blob: 78a89ec7058d781771bb0349e8fdb28f8b4e677b [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
Antoine Pitrouf71995782008-08-29 18:37:05 +000015- Issue #3668: Fix a memory leak with the "s*" argument parser in
16 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
17 was correctly parsed but parsing of subsequent arguments failed.
18
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +000019- Issue #3611: An exception __context__ could be cleared in a complex pattern
20 involving a __del__ method re-raising an exception.
21
Antoine Pitrouec569b72008-08-26 22:40:48 +000022- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
23 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
24 mechanism. In the process, fix a bug where isinstance() and issubclass(),
25 when given a tuple of classes as second argument, were looking up
26 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
27 type object.
28
Antoine Pitroue2dffc02008-08-26 22:02:58 +000029- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
30
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +000031- Issue #3651: Fix various memory leaks when using the buffer
32 interface, or when the "s#" code of PyArg_ParseTuple is given a
33 bytes object.
34
Neal Norwitz6ae2eb22008-08-24 23:50:08 +000035- Issue #3657: Fix uninitialized memory read when pickling longs.
36 Found by valgrind.
37
Neal Norwitz3ce5d922008-08-24 07:08:55 +000038- Apply security patches from Apple.
39
Neal Norwitz2f99b242008-08-24 05:48:10 +000040- Fix crashes on memory allocation failure found with failmalloc.
41
42- Fix memory leaks found with valgrind and update suppressions file.
43
44- Fix compiler warnings in opt mode which would lead to invalid memory reads.
45
46- Fix problem using wrong name in decimal module reported by pychecker.
47
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000048- Issue #3650: Fixed a reference leak in bytes.split('x').
49
Benjamin Petersonc15a0732008-08-26 16:46:47 +000050- bytes(o) now tries to use o.__bytes__() before using fallbacks.
51
52C API
53-----
54
55- PyObject_Bytes and PyBytes_FromObject were added.
56
Barry Warsaw8509df72008-08-21 03:02:47 +000057Library
58-------
59
Benjamin Peterson6784eb72008-08-23 20:32:27 +000060Extension Modules
61-----------------
62
63- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
64 exploitation of poor argument checking.
65
Jesus Cea6ba33292008-08-31 14:12:11 +000066- bsddb code updated to version 4.7.3pre2. This code is the same than
67 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
68 The Python code is automatically translated using "2to3". Please, do not
69 update this code in Python 3.0 by hand. Update the 2.6 one and then
70 do "2to3".
71
Neal Norwitz8f2f22a2008-08-24 20:59:23 +000072Tools/Demos
73-----------
74
75- Fix Misc/gdbinit so it works.
76
Barry Warsaw8509df72008-08-21 03:02:47 +000077
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000078What's new in Python 3.0b3?
79===========================
80
Barry Warsaw57c10582008-08-21 02:39:51 +000081*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000082
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000083Core and Builtins
84-----------------
85
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +000086- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
87 arguments.
88
Antoine Pitrou616d2852008-08-19 22:09:34 +000089- Issue #2394: implement more of the memoryview API, with the caveat that
90 only one-dimensional contiguous buffers are supported and exercised right
91 now. Slicing, slice assignment and comparison (equality and inequality)
92 have been added. Also, the tolist() method has been implemented, but only
93 for byte buffers. Endly, the API has been updated to return bytes objects
94 wherever it used to return bytearrays.
95
Antoine Pitrouee58fa42008-08-19 18:22:14 +000096- Issue #3560: clean up the new C PyMemoryView API so that naming is
97 internally consistent; add macros PyMemoryView_GET_BASE() and
98 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
99 without relying on a particular implementation; remove the ill-named
100 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
101
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000102- ctypes function pointers that are COM methods have a boolean True
103 value again.
104
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000105- Issue #1819: function calls with several named parameters are now on
106 average 35% faster (as measured by pybench).
107
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000108- The undocumented C APIs PyUnicode_AsString() and
109 PyUnicode_AsStringAndSize() were made private to the interpreter, in
110 order to be able to refine their interfaces for Python 3.1.
111
112 If you need to access the UTF-8 representation of a Unicode object
113 as bytes string, please use PyUnicode_AsUTF8String() instead.
114
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000115- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
116 to Python 3.0's stricter semantics which allow to avoid successive
117 reallocations of the result string (this also affects str.join()).
118
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000119
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000120Library
121-------
122
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000123- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
124 a build problem on MacOS with CJK locales. It adds four temporary
125 mappings to existing legacy codecs that are virtually compatible
126 with Mac encodings. They will be replaced by codecs correctly
127 implemented in 3.1.
128
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000129- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
130 "global name 'header' is not defined".
131
Antoine Pitroufd036452008-08-19 17:56:33 +0000132- Issue #2834: update the regular expression library to match the unicode
133 standards of py3k. In other words, mixing bytes and unicode strings
134 (be it as pattern, search string or replacement string) raises a TypeError.
135 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
136 and can be disabled by specifying a new re.ASCII flag; as for bytes
137 patterns, ASCII matching is the only option and trying to specify re.UNICODE
138 for such patterns raises a ValueError.
139
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000140- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
141 Code contributed by Matt Giuca. quote() now encodes the input
142 before quoting, unquote() decodes after unquoting. There are
143 new arguments to change the encoding and errors settings.
144 There are also new APIs to skip the encode/decode steps.
145 [un]quote_plus() are also affected.
146
Nick Coghlan36f49522008-08-18 12:31:52 +0000147- Issue #2235: numbers.Number now blocks inheritance of the default id()
148 based hash because that hash mechanism is not correct for numeric types.
149 All concrete numeric types that inherit from Number (rather than just
150 registering with it) must explicitly provide a hash implementation in
151 order for their instances to be hashable.
152
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000153- Issue #2676: in the email package, content-type parsing was hanging on
154 pathological input because of quadratic or exponential behaviour of a
155 regular expression.
156
Antoine Pitrou87695762008-08-14 22:44:29 +0000157- Issue #3476: binary buffered reading through the new "io" library is now
158 thread-safe.
159
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000160- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
161 menu entries were not deleted.
162
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000163- Remove the TarFileCompat class from tarfile.py.
164
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000165- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
166 accepts the same parameters. It just checks that its first argument is an
167 integer.
168
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000169- Issue #3394: zipfile.writestr sets external attributes when passed a
170 file name rather than a ZipInfo instance, so files are extracted with
171 mode 0600 rather than 000 under Unix.
172
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000173- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
174 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000175
Martin v. Löwis371bb502008-08-16 13:02:57 +0000176Extension Modules
177-----------------
178
179- Bug #3542: Support Unicode strings in _msi module.
180
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000181What's new in Python 3.0b2?
182===========================
183
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000184*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000185
186Core and Builtins
187-----------------
188
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000189- Issue #3008: the float type has a new instance method 'float.hex'
190 and a new class method 'float.fromhex' to convert floating-point
191 numbers to and from hexadecimal strings, respectively.
192
Eric Smithd68af8f2008-07-16 00:15:35 +0000193- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
194 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
195
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000196- Issue #3280: like chr(), the "%c" format now accepts unicode code points
197 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
198 "narrow Unicode" builds, the result is a string of 2 code units, forming a
199 UTF-16 surrogate pair.
200
Georg Brandld52429f2008-07-04 15:55:02 +0000201- Issue #3282: str.isprintable() should return False for undefined
202 Unicode characters.
203
Martin v. Löwis029656f2008-06-30 04:06:08 +0000204- Issue #3236: Return small longs from PyLong_FromString.
205
Benjamin Petersone6528212008-07-15 15:32:09 +0000206- Exception tracebacks now support exception chaining.
207
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000208Library
209-------
210
Brett Cannonc2542e92008-07-25 18:19:20 +0000211- Removed the sunaudio module. Use sunau instead.
212
Thomas Heller47bc8092008-08-19 06:38:12 +0000213- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
214 api functions without holding the GIL, which could lead to a fatal
215 error when they failed.
216
217- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
218
Georg Brandl30704ea02008-07-23 15:07:12 +0000219- Removed "ast" function aliases from the parser module.
220
Thomas Heller15383a02008-07-15 19:46:52 +0000221- Issue #3313: Fixed a crash when a failed dlopen() call does not set
222 a valid dlerror() message.
223
Thomas Heller0261e1e2008-07-15 17:25:07 +0000224- Issue #3258: Fixed a crash when a ctypes POINTER type to an
225 incomplete structure was created.
226
Georg Brandl1abcbf82008-07-01 19:28:43 +0000227- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
228 argument now must be a bytes object in any case.
229
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000230- Issue #3145: help("modules whatever") failed when trying to load the source
231 code of every single module of the standard library, including invalid files
232 used in the test suite.
233
Georg Brandlbded4d32008-07-17 18:15:35 +0000234- The gettext library now consistently uses Unicode strings for message ids
235 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000236
Benjamin Petersone6528212008-07-15 15:32:09 +0000237- The traceback module has been expanded to handle chained exceptions.
238
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000239C API
240-----
241
242- Issue #3247: the function Py_FindMethod was removed. Modern types should
243 use the tp_methods slot instead.
244
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000245Tools/Demos
246-----------
247
Georg Brandl336341f2008-07-01 20:21:28 +0000248- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000249
Georg Brandl336341f2008-07-01 20:21:28 +0000250- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000251
252
Brett Cannon0d71ee72008-05-08 18:13:40 +0000253What's new in Python 3.0b1?
254===========================
255
Barry Warsawc1e689e2008-06-19 00:35:43 +0000256*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000257
258Core and Builtins
259-----------------
260
Brett Cannondb734912008-06-27 00:52:15 +0000261- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
262 argument being anything other than a dict or None. Also fixed a bug in error
263 handling when 'message' and 'category' were both set to None, triggering a
264 bus error.
265
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000266- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
267 holds the last (strong) reference to its referent.
268
Georg Brandl559e5d72008-06-11 18:37:52 +0000269- Issue #2630: implement PEP 3138. repr() now returns printable
270 Unicode characters unescaped, to get an ASCII-only representation
271 of an object use ascii().
272
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000273- Issue #1342: On windows, Python could not start when installed in a
274 directory with non-ascii characters.
275
Martin v. Löwis1a214512008-06-11 05:26:20 +0000276- Implement PEP 3121: new module initialization and finalization API.
277
Georg Brandle1b5ac62008-06-04 13:06:58 +0000278- Removed the already-defunct ``-t`` option.
279
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000280- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
281 unmarshalling many code objects, which happens when importing a
282 large .pyc file (~1000 functions).
283
Georg Brandl52b92cc2008-05-25 09:43:03 +0000284- Issue #2963: fix merging oversight that disabled method cache for
285 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000286
Georg Brandlc9b09532008-05-25 09:24:38 +0000287- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
288
Georg Brandl52b92cc2008-05-25 09:43:03 +0000289- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000290
Georg Brandl52b92cc2008-05-25 09:43:03 +0000291- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
292 code now allows any unicode string and returns a utf-8 encoded
293 buffer, just like the "s#" code already does. The "z" code was
294 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000295
Georg Brandl52b92cc2008-05-25 09:43:03 +0000296- Issue #2863: generators now have a ``gen.__name__`` attribute that
297 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
298 ``func.func_code.co_name``. The repr() of a generator now also
299 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000300
301- Issue #2831: enumerate() now has a ``start`` argument.
302
Georg Brandl52b92cc2008-05-25 09:43:03 +0000303- Issue #2801: fix bug in the float.is_integer method where a
304 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000305
Georg Brandl52b92cc2008-05-25 09:43:03 +0000306- The ``--with-toolbox-glue`` option (and the associated
307 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000308
Georg Brandl52b92cc2008-05-25 09:43:03 +0000309- Issue #2196: hasattr() now lets exceptions which do not inherit
310 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
311 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000312
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000313- #3021 Exception reraising sematics have been significantly improved. However,
314 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
315 code anymore.
316
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000317- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
318 removed.
319
Brett Cannon0d71ee72008-05-08 18:13:40 +0000320Extension Modules
321-----------------
322
Georg Brandl38feaf02008-05-25 07:45:51 +0000323- Renamed ``_winreg`` module to ``winreg``.
324
Georg Brandl52b92cc2008-05-25 09:43:03 +0000325- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
326 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000327
328- Support for Windows 9x has been removed from the winsound module.
329
Georg Brandl52b92cc2008-05-25 09:43:03 +0000330- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000331
Brett Cannon0d71ee72008-05-08 18:13:40 +0000332Library
333-------
334
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000335- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
336 symtable.Symbol have been removed.
337
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000338- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
339
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000340- a new ``urllib`` package was created. It consists of code from
341 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
342 modules have all been removed. The new package has five submodules:
343 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
344 ``urllib.error``, and ``urllib.robotparser``. The
345 ``urllib.request.urlopen()`` function uses the url opener from
346 ``urllib2``. (Note that the unittests have not been renamed for the
347 beta, but they will be renamed in the future.)
348
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000349- rfc822 has been removed in favor of the email package.
350
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000351- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000352
Barry Warsawf5019422008-06-12 02:42:00 +0000353- Patch #2849: Remove use of rfc822 module from standard library.
354
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000355- Added C optimized implementation of io.StringIO.
356
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000357- The ``pickle`` module is now automatically use an optimized C
358 implementation of Pickler and Unpickler when available. The
359 ``cPickle`` module is no longer needed.
360
Georg Brandl877b10a2008-06-01 21:25:55 +0000361- Removed the ``htmllib`` and ``sgmllib`` modules.
362
Georg Brandl61013952008-05-28 15:56:30 +0000363- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
364 been removed from ``http.cookies``.
365
Brett Cannona23810f2008-05-26 19:04:21 +0000366- The ``commands`` module has been removed. Its getoutput() and
367 getstatusoutput() functions have been moved to the ``subprocess`` module.
368
Georg Brandl3d5c4252008-05-26 18:03:26 +0000369- The ``http`` package was created; it contains the old ``httplib``
370 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
371 as ``http.cookiejar``, and the content of the three ``HTTPServer``
372 modules as ``http.server``.
373
Georg Brandl38eceaa2008-05-26 11:14:17 +0000374- The ``xmlrpc`` package was created; it contains the old
375 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
376 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000377 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000378
379- The ``dbm`` package was created, containing the old modules
380 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
381 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
382 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
383 as submodules.
384
Georg Brandl52b92cc2008-05-25 09:43:03 +0000385- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000386
Georg Brandl52b92cc2008-05-25 09:43:03 +0000387- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000388
Georg Brandl52b92cc2008-05-25 09:43:03 +0000389- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000390
Georg Brandl52b92cc2008-05-25 09:43:03 +0000391- Issue #2250: Exceptions raised during evaluation of names in
392 rlcompleter's ``Completer.complete()`` method are now caught and
393 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000394
Georg Brandl52b92cc2008-05-25 09:43:03 +0000395- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
396 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000397
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000398- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
399 large to fit in a C long. ldexp(x, n) now returns a zero (with
400 suitable sign) if n is large and negative; previously, it raised
401 OverflowError.
402
Georg Brandl52b92cc2008-05-25 09:43:03 +0000403- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000404
Georg Brandl52b92cc2008-05-25 09:43:03 +0000405- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000406
Georg Brandl52b92cc2008-05-25 09:43:03 +0000407- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000408
Georg Brandl52b92cc2008-05-25 09:43:03 +0000409- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000410
Georg Brandl52b92cc2008-05-25 09:43:03 +0000411- Fixed the ``__all__`` setting on ``collections`` to include
412 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000413
Brett Cannoncf3520c2008-05-11 22:47:58 +0000414- The sre module has been removed.
415
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000416- The Queue module has been renamed to queue.
417
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000418- The copy_reg module has been renamed to copyreg.
419
Brett Cannond8b61ee2008-05-11 03:00:26 +0000420- The mhlib module has been removed.
421
Brett Cannonbd474422008-05-10 22:42:14 +0000422- The ihooks module has been removed.
423
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000424- The fpformat module has been removed.
425
Brett Cannonf4fd9932008-05-10 21:11:46 +0000426- The dircache module has been removed.
427
Brett Cannond175b4c2008-05-10 03:19:54 +0000428- The Canvas module has been removed.
429
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000430- The Decimal module gained the magic methods __round__, __ceil__,
431 __floor__ and __trunc__, to give support for round, math.ceil,
432 math.floor and math.trunc.
433
Brett Cannon900ee3a2008-05-08 20:31:11 +0000434- The user module has been removed.
435
Brett Cannon34afe872008-05-08 20:31:44 +0000436- The mutex module has been removed.
437
Brett Cannon0d71ee72008-05-08 18:13:40 +0000438- The imputil module has been removed.
439
Georg Brandl52b92cc2008-05-25 09:43:03 +0000440- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000441
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000442- pdb gained the "until" command.
443
Georg Brandl52b92cc2008-05-25 09:43:03 +0000444- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000445
Georg Brandl32de7af2008-08-18 23:07:41 +0000446- The threading module API was renamed to be PEP 8 compliant. The
447 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000448
Georg Brandl294d5a92008-06-01 19:25:32 +0000449Tools/Demos
450-----------
451
452- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000453
Brett Cannon0d71ee72008-05-08 18:13:40 +0000454Build
455-----
456
457
Barry Warsaw66079cd2008-04-04 01:36:36 +0000458What's New in Python 3.0a5?
459===========================
460
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000461*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000462
463Core and Builtins
464-----------------
465
Georg Brandl52b92cc2008-05-25 09:43:03 +0000466- Fixed misbehaviour of PyLong_FromSsize_t on systems where
467 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000468
Georg Brandl52b92cc2008-05-25 09:43:03 +0000469- Issue #2221: Corrected a SystemError "error return without exception
470 set", when the code executed by exec() raises an exception, and
471 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000472
Georg Brandl52b92cc2008-05-25 09:43:03 +0000473- Bug #2565: The repr() of type objects now calls them 'class', not
474 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000475
Martin v. Löwis790465f2008-04-05 20:41:37 +0000476- The command line processing was converted to pass Unicode strings
477 through as unmodified as possible; as a consequence, the C API
478 related to command line arguments was changed to use wchar_t.
479
Georg Brandl52b92cc2008-05-25 09:43:03 +0000480- All backslashes in raw strings are interpreted literally. This
481 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000482
Barry Warsaw66079cd2008-04-04 01:36:36 +0000483Extension Modules
484-----------------
485
486Library
487-------
488
Georg Brandl52b92cc2008-05-25 09:43:03 +0000489- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000490
Thomas Hellere106dc32008-04-24 18:39:36 +0000491- Issue #2682: ctypes callback functions now longer contain a cyclic
492 reference to themselves.
493
Georg Brandl52b92cc2008-05-25 09:43:03 +0000494- Issue #2058: Remove the buf attribute and add __slots__ to the
495 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000496
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000497- Bug #2606: Avoid calling .sort() on a dict_keys object.
498
Thomas Hellerbff533b2008-04-04 19:53:14 +0000499- The bundled libffi copy is now in sync with the recently released
500 libffi3.0.5 version, apart from some small changes to
501 Modules/_ctypes/libffi/configure.ac.
502
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000503Build
504-----
505
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000506- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
507
Guido van Rossumdc21db32008-04-07 18:37:41 +0000508- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000509 accidentally overwriting a Python 2.x installation. Use "make
510 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000511
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000512- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
513 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000514
Georg Brandl52b92cc2008-05-25 09:43:03 +0000515
Barry Warsawa9d499d2008-03-01 18:38:07 +0000516What's New in Python 3.0a4?
517===========================
518
Barry Warsawbb5cd082008-04-02 23:33:27 +0000519*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000520
Martin v. Löwis25931462008-03-17 20:43:42 +0000521Core and Builtins
522-----------------
523
524- Bug #2301: Don't try decoding the source code into the original
525 encoding for syntax errors.
526
Martin v. Löwis92fab752008-03-08 10:40:41 +0000527Extension Modules
528-----------------
529
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000530- The dl module was removed, use the ctypes module instead.
531
Martin v. Löwis92fab752008-03-08 10:40:41 +0000532- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000533
Martin v. Löwis071ef772008-03-08 11:24:24 +0000534Library
535-------
536
Georg Brandl52b92cc2008-05-25 09:43:03 +0000537- The class distutils.commands.build_py.build_py_2to3 can be used as a
538 build_py replacement to automatically run 2to3 on modules that are
539 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000540
Guido van Rossumf4169812008-03-17 22:56:06 +0000541- A new pickle protocol (protocol 3) is added with explicit support
542 for bytes. This is the default protocol. It intentionally cannot
543 be unpickled by Python 2.x.
544
545- When a pickle written by Python 2.x contains an (8-bit) str
546 instance, this is now decoded to a (Unicode) str instance. The
547 encoding used to do this defaults to ASCII, but can be overridden
548 via two new keyword arguments to the Unpickler class. Previously
549 this would create bytes instances, which is usually wrong: str
550 instances are often used to pickle attribute names etc., and text is
551 more common than binary data anyway.
552
Martin v. Löwis071ef772008-03-08 11:24:24 +0000553- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000554 system doesn't support CODESET and LANG isn't set or doesn't allow
555 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000556
Georg Brandl52b92cc2008-05-25 09:43:03 +0000557- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
558 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000559
Georg Brandl52b92cc2008-05-25 09:43:03 +0000560- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
561 has been renamed tokenize and now works with bytes rather than
562 strings. A new detect_encoding function has been added for
563 determining source file encoding according to PEP-0263. Token
564 sequences returned by tokenize always start with an ENCODING token
565 which specifies the encoding used to decode the file. This token is
566 used to encode the output of untokenize back to bytes.
567
Barry Warsawa9d499d2008-03-01 18:38:07 +0000568
Christian Heimesbc873412007-12-08 22:11:32 +0000569What's New in Python 3.0a3?
570===========================
571
Barry Warsaw659fc422008-03-01 17:45:23 +0000572*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000573
574Core and Builtins
575-----------------
576
Georg Brandl52b92cc2008-05-25 09:43:03 +0000577- Issue #2282: io.TextIOWrapper was not overriding seekable() from
578 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000579
Georg Brandl52b92cc2008-05-25 09:43:03 +0000580- Issue #2115: Important speedup in setting __slot__ attributes. Also
581 prevent a possible crash: an Abstract Base Class would try to access
582 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000583
Georg Brandl52b92cc2008-05-25 09:43:03 +0000584- Fixed repr() and str() of complex numbers with infinity or nan as
585 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000586
Georg Brandl52b92cc2008-05-25 09:43:03 +0000587- Clear all free list during a gc.collect() of the highest generation
588 in order to allow pymalloc to free more arenas. Python may give back
589 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000590
Georg Brandl52b92cc2008-05-25 09:43:03 +0000591- Issue #2045: Fix an infinite recursion triggered when printing a
592 subclass of collections.defaultdict, if its default_factory is set
593 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000594
595- Fixed a minor memory leak in dictobject.c. The content of the free
596 list was not freed on interpreter shutdown.
597
Georg Brandl52b92cc2008-05-25 09:43:03 +0000598- Limit free list of method and builtin function objects to 256
599 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000600
Georg Brandl52b92cc2008-05-25 09:43:03 +0000601- Patch #1953: Added ``sys._compact_freelists()`` and the C API
602 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000603 to compact the internal free lists of pre-allocted ints and floats.
604
605- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000606 Python expected the return type int but the fork familie returns
607 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000608
Georg Brandl52b92cc2008-05-25 09:43:03 +0000609- Issue #1678380: Fix a bug that identifies 0j and -0j when they
610 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000611
Georg Brandl52b92cc2008-05-25 09:43:03 +0000612- Issue #2025: Added tuple.count() and tuple.index() methods to comply
613 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000614
Georg Brandl52b92cc2008-05-25 09:43:03 +0000615- Fixed multiple reinitialization of the Python interpreter. The small
616 int list in longobject.c has caused a seg fault during the third
617 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000618
Georg Brandl52b92cc2008-05-25 09:43:03 +0000619- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000620
Georg Brandl52b92cc2008-05-25 09:43:03 +0000621- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000622
Georg Brandl52b92cc2008-05-25 09:43:03 +0000623- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000624
Georg Brandl52b92cc2008-05-25 09:43:03 +0000625- map() no longer accepts None for the first argument. Use zip()
626 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000627
Facundo Batista2336bdd2008-01-19 19:12:01 +0000628- Issue #1769: Now int("- 1") is not allowed any more.
629
Georg Brandl52b92cc2008-05-25 09:43:03 +0000630- Object/longobject.c: long(float('nan')) raises an OverflowError
631 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000632
Georg Brandl52b92cc2008-05-25 09:43:03 +0000633- Issue #1762972: __file__ points to the source file instead of the
634 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000635
Guido van Rossumab078dd2008-01-06 00:09:11 +0000636- Issue #1393: object_richcompare() returns NotImplemented instead of
637 False if the objects aren't equal, to give the other side a chance.
638
Guido van Rossume239b002008-01-06 00:44:20 +0000639- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000640
Georg Brandl52b92cc2008-05-25 09:43:03 +0000641- Improve some exception messages when Windows fails to load an
642 extension module. Now we get for example '%1 is not a valid Win32
643 application' instead of 'error code 193'. Also use Unicode strings
644 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000645
Georg Brandl52b92cc2008-05-25 09:43:03 +0000646- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
647 Python C API has gained a new type *PyInstanceMethod_Type* and the
648 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
649 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000650
Georg Brandl52b92cc2008-05-25 09:43:03 +0000651- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
652 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
653 are now enough to print the corresponding list of objects considered
654 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000655
Georg Brandl52b92cc2008-05-25 09:43:03 +0000656- Issue #1573: Improper use of the keyword-only syntax makes the
657 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000658
Georg Brandl52b92cc2008-05-25 09:43:03 +0000659- Issue #1564: The set implementation should special-case PyUnicode
660 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000661
Guido van Rossumea6775b2008-02-21 20:16:31 +0000662- Patch #1031213: Decode source line in SyntaxErrors back to its
663 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000664
Christian Heimes09aaa882008-02-23 15:01:06 +0000665- inspect.getsource() includes the decorators again.
666
Guido van Rossumea6775b2008-02-21 20:16:31 +0000667- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
668 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000669
Georg Brandl52b92cc2008-05-25 09:43:03 +0000670- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
671 the first chunk fed to the decoder started with a BOM, but was
672 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000673
Christian Heimesbc873412007-12-08 22:11:32 +0000674Extension Modules
675-----------------
676
Georg Brandl52b92cc2008-05-25 09:43:03 +0000677- Code for itertools ifilter(), imap(), and izip() moved to bultins
678 and renamed to filter(), map(), and zip(). Also, renamed
679 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000680
Georg Brandl52b92cc2008-05-25 09:43:03 +0000681- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000682
Georg Brandl52b92cc2008-05-25 09:43:03 +0000683- Bug #2111: mmap segfaults when trying to write a block opened with
684 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000685
Georg Brandl52b92cc2008-05-25 09:43:03 +0000686- Issue #2063: correct order of utime and stime in os.times() result
687 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000688
Christian Heimesbc873412007-12-08 22:11:32 +0000689Library
690-------
691
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000692- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000693
Georg Brandl52b92cc2008-05-25 09:43:03 +0000694- Created new UserDict class in collections module. This one inherits
695 from and complies with the MutableMapping ABC. Also, moved
696 UserString and UserList to the collections module. The
697 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000698
Guido van Rossumea6775b2008-02-21 20:16:31 +0000699- Removed UserDict.DictMixin. Replaced all its uses with
700 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000701
Guido van Rossume239b002008-01-06 00:44:20 +0000702- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000703
Guido van Rossume239b002008-01-06 00:44:20 +0000704- Issue #1585: IDLE uses non-existent xrange() function.
705
706- Issue #1578: Problems in win_getpass.
707
Georg Brandl52d168a2008-01-07 18:10:24 +0000708Build
709-----
710
Georg Brandl52b92cc2008-05-25 09:43:03 +0000711- Renamed --enable-unicode configure flag to --with-wide-unicode,
712 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000713
Guido van Rossume239b002008-01-06 00:44:20 +0000714C API
715-----
716
717- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
718 Py_TYPE and Py_REFCNT.
719
Georg Brandl52b92cc2008-05-25 09:43:03 +0000720- New API PyImport_ImportModuleNoBlock(), works like
721 PyImport_ImportModule() but won't block on the import lock
722 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000723
Christian Heimesbc873412007-12-08 22:11:32 +0000724
Fred Drake0e474a82007-10-11 18:01:43 +0000725What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000726===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000727
Guido van Rossum99533a92007-12-06 05:07:41 +0000728*Release date: 07-Dec-2007*
729
730(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000731
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000732Core and Builtins
733-----------------
734
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000735- str8 now has the same construction signature as bytes.
736
Georg Brandl52b92cc2008-05-25 09:43:03 +0000737- Comparisons between str and str8 now return False/True for ==/!=.
738 sqlite3 returns str8 when recreating on object from it's __conform__
739 value. The struct module returns str8 for all string-related
740 formats. This was true before this change, but becomes more
741 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000742
Georg Brandl52b92cc2008-05-25 09:43:03 +0000743- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
744 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000745
746- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
747
748- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000749 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000750 `PyUnicode_DecodeFSDefault(char*)` was added.
751
Georg Brandl52b92cc2008-05-25 09:43:03 +0000752- io.open() and _fileio.FileIO have grown a new argument closefd. A
753 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000754
Georg Brandl52b92cc2008-05-25 09:43:03 +0000755- Added a new option -b to issues warnings (-bb for errors) about
756 certain operations between bytes/buffer and str like str(b'') and
757 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000758
Georg Brandl52b92cc2008-05-25 09:43:03 +0000759- The standards streams sys.stdin, stdout and stderr may be None when
760 the when the C runtime library returns an invalid file descriptor
761 for the streams (fileno(stdin) < 0). For now this happens only for
762 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000763
Christian Heimesbce52be2007-11-17 19:08:41 +0000764- Added PCbuild9 directory for VS 2008.
765
Georg Brandl52b92cc2008-05-25 09:43:03 +0000766- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
767 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000768
Georg Brandl52b92cc2008-05-25 09:43:03 +0000769- Unbound methods are gone for good. ClassObject.method returns an
770 ordinary function object, instance.method still returns a bound
771 method object. The API of bound methods is cleaned up, too. The
772 im_class attribute is removed and im_func + im_self are renamed to
773 __func__ and __self__. The factory PyMethod_New takes only func and
774 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000775
Georg Brandl52b92cc2008-05-25 09:43:03 +0000776- intobject.h is no longer included by Python.h. The remains were
777 moved to longobject.h. It still exists to define several aliases
778 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000779
Christian Heimesa37d4c62007-12-04 23:02:19 +0000780- Removed sys.maxint, use sys.maxsize instead.
781
Fred Drake0e474a82007-10-11 18:01:43 +0000782Extension Modules
783-----------------
784
785- The `hotshot` profiler has been removed; use `cProfile` instead.
786
Brett Cannone9fd2312007-10-12 19:18:19 +0000787Library
788-------
789
Georg Brandl52b92cc2008-05-25 09:43:03 +0000790- When loading an external file using testfile(), the passed-in
791 encoding argument was being ignored if __loader__ is defined and
792 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000793
Georg Brandl52b92cc2008-05-25 09:43:03 +0000794- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
795 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000796
Christian Heimesc9543e42007-11-28 08:28:28 +0000797- Removed the 'new' module.
798
Georg Brandl52b92cc2008-05-25 09:43:03 +0000799- Removed all types from the 'types' module that are easily accessable
800 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000801
Georg Brandl52d168a2008-01-07 18:10:24 +0000802
Guido van Rossum4405cf32007-08-30 17:16:55 +0000803What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000804==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000805
Guido van Rossum4405cf32007-08-30 17:16:55 +0000806*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000807
808Core and Builtins
809-----------------
810
Martin v. Löwis47383402007-08-15 07:32:56 +0000811- PEP 3131: Support non-ASCII identifiers.
812
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000813- PEP 3120: Change default encoding to UTF-8.
814
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000815- PEP 3123: Use proper C inheritance for PyObject.
816
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000817- Removed the __oct__ and __hex__ special methods and added a bin()
818 builtin function.
819
Georg Brandl52b92cc2008-05-25 09:43:03 +0000820- PEP 3127: octal literals now start with "0o". Old-style octal
821 literals are invalid. There are binary literals with a prefix of
822 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000823
Guido van Rossume7ba4952007-06-06 23:52:48 +0000824- None, True, False are now keywords.
825
Guido van Rossum29478ef2007-05-29 00:39:44 +0000826- PEP 3119: isinstance() and issubclass() can be overridden.
827
Guido van Rossumebe3e162007-05-17 18:20:34 +0000828- Remove BaseException.message.
829
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000830- Remove tuple parameter unpacking (PEP 3113).
831
Georg Brandl52b92cc2008-05-25 09:43:03 +0000832- Remove the f_restricted attribute from frames. This naturally leads
833 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000834
Georg Brandl52b92cc2008-05-25 09:43:03 +0000835- PEP 3132 was accepted. That means that you can do ``a, *b =
836 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000837
Georg Brandl52b92cc2008-05-25 09:43:03 +0000838- range() now returns an iterator rather than a list. Floats are not
839 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000840
Nick Coghlan650f0d02007-04-15 12:05:43 +0000841- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000842 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000843
Guido van Rossume27dc722007-03-27 22:37:34 +0000844- By default, != returns the opposite of ==, unless the latter returns
845 NotImplemented.
846
Georg Brandl52b92cc2008-05-25 09:43:03 +0000847- Patch #1680961: sys.exitfunc has been removed and replaced with a
848 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000849
Georg Brandl801dd732007-03-18 20:18:31 +0000850- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000851 keyword arg in the class statement, which can now use the full
852 syntax of a parameter list. Also, the metaclass can implement a
853 __prepare__ function which will be called to create the dictionary
854 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000855
Georg Brandl428f0642007-03-18 18:35:15 +0000856- The long-deprecated argument "pend" of PyFloat_FromString() has been
857 removed.
858
Georg Brandle32b4222007-03-10 22:13:27 +0000859- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000860 its argument, if it exists. If not, it will work like before. This
861 allows customizing the output of dir() in the presence of a
862 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000863
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000864- Removed support for __members__ and __methods__.
865
Georg Brandle32b4222007-03-10 22:13:27 +0000866- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000867
Georg Brandle32b4222007-03-10 22:13:27 +0000868- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000869 functionality formerly known as raw_input(); the name raw_input() is
870 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000871
Georg Brandl52b92cc2008-05-25 09:43:03 +0000872- Classes listed in an 'except' clause must inherit from
873 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000874
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000875- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000876 and .keys(), .items(), .values() return dict views, which behave
877 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000878
Guido van Rossum8b545362007-02-09 23:52:14 +0000879- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000880 'softspace' attribute of files is now gone (since print() doesn't
881 use it). A side effect of this change is that you can get
882 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000883
884 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000885 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000886
887 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000888
Brett Cannon398db8b2007-01-29 23:44:37 +0000889- PEP 3102: keyword-only arguments.
890
Georg Brandl52b92cc2008-05-25 09:43:03 +0000891- Int/Long unification is complete. The 'long' built-in type and
892 literals with trailing 'L' or 'l' have been removed. Performance
893 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000894
895- 'except E, V' must now be spelled as 'except E as V' and deletes V
896 at the end of the except clause; V must be a simple name.
897
Neal Norwitzc1505362006-12-28 06:47:50 +0000898- Added function annotations per PEP 3107.
899
Georg Brandl52b92cc2008-05-25 09:43:03 +0000900- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000901
902 >>> def f(x):
903 ... def inc():
904 ... nonlocal x
905 ... x += 1
906 ... return x
907 ... return inc
908 ...
909 >>> inc = f(0)
910 >>> inc()
911 1
912 >>> inc()
913 2
914
Georg Brandl66a796e2006-12-19 20:50:34 +0000915- Moved intern() to sys.intern().
916
917- exec is now a function.
918
919- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000920
Neal Norwitz4886cc32006-08-21 17:06:07 +0000921- Classic classes are a thing of the past. All classes are new style.
922
923- Exceptions *must* derive from BaseException.
924
925- Integer division always returns a float. The -Q option is no more.
926 All the following are gone:
927 * PyNumber_Divide and PyNumber_InPlaceDivide
928 * __div__, __rdiv__, and __idiv__
929 * nb_divide, nb_inplace_divide
930 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
931 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
932 if we want to re-use __div__ and friends. If we do, it will make
933 it harder to write code for both 2.x and 3.x.)
934
935- 'as' and 'with' are keywords.
936
937- Absolute import is the default behavior for 'import foo' etc.
938
Georg Brandl52b92cc2008-05-25 09:43:03 +0000939- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000940
Georg Brandl52b92cc2008-05-25 09:43:03 +0000941- Removed these Python builtins: apply(), callable(), coerce(),
942 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000943
Georg Brandl52b92cc2008-05-25 09:43:03 +0000944- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000945
Georg Brandl52b92cc2008-05-25 09:43:03 +0000946- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000947
948- Remove C API support for restricted execution.
949
Guido van Rossumcf1be882007-08-30 22:07:17 +0000950- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000951 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000952 sequences of unequal length -- it now stops after the shortest one
953 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000954
Georg Brandl52b92cc2008-05-25 09:43:03 +0000955- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000956
957- Added class decorators per PEP 3129.
958
959
960Extension Modules
961-----------------
962
Georg Brandl52b92cc2008-05-25 09:43:03 +0000963- Removed the imageop module. Obsolete long with its unit tests
964 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000965
Georg Brandl52b92cc2008-05-25 09:43:03 +0000966- Removed these attributes from the operator module: div, idiv,
967 __div__, __idiv__, isCallable, sequenceIncludes.
968
969- Removed these attributes from the sys module: exc_clear(), exc_type,
970 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000971
972
973Library
974-------
975
Georg Brandl52b92cc2008-05-25 09:43:03 +0000976- Removed the compiler package. Use of the _ast module and (an
977 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000978
Georg Brandl52b92cc2008-05-25 09:43:03 +0000979- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
980 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
981 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000982
Georg Brandl52b92cc2008-05-25 09:43:03 +0000983- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000984
Georg Brandl52b92cc2008-05-25 09:43:03 +0000985- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
986 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
987 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000988
Georg Brandl52b92cc2008-05-25 09:43:03 +0000989- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000990
Georg Brandl52b92cc2008-05-25 09:43:03 +0000991- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000992 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000993
Georg Brandl52b92cc2008-05-25 09:43:03 +0000994- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000995
Georg Brandl52b92cc2008-05-25 09:43:03 +0000996- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000997
998- Patch #1680961: atexit has been reimplemented in C.
999
Walter Dörwald41980ca2007-08-16 21:55:45 +00001000- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1001
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001002Build
1003-----
1004
1005C API
1006-----
1007
Georg Brandl52b92cc2008-05-25 09:43:03 +00001008- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001009
Georg Brandl52b92cc2008-05-25 09:43:03 +00001010- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1011 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001012
Georg Brandl52b92cc2008-05-25 09:43:03 +00001013- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001014
Georg Brandl52b92cc2008-05-25 09:43:03 +00001015- Removed these macros: staticforward, statichere, PyArg_GetInt,
1016 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001017
Georg Brandl52b92cc2008-05-25 09:43:03 +00001018- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1019 intintobjargproc, getreadbufferproc, getwritebufferproc,
1020 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001021
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001022Tests
1023-----
1024
Brett Cannone7a30f72008-03-03 03:36:27 +00001025- Removed test.testall as test.regrtest replaces it.
1026
Brett Cannonced04e02005-02-13 22:53:22 +00001027Documentation
1028-------------
1029
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001030Mac
1031---
1032
Georg Brandl52b92cc2008-05-25 09:43:03 +00001033- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001034
Guido van Rossum845702c2007-08-30 18:44:53 +00001035Platforms
1036---------
1037
1038- Support for BeOS and AtheOS was removed (according to PEP 11).
1039
1040- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1041
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001042Tools/Demos
1043-----------
1044
Georg Brandl52b92cc2008-05-25 09:43:03 +00001045
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001046**(For information about older versions, consult the HISTORY file.)**