blob: 355633d0425c594d953ba989f0b0ed2afd733368 [file] [log] [blame]
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001+++++++++++
2Python News
3+++++++++++
4
Anthony Baxterb0c66302004-11-04 05:23:17 +00005(editors: check NEWS.help for information about editing NEWS using ReST.)
6
Barry Warsaw8509df72008-08-21 03:02:47 +00007What's New in Python 3.0 release candidate 1
8============================================
9
10*Release date: XX-XXXX-2008*
11
12Core and Builtins
13-----------------
14
Brett Cannon54bd41d2008-09-02 04:01:42 +000015- Issue 3639: The _warnings module could segfault the interpreter when
16 unexpected types were passed in as arguments.
17
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +000018- Issue #3712: The memoryview object had a reference leak and didn't support
19 cyclic garbage collection.
20
Antoine Pitrouf71995782008-08-29 18:37:05 +000021- Issue #3668: Fix a memory leak with the "s*" argument parser in
22 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
23 was correctly parsed but parsing of subsequent arguments failed.
24
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +000025- Issue #3611: An exception __context__ could be cleared in a complex pattern
26 involving a __del__ method re-raising an exception.
27
Antoine Pitrouec569b72008-08-26 22:40:48 +000028- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
29 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
30 mechanism. In the process, fix a bug where isinstance() and issubclass(),
31 when given a tuple of classes as second argument, were looking up
32 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
33 type object.
34
Antoine Pitroue2dffc02008-08-26 22:02:58 +000035- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
36
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +000037- Issue #3651: Fix various memory leaks when using the buffer
38 interface, or when the "s#" code of PyArg_ParseTuple is given a
39 bytes object.
40
Neal Norwitz6ae2eb22008-08-24 23:50:08 +000041- Issue #3657: Fix uninitialized memory read when pickling longs.
42 Found by valgrind.
43
Neal Norwitz3ce5d922008-08-24 07:08:55 +000044- Apply security patches from Apple.
45
Neal Norwitz2f99b242008-08-24 05:48:10 +000046- Fix crashes on memory allocation failure found with failmalloc.
47
48- Fix memory leaks found with valgrind and update suppressions file.
49
50- Fix compiler warnings in opt mode which would lead to invalid memory reads.
51
52- Fix problem using wrong name in decimal module reported by pychecker.
53
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000054- Issue #3650: Fixed a reference leak in bytes.split('x').
55
Benjamin Petersonc15a0732008-08-26 16:46:47 +000056- bytes(o) now tries to use o.__bytes__() before using fallbacks.
57
58C API
59-----
60
61- PyObject_Bytes and PyBytes_FromObject were added.
62
Barry Warsaw8509df72008-08-21 03:02:47 +000063Library
64-------
65
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +000066- Issue #3719: platform.architecture() fails if there are spaces in the
67 path to the Python binary.
68
Brett Cannonec92e182008-09-02 02:46:59 +000069- Issue 3602: As part of the merge of r66135, make the parameters on
70 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
71
Benjamin Petersonb3085c92008-09-01 23:09:31 +000072- The deprecation warnings for the camelCase threading API names were removed.
73
Benjamin Peterson6784eb72008-08-23 20:32:27 +000074Extension Modules
75-----------------
76
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +000077- Issue #2975: When compiling several extension modules with Visual Studio 2008
78 from the same python interpreter, some environment variables would grow
79 without limit.
80
Benjamin Peterson6784eb72008-08-23 20:32:27 +000081- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
82 exploitation of poor argument checking.
83
Jesus Cea6ba33292008-08-31 14:12:11 +000084- bsddb code updated to version 4.7.3pre2. This code is the same than
85 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
86 The Python code is automatically translated using "2to3". Please, do not
87 update this code in Python 3.0 by hand. Update the 2.6 one and then
88 do "2to3".
89
Neal Norwitz8f2f22a2008-08-24 20:59:23 +000090Tools/Demos
91-----------
92
93- Fix Misc/gdbinit so it works.
94
Barry Warsaw8509df72008-08-21 03:02:47 +000095
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000096What's new in Python 3.0b3?
97===========================
98
Barry Warsaw57c10582008-08-21 02:39:51 +000099*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000100
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000101Core and Builtins
102-----------------
103
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000104- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
105 arguments.
106
Antoine Pitrou616d2852008-08-19 22:09:34 +0000107- Issue #2394: implement more of the memoryview API, with the caveat that
108 only one-dimensional contiguous buffers are supported and exercised right
109 now. Slicing, slice assignment and comparison (equality and inequality)
110 have been added. Also, the tolist() method has been implemented, but only
111 for byte buffers. Endly, the API has been updated to return bytes objects
112 wherever it used to return bytearrays.
113
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000114- Issue #3560: clean up the new C PyMemoryView API so that naming is
115 internally consistent; add macros PyMemoryView_GET_BASE() and
116 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
117 without relying on a particular implementation; remove the ill-named
118 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
119
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000120- ctypes function pointers that are COM methods have a boolean True
121 value again.
122
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000123- Issue #1819: function calls with several named parameters are now on
124 average 35% faster (as measured by pybench).
125
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000126- The undocumented C APIs PyUnicode_AsString() and
127 PyUnicode_AsStringAndSize() were made private to the interpreter, in
128 order to be able to refine their interfaces for Python 3.1.
129
130 If you need to access the UTF-8 representation of a Unicode object
131 as bytes string, please use PyUnicode_AsUTF8String() instead.
132
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000133- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
134 to Python 3.0's stricter semantics which allow to avoid successive
135 reallocations of the result string (this also affects str.join()).
136
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000137
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000138Library
139-------
140
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000141- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
142 a build problem on MacOS with CJK locales. It adds four temporary
143 mappings to existing legacy codecs that are virtually compatible
144 with Mac encodings. They will be replaced by codecs correctly
145 implemented in 3.1.
146
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000147- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
148 "global name 'header' is not defined".
149
Antoine Pitroufd036452008-08-19 17:56:33 +0000150- Issue #2834: update the regular expression library to match the unicode
151 standards of py3k. In other words, mixing bytes and unicode strings
152 (be it as pattern, search string or replacement string) raises a TypeError.
153 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
154 and can be disabled by specifying a new re.ASCII flag; as for bytes
155 patterns, ASCII matching is the only option and trying to specify re.UNICODE
156 for such patterns raises a ValueError.
157
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000158- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
159 Code contributed by Matt Giuca. quote() now encodes the input
160 before quoting, unquote() decodes after unquoting. There are
161 new arguments to change the encoding and errors settings.
162 There are also new APIs to skip the encode/decode steps.
163 [un]quote_plus() are also affected.
164
Nick Coghlan36f49522008-08-18 12:31:52 +0000165- Issue #2235: numbers.Number now blocks inheritance of the default id()
166 based hash because that hash mechanism is not correct for numeric types.
167 All concrete numeric types that inherit from Number (rather than just
168 registering with it) must explicitly provide a hash implementation in
169 order for their instances to be hashable.
170
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000171- Issue #2676: in the email package, content-type parsing was hanging on
172 pathological input because of quadratic or exponential behaviour of a
173 regular expression.
174
Antoine Pitrou87695762008-08-14 22:44:29 +0000175- Issue #3476: binary buffered reading through the new "io" library is now
176 thread-safe.
177
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000178- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
179 menu entries were not deleted.
180
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000181- Remove the TarFileCompat class from tarfile.py.
182
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000183- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
184 accepts the same parameters. It just checks that its first argument is an
185 integer.
186
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000187- Issue #3394: zipfile.writestr sets external attributes when passed a
188 file name rather than a ZipInfo instance, so files are extracted with
189 mode 0600 rather than 000 under Unix.
190
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000191- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
192 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000193
Martin v. Löwis371bb502008-08-16 13:02:57 +0000194Extension Modules
195-----------------
196
197- Bug #3542: Support Unicode strings in _msi module.
198
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000199What's new in Python 3.0b2?
200===========================
201
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000202*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000203
204Core and Builtins
205-----------------
206
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000207- Issue #3008: the float type has a new instance method 'float.hex'
208 and a new class method 'float.fromhex' to convert floating-point
209 numbers to and from hexadecimal strings, respectively.
210
Eric Smithd68af8f2008-07-16 00:15:35 +0000211- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
212 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
213
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000214- Issue #3280: like chr(), the "%c" format now accepts unicode code points
215 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
216 "narrow Unicode" builds, the result is a string of 2 code units, forming a
217 UTF-16 surrogate pair.
218
Georg Brandld52429f2008-07-04 15:55:02 +0000219- Issue #3282: str.isprintable() should return False for undefined
220 Unicode characters.
221
Martin v. Löwis029656f2008-06-30 04:06:08 +0000222- Issue #3236: Return small longs from PyLong_FromString.
223
Benjamin Petersone6528212008-07-15 15:32:09 +0000224- Exception tracebacks now support exception chaining.
225
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000226Library
227-------
228
Brett Cannonc2542e92008-07-25 18:19:20 +0000229- Removed the sunaudio module. Use sunau instead.
230
Thomas Heller47bc8092008-08-19 06:38:12 +0000231- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
232 api functions without holding the GIL, which could lead to a fatal
233 error when they failed.
234
235- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
236
Georg Brandl30704ea02008-07-23 15:07:12 +0000237- Removed "ast" function aliases from the parser module.
238
Thomas Heller15383a02008-07-15 19:46:52 +0000239- Issue #3313: Fixed a crash when a failed dlopen() call does not set
240 a valid dlerror() message.
241
Thomas Heller0261e1e2008-07-15 17:25:07 +0000242- Issue #3258: Fixed a crash when a ctypes POINTER type to an
243 incomplete structure was created.
244
Georg Brandl1abcbf82008-07-01 19:28:43 +0000245- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
246 argument now must be a bytes object in any case.
247
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000248- Issue #3145: help("modules whatever") failed when trying to load the source
249 code of every single module of the standard library, including invalid files
250 used in the test suite.
251
Georg Brandlbded4d32008-07-17 18:15:35 +0000252- The gettext library now consistently uses Unicode strings for message ids
253 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000254
Benjamin Petersone6528212008-07-15 15:32:09 +0000255- The traceback module has been expanded to handle chained exceptions.
256
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000257C API
258-----
259
260- Issue #3247: the function Py_FindMethod was removed. Modern types should
261 use the tp_methods slot instead.
262
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000263Tools/Demos
264-----------
265
Georg Brandl336341f2008-07-01 20:21:28 +0000266- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000267
Georg Brandl336341f2008-07-01 20:21:28 +0000268- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000269
270
Brett Cannon0d71ee72008-05-08 18:13:40 +0000271What's new in Python 3.0b1?
272===========================
273
Barry Warsawc1e689e2008-06-19 00:35:43 +0000274*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000275
276Core and Builtins
277-----------------
278
Brett Cannondb734912008-06-27 00:52:15 +0000279- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
280 argument being anything other than a dict or None. Also fixed a bug in error
281 handling when 'message' and 'category' were both set to None, triggering a
282 bus error.
283
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000284- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
285 holds the last (strong) reference to its referent.
286
Georg Brandl559e5d72008-06-11 18:37:52 +0000287- Issue #2630: implement PEP 3138. repr() now returns printable
288 Unicode characters unescaped, to get an ASCII-only representation
289 of an object use ascii().
290
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000291- Issue #1342: On windows, Python could not start when installed in a
292 directory with non-ascii characters.
293
Martin v. Löwis1a214512008-06-11 05:26:20 +0000294- Implement PEP 3121: new module initialization and finalization API.
295
Georg Brandle1b5ac62008-06-04 13:06:58 +0000296- Removed the already-defunct ``-t`` option.
297
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000298- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
299 unmarshalling many code objects, which happens when importing a
300 large .pyc file (~1000 functions).
301
Georg Brandl52b92cc2008-05-25 09:43:03 +0000302- Issue #2963: fix merging oversight that disabled method cache for
303 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000304
Georg Brandlc9b09532008-05-25 09:24:38 +0000305- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
306
Georg Brandl52b92cc2008-05-25 09:43:03 +0000307- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000308
Georg Brandl52b92cc2008-05-25 09:43:03 +0000309- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
310 code now allows any unicode string and returns a utf-8 encoded
311 buffer, just like the "s#" code already does. The "z" code was
312 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000313
Georg Brandl52b92cc2008-05-25 09:43:03 +0000314- Issue #2863: generators now have a ``gen.__name__`` attribute that
315 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
316 ``func.func_code.co_name``. The repr() of a generator now also
317 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000318
319- Issue #2831: enumerate() now has a ``start`` argument.
320
Georg Brandl52b92cc2008-05-25 09:43:03 +0000321- Issue #2801: fix bug in the float.is_integer method where a
322 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000323
Georg Brandl52b92cc2008-05-25 09:43:03 +0000324- The ``--with-toolbox-glue`` option (and the associated
325 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000326
Georg Brandl52b92cc2008-05-25 09:43:03 +0000327- Issue #2196: hasattr() now lets exceptions which do not inherit
328 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
329 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000330
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000331- #3021 Exception reraising sematics have been significantly improved. However,
332 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
333 code anymore.
334
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000335- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
336 removed.
337
Brett Cannon0d71ee72008-05-08 18:13:40 +0000338Extension Modules
339-----------------
340
Georg Brandl38feaf02008-05-25 07:45:51 +0000341- Renamed ``_winreg`` module to ``winreg``.
342
Georg Brandl52b92cc2008-05-25 09:43:03 +0000343- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
344 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000345
346- Support for Windows 9x has been removed from the winsound module.
347
Georg Brandl52b92cc2008-05-25 09:43:03 +0000348- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000349
Brett Cannon0d71ee72008-05-08 18:13:40 +0000350Library
351-------
352
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000353- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
354 symtable.Symbol have been removed.
355
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000356- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
357
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000358- a new ``urllib`` package was created. It consists of code from
359 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
360 modules have all been removed. The new package has five submodules:
361 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
362 ``urllib.error``, and ``urllib.robotparser``. The
363 ``urllib.request.urlopen()`` function uses the url opener from
364 ``urllib2``. (Note that the unittests have not been renamed for the
365 beta, but they will be renamed in the future.)
366
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000367- rfc822 has been removed in favor of the email package.
368
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000369- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000370
Barry Warsawf5019422008-06-12 02:42:00 +0000371- Patch #2849: Remove use of rfc822 module from standard library.
372
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000373- Added C optimized implementation of io.StringIO.
374
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000375- The ``pickle`` module is now automatically use an optimized C
376 implementation of Pickler and Unpickler when available. The
377 ``cPickle`` module is no longer needed.
378
Georg Brandl877b10a2008-06-01 21:25:55 +0000379- Removed the ``htmllib`` and ``sgmllib`` modules.
380
Georg Brandl61013952008-05-28 15:56:30 +0000381- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
382 been removed from ``http.cookies``.
383
Brett Cannona23810f2008-05-26 19:04:21 +0000384- The ``commands`` module has been removed. Its getoutput() and
385 getstatusoutput() functions have been moved to the ``subprocess`` module.
386
Georg Brandl3d5c4252008-05-26 18:03:26 +0000387- The ``http`` package was created; it contains the old ``httplib``
388 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
389 as ``http.cookiejar``, and the content of the three ``HTTPServer``
390 modules as ``http.server``.
391
Georg Brandl38eceaa2008-05-26 11:14:17 +0000392- The ``xmlrpc`` package was created; it contains the old
393 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
394 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000395 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000396
397- The ``dbm`` package was created, containing the old modules
398 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
399 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
400 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
401 as submodules.
402
Georg Brandl52b92cc2008-05-25 09:43:03 +0000403- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000404
Georg Brandl52b92cc2008-05-25 09:43:03 +0000405- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000406
Georg Brandl52b92cc2008-05-25 09:43:03 +0000407- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000408
Georg Brandl52b92cc2008-05-25 09:43:03 +0000409- Issue #2250: Exceptions raised during evaluation of names in
410 rlcompleter's ``Completer.complete()`` method are now caught and
411 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000412
Georg Brandl52b92cc2008-05-25 09:43:03 +0000413- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
414 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000415
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000416- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
417 large to fit in a C long. ldexp(x, n) now returns a zero (with
418 suitable sign) if n is large and negative; previously, it raised
419 OverflowError.
420
Georg Brandl52b92cc2008-05-25 09:43:03 +0000421- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000422
Georg Brandl52b92cc2008-05-25 09:43:03 +0000423- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000424
Georg Brandl52b92cc2008-05-25 09:43:03 +0000425- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000426
Georg Brandl52b92cc2008-05-25 09:43:03 +0000427- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000428
Georg Brandl52b92cc2008-05-25 09:43:03 +0000429- Fixed the ``__all__`` setting on ``collections`` to include
430 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000431
Brett Cannoncf3520c2008-05-11 22:47:58 +0000432- The sre module has been removed.
433
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000434- The Queue module has been renamed to queue.
435
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000436- The copy_reg module has been renamed to copyreg.
437
Brett Cannond8b61ee2008-05-11 03:00:26 +0000438- The mhlib module has been removed.
439
Brett Cannonbd474422008-05-10 22:42:14 +0000440- The ihooks module has been removed.
441
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000442- The fpformat module has been removed.
443
Brett Cannonf4fd9932008-05-10 21:11:46 +0000444- The dircache module has been removed.
445
Brett Cannond175b4c2008-05-10 03:19:54 +0000446- The Canvas module has been removed.
447
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000448- The Decimal module gained the magic methods __round__, __ceil__,
449 __floor__ and __trunc__, to give support for round, math.ceil,
450 math.floor and math.trunc.
451
Brett Cannon900ee3a2008-05-08 20:31:11 +0000452- The user module has been removed.
453
Brett Cannon34afe872008-05-08 20:31:44 +0000454- The mutex module has been removed.
455
Brett Cannon0d71ee72008-05-08 18:13:40 +0000456- The imputil module has been removed.
457
Georg Brandl52b92cc2008-05-25 09:43:03 +0000458- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000459
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000460- pdb gained the "until" command.
461
Georg Brandl52b92cc2008-05-25 09:43:03 +0000462- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000463
Georg Brandl32de7af2008-08-18 23:07:41 +0000464- The threading module API was renamed to be PEP 8 compliant. The
465 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000466
Georg Brandl294d5a92008-06-01 19:25:32 +0000467Tools/Demos
468-----------
469
470- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000471
Brett Cannon0d71ee72008-05-08 18:13:40 +0000472Build
473-----
474
475
Barry Warsaw66079cd2008-04-04 01:36:36 +0000476What's New in Python 3.0a5?
477===========================
478
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000479*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000480
481Core and Builtins
482-----------------
483
Georg Brandl52b92cc2008-05-25 09:43:03 +0000484- Fixed misbehaviour of PyLong_FromSsize_t on systems where
485 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000486
Georg Brandl52b92cc2008-05-25 09:43:03 +0000487- Issue #2221: Corrected a SystemError "error return without exception
488 set", when the code executed by exec() raises an exception, and
489 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000490
Georg Brandl52b92cc2008-05-25 09:43:03 +0000491- Bug #2565: The repr() of type objects now calls them 'class', not
492 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000493
Martin v. Löwis790465f2008-04-05 20:41:37 +0000494- The command line processing was converted to pass Unicode strings
495 through as unmodified as possible; as a consequence, the C API
496 related to command line arguments was changed to use wchar_t.
497
Georg Brandl52b92cc2008-05-25 09:43:03 +0000498- All backslashes in raw strings are interpreted literally. This
499 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000500
Barry Warsaw66079cd2008-04-04 01:36:36 +0000501Extension Modules
502-----------------
503
504Library
505-------
506
Georg Brandl52b92cc2008-05-25 09:43:03 +0000507- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000508
Thomas Hellere106dc32008-04-24 18:39:36 +0000509- Issue #2682: ctypes callback functions now longer contain a cyclic
510 reference to themselves.
511
Georg Brandl52b92cc2008-05-25 09:43:03 +0000512- Issue #2058: Remove the buf attribute and add __slots__ to the
513 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000514
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000515- Bug #2606: Avoid calling .sort() on a dict_keys object.
516
Thomas Hellerbff533b2008-04-04 19:53:14 +0000517- The bundled libffi copy is now in sync with the recently released
518 libffi3.0.5 version, apart from some small changes to
519 Modules/_ctypes/libffi/configure.ac.
520
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000521Build
522-----
523
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000524- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
525
Guido van Rossumdc21db32008-04-07 18:37:41 +0000526- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000527 accidentally overwriting a Python 2.x installation. Use "make
528 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000529
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000530- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
531 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000532
Georg Brandl52b92cc2008-05-25 09:43:03 +0000533
Barry Warsawa9d499d2008-03-01 18:38:07 +0000534What's New in Python 3.0a4?
535===========================
536
Barry Warsawbb5cd082008-04-02 23:33:27 +0000537*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000538
Martin v. Löwis25931462008-03-17 20:43:42 +0000539Core and Builtins
540-----------------
541
542- Bug #2301: Don't try decoding the source code into the original
543 encoding for syntax errors.
544
Martin v. Löwis92fab752008-03-08 10:40:41 +0000545Extension Modules
546-----------------
547
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000548- The dl module was removed, use the ctypes module instead.
549
Martin v. Löwis92fab752008-03-08 10:40:41 +0000550- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000551
Martin v. Löwis071ef772008-03-08 11:24:24 +0000552Library
553-------
554
Georg Brandl52b92cc2008-05-25 09:43:03 +0000555- The class distutils.commands.build_py.build_py_2to3 can be used as a
556 build_py replacement to automatically run 2to3 on modules that are
557 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000558
Guido van Rossumf4169812008-03-17 22:56:06 +0000559- A new pickle protocol (protocol 3) is added with explicit support
560 for bytes. This is the default protocol. It intentionally cannot
561 be unpickled by Python 2.x.
562
563- When a pickle written by Python 2.x contains an (8-bit) str
564 instance, this is now decoded to a (Unicode) str instance. The
565 encoding used to do this defaults to ASCII, but can be overridden
566 via two new keyword arguments to the Unpickler class. Previously
567 this would create bytes instances, which is usually wrong: str
568 instances are often used to pickle attribute names etc., and text is
569 more common than binary data anyway.
570
Martin v. Löwis071ef772008-03-08 11:24:24 +0000571- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000572 system doesn't support CODESET and LANG isn't set or doesn't allow
573 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000574
Georg Brandl52b92cc2008-05-25 09:43:03 +0000575- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
576 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000577
Georg Brandl52b92cc2008-05-25 09:43:03 +0000578- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
579 has been renamed tokenize and now works with bytes rather than
580 strings. A new detect_encoding function has been added for
581 determining source file encoding according to PEP-0263. Token
582 sequences returned by tokenize always start with an ENCODING token
583 which specifies the encoding used to decode the file. This token is
584 used to encode the output of untokenize back to bytes.
585
Barry Warsawa9d499d2008-03-01 18:38:07 +0000586
Christian Heimesbc873412007-12-08 22:11:32 +0000587What's New in Python 3.0a3?
588===========================
589
Barry Warsaw659fc422008-03-01 17:45:23 +0000590*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000591
592Core and Builtins
593-----------------
594
Georg Brandl52b92cc2008-05-25 09:43:03 +0000595- Issue #2282: io.TextIOWrapper was not overriding seekable() from
596 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000597
Georg Brandl52b92cc2008-05-25 09:43:03 +0000598- Issue #2115: Important speedup in setting __slot__ attributes. Also
599 prevent a possible crash: an Abstract Base Class would try to access
600 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000601
Georg Brandl52b92cc2008-05-25 09:43:03 +0000602- Fixed repr() and str() of complex numbers with infinity or nan as
603 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000604
Georg Brandl52b92cc2008-05-25 09:43:03 +0000605- Clear all free list during a gc.collect() of the highest generation
606 in order to allow pymalloc to free more arenas. Python may give back
607 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000608
Georg Brandl52b92cc2008-05-25 09:43:03 +0000609- Issue #2045: Fix an infinite recursion triggered when printing a
610 subclass of collections.defaultdict, if its default_factory is set
611 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000612
613- Fixed a minor memory leak in dictobject.c. The content of the free
614 list was not freed on interpreter shutdown.
615
Georg Brandl52b92cc2008-05-25 09:43:03 +0000616- Limit free list of method and builtin function objects to 256
617 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000618
Georg Brandl52b92cc2008-05-25 09:43:03 +0000619- Patch #1953: Added ``sys._compact_freelists()`` and the C API
620 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000621 to compact the internal free lists of pre-allocted ints and floats.
622
623- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000624 Python expected the return type int but the fork familie returns
625 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000626
Georg Brandl52b92cc2008-05-25 09:43:03 +0000627- Issue #1678380: Fix a bug that identifies 0j and -0j when they
628 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000629
Georg Brandl52b92cc2008-05-25 09:43:03 +0000630- Issue #2025: Added tuple.count() and tuple.index() methods to comply
631 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000632
Georg Brandl52b92cc2008-05-25 09:43:03 +0000633- Fixed multiple reinitialization of the Python interpreter. The small
634 int list in longobject.c has caused a seg fault during the third
635 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000636
Georg Brandl52b92cc2008-05-25 09:43:03 +0000637- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000638
Georg Brandl52b92cc2008-05-25 09:43:03 +0000639- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000640
Georg Brandl52b92cc2008-05-25 09:43:03 +0000641- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000642
Georg Brandl52b92cc2008-05-25 09:43:03 +0000643- map() no longer accepts None for the first argument. Use zip()
644 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000645
Facundo Batista2336bdd2008-01-19 19:12:01 +0000646- Issue #1769: Now int("- 1") is not allowed any more.
647
Georg Brandl52b92cc2008-05-25 09:43:03 +0000648- Object/longobject.c: long(float('nan')) raises an OverflowError
649 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000650
Georg Brandl52b92cc2008-05-25 09:43:03 +0000651- Issue #1762972: __file__ points to the source file instead of the
652 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000653
Guido van Rossumab078dd2008-01-06 00:09:11 +0000654- Issue #1393: object_richcompare() returns NotImplemented instead of
655 False if the objects aren't equal, to give the other side a chance.
656
Guido van Rossume239b002008-01-06 00:44:20 +0000657- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000658
Georg Brandl52b92cc2008-05-25 09:43:03 +0000659- Improve some exception messages when Windows fails to load an
660 extension module. Now we get for example '%1 is not a valid Win32
661 application' instead of 'error code 193'. Also use Unicode strings
662 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000663
Georg Brandl52b92cc2008-05-25 09:43:03 +0000664- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
665 Python C API has gained a new type *PyInstanceMethod_Type* and the
666 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
667 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000668
Georg Brandl52b92cc2008-05-25 09:43:03 +0000669- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
670 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
671 are now enough to print the corresponding list of objects considered
672 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000673
Georg Brandl52b92cc2008-05-25 09:43:03 +0000674- Issue #1573: Improper use of the keyword-only syntax makes the
675 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000676
Georg Brandl52b92cc2008-05-25 09:43:03 +0000677- Issue #1564: The set implementation should special-case PyUnicode
678 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000679
Guido van Rossumea6775b2008-02-21 20:16:31 +0000680- Patch #1031213: Decode source line in SyntaxErrors back to its
681 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000682
Christian Heimes09aaa882008-02-23 15:01:06 +0000683- inspect.getsource() includes the decorators again.
684
Guido van Rossumea6775b2008-02-21 20:16:31 +0000685- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
686 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000687
Georg Brandl52b92cc2008-05-25 09:43:03 +0000688- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
689 the first chunk fed to the decoder started with a BOM, but was
690 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000691
Christian Heimesbc873412007-12-08 22:11:32 +0000692Extension Modules
693-----------------
694
Georg Brandl52b92cc2008-05-25 09:43:03 +0000695- Code for itertools ifilter(), imap(), and izip() moved to bultins
696 and renamed to filter(), map(), and zip(). Also, renamed
697 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000698
Georg Brandl52b92cc2008-05-25 09:43:03 +0000699- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000700
Georg Brandl52b92cc2008-05-25 09:43:03 +0000701- Bug #2111: mmap segfaults when trying to write a block opened with
702 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000703
Georg Brandl52b92cc2008-05-25 09:43:03 +0000704- Issue #2063: correct order of utime and stime in os.times() result
705 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000706
Christian Heimesbc873412007-12-08 22:11:32 +0000707Library
708-------
709
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000710- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000711
Georg Brandl52b92cc2008-05-25 09:43:03 +0000712- Created new UserDict class in collections module. This one inherits
713 from and complies with the MutableMapping ABC. Also, moved
714 UserString and UserList to the collections module. The
715 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000716
Guido van Rossumea6775b2008-02-21 20:16:31 +0000717- Removed UserDict.DictMixin. Replaced all its uses with
718 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000719
Guido van Rossume239b002008-01-06 00:44:20 +0000720- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000721
Guido van Rossume239b002008-01-06 00:44:20 +0000722- Issue #1585: IDLE uses non-existent xrange() function.
723
724- Issue #1578: Problems in win_getpass.
725
Georg Brandl52d168a2008-01-07 18:10:24 +0000726Build
727-----
728
Georg Brandl52b92cc2008-05-25 09:43:03 +0000729- Renamed --enable-unicode configure flag to --with-wide-unicode,
730 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000731
Guido van Rossume239b002008-01-06 00:44:20 +0000732C API
733-----
734
735- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
736 Py_TYPE and Py_REFCNT.
737
Georg Brandl52b92cc2008-05-25 09:43:03 +0000738- New API PyImport_ImportModuleNoBlock(), works like
739 PyImport_ImportModule() but won't block on the import lock
740 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000741
Christian Heimesbc873412007-12-08 22:11:32 +0000742
Fred Drake0e474a82007-10-11 18:01:43 +0000743What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000744===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000745
Guido van Rossum99533a92007-12-06 05:07:41 +0000746*Release date: 07-Dec-2007*
747
748(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000749
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000750Core and Builtins
751-----------------
752
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000753- str8 now has the same construction signature as bytes.
754
Georg Brandl52b92cc2008-05-25 09:43:03 +0000755- Comparisons between str and str8 now return False/True for ==/!=.
756 sqlite3 returns str8 when recreating on object from it's __conform__
757 value. The struct module returns str8 for all string-related
758 formats. This was true before this change, but becomes more
759 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000760
Georg Brandl52b92cc2008-05-25 09:43:03 +0000761- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
762 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000763
764- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
765
766- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000767 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000768 `PyUnicode_DecodeFSDefault(char*)` was added.
769
Georg Brandl52b92cc2008-05-25 09:43:03 +0000770- io.open() and _fileio.FileIO have grown a new argument closefd. A
771 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000772
Georg Brandl52b92cc2008-05-25 09:43:03 +0000773- Added a new option -b to issues warnings (-bb for errors) about
774 certain operations between bytes/buffer and str like str(b'') and
775 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000776
Georg Brandl52b92cc2008-05-25 09:43:03 +0000777- The standards streams sys.stdin, stdout and stderr may be None when
778 the when the C runtime library returns an invalid file descriptor
779 for the streams (fileno(stdin) < 0). For now this happens only for
780 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000781
Christian Heimesbce52be2007-11-17 19:08:41 +0000782- Added PCbuild9 directory for VS 2008.
783
Georg Brandl52b92cc2008-05-25 09:43:03 +0000784- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
785 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000786
Georg Brandl52b92cc2008-05-25 09:43:03 +0000787- Unbound methods are gone for good. ClassObject.method returns an
788 ordinary function object, instance.method still returns a bound
789 method object. The API of bound methods is cleaned up, too. The
790 im_class attribute is removed and im_func + im_self are renamed to
791 __func__ and __self__. The factory PyMethod_New takes only func and
792 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000793
Georg Brandl52b92cc2008-05-25 09:43:03 +0000794- intobject.h is no longer included by Python.h. The remains were
795 moved to longobject.h. It still exists to define several aliases
796 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000797
Christian Heimesa37d4c62007-12-04 23:02:19 +0000798- Removed sys.maxint, use sys.maxsize instead.
799
Fred Drake0e474a82007-10-11 18:01:43 +0000800Extension Modules
801-----------------
802
803- The `hotshot` profiler has been removed; use `cProfile` instead.
804
Brett Cannone9fd2312007-10-12 19:18:19 +0000805Library
806-------
807
Georg Brandl52b92cc2008-05-25 09:43:03 +0000808- When loading an external file using testfile(), the passed-in
809 encoding argument was being ignored if __loader__ is defined and
810 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000811
Georg Brandl52b92cc2008-05-25 09:43:03 +0000812- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
813 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000814
Christian Heimesc9543e42007-11-28 08:28:28 +0000815- Removed the 'new' module.
816
Georg Brandl52b92cc2008-05-25 09:43:03 +0000817- Removed all types from the 'types' module that are easily accessable
818 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000819
Georg Brandl52d168a2008-01-07 18:10:24 +0000820
Guido van Rossum4405cf32007-08-30 17:16:55 +0000821What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000822==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000823
Guido van Rossum4405cf32007-08-30 17:16:55 +0000824*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000825
826Core and Builtins
827-----------------
828
Martin v. Löwis47383402007-08-15 07:32:56 +0000829- PEP 3131: Support non-ASCII identifiers.
830
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000831- PEP 3120: Change default encoding to UTF-8.
832
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000833- PEP 3123: Use proper C inheritance for PyObject.
834
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000835- Removed the __oct__ and __hex__ special methods and added a bin()
836 builtin function.
837
Georg Brandl52b92cc2008-05-25 09:43:03 +0000838- PEP 3127: octal literals now start with "0o". Old-style octal
839 literals are invalid. There are binary literals with a prefix of
840 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000841
Guido van Rossume7ba4952007-06-06 23:52:48 +0000842- None, True, False are now keywords.
843
Guido van Rossum29478ef2007-05-29 00:39:44 +0000844- PEP 3119: isinstance() and issubclass() can be overridden.
845
Guido van Rossumebe3e162007-05-17 18:20:34 +0000846- Remove BaseException.message.
847
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000848- Remove tuple parameter unpacking (PEP 3113).
849
Georg Brandl52b92cc2008-05-25 09:43:03 +0000850- Remove the f_restricted attribute from frames. This naturally leads
851 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000852
Georg Brandl52b92cc2008-05-25 09:43:03 +0000853- PEP 3132 was accepted. That means that you can do ``a, *b =
854 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000855
Georg Brandl52b92cc2008-05-25 09:43:03 +0000856- range() now returns an iterator rather than a list. Floats are not
857 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000858
Nick Coghlan650f0d02007-04-15 12:05:43 +0000859- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000860 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000861
Guido van Rossume27dc722007-03-27 22:37:34 +0000862- By default, != returns the opposite of ==, unless the latter returns
863 NotImplemented.
864
Georg Brandl52b92cc2008-05-25 09:43:03 +0000865- Patch #1680961: sys.exitfunc has been removed and replaced with a
866 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000867
Georg Brandl801dd732007-03-18 20:18:31 +0000868- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000869 keyword arg in the class statement, which can now use the full
870 syntax of a parameter list. Also, the metaclass can implement a
871 __prepare__ function which will be called to create the dictionary
872 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000873
Georg Brandl428f0642007-03-18 18:35:15 +0000874- The long-deprecated argument "pend" of PyFloat_FromString() has been
875 removed.
876
Georg Brandle32b4222007-03-10 22:13:27 +0000877- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000878 its argument, if it exists. If not, it will work like before. This
879 allows customizing the output of dir() in the presence of a
880 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000881
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000882- Removed support for __members__ and __methods__.
883
Georg Brandle32b4222007-03-10 22:13:27 +0000884- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000885
Georg Brandle32b4222007-03-10 22:13:27 +0000886- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000887 functionality formerly known as raw_input(); the name raw_input() is
888 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000889
Georg Brandl52b92cc2008-05-25 09:43:03 +0000890- Classes listed in an 'except' clause must inherit from
891 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000892
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000893- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000894 and .keys(), .items(), .values() return dict views, which behave
895 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000896
Guido van Rossum8b545362007-02-09 23:52:14 +0000897- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000898 'softspace' attribute of files is now gone (since print() doesn't
899 use it). A side effect of this change is that you can get
900 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000901
902 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000903 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000904
905 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000906
Brett Cannon398db8b2007-01-29 23:44:37 +0000907- PEP 3102: keyword-only arguments.
908
Georg Brandl52b92cc2008-05-25 09:43:03 +0000909- Int/Long unification is complete. The 'long' built-in type and
910 literals with trailing 'L' or 'l' have been removed. Performance
911 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000912
913- 'except E, V' must now be spelled as 'except E as V' and deletes V
914 at the end of the except clause; V must be a simple name.
915
Neal Norwitzc1505362006-12-28 06:47:50 +0000916- Added function annotations per PEP 3107.
917
Georg Brandl52b92cc2008-05-25 09:43:03 +0000918- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000919
920 >>> def f(x):
921 ... def inc():
922 ... nonlocal x
923 ... x += 1
924 ... return x
925 ... return inc
926 ...
927 >>> inc = f(0)
928 >>> inc()
929 1
930 >>> inc()
931 2
932
Georg Brandl66a796e2006-12-19 20:50:34 +0000933- Moved intern() to sys.intern().
934
935- exec is now a function.
936
937- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000938
Neal Norwitz4886cc32006-08-21 17:06:07 +0000939- Classic classes are a thing of the past. All classes are new style.
940
941- Exceptions *must* derive from BaseException.
942
943- Integer division always returns a float. The -Q option is no more.
944 All the following are gone:
945 * PyNumber_Divide and PyNumber_InPlaceDivide
946 * __div__, __rdiv__, and __idiv__
947 * nb_divide, nb_inplace_divide
948 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
949 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
950 if we want to re-use __div__ and friends. If we do, it will make
951 it harder to write code for both 2.x and 3.x.)
952
953- 'as' and 'with' are keywords.
954
955- Absolute import is the default behavior for 'import foo' etc.
956
Georg Brandl52b92cc2008-05-25 09:43:03 +0000957- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000958
Georg Brandl52b92cc2008-05-25 09:43:03 +0000959- Removed these Python builtins: apply(), callable(), coerce(),
960 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000961
Georg Brandl52b92cc2008-05-25 09:43:03 +0000962- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000963
Georg Brandl52b92cc2008-05-25 09:43:03 +0000964- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000965
966- Remove C API support for restricted execution.
967
Guido van Rossumcf1be882007-08-30 22:07:17 +0000968- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000969 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000970 sequences of unequal length -- it now stops after the shortest one
971 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000972
Georg Brandl52b92cc2008-05-25 09:43:03 +0000973- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000974
975- Added class decorators per PEP 3129.
976
977
978Extension Modules
979-----------------
980
Georg Brandl52b92cc2008-05-25 09:43:03 +0000981- Removed the imageop module. Obsolete long with its unit tests
982 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000983
Georg Brandl52b92cc2008-05-25 09:43:03 +0000984- Removed these attributes from the operator module: div, idiv,
985 __div__, __idiv__, isCallable, sequenceIncludes.
986
987- Removed these attributes from the sys module: exc_clear(), exc_type,
988 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000989
990
991Library
992-------
993
Georg Brandl52b92cc2008-05-25 09:43:03 +0000994- Removed the compiler package. Use of the _ast module and (an
995 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000996
Georg Brandl52b92cc2008-05-25 09:43:03 +0000997- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
998 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
999 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001000
Georg Brandl52b92cc2008-05-25 09:43:03 +00001001- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001002
Georg Brandl52b92cc2008-05-25 09:43:03 +00001003- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1004 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1005 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001006
Georg Brandl52b92cc2008-05-25 09:43:03 +00001007- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001008
Georg Brandl52b92cc2008-05-25 09:43:03 +00001009- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001010 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001011
Georg Brandl52b92cc2008-05-25 09:43:03 +00001012- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001013
Georg Brandl52b92cc2008-05-25 09:43:03 +00001014- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001015
1016- Patch #1680961: atexit has been reimplemented in C.
1017
Walter Dörwald41980ca2007-08-16 21:55:45 +00001018- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1019
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001020Build
1021-----
1022
1023C API
1024-----
1025
Georg Brandl52b92cc2008-05-25 09:43:03 +00001026- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001027
Georg Brandl52b92cc2008-05-25 09:43:03 +00001028- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1029 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001030
Georg Brandl52b92cc2008-05-25 09:43:03 +00001031- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001032
Georg Brandl52b92cc2008-05-25 09:43:03 +00001033- Removed these macros: staticforward, statichere, PyArg_GetInt,
1034 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001035
Georg Brandl52b92cc2008-05-25 09:43:03 +00001036- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1037 intintobjargproc, getreadbufferproc, getwritebufferproc,
1038 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001039
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001040Tests
1041-----
1042
Brett Cannone7a30f72008-03-03 03:36:27 +00001043- Removed test.testall as test.regrtest replaces it.
1044
Brett Cannonced04e02005-02-13 22:53:22 +00001045Documentation
1046-------------
1047
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001048Mac
1049---
1050
Georg Brandl52b92cc2008-05-25 09:43:03 +00001051- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001052
Guido van Rossum845702c2007-08-30 18:44:53 +00001053Platforms
1054---------
1055
1056- Support for BeOS and AtheOS was removed (according to PEP 11).
1057
1058- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1059
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001060Tools/Demos
1061-----------
1062
Georg Brandl52b92cc2008-05-25 09:43:03 +00001063
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001064**(For information about older versions, consult the HISTORY file.)**