blob: 5947aeb303014aeaf7b7adddfe278b6f71aa797a [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 Petersonb3085c92008-09-01 23:09:31 +000063- The deprecation warnings for the camelCase threading API names were removed.
64
Benjamin Peterson6784eb72008-08-23 20:32:27 +000065Extension Modules
66-----------------
67
68- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
69 exploitation of poor argument checking.
70
Jesus Cea6ba33292008-08-31 14:12:11 +000071- bsddb code updated to version 4.7.3pre2. This code is the same than
72 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
73 The Python code is automatically translated using "2to3". Please, do not
74 update this code in Python 3.0 by hand. Update the 2.6 one and then
75 do "2to3".
76
Neal Norwitz8f2f22a2008-08-24 20:59:23 +000077Tools/Demos
78-----------
79
80- Fix Misc/gdbinit so it works.
81
Barry Warsaw8509df72008-08-21 03:02:47 +000082
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000083What's new in Python 3.0b3?
84===========================
85
Barry Warsaw57c10582008-08-21 02:39:51 +000086*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000087
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000088Core and Builtins
89-----------------
90
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +000091- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
92 arguments.
93
Antoine Pitrou616d2852008-08-19 22:09:34 +000094- Issue #2394: implement more of the memoryview API, with the caveat that
95 only one-dimensional contiguous buffers are supported and exercised right
96 now. Slicing, slice assignment and comparison (equality and inequality)
97 have been added. Also, the tolist() method has been implemented, but only
98 for byte buffers. Endly, the API has been updated to return bytes objects
99 wherever it used to return bytearrays.
100
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000101- Issue #3560: clean up the new C PyMemoryView API so that naming is
102 internally consistent; add macros PyMemoryView_GET_BASE() and
103 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
104 without relying on a particular implementation; remove the ill-named
105 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
106
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000107- ctypes function pointers that are COM methods have a boolean True
108 value again.
109
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000110- Issue #1819: function calls with several named parameters are now on
111 average 35% faster (as measured by pybench).
112
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000113- The undocumented C APIs PyUnicode_AsString() and
114 PyUnicode_AsStringAndSize() were made private to the interpreter, in
115 order to be able to refine their interfaces for Python 3.1.
116
117 If you need to access the UTF-8 representation of a Unicode object
118 as bytes string, please use PyUnicode_AsUTF8String() instead.
119
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000120- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
121 to Python 3.0's stricter semantics which allow to avoid successive
122 reallocations of the result string (this also affects str.join()).
123
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000124
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000125Library
126-------
127
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000128- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
129 a build problem on MacOS with CJK locales. It adds four temporary
130 mappings to existing legacy codecs that are virtually compatible
131 with Mac encodings. They will be replaced by codecs correctly
132 implemented in 3.1.
133
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000134- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
135 "global name 'header' is not defined".
136
Antoine Pitroufd036452008-08-19 17:56:33 +0000137- Issue #2834: update the regular expression library to match the unicode
138 standards of py3k. In other words, mixing bytes and unicode strings
139 (be it as pattern, search string or replacement string) raises a TypeError.
140 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
141 and can be disabled by specifying a new re.ASCII flag; as for bytes
142 patterns, ASCII matching is the only option and trying to specify re.UNICODE
143 for such patterns raises a ValueError.
144
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000145- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
146 Code contributed by Matt Giuca. quote() now encodes the input
147 before quoting, unquote() decodes after unquoting. There are
148 new arguments to change the encoding and errors settings.
149 There are also new APIs to skip the encode/decode steps.
150 [un]quote_plus() are also affected.
151
Nick Coghlan36f49522008-08-18 12:31:52 +0000152- Issue #2235: numbers.Number now blocks inheritance of the default id()
153 based hash because that hash mechanism is not correct for numeric types.
154 All concrete numeric types that inherit from Number (rather than just
155 registering with it) must explicitly provide a hash implementation in
156 order for their instances to be hashable.
157
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000158- Issue #2676: in the email package, content-type parsing was hanging on
159 pathological input because of quadratic or exponential behaviour of a
160 regular expression.
161
Antoine Pitrou87695762008-08-14 22:44:29 +0000162- Issue #3476: binary buffered reading through the new "io" library is now
163 thread-safe.
164
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000165- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
166 menu entries were not deleted.
167
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000168- Remove the TarFileCompat class from tarfile.py.
169
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000170- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
171 accepts the same parameters. It just checks that its first argument is an
172 integer.
173
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000174- Issue #3394: zipfile.writestr sets external attributes when passed a
175 file name rather than a ZipInfo instance, so files are extracted with
176 mode 0600 rather than 000 under Unix.
177
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000178- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
179 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000180
Martin v. Löwis371bb502008-08-16 13:02:57 +0000181Extension Modules
182-----------------
183
184- Bug #3542: Support Unicode strings in _msi module.
185
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000186What's new in Python 3.0b2?
187===========================
188
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000189*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000190
191Core and Builtins
192-----------------
193
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000194- Issue #3008: the float type has a new instance method 'float.hex'
195 and a new class method 'float.fromhex' to convert floating-point
196 numbers to and from hexadecimal strings, respectively.
197
Eric Smithd68af8f2008-07-16 00:15:35 +0000198- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
199 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
200
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000201- Issue #3280: like chr(), the "%c" format now accepts unicode code points
202 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
203 "narrow Unicode" builds, the result is a string of 2 code units, forming a
204 UTF-16 surrogate pair.
205
Georg Brandld52429f2008-07-04 15:55:02 +0000206- Issue #3282: str.isprintable() should return False for undefined
207 Unicode characters.
208
Martin v. Löwis029656f2008-06-30 04:06:08 +0000209- Issue #3236: Return small longs from PyLong_FromString.
210
Benjamin Petersone6528212008-07-15 15:32:09 +0000211- Exception tracebacks now support exception chaining.
212
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000213Library
214-------
215
Brett Cannonc2542e92008-07-25 18:19:20 +0000216- Removed the sunaudio module. Use sunau instead.
217
Thomas Heller47bc8092008-08-19 06:38:12 +0000218- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
219 api functions without holding the GIL, which could lead to a fatal
220 error when they failed.
221
222- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
223
Georg Brandl30704ea02008-07-23 15:07:12 +0000224- Removed "ast" function aliases from the parser module.
225
Thomas Heller15383a02008-07-15 19:46:52 +0000226- Issue #3313: Fixed a crash when a failed dlopen() call does not set
227 a valid dlerror() message.
228
Thomas Heller0261e1e2008-07-15 17:25:07 +0000229- Issue #3258: Fixed a crash when a ctypes POINTER type to an
230 incomplete structure was created.
231
Georg Brandl1abcbf82008-07-01 19:28:43 +0000232- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
233 argument now must be a bytes object in any case.
234
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000235- Issue #3145: help("modules whatever") failed when trying to load the source
236 code of every single module of the standard library, including invalid files
237 used in the test suite.
238
Georg Brandlbded4d32008-07-17 18:15:35 +0000239- The gettext library now consistently uses Unicode strings for message ids
240 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000241
Benjamin Petersone6528212008-07-15 15:32:09 +0000242- The traceback module has been expanded to handle chained exceptions.
243
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000244C API
245-----
246
247- Issue #3247: the function Py_FindMethod was removed. Modern types should
248 use the tp_methods slot instead.
249
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000250Tools/Demos
251-----------
252
Georg Brandl336341f2008-07-01 20:21:28 +0000253- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000254
Georg Brandl336341f2008-07-01 20:21:28 +0000255- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000256
257
Brett Cannon0d71ee72008-05-08 18:13:40 +0000258What's new in Python 3.0b1?
259===========================
260
Barry Warsawc1e689e2008-06-19 00:35:43 +0000261*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000262
263Core and Builtins
264-----------------
265
Brett Cannondb734912008-06-27 00:52:15 +0000266- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
267 argument being anything other than a dict or None. Also fixed a bug in error
268 handling when 'message' and 'category' were both set to None, triggering a
269 bus error.
270
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000271- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
272 holds the last (strong) reference to its referent.
273
Georg Brandl559e5d72008-06-11 18:37:52 +0000274- Issue #2630: implement PEP 3138. repr() now returns printable
275 Unicode characters unescaped, to get an ASCII-only representation
276 of an object use ascii().
277
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000278- Issue #1342: On windows, Python could not start when installed in a
279 directory with non-ascii characters.
280
Martin v. Löwis1a214512008-06-11 05:26:20 +0000281- Implement PEP 3121: new module initialization and finalization API.
282
Georg Brandle1b5ac62008-06-04 13:06:58 +0000283- Removed the already-defunct ``-t`` option.
284
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000285- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
286 unmarshalling many code objects, which happens when importing a
287 large .pyc file (~1000 functions).
288
Georg Brandl52b92cc2008-05-25 09:43:03 +0000289- Issue #2963: fix merging oversight that disabled method cache for
290 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000291
Georg Brandlc9b09532008-05-25 09:24:38 +0000292- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
293
Georg Brandl52b92cc2008-05-25 09:43:03 +0000294- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000295
Georg Brandl52b92cc2008-05-25 09:43:03 +0000296- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
297 code now allows any unicode string and returns a utf-8 encoded
298 buffer, just like the "s#" code already does. The "z" code was
299 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000300
Georg Brandl52b92cc2008-05-25 09:43:03 +0000301- Issue #2863: generators now have a ``gen.__name__`` attribute that
302 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
303 ``func.func_code.co_name``. The repr() of a generator now also
304 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000305
306- Issue #2831: enumerate() now has a ``start`` argument.
307
Georg Brandl52b92cc2008-05-25 09:43:03 +0000308- Issue #2801: fix bug in the float.is_integer method where a
309 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000310
Georg Brandl52b92cc2008-05-25 09:43:03 +0000311- The ``--with-toolbox-glue`` option (and the associated
312 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000313
Georg Brandl52b92cc2008-05-25 09:43:03 +0000314- Issue #2196: hasattr() now lets exceptions which do not inherit
315 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
316 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000317
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000318- #3021 Exception reraising sematics have been significantly improved. However,
319 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
320 code anymore.
321
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000322- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
323 removed.
324
Brett Cannon0d71ee72008-05-08 18:13:40 +0000325Extension Modules
326-----------------
327
Georg Brandl38feaf02008-05-25 07:45:51 +0000328- Renamed ``_winreg`` module to ``winreg``.
329
Georg Brandl52b92cc2008-05-25 09:43:03 +0000330- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
331 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000332
333- Support for Windows 9x has been removed from the winsound module.
334
Georg Brandl52b92cc2008-05-25 09:43:03 +0000335- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000336
Brett Cannon0d71ee72008-05-08 18:13:40 +0000337Library
338-------
339
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000340- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
341 symtable.Symbol have been removed.
342
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000343- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
344
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000345- a new ``urllib`` package was created. It consists of code from
346 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
347 modules have all been removed. The new package has five submodules:
348 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
349 ``urllib.error``, and ``urllib.robotparser``. The
350 ``urllib.request.urlopen()`` function uses the url opener from
351 ``urllib2``. (Note that the unittests have not been renamed for the
352 beta, but they will be renamed in the future.)
353
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000354- rfc822 has been removed in favor of the email package.
355
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000356- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000357
Barry Warsawf5019422008-06-12 02:42:00 +0000358- Patch #2849: Remove use of rfc822 module from standard library.
359
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000360- Added C optimized implementation of io.StringIO.
361
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000362- The ``pickle`` module is now automatically use an optimized C
363 implementation of Pickler and Unpickler when available. The
364 ``cPickle`` module is no longer needed.
365
Georg Brandl877b10a2008-06-01 21:25:55 +0000366- Removed the ``htmllib`` and ``sgmllib`` modules.
367
Georg Brandl61013952008-05-28 15:56:30 +0000368- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
369 been removed from ``http.cookies``.
370
Brett Cannona23810f2008-05-26 19:04:21 +0000371- The ``commands`` module has been removed. Its getoutput() and
372 getstatusoutput() functions have been moved to the ``subprocess`` module.
373
Georg Brandl3d5c4252008-05-26 18:03:26 +0000374- The ``http`` package was created; it contains the old ``httplib``
375 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
376 as ``http.cookiejar``, and the content of the three ``HTTPServer``
377 modules as ``http.server``.
378
Georg Brandl38eceaa2008-05-26 11:14:17 +0000379- The ``xmlrpc`` package was created; it contains the old
380 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
381 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000382 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000383
384- The ``dbm`` package was created, containing the old modules
385 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
386 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
387 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
388 as submodules.
389
Georg Brandl52b92cc2008-05-25 09:43:03 +0000390- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000391
Georg Brandl52b92cc2008-05-25 09:43:03 +0000392- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000393
Georg Brandl52b92cc2008-05-25 09:43:03 +0000394- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000395
Georg Brandl52b92cc2008-05-25 09:43:03 +0000396- Issue #2250: Exceptions raised during evaluation of names in
397 rlcompleter's ``Completer.complete()`` method are now caught and
398 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000399
Georg Brandl52b92cc2008-05-25 09:43:03 +0000400- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
401 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000402
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000403- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
404 large to fit in a C long. ldexp(x, n) now returns a zero (with
405 suitable sign) if n is large and negative; previously, it raised
406 OverflowError.
407
Georg Brandl52b92cc2008-05-25 09:43:03 +0000408- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000409
Georg Brandl52b92cc2008-05-25 09:43:03 +0000410- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000411
Georg Brandl52b92cc2008-05-25 09:43:03 +0000412- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000413
Georg Brandl52b92cc2008-05-25 09:43:03 +0000414- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000415
Georg Brandl52b92cc2008-05-25 09:43:03 +0000416- Fixed the ``__all__`` setting on ``collections`` to include
417 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000418
Brett Cannoncf3520c2008-05-11 22:47:58 +0000419- The sre module has been removed.
420
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000421- The Queue module has been renamed to queue.
422
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000423- The copy_reg module has been renamed to copyreg.
424
Brett Cannond8b61ee2008-05-11 03:00:26 +0000425- The mhlib module has been removed.
426
Brett Cannonbd474422008-05-10 22:42:14 +0000427- The ihooks module has been removed.
428
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000429- The fpformat module has been removed.
430
Brett Cannonf4fd9932008-05-10 21:11:46 +0000431- The dircache module has been removed.
432
Brett Cannond175b4c2008-05-10 03:19:54 +0000433- The Canvas module has been removed.
434
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000435- The Decimal module gained the magic methods __round__, __ceil__,
436 __floor__ and __trunc__, to give support for round, math.ceil,
437 math.floor and math.trunc.
438
Brett Cannon900ee3a2008-05-08 20:31:11 +0000439- The user module has been removed.
440
Brett Cannon34afe872008-05-08 20:31:44 +0000441- The mutex module has been removed.
442
Brett Cannon0d71ee72008-05-08 18:13:40 +0000443- The imputil module has been removed.
444
Georg Brandl52b92cc2008-05-25 09:43:03 +0000445- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000446
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000447- pdb gained the "until" command.
448
Georg Brandl52b92cc2008-05-25 09:43:03 +0000449- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000450
Georg Brandl32de7af2008-08-18 23:07:41 +0000451- The threading module API was renamed to be PEP 8 compliant. The
452 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000453
Georg Brandl294d5a92008-06-01 19:25:32 +0000454Tools/Demos
455-----------
456
457- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000458
Brett Cannon0d71ee72008-05-08 18:13:40 +0000459Build
460-----
461
462
Barry Warsaw66079cd2008-04-04 01:36:36 +0000463What's New in Python 3.0a5?
464===========================
465
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000466*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000467
468Core and Builtins
469-----------------
470
Georg Brandl52b92cc2008-05-25 09:43:03 +0000471- Fixed misbehaviour of PyLong_FromSsize_t on systems where
472 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000473
Georg Brandl52b92cc2008-05-25 09:43:03 +0000474- Issue #2221: Corrected a SystemError "error return without exception
475 set", when the code executed by exec() raises an exception, and
476 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000477
Georg Brandl52b92cc2008-05-25 09:43:03 +0000478- Bug #2565: The repr() of type objects now calls them 'class', not
479 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000480
Martin v. Löwis790465f2008-04-05 20:41:37 +0000481- The command line processing was converted to pass Unicode strings
482 through as unmodified as possible; as a consequence, the C API
483 related to command line arguments was changed to use wchar_t.
484
Georg Brandl52b92cc2008-05-25 09:43:03 +0000485- All backslashes in raw strings are interpreted literally. This
486 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000487
Barry Warsaw66079cd2008-04-04 01:36:36 +0000488Extension Modules
489-----------------
490
491Library
492-------
493
Georg Brandl52b92cc2008-05-25 09:43:03 +0000494- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000495
Thomas Hellere106dc32008-04-24 18:39:36 +0000496- Issue #2682: ctypes callback functions now longer contain a cyclic
497 reference to themselves.
498
Georg Brandl52b92cc2008-05-25 09:43:03 +0000499- Issue #2058: Remove the buf attribute and add __slots__ to the
500 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000501
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000502- Bug #2606: Avoid calling .sort() on a dict_keys object.
503
Thomas Hellerbff533b2008-04-04 19:53:14 +0000504- The bundled libffi copy is now in sync with the recently released
505 libffi3.0.5 version, apart from some small changes to
506 Modules/_ctypes/libffi/configure.ac.
507
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000508Build
509-----
510
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000511- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
512
Guido van Rossumdc21db32008-04-07 18:37:41 +0000513- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000514 accidentally overwriting a Python 2.x installation. Use "make
515 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000516
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000517- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
518 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000519
Georg Brandl52b92cc2008-05-25 09:43:03 +0000520
Barry Warsawa9d499d2008-03-01 18:38:07 +0000521What's New in Python 3.0a4?
522===========================
523
Barry Warsawbb5cd082008-04-02 23:33:27 +0000524*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000525
Martin v. Löwis25931462008-03-17 20:43:42 +0000526Core and Builtins
527-----------------
528
529- Bug #2301: Don't try decoding the source code into the original
530 encoding for syntax errors.
531
Martin v. Löwis92fab752008-03-08 10:40:41 +0000532Extension Modules
533-----------------
534
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000535- The dl module was removed, use the ctypes module instead.
536
Martin v. Löwis92fab752008-03-08 10:40:41 +0000537- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000538
Martin v. Löwis071ef772008-03-08 11:24:24 +0000539Library
540-------
541
Georg Brandl52b92cc2008-05-25 09:43:03 +0000542- The class distutils.commands.build_py.build_py_2to3 can be used as a
543 build_py replacement to automatically run 2to3 on modules that are
544 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000545
Guido van Rossumf4169812008-03-17 22:56:06 +0000546- A new pickle protocol (protocol 3) is added with explicit support
547 for bytes. This is the default protocol. It intentionally cannot
548 be unpickled by Python 2.x.
549
550- When a pickle written by Python 2.x contains an (8-bit) str
551 instance, this is now decoded to a (Unicode) str instance. The
552 encoding used to do this defaults to ASCII, but can be overridden
553 via two new keyword arguments to the Unpickler class. Previously
554 this would create bytes instances, which is usually wrong: str
555 instances are often used to pickle attribute names etc., and text is
556 more common than binary data anyway.
557
Martin v. Löwis071ef772008-03-08 11:24:24 +0000558- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000559 system doesn't support CODESET and LANG isn't set or doesn't allow
560 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000561
Georg Brandl52b92cc2008-05-25 09:43:03 +0000562- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
563 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000564
Georg Brandl52b92cc2008-05-25 09:43:03 +0000565- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
566 has been renamed tokenize and now works with bytes rather than
567 strings. A new detect_encoding function has been added for
568 determining source file encoding according to PEP-0263. Token
569 sequences returned by tokenize always start with an ENCODING token
570 which specifies the encoding used to decode the file. This token is
571 used to encode the output of untokenize back to bytes.
572
Barry Warsawa9d499d2008-03-01 18:38:07 +0000573
Christian Heimesbc873412007-12-08 22:11:32 +0000574What's New in Python 3.0a3?
575===========================
576
Barry Warsaw659fc422008-03-01 17:45:23 +0000577*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000578
579Core and Builtins
580-----------------
581
Georg Brandl52b92cc2008-05-25 09:43:03 +0000582- Issue #2282: io.TextIOWrapper was not overriding seekable() from
583 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000584
Georg Brandl52b92cc2008-05-25 09:43:03 +0000585- Issue #2115: Important speedup in setting __slot__ attributes. Also
586 prevent a possible crash: an Abstract Base Class would try to access
587 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000588
Georg Brandl52b92cc2008-05-25 09:43:03 +0000589- Fixed repr() and str() of complex numbers with infinity or nan as
590 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000591
Georg Brandl52b92cc2008-05-25 09:43:03 +0000592- Clear all free list during a gc.collect() of the highest generation
593 in order to allow pymalloc to free more arenas. Python may give back
594 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000595
Georg Brandl52b92cc2008-05-25 09:43:03 +0000596- Issue #2045: Fix an infinite recursion triggered when printing a
597 subclass of collections.defaultdict, if its default_factory is set
598 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000599
600- Fixed a minor memory leak in dictobject.c. The content of the free
601 list was not freed on interpreter shutdown.
602
Georg Brandl52b92cc2008-05-25 09:43:03 +0000603- Limit free list of method and builtin function objects to 256
604 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000605
Georg Brandl52b92cc2008-05-25 09:43:03 +0000606- Patch #1953: Added ``sys._compact_freelists()`` and the C API
607 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000608 to compact the internal free lists of pre-allocted ints and floats.
609
610- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000611 Python expected the return type int but the fork familie returns
612 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000613
Georg Brandl52b92cc2008-05-25 09:43:03 +0000614- Issue #1678380: Fix a bug that identifies 0j and -0j when they
615 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000616
Georg Brandl52b92cc2008-05-25 09:43:03 +0000617- Issue #2025: Added tuple.count() and tuple.index() methods to comply
618 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000619
Georg Brandl52b92cc2008-05-25 09:43:03 +0000620- Fixed multiple reinitialization of the Python interpreter. The small
621 int list in longobject.c has caused a seg fault during the third
622 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000623
Georg Brandl52b92cc2008-05-25 09:43:03 +0000624- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000625
Georg Brandl52b92cc2008-05-25 09:43:03 +0000626- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000627
Georg Brandl52b92cc2008-05-25 09:43:03 +0000628- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000629
Georg Brandl52b92cc2008-05-25 09:43:03 +0000630- map() no longer accepts None for the first argument. Use zip()
631 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000632
Facundo Batista2336bdd2008-01-19 19:12:01 +0000633- Issue #1769: Now int("- 1") is not allowed any more.
634
Georg Brandl52b92cc2008-05-25 09:43:03 +0000635- Object/longobject.c: long(float('nan')) raises an OverflowError
636 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000637
Georg Brandl52b92cc2008-05-25 09:43:03 +0000638- Issue #1762972: __file__ points to the source file instead of the
639 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000640
Guido van Rossumab078dd2008-01-06 00:09:11 +0000641- Issue #1393: object_richcompare() returns NotImplemented instead of
642 False if the objects aren't equal, to give the other side a chance.
643
Guido van Rossume239b002008-01-06 00:44:20 +0000644- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000645
Georg Brandl52b92cc2008-05-25 09:43:03 +0000646- Improve some exception messages when Windows fails to load an
647 extension module. Now we get for example '%1 is not a valid Win32
648 application' instead of 'error code 193'. Also use Unicode strings
649 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000650
Georg Brandl52b92cc2008-05-25 09:43:03 +0000651- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
652 Python C API has gained a new type *PyInstanceMethod_Type* and the
653 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
654 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000655
Georg Brandl52b92cc2008-05-25 09:43:03 +0000656- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
657 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
658 are now enough to print the corresponding list of objects considered
659 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000660
Georg Brandl52b92cc2008-05-25 09:43:03 +0000661- Issue #1573: Improper use of the keyword-only syntax makes the
662 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000663
Georg Brandl52b92cc2008-05-25 09:43:03 +0000664- Issue #1564: The set implementation should special-case PyUnicode
665 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000666
Guido van Rossumea6775b2008-02-21 20:16:31 +0000667- Patch #1031213: Decode source line in SyntaxErrors back to its
668 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000669
Christian Heimes09aaa882008-02-23 15:01:06 +0000670- inspect.getsource() includes the decorators again.
671
Guido van Rossumea6775b2008-02-21 20:16:31 +0000672- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
673 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000674
Georg Brandl52b92cc2008-05-25 09:43:03 +0000675- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
676 the first chunk fed to the decoder started with a BOM, but was
677 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000678
Christian Heimesbc873412007-12-08 22:11:32 +0000679Extension Modules
680-----------------
681
Georg Brandl52b92cc2008-05-25 09:43:03 +0000682- Code for itertools ifilter(), imap(), and izip() moved to bultins
683 and renamed to filter(), map(), and zip(). Also, renamed
684 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000685
Georg Brandl52b92cc2008-05-25 09:43:03 +0000686- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000687
Georg Brandl52b92cc2008-05-25 09:43:03 +0000688- Bug #2111: mmap segfaults when trying to write a block opened with
689 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000690
Georg Brandl52b92cc2008-05-25 09:43:03 +0000691- Issue #2063: correct order of utime and stime in os.times() result
692 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000693
Christian Heimesbc873412007-12-08 22:11:32 +0000694Library
695-------
696
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000697- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000698
Georg Brandl52b92cc2008-05-25 09:43:03 +0000699- Created new UserDict class in collections module. This one inherits
700 from and complies with the MutableMapping ABC. Also, moved
701 UserString and UserList to the collections module. The
702 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000703
Guido van Rossumea6775b2008-02-21 20:16:31 +0000704- Removed UserDict.DictMixin. Replaced all its uses with
705 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000706
Guido van Rossume239b002008-01-06 00:44:20 +0000707- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000708
Guido van Rossume239b002008-01-06 00:44:20 +0000709- Issue #1585: IDLE uses non-existent xrange() function.
710
711- Issue #1578: Problems in win_getpass.
712
Georg Brandl52d168a2008-01-07 18:10:24 +0000713Build
714-----
715
Georg Brandl52b92cc2008-05-25 09:43:03 +0000716- Renamed --enable-unicode configure flag to --with-wide-unicode,
717 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000718
Guido van Rossume239b002008-01-06 00:44:20 +0000719C API
720-----
721
722- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
723 Py_TYPE and Py_REFCNT.
724
Georg Brandl52b92cc2008-05-25 09:43:03 +0000725- New API PyImport_ImportModuleNoBlock(), works like
726 PyImport_ImportModule() but won't block on the import lock
727 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000728
Christian Heimesbc873412007-12-08 22:11:32 +0000729
Fred Drake0e474a82007-10-11 18:01:43 +0000730What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000731===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000732
Guido van Rossum99533a92007-12-06 05:07:41 +0000733*Release date: 07-Dec-2007*
734
735(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000736
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000737Core and Builtins
738-----------------
739
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000740- str8 now has the same construction signature as bytes.
741
Georg Brandl52b92cc2008-05-25 09:43:03 +0000742- Comparisons between str and str8 now return False/True for ==/!=.
743 sqlite3 returns str8 when recreating on object from it's __conform__
744 value. The struct module returns str8 for all string-related
745 formats. This was true before this change, but becomes more
746 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000747
Georg Brandl52b92cc2008-05-25 09:43:03 +0000748- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
749 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000750
751- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
752
753- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000754 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000755 `PyUnicode_DecodeFSDefault(char*)` was added.
756
Georg Brandl52b92cc2008-05-25 09:43:03 +0000757- io.open() and _fileio.FileIO have grown a new argument closefd. A
758 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000759
Georg Brandl52b92cc2008-05-25 09:43:03 +0000760- Added a new option -b to issues warnings (-bb for errors) about
761 certain operations between bytes/buffer and str like str(b'') and
762 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000763
Georg Brandl52b92cc2008-05-25 09:43:03 +0000764- The standards streams sys.stdin, stdout and stderr may be None when
765 the when the C runtime library returns an invalid file descriptor
766 for the streams (fileno(stdin) < 0). For now this happens only for
767 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000768
Christian Heimesbce52be2007-11-17 19:08:41 +0000769- Added PCbuild9 directory for VS 2008.
770
Georg Brandl52b92cc2008-05-25 09:43:03 +0000771- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
772 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000773
Georg Brandl52b92cc2008-05-25 09:43:03 +0000774- Unbound methods are gone for good. ClassObject.method returns an
775 ordinary function object, instance.method still returns a bound
776 method object. The API of bound methods is cleaned up, too. The
777 im_class attribute is removed and im_func + im_self are renamed to
778 __func__ and __self__. The factory PyMethod_New takes only func and
779 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000780
Georg Brandl52b92cc2008-05-25 09:43:03 +0000781- intobject.h is no longer included by Python.h. The remains were
782 moved to longobject.h. It still exists to define several aliases
783 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000784
Christian Heimesa37d4c62007-12-04 23:02:19 +0000785- Removed sys.maxint, use sys.maxsize instead.
786
Fred Drake0e474a82007-10-11 18:01:43 +0000787Extension Modules
788-----------------
789
790- The `hotshot` profiler has been removed; use `cProfile` instead.
791
Brett Cannone9fd2312007-10-12 19:18:19 +0000792Library
793-------
794
Georg Brandl52b92cc2008-05-25 09:43:03 +0000795- When loading an external file using testfile(), the passed-in
796 encoding argument was being ignored if __loader__ is defined and
797 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000798
Georg Brandl52b92cc2008-05-25 09:43:03 +0000799- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
800 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000801
Christian Heimesc9543e42007-11-28 08:28:28 +0000802- Removed the 'new' module.
803
Georg Brandl52b92cc2008-05-25 09:43:03 +0000804- Removed all types from the 'types' module that are easily accessable
805 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000806
Georg Brandl52d168a2008-01-07 18:10:24 +0000807
Guido van Rossum4405cf32007-08-30 17:16:55 +0000808What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000809==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000810
Guido van Rossum4405cf32007-08-30 17:16:55 +0000811*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000812
813Core and Builtins
814-----------------
815
Martin v. Löwis47383402007-08-15 07:32:56 +0000816- PEP 3131: Support non-ASCII identifiers.
817
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000818- PEP 3120: Change default encoding to UTF-8.
819
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000820- PEP 3123: Use proper C inheritance for PyObject.
821
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000822- Removed the __oct__ and __hex__ special methods and added a bin()
823 builtin function.
824
Georg Brandl52b92cc2008-05-25 09:43:03 +0000825- PEP 3127: octal literals now start with "0o". Old-style octal
826 literals are invalid. There are binary literals with a prefix of
827 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000828
Guido van Rossume7ba4952007-06-06 23:52:48 +0000829- None, True, False are now keywords.
830
Guido van Rossum29478ef2007-05-29 00:39:44 +0000831- PEP 3119: isinstance() and issubclass() can be overridden.
832
Guido van Rossumebe3e162007-05-17 18:20:34 +0000833- Remove BaseException.message.
834
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000835- Remove tuple parameter unpacking (PEP 3113).
836
Georg Brandl52b92cc2008-05-25 09:43:03 +0000837- Remove the f_restricted attribute from frames. This naturally leads
838 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000839
Georg Brandl52b92cc2008-05-25 09:43:03 +0000840- PEP 3132 was accepted. That means that you can do ``a, *b =
841 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000842
Georg Brandl52b92cc2008-05-25 09:43:03 +0000843- range() now returns an iterator rather than a list. Floats are not
844 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000845
Nick Coghlan650f0d02007-04-15 12:05:43 +0000846- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000847 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000848
Guido van Rossume27dc722007-03-27 22:37:34 +0000849- By default, != returns the opposite of ==, unless the latter returns
850 NotImplemented.
851
Georg Brandl52b92cc2008-05-25 09:43:03 +0000852- Patch #1680961: sys.exitfunc has been removed and replaced with a
853 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000854
Georg Brandl801dd732007-03-18 20:18:31 +0000855- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000856 keyword arg in the class statement, which can now use the full
857 syntax of a parameter list. Also, the metaclass can implement a
858 __prepare__ function which will be called to create the dictionary
859 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000860
Georg Brandl428f0642007-03-18 18:35:15 +0000861- The long-deprecated argument "pend" of PyFloat_FromString() has been
862 removed.
863
Georg Brandle32b4222007-03-10 22:13:27 +0000864- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000865 its argument, if it exists. If not, it will work like before. This
866 allows customizing the output of dir() in the presence of a
867 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000868
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000869- Removed support for __members__ and __methods__.
870
Georg Brandle32b4222007-03-10 22:13:27 +0000871- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000872
Georg Brandle32b4222007-03-10 22:13:27 +0000873- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000874 functionality formerly known as raw_input(); the name raw_input() is
875 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000876
Georg Brandl52b92cc2008-05-25 09:43:03 +0000877- Classes listed in an 'except' clause must inherit from
878 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000879
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000880- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000881 and .keys(), .items(), .values() return dict views, which behave
882 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000883
Guido van Rossum8b545362007-02-09 23:52:14 +0000884- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000885 'softspace' attribute of files is now gone (since print() doesn't
886 use it). A side effect of this change is that you can get
887 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000888
889 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000890 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000891
892 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000893
Brett Cannon398db8b2007-01-29 23:44:37 +0000894- PEP 3102: keyword-only arguments.
895
Georg Brandl52b92cc2008-05-25 09:43:03 +0000896- Int/Long unification is complete. The 'long' built-in type and
897 literals with trailing 'L' or 'l' have been removed. Performance
898 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000899
900- 'except E, V' must now be spelled as 'except E as V' and deletes V
901 at the end of the except clause; V must be a simple name.
902
Neal Norwitzc1505362006-12-28 06:47:50 +0000903- Added function annotations per PEP 3107.
904
Georg Brandl52b92cc2008-05-25 09:43:03 +0000905- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000906
907 >>> def f(x):
908 ... def inc():
909 ... nonlocal x
910 ... x += 1
911 ... return x
912 ... return inc
913 ...
914 >>> inc = f(0)
915 >>> inc()
916 1
917 >>> inc()
918 2
919
Georg Brandl66a796e2006-12-19 20:50:34 +0000920- Moved intern() to sys.intern().
921
922- exec is now a function.
923
924- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000925
Neal Norwitz4886cc32006-08-21 17:06:07 +0000926- Classic classes are a thing of the past. All classes are new style.
927
928- Exceptions *must* derive from BaseException.
929
930- Integer division always returns a float. The -Q option is no more.
931 All the following are gone:
932 * PyNumber_Divide and PyNumber_InPlaceDivide
933 * __div__, __rdiv__, and __idiv__
934 * nb_divide, nb_inplace_divide
935 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
936 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
937 if we want to re-use __div__ and friends. If we do, it will make
938 it harder to write code for both 2.x and 3.x.)
939
940- 'as' and 'with' are keywords.
941
942- Absolute import is the default behavior for 'import foo' etc.
943
Georg Brandl52b92cc2008-05-25 09:43:03 +0000944- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000945
Georg Brandl52b92cc2008-05-25 09:43:03 +0000946- Removed these Python builtins: apply(), callable(), coerce(),
947 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000948
Georg Brandl52b92cc2008-05-25 09:43:03 +0000949- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000950
Georg Brandl52b92cc2008-05-25 09:43:03 +0000951- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000952
953- Remove C API support for restricted execution.
954
Guido van Rossumcf1be882007-08-30 22:07:17 +0000955- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000956 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000957 sequences of unequal length -- it now stops after the shortest one
958 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000959
Georg Brandl52b92cc2008-05-25 09:43:03 +0000960- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000961
962- Added class decorators per PEP 3129.
963
964
965Extension Modules
966-----------------
967
Georg Brandl52b92cc2008-05-25 09:43:03 +0000968- Removed the imageop module. Obsolete long with its unit tests
969 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000970
Georg Brandl52b92cc2008-05-25 09:43:03 +0000971- Removed these attributes from the operator module: div, idiv,
972 __div__, __idiv__, isCallable, sequenceIncludes.
973
974- Removed these attributes from the sys module: exc_clear(), exc_type,
975 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000976
977
978Library
979-------
980
Georg Brandl52b92cc2008-05-25 09:43:03 +0000981- Removed the compiler package. Use of the _ast module and (an
982 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000983
Georg Brandl52b92cc2008-05-25 09:43:03 +0000984- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
985 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
986 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000987
Georg Brandl52b92cc2008-05-25 09:43:03 +0000988- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000989
Georg Brandl52b92cc2008-05-25 09:43:03 +0000990- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
991 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
992 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000993
Georg Brandl52b92cc2008-05-25 09:43:03 +0000994- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000995
Georg Brandl52b92cc2008-05-25 09:43:03 +0000996- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000997 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000998
Georg Brandl52b92cc2008-05-25 09:43:03 +0000999- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001000
Georg Brandl52b92cc2008-05-25 09:43:03 +00001001- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001002
1003- Patch #1680961: atexit has been reimplemented in C.
1004
Walter Dörwald41980ca2007-08-16 21:55:45 +00001005- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1006
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001007Build
1008-----
1009
1010C API
1011-----
1012
Georg Brandl52b92cc2008-05-25 09:43:03 +00001013- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001014
Georg Brandl52b92cc2008-05-25 09:43:03 +00001015- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1016 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001017
Georg Brandl52b92cc2008-05-25 09:43:03 +00001018- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001019
Georg Brandl52b92cc2008-05-25 09:43:03 +00001020- Removed these macros: staticforward, statichere, PyArg_GetInt,
1021 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001022
Georg Brandl52b92cc2008-05-25 09:43:03 +00001023- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1024 intintobjargproc, getreadbufferproc, getwritebufferproc,
1025 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001026
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001027Tests
1028-----
1029
Brett Cannone7a30f72008-03-03 03:36:27 +00001030- Removed test.testall as test.regrtest replaces it.
1031
Brett Cannonced04e02005-02-13 22:53:22 +00001032Documentation
1033-------------
1034
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001035Mac
1036---
1037
Georg Brandl52b92cc2008-05-25 09:43:03 +00001038- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001039
Guido van Rossum845702c2007-08-30 18:44:53 +00001040Platforms
1041---------
1042
1043- Support for BeOS and AtheOS was removed (according to PEP 11).
1044
1045- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1046
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001047Tools/Demos
1048-----------
1049
Georg Brandl52b92cc2008-05-25 09:43:03 +00001050
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001051**(For information about older versions, consult the HISTORY file.)**