d5c4252008-05-26 18:03:26 +0000286- The ``http`` package was created; it contains the old ``httplib``
287 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
288 as ``http.cookiejar``, and the content of the three ``HTTPServer``
289 modules as ``http.server``.
290
Georg Brandl38eceaa2008-05-26 11:14:17 +0000291- The ``xmlrpc`` package was created; it contains the old
292 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
293 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000294 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000295
296- The ``dbm`` package was created, containing the old modules
297 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
298 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
299 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
300 as submodules.
301
Georg Brandl52b92cc2008-05-25 09:43:03 +0000302- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000303
Georg Brandl52b92cc2008-05-25 09:43:03 +0000304- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000305
Georg Brandl52b92cc2008-05-25 09:43:03 +0000306- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000307
Georg Brandl52b92cc2008-05-25 09:43:03 +0000308- Issue #2250: Exceptions raised during evaluation of names in
309 rlcompleter's ``Completer.complete()`` method are now caught and
310 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000311
Georg Brandl52b92cc2008-05-25 09:43:03 +0000312- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
313 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000314
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000315- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
316 large to fit in a C long. ldexp(x, n) now returns a zero (with
317 suitable sign) if n is large and negative; previously, it raised
318 OverflowError.
319
Georg Brandl52b92cc2008-05-25 09:43:03 +0000320- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000321
Georg Brandl52b92cc2008-05-25 09:43:03 +0000322- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000323
Georg Brandl52b92cc2008-05-25 09:43:03 +0000324- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000325
Georg Brandl52b92cc2008-05-25 09:43:03 +0000326- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000327
Georg Brandl52b92cc2008-05-25 09:43:03 +0000328- Fixed the ``__all__`` setting on ``collections`` to include
329 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000330
Brett Cannoncf3520c2008-05-11 22:47:58 +0000331- The sre module has been removed.
332
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000333- The Queue module has been renamed to queue.
334
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000335- The copy_reg module has been renamed to copyreg.
336
Brett Cannond8b61ee2008-05-11 03:00:26 +0000337- The mhlib module has been removed.
338
Brett Cannonbd474422008-05-10 22:42:14 +0000339- The ihooks module has been removed.
340
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000341- The fpformat module has been removed.
342
Brett Cannonf4fd9932008-05-10 21:11:46 +0000343- The dircache module has been removed.
344
Brett Cannond175b4c2008-05-10 03:19:54 +0000345- The Canvas module has been removed.
346
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000347- The Decimal module gained the magic methods __round__, __ceil__,
348 __floor__ and __trunc__, to give support for round, math.ceil,
349 math.floor and math.trunc.
350
Brett Cannon900ee3a2008-05-08 20:31:11 +0000351- The user module has been removed.
352
Brett Cannon34afe872008-05-08 20:31:44 +0000353- The mutex module has been removed.
354
Brett Cannon0d71ee72008-05-08 18:13:40 +0000355- The imputil module has been removed.
356
Georg Brandl52b92cc2008-05-25 09:43:03 +0000357- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000358
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000359- pdb gained the "until" command.
360
Georg Brandl52b92cc2008-05-25 09:43:03 +0000361- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000362
Georg Brandl32de7af2008-08-18 23:07:41 +0000363- The threading module API was renamed to be PEP 8 compliant. The
364 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000365
Georg Brandl294d5a92008-06-01 19:25:32 +0000366Tools/Demos
367-----------
368
369- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000370
Brett Cannon0d71ee72008-05-08 18:13:40 +0000371Build
372-----
373
374
Barry Warsaw66079cd2008-04-04 01:36:36 +0000375What's New in Python 3.0a5?
376===========================
377
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000378*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000379
380Core and Builtins
381-----------------
382
Georg Brandl52b92cc2008-05-25 09:43:03 +0000383- Fixed misbehaviour of PyLong_FromSsize_t on systems where
384 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000385
Georg Brandl52b92cc2008-05-25 09:43:03 +0000386- Issue #2221: Corrected a SystemError "error return without exception
387 set", when the code executed by exec() raises an exception, and
388 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000389
Georg Brandl52b92cc2008-05-25 09:43:03 +0000390- Bug #2565: The repr() of type objects now calls them 'class', not
391 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000392
Martin v. Löwis790465f2008-04-05 20:41:37 +0000393- The command line processing was converted to pass Unicode strings
394 through as unmodified as possible; as a consequence, the C API
395 related to command line arguments was changed to use wchar_t.
396
Georg Brandl52b92cc2008-05-25 09:43:03 +0000397- All backslashes in raw strings are interpreted literally. This
398 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000399
Barry Warsaw66079cd2008-04-04 01:36:36 +0000400Extension Modules
401-----------------
402
403Library
404-------
405
Georg Brandl52b92cc2008-05-25 09:43:03 +0000406- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000407
Thomas Hellere106dc32008-04-24 18:39:36 +0000408- Issue #2682: ctypes callback functions now longer contain a cyclic
409 reference to themselves.
410
Georg Brandl52b92cc2008-05-25 09:43:03 +0000411- Issue #2058: Remove the buf attribute and add __slots__ to the
412 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000413
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000414- Bug #2606: Avoid calling .sort() on a dict_keys object.
415
Thomas Hellerbff533b2008-04-04 19:53:14 +0000416- The bundled libffi copy is now in sync with the recently released
417 libffi3.0.5 version, apart from some small changes to
418 Modules/_ctypes/libffi/configure.ac.
419
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000420Build
421-----
422
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000423- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
424
Guido van Rossumdc21db32008-04-07 18:37:41 +0000425- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000426 accidentally overwriting a Python 2.x installation. Use "make
427 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000428
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000429- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
430 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000431
Georg Brandl52b92cc2008-05-25 09:43:03 +0000432
Barry Warsawa9d499d2008-03-01 18:38:07 +0000433What's New in Python 3.0a4?
434===========================
435
Barry Warsawbb5cd082008-04-02 23:33:27 +0000436*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000437
Martin v. Löwis25931462008-03-17 20:43:42 +0000438Core and Builtins
439-----------------
440
441- Bug #2301: Don't try decoding the source code into the original
442 encoding for syntax errors.
443
Martin v. Löwis92fab752008-03-08 10:40:41 +0000444Extension Modules
445-----------------
446
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000447- The dl module was removed, use the ctypes module instead.
448
Martin v. Löwis92fab752008-03-08 10:40:41 +0000449- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000450
Martin v. Löwis071ef772008-03-08 11:24:24 +0000451Library
452-------
453
Georg Brandl52b92cc2008-05-25 09:43:03 +0000454- The class distutils.commands.build_py.build_py_2to3 can be used as a
455 build_py replacement to automatically run 2to3 on modules that are
456 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000457
Guido van Rossumf4169812008-03-17 22:56:06 +0000458- A new pickle protocol (protocol 3) is added with explicit support
459 for bytes. This is the default protocol. It intentionally cannot
460 be unpickled by Python 2.x.
461
462- When a pickle written by Python 2.x contains an (8-bit) str
463 instance, this is now decoded to a (Unicode) str instance. The
464 encoding used to do this defaults to ASCII, but can be overridden
465 via two new keyword arguments to the Unpickler class. Previously
466 this would create bytes instances, which is usually wrong: str
467 instances are often used to pickle attribute names etc., and text is
468 more common than binary data anyway.
469
Martin v. Löwis071ef772008-03-08 11:24:24 +0000470- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000471 system doesn't support CODESET and LANG isn't set or doesn't allow
472 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000473
Georg Brandl52b92cc2008-05-25 09:43:03 +0000474- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
475 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000476
Georg Brandl52b92cc2008-05-25 09:43:03 +0000477- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
478 has been renamed tokenize and now works with bytes rather than
479 strings. A new detect_encoding function has been added for
480 determining source file encoding according to PEP-0263. Token
481 sequences returned by tokenize always start with an ENCODING token
482 which specifies the encoding used to decode the file. This token is
483 used to encode the output of untokenize back to bytes.
484
Barry Warsawa9d499d2008-03-01 18:38:07 +0000485
Christian Heimesbc873412007-12-08 22:11:32 +0000486What's New in Python 3.0a3?
487===========================
488
Barry Warsaw659fc422008-03-01 17:45:23 +0000489*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000490
491Core and Builtins
492-----------------
493
Georg Brandl52b92cc2008-05-25 09:43:03 +0000494- Issue #2282: io.TextIOWrapper was not overriding seekable() from
495 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000496
Georg Brandl52b92cc2008-05-25 09:43:03 +0000497- Issue #2115: Important speedup in setting __slot__ attributes. Also
498 prevent a possible crash: an Abstract Base Class would try to access
499 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000500
Georg Brandl52b92cc2008-05-25 09:43:03 +0000501- Fixed repr() and str() of complex numbers with infinity or nan as
502 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000503
Georg Brandl52b92cc2008-05-25 09:43:03 +0000504- Clear all free list during a gc.collect() of the highest generation
505 in order to allow pymalloc to free more arenas. Python may give back
506 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000507
Georg Brandl52b92cc2008-05-25 09:43:03 +0000508- Issue #2045: Fix an infinite recursion triggered when printing a
509 subclass of collections.defaultdict, if its default_factory is set
510 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000511
512- Fixed a minor memory leak in dictobject.c. The content of the free
513 list was not freed on interpreter shutdown.
514
Georg Brandl52b92cc2008-05-25 09:43:03 +0000515- Limit free list of method and builtin function objects to 256
516 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000517
Georg Brandl52b92cc2008-05-25 09:43:03 +0000518- Patch #1953: Added ``sys._compact_freelists()`` and the C API
519 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000520 to compact the internal free lists of pre-allocted ints and floats.
521
522- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000523 Python expected the return type int but the fork familie returns
524 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000525
Georg Brandl52b92cc2008-05-25 09:43:03 +0000526- Issue #1678380: Fix a bug that identifies 0j and -0j when they
527 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000528
Georg Brandl52b92cc2008-05-25 09:43:03 +0000529- Issue #2025: Added tuple.count() and tuple.index() methods to comply
530 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000531
Georg Brandl52b92cc2008-05-25 09:43:03 +0000532- Fixed multiple reinitialization of the Python interpreter. The small
533 int list in longobject.c has caused a seg fault during the third
534 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000535
Georg Brandl52b92cc2008-05-25 09:43:03 +0000536- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000537
Georg Brandl52b92cc2008-05-25 09:43:03 +0000538- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000539
Georg Brandl52b92cc2008-05-25 09:43:03 +0000540- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000541
Georg Brandl52b92cc2008-05-25 09:43:03 +0000542- map() no longer accepts None for the first argument. Use zip()
543 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000544
Facundo Batista2336bdd2008-01-19 19:12:01 +0000545- Issue #1769: Now int("- 1") is not allowed any more.
546
Georg Brandl52b92cc2008-05-25 09:43:03 +0000547- Object/longobject.c: long(float('nan')) raises an OverflowError
548 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000549
Georg Brandl52b92cc2008-05-25 09:43:03 +0000550- Issue #1762972: __file__ points to the source file instead of the
551 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000552
Guido van Rossumab078dd2008-01-06 00:09:11 +0000553- Issue #1393: object_richcompare() returns NotImplemented instead of
554 False if the objects aren't equal, to give the other side a chance.
555
Guido van Rossume239b002008-01-06 00:44:20 +0000556- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000557
Georg Brandl52b92cc2008-05-25 09:43:03 +0000558- Improve some exception messages when Windows fails to load an
559 extension module. Now we get for example '%1 is not a valid Win32
560 application' instead of 'error code 193'. Also use Unicode strings
561 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000562
Georg Brandl52b92cc2008-05-25 09:43:03 +0000563- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
564 Python C API has gained a new type *PyInstanceMethod_Type* and the
565 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
566 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000567
Georg Brandl52b92cc2008-05-25 09:43:03 +0000568- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
569 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
570 are now enough to print the corresponding list of objects considered
571 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000572
Georg Brandl52b92cc2008-05-25 09:43:03 +0000573- Issue #1573: Improper use of the keyword-only syntax makes the
574 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000575
Georg Brandl52b92cc2008-05-25 09:43:03 +0000576- Issue #1564: The set implementation should special-case PyUnicode
577 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000578
Guido van Rossumea6775b2008-02-21 20:16:31 +0000579- Patch #1031213: Decode source line in SyntaxErrors back to its
580 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000581
Christian Heimes09aaa882008-02-23 15:01:06 +0000582- inspect.getsource() includes the decorators again.
583
Guido van Rossumea6775b2008-02-21 20:16:31 +0000584- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
585 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000586
Georg Brandl52b92cc2008-05-25 09:43:03 +0000587- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
588 the first chunk fed to the decoder started with a BOM, but was
589 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000590
Christian Heimesbc873412007-12-08 22:11:32 +0000591Extension Modules
592-----------------
593
Georg Brandl52b92cc2008-05-25 09:43:03 +0000594- Code for itertools ifilter(), imap(), and izip() moved to bultins
595 and renamed to filter(), map(), and zip(). Also, renamed
596 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000597
Georg Brandl52b92cc2008-05-25 09:43:03 +0000598- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000599
Georg Brandl52b92cc2008-05-25 09:43:03 +0000600- Bug #2111: mmap segfaults when trying to write a block opened with
601 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000602
Georg Brandl52b92cc2008-05-25 09:43:03 +0000603- Issue #2063: correct order of utime and stime in os.times() result
604 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000605
Christian Heimesbc873412007-12-08 22:11:32 +0000606Library
607-------
608
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000609- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000610
Georg Brandl52b92cc2008-05-25 09:43:03 +0000611- Created new UserDict class in collections module. This one inherits
612 from and complies with the MutableMapping ABC. Also, moved
613 UserString and UserList to the collections module. The
614 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000615
Guido van Rossumea6775b2008-02-21 20:16:31 +0000616- Removed UserDict.DictMixin. Replaced all its uses with
617 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000618
Guido van Rossume239b002008-01-06 00:44:20 +0000619- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000620
Guido van Rossume239b002008-01-06 00:44:20 +0000621- Issue #1585: IDLE uses non-existent xrange() function.
622
623- Issue #1578: Problems in win_getpass.
624
Georg Brandl52d168a2008-01-07 18:10:24 +0000625Build
626-----
627
Georg Brandl52b92cc2008-05-25 09:43:03 +0000628- Renamed --enable-unicode configure flag to --with-wide-unicode,
629 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000630
Guido van Rossume239b002008-01-06 00:44:20 +0000631C API
632-----
633
634- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
635 Py_TYPE and Py_REFCNT.
636
Georg Brandl52b92cc2008-05-25 09:43:03 +0000637- New API PyImport_ImportModuleNoBlock(), works like
638 PyImport_ImportModule() but won't block on the import lock
639 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000640
Christian Heimesbc873412007-12-08 22:11:32 +0000641
Fred Drake0e474a82007-10-11 18:01:43 +0000642What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000643===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000644
Guido van Rossum99533a92007-12-06 05:07:41 +0000645*Release date: 07-Dec-2007*
646
647(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000648
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000649Core and Builtins
650-----------------
651
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000652- str8 now has the same construction signature as bytes.
653
Georg Brandl52b92cc2008-05-25 09:43:03 +0000654- Comparisons between str and str8 now return False/True for ==/!=.
655 sqlite3 returns str8 when recreating on object from it's __conform__
656 value. The struct module returns str8 for all string-related
657 formats. This was true before this change, but becomes more
658 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000659
Georg Brandl52b92cc2008-05-25 09:43:03 +0000660- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
661 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000662
663- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
664
665- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000666 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000667 `PyUnicode_DecodeFSDefault(char*)` was added.
668
Georg Brandl52b92cc2008-05-25 09:43:03 +0000669- io.open() and _fileio.FileIO have grown a new argument closefd. A
670 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000671
Georg Brandl52b92cc2008-05-25 09:43:03 +0000672- Added a new option -b to issues warnings (-bb for errors) about
673 certain operations between bytes/buffer and str like str(b'') and
674 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000675
Georg Brandl52b92cc2008-05-25 09:43:03 +0000676- The standards streams sys.stdin, stdout and stderr may be None when
677 the when the C runtime library returns an invalid file descriptor
678 for the streams (fileno(stdin) < 0). For now this happens only for
679 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000680
Christian Heimesbce52be2007-11-17 19:08:41 +0000681- Added PCbuild9 directory for VS 2008.
682
Georg Brandl52b92cc2008-05-25 09:43:03 +0000683- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
684 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000685
Georg Brandl52b92cc2008-05-25 09:43:03 +0000686- Unbound methods are gone for good. ClassObject.method returns an
687 ordinary function object, instance.method still returns a bound
688 method object. The API of bound methods is cleaned up, too. The
689 im_class attribute is removed and im_func + im_self are renamed to
690 __func__ and __self__. The factory PyMethod_New takes only func and
691 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000692
Georg Brandl52b92cc2008-05-25 09:43:03 +0000693- intobject.h is no longer included by Python.h. The remains were
694 moved to longobject.h. It still exists to define several aliases
695 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000696
Christian Heimesa37d4c62007-12-04 23:02:19 +0000697- Removed sys.maxint, use sys.maxsize instead.
698
Fred Drake0e474a82007-10-11 18:01:43 +0000699Extension Modules
700-----------------
701
702- The `hotshot` profiler has been removed; use `cProfile` instead.
703
Brett Cannone9fd2312007-10-12 19:18:19 +0000704Library
705-------
706
Georg Brandl52b92cc2008-05-25 09:43:03 +0000707- When loading an external file using testfile(), the passed-in
708 encoding argument was being ignored if __loader__ is defined and
709 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000710
Georg Brandl52b92cc2008-05-25 09:43:03 +0000711- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
712 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000713
Christian Heimesc9543e42007-11-28 08:28:28 +0000714- Removed the 'new' module.
715
Georg Brandl52b92cc2008-05-25 09:43:03 +0000716- Removed all types from the 'types' module that are easily accessable
717 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000718
Georg Brandl52d168a2008-01-07 18:10:24 +0000719
Guido van Rossum4405cf32007-08-30 17:16:55 +0000720What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000721==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000722
Guido van Rossum4405cf32007-08-30 17:16:55 +0000723*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000724
725Core and Builtins
726-----------------
727
Martin v. Löwis47383402007-08-15 07:32:56 +0000728- PEP 3131: Support non-ASCII identifiers.
729
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000730- PEP 3120: Change default encoding to UTF-8.
731
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000732- PEP 3123: Use proper C inheritance for PyObject.
733
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000734- Removed the __oct__ and __hex__ special methods and added a bin()
735 builtin function.
736
Georg Brandl52b92cc2008-05-25 09:43:03 +0000737- PEP 3127: octal literals now start with "0o". Old-style octal
738 literals are invalid. There are binary literals with a prefix of
739 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000740
Guido van Rossume7ba4952007-06-06 23:52:48 +0000741- None, True, False are now keywords.
742
Guido van Rossum29478ef2007-05-29 00:39:44 +0000743- PEP 3119: isinstance() and issubclass() can be overridden.
744
Guido van Rossumebe3e162007-05-17 18:20:34 +0000745- Remove BaseException.message.
746
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000747- Remove tuple parameter unpacking (PEP 3113).
748
Georg Brandl52b92cc2008-05-25 09:43:03 +0000749- Remove the f_restricted attribute from frames. This naturally leads
750 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000751
Georg Brandl52b92cc2008-05-25 09:43:03 +0000752- PEP 3132 was accepted. That means that you can do ``a, *b =
753 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000754
Georg Brandl52b92cc2008-05-25 09:43:03 +0000755- range() now returns an iterator rather than a list. Floats are not
756 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000757
Nick Coghlan650f0d02007-04-15 12:05:43 +0000758- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000759 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000760
Guido van Rossume27dc722007-03-27 22:37:34 +0000761- By default, != returns the opposite of ==, unless the latter returns
762 NotImplemented.
763
Georg Brandl52b92cc2008-05-25 09:43:03 +0000764- Patch #1680961: sys.exitfunc has been removed and replaced with a
765 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000766
Georg Brandl801dd732007-03-18 20:18:31 +0000767- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000768 keyword arg in the class statement, which can now use the full
769 syntax of a parameter list. Also, the metaclass can implement a
770 __prepare__ function which will be called to create the dictionary
771 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000772
Georg Brandl428f0642007-03-18 18:35:15 +0000773- The long-deprecated argument "pend" of PyFloat_FromString() has been
774 removed.
775
Georg Brandle32b4222007-03-10 22:13:27 +0000776- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000777 its argument, if it exists. If not, it will work like before. This
778 allows customizing the output of dir() in the presence of a
779 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000780
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000781- Removed support for __members__ and __methods__.
782
Georg Brandle32b4222007-03-10 22:13:27 +0000783- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000784
Georg Brandle32b4222007-03-10 22:13:27 +0000785- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000786 functionality formerly known as raw_input(); the name raw_input() is
787 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000788
Georg Brandl52b92cc2008-05-25 09:43:03 +0000789- Classes listed in an 'except' clause must inherit from
790 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000791
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000792- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000793 and .keys(), .items(), .values() return dict views, which behave
794 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000795
Guido van Rossum8b545362007-02-09 23:52:14 +0000796- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000797 'softspace' attribute of files is now gone (since print() doesn't
798 use it). A side effect of this change is that you can get
799 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000800
801 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000802 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000803
804 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000805
Brett Cannon398db8b2007-01-29 23:44:37 +0000806- PEP 3102: keyword-only arguments.
807
Georg Brandl52b92cc2008-05-25 09:43:03 +0000808- Int/Long unification is complete. The 'long' built-in type and
809 literals with trailing 'L' or 'l' have been removed. Performance
810 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000811
812- 'except E, V' must now be spelled as 'except E as V' and deletes V
813 at the end of the except clause; V must be a simple name.
814
Neal Norwitzc1505362006-12-28 06:47:50 +0000815- Added function annotations per PEP 3107.
816
Georg Brandl52b92cc2008-05-25 09:43:03 +0000817- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000818
819 >>> def f(x):
820 ... def inc():
821 ... nonlocal x
822 ... x += 1
823 ... return x
824 ... return inc
825 ...
826 >>> inc = f(0)
827 >>> inc()
828 1
829 >>> inc()
830 2
831
Georg Brandl66a796e2006-12-19 20:50:34 +0000832- Moved intern() to sys.intern().
833
834- exec is now a function.
835
836- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000837
Neal Norwitz4886cc32006-08-21 17:06:07 +0000838- Classic classes are a thing of the past. All classes are new style.
839
840- Exceptions *must* derive from BaseException.
841
842- Integer division always returns a float. The -Q option is no more.
843 All the following are gone:
844 * PyNumber_Divide and PyNumber_InPlaceDivide
845 * __div__, __rdiv__, and __idiv__
846 * nb_divide, nb_inplace_divide
847 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
848 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
849 if we want to re-use __div__ and friends. If we do, it will make
850 it harder to write code for both 2.x and 3.x.)
851
852- 'as' and 'with' are keywords.
853
854- Absolute import is the default behavior for 'import foo' etc.
855
Georg Brandl52b92cc2008-05-25 09:43:03 +0000856- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000857
Georg Brandl52b92cc2008-05-25 09:43:03 +0000858- Removed these Python builtins: apply(), callable(), coerce(),
859 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000860
Georg Brandl52b92cc2008-05-25 09:43:03 +0000861- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000862
Georg Brandl52b92cc2008-05-25 09:43:03 +0000863- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000864
865- Remove C API support for restricted execution.
866
Guido van Rossumcf1be882007-08-30 22:07:17 +0000867- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000868 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000869 sequences of unequal length -- it now stops after the shortest one
870 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000871
Georg Brandl52b92cc2008-05-25 09:43:03 +0000872- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000873
874- Added class decorators per PEP 3129.
875
876
877Extension Modules
878-----------------
879
Georg Brandl52b92cc2008-05-25 09:43:03 +0000880- Removed the imageop module. Obsolete long with its unit tests
881 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000882
Georg Brandl52b92cc2008-05-25 09:43:03 +0000883- Removed these attributes from the operator module: div, idiv,
884 __div__, __idiv__, isCallable, sequenceIncludes.
885
886- Removed these attributes from the sys module: exc_clear(), exc_type,
887 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000888
889
890Library
891-------
892
Georg Brandl52b92cc2008-05-25 09:43:03 +0000893- Removed the compiler package. Use of the _ast module and (an
894 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000895
Georg Brandl52b92cc2008-05-25 09:43:03 +0000896- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
897 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
898 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000899
Georg Brandl52b92cc2008-05-25 09:43:03 +0000900- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000901
Georg Brandl52b92cc2008-05-25 09:43:03 +0000902- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
903 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
904 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000905
Georg Brandl52b92cc2008-05-25 09:43:03 +0000906- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000907
Georg Brandl52b92cc2008-05-25 09:43:03 +0000908- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000909 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000910
Georg Brandl52b92cc2008-05-25 09:43:03 +0000911- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000912
Georg Brandl52b92cc2008-05-25 09:43:03 +0000913- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000914
915- Patch #1680961: atexit has been reimplemented in C.
916
Walter Dörwald41980ca2007-08-16 21:55:45 +0000917- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
918
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000919Build
920-----
921
922C API
923-----
924
Georg Brandl52b92cc2008-05-25 09:43:03 +0000925- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000926
Georg Brandl52b92cc2008-05-25 09:43:03 +0000927- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
928 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000929
Georg Brandl52b92cc2008-05-25 09:43:03 +0000930- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000931
Georg Brandl52b92cc2008-05-25 09:43:03 +0000932- Removed these macros: staticforward, statichere, PyArg_GetInt,
933 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000934
Georg Brandl52b92cc2008-05-25 09:43:03 +0000935- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
936 intintobjargproc, getreadbufferproc, getwritebufferproc,
937 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000938
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000939Tests
940-----
941
Brett Cannone7a30f72008-03-03 03:36:27 +0000942- Removed test.testall as test.regrtest replaces it.
943
Brett Cannonced04e02005-02-13 22:53:22 +0000944Documentation
945-------------
946
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000947Mac
948---
949
Georg Brandl52b92cc2008-05-25 09:43:03 +0000950- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +0000951
Guido van Rossum845702c2007-08-30 18:44:53 +0000952Platforms
953---------
954
955- Support for BeOS and AtheOS was removed (according to PEP 11).
956
957- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
958
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000959Tools/Demos
960-----------
961
Georg Brandl52b92cc2008-05-25 09:43:03 +0000962
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000963**(For information about older versions, consult the HISTORY file.)**