blob: e393c06ab95eaceedc6cb9bec0a4d72356a50027 [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 Pitroufff95302008-09-03 18:58:51 +000015- Issue #3696: Error parsing arguments on OpenBSD <= 4.4 and Cygwin. On
16 these systems, the mbstowcs() function is slightly buggy and must be
17 replaced with strlen() for the purpose of counting of number of wide
18 characters needed to represent the multi-byte character string.
19
Antoine Pitrou658fad82008-09-03 18:34:34 +000020- Issue #3697: "Fatal Python error: Cannot recover from stack overflow"
21 could be easily encountered under Windows in debug mode when exercising
22 the recursion limit checking code, due to bogus handling of recursion
23 limit when USE_STACKCHEK was enabled.
24
Brett Cannon54bd41d2008-09-02 04:01:42 +000025- Issue 3639: The _warnings module could segfault the interpreter when
26 unexpected types were passed in as arguments.
27
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +000028- Issue #3712: The memoryview object had a reference leak and didn't support
29 cyclic garbage collection.
30
Antoine Pitrouf71995782008-08-29 18:37:05 +000031- Issue #3668: Fix a memory leak with the "s*" argument parser in
32 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
33 was correctly parsed but parsing of subsequent arguments failed.
34
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +000035- Issue #3611: An exception __context__ could be cleared in a complex pattern
36 involving a __del__ method re-raising an exception.
37
Antoine Pitrouec569b72008-08-26 22:40:48 +000038- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
39 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
40 mechanism. In the process, fix a bug where isinstance() and issubclass(),
41 when given a tuple of classes as second argument, were looking up
42 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
43 type object.
44
Antoine Pitroue2dffc02008-08-26 22:02:58 +000045- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
46
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +000047- Issue #3651: Fix various memory leaks when using the buffer
48 interface, or when the "s#" code of PyArg_ParseTuple is given a
49 bytes object.
50
Neal Norwitz6ae2eb22008-08-24 23:50:08 +000051- Issue #3657: Fix uninitialized memory read when pickling longs.
52 Found by valgrind.
53
Neal Norwitz3ce5d922008-08-24 07:08:55 +000054- Apply security patches from Apple.
55
Neal Norwitz2f99b242008-08-24 05:48:10 +000056- Fix crashes on memory allocation failure found with failmalloc.
57
58- Fix memory leaks found with valgrind and update suppressions file.
59
60- Fix compiler warnings in opt mode which would lead to invalid memory reads.
61
62- Fix problem using wrong name in decimal module reported by pychecker.
63
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000064- Issue #3650: Fixed a reference leak in bytes.split('x').
65
Benjamin Petersonc15a0732008-08-26 16:46:47 +000066- bytes(o) now tries to use o.__bytes__() before using fallbacks.
67
68C API
69-----
70
71- PyObject_Bytes and PyBytes_FromObject were added.
72
Barry Warsaw8509df72008-08-21 03:02:47 +000073Library
74-------
75
Benjamin Peterson6ba23322008-09-03 22:59:38 +000076- The bsddb module (and therefore the dbm.bsd module) has been removed.
Gregory P. Smith451e99b2008-09-04 04:46:48 +000077 It is now maintained outside of the standard library at
78 http://www.jcea.es/programacion/pybsddb.htm.
Benjamin Peterson6ba23322008-09-03 22:59:38 +000079
Facundo Batistac469d4c2008-09-03 22:49:01 +000080- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
81 to the urlparse one. Added a DeprecationWarning in the old module, it
82 will be deprecated in the future.
83
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +000084- Issue #3719: platform.architecture() fails if there are spaces in the
85 path to the Python binary.
86
Brett Cannonec92e182008-09-02 02:46:59 +000087- Issue 3602: As part of the merge of r66135, make the parameters on
88 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
89
Benjamin Petersonb3085c92008-09-01 23:09:31 +000090- The deprecation warnings for the camelCase threading API names were removed.
91
Jesse Noller338f5782008-09-03 18:22:19 +000092- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
93 SEM_VALUE_MAX.
94
Benjamin Peterson6784eb72008-08-23 20:32:27 +000095Extension Modules
96-----------------
97
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +000098- Issue #2975: When compiling several extension modules with Visual Studio 2008
99 from the same python interpreter, some environment variables would grow
100 without limit.
101
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000102- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
103 exploitation of poor argument checking.
104
Jesus Cea6ba33292008-08-31 14:12:11 +0000105- bsddb code updated to version 4.7.3pre2. This code is the same than
106 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
107 The Python code is automatically translated using "2to3". Please, do not
108 update this code in Python 3.0 by hand. Update the 2.6 one and then
109 do "2to3".
110
Neal Norwitz8f2f22a2008-08-24 20:59:23 +0000111Tools/Demos
112-----------
113
114- Fix Misc/gdbinit so it works.
115
Barry Warsaw8509df72008-08-21 03:02:47 +0000116
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000117What's new in Python 3.0b3?
118===========================
119
Barry Warsaw57c10582008-08-21 02:39:51 +0000120*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000121
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000122Core and Builtins
123-----------------
124
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000125- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
126 arguments.
127
Antoine Pitrou616d2852008-08-19 22:09:34 +0000128- Issue #2394: implement more of the memoryview API, with the caveat that
129 only one-dimensional contiguous buffers are supported and exercised right
130 now. Slicing, slice assignment and comparison (equality and inequality)
131 have been added. Also, the tolist() method has been implemented, but only
132 for byte buffers. Endly, the API has been updated to return bytes objects
133 wherever it used to return bytearrays.
134
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000135- Issue #3560: clean up the new C PyMemoryView API so that naming is
136 internally consistent; add macros PyMemoryView_GET_BASE() and
137 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
138 without relying on a particular implementation; remove the ill-named
139 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
140
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000141- ctypes function pointers that are COM methods have a boolean True
142 value again.
143
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000144- Issue #1819: function calls with several named parameters are now on
145 average 35% faster (as measured by pybench).
146
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000147- The undocumented C APIs PyUnicode_AsString() and
148 PyUnicode_AsStringAndSize() were made private to the interpreter, in
149 order to be able to refine their interfaces for Python 3.1.
150
151 If you need to access the UTF-8 representation of a Unicode object
152 as bytes string, please use PyUnicode_AsUTF8String() instead.
153
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000154- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
155 to Python 3.0's stricter semantics which allow to avoid successive
156 reallocations of the result string (this also affects str.join()).
157
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000158
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000159Library
160-------
161
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000162- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
163 a build problem on MacOS with CJK locales. It adds four temporary
164 mappings to existing legacy codecs that are virtually compatible
165 with Mac encodings. They will be replaced by codecs correctly
166 implemented in 3.1.
167
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000168- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
169 "global name 'header' is not defined".
170
Antoine Pitroufd036452008-08-19 17:56:33 +0000171- Issue #2834: update the regular expression library to match the unicode
172 standards of py3k. In other words, mixing bytes and unicode strings
173 (be it as pattern, search string or replacement string) raises a TypeError.
174 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
175 and can be disabled by specifying a new re.ASCII flag; as for bytes
176 patterns, ASCII matching is the only option and trying to specify re.UNICODE
177 for such patterns raises a ValueError.
178
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000179- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
180 Code contributed by Matt Giuca. quote() now encodes the input
181 before quoting, unquote() decodes after unquoting. There are
182 new arguments to change the encoding and errors settings.
183 There are also new APIs to skip the encode/decode steps.
184 [un]quote_plus() are also affected.
185
Nick Coghlan36f49522008-08-18 12:31:52 +0000186- Issue #2235: numbers.Number now blocks inheritance of the default id()
187 based hash because that hash mechanism is not correct for numeric types.
188 All concrete numeric types that inherit from Number (rather than just
189 registering with it) must explicitly provide a hash implementation in
190 order for their instances to be hashable.
191
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000192- Issue #2676: in the email package, content-type parsing was hanging on
193 pathological input because of quadratic or exponential behaviour of a
194 regular expression.
195
Antoine Pitrou87695762008-08-14 22:44:29 +0000196- Issue #3476: binary buffered reading through the new "io" library is now
197 thread-safe.
198
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000199- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
200 menu entries were not deleted.
201
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000202- Remove the TarFileCompat class from tarfile.py.
203
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000204- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
205 accepts the same parameters. It just checks that its first argument is an
206 integer.
207
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000208- Issue #3394: zipfile.writestr sets external attributes when passed a
209 file name rather than a ZipInfo instance, so files are extracted with
210 mode 0600 rather than 000 under Unix.
211
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000212- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
213 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000214
Martin v. Löwis371bb502008-08-16 13:02:57 +0000215Extension Modules
216-----------------
217
218- Bug #3542: Support Unicode strings in _msi module.
219
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000220What's new in Python 3.0b2?
221===========================
222
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000223*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000224
225Core and Builtins
226-----------------
227
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000228- Issue #3008: the float type has a new instance method 'float.hex'
229 and a new class method 'float.fromhex' to convert floating-point
230 numbers to and from hexadecimal strings, respectively.
231
Eric Smithd68af8f2008-07-16 00:15:35 +0000232- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
233 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
234
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000235- Issue #3280: like chr(), the "%c" format now accepts unicode code points
236 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
237 "narrow Unicode" builds, the result is a string of 2 code units, forming a
238 UTF-16 surrogate pair.
239
Georg Brandld52429f2008-07-04 15:55:02 +0000240- Issue #3282: str.isprintable() should return False for undefined
241 Unicode characters.
242
Martin v. Löwis029656f2008-06-30 04:06:08 +0000243- Issue #3236: Return small longs from PyLong_FromString.
244
Benjamin Petersone6528212008-07-15 15:32:09 +0000245- Exception tracebacks now support exception chaining.
246
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000247Library
248-------
249
Brett Cannonc2542e92008-07-25 18:19:20 +0000250- Removed the sunaudio module. Use sunau instead.
251
Thomas Heller47bc8092008-08-19 06:38:12 +0000252- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
253 api functions without holding the GIL, which could lead to a fatal
254 error when they failed.
255
256- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
257
Georg Brandl30704ea02008-07-23 15:07:12 +0000258- Removed "ast" function aliases from the parser module.
259
Thomas Heller15383a02008-07-15 19:46:52 +0000260- Issue #3313: Fixed a crash when a failed dlopen() call does not set
261 a valid dlerror() message.
262
Thomas Heller0261e1e2008-07-15 17:25:07 +0000263- Issue #3258: Fixed a crash when a ctypes POINTER type to an
264 incomplete structure was created.
265
Georg Brandl1abcbf82008-07-01 19:28:43 +0000266- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
267 argument now must be a bytes object in any case.
268
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000269- Issue #3145: help("modules whatever") failed when trying to load the source
270 code of every single module of the standard library, including invalid files
271 used in the test suite.
272
Georg Brandlbded4d32008-07-17 18:15:35 +0000273- The gettext library now consistently uses Unicode strings for message ids
274 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000275
Benjamin Petersone6528212008-07-15 15:32:09 +0000276- The traceback module has been expanded to handle chained exceptions.
277
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000278C API
279-----
280
281- Issue #3247: the function Py_FindMethod was removed. Modern types should
282 use the tp_methods slot instead.
283
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000284Tools/Demos
285-----------
286
Georg Brandl336341f2008-07-01 20:21:28 +0000287- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000288
Georg Brandl336341f2008-07-01 20:21:28 +0000289- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000290
291
Brett Cannon0d71ee72008-05-08 18:13:40 +0000292What's new in Python 3.0b1?
293===========================
294
Barry Warsawc1e689e2008-06-19 00:35:43 +0000295*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000296
297Core and Builtins
298-----------------
299
Brett Cannondb734912008-06-27 00:52:15 +0000300- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
301 argument being anything other than a dict or None. Also fixed a bug in error
302 handling when 'message' and 'category' were both set to None, triggering a
303 bus error.
304
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000305- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
306 holds the last (strong) reference to its referent.
307
Georg Brandl559e5d72008-06-11 18:37:52 +0000308- Issue #2630: implement PEP 3138. repr() now returns printable
309 Unicode characters unescaped, to get an ASCII-only representation
310 of an object use ascii().
311
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000312- Issue #1342: On windows, Python could not start when installed in a
313 directory with non-ascii characters.
314
Martin v. Löwis1a214512008-06-11 05:26:20 +0000315- Implement PEP 3121: new module initialization and finalization API.
316
Georg Brandle1b5ac62008-06-04 13:06:58 +0000317- Removed the already-defunct ``-t`` option.
318
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000319- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
320 unmarshalling many code objects, which happens when importing a
321 large .pyc file (~1000 functions).
322
Georg Brandl52b92cc2008-05-25 09:43:03 +0000323- Issue #2963: fix merging oversight that disabled method cache for
324 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000325
Georg Brandlc9b09532008-05-25 09:24:38 +0000326- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
327
Georg Brandl52b92cc2008-05-25 09:43:03 +0000328- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000329
Georg Brandl52b92cc2008-05-25 09:43:03 +0000330- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
331 code now allows any unicode string and returns a utf-8 encoded
332 buffer, just like the "s#" code already does. The "z" code was
333 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000334
Georg Brandl52b92cc2008-05-25 09:43:03 +0000335- Issue #2863: generators now have a ``gen.__name__`` attribute that
336 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
337 ``func.func_code.co_name``. The repr() of a generator now also
338 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000339
340- Issue #2831: enumerate() now has a ``start`` argument.
341
Georg Brandl52b92cc2008-05-25 09:43:03 +0000342- Issue #2801: fix bug in the float.is_integer method where a
343 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000344
Georg Brandl52b92cc2008-05-25 09:43:03 +0000345- The ``--with-toolbox-glue`` option (and the associated
346 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000347
Georg Brandl52b92cc2008-05-25 09:43:03 +0000348- Issue #2196: hasattr() now lets exceptions which do not inherit
349 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
350 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000351
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000352- #3021 Exception reraising sematics have been significantly improved. However,
353 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
354 code anymore.
355
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000356- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
357 removed.
358
Brett Cannon0d71ee72008-05-08 18:13:40 +0000359Extension Modules
360-----------------
361
Georg Brandl38feaf02008-05-25 07:45:51 +0000362- Renamed ``_winreg`` module to ``winreg``.
363
Georg Brandl52b92cc2008-05-25 09:43:03 +0000364- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
365 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000366
367- Support for Windows 9x has been removed from the winsound module.
368
Georg Brandl52b92cc2008-05-25 09:43:03 +0000369- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000370
Brett Cannon0d71ee72008-05-08 18:13:40 +0000371Library
372-------
373
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000374- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
375 symtable.Symbol have been removed.
376
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000377- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
378
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000379- a new ``urllib`` package was created. It consists of code from
380 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
381 modules have all been removed. The new package has five submodules:
382 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
383 ``urllib.error``, and ``urllib.robotparser``. The
384 ``urllib.request.urlopen()`` function uses the url opener from
385 ``urllib2``. (Note that the unittests have not been renamed for the
386 beta, but they will be renamed in the future.)
387
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000388- rfc822 has been removed in favor of the email package.
389
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000390- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000391
Barry Warsawf5019422008-06-12 02:42:00 +0000392- Patch #2849: Remove use of rfc822 module from standard library.
393
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000394- Added C optimized implementation of io.StringIO.
395
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000396- The ``pickle`` module is now automatically use an optimized C
397 implementation of Pickler and Unpickler when available. The
398 ``cPickle`` module is no longer needed.
399
Georg Brandl877b10a2008-06-01 21:25:55 +0000400- Removed the ``htmllib`` and ``sgmllib`` modules.
401
Georg Brandl61013952008-05-28 15:56:30 +0000402- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
403 been removed from ``http.cookies``.
404
Brett Cannona23810f2008-05-26 19:04:21 +0000405- The ``commands`` module has been removed. Its getoutput() and
406 getstatusoutput() functions have been moved to the ``subprocess`` module.
407
Georg Brandl3d5c4252008-05-26 18:03:26 +0000408- The ``http`` package was created; it contains the old ``httplib``
409 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
410 as ``http.cookiejar``, and the content of the three ``HTTPServer``
411 modules as ``http.server``.
412
Georg Brandl38eceaa2008-05-26 11:14:17 +0000413- The ``xmlrpc`` package was created; it contains the old
414 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
415 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000416 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000417
418- The ``dbm`` package was created, containing the old modules
419 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
420 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
421 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
422 as submodules.
423
Georg Brandl52b92cc2008-05-25 09:43:03 +0000424- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000425
Georg Brandl52b92cc2008-05-25 09:43:03 +0000426- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000427
Georg Brandl52b92cc2008-05-25 09:43:03 +0000428- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000429
Georg Brandl52b92cc2008-05-25 09:43:03 +0000430- Issue #2250: Exceptions raised during evaluation of names in
431 rlcompleter's ``Completer.complete()`` method are now caught and
432 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000433
Georg Brandl52b92cc2008-05-25 09:43:03 +0000434- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
435 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000436
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000437- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
438 large to fit in a C long. ldexp(x, n) now returns a zero (with
439 suitable sign) if n is large and negative; previously, it raised
440 OverflowError.
441
Georg Brandl52b92cc2008-05-25 09:43:03 +0000442- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000443
Georg Brandl52b92cc2008-05-25 09:43:03 +0000444- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000445
Georg Brandl52b92cc2008-05-25 09:43:03 +0000446- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000447
Georg Brandl52b92cc2008-05-25 09:43:03 +0000448- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000449
Georg Brandl52b92cc2008-05-25 09:43:03 +0000450- Fixed the ``__all__`` setting on ``collections`` to include
451 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000452
Brett Cannoncf3520c2008-05-11 22:47:58 +0000453- The sre module has been removed.
454
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000455- The Queue module has been renamed to queue.
456
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000457- The copy_reg module has been renamed to copyreg.
458
Brett Cannond8b61ee2008-05-11 03:00:26 +0000459- The mhlib module has been removed.
460
Brett Cannonbd474422008-05-10 22:42:14 +0000461- The ihooks module has been removed.
462
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000463- The fpformat module has been removed.
464
Brett Cannonf4fd9932008-05-10 21:11:46 +0000465- The dircache module has been removed.
466
Brett Cannond175b4c2008-05-10 03:19:54 +0000467- The Canvas module has been removed.
468
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000469- The Decimal module gained the magic methods __round__, __ceil__,
470 __floor__ and __trunc__, to give support for round, math.ceil,
471 math.floor and math.trunc.
472
Brett Cannon900ee3a2008-05-08 20:31:11 +0000473- The user module has been removed.
474
Brett Cannon34afe872008-05-08 20:31:44 +0000475- The mutex module has been removed.
476
Brett Cannon0d71ee72008-05-08 18:13:40 +0000477- The imputil module has been removed.
478
Georg Brandl52b92cc2008-05-25 09:43:03 +0000479- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000480
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000481- pdb gained the "until" command.
482
Georg Brandl52b92cc2008-05-25 09:43:03 +0000483- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000484
Georg Brandl32de7af2008-08-18 23:07:41 +0000485- The threading module API was renamed to be PEP 8 compliant. The
486 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000487
Georg Brandl294d5a92008-06-01 19:25:32 +0000488Tools/Demos
489-----------
490
491- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000492
Brett Cannon0d71ee72008-05-08 18:13:40 +0000493Build
494-----
495
496
Barry Warsaw66079cd2008-04-04 01:36:36 +0000497What's New in Python 3.0a5?
498===========================
499
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000500*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000501
502Core and Builtins
503-----------------
504
Georg Brandl52b92cc2008-05-25 09:43:03 +0000505- Fixed misbehaviour of PyLong_FromSsize_t on systems where
506 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000507
Georg Brandl52b92cc2008-05-25 09:43:03 +0000508- Issue #2221: Corrected a SystemError "error return without exception
509 set", when the code executed by exec() raises an exception, and
510 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000511
Georg Brandl52b92cc2008-05-25 09:43:03 +0000512- Bug #2565: The repr() of type objects now calls them 'class', not
513 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000514
Martin v. Löwis790465f2008-04-05 20:41:37 +0000515- The command line processing was converted to pass Unicode strings
516 through as unmodified as possible; as a consequence, the C API
517 related to command line arguments was changed to use wchar_t.
518
Georg Brandl52b92cc2008-05-25 09:43:03 +0000519- All backslashes in raw strings are interpreted literally. This
520 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000521
Barry Warsaw66079cd2008-04-04 01:36:36 +0000522Extension Modules
523-----------------
524
525Library
526-------
527
Georg Brandl52b92cc2008-05-25 09:43:03 +0000528- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000529
Thomas Hellere106dc32008-04-24 18:39:36 +0000530- Issue #2682: ctypes callback functions now longer contain a cyclic
531 reference to themselves.
532
Georg Brandl52b92cc2008-05-25 09:43:03 +0000533- Issue #2058: Remove the buf attribute and add __slots__ to the
534 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000535
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000536- Bug #2606: Avoid calling .sort() on a dict_keys object.
537
Thomas Hellerbff533b2008-04-04 19:53:14 +0000538- The bundled libffi copy is now in sync with the recently released
539 libffi3.0.5 version, apart from some small changes to
540 Modules/_ctypes/libffi/configure.ac.
541
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000542Build
543-----
544
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000545- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
546
Guido van Rossumdc21db32008-04-07 18:37:41 +0000547- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000548 accidentally overwriting a Python 2.x installation. Use "make
549 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000550
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000551- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
552 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000553
Georg Brandl52b92cc2008-05-25 09:43:03 +0000554
Barry Warsawa9d499d2008-03-01 18:38:07 +0000555What's New in Python 3.0a4?
556===========================
557
Barry Warsawbb5cd082008-04-02 23:33:27 +0000558*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000559
Martin v. Löwis25931462008-03-17 20:43:42 +0000560Core and Builtins
561-----------------
562
563- Bug #2301: Don't try decoding the source code into the original
564 encoding for syntax errors.
565
Martin v. Löwis92fab752008-03-08 10:40:41 +0000566Extension Modules
567-----------------
568
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000569- The dl module was removed, use the ctypes module instead.
570
Martin v. Löwis92fab752008-03-08 10:40:41 +0000571- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000572
Martin v. Löwis071ef772008-03-08 11:24:24 +0000573Library
574-------
575
Georg Brandl52b92cc2008-05-25 09:43:03 +0000576- The class distutils.commands.build_py.build_py_2to3 can be used as a
577 build_py replacement to automatically run 2to3 on modules that are
578 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000579
Guido van Rossumf4169812008-03-17 22:56:06 +0000580- A new pickle protocol (protocol 3) is added with explicit support
581 for bytes. This is the default protocol. It intentionally cannot
582 be unpickled by Python 2.x.
583
584- When a pickle written by Python 2.x contains an (8-bit) str
585 instance, this is now decoded to a (Unicode) str instance. The
586 encoding used to do this defaults to ASCII, but can be overridden
587 via two new keyword arguments to the Unpickler class. Previously
588 this would create bytes instances, which is usually wrong: str
589 instances are often used to pickle attribute names etc., and text is
590 more common than binary data anyway.
591
Martin v. Löwis071ef772008-03-08 11:24:24 +0000592- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000593 system doesn't support CODESET and LANG isn't set or doesn't allow
594 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000595
Georg Brandl52b92cc2008-05-25 09:43:03 +0000596- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
597 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000598
Georg Brandl52b92cc2008-05-25 09:43:03 +0000599- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
600 has been renamed tokenize and now works with bytes rather than
601 strings. A new detect_encoding function has been added for
602 determining source file encoding according to PEP-0263. Token
603 sequences returned by tokenize always start with an ENCODING token
604 which specifies the encoding used to decode the file. This token is
605 used to encode the output of untokenize back to bytes.
606
Barry Warsawa9d499d2008-03-01 18:38:07 +0000607
Christian Heimesbc873412007-12-08 22:11:32 +0000608What's New in Python 3.0a3?
609===========================
610
Barry Warsaw659fc422008-03-01 17:45:23 +0000611*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000612
613Core and Builtins
614-----------------
615
Georg Brandl52b92cc2008-05-25 09:43:03 +0000616- Issue #2282: io.TextIOWrapper was not overriding seekable() from
617 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000618
Georg Brandl52b92cc2008-05-25 09:43:03 +0000619- Issue #2115: Important speedup in setting __slot__ attributes. Also
620 prevent a possible crash: an Abstract Base Class would try to access
621 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000622
Georg Brandl52b92cc2008-05-25 09:43:03 +0000623- Fixed repr() and str() of complex numbers with infinity or nan as
624 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000625
Georg Brandl52b92cc2008-05-25 09:43:03 +0000626- Clear all free list during a gc.collect() of the highest generation
627 in order to allow pymalloc to free more arenas. Python may give back
628 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000629
Georg Brandl52b92cc2008-05-25 09:43:03 +0000630- Issue #2045: Fix an infinite recursion triggered when printing a
631 subclass of collections.defaultdict, if its default_factory is set
632 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000633
634- Fixed a minor memory leak in dictobject.c. The content of the free
635 list was not freed on interpreter shutdown.
636
Georg Brandl52b92cc2008-05-25 09:43:03 +0000637- Limit free list of method and builtin function objects to 256
638 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000639
Georg Brandl52b92cc2008-05-25 09:43:03 +0000640- Patch #1953: Added ``sys._compact_freelists()`` and the C API
641 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000642 to compact the internal free lists of pre-allocted ints and floats.
643
644- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000645 Python expected the return type int but the fork familie returns
646 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000647
Georg Brandl52b92cc2008-05-25 09:43:03 +0000648- Issue #1678380: Fix a bug that identifies 0j and -0j when they
649 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000650
Georg Brandl52b92cc2008-05-25 09:43:03 +0000651- Issue #2025: Added tuple.count() and tuple.index() methods to comply
652 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000653
Georg Brandl52b92cc2008-05-25 09:43:03 +0000654- Fixed multiple reinitialization of the Python interpreter. The small
655 int list in longobject.c has caused a seg fault during the third
656 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000657
Georg Brandl52b92cc2008-05-25 09:43:03 +0000658- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000659
Georg Brandl52b92cc2008-05-25 09:43:03 +0000660- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000661
Georg Brandl52b92cc2008-05-25 09:43:03 +0000662- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000663
Georg Brandl52b92cc2008-05-25 09:43:03 +0000664- map() no longer accepts None for the first argument. Use zip()
665 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000666
Facundo Batista2336bdd2008-01-19 19:12:01 +0000667- Issue #1769: Now int("- 1") is not allowed any more.
668
Georg Brandl52b92cc2008-05-25 09:43:03 +0000669- Object/longobject.c: long(float('nan')) raises an OverflowError
670 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000671
Georg Brandl52b92cc2008-05-25 09:43:03 +0000672- Issue #1762972: __file__ points to the source file instead of the
673 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000674
Guido van Rossumab078dd2008-01-06 00:09:11 +0000675- Issue #1393: object_richcompare() returns NotImplemented instead of
676 False if the objects aren't equal, to give the other side a chance.
677
Guido van Rossume239b002008-01-06 00:44:20 +0000678- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000679
Georg Brandl52b92cc2008-05-25 09:43:03 +0000680- Improve some exception messages when Windows fails to load an
681 extension module. Now we get for example '%1 is not a valid Win32
682 application' instead of 'error code 193'. Also use Unicode strings
683 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000684
Georg Brandl52b92cc2008-05-25 09:43:03 +0000685- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
686 Python C API has gained a new type *PyInstanceMethod_Type* and the
687 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
688 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000689
Georg Brandl52b92cc2008-05-25 09:43:03 +0000690- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
691 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
692 are now enough to print the corresponding list of objects considered
693 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000694
Georg Brandl52b92cc2008-05-25 09:43:03 +0000695- Issue #1573: Improper use of the keyword-only syntax makes the
696 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000697
Georg Brandl52b92cc2008-05-25 09:43:03 +0000698- Issue #1564: The set implementation should special-case PyUnicode
699 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000700
Guido van Rossumea6775b2008-02-21 20:16:31 +0000701- Patch #1031213: Decode source line in SyntaxErrors back to its
702 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000703
Christian Heimes09aaa882008-02-23 15:01:06 +0000704- inspect.getsource() includes the decorators again.
705
Guido van Rossumea6775b2008-02-21 20:16:31 +0000706- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
707 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000708
Georg Brandl52b92cc2008-05-25 09:43:03 +0000709- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
710 the first chunk fed to the decoder started with a BOM, but was
711 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000712
Christian Heimesbc873412007-12-08 22:11:32 +0000713Extension Modules
714-----------------
715
Georg Brandl52b92cc2008-05-25 09:43:03 +0000716- Code for itertools ifilter(), imap(), and izip() moved to bultins
717 and renamed to filter(), map(), and zip(). Also, renamed
718 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000719
Georg Brandl52b92cc2008-05-25 09:43:03 +0000720- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000721
Georg Brandl52b92cc2008-05-25 09:43:03 +0000722- Bug #2111: mmap segfaults when trying to write a block opened with
723 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000724
Georg Brandl52b92cc2008-05-25 09:43:03 +0000725- Issue #2063: correct order of utime and stime in os.times() result
726 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000727
Christian Heimesbc873412007-12-08 22:11:32 +0000728Library
729-------
730
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000731- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000732
Georg Brandl52b92cc2008-05-25 09:43:03 +0000733- Created new UserDict class in collections module. This one inherits
734 from and complies with the MutableMapping ABC. Also, moved
735 UserString and UserList to the collections module. The
736 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000737
Guido van Rossumea6775b2008-02-21 20:16:31 +0000738- Removed UserDict.DictMixin. Replaced all its uses with
739 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000740
Guido van Rossume239b002008-01-06 00:44:20 +0000741- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000742
Guido van Rossume239b002008-01-06 00:44:20 +0000743- Issue #1585: IDLE uses non-existent xrange() function.
744
745- Issue #1578: Problems in win_getpass.
746
Georg Brandl52d168a2008-01-07 18:10:24 +0000747Build
748-----
749
Georg Brandl52b92cc2008-05-25 09:43:03 +0000750- Renamed --enable-unicode configure flag to --with-wide-unicode,
751 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000752
Guido van Rossume239b002008-01-06 00:44:20 +0000753C API
754-----
755
756- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
757 Py_TYPE and Py_REFCNT.
758
Georg Brandl52b92cc2008-05-25 09:43:03 +0000759- New API PyImport_ImportModuleNoBlock(), works like
760 PyImport_ImportModule() but won't block on the import lock
761 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000762
Christian Heimesbc873412007-12-08 22:11:32 +0000763
Fred Drake0e474a82007-10-11 18:01:43 +0000764What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000765===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000766
Guido van Rossum99533a92007-12-06 05:07:41 +0000767*Release date: 07-Dec-2007*
768
769(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000770
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000771Core and Builtins
772-----------------
773
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000774- str8 now has the same construction signature as bytes.
775
Georg Brandl52b92cc2008-05-25 09:43:03 +0000776- Comparisons between str and str8 now return False/True for ==/!=.
777 sqlite3 returns str8 when recreating on object from it's __conform__
778 value. The struct module returns str8 for all string-related
779 formats. This was true before this change, but becomes more
780 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000781
Georg Brandl52b92cc2008-05-25 09:43:03 +0000782- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
783 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000784
785- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
786
787- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000788 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000789 `PyUnicode_DecodeFSDefault(char*)` was added.
790
Georg Brandl52b92cc2008-05-25 09:43:03 +0000791- io.open() and _fileio.FileIO have grown a new argument closefd. A
792 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000793
Georg Brandl52b92cc2008-05-25 09:43:03 +0000794- Added a new option -b to issues warnings (-bb for errors) about
795 certain operations between bytes/buffer and str like str(b'') and
796 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000797
Georg Brandl52b92cc2008-05-25 09:43:03 +0000798- The standards streams sys.stdin, stdout and stderr may be None when
799 the when the C runtime library returns an invalid file descriptor
800 for the streams (fileno(stdin) < 0). For now this happens only for
801 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000802
Christian Heimesbce52be2007-11-17 19:08:41 +0000803- Added PCbuild9 directory for VS 2008.
804
Georg Brandl52b92cc2008-05-25 09:43:03 +0000805- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
806 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000807
Georg Brandl52b92cc2008-05-25 09:43:03 +0000808- Unbound methods are gone for good. ClassObject.method returns an
809 ordinary function object, instance.method still returns a bound
810 method object. The API of bound methods is cleaned up, too. The
811 im_class attribute is removed and im_func + im_self are renamed to
812 __func__ and __self__. The factory PyMethod_New takes only func and
813 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000814
Georg Brandl52b92cc2008-05-25 09:43:03 +0000815- intobject.h is no longer included by Python.h. The remains were
816 moved to longobject.h. It still exists to define several aliases
817 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000818
Christian Heimesa37d4c62007-12-04 23:02:19 +0000819- Removed sys.maxint, use sys.maxsize instead.
820
Fred Drake0e474a82007-10-11 18:01:43 +0000821Extension Modules
822-----------------
823
824- The `hotshot` profiler has been removed; use `cProfile` instead.
825
Brett Cannone9fd2312007-10-12 19:18:19 +0000826Library
827-------
828
Georg Brandl52b92cc2008-05-25 09:43:03 +0000829- When loading an external file using testfile(), the passed-in
830 encoding argument was being ignored if __loader__ is defined and
831 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000832
Georg Brandl52b92cc2008-05-25 09:43:03 +0000833- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
834 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000835
Christian Heimesc9543e42007-11-28 08:28:28 +0000836- Removed the 'new' module.
837
Georg Brandl52b92cc2008-05-25 09:43:03 +0000838- Removed all types from the 'types' module that are easily accessable
839 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000840
Georg Brandl52d168a2008-01-07 18:10:24 +0000841
Guido van Rossum4405cf32007-08-30 17:16:55 +0000842What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000843==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000844
Guido van Rossum4405cf32007-08-30 17:16:55 +0000845*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000846
847Core and Builtins
848-----------------
849
Martin v. Löwis47383402007-08-15 07:32:56 +0000850- PEP 3131: Support non-ASCII identifiers.
851
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000852- PEP 3120: Change default encoding to UTF-8.
853
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000854- PEP 3123: Use proper C inheritance for PyObject.
855
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000856- Removed the __oct__ and __hex__ special methods and added a bin()
857 builtin function.
858
Georg Brandl52b92cc2008-05-25 09:43:03 +0000859- PEP 3127: octal literals now start with "0o". Old-style octal
860 literals are invalid. There are binary literals with a prefix of
861 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000862
Guido van Rossume7ba4952007-06-06 23:52:48 +0000863- None, True, False are now keywords.
864
Guido van Rossum29478ef2007-05-29 00:39:44 +0000865- PEP 3119: isinstance() and issubclass() can be overridden.
866
Guido van Rossumebe3e162007-05-17 18:20:34 +0000867- Remove BaseException.message.
868
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000869- Remove tuple parameter unpacking (PEP 3113).
870
Georg Brandl52b92cc2008-05-25 09:43:03 +0000871- Remove the f_restricted attribute from frames. This naturally leads
872 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000873
Georg Brandl52b92cc2008-05-25 09:43:03 +0000874- PEP 3132 was accepted. That means that you can do ``a, *b =
875 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000876
Georg Brandl52b92cc2008-05-25 09:43:03 +0000877- range() now returns an iterator rather than a list. Floats are not
878 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000879
Nick Coghlan650f0d02007-04-15 12:05:43 +0000880- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000881 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000882
Guido van Rossume27dc722007-03-27 22:37:34 +0000883- By default, != returns the opposite of ==, unless the latter returns
884 NotImplemented.
885
Georg Brandl52b92cc2008-05-25 09:43:03 +0000886- Patch #1680961: sys.exitfunc has been removed and replaced with a
887 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000888
Georg Brandl801dd732007-03-18 20:18:31 +0000889- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000890 keyword arg in the class statement, which can now use the full
891 syntax of a parameter list. Also, the metaclass can implement a
892 __prepare__ function which will be called to create the dictionary
893 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000894
Georg Brandl428f0642007-03-18 18:35:15 +0000895- The long-deprecated argument "pend" of PyFloat_FromString() has been
896 removed.
897
Georg Brandle32b4222007-03-10 22:13:27 +0000898- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000899 its argument, if it exists. If not, it will work like before. This
900 allows customizing the output of dir() in the presence of a
901 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000902
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000903- Removed support for __members__ and __methods__.
904
Georg Brandle32b4222007-03-10 22:13:27 +0000905- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000906
Georg Brandle32b4222007-03-10 22:13:27 +0000907- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000908 functionality formerly known as raw_input(); the name raw_input() is
909 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000910
Georg Brandl52b92cc2008-05-25 09:43:03 +0000911- Classes listed in an 'except' clause must inherit from
912 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000913
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000914- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000915 and .keys(), .items(), .values() return dict views, which behave
916 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000917
Guido van Rossum8b545362007-02-09 23:52:14 +0000918- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000919 'softspace' attribute of files is now gone (since print() doesn't
920 use it). A side effect of this change is that you can get
921 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000922
923 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000924 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000925
926 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000927
Brett Cannon398db8b2007-01-29 23:44:37 +0000928- PEP 3102: keyword-only arguments.
929
Georg Brandl52b92cc2008-05-25 09:43:03 +0000930- Int/Long unification is complete. The 'long' built-in type and
931 literals with trailing 'L' or 'l' have been removed. Performance
932 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000933
934- 'except E, V' must now be spelled as 'except E as V' and deletes V
935 at the end of the except clause; V must be a simple name.
936
Neal Norwitzc1505362006-12-28 06:47:50 +0000937- Added function annotations per PEP 3107.
938
Georg Brandl52b92cc2008-05-25 09:43:03 +0000939- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000940
941 >>> def f(x):
942 ... def inc():
943 ... nonlocal x
944 ... x += 1
945 ... return x
946 ... return inc
947 ...
948 >>> inc = f(0)
949 >>> inc()
950 1
951 >>> inc()
952 2
953
Georg Brandl66a796e2006-12-19 20:50:34 +0000954- Moved intern() to sys.intern().
955
956- exec is now a function.
957
958- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000959
Neal Norwitz4886cc32006-08-21 17:06:07 +0000960- Classic classes are a thing of the past. All classes are new style.
961
962- Exceptions *must* derive from BaseException.
963
964- Integer division always returns a float. The -Q option is no more.
965 All the following are gone:
966 * PyNumber_Divide and PyNumber_InPlaceDivide
967 * __div__, __rdiv__, and __idiv__
968 * nb_divide, nb_inplace_divide
969 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
970 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
971 if we want to re-use __div__ and friends. If we do, it will make
972 it harder to write code for both 2.x and 3.x.)
973
974- 'as' and 'with' are keywords.
975
976- Absolute import is the default behavior for 'import foo' etc.
977
Georg Brandl52b92cc2008-05-25 09:43:03 +0000978- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000979
Georg Brandl52b92cc2008-05-25 09:43:03 +0000980- Removed these Python builtins: apply(), callable(), coerce(),
981 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000982
Georg Brandl52b92cc2008-05-25 09:43:03 +0000983- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000984
Georg Brandl52b92cc2008-05-25 09:43:03 +0000985- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000986
987- Remove C API support for restricted execution.
988
Guido van Rossumcf1be882007-08-30 22:07:17 +0000989- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000990 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000991 sequences of unequal length -- it now stops after the shortest one
992 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000993
Georg Brandl52b92cc2008-05-25 09:43:03 +0000994- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000995
996- Added class decorators per PEP 3129.
997
998
999Extension Modules
1000-----------------
1001
Georg Brandl52b92cc2008-05-25 09:43:03 +00001002- Removed the imageop module. Obsolete long with its unit tests
1003 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001004
Georg Brandl52b92cc2008-05-25 09:43:03 +00001005- Removed these attributes from the operator module: div, idiv,
1006 __div__, __idiv__, isCallable, sequenceIncludes.
1007
1008- Removed these attributes from the sys module: exc_clear(), exc_type,
1009 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001010
1011
1012Library
1013-------
1014
Georg Brandl52b92cc2008-05-25 09:43:03 +00001015- Removed the compiler package. Use of the _ast module and (an
1016 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001017
Georg Brandl52b92cc2008-05-25 09:43:03 +00001018- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
1019 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
1020 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001021
Georg Brandl52b92cc2008-05-25 09:43:03 +00001022- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001023
Georg Brandl52b92cc2008-05-25 09:43:03 +00001024- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1025 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1026 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001027
Georg Brandl52b92cc2008-05-25 09:43:03 +00001028- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001029
Georg Brandl52b92cc2008-05-25 09:43:03 +00001030- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001031 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001032
Georg Brandl52b92cc2008-05-25 09:43:03 +00001033- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001034
Georg Brandl52b92cc2008-05-25 09:43:03 +00001035- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001036
1037- Patch #1680961: atexit has been reimplemented in C.
1038
Walter Dörwald41980ca2007-08-16 21:55:45 +00001039- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1040
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001041Build
1042-----
1043
1044C API
1045-----
1046
Georg Brandl52b92cc2008-05-25 09:43:03 +00001047- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001048
Georg Brandl52b92cc2008-05-25 09:43:03 +00001049- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1050 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001051
Georg Brandl52b92cc2008-05-25 09:43:03 +00001052- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001053
Georg Brandl52b92cc2008-05-25 09:43:03 +00001054- Removed these macros: staticforward, statichere, PyArg_GetInt,
1055 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001056
Georg Brandl52b92cc2008-05-25 09:43:03 +00001057- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1058 intintobjargproc, getreadbufferproc, getwritebufferproc,
1059 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001060
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001061Tests
1062-----
1063
Brett Cannone7a30f72008-03-03 03:36:27 +00001064- Removed test.testall as test.regrtest replaces it.
1065
Brett Cannonced04e02005-02-13 22:53:22 +00001066Documentation
1067-------------
1068
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001069Mac
1070---
1071
Georg Brandl52b92cc2008-05-25 09:43:03 +00001072- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001073
Guido van Rossum845702c2007-08-30 18:44:53 +00001074Platforms
1075---------
1076
1077- Support for BeOS and AtheOS was removed (according to PEP 11).
1078
1079- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1080
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001081Tools/Demos
1082-----------
1083
Georg Brandl52b92cc2008-05-25 09:43:03 +00001084
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001085**(For information about older versions, consult the HISTORY file.)**