blob: 2f1f58a30839e2509763cdfafea3d45fbf343646 [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 Pitrouc6b09eb2008-09-01 15:10:14 +000015- Issue #3712: The memoryview object had a reference leak and didn't support
16 cyclic garbage collection.
17
Antoine Pitrouf71995782008-08-29 18:37:05 +000018- Issue #3668: Fix a memory leak with the "s*" argument parser in
19 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
20 was correctly parsed but parsing of subsequent arguments failed.
21
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +000022- Issue #3611: An exception __context__ could be cleared in a complex pattern
23 involving a __del__ method re-raising an exception.
24
Antoine Pitrouec569b72008-08-26 22:40:48 +000025- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
26 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
27 mechanism. In the process, fix a bug where isinstance() and issubclass(),
28 when given a tuple of classes as second argument, were looking up
29 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
30 type object.
31
Antoine Pitroue2dffc02008-08-26 22:02:58 +000032- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
33
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +000034- Issue #3651: Fix various memory leaks when using the buffer
35 interface, or when the "s#" code of PyArg_ParseTuple is given a
36 bytes object.
37
Neal Norwitz6ae2eb22008-08-24 23:50:08 +000038- Issue #3657: Fix uninitialized memory read when pickling longs.
39 Found by valgrind.
40
Neal Norwitz3ce5d922008-08-24 07:08:55 +000041- Apply security patches from Apple.
42
Neal Norwitz2f99b242008-08-24 05:48:10 +000043- Fix crashes on memory allocation failure found with failmalloc.
44
45- Fix memory leaks found with valgrind and update suppressions file.
46
47- Fix compiler warnings in opt mode which would lead to invalid memory reads.
48
49- Fix problem using wrong name in decimal module reported by pychecker.
50
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000051- Issue #3650: Fixed a reference leak in bytes.split('x').
52
Benjamin Petersonc15a0732008-08-26 16:46:47 +000053- bytes(o) now tries to use o.__bytes__() before using fallbacks.
54
55C API
56-----
57
58- PyObject_Bytes and PyBytes_FromObject were added.
59
Barry Warsaw8509df72008-08-21 03:02:47 +000060Library
61-------
62
Benjamin Peterson6784eb72008-08-23 20:32:27 +000063Extension Modules
64-----------------
65
66- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
67 exploitation of poor argument checking.
68
Jesus Cea6ba33292008-08-31 14:12:11 +000069- bsddb code updated to version 4.7.3pre2. This code is the same than
70 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
71 The Python code is automatically translated using "2to3". Please, do not
72 update this code in Python 3.0 by hand. Update the 2.6 one and then
73 do "2to3".
74
Neal Norwitz8f2f22a2008-08-24 20:59:23 +000075Tools/Demos
76-----------
77
78- Fix Misc/gdbinit so it works.
79
Barry Warsaw8509df72008-08-21 03:02:47 +000080
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000081What's new in Python 3.0b3?
82===========================
83
Barry Warsaw57c10582008-08-21 02:39:51 +000084*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000085
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000086Core and Builtins
87-----------------
88
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +000089- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
90 arguments.
91
Antoine Pitrou616d2852008-08-19 22:09:34 +000092- Issue #2394: implement more of the memoryview API, with the caveat that
93 only one-dimensional contiguous buffers are supported and exercised right
94 now. Slicing, slice assignment and comparison (equality and inequality)
95 have been added. Also, the tolist() method has been implemented, but only
96 for byte buffers. Endly, the API has been updated to return bytes objects
97 wherever it used to return bytearrays.
98
Antoine Pitrouee58fa42008-08-19 18:22:14 +000099- Issue #3560: clean up the new C PyMemoryView API so that naming is
100 internally consistent; add macros PyMemoryView_GET_BASE() and
101 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
102 without relying on a particular implementation; remove the ill-named
103 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
104
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000105- ctypes function pointers that are COM methods have a boolean True
106 value again.
107
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000108- Issue #1819: function calls with several named parameters are now on
109 average 35% faster (as measured by pybench).
110
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000111- The undocumented C APIs PyUnicode_AsString() and
112 PyUnicode_AsStringAndSize() were made private to the interpreter, in
113 order to be able to refine their interfaces for Python 3.1.
114
115 If you need to access the UTF-8 representation of a Unicode object
116 as bytes string, please use PyUnicode_AsUTF8String() instead.
117
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000118- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
119 to Python 3.0's stricter semantics which allow to avoid successive
120 reallocations of the result string (this also affects str.join()).
121
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000122
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000123Library
124-------
125
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000126- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
127 a build problem on MacOS with CJK locales. It adds four temporary
128 mappings to existing legacy codecs that are virtually compatible
129 with Mac encodings. They will be replaced by codecs correctly
130 implemented in 3.1.
131
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000132- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
133 "global name 'header' is not defined".
134
Antoine Pitroufd036452008-08-19 17:56:33 +0000135- Issue #2834: update the regular expression library to match the unicode
136 standards of py3k. In other words, mixing bytes and unicode strings
137 (be it as pattern, search string or replacement string) raises a TypeError.
138 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
139 and can be disabled by specifying a new re.ASCII flag; as for bytes
140 patterns, ASCII matching is the only option and trying to specify re.UNICODE
141 for such patterns raises a ValueError.
142
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000143- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
144 Code contributed by Matt Giuca. quote() now encodes the input
145 before quoting, unquote() decodes after unquoting. There are
146 new arguments to change the encoding and errors settings.
147 There are also new APIs to skip the encode/decode steps.
148 [un]quote_plus() are also affected.
149
Nick Coghlan36f49522008-08-18 12:31:52 +0000150- Issue #2235: numbers.Number now blocks inheritance of the default id()
151 based hash because that hash mechanism is not correct for numeric types.
152 All concrete numeric types that inherit from Number (rather than just
153 registering with it) must explicitly provide a hash implementation in
154 order for their instances to be hashable.
155
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000156- Issue #2676: in the email package, content-type parsing was hanging on
157 pathological input because of quadratic or exponential behaviour of a
158 regular expression.
159
Antoine Pitrou87695762008-08-14 22:44:29 +0000160- Issue #3476: binary buffered reading through the new "io" library is now
161 thread-safe.
162
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000163- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
164 menu entries were not deleted.
165
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000166- Remove the TarFileCompat class from tarfile.py.
167
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000168- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
169 accepts the same parameters. It just checks that its first argument is an
170 integer.
171
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000172- Issue #3394: zipfile.writestr sets external attributes when passed a
173 file name rather than a ZipInfo instance, so files are extracted with
174 mode 0600 rather than 000 under Unix.
175
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000176- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
177 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000178
Martin v. Löwis371bb502008-08-16 13:02:57 +0000179Extension Modules
180-----------------
181
182- Bug #3542: Support Unicode strings in _msi module.
183
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000184What's new in Python 3.0b2?
185===========================
186
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000187*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000188
189Core and Builtins
190-----------------
191
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000192- Issue #3008: the float type has a new instance method 'float.hex'
193 and a new class method 'float.fromhex' to convert floating-point
194 numbers to and from hexadecimal strings, respectively.
195
Eric Smithd68af8f2008-07-16 00:15:35 +0000196- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
197 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
198
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000199- Issue #3280: like chr(), the "%c" format now accepts unicode code points
200 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
201 "narrow Unicode" builds, the result is a string of 2 code units, forming a
202 UTF-16 surrogate pair.
203
Georg Brandld52429f2008-07-04 15:55:02 +0000204- Issue #3282: str.isprintable() should return False for undefined
205 Unicode characters.
206
Martin v. Löwis029656f2008-06-30 04:06:08 +0000207- Issue #3236: Return small longs from PyLong_FromString.
208
Benjamin Petersone6528212008-07-15 15:32:09 +0000209- Exception tracebacks now support exception chaining.
210
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000211Library
212-------
213
Brett Cannonc2542e92008-07-25 18:19:20 +0000214- Removed the sunaudio module. Use sunau instead.
215
Thomas Heller47bc8092008-08-19 06:38:12 +0000216- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
217 api functions without holding the GIL, which could lead to a fatal
218 error when they failed.
219
220- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
221
Georg Brandl30704ea02008-07-23 15:07:12 +0000222- Removed "ast" function aliases from the parser module.
223
Thomas Heller15383a02008-07-15 19:46:52 +0000224- Issue #3313: Fixed a crash when a failed dlopen() call does not set
225 a valid dlerror() message.
226
Thomas Heller0261e1e2008-07-15 17:25:07 +0000227- Issue #3258: Fixed a crash when a ctypes POINTER type to an
228 incomplete structure was created.
229
Georg Brandl1abcbf82008-07-01 19:28:43 +0000230- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
231 argument now must be a bytes object in any case.
232
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000233- Issue #3145: help("modules whatever") failed when trying to load the source
234 code of every single module of the standard library, including invalid files
235 used in the test suite.
236
Georg Brandlbded4d32008-07-17 18:15:35 +0000237- The gettext library now consistently uses Unicode strings for message ids
238 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000239
Benjamin Petersone6528212008-07-15 15:32:09 +0000240- The traceback module has been expanded to handle chained exceptions.
241
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000242C API
243-----
244
245- Issue #3247: the function Py_FindMethod was removed. Modern types should
246 use the tp_methods slot instead.
247
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000248Tools/Demos
249-----------
250
Georg Brandl336341f2008-07-01 20:21:28 +0000251- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000252
Georg Brandl336341f2008-07-01 20:21:28 +0000253- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000254
255
Brett Cannon0d71ee72008-05-08 18:13:40 +0000256What's new in Python 3.0b1?
257===========================
258
Barry Warsawc1e689e2008-06-19 00:35:43 +0000259*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000260
261Core and Builtins
262-----------------
263
Brett Cannondb734912008-06-27 00:52:15 +0000264- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
265 argument being anything other than a dict or None. Also fixed a bug in error
266 handling when 'message' and 'category' were both set to None, triggering a
267 bus error.
268
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000269- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
270 holds the last (strong) reference to its referent.
271
Georg Brandl559e5d72008-06-11 18:37:52 +0000272- Issue #2630: implement PEP 3138. repr() now returns printable
273 Unicode characters unescaped, to get an ASCII-only representation
274 of an object use ascii().
275
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000276- Issue #1342: On windows, Python could not start when installed in a
277 directory with non-ascii characters.
278
Martin v. Löwis1a214512008-06-11 05:26:20 +0000279- Implement PEP 3121: new module initialization and finalization API.
280
Georg Brandle1b5ac62008-06-04 13:06:58 +0000281- Removed the already-defunct ``-t`` option.
282
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000283- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
284 unmarshalling many code objects, which happens when importing a
285 large .pyc file (~1000 functions).
286
Georg Brandl52b92cc2008-05-25 09:43:03 +0000287- Issue #2963: fix merging oversight that disabled method cache for
288 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000289
Georg Brandlc9b09532008-05-25 09:24:38 +0000290- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
291
Georg Brandl52b92cc2008-05-25 09:43:03 +0000292- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000293
Georg Brandl52b92cc2008-05-25 09:43:03 +0000294- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
295 code now allows any unicode string and returns a utf-8 encoded
296 buffer, just like the "s#" code already does. The "z" code was
297 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000298
Georg Brandl52b92cc2008-05-25 09:43:03 +0000299- Issue #2863: generators now have a ``gen.__name__`` attribute that
300 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
301 ``func.func_code.co_name``. The repr() of a generator now also
302 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000303
304- Issue #2831: enumerate() now has a ``start`` argument.
305
Georg Brandl52b92cc2008-05-25 09:43:03 +0000306- Issue #2801: fix bug in the float.is_integer method where a
307 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000308
Georg Brandl52b92cc2008-05-25 09:43:03 +0000309- The ``--with-toolbox-glue`` option (and the associated
310 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000311
Georg Brandl52b92cc2008-05-25 09:43:03 +0000312- Issue #2196: hasattr() now lets exceptions which do not inherit
313 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
314 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000315
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000316- #3021 Exception reraising sematics have been significantly improved. However,
317 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
318 code anymore.
319
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000320- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
321 removed.
322
Brett Cannon0d71ee72008-05-08 18:13:40 +0000323Extension Modules
324-----------------
325
Georg Brandl38feaf02008-05-25 07:45:51 +0000326- Renamed ``_winreg`` module to ``winreg``.
327
Georg Brandl52b92cc2008-05-25 09:43:03 +0000328- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
329 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000330
331- Support for Windows 9x has been removed from the winsound module.
332
Georg Brandl52b92cc2008-05-25 09:43:03 +0000333- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000334
Brett Cannon0d71ee72008-05-08 18:13:40 +0000335Library
336-------
337
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000338- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
339 symtable.Symbol have been removed.
340
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000341- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
342
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000343- a new ``urllib`` package was created. It consists of code from
344 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
345 modules have all been removed. The new package has five submodules:
346 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
347 ``urllib.error``, and ``urllib.robotparser``. The
348 ``urllib.request.urlopen()`` function uses the url opener from
349 ``urllib2``. (Note that the unittests have not been renamed for the
350 beta, but they will be renamed in the future.)
351
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000352- rfc822 has been removed in favor of the email package.
353
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000354- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000355
Barry Warsawf5019422008-06-12 02:42:00 +0000356- Patch #2849: Remove use of rfc822 module from standard library.
357
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000358- Added C optimized implementation of io.StringIO.
359
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000360- The ``pickle`` module is now automatically use an optimized C
361 implementation of Pickler and Unpickler when available. The
362 ``cPickle`` module is no longer needed.
363
Georg Brandl877b10a2008-06-01 21:25:55 +0000364- Removed the ``htmllib`` and ``sgmllib`` modules.
365
Georg Brandl61013952008-05-28 15:56:30 +0000366- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
367 been removed from ``http.cookies``.
368
Brett Cannona23810f2008-05-26 19:04:21 +0000369- The ``commands`` module has been removed. Its getoutput() and
370 getstatusoutput() functions have been moved to the ``subprocess`` module.
371
Georg Brandl3d5c4252008-05-26 18:03:26 +0000372- The ``http`` package was created; it contains the old ``httplib``
373 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
374 as ``http.cookiejar``, and the content of the three ``HTTPServer``
375 modules as ``http.server``.
376
Georg Brandl38eceaa2008-05-26 11:14:17 +0000377- The ``xmlrpc`` package was created; it contains the old
378 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
379 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000380 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000381
382- The ``dbm`` package was created, containing the old modules
383 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
384 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
385 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
386 as submodules.
387
Georg Brandl52b92cc2008-05-25 09:43:03 +0000388- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000389
Georg Brandl52b92cc2008-05-25 09:43:03 +0000390- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000391
Georg Brandl52b92cc2008-05-25 09:43:03 +0000392- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000393
Georg Brandl52b92cc2008-05-25 09:43:03 +0000394- Issue #2250: Exceptions raised during evaluation of names in
395 rlcompleter's ``Completer.complete()`` method are now caught and
396 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000397
Georg Brandl52b92cc2008-05-25 09:43:03 +0000398- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
399 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000400
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000401- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
402 large to fit in a C long. ldexp(x, n) now returns a zero (with
403 suitable sign) if n is large and negative; previously, it raised
404 OverflowError.
405
Georg Brandl52b92cc2008-05-25 09:43:03 +0000406- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000407
Georg Brandl52b92cc2008-05-25 09:43:03 +0000408- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000409
Georg Brandl52b92cc2008-05-25 09:43:03 +0000410- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000411
Georg Brandl52b92cc2008-05-25 09:43:03 +0000412- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000413
Georg Brandl52b92cc2008-05-25 09:43:03 +0000414- Fixed the ``__all__`` setting on ``collections`` to include
415 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000416
Brett Cannoncf3520c2008-05-11 22:47:58 +0000417- The sre module has been removed.
418
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000419- The Queue module has been renamed to queue.
420
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000421- The copy_reg module has been renamed to copyreg.
422
Brett Cannond8b61ee2008-05-11 03:00:26 +0000423- The mhlib module has been removed.
424
Brett Cannonbd474422008-05-10 22:42:14 +0000425- The ihooks module has been removed.
426
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000427- The fpformat module has been removed.
428
Brett Cannonf4fd9932008-05-10 21:11:46 +0000429- The dircache module has been removed.
430
Brett Cannond175b4c2008-05-10 03:19:54 +0000431- The Canvas module has been removed.
432
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000433- The Decimal module gained the magic methods __round__, __ceil__,
434 __floor__ and __trunc__, to give support for round, math.ceil,
435 math.floor and math.trunc.
436
Brett Cannon900ee3a2008-05-08 20:31:11 +0000437- The user module has been removed.
438
Brett Cannon34afe872008-05-08 20:31:44 +0000439- The mutex module has been removed.
440
Brett Cannon0d71ee72008-05-08 18:13:40 +0000441- The imputil module has been removed.
442
Georg Brandl52b92cc2008-05-25 09:43:03 +0000443- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000444
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000445- pdb gained the "until" command.
446
Georg Brandl52b92cc2008-05-25 09:43:03 +0000447- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000448
Georg Brandl32de7af2008-08-18 23:07:41 +0000449- The threading module API was renamed to be PEP 8 compliant. The
450 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000451
Georg Brandl294d5a92008-06-01 19:25:32 +0000452Tools/Demos
453-----------
454
455- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000456
Brett Cannon0d71ee72008-05-08 18:13:40 +0000457Build
458-----
459
460
Barry Warsaw66079cd2008-04-04 01:36:36 +0000461What's New in Python 3.0a5?
462===========================
463
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000464*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000465
466Core and Builtins
467-----------------
468
Georg Brandl52b92cc2008-05-25 09:43:03 +0000469- Fixed misbehaviour of PyLong_FromSsize_t on systems where
470 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000471
Georg Brandl52b92cc2008-05-25 09:43:03 +0000472- Issue #2221: Corrected a SystemError "error return without exception
473 set", when the code executed by exec() raises an exception, and
474 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000475
Georg Brandl52b92cc2008-05-25 09:43:03 +0000476- Bug #2565: The repr() of type objects now calls them 'class', not
477 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000478
Martin v. Löwis790465f2008-04-05 20:41:37 +0000479- The command line processing was converted to pass Unicode strings
480 through as unmodified as possible; as a consequence, the C API
481 related to command line arguments was changed to use wchar_t.
482
Georg Brandl52b92cc2008-05-25 09:43:03 +0000483- All backslashes in raw strings are interpreted literally. This
484 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000485
Barry Warsaw66079cd2008-04-04 01:36:36 +0000486Extension Modules
487-----------------
488
489Library
490-------
491
Georg Brandl52b92cc2008-05-25 09:43:03 +0000492- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000493
Thomas Hellere106dc32008-04-24 18:39:36 +0000494- Issue #2682: ctypes callback functions now longer contain a cyclic
495 reference to themselves.
496
Georg Brandl52b92cc2008-05-25 09:43:03 +0000497- Issue #2058: Remove the buf attribute and add __slots__ to the
498 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000499
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000500- Bug #2606: Avoid calling .sort() on a dict_keys object.
501
Thomas Hellerbff533b2008-04-04 19:53:14 +0000502- The bundled libffi copy is now in sync with the recently released
503 libffi3.0.5 version, apart from some small changes to
504 Modules/_ctypes/libffi/configure.ac.
505
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000506Build
507-----
508
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000509- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
510
Guido van Rossumdc21db32008-04-07 18:37:41 +0000511- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000512 accidentally overwriting a Python 2.x installation. Use "make
513 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000514
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000515- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
516 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000517
Georg Brandl52b92cc2008-05-25 09:43:03 +0000518
Barry Warsawa9d499d2008-03-01 18:38:07 +0000519What's New in Python 3.0a4?
520===========================
521
Barry Warsawbb5cd082008-04-02 23:33:27 +0000522*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000523
Martin v. Löwis25931462008-03-17 20:43:42 +0000524Core and Builtins
525-----------------
526
527- Bug #2301: Don't try decoding the source code into the original
528 encoding for syntax errors.
529
Martin v. Löwis92fab752008-03-08 10:40:41 +0000530Extension Modules
531-----------------
532
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000533- The dl module was removed, use the ctypes module instead.
534
Martin v. Löwis92fab752008-03-08 10:40:41 +0000535- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000536
Martin v. Löwis071ef772008-03-08 11:24:24 +0000537Library
538-------
539
Georg Brandl52b92cc2008-05-25 09:43:03 +0000540- The class distutils.commands.build_py.build_py_2to3 can be used as a
541 build_py replacement to automatically run 2to3 on modules that are
542 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000543
Guido van Rossumf4169812008-03-17 22:56:06 +0000544- A new pickle protocol (protocol 3) is added with explicit support
545 for bytes. This is the default protocol. It intentionally cannot
546 be unpickled by Python 2.x.
547
548- When a pickle written by Python 2.x contains an (8-bit) str
549 instance, this is now decoded to a (Unicode) str instance. The
550 encoding used to do this defaults to ASCII, but can be overridden
551 via two new keyword arguments to the Unpickler class. Previously
552 this would create bytes instances, which is usually wrong: str
553 instances are often used to pickle attribute names etc., and text is
554 more common than binary data anyway.
555
Martin v. Löwis071ef772008-03-08 11:24:24 +0000556- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000557 system doesn't support CODESET and LANG isn't set or doesn't allow
558 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000559
Georg Brandl52b92cc2008-05-25 09:43:03 +0000560- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
561 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000562
Georg Brandl52b92cc2008-05-25 09:43:03 +0000563- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
564 has been renamed tokenize and now works with bytes rather than
565 strings. A new detect_encoding function has been added for
566 determining source file encoding according to PEP-0263. Token
567 sequences returned by tokenize always start with an ENCODING token
568 which specifies the encoding used to decode the file. This token is
569 used to encode the output of untokenize back to bytes.
570
Barry Warsawa9d499d2008-03-01 18:38:07 +0000571
Christian Heimesbc873412007-12-08 22:11:32 +0000572What's New in Python 3.0a3?
573===========================
574
Barry Warsaw659fc422008-03-01 17:45:23 +0000575*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000576
577Core and Builtins
578-----------------
579
Georg Brandl52b92cc2008-05-25 09:43:03 +0000580- Issue #2282: io.TextIOWrapper was not overriding seekable() from
581 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000582
Georg Brandl52b92cc2008-05-25 09:43:03 +0000583- Issue #2115: Important speedup in setting __slot__ attributes. Also
584 prevent a possible crash: an Abstract Base Class would try to access
585 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000586
Georg Brandl52b92cc2008-05-25 09:43:03 +0000587- Fixed repr() and str() of complex numbers with infinity or nan as
588 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000589
Georg Brandl52b92cc2008-05-25 09:43:03 +0000590- Clear all free list during a gc.collect() of the highest generation
591 in order to allow pymalloc to free more arenas. Python may give back
592 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000593
Georg Brandl52b92cc2008-05-25 09:43:03 +0000594- Issue #2045: Fix an infinite recursion triggered when printing a
595 subclass of collections.defaultdict, if its default_factory is set
596 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000597
598- Fixed a minor memory leak in dictobject.c. The content of the free
599 list was not freed on interpreter shutdown.
600
Georg Brandl52b92cc2008-05-25 09:43:03 +0000601- Limit free list of method and builtin function objects to 256
602 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000603
Georg Brandl52b92cc2008-05-25 09:43:03 +0000604- Patch #1953: Added ``sys._compact_freelists()`` and the C API
605 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000606 to compact the internal free lists of pre-allocted ints and floats.
607
608- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000609 Python expected the return type int but the fork familie returns
610 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000611
Georg Brandl52b92cc2008-05-25 09:43:03 +0000612- Issue #1678380: Fix a bug that identifies 0j and -0j when they
613 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000614
Georg Brandl52b92cc2008-05-25 09:43:03 +0000615- Issue #2025: Added tuple.count() and tuple.index() methods to comply
616 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000617
Georg Brandl52b92cc2008-05-25 09:43:03 +0000618- Fixed multiple reinitialization of the Python interpreter. The small
619 int list in longobject.c has caused a seg fault during the third
620 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000621
Georg Brandl52b92cc2008-05-25 09:43:03 +0000622- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000623
Georg Brandl52b92cc2008-05-25 09:43:03 +0000624- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000625
Georg Brandl52b92cc2008-05-25 09:43:03 +0000626- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000627
Georg Brandl52b92cc2008-05-25 09:43:03 +0000628- map() no longer accepts None for the first argument. Use zip()
629 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000630
Facundo Batista2336bdd2008-01-19 19:12:01 +0000631- Issue #1769: Now int("- 1") is not allowed any more.
632
Georg Brandl52b92cc2008-05-25 09:43:03 +0000633- Object/longobject.c: long(float('nan')) raises an OverflowError
634 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000635
Georg Brandl52b92cc2008-05-25 09:43:03 +0000636- Issue #1762972: __file__ points to the source file instead of the
637 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000638
Guido van Rossumab078dd2008-01-06 00:09:11 +0000639- Issue #1393: object_richcompare() returns NotImplemented instead of
640 False if the objects aren't equal, to give the other side a chance.
641
Guido van Rossume239b002008-01-06 00:44:20 +0000642- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000643
Georg Brandl52b92cc2008-05-25 09:43:03 +0000644- Improve some exception messages when Windows fails to load an
645 extension module. Now we get for example '%1 is not a valid Win32
646 application' instead of 'error code 193'. Also use Unicode strings
647 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000648
Georg Brandl52b92cc2008-05-25 09:43:03 +0000649- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
650 Python C API has gained a new type *PyInstanceMethod_Type* and the
651 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
652 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000653
Georg Brandl52b92cc2008-05-25 09:43:03 +0000654- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
655 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
656 are now enough to print the corresponding list of objects considered
657 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000658
Georg Brandl52b92cc2008-05-25 09:43:03 +0000659- Issue #1573: Improper use of the keyword-only syntax makes the
660 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000661
Georg Brandl52b92cc2008-05-25 09:43:03 +0000662- Issue #1564: The set implementation should special-case PyUnicode
663 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000664
Guido van Rossumea6775b2008-02-21 20:16:31 +0000665- Patch #1031213: Decode source line in SyntaxErrors back to its
666 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000667
Christian Heimes09aaa882008-02-23 15:01:06 +0000668- inspect.getsource() includes the decorators again.
669
Guido van Rossumea6775b2008-02-21 20:16:31 +0000670- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
671 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000672
Georg Brandl52b92cc2008-05-25 09:43:03 +0000673- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
674 the first chunk fed to the decoder started with a BOM, but was
675 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000676
Christian Heimesbc873412007-12-08 22:11:32 +0000677Extension Modules
678-----------------
679
Georg Brandl52b92cc2008-05-25 09:43:03 +0000680- Code for itertools ifilter(), imap(), and izip() moved to bultins
681 and renamed to filter(), map(), and zip(). Also, renamed
682 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000683
Georg Brandl52b92cc2008-05-25 09:43:03 +0000684- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000685
Georg Brandl52b92cc2008-05-25 09:43:03 +0000686- Bug #2111: mmap segfaults when trying to write a block opened with
687 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000688
Georg Brandl52b92cc2008-05-25 09:43:03 +0000689- Issue #2063: correct order of utime and stime in os.times() result
690 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000691
Christian Heimesbc873412007-12-08 22:11:32 +0000692Library
693-------
694
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000695- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000696
Georg Brandl52b92cc2008-05-25 09:43:03 +0000697- Created new UserDict class in collections module. This one inherits
698 from and complies with the MutableMapping ABC. Also, moved
699 UserString and UserList to the collections module. The
700 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000701
Guido van Rossumea6775b2008-02-21 20:16:31 +0000702- Removed UserDict.DictMixin. Replaced all its uses with
703 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000704
Guido van Rossume239b002008-01-06 00:44:20 +0000705- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000706
Guido van Rossume239b002008-01-06 00:44:20 +0000707- Issue #1585: IDLE uses non-existent xrange() function.
708
709- Issue #1578: Problems in win_getpass.
710
Georg Brandl52d168a2008-01-07 18:10:24 +0000711Build
712-----
713
Georg Brandl52b92cc2008-05-25 09:43:03 +0000714- Renamed --enable-unicode configure flag to --with-wide-unicode,
715 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000716
Guido van Rossume239b002008-01-06 00:44:20 +0000717C API
718-----
719
720- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
721 Py_TYPE and Py_REFCNT.
722
Georg Brandl52b92cc2008-05-25 09:43:03 +0000723- New API PyImport_ImportModuleNoBlock(), works like
724 PyImport_ImportModule() but won't block on the import lock
725 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000726
Christian Heimesbc873412007-12-08 22:11:32 +0000727
Fred Drake0e474a82007-10-11 18:01:43 +0000728What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000729===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000730
Guido van Rossum99533a92007-12-06 05:07:41 +0000731*Release date: 07-Dec-2007*
732
733(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000734
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000735Core and Builtins
736-----------------
737
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000738- str8 now has the same construction signature as bytes.
739
Georg Brandl52b92cc2008-05-25 09:43:03 +0000740- Comparisons between str and str8 now return False/True for ==/!=.
741 sqlite3 returns str8 when recreating on object from it's __conform__
742 value. The struct module returns str8 for all string-related
743 formats. This was true before this change, but becomes more
744 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000745
Georg Brandl52b92cc2008-05-25 09:43:03 +0000746- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
747 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000748
749- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
750
751- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000752 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000753 `PyUnicode_DecodeFSDefault(char*)` was added.
754
Georg Brandl52b92cc2008-05-25 09:43:03 +0000755- io.open() and _fileio.FileIO have grown a new argument closefd. A
756 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000757
Georg Brandl52b92cc2008-05-25 09:43:03 +0000758- Added a new option -b to issues warnings (-bb for errors) about
759 certain operations between bytes/buffer and str like str(b'') and
760 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000761
Georg Brandl52b92cc2008-05-25 09:43:03 +0000762- The standards streams sys.stdin, stdout and stderr may be None when
763 the when the C runtime library returns an invalid file descriptor
764 for the streams (fileno(stdin) < 0). For now this happens only for
765 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000766
Christian Heimesbce52be2007-11-17 19:08:41 +0000767- Added PCbuild9 directory for VS 2008.
768
Georg Brandl52b92cc2008-05-25 09:43:03 +0000769- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
770 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000771
Georg Brandl52b92cc2008-05-25 09:43:03 +0000772- Unbound methods are gone for good. ClassObject.method returns an
773 ordinary function object, instance.method still returns a bound
774 method object. The API of bound methods is cleaned up, too. The
775 im_class attribute is removed and im_func + im_self are renamed to
776 __func__ and __self__. The factory PyMethod_New takes only func and
777 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000778
Georg Brandl52b92cc2008-05-25 09:43:03 +0000779- intobject.h is no longer included by Python.h. The remains were
780 moved to longobject.h. It still exists to define several aliases
781 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000782
Christian Heimesa37d4c62007-12-04 23:02:19 +0000783- Removed sys.maxint, use sys.maxsize instead.
784
Fred Drake0e474a82007-10-11 18:01:43 +0000785Extension Modules
786-----------------
787
788- The `hotshot` profiler has been removed; use `cProfile` instead.
789
Brett Cannone9fd2312007-10-12 19:18:19 +0000790Library
791-------
792
Georg Brandl52b92cc2008-05-25 09:43:03 +0000793- When loading an external file using testfile(), the passed-in
794 encoding argument was being ignored if __loader__ is defined and
795 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000796
Georg Brandl52b92cc2008-05-25 09:43:03 +0000797- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
798 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000799
Christian Heimesc9543e42007-11-28 08:28:28 +0000800- Removed the 'new' module.
801
Georg Brandl52b92cc2008-05-25 09:43:03 +0000802- Removed all types from the 'types' module that are easily accessable
803 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000804
Georg Brandl52d168a2008-01-07 18:10:24 +0000805
Guido van Rossum4405cf32007-08-30 17:16:55 +0000806What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000807==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000808
Guido van Rossum4405cf32007-08-30 17:16:55 +0000809*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000810
811Core and Builtins
812-----------------
813
Martin v. Löwis47383402007-08-15 07:32:56 +0000814- PEP 3131: Support non-ASCII identifiers.
815
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000816- PEP 3120: Change default encoding to UTF-8.
817
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000818- PEP 3123: Use proper C inheritance for PyObject.
819
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000820- Removed the __oct__ and __hex__ special methods and added a bin()
821 builtin function.
822
Georg Brandl52b92cc2008-05-25 09:43:03 +0000823- PEP 3127: octal literals now start with "0o". Old-style octal
824 literals are invalid. There are binary literals with a prefix of
825 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000826
Guido van Rossume7ba4952007-06-06 23:52:48 +0000827- None, True, False are now keywords.
828
Guido van Rossum29478ef2007-05-29 00:39:44 +0000829- PEP 3119: isinstance() and issubclass() can be overridden.
830
Guido van Rossumebe3e162007-05-17 18:20:34 +0000831- Remove BaseException.message.
832
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000833- Remove tuple parameter unpacking (PEP 3113).
834
Georg Brandl52b92cc2008-05-25 09:43:03 +0000835- Remove the f_restricted attribute from frames. This naturally leads
836 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000837
Georg Brandl52b92cc2008-05-25 09:43:03 +0000838- PEP 3132 was accepted. That means that you can do ``a, *b =
839 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000840
Georg Brandl52b92cc2008-05-25 09:43:03 +0000841- range() now returns an iterator rather than a list. Floats are not
842 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000843
Nick Coghlan650f0d02007-04-15 12:05:43 +0000844- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000845 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000846
Guido van Rossume27dc722007-03-27 22:37:34 +0000847- By default, != returns the opposite of ==, unless the latter returns
848 NotImplemented.
849
Georg Brandl52b92cc2008-05-25 09:43:03 +0000850- Patch #1680961: sys.exitfunc has been removed and replaced with a
851 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000852
Georg Brandl801dd732007-03-18 20:18:31 +0000853- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000854 keyword arg in the class statement, which can now use the full
855 syntax of a parameter list. Also, the metaclass can implement a
856 __prepare__ function which will be called to create the dictionary
857 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000858
Georg Brandl428f0642007-03-18 18:35:15 +0000859- The long-deprecated argument "pend" of PyFloat_FromString() has been
860 removed.
861
Georg Brandle32b4222007-03-10 22:13:27 +0000862- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000863 its argument, if it exists. If not, it will work like before. This
864 allows customizing the output of dir() in the presence of a
865 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000866
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000867- Removed support for __members__ and __methods__.
868
Georg Brandle32b4222007-03-10 22:13:27 +0000869- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000870
Georg Brandle32b4222007-03-10 22:13:27 +0000871- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000872 functionality formerly known as raw_input(); the name raw_input() is
873 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000874
Georg Brandl52b92cc2008-05-25 09:43:03 +0000875- Classes listed in an 'except' clause must inherit from
876 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000877
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000878- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000879 and .keys(), .items(), .values() return dict views, which behave
880 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000881
Guido van Rossum8b545362007-02-09 23:52:14 +0000882- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000883 'softspace' attribute of files is now gone (since print() doesn't
884 use it). A side effect of this change is that you can get
885 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000886
887 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000888 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000889
890 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000891
Brett Cannon398db8b2007-01-29 23:44:37 +0000892- PEP 3102: keyword-only arguments.
893
Georg Brandl52b92cc2008-05-25 09:43:03 +0000894- Int/Long unification is complete. The 'long' built-in type and
895 literals with trailing 'L' or 'l' have been removed. Performance
896 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000897
898- 'except E, V' must now be spelled as 'except E as V' and deletes V
899 at the end of the except clause; V must be a simple name.
900
Neal Norwitzc1505362006-12-28 06:47:50 +0000901- Added function annotations per PEP 3107.
902
Georg Brandl52b92cc2008-05-25 09:43:03 +0000903- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000904
905 >>> def f(x):
906 ... def inc():
907 ... nonlocal x
908 ... x += 1
909 ... return x
910 ... return inc
911 ...
912 >>> inc = f(0)
913 >>> inc()
914 1
915 >>> inc()
916 2
917
Georg Brandl66a796e2006-12-19 20:50:34 +0000918- Moved intern() to sys.intern().
919
920- exec is now a function.
921
922- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000923
Neal Norwitz4886cc32006-08-21 17:06:07 +0000924- Classic classes are a thing of the past. All classes are new style.
925
926- Exceptions *must* derive from BaseException.
927
928- Integer division always returns a float. The -Q option is no more.
929 All the following are gone:
930 * PyNumber_Divide and PyNumber_InPlaceDivide
931 * __div__, __rdiv__, and __idiv__
932 * nb_divide, nb_inplace_divide
933 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
934 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
935 if we want to re-use __div__ and friends. If we do, it will make
936 it harder to write code for both 2.x and 3.x.)
937
938- 'as' and 'with' are keywords.
939
940- Absolute import is the default behavior for 'import foo' etc.
941
Georg Brandl52b92cc2008-05-25 09:43:03 +0000942- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000943
Georg Brandl52b92cc2008-05-25 09:43:03 +0000944- Removed these Python builtins: apply(), callable(), coerce(),
945 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000946
Georg Brandl52b92cc2008-05-25 09:43:03 +0000947- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000948
Georg Brandl52b92cc2008-05-25 09:43:03 +0000949- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000950
951- Remove C API support for restricted execution.
952
Guido van Rossumcf1be882007-08-30 22:07:17 +0000953- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000954 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000955 sequences of unequal length -- it now stops after the shortest one
956 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000957
Georg Brandl52b92cc2008-05-25 09:43:03 +0000958- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000959
960- Added class decorators per PEP 3129.
961
962
963Extension Modules
964-----------------
965
Georg Brandl52b92cc2008-05-25 09:43:03 +0000966- Removed the imageop module. Obsolete long with its unit tests
967 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000968
Georg Brandl52b92cc2008-05-25 09:43:03 +0000969- Removed these attributes from the operator module: div, idiv,
970 __div__, __idiv__, isCallable, sequenceIncludes.
971
972- Removed these attributes from the sys module: exc_clear(), exc_type,
973 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000974
975
976Library
977-------
978
Georg Brandl52b92cc2008-05-25 09:43:03 +0000979- Removed the compiler package. Use of the _ast module and (an
980 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000981
Georg Brandl52b92cc2008-05-25 09:43:03 +0000982- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
983 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
984 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000985
Georg Brandl52b92cc2008-05-25 09:43:03 +0000986- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000987
Georg Brandl52b92cc2008-05-25 09:43:03 +0000988- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
989 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
990 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000991
Georg Brandl52b92cc2008-05-25 09:43:03 +0000992- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000993
Georg Brandl52b92cc2008-05-25 09:43:03 +0000994- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000995 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000996
Georg Brandl52b92cc2008-05-25 09:43:03 +0000997- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000998
Georg Brandl52b92cc2008-05-25 09:43:03 +0000999- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001000
1001- Patch #1680961: atexit has been reimplemented in C.
1002
Walter Dörwald41980ca2007-08-16 21:55:45 +00001003- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1004
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001005Build
1006-----
1007
1008C API
1009-----
1010
Georg Brandl52b92cc2008-05-25 09:43:03 +00001011- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001012
Georg Brandl52b92cc2008-05-25 09:43:03 +00001013- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1014 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001015
Georg Brandl52b92cc2008-05-25 09:43:03 +00001016- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001017
Georg Brandl52b92cc2008-05-25 09:43:03 +00001018- Removed these macros: staticforward, statichere, PyArg_GetInt,
1019 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001020
Georg Brandl52b92cc2008-05-25 09:43:03 +00001021- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1022 intintobjargproc, getreadbufferproc, getwritebufferproc,
1023 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001024
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001025Tests
1026-----
1027
Brett Cannone7a30f72008-03-03 03:36:27 +00001028- Removed test.testall as test.regrtest replaces it.
1029
Brett Cannonced04e02005-02-13 22:53:22 +00001030Documentation
1031-------------
1032
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001033Mac
1034---
1035
Georg Brandl52b92cc2008-05-25 09:43:03 +00001036- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001037
Guido van Rossum845702c2007-08-30 18:44:53 +00001038Platforms
1039---------
1040
1041- Support for BeOS and AtheOS was removed (according to PEP 11).
1042
1043- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1044
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001045Tools/Demos
1046-----------
1047
Georg Brandl52b92cc2008-05-25 09:43:03 +00001048
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001049**(For information about older versions, consult the HISTORY file.)**