blob: 366fc54ee95401d11d186602ba91114808232688 [file] [log] [blame]
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001+++++++++++
2Python News
3+++++++++++
4
Anthony Baxterb0c66302004-11-04 05:23:17 +00005(editors: check NEWS.help for information about editing NEWS using ReST.)
6
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
Brett Cannon54bd41d2008-09-02 04:01:42 +000015- Issue 3639: The _warnings module could segfault the interpreter when
16 unexpected types were passed in as arguments.
17
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +000018- Issue #3712: The memoryview object had a reference leak and didn't support
19 cyclic garbage collection.
20
Antoine Pitrouf71995782008-08-29 18:37:05 +000021- Issue #3668: Fix a memory leak with the "s*" argument parser in
22 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
23 was correctly parsed but parsing of subsequent arguments failed.
24
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +000025- Issue #3611: An exception __context__ could be cleared in a complex pattern
26 involving a __del__ method re-raising an exception.
27
Antoine Pitrouec569b72008-08-26 22:40:48 +000028- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
29 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
30 mechanism. In the process, fix a bug where isinstance() and issubclass(),
31 when given a tuple of classes as second argument, were looking up
32 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
33 type object.
34
Antoine Pitroue2dffc02008-08-26 22:02:58 +000035- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
36
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +000037- Issue #3651: Fix various memory leaks when using the buffer
38 interface, or when the "s#" code of PyArg_ParseTuple is given a
39 bytes object.
40
Neal Norwitz6ae2eb22008-08-24 23:50:08 +000041- Issue #3657: Fix uninitialized memory read when pickling longs.
42 Found by valgrind.
43
Neal Norwitz3ce5d922008-08-24 07:08:55 +000044- Apply security patches from Apple.
45
Neal Norwitz2f99b242008-08-24 05:48:10 +000046- Fix crashes on memory allocation failure found with failmalloc.
47
48- Fix memory leaks found with valgrind and update suppressions file.
49
50- Fix compiler warnings in opt mode which would lead to invalid memory reads.
51
52- Fix problem using wrong name in decimal module reported by pychecker.
53
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000054- Issue #3650: Fixed a reference leak in bytes.split('x').
55
Benjamin Petersonc15a0732008-08-26 16:46:47 +000056- bytes(o) now tries to use o.__bytes__() before using fallbacks.
57
58C API
59-----
60
61- PyObject_Bytes and PyBytes_FromObject were added.
62
Barry Warsaw8509df72008-08-21 03:02:47 +000063Library
64-------
65
Brett Cannonec92e182008-09-02 02:46:59 +000066- Issue 3602: As part of the merge of r66135, make the parameters on
67 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
68
Benjamin Petersonb3085c92008-09-01 23:09:31 +000069- The deprecation warnings for the camelCase threading API names were removed.
70
Benjamin Peterson6784eb72008-08-23 20:32:27 +000071Extension Modules
72-----------------
73
74- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
75 exploitation of poor argument checking.
76
Jesus Cea6ba33292008-08-31 14:12:11 +000077- bsddb code updated to version 4.7.3pre2. This code is the same than
78 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
79 The Python code is automatically translated using "2to3". Please, do not
80 update this code in Python 3.0 by hand. Update the 2.6 one and then
81 do "2to3".
82
Neal Norwitz8f2f22a2008-08-24 20:59:23 +000083Tools/Demos
84-----------
85
86- Fix Misc/gdbinit so it works.
87
Barry Warsaw8509df72008-08-21 03:02:47 +000088
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000089What's new in Python 3.0b3?
90===========================
91
Barry Warsaw57c10582008-08-21 02:39:51 +000092*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000093
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000094Core and Builtins
95-----------------
96
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +000097- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
98 arguments.
99
Antoine Pitrou616d2852008-08-19 22:09:34 +0000100- Issue #2394: implement more of the memoryview API, with the caveat that
101 only one-dimensional contiguous buffers are supported and exercised right
102 now. Slicing, slice assignment and comparison (equality and inequality)
103 have been added. Also, the tolist() method has been implemented, but only
104 for byte buffers. Endly, the API has been updated to return bytes objects
105 wherever it used to return bytearrays.
106
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000107- Issue #3560: clean up the new C PyMemoryView API so that naming is
108 internally consistent; add macros PyMemoryView_GET_BASE() and
109 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
110 without relying on a particular implementation; remove the ill-named
111 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
112
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000113- ctypes function pointers that are COM methods have a boolean True
114 value again.
115
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000116- Issue #1819: function calls with several named parameters are now on
117 average 35% faster (as measured by pybench).
118
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000119- The undocumented C APIs PyUnicode_AsString() and
120 PyUnicode_AsStringAndSize() were made private to the interpreter, in
121 order to be able to refine their interfaces for Python 3.1.
122
123 If you need to access the UTF-8 representation of a Unicode object
124 as bytes string, please use PyUnicode_AsUTF8String() instead.
125
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000126- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
127 to Python 3.0's stricter semantics which allow to avoid successive
128 reallocations of the result string (this also affects str.join()).
129
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000130
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000131Library
132-------
133
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000134- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
135 a build problem on MacOS with CJK locales. It adds four temporary
136 mappings to existing legacy codecs that are virtually compatible
137 with Mac encodings. They will be replaced by codecs correctly
138 implemented in 3.1.
139
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000140- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
141 "global name 'header' is not defined".
142
Antoine Pitroufd036452008-08-19 17:56:33 +0000143- Issue #2834: update the regular expression library to match the unicode
144 standards of py3k. In other words, mixing bytes and unicode strings
145 (be it as pattern, search string or replacement string) raises a TypeError.
146 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
147 and can be disabled by specifying a new re.ASCII flag; as for bytes
148 patterns, ASCII matching is the only option and trying to specify re.UNICODE
149 for such patterns raises a ValueError.
150
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000151- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
152 Code contributed by Matt Giuca. quote() now encodes the input
153 before quoting, unquote() decodes after unquoting. There are
154 new arguments to change the encoding and errors settings.
155 There are also new APIs to skip the encode/decode steps.
156 [un]quote_plus() are also affected.
157
Nick Coghlan36f49522008-08-18 12:31:52 +0000158- Issue #2235: numbers.Number now blocks inheritance of the default id()
159 based hash because that hash mechanism is not correct for numeric types.
160 All concrete numeric types that inherit from Number (rather than just
161 registering with it) must explicitly provide a hash implementation in
162 order for their instances to be hashable.
163
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000164- Issue #2676: in the email package, content-type parsing was hanging on
165 pathological input because of quadratic or exponential behaviour of a
166 regular expression.
167
Antoine Pitrou87695762008-08-14 22:44:29 +0000168- Issue #3476: binary buffered reading through the new "io" library is now
169 thread-safe.
170
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000171- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
172 menu entries were not deleted.
173
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000174- Remove the TarFileCompat class from tarfile.py.
175
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000176- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
177 accepts the same parameters. It just checks that its first argument is an
178 integer.
179
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000180- Issue #3394: zipfile.writestr sets external attributes when passed a
181 file name rather than a ZipInfo instance, so files are extracted with
182 mode 0600 rather than 000 under Unix.
183
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000184- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
185 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000186
Martin v. Löwis371bb502008-08-16 13:02:57 +0000187Extension Modules
188-----------------
189
190- Bug #3542: Support Unicode strings in _msi module.
191
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000192What's new in Python 3.0b2?
193===========================
194
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000195*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000196
197Core and Builtins
198-----------------
199
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000200- Issue #3008: the float type has a new instance method 'float.hex'
201 and a new class method 'float.fromhex' to convert floating-point
202 numbers to and from hexadecimal strings, respectively.
203
Eric Smithd68af8f2008-07-16 00:15:35 +0000204- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
205 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
206
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000207- Issue #3280: like chr(), the "%c" format now accepts unicode code points
208 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
209 "narrow Unicode" builds, the result is a string of 2 code units, forming a
210 UTF-16 surrogate pair.
211
Georg Brandld52429f2008-07-04 15:55:02 +0000212- Issue #3282: str.isprintable() should return False for undefined
213 Unicode characters.
214
Martin v. Löwis029656f2008-06-30 04:06:08 +0000215- Issue #3236: Return small longs from PyLong_FromString.
216
Benjamin Petersone6528212008-07-15 15:32:09 +0000217- Exception tracebacks now support exception chaining.
218
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000219Library
220-------
221
Brett Cannonc2542e92008-07-25 18:19:20 +0000222- Removed the sunaudio module. Use sunau instead.
223
Thomas Heller47bc8092008-08-19 06:38:12 +0000224- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
225 api functions without holding the GIL, which could lead to a fatal
226 error when they failed.
227
228- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
229
Georg Brandl30704ea02008-07-23 15:07:12 +0000230- Removed "ast" function aliases from the parser module.
231
Thomas Heller15383a02008-07-15 19:46:52 +0000232- Issue #3313: Fixed a crash when a failed dlopen() call does not set
233 a valid dlerror() message.
234
Thomas Heller0261e1e2008-07-15 17:25:07 +0000235- Issue #3258: Fixed a crash when a ctypes POINTER type to an
236 incomplete structure was created.
237
Georg Brandl1abcbf82008-07-01 19:28:43 +0000238- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
239 argument now must be a bytes object in any case.
240
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000241- Issue #3145: help("modules whatever") failed when trying to load the source
242 code of every single module of the standard library, including invalid files
243 used in the test suite.
244
Georg Brandlbded4d32008-07-17 18:15:35 +0000245- The gettext library now consistently uses Unicode strings for message ids
246 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000247
Benjamin Petersone6528212008-07-15 15:32:09 +0000248- The traceback module has been expanded to handle chained exceptions.
249
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000250C API
251-----
252
253- Issue #3247: the function Py_FindMethod was removed. Modern types should
254 use the tp_methods slot instead.
255
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000256Tools/Demos
257-----------
258
Georg Brandl336341f2008-07-01 20:21:28 +0000259- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000260
Georg Brandl336341f2008-07-01 20:21:28 +0000261- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000262
263
Brett Cannon0d71ee72008-05-08 18:13:40 +0000264What's new in Python 3.0b1?
265===========================
266
Barry Warsawc1e689e2008-06-19 00:35:43 +0000267*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000268
269Core and Builtins
270-----------------
271
Brett Cannondb734912008-06-27 00:52:15 +0000272- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
273 argument being anything other than a dict or None. Also fixed a bug in error
274 handling when 'message' and 'category' were both set to None, triggering a
275 bus error.
276
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000277- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
278 holds the last (strong) reference to its referent.
279
Georg Brandl559e5d72008-06-11 18:37:52 +0000280- Issue #2630: implement PEP 3138. repr() now returns printable
281 Unicode characters unescaped, to get an ASCII-only representation
282 of an object use ascii().
283
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000284- Issue #1342: On windows, Python could not start when installed in a
285 directory with non-ascii characters.
286
Martin v. Löwis1a214512008-06-11 05:26:20 +0000287- Implement PEP 3121: new module initialization and finalization API.
288
Georg Brandle1b5ac62008-06-04 13:06:58 +0000289- Removed the already-defunct ``-t`` option.
290
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000291- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
292 unmarshalling many code objects, which happens when importing a
293 large .pyc file (~1000 functions).
294
Georg Brandl52b92cc2008-05-25 09:43:03 +0000295- Issue #2963: fix merging oversight that disabled method cache for
296 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000297
Georg Brandlc9b09532008-05-25 09:24:38 +0000298- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
299
Georg Brandl52b92cc2008-05-25 09:43:03 +0000300- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000301
Georg Brandl52b92cc2008-05-25 09:43:03 +0000302- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
303 code now allows any unicode string and returns a utf-8 encoded
304 buffer, just like the "s#" code already does. The "z" code was
305 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000306
Georg Brandl52b92cc2008-05-25 09:43:03 +0000307- Issue #2863: generators now have a ``gen.__name__`` attribute that
308 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
309 ``func.func_code.co_name``. The repr() of a generator now also
310 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000311
312- Issue #2831: enumerate() now has a ``start`` argument.
313
Georg Brandl52b92cc2008-05-25 09:43:03 +0000314- Issue #2801: fix bug in the float.is_integer method where a
315 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000316
Georg Brandl52b92cc2008-05-25 09:43:03 +0000317- The ``--with-toolbox-glue`` option (and the associated
318 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000319
Georg Brandl52b92cc2008-05-25 09:43:03 +0000320- Issue #2196: hasattr() now lets exceptions which do not inherit
321 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
322 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000323
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000324- #3021 Exception reraising sematics have been significantly improved. However,
325 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
326 code anymore.
327
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000328- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
329 removed.
330
Brett Cannon0d71ee72008-05-08 18:13:40 +0000331Extension Modules
332-----------------
333
Georg Brandl38feaf02008-05-25 07:45:51 +0000334- Renamed ``_winreg`` module to ``winreg``.
335
Georg Brandl52b92cc2008-05-25 09:43:03 +0000336- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
337 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000338
339- Support for Windows 9x has been removed from the winsound module.
340
Georg Brandl52b92cc2008-05-25 09:43:03 +0000341- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000342
Brett Cannon0d71ee72008-05-08 18:13:40 +0000343Library
344-------
345
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000346- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
347 symtable.Symbol have been removed.
348
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000349- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
350
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000351- a new ``urllib`` package was created. It consists of code from
352 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
353 modules have all been removed. The new package has five submodules:
354 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
355 ``urllib.error``, and ``urllib.robotparser``. The
356 ``urllib.request.urlopen()`` function uses the url opener from
357 ``urllib2``. (Note that the unittests have not been renamed for the
358 beta, but they will be renamed in the future.)
359
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000360- rfc822 has been removed in favor of the email package.
361
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000362- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000363
Barry Warsawf5019422008-06-12 02:42:00 +0000364- Patch #2849: Remove use of rfc822 module from standard library.
365
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000366- Added C optimized implementation of io.StringIO.
367
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000368- The ``pickle`` module is now automatically use an optimized C
369 implementation of Pickler and Unpickler when available. The
370 ``cPickle`` module is no longer needed.
371
Georg Brandl877b10a2008-06-01 21:25:55 +0000372- Removed the ``htmllib`` and ``sgmllib`` modules.
373
Georg Brandl61013952008-05-28 15:56:30 +0000374- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
375 been removed from ``http.cookies``.
376
Brett Cannona23810f2008-05-26 19:04:21 +0000377- The ``commands`` module has been removed. Its getoutput() and
378 getstatusoutput() functions have been moved to the ``subprocess`` module.
379
Georg Brandl3d5c4252008-05-26 18:03:26 +0000380- The ``http`` package was created; it contains the old ``httplib``
381 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
382 as ``http.cookiejar``, and the content of the three ``HTTPServer``
383 modules as ``http.server``.
384
Georg Brandl38eceaa2008-05-26 11:14:17 +0000385- The ``xmlrpc`` package was created; it contains the old
386 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
387 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000388 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000389
390- The ``dbm`` package was created, containing the old modules
391 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
392 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
393 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
394 as submodules.
395
Georg Brandl52b92cc2008-05-25 09:43:03 +0000396- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000397
Georg Brandl52b92cc2008-05-25 09:43:03 +0000398- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000399
Georg Brandl52b92cc2008-05-25 09:43:03 +0000400- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000401
Georg Brandl52b92cc2008-05-25 09:43:03 +0000402- Issue #2250: Exceptions raised during evaluation of names in
403 rlcompleter's ``Completer.complete()`` method are now caught and
404 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000405
Georg Brandl52b92cc2008-05-25 09:43:03 +0000406- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
407 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000408
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000409- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
410 large to fit in a C long. ldexp(x, n) now returns a zero (with
411 suitable sign) if n is large and negative; previously, it raised
412 OverflowError.
413
Georg Brandl52b92cc2008-05-25 09:43:03 +0000414- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000415
Georg Brandl52b92cc2008-05-25 09:43:03 +0000416- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000417
Georg Brandl52b92cc2008-05-25 09:43:03 +0000418- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000419
Georg Brandl52b92cc2008-05-25 09:43:03 +0000420- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000421
Georg Brandl52b92cc2008-05-25 09:43:03 +0000422- Fixed the ``__all__`` setting on ``collections`` to include
423 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000424
Brett Cannoncf3520c2008-05-11 22:47:58 +0000425- The sre module has been removed.
426
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000427- The Queue module has been renamed to queue.
428
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000429- The copy_reg module has been renamed to copyreg.
430
Brett Cannond8b61ee2008-05-11 03:00:26 +0000431- The mhlib module has been removed.
432
Brett Cannonbd474422008-05-10 22:42:14 +0000433- The ihooks module has been removed.
434
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000435- The fpformat module has been removed.
436
Brett Cannonf4fd9932008-05-10 21:11:46 +0000437- The dircache module has been removed.
438
Brett Cannond175b4c2008-05-10 03:19:54 +0000439- The Canvas module has been removed.
440
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000441- The Decimal module gained the magic methods __round__, __ceil__,
442 __floor__ and __trunc__, to give support for round, math.ceil,
443 math.floor and math.trunc.
444
Brett Cannon900ee3a2008-05-08 20:31:11 +0000445- The user module has been removed.
446
Brett Cannon34afe872008-05-08 20:31:44 +0000447- The mutex module has been removed.
448
Brett Cannon0d71ee72008-05-08 18:13:40 +0000449- The imputil module has been removed.
450
Georg Brandl52b92cc2008-05-25 09:43:03 +0000451- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000452
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000453- pdb gained the "until" command.
454
Georg Brandl52b92cc2008-05-25 09:43:03 +0000455- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000456
Georg Brandl32de7af2008-08-18 23:07:41 +0000457- The threading module API was renamed to be PEP 8 compliant. The
458 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000459
Georg Brandl294d5a92008-06-01 19:25:32 +0000460Tools/Demos
461-----------
462
463- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000464
Brett Cannon0d71ee72008-05-08 18:13:40 +0000465Build
466-----
467
468
Barry Warsaw66079cd2008-04-04 01:36:36 +0000469What's New in Python 3.0a5?
470===========================
471
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000472*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000473
474Core and Builtins
475-----------------
476
Georg Brandl52b92cc2008-05-25 09:43:03 +0000477- Fixed misbehaviour of PyLong_FromSsize_t on systems where
478 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000479
Georg Brandl52b92cc2008-05-25 09:43:03 +0000480- Issue #2221: Corrected a SystemError "error return without exception
481 set", when the code executed by exec() raises an exception, and
482 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000483
Georg Brandl52b92cc2008-05-25 09:43:03 +0000484- Bug #2565: The repr() of type objects now calls them 'class', not
485 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000486
Martin v. Löwis790465f2008-04-05 20:41:37 +0000487- The command line processing was converted to pass Unicode strings
488 through as unmodified as possible; as a consequence, the C API
489 related to command line arguments was changed to use wchar_t.
490
Georg Brandl52b92cc2008-05-25 09:43:03 +0000491- All backslashes in raw strings are interpreted literally. This
492 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000493
Barry Warsaw66079cd2008-04-04 01:36:36 +0000494Extension Modules
495-----------------
496
497Library
498-------
499
Georg Brandl52b92cc2008-05-25 09:43:03 +0000500- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000501
Thomas Hellere106dc32008-04-24 18:39:36 +0000502- Issue #2682: ctypes callback functions now longer contain a cyclic
503 reference to themselves.
504
Georg Brandl52b92cc2008-05-25 09:43:03 +0000505- Issue #2058: Remove the buf attribute and add __slots__ to the
506 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000507
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000508- Bug #2606: Avoid calling .sort() on a dict_keys object.
509
Thomas Hellerbff533b2008-04-04 19:53:14 +0000510- The bundled libffi copy is now in sync with the recently released
511 libffi3.0.5 version, apart from some small changes to
512 Modules/_ctypes/libffi/configure.ac.
513
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000514Build
515-----
516
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000517- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
518
Guido van Rossumdc21db32008-04-07 18:37:41 +0000519- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000520 accidentally overwriting a Python 2.x installation. Use "make
521 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000522
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000523- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
524 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000525
Georg Brandl52b92cc2008-05-25 09:43:03 +0000526
Barry Warsawa9d499d2008-03-01 18:38:07 +0000527What's New in Python 3.0a4?
528===========================
529
Barry Warsawbb5cd082008-04-02 23:33:27 +0000530*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000531
Martin v. Löwis25931462008-03-17 20:43:42 +0000532Core and Builtins
533-----------------
534
535- Bug #2301: Don't try decoding the source code into the original
536 encoding for syntax errors.
537
Martin v. Löwis92fab752008-03-08 10:40:41 +0000538Extension Modules
539-----------------
540
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000541- The dl module was removed, use the ctypes module instead.
542
Martin v. Löwis92fab752008-03-08 10:40:41 +0000543- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000544
Martin v. Löwis071ef772008-03-08 11:24:24 +0000545Library
546-------
547
Georg Brandl52b92cc2008-05-25 09:43:03 +0000548- The class distutils.commands.build_py.build_py_2to3 can be used as a
549 build_py replacement to automatically run 2to3 on modules that are
550 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000551
Guido van Rossumf4169812008-03-17 22:56:06 +0000552- A new pickle protocol (protocol 3) is added with explicit support
553 for bytes. This is the default protocol. It intentionally cannot
554 be unpickled by Python 2.x.
555
556- When a pickle written by Python 2.x contains an (8-bit) str
557 instance, this is now decoded to a (Unicode) str instance. The
558 encoding used to do this defaults to ASCII, but can be overridden
559 via two new keyword arguments to the Unpickler class. Previously
560 this would create bytes instances, which is usually wrong: str
561 instances are often used to pickle attribute names etc., and text is
562 more common than binary data anyway.
563
Martin v. Löwis071ef772008-03-08 11:24:24 +0000564- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000565 system doesn't support CODESET and LANG isn't set or doesn't allow
566 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000567
Georg Brandl52b92cc2008-05-25 09:43:03 +0000568- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
569 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000570
Georg Brandl52b92cc2008-05-25 09:43:03 +0000571- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
572 has been renamed tokenize and now works with bytes rather than
573 strings. A new detect_encoding function has been added for
574 determining source file encoding according to PEP-0263. Token
575 sequences returned by tokenize always start with an ENCODING token
576 which specifies the encoding used to decode the file. This token is
577 used to encode the output of untokenize back to bytes.
578
Barry Warsawa9d499d2008-03-01 18:38:07 +0000579
Christian Heimesbc873412007-12-08 22:11:32 +0000580What's New in Python 3.0a3?
581===========================
582
Barry Warsaw659fc422008-03-01 17:45:23 +0000583*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000584
585Core and Builtins
586-----------------
587
Georg Brandl52b92cc2008-05-25 09:43:03 +0000588- Issue #2282: io.TextIOWrapper was not overriding seekable() from
589 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000590
Georg Brandl52b92cc2008-05-25 09:43:03 +0000591- Issue #2115: Important speedup in setting __slot__ attributes. Also
592 prevent a possible crash: an Abstract Base Class would try to access
593 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000594
Georg Brandl52b92cc2008-05-25 09:43:03 +0000595- Fixed repr() and str() of complex numbers with infinity or nan as
596 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000597
Georg Brandl52b92cc2008-05-25 09:43:03 +0000598- Clear all free list during a gc.collect() of the highest generation
599 in order to allow pymalloc to free more arenas. Python may give back
600 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000601
Georg Brandl52b92cc2008-05-25 09:43:03 +0000602- Issue #2045: Fix an infinite recursion triggered when printing a
603 subclass of collections.defaultdict, if its default_factory is set
604 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000605
606- Fixed a minor memory leak in dictobject.c. The content of the free
607 list was not freed on interpreter shutdown.
608
Georg Brandl52b92cc2008-05-25 09:43:03 +0000609- Limit free list of method and builtin function objects to 256
610 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000611
Georg Brandl52b92cc2008-05-25 09:43:03 +0000612- Patch #1953: Added ``sys._compact_freelists()`` and the C API
613 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000614 to compact the internal free lists of pre-allocted ints and floats.
615
616- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000617 Python expected the return type int but the fork familie returns
618 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000619
Georg Brandl52b92cc2008-05-25 09:43:03 +0000620- Issue #1678380: Fix a bug that identifies 0j and -0j when they
621 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000622
Georg Brandl52b92cc2008-05-25 09:43:03 +0000623- Issue #2025: Added tuple.count() and tuple.index() methods to comply
624 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000625
Georg Brandl52b92cc2008-05-25 09:43:03 +0000626- Fixed multiple reinitialization of the Python interpreter. The small
627 int list in longobject.c has caused a seg fault during the third
628 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000629
Georg Brandl52b92cc2008-05-25 09:43:03 +0000630- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000631
Georg Brandl52b92cc2008-05-25 09:43:03 +0000632- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000633
Georg Brandl52b92cc2008-05-25 09:43:03 +0000634- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000635
Georg Brandl52b92cc2008-05-25 09:43:03 +0000636- map() no longer accepts None for the first argument. Use zip()
637 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000638
Facundo Batista2336bdd2008-01-19 19:12:01 +0000639- Issue #1769: Now int("- 1") is not allowed any more.
640
Georg Brandl52b92cc2008-05-25 09:43:03 +0000641- Object/longobject.c: long(float('nan')) raises an OverflowError
642 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000643
Georg Brandl52b92cc2008-05-25 09:43:03 +0000644- Issue #1762972: __file__ points to the source file instead of the
645 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000646
Guido van Rossumab078dd2008-01-06 00:09:11 +0000647- Issue #1393: object_richcompare() returns NotImplemented instead of
648 False if the objects aren't equal, to give the other side a chance.
649
Guido van Rossume239b002008-01-06 00:44:20 +0000650- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000651
Georg Brandl52b92cc2008-05-25 09:43:03 +0000652- Improve some exception messages when Windows fails to load an
653 extension module. Now we get for example '%1 is not a valid Win32
654 application' instead of 'error code 193'. Also use Unicode strings
655 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000656
Georg Brandl52b92cc2008-05-25 09:43:03 +0000657- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
658 Python C API has gained a new type *PyInstanceMethod_Type* and the
659 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
660 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000661
Georg Brandl52b92cc2008-05-25 09:43:03 +0000662- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
663 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
664 are now enough to print the corresponding list of objects considered
665 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000666
Georg Brandl52b92cc2008-05-25 09:43:03 +0000667- Issue #1573: Improper use of the keyword-only syntax makes the
668 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000669
Georg Brandl52b92cc2008-05-25 09:43:03 +0000670- Issue #1564: The set implementation should special-case PyUnicode
671 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000672
Guido van Rossumea6775b2008-02-21 20:16:31 +0000673- Patch #1031213: Decode source line in SyntaxErrors back to its
674 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000675
Christian Heimes09aaa882008-02-23 15:01:06 +0000676- inspect.getsource() includes the decorators again.
677
Guido van Rossumea6775b2008-02-21 20:16:31 +0000678- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
679 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000680
Georg Brandl52b92cc2008-05-25 09:43:03 +0000681- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
682 the first chunk fed to the decoder started with a BOM, but was
683 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000684
Christian Heimesbc873412007-12-08 22:11:32 +0000685Extension Modules
686-----------------
687
Georg Brandl52b92cc2008-05-25 09:43:03 +0000688- Code for itertools ifilter(), imap(), and izip() moved to bultins
689 and renamed to filter(), map(), and zip(). Also, renamed
690 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000691
Georg Brandl52b92cc2008-05-25 09:43:03 +0000692- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000693
Georg Brandl52b92cc2008-05-25 09:43:03 +0000694- Bug #2111: mmap segfaults when trying to write a block opened with
695 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000696
Georg Brandl52b92cc2008-05-25 09:43:03 +0000697- Issue #2063: correct order of utime and stime in os.times() result
698 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000699
Christian Heimesbc873412007-12-08 22:11:32 +0000700Library
701-------
702
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000703- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000704
Georg Brandl52b92cc2008-05-25 09:43:03 +0000705- Created new UserDict class in collections module. This one inherits
706 from and complies with the MutableMapping ABC. Also, moved
707 UserString and UserList to the collections module. The
708 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000709
Guido van Rossumea6775b2008-02-21 20:16:31 +0000710- Removed UserDict.DictMixin. Replaced all its uses with
711 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000712
Guido van Rossume239b002008-01-06 00:44:20 +0000713- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000714
Guido van Rossume239b002008-01-06 00:44:20 +0000715- Issue #1585: IDLE uses non-existent xrange() function.
716
717- Issue #1578: Problems in win_getpass.
718
Georg Brandl52d168a2008-01-07 18:10:24 +0000719Build
720-----
721
Georg Brandl52b92cc2008-05-25 09:43:03 +0000722- Renamed --enable-unicode configure flag to --with-wide-unicode,
723 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000724
Guido van Rossume239b002008-01-06 00:44:20 +0000725C API
726-----
727
728- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
729 Py_TYPE and Py_REFCNT.
730
Georg Brandl52b92cc2008-05-25 09:43:03 +0000731- New API PyImport_ImportModuleNoBlock(), works like
732 PyImport_ImportModule() but won't block on the import lock
733 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000734
Christian Heimesbc873412007-12-08 22:11:32 +0000735
Fred Drake0e474a82007-10-11 18:01:43 +0000736What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000737===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000738
Guido van Rossum99533a92007-12-06 05:07:41 +0000739*Release date: 07-Dec-2007*
740
741(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000742
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000743Core and Builtins
744-----------------
745
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000746- str8 now has the same construction signature as bytes.
747
Georg Brandl52b92cc2008-05-25 09:43:03 +0000748- Comparisons between str and str8 now return False/True for ==/!=.
749 sqlite3 returns str8 when recreating on object from it's __conform__
750 value. The struct module returns str8 for all string-related
751 formats. This was true before this change, but becomes more
752 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000753
Georg Brandl52b92cc2008-05-25 09:43:03 +0000754- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
755 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000756
757- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
758
759- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000760 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000761 `PyUnicode_DecodeFSDefault(char*)` was added.
762
Georg Brandl52b92cc2008-05-25 09:43:03 +0000763- io.open() and _fileio.FileIO have grown a new argument closefd. A
764 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000765
Georg Brandl52b92cc2008-05-25 09:43:03 +0000766- Added a new option -b to issues warnings (-bb for errors) about
767 certain operations between bytes/buffer and str like str(b'') and
768 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000769
Georg Brandl52b92cc2008-05-25 09:43:03 +0000770- The standards streams sys.stdin, stdout and stderr may be None when
771 the when the C runtime library returns an invalid file descriptor
772 for the streams (fileno(stdin) < 0). For now this happens only for
773 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000774
Christian Heimesbce52be2007-11-17 19:08:41 +0000775- Added PCbuild9 directory for VS 2008.
776
Georg Brandl52b92cc2008-05-25 09:43:03 +0000777- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
778 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000779
Georg Brandl52b92cc2008-05-25 09:43:03 +0000780- Unbound methods are gone for good. ClassObject.method returns an
781 ordinary function object, instance.method still returns a bound
782 method object. The API of bound methods is cleaned up, too. The
783 im_class attribute is removed and im_func + im_self are renamed to
784 __func__ and __self__. The factory PyMethod_New takes only func and
785 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000786
Georg Brandl52b92cc2008-05-25 09:43:03 +0000787- intobject.h is no longer included by Python.h. The remains were
788 moved to longobject.h. It still exists to define several aliases
789 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000790
Christian Heimesa37d4c62007-12-04 23:02:19 +0000791- Removed sys.maxint, use sys.maxsize instead.
792
Fred Drake0e474a82007-10-11 18:01:43 +0000793Extension Modules
794-----------------
795
796- The `hotshot` profiler has been removed; use `cProfile` instead.
797
Brett Cannone9fd2312007-10-12 19:18:19 +0000798Library
799-------
800
Georg Brandl52b92cc2008-05-25 09:43:03 +0000801- When loading an external file using testfile(), the passed-in
802 encoding argument was being ignored if __loader__ is defined and
803 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000804
Georg Brandl52b92cc2008-05-25 09:43:03 +0000805- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
806 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000807
Christian Heimesc9543e42007-11-28 08:28:28 +0000808- Removed the 'new' module.
809
Georg Brandl52b92cc2008-05-25 09:43:03 +0000810- Removed all types from the 'types' module that are easily accessable
811 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000812
Georg Brandl52d168a2008-01-07 18:10:24 +0000813
Guido van Rossum4405cf32007-08-30 17:16:55 +0000814What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000815==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000816
Guido van Rossum4405cf32007-08-30 17:16:55 +0000817*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000818
819Core and Builtins
820-----------------
821
Martin v. Löwis47383402007-08-15 07:32:56 +0000822- PEP 3131: Support non-ASCII identifiers.
823
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000824- PEP 3120: Change default encoding to UTF-8.
825
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000826- PEP 3123: Use proper C inheritance for PyObject.
827
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000828- Removed the __oct__ and __hex__ special methods and added a bin()
829 builtin function.
830
Georg Brandl52b92cc2008-05-25 09:43:03 +0000831- PEP 3127: octal literals now start with "0o". Old-style octal
832 literals are invalid. There are binary literals with a prefix of
833 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000834
Guido van Rossume7ba4952007-06-06 23:52:48 +0000835- None, True, False are now keywords.
836
Guido van Rossum29478ef2007-05-29 00:39:44 +0000837- PEP 3119: isinstance() and issubclass() can be overridden.
838
Guido van Rossumebe3e162007-05-17 18:20:34 +0000839- Remove BaseException.message.
840
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000841- Remove tuple parameter unpacking (PEP 3113).
842
Georg Brandl52b92cc2008-05-25 09:43:03 +0000843- Remove the f_restricted attribute from frames. This naturally leads
844 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000845
Georg Brandl52b92cc2008-05-25 09:43:03 +0000846- PEP 3132 was accepted. That means that you can do ``a, *b =
847 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000848
Georg Brandl52b92cc2008-05-25 09:43:03 +0000849- range() now returns an iterator rather than a list. Floats are not
850 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000851
Nick Coghlan650f0d02007-04-15 12:05:43 +0000852- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000853 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000854
Guido van Rossume27dc722007-03-27 22:37:34 +0000855- By default, != returns the opposite of ==, unless the latter returns
856 NotImplemented.
857
Georg Brandl52b92cc2008-05-25 09:43:03 +0000858- Patch #1680961: sys.exitfunc has been removed and replaced with a
859 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000860
Georg Brandl801dd732007-03-18 20:18:31 +0000861- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000862 keyword arg in the class statement, which can now use the full
863 syntax of a parameter list. Also, the metaclass can implement a
864 __prepare__ function which will be called to create the dictionary
865 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000866
Georg Brandl428f0642007-03-18 18:35:15 +0000867- The long-deprecated argument "pend" of PyFloat_FromString() has been
868 removed.
869
Georg Brandle32b4222007-03-10 22:13:27 +0000870- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000871 its argument, if it exists. If not, it will work like before. This
872 allows customizing the output of dir() in the presence of a
873 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000874
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000875- Removed support for __members__ and __methods__.
876
Georg Brandle32b4222007-03-10 22:13:27 +0000877- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000878
Georg Brandle32b4222007-03-10 22:13:27 +0000879- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000880 functionality formerly known as raw_input(); the name raw_input() is
881 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000882
Georg Brandl52b92cc2008-05-25 09:43:03 +0000883- Classes listed in an 'except' clause must inherit from
884 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000885
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000886- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000887 and .keys(), .items(), .values() return dict views, which behave
888 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000889
Guido van Rossum8b545362007-02-09 23:52:14 +0000890- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000891 'softspace' attribute of files is now gone (since print() doesn't
892 use it). A side effect of this change is that you can get
893 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000894
895 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000896 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000897
898 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000899
Brett Cannon398db8b2007-01-29 23:44:37 +0000900- PEP 3102: keyword-only arguments.
901
Georg Brandl52b92cc2008-05-25 09:43:03 +0000902- Int/Long unification is complete. The 'long' built-in type and
903 literals with trailing 'L' or 'l' have been removed. Performance
904 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000905
906- 'except E, V' must now be spelled as 'except E as V' and deletes V
907 at the end of the except clause; V must be a simple name.
908
Neal Norwitzc1505362006-12-28 06:47:50 +0000909- Added function annotations per PEP 3107.
910
Georg Brandl52b92cc2008-05-25 09:43:03 +0000911- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000912
913 >>> def f(x):
914 ... def inc():
915 ... nonlocal x
916 ... x += 1
917 ... return x
918 ... return inc
919 ...
920 >>> inc = f(0)
921 >>> inc()
922 1
923 >>> inc()
924 2
925
Georg Brandl66a796e2006-12-19 20:50:34 +0000926- Moved intern() to sys.intern().
927
928- exec is now a function.
929
930- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000931
Neal Norwitz4886cc32006-08-21 17:06:07 +0000932- Classic classes are a thing of the past. All classes are new style.
933
934- Exceptions *must* derive from BaseException.
935
936- Integer division always returns a float. The -Q option is no more.
937 All the following are gone:
938 * PyNumber_Divide and PyNumber_InPlaceDivide
939 * __div__, __rdiv__, and __idiv__
940 * nb_divide, nb_inplace_divide
941 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
942 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
943 if we want to re-use __div__ and friends. If we do, it will make
944 it harder to write code for both 2.x and 3.x.)
945
946- 'as' and 'with' are keywords.
947
948- Absolute import is the default behavior for 'import foo' etc.
949
Georg Brandl52b92cc2008-05-25 09:43:03 +0000950- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000951
Georg Brandl52b92cc2008-05-25 09:43:03 +0000952- Removed these Python builtins: apply(), callable(), coerce(),
953 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000954
Georg Brandl52b92cc2008-05-25 09:43:03 +0000955- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000956
Georg Brandl52b92cc2008-05-25 09:43:03 +0000957- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000958
959- Remove C API support for restricted execution.
960
Guido van Rossumcf1be882007-08-30 22:07:17 +0000961- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000962 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000963 sequences of unequal length -- it now stops after the shortest one
964 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000965
Georg Brandl52b92cc2008-05-25 09:43:03 +0000966- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000967
968- Added class decorators per PEP 3129.
969
970
971Extension Modules
972-----------------
973
Georg Brandl52b92cc2008-05-25 09:43:03 +0000974- Removed the imageop module. Obsolete long with its unit tests
975 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000976
Georg Brandl52b92cc2008-05-25 09:43:03 +0000977- Removed these attributes from the operator module: div, idiv,
978 __div__, __idiv__, isCallable, sequenceIncludes.
979
980- Removed these attributes from the sys module: exc_clear(), exc_type,
981 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000982
983
984Library
985-------
986
Georg Brandl52b92cc2008-05-25 09:43:03 +0000987- Removed the compiler package. Use of the _ast module and (an
988 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000989
Georg Brandl52b92cc2008-05-25 09:43:03 +0000990- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
991 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
992 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000993
Georg Brandl52b92cc2008-05-25 09:43:03 +0000994- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000995
Georg Brandl52b92cc2008-05-25 09:43:03 +0000996- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
997 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
998 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000999
Georg Brandl52b92cc2008-05-25 09:43:03 +00001000- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001001
Georg Brandl52b92cc2008-05-25 09:43:03 +00001002- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001003 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001004
Georg Brandl52b92cc2008-05-25 09:43:03 +00001005- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001006
Georg Brandl52b92cc2008-05-25 09:43:03 +00001007- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001008
1009- Patch #1680961: atexit has been reimplemented in C.
1010
Walter Dörwald41980ca2007-08-16 21:55:45 +00001011- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1012
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001013Build
1014-----
1015
1016C API
1017-----
1018
Georg Brandl52b92cc2008-05-25 09:43:03 +00001019- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001020
Georg Brandl52b92cc2008-05-25 09:43:03 +00001021- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1022 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001023
Georg Brandl52b92cc2008-05-25 09:43:03 +00001024- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001025
Georg Brandl52b92cc2008-05-25 09:43:03 +00001026- Removed these macros: staticforward, statichere, PyArg_GetInt,
1027 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001028
Georg Brandl52b92cc2008-05-25 09:43:03 +00001029- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1030 intintobjargproc, getreadbufferproc, getwritebufferproc,
1031 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001032
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001033Tests
1034-----
1035
Brett Cannone7a30f72008-03-03 03:36:27 +00001036- Removed test.testall as test.regrtest replaces it.
1037
Brett Cannonced04e02005-02-13 22:53:22 +00001038Documentation
1039-------------
1040
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001041Mac
1042---
1043
Georg Brandl52b92cc2008-05-25 09:43:03 +00001044- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001045
Guido van Rossum845702c2007-08-30 18:44:53 +00001046Platforms
1047---------
1048
1049- Support for BeOS and AtheOS was removed (according to PEP 11).
1050
1051- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1052
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001053Tools/Demos
1054-----------
1055
Georg Brandl52b92cc2008-05-25 09:43:03 +00001056
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001057**(For information about older versions, consult the HISTORY file.)**