blob: 5290a83bce8a3abe081a81941dc6ecb4fdfab1b6 [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
Brett Cannonec92e182008-09-02 02:46:59 +000063- Issue 3602: As part of the merge of r66135, make the parameters on
64 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
65
Benjamin Petersonb3085c92008-09-01 23:09:31 +000066- The deprecation warnings for the camelCase threading API names were removed.
67
Benjamin Peterson6784eb72008-08-23 20:32:27 +000068Extension Modules
69-----------------
70
71- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
72 exploitation of poor argument checking.
73
Jesus Cea6ba33292008-08-31 14:12:11 +000074- bsddb code updated to version 4.7.3pre2. This code is the same than
75 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
76 The Python code is automatically translated using "2to3". Please, do not
77 update this code in Python 3.0 by hand. Update the 2.6 one and then
78 do "2to3".
79
Neal Norwitz8f2f22a2008-08-24 20:59:23 +000080Tools/Demos
81-----------
82
83- Fix Misc/gdbinit so it works.
84
Barry Warsaw8509df72008-08-21 03:02:47 +000085
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000086What's new in Python 3.0b3?
87===========================
88
Barry Warsaw57c10582008-08-21 02:39:51 +000089*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000090
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000091Core and Builtins
92-----------------
93
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +000094- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
95 arguments.
96
Antoine Pitrou616d2852008-08-19 22:09:34 +000097- Issue #2394: implement more of the memoryview API, with the caveat that
98 only one-dimensional contiguous buffers are supported and exercised right
99 now. Slicing, slice assignment and comparison (equality and inequality)
100 have been added. Also, the tolist() method has been implemented, but only
101 for byte buffers. Endly, the API has been updated to return bytes objects
102 wherever it used to return bytearrays.
103
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000104- Issue #3560: clean up the new C PyMemoryView API so that naming is
105 internally consistent; add macros PyMemoryView_GET_BASE() and
106 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
107 without relying on a particular implementation; remove the ill-named
108 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
109
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000110- ctypes function pointers that are COM methods have a boolean True
111 value again.
112
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000113- Issue #1819: function calls with several named parameters are now on
114 average 35% faster (as measured by pybench).
115
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000116- The undocumented C APIs PyUnicode_AsString() and
117 PyUnicode_AsStringAndSize() were made private to the interpreter, in
118 order to be able to refine their interfaces for Python 3.1.
119
120 If you need to access the UTF-8 representation of a Unicode object
121 as bytes string, please use PyUnicode_AsUTF8String() instead.
122
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000123- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
124 to Python 3.0's stricter semantics which allow to avoid successive
125 reallocations of the result string (this also affects str.join()).
126
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000127
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000128Library
129-------
130
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000131- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
132 a build problem on MacOS with CJK locales. It adds four temporary
133 mappings to existing legacy codecs that are virtually compatible
134 with Mac encodings. They will be replaced by codecs correctly
135 implemented in 3.1.
136
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000137- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
138 "global name 'header' is not defined".
139
Antoine Pitroufd036452008-08-19 17:56:33 +0000140- Issue #2834: update the regular expression library to match the unicode
141 standards of py3k. In other words, mixing bytes and unicode strings
142 (be it as pattern, search string or replacement string) raises a TypeError.
143 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
144 and can be disabled by specifying a new re.ASCII flag; as for bytes
145 patterns, ASCII matching is the only option and trying to specify re.UNICODE
146 for such patterns raises a ValueError.
147
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000148- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
149 Code contributed by Matt Giuca. quote() now encodes the input
150 before quoting, unquote() decodes after unquoting. There are
151 new arguments to change the encoding and errors settings.
152 There are also new APIs to skip the encode/decode steps.
153 [un]quote_plus() are also affected.
154
Nick Coghlan36f49522008-08-18 12:31:52 +0000155- Issue #2235: numbers.Number now blocks inheritance of the default id()
156 based hash because that hash mechanism is not correct for numeric types.
157 All concrete numeric types that inherit from Number (rather than just
158 registering with it) must explicitly provide a hash implementation in
159 order for their instances to be hashable.
160
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000161- Issue #2676: in the email package, content-type parsing was hanging on
162 pathological input because of quadratic or exponential behaviour of a
163 regular expression.
164
Antoine Pitrou87695762008-08-14 22:44:29 +0000165- Issue #3476: binary buffered reading through the new "io" library is now
166 thread-safe.
167
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000168- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
169 menu entries were not deleted.
170
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000171- Remove the TarFileCompat class from tarfile.py.
172
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000173- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
174 accepts the same parameters. It just checks that its first argument is an
175 integer.
176
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000177- Issue #3394: zipfile.writestr sets external attributes when passed a
178 file name rather than a ZipInfo instance, so files are extracted with
179 mode 0600 rather than 000 under Unix.
180
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000181- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
182 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000183
Martin v. Löwis371bb502008-08-16 13:02:57 +0000184Extension Modules
185-----------------
186
187- Bug #3542: Support Unicode strings in _msi module.
188
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000189What's new in Python 3.0b2?
190===========================
191
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000192*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000193
194Core and Builtins
195-----------------
196
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000197- Issue #3008: the float type has a new instance method 'float.hex'
198 and a new class method 'float.fromhex' to convert floating-point
199 numbers to and from hexadecimal strings, respectively.
200
Eric Smithd68af8f2008-07-16 00:15:35 +0000201- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
202 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
203
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000204- Issue #3280: like chr(), the "%c" format now accepts unicode code points
205 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
206 "narrow Unicode" builds, the result is a string of 2 code units, forming a
207 UTF-16 surrogate pair.
208
Georg Brandld52429f2008-07-04 15:55:02 +0000209- Issue #3282: str.isprintable() should return False for undefined
210 Unicode characters.
211
Martin v. Löwis029656f2008-06-30 04:06:08 +0000212- Issue #3236: Return small longs from PyLong_FromString.
213
Benjamin Petersone6528212008-07-15 15:32:09 +0000214- Exception tracebacks now support exception chaining.
215
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000216Library
217-------
218
Brett Cannonc2542e92008-07-25 18:19:20 +0000219- Removed the sunaudio module. Use sunau instead.
220
Thomas Heller47bc8092008-08-19 06:38:12 +0000221- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
222 api functions without holding the GIL, which could lead to a fatal
223 error when they failed.
224
225- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
226
Georg Brandl30704ea02008-07-23 15:07:12 +0000227- Removed "ast" function aliases from the parser module.
228
Thomas Heller15383a02008-07-15 19:46:52 +0000229- Issue #3313: Fixed a crash when a failed dlopen() call does not set
230 a valid dlerror() message.
231
Thomas Heller0261e1e2008-07-15 17:25:07 +0000232- Issue #3258: Fixed a crash when a ctypes POINTER type to an
233 incomplete structure was created.
234
Georg Brandl1abcbf82008-07-01 19:28:43 +0000235- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
236 argument now must be a bytes object in any case.
237
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000238- Issue #3145: help("modules whatever") failed when trying to load the source
239 code of every single module of the standard library, including invalid files
240 used in the test suite.
241
Georg Brandlbded4d32008-07-17 18:15:35 +0000242- The gettext library now consistently uses Unicode strings for message ids
243 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000244
Benjamin Petersone6528212008-07-15 15:32:09 +0000245- The traceback module has been expanded to handle chained exceptions.
246
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000247C API
248-----
249
250- Issue #3247: the function Py_FindMethod was removed. Modern types should
251 use the tp_methods slot instead.
252
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000253Tools/Demos
254-----------
255
Georg Brandl336341f2008-07-01 20:21:28 +0000256- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000257
Georg Brandl336341f2008-07-01 20:21:28 +0000258- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000259
260
Brett Cannon0d71ee72008-05-08 18:13:40 +0000261What's new in Python 3.0b1?
262===========================
263
Barry Warsawc1e689e2008-06-19 00:35:43 +0000264*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000265
266Core and Builtins
267-----------------
268
Brett Cannondb734912008-06-27 00:52:15 +0000269- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
270 argument being anything other than a dict or None. Also fixed a bug in error
271 handling when 'message' and 'category' were both set to None, triggering a
272 bus error.
273
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000274- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
275 holds the last (strong) reference to its referent.
276
Georg Brandl559e5d72008-06-11 18:37:52 +0000277- Issue #2630: implement PEP 3138. repr() now returns printable
278 Unicode characters unescaped, to get an ASCII-only representation
279 of an object use ascii().
280
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000281- Issue #1342: On windows, Python could not start when installed in a
282 directory with non-ascii characters.
283
Martin v. Löwis1a214512008-06-11 05:26:20 +0000284- Implement PEP 3121: new module initialization and finalization API.
285
Georg Brandle1b5ac62008-06-04 13:06:58 +0000286- Removed the already-defunct ``-t`` option.
287
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000288- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
289 unmarshalling many code objects, which happens when importing a
290 large .pyc file (~1000 functions).
291
Georg Brandl52b92cc2008-05-25 09:43:03 +0000292- Issue #2963: fix merging oversight that disabled method cache for
293 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000294
Georg Brandlc9b09532008-05-25 09:24:38 +0000295- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
296
Georg Brandl52b92cc2008-05-25 09:43:03 +0000297- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000298
Georg Brandl52b92cc2008-05-25 09:43:03 +0000299- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
300 code now allows any unicode string and returns a utf-8 encoded
301 buffer, just like the "s#" code already does. The "z" code was
302 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000303
Georg Brandl52b92cc2008-05-25 09:43:03 +0000304- Issue #2863: generators now have a ``gen.__name__`` attribute that
305 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
306 ``func.func_code.co_name``. The repr() of a generator now also
307 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000308
309- Issue #2831: enumerate() now has a ``start`` argument.
310
Georg Brandl52b92cc2008-05-25 09:43:03 +0000311- Issue #2801: fix bug in the float.is_integer method where a
312 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000313
Georg Brandl52b92cc2008-05-25 09:43:03 +0000314- The ``--with-toolbox-glue`` option (and the associated
315 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000316
Georg Brandl52b92cc2008-05-25 09:43:03 +0000317- Issue #2196: hasattr() now lets exceptions which do not inherit
318 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
319 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000320
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000321- #3021 Exception reraising sematics have been significantly improved. However,
322 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
323 code anymore.
324
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000325- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
326 removed.
327
Brett Cannon0d71ee72008-05-08 18:13:40 +0000328Extension Modules
329-----------------
330
Georg Brandl38feaf02008-05-25 07:45:51 +0000331- Renamed ``_winreg`` module to ``winreg``.
332
Georg Brandl52b92cc2008-05-25 09:43:03 +0000333- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
334 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000335
336- Support for Windows 9x has been removed from the winsound module.
337
Georg Brandl52b92cc2008-05-25 09:43:03 +0000338- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000339
Brett Cannon0d71ee72008-05-08 18:13:40 +0000340Library
341-------
342
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000343- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
344 symtable.Symbol have been removed.
345
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000346- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
347
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000348- a new ``urllib`` package was created. It consists of code from
349 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
350 modules have all been removed. The new package has five submodules:
351 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
352 ``urllib.error``, and ``urllib.robotparser``. The
353 ``urllib.request.urlopen()`` function uses the url opener from
354 ``urllib2``. (Note that the unittests have not been renamed for the
355 beta, but they will be renamed in the future.)
356
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000357- rfc822 has been removed in favor of the email package.
358
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000359- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000360
Barry Warsawf5019422008-06-12 02:42:00 +0000361- Patch #2849: Remove use of rfc822 module from standard library.
362
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000363- Added C optimized implementation of io.StringIO.
364
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000365- The ``pickle`` module is now automatically use an optimized C
366 implementation of Pickler and Unpickler when available. The
367 ``cPickle`` module is no longer needed.
368
Georg Brandl877b10a2008-06-01 21:25:55 +0000369- Removed the ``htmllib`` and ``sgmllib`` modules.
370
Georg Brandl61013952008-05-28 15:56:30 +0000371- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
372 been removed from ``http.cookies``.
373
Brett Cannona23810f2008-05-26 19:04:21 +0000374- The ``commands`` module has been removed. Its getoutput() and
375 getstatusoutput() functions have been moved to the ``subprocess`` module.
376
Georg Brandl3d5c4252008-05-26 18:03:26 +0000377- The ``http`` package was created; it contains the old ``httplib``
378 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
379 as ``http.cookiejar``, and the content of the three ``HTTPServer``
380 modules as ``http.server``.
381
Georg Brandl38eceaa2008-05-26 11:14:17 +0000382- The ``xmlrpc`` package was created; it contains the old
383 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
384 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000385 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000386
387- The ``dbm`` package was created, containing the old modules
388 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
389 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
390 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
391 as submodules.
392
Georg Brandl52b92cc2008-05-25 09:43:03 +0000393- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000394
Georg Brandl52b92cc2008-05-25 09:43:03 +0000395- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000396
Georg Brandl52b92cc2008-05-25 09:43:03 +0000397- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000398
Georg Brandl52b92cc2008-05-25 09:43:03 +0000399- Issue #2250: Exceptions raised during evaluation of names in
400 rlcompleter's ``Completer.complete()`` method are now caught and
401 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000402
Georg Brandl52b92cc2008-05-25 09:43:03 +0000403- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
404 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000405
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000406- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
407 large to fit in a C long. ldexp(x, n) now returns a zero (with
408 suitable sign) if n is large and negative; previously, it raised
409 OverflowError.
410
Georg Brandl52b92cc2008-05-25 09:43:03 +0000411- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000412
Georg Brandl52b92cc2008-05-25 09:43:03 +0000413- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000414
Georg Brandl52b92cc2008-05-25 09:43:03 +0000415- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000416
Georg Brandl52b92cc2008-05-25 09:43:03 +0000417- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000418
Georg Brandl52b92cc2008-05-25 09:43:03 +0000419- Fixed the ``__all__`` setting on ``collections`` to include
420 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000421
Brett Cannoncf3520c2008-05-11 22:47:58 +0000422- The sre module has been removed.
423
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000424- The Queue module has been renamed to queue.
425
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000426- The copy_reg module has been renamed to copyreg.
427
Brett Cannond8b61ee2008-05-11 03:00:26 +0000428- The mhlib module has been removed.
429
Brett Cannonbd474422008-05-10 22:42:14 +0000430- The ihooks module has been removed.
431
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000432- The fpformat module has been removed.
433
Brett Cannonf4fd9932008-05-10 21:11:46 +0000434- The dircache module has been removed.
435
Brett Cannond175b4c2008-05-10 03:19:54 +0000436- The Canvas module has been removed.
437
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000438- The Decimal module gained the magic methods __round__, __ceil__,
439 __floor__ and __trunc__, to give support for round, math.ceil,
440 math.floor and math.trunc.
441
Brett Cannon900ee3a2008-05-08 20:31:11 +0000442- The user module has been removed.
443
Brett Cannon34afe872008-05-08 20:31:44 +0000444- The mutex module has been removed.
445
Brett Cannon0d71ee72008-05-08 18:13:40 +0000446- The imputil module has been removed.
447
Georg Brandl52b92cc2008-05-25 09:43:03 +0000448- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000449
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000450- pdb gained the "until" command.
451
Georg Brandl52b92cc2008-05-25 09:43:03 +0000452- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000453
Georg Brandl32de7af2008-08-18 23:07:41 +0000454- The threading module API was renamed to be PEP 8 compliant. The
455 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000456
Georg Brandl294d5a92008-06-01 19:25:32 +0000457Tools/Demos
458-----------
459
460- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000461
Brett Cannon0d71ee72008-05-08 18:13:40 +0000462Build
463-----
464
465
Barry Warsaw66079cd2008-04-04 01:36:36 +0000466What's New in Python 3.0a5?
467===========================
468
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000469*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000470
471Core and Builtins
472-----------------
473
Georg Brandl52b92cc2008-05-25 09:43:03 +0000474- Fixed misbehaviour of PyLong_FromSsize_t on systems where
475 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000476
Georg Brandl52b92cc2008-05-25 09:43:03 +0000477- Issue #2221: Corrected a SystemError "error return without exception
478 set", when the code executed by exec() raises an exception, and
479 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000480
Georg Brandl52b92cc2008-05-25 09:43:03 +0000481- Bug #2565: The repr() of type objects now calls them 'class', not
482 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000483
Martin v. Löwis790465f2008-04-05 20:41:37 +0000484- The command line processing was converted to pass Unicode strings
485 through as unmodified as possible; as a consequence, the C API
486 related to command line arguments was changed to use wchar_t.
487
Georg Brandl52b92cc2008-05-25 09:43:03 +0000488- All backslashes in raw strings are interpreted literally. This
489 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000490
Barry Warsaw66079cd2008-04-04 01:36:36 +0000491Extension Modules
492-----------------
493
494Library
495-------
496
Georg Brandl52b92cc2008-05-25 09:43:03 +0000497- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000498
Thomas Hellere106dc32008-04-24 18:39:36 +0000499- Issue #2682: ctypes callback functions now longer contain a cyclic
500 reference to themselves.
501
Georg Brandl52b92cc2008-05-25 09:43:03 +0000502- Issue #2058: Remove the buf attribute and add __slots__ to the
503 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000504
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000505- Bug #2606: Avoid calling .sort() on a dict_keys object.
506
Thomas Hellerbff533b2008-04-04 19:53:14 +0000507- The bundled libffi copy is now in sync with the recently released
508 libffi3.0.5 version, apart from some small changes to
509 Modules/_ctypes/libffi/configure.ac.
510
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000511Build
512-----
513
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000514- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
515
Guido van Rossumdc21db32008-04-07 18:37:41 +0000516- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000517 accidentally overwriting a Python 2.x installation. Use "make
518 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000519
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000520- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
521 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000522
Georg Brandl52b92cc2008-05-25 09:43:03 +0000523
Barry Warsawa9d499d2008-03-01 18:38:07 +0000524What's New in Python 3.0a4?
525===========================
526
Barry Warsawbb5cd082008-04-02 23:33:27 +0000527*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000528
Martin v. Löwis25931462008-03-17 20:43:42 +0000529Core and Builtins
530-----------------
531
532- Bug #2301: Don't try decoding the source code into the original
533 encoding for syntax errors.
534
Martin v. Löwis92fab752008-03-08 10:40:41 +0000535Extension Modules
536-----------------
537
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000538- The dl module was removed, use the ctypes module instead.
539
Martin v. Löwis92fab752008-03-08 10:40:41 +0000540- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000541
Martin v. Löwis071ef772008-03-08 11:24:24 +0000542Library
543-------
544
Georg Brandl52b92cc2008-05-25 09:43:03 +0000545- The class distutils.commands.build_py.build_py_2to3 can be used as a
546 build_py replacement to automatically run 2to3 on modules that are
547 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000548
Guido van Rossumf4169812008-03-17 22:56:06 +0000549- A new pickle protocol (protocol 3) is added with explicit support
550 for bytes. This is the default protocol. It intentionally cannot
551 be unpickled by Python 2.x.
552
553- When a pickle written by Python 2.x contains an (8-bit) str
554 instance, this is now decoded to a (Unicode) str instance. The
555 encoding used to do this defaults to ASCII, but can be overridden
556 via two new keyword arguments to the Unpickler class. Previously
557 this would create bytes instances, which is usually wrong: str
558 instances are often used to pickle attribute names etc., and text is
559 more common than binary data anyway.
560
Martin v. Löwis071ef772008-03-08 11:24:24 +0000561- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000562 system doesn't support CODESET and LANG isn't set or doesn't allow
563 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000564
Georg Brandl52b92cc2008-05-25 09:43:03 +0000565- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
566 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000567
Georg Brandl52b92cc2008-05-25 09:43:03 +0000568- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
569 has been renamed tokenize and now works with bytes rather than
570 strings. A new detect_encoding function has been added for
571 determining source file encoding according to PEP-0263. Token
572 sequences returned by tokenize always start with an ENCODING token
573 which specifies the encoding used to decode the file. This token is
574 used to encode the output of untokenize back to bytes.
575
Barry Warsawa9d499d2008-03-01 18:38:07 +0000576
Christian Heimesbc873412007-12-08 22:11:32 +0000577What's New in Python 3.0a3?
578===========================
579
Barry Warsaw659fc422008-03-01 17:45:23 +0000580*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000581
582Core and Builtins
583-----------------
584
Georg Brandl52b92cc2008-05-25 09:43:03 +0000585- Issue #2282: io.TextIOWrapper was not overriding seekable() from
586 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000587
Georg Brandl52b92cc2008-05-25 09:43:03 +0000588- Issue #2115: Important speedup in setting __slot__ attributes. Also
589 prevent a possible crash: an Abstract Base Class would try to access
590 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000591
Georg Brandl52b92cc2008-05-25 09:43:03 +0000592- Fixed repr() and str() of complex numbers with infinity or nan as
593 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000594
Georg Brandl52b92cc2008-05-25 09:43:03 +0000595- Clear all free list during a gc.collect() of the highest generation
596 in order to allow pymalloc to free more arenas. Python may give back
597 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000598
Georg Brandl52b92cc2008-05-25 09:43:03 +0000599- Issue #2045: Fix an infinite recursion triggered when printing a
600 subclass of collections.defaultdict, if its default_factory is set
601 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000602
603- Fixed a minor memory leak in dictobject.c. The content of the free
604 list was not freed on interpreter shutdown.
605
Georg Brandl52b92cc2008-05-25 09:43:03 +0000606- Limit free list of method and builtin function objects to 256
607 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000608
Georg Brandl52b92cc2008-05-25 09:43:03 +0000609- Patch #1953: Added ``sys._compact_freelists()`` and the C API
610 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000611 to compact the internal free lists of pre-allocted ints and floats.
612
613- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000614 Python expected the return type int but the fork familie returns
615 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000616
Georg Brandl52b92cc2008-05-25 09:43:03 +0000617- Issue #1678380: Fix a bug that identifies 0j and -0j when they
618 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000619
Georg Brandl52b92cc2008-05-25 09:43:03 +0000620- Issue #2025: Added tuple.count() and tuple.index() methods to comply
621 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000622
Georg Brandl52b92cc2008-05-25 09:43:03 +0000623- Fixed multiple reinitialization of the Python interpreter. The small
624 int list in longobject.c has caused a seg fault during the third
625 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000626
Georg Brandl52b92cc2008-05-25 09:43:03 +0000627- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000628
Georg Brandl52b92cc2008-05-25 09:43:03 +0000629- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000630
Georg Brandl52b92cc2008-05-25 09:43:03 +0000631- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000632
Georg Brandl52b92cc2008-05-25 09:43:03 +0000633- map() no longer accepts None for the first argument. Use zip()
634 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000635
Facundo Batista2336bdd2008-01-19 19:12:01 +0000636- Issue #1769: Now int("- 1") is not allowed any more.
637
Georg Brandl52b92cc2008-05-25 09:43:03 +0000638- Object/longobject.c: long(float('nan')) raises an OverflowError
639 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000640
Georg Brandl52b92cc2008-05-25 09:43:03 +0000641- Issue #1762972: __file__ points to the source file instead of the
642 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000643
Guido van Rossumab078dd2008-01-06 00:09:11 +0000644- Issue #1393: object_richcompare() returns NotImplemented instead of
645 False if the objects aren't equal, to give the other side a chance.
646
Guido van Rossume239b002008-01-06 00:44:20 +0000647- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000648
Georg Brandl52b92cc2008-05-25 09:43:03 +0000649- Improve some exception messages when Windows fails to load an
650 extension module. Now we get for example '%1 is not a valid Win32
651 application' instead of 'error code 193'. Also use Unicode strings
652 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000653
Georg Brandl52b92cc2008-05-25 09:43:03 +0000654- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
655 Python C API has gained a new type *PyInstanceMethod_Type* and the
656 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
657 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000658
Georg Brandl52b92cc2008-05-25 09:43:03 +0000659- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
660 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
661 are now enough to print the corresponding list of objects considered
662 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000663
Georg Brandl52b92cc2008-05-25 09:43:03 +0000664- Issue #1573: Improper use of the keyword-only syntax makes the
665 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000666
Georg Brandl52b92cc2008-05-25 09:43:03 +0000667- Issue #1564: The set implementation should special-case PyUnicode
668 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000669
Guido van Rossumea6775b2008-02-21 20:16:31 +0000670- Patch #1031213: Decode source line in SyntaxErrors back to its
671 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000672
Christian Heimes09aaa882008-02-23 15:01:06 +0000673- inspect.getsource() includes the decorators again.
674
Guido van Rossumea6775b2008-02-21 20:16:31 +0000675- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
676 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000677
Georg Brandl52b92cc2008-05-25 09:43:03 +0000678- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
679 the first chunk fed to the decoder started with a BOM, but was
680 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000681
Christian Heimesbc873412007-12-08 22:11:32 +0000682Extension Modules
683-----------------
684
Georg Brandl52b92cc2008-05-25 09:43:03 +0000685- Code for itertools ifilter(), imap(), and izip() moved to bultins
686 and renamed to filter(), map(), and zip(). Also, renamed
687 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000688
Georg Brandl52b92cc2008-05-25 09:43:03 +0000689- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000690
Georg Brandl52b92cc2008-05-25 09:43:03 +0000691- Bug #2111: mmap segfaults when trying to write a block opened with
692 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000693
Georg Brandl52b92cc2008-05-25 09:43:03 +0000694- Issue #2063: correct order of utime and stime in os.times() result
695 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000696
Christian Heimesbc873412007-12-08 22:11:32 +0000697Library
698-------
699
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000700- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000701
Georg Brandl52b92cc2008-05-25 09:43:03 +0000702- Created new UserDict class in collections module. This one inherits
703 from and complies with the MutableMapping ABC. Also, moved
704 UserString and UserList to the collections module. The
705 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000706
Guido van Rossumea6775b2008-02-21 20:16:31 +0000707- Removed UserDict.DictMixin. Replaced all its uses with
708 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000709
Guido van Rossume239b002008-01-06 00:44:20 +0000710- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000711
Guido van Rossume239b002008-01-06 00:44:20 +0000712- Issue #1585: IDLE uses non-existent xrange() function.
713
714- Issue #1578: Problems in win_getpass.
715
Georg Brandl52d168a2008-01-07 18:10:24 +0000716Build
717-----
718
Georg Brandl52b92cc2008-05-25 09:43:03 +0000719- Renamed --enable-unicode configure flag to --with-wide-unicode,
720 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000721
Guido van Rossume239b002008-01-06 00:44:20 +0000722C API
723-----
724
725- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
726 Py_TYPE and Py_REFCNT.
727
Georg Brandl52b92cc2008-05-25 09:43:03 +0000728- New API PyImport_ImportModuleNoBlock(), works like
729 PyImport_ImportModule() but won't block on the import lock
730 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000731
Christian Heimesbc873412007-12-08 22:11:32 +0000732
Fred Drake0e474a82007-10-11 18:01:43 +0000733What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000734===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000735
Guido van Rossum99533a92007-12-06 05:07:41 +0000736*Release date: 07-Dec-2007*
737
738(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000739
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000740Core and Builtins
741-----------------
742
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000743- str8 now has the same construction signature as bytes.
744
Georg Brandl52b92cc2008-05-25 09:43:03 +0000745- Comparisons between str and str8 now return False/True for ==/!=.
746 sqlite3 returns str8 when recreating on object from it's __conform__
747 value. The struct module returns str8 for all string-related
748 formats. This was true before this change, but becomes more
749 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000750
Georg Brandl52b92cc2008-05-25 09:43:03 +0000751- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
752 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000753
754- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
755
756- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000757 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000758 `PyUnicode_DecodeFSDefault(char*)` was added.
759
Georg Brandl52b92cc2008-05-25 09:43:03 +0000760- io.open() and _fileio.FileIO have grown a new argument closefd. A
761 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000762
Georg Brandl52b92cc2008-05-25 09:43:03 +0000763- Added a new option -b to issues warnings (-bb for errors) about
764 certain operations between bytes/buffer and str like str(b'') and
765 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000766
Georg Brandl52b92cc2008-05-25 09:43:03 +0000767- The standards streams sys.stdin, stdout and stderr may be None when
768 the when the C runtime library returns an invalid file descriptor
769 for the streams (fileno(stdin) < 0). For now this happens only for
770 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000771
Christian Heimesbce52be2007-11-17 19:08:41 +0000772- Added PCbuild9 directory for VS 2008.
773
Georg Brandl52b92cc2008-05-25 09:43:03 +0000774- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
775 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000776
Georg Brandl52b92cc2008-05-25 09:43:03 +0000777- Unbound methods are gone for good. ClassObject.method returns an
778 ordinary function object, instance.method still returns a bound
779 method object. The API of bound methods is cleaned up, too. The
780 im_class attribute is removed and im_func + im_self are renamed to
781 __func__ and __self__. The factory PyMethod_New takes only func and
782 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000783
Georg Brandl52b92cc2008-05-25 09:43:03 +0000784- intobject.h is no longer included by Python.h. The remains were
785 moved to longobject.h. It still exists to define several aliases
786 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000787
Christian Heimesa37d4c62007-12-04 23:02:19 +0000788- Removed sys.maxint, use sys.maxsize instead.
789
Fred Drake0e474a82007-10-11 18:01:43 +0000790Extension Modules
791-----------------
792
793- The `hotshot` profiler has been removed; use `cProfile` instead.
794
Brett Cannone9fd2312007-10-12 19:18:19 +0000795Library
796-------
797
Georg Brandl52b92cc2008-05-25 09:43:03 +0000798- When loading an external file using testfile(), the passed-in
799 encoding argument was being ignored if __loader__ is defined and
800 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000801
Georg Brandl52b92cc2008-05-25 09:43:03 +0000802- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
803 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000804
Christian Heimesc9543e42007-11-28 08:28:28 +0000805- Removed the 'new' module.
806
Georg Brandl52b92cc2008-05-25 09:43:03 +0000807- Removed all types from the 'types' module that are easily accessable
808 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000809
Georg Brandl52d168a2008-01-07 18:10:24 +0000810
Guido van Rossum4405cf32007-08-30 17:16:55 +0000811What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000812==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000813
Guido van Rossum4405cf32007-08-30 17:16:55 +0000814*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000815
816Core and Builtins
817-----------------
818
Martin v. Löwis47383402007-08-15 07:32:56 +0000819- PEP 3131: Support non-ASCII identifiers.
820
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000821- PEP 3120: Change default encoding to UTF-8.
822
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000823- PEP 3123: Use proper C inheritance for PyObject.
824
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000825- Removed the __oct__ and __hex__ special methods and added a bin()
826 builtin function.
827
Georg Brandl52b92cc2008-05-25 09:43:03 +0000828- PEP 3127: octal literals now start with "0o". Old-style octal
829 literals are invalid. There are binary literals with a prefix of
830 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000831
Guido van Rossume7ba4952007-06-06 23:52:48 +0000832- None, True, False are now keywords.
833
Guido van Rossum29478ef2007-05-29 00:39:44 +0000834- PEP 3119: isinstance() and issubclass() can be overridden.
835
Guido van Rossumebe3e162007-05-17 18:20:34 +0000836- Remove BaseException.message.
837
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000838- Remove tuple parameter unpacking (PEP 3113).
839
Georg Brandl52b92cc2008-05-25 09:43:03 +0000840- Remove the f_restricted attribute from frames. This naturally leads
841 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000842
Georg Brandl52b92cc2008-05-25 09:43:03 +0000843- PEP 3132 was accepted. That means that you can do ``a, *b =
844 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000845
Georg Brandl52b92cc2008-05-25 09:43:03 +0000846- range() now returns an iterator rather than a list. Floats are not
847 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000848
Nick Coghlan650f0d02007-04-15 12:05:43 +0000849- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000850 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000851
Guido van Rossume27dc722007-03-27 22:37:34 +0000852- By default, != returns the opposite of ==, unless the latter returns
853 NotImplemented.
854
Georg Brandl52b92cc2008-05-25 09:43:03 +0000855- Patch #1680961: sys.exitfunc has been removed and replaced with a
856 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000857
Georg Brandl801dd732007-03-18 20:18:31 +0000858- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000859 keyword arg in the class statement, which can now use the full
860 syntax of a parameter list. Also, the metaclass can implement a
861 __prepare__ function which will be called to create the dictionary
862 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000863
Georg Brandl428f0642007-03-18 18:35:15 +0000864- The long-deprecated argument "pend" of PyFloat_FromString() has been
865 removed.
866
Georg Brandle32b4222007-03-10 22:13:27 +0000867- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000868 its argument, if it exists. If not, it will work like before. This
869 allows customizing the output of dir() in the presence of a
870 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000871
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000872- Removed support for __members__ and __methods__.
873
Georg Brandle32b4222007-03-10 22:13:27 +0000874- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000875
Georg Brandle32b4222007-03-10 22:13:27 +0000876- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000877 functionality formerly known as raw_input(); the name raw_input() is
878 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000879
Georg Brandl52b92cc2008-05-25 09:43:03 +0000880- Classes listed in an 'except' clause must inherit from
881 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000882
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000883- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000884 and .keys(), .items(), .values() return dict views, which behave
885 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000886
Guido van Rossum8b545362007-02-09 23:52:14 +0000887- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000888 'softspace' attribute of files is now gone (since print() doesn't
889 use it). A side effect of this change is that you can get
890 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000891
892 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000893 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000894
895 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000896
Brett Cannon398db8b2007-01-29 23:44:37 +0000897- PEP 3102: keyword-only arguments.
898
Georg Brandl52b92cc2008-05-25 09:43:03 +0000899- Int/Long unification is complete. The 'long' built-in type and
900 literals with trailing 'L' or 'l' have been removed. Performance
901 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000902
903- 'except E, V' must now be spelled as 'except E as V' and deletes V
904 at the end of the except clause; V must be a simple name.
905
Neal Norwitzc1505362006-12-28 06:47:50 +0000906- Added function annotations per PEP 3107.
907
Georg Brandl52b92cc2008-05-25 09:43:03 +0000908- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000909
910 >>> def f(x):
911 ... def inc():
912 ... nonlocal x
913 ... x += 1
914 ... return x
915 ... return inc
916 ...
917 >>> inc = f(0)
918 >>> inc()
919 1
920 >>> inc()
921 2
922
Georg Brandl66a796e2006-12-19 20:50:34 +0000923- Moved intern() to sys.intern().
924
925- exec is now a function.
926
927- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000928
Neal Norwitz4886cc32006-08-21 17:06:07 +0000929- Classic classes are a thing of the past. All classes are new style.
930
931- Exceptions *must* derive from BaseException.
932
933- Integer division always returns a float. The -Q option is no more.
934 All the following are gone:
935 * PyNumber_Divide and PyNumber_InPlaceDivide
936 * __div__, __rdiv__, and __idiv__
937 * nb_divide, nb_inplace_divide
938 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
939 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
940 if we want to re-use __div__ and friends. If we do, it will make
941 it harder to write code for both 2.x and 3.x.)
942
943- 'as' and 'with' are keywords.
944
945- Absolute import is the default behavior for 'import foo' etc.
946
Georg Brandl52b92cc2008-05-25 09:43:03 +0000947- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000948
Georg Brandl52b92cc2008-05-25 09:43:03 +0000949- Removed these Python builtins: apply(), callable(), coerce(),
950 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000951
Georg Brandl52b92cc2008-05-25 09:43:03 +0000952- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000953
Georg Brandl52b92cc2008-05-25 09:43:03 +0000954- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000955
956- Remove C API support for restricted execution.
957
Guido van Rossumcf1be882007-08-30 22:07:17 +0000958- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000959 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000960 sequences of unequal length -- it now stops after the shortest one
961 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000962
Georg Brandl52b92cc2008-05-25 09:43:03 +0000963- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000964
965- Added class decorators per PEP 3129.
966
967
968Extension Modules
969-----------------
970
Georg Brandl52b92cc2008-05-25 09:43:03 +0000971- Removed the imageop module. Obsolete long with its unit tests
972 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000973
Georg Brandl52b92cc2008-05-25 09:43:03 +0000974- Removed these attributes from the operator module: div, idiv,
975 __div__, __idiv__, isCallable, sequenceIncludes.
976
977- Removed these attributes from the sys module: exc_clear(), exc_type,
978 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000979
980
981Library
982-------
983
Georg Brandl52b92cc2008-05-25 09:43:03 +0000984- Removed the compiler package. Use of the _ast module and (an
985 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000986
Georg Brandl52b92cc2008-05-25 09:43:03 +0000987- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
988 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
989 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000990
Georg Brandl52b92cc2008-05-25 09:43:03 +0000991- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000992
Georg Brandl52b92cc2008-05-25 09:43:03 +0000993- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
994 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
995 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000996
Georg Brandl52b92cc2008-05-25 09:43:03 +0000997- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000998
Georg Brandl52b92cc2008-05-25 09:43:03 +0000999- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001000 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001001
Georg Brandl52b92cc2008-05-25 09:43:03 +00001002- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001003
Georg Brandl52b92cc2008-05-25 09:43:03 +00001004- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001005
1006- Patch #1680961: atexit has been reimplemented in C.
1007
Walter Dörwald41980ca2007-08-16 21:55:45 +00001008- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1009
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001010Build
1011-----
1012
1013C API
1014-----
1015
Georg Brandl52b92cc2008-05-25 09:43:03 +00001016- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001017
Georg Brandl52b92cc2008-05-25 09:43:03 +00001018- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1019 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001020
Georg Brandl52b92cc2008-05-25 09:43:03 +00001021- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001022
Georg Brandl52b92cc2008-05-25 09:43:03 +00001023- Removed these macros: staticforward, statichere, PyArg_GetInt,
1024 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001025
Georg Brandl52b92cc2008-05-25 09:43:03 +00001026- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1027 intintobjargproc, getreadbufferproc, getwritebufferproc,
1028 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001029
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001030Tests
1031-----
1032
Brett Cannone7a30f72008-03-03 03:36:27 +00001033- Removed test.testall as test.regrtest replaces it.
1034
Brett Cannonced04e02005-02-13 22:53:22 +00001035Documentation
1036-------------
1037
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001038Mac
1039---
1040
Georg Brandl52b92cc2008-05-25 09:43:03 +00001041- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001042
Guido van Rossum845702c2007-08-30 18:44:53 +00001043Platforms
1044---------
1045
1046- Support for BeOS and AtheOS was removed (according to PEP 11).
1047
1048- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1049
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001050Tools/Demos
1051-----------
1052
Georg Brandl52b92cc2008-05-25 09:43:03 +00001053
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001054**(For information about older versions, consult the HISTORY file.)**