blob: 198e266aeb03087a2bc719f50c06297d1cc22f06 [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 Pitrou5651eaa2008-09-06 20:46:58 +000015- Issue #3705: fix crash when given a non-ascii value on the command line for
16 the "-c" and "-m" parameters. Now the behaviour is as expected under Linux,
17 although under Windows it fails at a later point.
18
Benjamin Peterson791dc2f2008-09-05 23:27:15 +000019- Issue #3279: Importing site at interpreter was failing silently because the
20 site module uses the open builtin which was not initialized at the time.
21
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +000022- Issue #3660: Corrected a reference leak in str.encode() when the encoder
23 does not return a bytes object.
24
25- Issue #3774: Added a few more checks in PyTokenizer_FindEncoding to handle
Amaury Forgeot d'Arc1b933ed2008-09-04 22:34:09 +000026 error conditions.
27
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +000028- Issue #3594: Fix Parser/tokenizer.c:fp_setreadl() to open the file being
Brett Cannon8a9583e2008-09-04 05:04:25 +000029 tokenized by either a file path or file pointer for the benefit of
30 PyTokenizer_FindEncoding().
31
Antoine Pitroufff95302008-09-03 18:58:51 +000032- Issue #3696: Error parsing arguments on OpenBSD <= 4.4 and Cygwin. On
33 these systems, the mbstowcs() function is slightly buggy and must be
34 replaced with strlen() for the purpose of counting of number of wide
35 characters needed to represent the multi-byte character string.
36
Antoine Pitrou658fad82008-09-03 18:34:34 +000037- Issue #3697: "Fatal Python error: Cannot recover from stack overflow"
38 could be easily encountered under Windows in debug mode when exercising
39 the recursion limit checking code, due to bogus handling of recursion
40 limit when USE_STACKCHEK was enabled.
41
Brett Cannon54bd41d2008-09-02 04:01:42 +000042- Issue 3639: The _warnings module could segfault the interpreter when
43 unexpected types were passed in as arguments.
44
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +000045- Issue #3712: The memoryview object had a reference leak and didn't support
46 cyclic garbage collection.
47
Antoine Pitrouf71995782008-08-29 18:37:05 +000048- Issue #3668: Fix a memory leak with the "s*" argument parser in
49 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
50 was correctly parsed but parsing of subsequent arguments failed.
51
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +000052- Issue #3611: An exception __context__ could be cleared in a complex pattern
53 involving a __del__ method re-raising an exception.
54
Antoine Pitrouec569b72008-08-26 22:40:48 +000055- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
56 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
57 mechanism. In the process, fix a bug where isinstance() and issubclass(),
58 when given a tuple of classes as second argument, were looking up
59 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
60 type object.
61
Antoine Pitroue2dffc02008-08-26 22:02:58 +000062- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
63
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +000064- Issue #3651: Fix various memory leaks when using the buffer
65 interface, or when the "s#" code of PyArg_ParseTuple is given a
66 bytes object.
67
Neal Norwitz6ae2eb22008-08-24 23:50:08 +000068- Issue #3657: Fix uninitialized memory read when pickling longs.
69 Found by valgrind.
70
Neal Norwitz3ce5d922008-08-24 07:08:55 +000071- Apply security patches from Apple.
72
Neal Norwitz2f99b242008-08-24 05:48:10 +000073- Fix crashes on memory allocation failure found with failmalloc.
74
75- Fix memory leaks found with valgrind and update suppressions file.
76
77- Fix compiler warnings in opt mode which would lead to invalid memory reads.
78
79- Fix problem using wrong name in decimal module reported by pychecker.
80
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000081- Issue #3650: Fixed a reference leak in bytes.split('x').
82
Benjamin Petersonc15a0732008-08-26 16:46:47 +000083- bytes(o) now tries to use o.__bytes__() before using fallbacks.
84
Gregory P. Smith207f2112008-09-07 06:29:10 +000085- Issue #1204: The configure script now tests for additional libraries
86 that may be required when linking against readline. This fixes issues
87 with x86_64 builds on some platforms (a few Linux flavors and OpenBSD).
88
Benjamin Petersonc15a0732008-08-26 16:46:47 +000089C API
90-----
91
92- PyObject_Bytes and PyBytes_FromObject were added.
93
Barry Warsaw8509df72008-08-21 03:02:47 +000094Library
95-------
96
Antoine Pitrou5fe291f2008-09-06 23:00:03 +000097- Issue #874900: fix behaviour of threading module after a fork.
98
Antoine Pitrou9e4fdf42008-09-05 23:43:02 +000099- Issue #3535: zipfile couldn't read some zip files larger than 2GB.
100
101- Issue #3776: Deprecate the bsddb package for removal in 3.0.
102
103- Issue #3762: platform.architecture() fails if python is lanched via
104 its symbolic link.
105
Antoine Pitroud79dc622008-09-05 00:03:33 +0000106- Issue #3660: fix a memory leak in the C accelerator of the pickle module.
107
Antoine Pitrou1d6a16b2008-09-04 21:32:09 +0000108- Issue #3160: the "bdist_wininst" distutils command didn't work.
109
Guilherme Polob212b752008-09-04 11:21:31 +0000110- Issue #1658: tkinter changes dict size during iteration in both
111 tkinter.BaseWidget and tkinter.scrolledtext.ScrolledText.
112
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000113- The bsddb module (and therefore the dbm.bsd module) has been removed.
Gregory P. Smith451e99b2008-09-04 04:46:48 +0000114 It is now maintained outside of the standard library at
115 http://www.jcea.es/programacion/pybsddb.htm.
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000116
Facundo Batistac469d4c2008-09-03 22:49:01 +0000117- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
118 to the urlparse one. Added a DeprecationWarning in the old module, it
119 will be deprecated in the future.
120
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +0000121- Issue #3719: platform.architecture() fails if there are spaces in the
122 path to the Python binary.
123
Brett Cannonec92e182008-09-02 02:46:59 +0000124- Issue 3602: As part of the merge of r66135, make the parameters on
125 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
126
Benjamin Petersonb3085c92008-09-01 23:09:31 +0000127- The deprecation warnings for the camelCase threading API names were removed.
128
Jesse Noller338f5782008-09-03 18:22:19 +0000129- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
130 SEM_VALUE_MAX.
131
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000132Extension Modules
133-----------------
134
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +0000135- Issue #2975: When compiling several extension modules with Visual Studio 2008
136 from the same python interpreter, some environment variables would grow
137 without limit.
138
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000139- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
140 exploitation of poor argument checking.
141
Jesus Cea6ba33292008-08-31 14:12:11 +0000142- bsddb code updated to version 4.7.3pre2. This code is the same than
143 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
144 The Python code is automatically translated using "2to3". Please, do not
145 update this code in Python 3.0 by hand. Update the 2.6 one and then
146 do "2to3".
147
Benjamin Peterson791dc2f2008-09-05 23:27:15 +0000148- The _bytesio and _stringio modules are now compiled into the python binary.
149
Gregory P. Smith693fc462008-09-06 20:13:06 +0000150- Issue #3492 and #3790: Fixed the zlib module and zipimport module uses of
151 mutable bytearray objects where they should have been using immutable bytes.
152
Gregory P. Smith0a608fd2008-09-06 21:34:51 +0000153- Issue #3797: Fixed the dbm, marshal, mmap, ossaudiodev, & winreg modules to
154 return bytes objects instead of bytearray objects.
155
Gregory P. Smith693fc462008-09-06 20:13:06 +0000156
Neal Norwitz8f2f22a2008-08-24 20:59:23 +0000157Tools/Demos
158-----------
159
160- Fix Misc/gdbinit so it works.
161
Barry Warsaw8509df72008-08-21 03:02:47 +0000162
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000163What's new in Python 3.0b3?
164===========================
165
Barry Warsaw57c10582008-08-21 02:39:51 +0000166*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000167
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000168Core and Builtins
169-----------------
170
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000171- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
172 arguments.
173
Antoine Pitrou616d2852008-08-19 22:09:34 +0000174- Issue #2394: implement more of the memoryview API, with the caveat that
175 only one-dimensional contiguous buffers are supported and exercised right
176 now. Slicing, slice assignment and comparison (equality and inequality)
177 have been added. Also, the tolist() method has been implemented, but only
178 for byte buffers. Endly, the API has been updated to return bytes objects
179 wherever it used to return bytearrays.
180
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000181- Issue #3560: clean up the new C PyMemoryView API so that naming is
182 internally consistent; add macros PyMemoryView_GET_BASE() and
183 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
184 without relying on a particular implementation; remove the ill-named
185 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
186
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000187- ctypes function pointers that are COM methods have a boolean True
188 value again.
189
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000190- Issue #1819: function calls with several named parameters are now on
191 average 35% faster (as measured by pybench).
192
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000193- The undocumented C APIs PyUnicode_AsString() and
194 PyUnicode_AsStringAndSize() were made private to the interpreter, in
195 order to be able to refine their interfaces for Python 3.1.
196
197 If you need to access the UTF-8 representation of a Unicode object
198 as bytes string, please use PyUnicode_AsUTF8String() instead.
199
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000200- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
201 to Python 3.0's stricter semantics which allow to avoid successive
202 reallocations of the result string (this also affects str.join()).
203
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000204
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000205Library
206-------
207
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000208- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
209 a build problem on MacOS with CJK locales. It adds four temporary
210 mappings to existing legacy codecs that are virtually compatible
211 with Mac encodings. They will be replaced by codecs correctly
212 implemented in 3.1.
213
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000214- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
215 "global name 'header' is not defined".
216
Antoine Pitroufd036452008-08-19 17:56:33 +0000217- Issue #2834: update the regular expression library to match the unicode
218 standards of py3k. In other words, mixing bytes and unicode strings
219 (be it as pattern, search string or replacement string) raises a TypeError.
220 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
221 and can be disabled by specifying a new re.ASCII flag; as for bytes
222 patterns, ASCII matching is the only option and trying to specify re.UNICODE
223 for such patterns raises a ValueError.
224
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000225- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
226 Code contributed by Matt Giuca. quote() now encodes the input
227 before quoting, unquote() decodes after unquoting. There are
228 new arguments to change the encoding and errors settings.
229 There are also new APIs to skip the encode/decode steps.
230 [un]quote_plus() are also affected.
231
Nick Coghlan36f49522008-08-18 12:31:52 +0000232- Issue #2235: numbers.Number now blocks inheritance of the default id()
233 based hash because that hash mechanism is not correct for numeric types.
234 All concrete numeric types that inherit from Number (rather than just
235 registering with it) must explicitly provide a hash implementation in
236 order for their instances to be hashable.
237
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000238- Issue #2676: in the email package, content-type parsing was hanging on
239 pathological input because of quadratic or exponential behaviour of a
240 regular expression.
241
Antoine Pitrou87695762008-08-14 22:44:29 +0000242- Issue #3476: binary buffered reading through the new "io" library is now
243 thread-safe.
244
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000245- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
246 menu entries were not deleted.
247
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000248- Remove the TarFileCompat class from tarfile.py.
249
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000250- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
251 accepts the same parameters. It just checks that its first argument is an
252 integer.
253
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000254- Issue #3394: zipfile.writestr sets external attributes when passed a
255 file name rather than a ZipInfo instance, so files are extracted with
256 mode 0600 rather than 000 under Unix.
257
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000258- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
259 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000260
Martin v. Löwis371bb502008-08-16 13:02:57 +0000261Extension Modules
262-----------------
263
264- Bug #3542: Support Unicode strings in _msi module.
265
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000266What's new in Python 3.0b2?
267===========================
268
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000269*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000270
271Core and Builtins
272-----------------
273
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000274- Issue #3008: the float type has a new instance method 'float.hex'
275 and a new class method 'float.fromhex' to convert floating-point
276 numbers to and from hexadecimal strings, respectively.
277
Eric Smithd68af8f2008-07-16 00:15:35 +0000278- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
279 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
280
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000281- Issue #3280: like chr(), the "%c" format now accepts unicode code points
282 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
283 "narrow Unicode" builds, the result is a string of 2 code units, forming a
284 UTF-16 surrogate pair.
285
Georg Brandld52429f2008-07-04 15:55:02 +0000286- Issue #3282: str.isprintable() should return False for undefined
287 Unicode characters.
288
Martin v. Löwis029656f2008-06-30 04:06:08 +0000289- Issue #3236: Return small longs from PyLong_FromString.
290
Benjamin Petersone6528212008-07-15 15:32:09 +0000291- Exception tracebacks now support exception chaining.
292
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000293Library
294-------
295
Brett Cannonc2542e92008-07-25 18:19:20 +0000296- Removed the sunaudio module. Use sunau instead.
297
Thomas Heller47bc8092008-08-19 06:38:12 +0000298- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
299 api functions without holding the GIL, which could lead to a fatal
300 error when they failed.
301
302- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
303
Georg Brandl30704ea02008-07-23 15:07:12 +0000304- Removed "ast" function aliases from the parser module.
305
Thomas Heller15383a02008-07-15 19:46:52 +0000306- Issue #3313: Fixed a crash when a failed dlopen() call does not set
307 a valid dlerror() message.
308
Thomas Heller0261e1e2008-07-15 17:25:07 +0000309- Issue #3258: Fixed a crash when a ctypes POINTER type to an
310 incomplete structure was created.
311
Georg Brandl1abcbf82008-07-01 19:28:43 +0000312- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
313 argument now must be a bytes object in any case.
314
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000315- Issue #3145: help("modules whatever") failed when trying to load the source
316 code of every single module of the standard library, including invalid files
317 used in the test suite.
318
Georg Brandlbded4d32008-07-17 18:15:35 +0000319- The gettext library now consistently uses Unicode strings for message ids
320 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000321
Benjamin Petersone6528212008-07-15 15:32:09 +0000322- The traceback module has been expanded to handle chained exceptions.
323
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000324C API
325-----
326
327- Issue #3247: the function Py_FindMethod was removed. Modern types should
328 use the tp_methods slot instead.
329
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000330Tools/Demos
331-----------
332
Georg Brandl336341f2008-07-01 20:21:28 +0000333- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000334
Georg Brandl336341f2008-07-01 20:21:28 +0000335- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000336
337
Brett Cannon0d71ee72008-05-08 18:13:40 +0000338What's new in Python 3.0b1?
339===========================
340
Barry Warsawc1e689e2008-06-19 00:35:43 +0000341*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000342
343Core and Builtins
344-----------------
345
Brett Cannondb734912008-06-27 00:52:15 +0000346- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
347 argument being anything other than a dict or None. Also fixed a bug in error
348 handling when 'message' and 'category' were both set to None, triggering a
349 bus error.
350
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000351- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
352 holds the last (strong) reference to its referent.
353
Georg Brandl559e5d72008-06-11 18:37:52 +0000354- Issue #2630: implement PEP 3138. repr() now returns printable
355 Unicode characters unescaped, to get an ASCII-only representation
356 of an object use ascii().
357
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000358- Issue #1342: On windows, Python could not start when installed in a
359 directory with non-ascii characters.
360
Martin v. Löwis1a214512008-06-11 05:26:20 +0000361- Implement PEP 3121: new module initialization and finalization API.
362
Georg Brandle1b5ac62008-06-04 13:06:58 +0000363- Removed the already-defunct ``-t`` option.
364
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000365- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
366 unmarshalling many code objects, which happens when importing a
367 large .pyc file (~1000 functions).
368
Georg Brandl52b92cc2008-05-25 09:43:03 +0000369- Issue #2963: fix merging oversight that disabled method cache for
370 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000371
Georg Brandlc9b09532008-05-25 09:24:38 +0000372- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
373
Georg Brandl52b92cc2008-05-25 09:43:03 +0000374- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000375
Georg Brandl52b92cc2008-05-25 09:43:03 +0000376- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
377 code now allows any unicode string and returns a utf-8 encoded
378 buffer, just like the "s#" code already does. The "z" code was
379 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000380
Georg Brandl52b92cc2008-05-25 09:43:03 +0000381- Issue #2863: generators now have a ``gen.__name__`` attribute that
382 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
383 ``func.func_code.co_name``. The repr() of a generator now also
384 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000385
386- Issue #2831: enumerate() now has a ``start`` argument.
387
Georg Brandl52b92cc2008-05-25 09:43:03 +0000388- Issue #2801: fix bug in the float.is_integer method where a
389 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000390
Georg Brandl52b92cc2008-05-25 09:43:03 +0000391- The ``--with-toolbox-glue`` option (and the associated
392 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000393
Georg Brandl52b92cc2008-05-25 09:43:03 +0000394- Issue #2196: hasattr() now lets exceptions which do not inherit
395 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
396 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000397
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000398- #3021 Exception reraising sematics have been significantly improved. However,
399 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
400 code anymore.
401
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000402- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
403 removed.
404
Brett Cannon0d71ee72008-05-08 18:13:40 +0000405Extension Modules
406-----------------
407
Georg Brandl38feaf02008-05-25 07:45:51 +0000408- Renamed ``_winreg`` module to ``winreg``.
409
Georg Brandl52b92cc2008-05-25 09:43:03 +0000410- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
411 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000412
413- Support for Windows 9x has been removed from the winsound module.
414
Georg Brandl52b92cc2008-05-25 09:43:03 +0000415- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000416
Brett Cannon0d71ee72008-05-08 18:13:40 +0000417Library
418-------
419
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000420- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
421 symtable.Symbol have been removed.
422
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000423- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
424
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000425- a new ``urllib`` package was created. It consists of code from
426 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
427 modules have all been removed. The new package has five submodules:
428 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
429 ``urllib.error``, and ``urllib.robotparser``. The
430 ``urllib.request.urlopen()`` function uses the url opener from
431 ``urllib2``. (Note that the unittests have not been renamed for the
432 beta, but they will be renamed in the future.)
433
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000434- rfc822 has been removed in favor of the email package.
435
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000436- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000437
Barry Warsawf5019422008-06-12 02:42:00 +0000438- Patch #2849: Remove use of rfc822 module from standard library.
439
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000440- Added C optimized implementation of io.StringIO.
441
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000442- The ``pickle`` module is now automatically use an optimized C
443 implementation of Pickler and Unpickler when available. The
444 ``cPickle`` module is no longer needed.
445
Georg Brandl877b10a2008-06-01 21:25:55 +0000446- Removed the ``htmllib`` and ``sgmllib`` modules.
447
Georg Brandl61013952008-05-28 15:56:30 +0000448- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
449 been removed from ``http.cookies``.
450
Brett Cannona23810f2008-05-26 19:04:21 +0000451- The ``commands`` module has been removed. Its getoutput() and
452 getstatusoutput() functions have been moved to the ``subprocess`` module.
453
Georg Brandl3d5c4252008-05-26 18:03:26 +0000454- The ``http`` package was created; it contains the old ``httplib``
455 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
456 as ``http.cookiejar``, and the content of the three ``HTTPServer``
457 modules as ``http.server``.
458
Georg Brandl38eceaa2008-05-26 11:14:17 +0000459- The ``xmlrpc`` package was created; it contains the old
460 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
461 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000462 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000463
464- The ``dbm`` package was created, containing the old modules
465 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
466 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
467 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
468 as submodules.
469
Georg Brandl52b92cc2008-05-25 09:43:03 +0000470- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000471
Georg Brandl52b92cc2008-05-25 09:43:03 +0000472- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000473
Georg Brandl52b92cc2008-05-25 09:43:03 +0000474- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000475
Georg Brandl52b92cc2008-05-25 09:43:03 +0000476- Issue #2250: Exceptions raised during evaluation of names in
477 rlcompleter's ``Completer.complete()`` method are now caught and
478 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000479
Georg Brandl52b92cc2008-05-25 09:43:03 +0000480- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
481 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000482
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000483- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
484 large to fit in a C long. ldexp(x, n) now returns a zero (with
485 suitable sign) if n is large and negative; previously, it raised
486 OverflowError.
487
Georg Brandl52b92cc2008-05-25 09:43:03 +0000488- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000489
Georg Brandl52b92cc2008-05-25 09:43:03 +0000490- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000491
Georg Brandl52b92cc2008-05-25 09:43:03 +0000492- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000493
Georg Brandl52b92cc2008-05-25 09:43:03 +0000494- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000495
Georg Brandl52b92cc2008-05-25 09:43:03 +0000496- Fixed the ``__all__`` setting on ``collections`` to include
497 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000498
Brett Cannoncf3520c2008-05-11 22:47:58 +0000499- The sre module has been removed.
500
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000501- The Queue module has been renamed to queue.
502
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000503- The copy_reg module has been renamed to copyreg.
504
Brett Cannond8b61ee2008-05-11 03:00:26 +0000505- The mhlib module has been removed.
506
Brett Cannonbd474422008-05-10 22:42:14 +0000507- The ihooks module has been removed.
508
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000509- The fpformat module has been removed.
510
Brett Cannonf4fd9932008-05-10 21:11:46 +0000511- The dircache module has been removed.
512
Brett Cannond175b4c2008-05-10 03:19:54 +0000513- The Canvas module has been removed.
514
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000515- The Decimal module gained the magic methods __round__, __ceil__,
516 __floor__ and __trunc__, to give support for round, math.ceil,
517 math.floor and math.trunc.
518
Brett Cannon900ee3a2008-05-08 20:31:11 +0000519- The user module has been removed.
520
Brett Cannon34afe872008-05-08 20:31:44 +0000521- The mutex module has been removed.
522
Brett Cannon0d71ee72008-05-08 18:13:40 +0000523- The imputil module has been removed.
524
Georg Brandl52b92cc2008-05-25 09:43:03 +0000525- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000526
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000527- pdb gained the "until" command.
528
Georg Brandl52b92cc2008-05-25 09:43:03 +0000529- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000530
Georg Brandl32de7af2008-08-18 23:07:41 +0000531- The threading module API was renamed to be PEP 8 compliant. The
532 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000533
Georg Brandl294d5a92008-06-01 19:25:32 +0000534Tools/Demos
535-----------
536
537- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000538
Brett Cannon0d71ee72008-05-08 18:13:40 +0000539Build
540-----
541
542
Barry Warsaw66079cd2008-04-04 01:36:36 +0000543What's New in Python 3.0a5?
544===========================
545
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000546*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000547
548Core and Builtins
549-----------------
550
Georg Brandl52b92cc2008-05-25 09:43:03 +0000551- Fixed misbehaviour of PyLong_FromSsize_t on systems where
552 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000553
Georg Brandl52b92cc2008-05-25 09:43:03 +0000554- Issue #2221: Corrected a SystemError "error return without exception
555 set", when the code executed by exec() raises an exception, and
556 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000557
Georg Brandl52b92cc2008-05-25 09:43:03 +0000558- Bug #2565: The repr() of type objects now calls them 'class', not
559 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000560
Martin v. Löwis790465f2008-04-05 20:41:37 +0000561- The command line processing was converted to pass Unicode strings
562 through as unmodified as possible; as a consequence, the C API
563 related to command line arguments was changed to use wchar_t.
564
Georg Brandl52b92cc2008-05-25 09:43:03 +0000565- All backslashes in raw strings are interpreted literally. This
566 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000567
Barry Warsaw66079cd2008-04-04 01:36:36 +0000568Extension Modules
569-----------------
570
571Library
572-------
573
Georg Brandl52b92cc2008-05-25 09:43:03 +0000574- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000575
Thomas Hellere106dc32008-04-24 18:39:36 +0000576- Issue #2682: ctypes callback functions now longer contain a cyclic
577 reference to themselves.
578
Georg Brandl52b92cc2008-05-25 09:43:03 +0000579- Issue #2058: Remove the buf attribute and add __slots__ to the
580 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000581
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000582- Bug #2606: Avoid calling .sort() on a dict_keys object.
583
Thomas Hellerbff533b2008-04-04 19:53:14 +0000584- The bundled libffi copy is now in sync with the recently released
585 libffi3.0.5 version, apart from some small changes to
586 Modules/_ctypes/libffi/configure.ac.
587
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000588Build
589-----
590
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000591- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
592
Guido van Rossumdc21db32008-04-07 18:37:41 +0000593- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000594 accidentally overwriting a Python 2.x installation. Use "make
595 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000596
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000597- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
598 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000599
Georg Brandl52b92cc2008-05-25 09:43:03 +0000600
Barry Warsawa9d499d2008-03-01 18:38:07 +0000601What's New in Python 3.0a4?
602===========================
603
Barry Warsawbb5cd082008-04-02 23:33:27 +0000604*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000605
Martin v. Löwis25931462008-03-17 20:43:42 +0000606Core and Builtins
607-----------------
608
609- Bug #2301: Don't try decoding the source code into the original
610 encoding for syntax errors.
611
Martin v. Löwis92fab752008-03-08 10:40:41 +0000612Extension Modules
613-----------------
614
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000615- The dl module was removed, use the ctypes module instead.
616
Martin v. Löwis92fab752008-03-08 10:40:41 +0000617- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000618
Martin v. Löwis071ef772008-03-08 11:24:24 +0000619Library
620-------
621
Georg Brandl52b92cc2008-05-25 09:43:03 +0000622- The class distutils.commands.build_py.build_py_2to3 can be used as a
623 build_py replacement to automatically run 2to3 on modules that are
624 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000625
Guido van Rossumf4169812008-03-17 22:56:06 +0000626- A new pickle protocol (protocol 3) is added with explicit support
627 for bytes. This is the default protocol. It intentionally cannot
628 be unpickled by Python 2.x.
629
630- When a pickle written by Python 2.x contains an (8-bit) str
631 instance, this is now decoded to a (Unicode) str instance. The
632 encoding used to do this defaults to ASCII, but can be overridden
633 via two new keyword arguments to the Unpickler class. Previously
634 this would create bytes instances, which is usually wrong: str
635 instances are often used to pickle attribute names etc., and text is
636 more common than binary data anyway.
637
Martin v. Löwis071ef772008-03-08 11:24:24 +0000638- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000639 system doesn't support CODESET and LANG isn't set or doesn't allow
640 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000641
Georg Brandl52b92cc2008-05-25 09:43:03 +0000642- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
643 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000644
Georg Brandl52b92cc2008-05-25 09:43:03 +0000645- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
646 has been renamed tokenize and now works with bytes rather than
647 strings. A new detect_encoding function has been added for
648 determining source file encoding according to PEP-0263. Token
649 sequences returned by tokenize always start with an ENCODING token
650 which specifies the encoding used to decode the file. This token is
651 used to encode the output of untokenize back to bytes.
652
Barry Warsawa9d499d2008-03-01 18:38:07 +0000653
Christian Heimesbc873412007-12-08 22:11:32 +0000654What's New in Python 3.0a3?
655===========================
656
Barry Warsaw659fc422008-03-01 17:45:23 +0000657*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000658
659Core and Builtins
660-----------------
661
Georg Brandl52b92cc2008-05-25 09:43:03 +0000662- Issue #2282: io.TextIOWrapper was not overriding seekable() from
663 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000664
Georg Brandl52b92cc2008-05-25 09:43:03 +0000665- Issue #2115: Important speedup in setting __slot__ attributes. Also
666 prevent a possible crash: an Abstract Base Class would try to access
667 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000668
Georg Brandl52b92cc2008-05-25 09:43:03 +0000669- Fixed repr() and str() of complex numbers with infinity or nan as
670 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000671
Georg Brandl52b92cc2008-05-25 09:43:03 +0000672- Clear all free list during a gc.collect() of the highest generation
673 in order to allow pymalloc to free more arenas. Python may give back
674 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000675
Georg Brandl52b92cc2008-05-25 09:43:03 +0000676- Issue #2045: Fix an infinite recursion triggered when printing a
677 subclass of collections.defaultdict, if its default_factory is set
678 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000679
680- Fixed a minor memory leak in dictobject.c. The content of the free
681 list was not freed on interpreter shutdown.
682
Georg Brandl52b92cc2008-05-25 09:43:03 +0000683- Limit free list of method and builtin function objects to 256
684 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000685
Georg Brandl52b92cc2008-05-25 09:43:03 +0000686- Patch #1953: Added ``sys._compact_freelists()`` and the C API
687 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000688 to compact the internal free lists of pre-allocted ints and floats.
689
690- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000691 Python expected the return type int but the fork familie returns
692 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000693
Georg Brandl52b92cc2008-05-25 09:43:03 +0000694- Issue #1678380: Fix a bug that identifies 0j and -0j when they
695 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000696
Georg Brandl52b92cc2008-05-25 09:43:03 +0000697- Issue #2025: Added tuple.count() and tuple.index() methods to comply
698 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000699
Georg Brandl52b92cc2008-05-25 09:43:03 +0000700- Fixed multiple reinitialization of the Python interpreter. The small
701 int list in longobject.c has caused a seg fault during the third
702 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000703
Georg Brandl52b92cc2008-05-25 09:43:03 +0000704- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000705
Georg Brandl52b92cc2008-05-25 09:43:03 +0000706- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000707
Georg Brandl52b92cc2008-05-25 09:43:03 +0000708- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000709
Georg Brandl52b92cc2008-05-25 09:43:03 +0000710- map() no longer accepts None for the first argument. Use zip()
711 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000712
Facundo Batista2336bdd2008-01-19 19:12:01 +0000713- Issue #1769: Now int("- 1") is not allowed any more.
714
Georg Brandl52b92cc2008-05-25 09:43:03 +0000715- Object/longobject.c: long(float('nan')) raises an OverflowError
716 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000717
Georg Brandl52b92cc2008-05-25 09:43:03 +0000718- Issue #1762972: __file__ points to the source file instead of the
719 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000720
Guido van Rossumab078dd2008-01-06 00:09:11 +0000721- Issue #1393: object_richcompare() returns NotImplemented instead of
722 False if the objects aren't equal, to give the other side a chance.
723
Guido van Rossume239b002008-01-06 00:44:20 +0000724- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000725
Georg Brandl52b92cc2008-05-25 09:43:03 +0000726- Improve some exception messages when Windows fails to load an
727 extension module. Now we get for example '%1 is not a valid Win32
728 application' instead of 'error code 193'. Also use Unicode strings
729 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000730
Georg Brandl52b92cc2008-05-25 09:43:03 +0000731- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
732 Python C API has gained a new type *PyInstanceMethod_Type* and the
733 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
734 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000735
Georg Brandl52b92cc2008-05-25 09:43:03 +0000736- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
737 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
738 are now enough to print the corresponding list of objects considered
739 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000740
Georg Brandl52b92cc2008-05-25 09:43:03 +0000741- Issue #1573: Improper use of the keyword-only syntax makes the
742 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000743
Georg Brandl52b92cc2008-05-25 09:43:03 +0000744- Issue #1564: The set implementation should special-case PyUnicode
745 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000746
Guido van Rossumea6775b2008-02-21 20:16:31 +0000747- Patch #1031213: Decode source line in SyntaxErrors back to its
748 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000749
Christian Heimes09aaa882008-02-23 15:01:06 +0000750- inspect.getsource() includes the decorators again.
751
Guido van Rossumea6775b2008-02-21 20:16:31 +0000752- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
753 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000754
Georg Brandl52b92cc2008-05-25 09:43:03 +0000755- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
756 the first chunk fed to the decoder started with a BOM, but was
757 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000758
Christian Heimesbc873412007-12-08 22:11:32 +0000759Extension Modules
760-----------------
761
Georg Brandl52b92cc2008-05-25 09:43:03 +0000762- Code for itertools ifilter(), imap(), and izip() moved to bultins
763 and renamed to filter(), map(), and zip(). Also, renamed
764 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000765
Georg Brandl52b92cc2008-05-25 09:43:03 +0000766- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000767
Georg Brandl52b92cc2008-05-25 09:43:03 +0000768- Bug #2111: mmap segfaults when trying to write a block opened with
769 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000770
Georg Brandl52b92cc2008-05-25 09:43:03 +0000771- Issue #2063: correct order of utime and stime in os.times() result
772 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000773
Christian Heimesbc873412007-12-08 22:11:32 +0000774Library
775-------
776
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000777- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000778
Georg Brandl52b92cc2008-05-25 09:43:03 +0000779- Created new UserDict class in collections module. This one inherits
780 from and complies with the MutableMapping ABC. Also, moved
781 UserString and UserList to the collections module. The
782 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000783
Guido van Rossumea6775b2008-02-21 20:16:31 +0000784- Removed UserDict.DictMixin. Replaced all its uses with
785 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000786
Guido van Rossume239b002008-01-06 00:44:20 +0000787- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000788
Guido van Rossume239b002008-01-06 00:44:20 +0000789- Issue #1585: IDLE uses non-existent xrange() function.
790
791- Issue #1578: Problems in win_getpass.
792
Georg Brandl52d168a2008-01-07 18:10:24 +0000793Build
794-----
795
Georg Brandl52b92cc2008-05-25 09:43:03 +0000796- Renamed --enable-unicode configure flag to --with-wide-unicode,
797 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000798
Guido van Rossume239b002008-01-06 00:44:20 +0000799C API
800-----
801
802- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
803 Py_TYPE and Py_REFCNT.
804
Georg Brandl52b92cc2008-05-25 09:43:03 +0000805- New API PyImport_ImportModuleNoBlock(), works like
806 PyImport_ImportModule() but won't block on the import lock
807 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000808
Christian Heimesbc873412007-12-08 22:11:32 +0000809
Fred Drake0e474a82007-10-11 18:01:43 +0000810What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000811===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000812
Guido van Rossum99533a92007-12-06 05:07:41 +0000813*Release date: 07-Dec-2007*
814
815(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000816
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000817Core and Builtins
818-----------------
819
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000820- str8 now has the same construction signature as bytes.
821
Georg Brandl52b92cc2008-05-25 09:43:03 +0000822- Comparisons between str and str8 now return False/True for ==/!=.
823 sqlite3 returns str8 when recreating on object from it's __conform__
824 value. The struct module returns str8 for all string-related
825 formats. This was true before this change, but becomes more
826 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000827
Georg Brandl52b92cc2008-05-25 09:43:03 +0000828- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
829 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000830
831- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
832
833- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000834 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000835 `PyUnicode_DecodeFSDefault(char*)` was added.
836
Georg Brandl52b92cc2008-05-25 09:43:03 +0000837- io.open() and _fileio.FileIO have grown a new argument closefd. A
838 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000839
Georg Brandl52b92cc2008-05-25 09:43:03 +0000840- Added a new option -b to issues warnings (-bb for errors) about
841 certain operations between bytes/buffer and str like str(b'') and
842 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000843
Georg Brandl52b92cc2008-05-25 09:43:03 +0000844- The standards streams sys.stdin, stdout and stderr may be None when
845 the when the C runtime library returns an invalid file descriptor
846 for the streams (fileno(stdin) < 0). For now this happens only for
847 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000848
Christian Heimesbce52be2007-11-17 19:08:41 +0000849- Added PCbuild9 directory for VS 2008.
850
Georg Brandl52b92cc2008-05-25 09:43:03 +0000851- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
852 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000853
Georg Brandl52b92cc2008-05-25 09:43:03 +0000854- Unbound methods are gone for good. ClassObject.method returns an
855 ordinary function object, instance.method still returns a bound
856 method object. The API of bound methods is cleaned up, too. The
857 im_class attribute is removed and im_func + im_self are renamed to
858 __func__ and __self__. The factory PyMethod_New takes only func and
859 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000860
Georg Brandl52b92cc2008-05-25 09:43:03 +0000861- intobject.h is no longer included by Python.h. The remains were
862 moved to longobject.h. It still exists to define several aliases
863 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000864
Christian Heimesa37d4c62007-12-04 23:02:19 +0000865- Removed sys.maxint, use sys.maxsize instead.
866
Fred Drake0e474a82007-10-11 18:01:43 +0000867Extension Modules
868-----------------
869
870- The `hotshot` profiler has been removed; use `cProfile` instead.
871
Brett Cannone9fd2312007-10-12 19:18:19 +0000872Library
873-------
874
Georg Brandl52b92cc2008-05-25 09:43:03 +0000875- When loading an external file using testfile(), the passed-in
876 encoding argument was being ignored if __loader__ is defined and
877 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000878
Georg Brandl52b92cc2008-05-25 09:43:03 +0000879- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
880 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000881
Christian Heimesc9543e42007-11-28 08:28:28 +0000882- Removed the 'new' module.
883
Georg Brandl52b92cc2008-05-25 09:43:03 +0000884- Removed all types from the 'types' module that are easily accessable
885 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000886
Georg Brandl52d168a2008-01-07 18:10:24 +0000887
Guido van Rossum4405cf32007-08-30 17:16:55 +0000888What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000889==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000890
Guido van Rossum4405cf32007-08-30 17:16:55 +0000891*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000892
893Core and Builtins
894-----------------
895
Martin v. Löwis47383402007-08-15 07:32:56 +0000896- PEP 3131: Support non-ASCII identifiers.
897
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000898- PEP 3120: Change default encoding to UTF-8.
899
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000900- PEP 3123: Use proper C inheritance for PyObject.
901
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000902- Removed the __oct__ and __hex__ special methods and added a bin()
903 builtin function.
904
Georg Brandl52b92cc2008-05-25 09:43:03 +0000905- PEP 3127: octal literals now start with "0o". Old-style octal
906 literals are invalid. There are binary literals with a prefix of
907 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000908
Guido van Rossume7ba4952007-06-06 23:52:48 +0000909- None, True, False are now keywords.
910
Guido van Rossum29478ef2007-05-29 00:39:44 +0000911- PEP 3119: isinstance() and issubclass() can be overridden.
912
Guido van Rossumebe3e162007-05-17 18:20:34 +0000913- Remove BaseException.message.
914
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000915- Remove tuple parameter unpacking (PEP 3113).
916
Georg Brandl52b92cc2008-05-25 09:43:03 +0000917- Remove the f_restricted attribute from frames. This naturally leads
918 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000919
Georg Brandl52b92cc2008-05-25 09:43:03 +0000920- PEP 3132 was accepted. That means that you can do ``a, *b =
921 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000922
Georg Brandl52b92cc2008-05-25 09:43:03 +0000923- range() now returns an iterator rather than a list. Floats are not
924 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000925
Nick Coghlan650f0d02007-04-15 12:05:43 +0000926- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000927 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000928
Guido van Rossume27dc722007-03-27 22:37:34 +0000929- By default, != returns the opposite of ==, unless the latter returns
930 NotImplemented.
931
Georg Brandl52b92cc2008-05-25 09:43:03 +0000932- Patch #1680961: sys.exitfunc has been removed and replaced with a
933 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000934
Georg Brandl801dd732007-03-18 20:18:31 +0000935- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000936 keyword arg in the class statement, which can now use the full
937 syntax of a parameter list. Also, the metaclass can implement a
938 __prepare__ function which will be called to create the dictionary
939 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000940
Georg Brandl428f0642007-03-18 18:35:15 +0000941- The long-deprecated argument "pend" of PyFloat_FromString() has been
942 removed.
943
Georg Brandle32b4222007-03-10 22:13:27 +0000944- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000945 its argument, if it exists. If not, it will work like before. This
946 allows customizing the output of dir() in the presence of a
947 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000948
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000949- Removed support for __members__ and __methods__.
950
Georg Brandle32b4222007-03-10 22:13:27 +0000951- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000952
Georg Brandle32b4222007-03-10 22:13:27 +0000953- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000954 functionality formerly known as raw_input(); the name raw_input() is
955 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000956
Georg Brandl52b92cc2008-05-25 09:43:03 +0000957- Classes listed in an 'except' clause must inherit from
958 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000959
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000960- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000961 and .keys(), .items(), .values() return dict views, which behave
962 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000963
Guido van Rossum8b545362007-02-09 23:52:14 +0000964- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000965 'softspace' attribute of files is now gone (since print() doesn't
966 use it). A side effect of this change is that you can get
967 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000968
969 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000970 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000971
972 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000973
Brett Cannon398db8b2007-01-29 23:44:37 +0000974- PEP 3102: keyword-only arguments.
975
Georg Brandl52b92cc2008-05-25 09:43:03 +0000976- Int/Long unification is complete. The 'long' built-in type and
977 literals with trailing 'L' or 'l' have been removed. Performance
978 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000979
980- 'except E, V' must now be spelled as 'except E as V' and deletes V
981 at the end of the except clause; V must be a simple name.
982
Neal Norwitzc1505362006-12-28 06:47:50 +0000983- Added function annotations per PEP 3107.
984
Georg Brandl52b92cc2008-05-25 09:43:03 +0000985- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000986
987 >>> def f(x):
988 ... def inc():
989 ... nonlocal x
990 ... x += 1
991 ... return x
992 ... return inc
993 ...
994 >>> inc = f(0)
995 >>> inc()
996 1
997 >>> inc()
998 2
999
Georg Brandl66a796e2006-12-19 20:50:34 +00001000- Moved intern() to sys.intern().
1001
1002- exec is now a function.
1003
1004- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +00001005
Neal Norwitz4886cc32006-08-21 17:06:07 +00001006- Classic classes are a thing of the past. All classes are new style.
1007
1008- Exceptions *must* derive from BaseException.
1009
1010- Integer division always returns a float. The -Q option is no more.
1011 All the following are gone:
1012 * PyNumber_Divide and PyNumber_InPlaceDivide
1013 * __div__, __rdiv__, and __idiv__
1014 * nb_divide, nb_inplace_divide
1015 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
1016 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
1017 if we want to re-use __div__ and friends. If we do, it will make
1018 it harder to write code for both 2.x and 3.x.)
1019
1020- 'as' and 'with' are keywords.
1021
1022- Absolute import is the default behavior for 'import foo' etc.
1023
Georg Brandl52b92cc2008-05-25 09:43:03 +00001024- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001025
Georg Brandl52b92cc2008-05-25 09:43:03 +00001026- Removed these Python builtins: apply(), callable(), coerce(),
1027 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +00001028
Georg Brandl52b92cc2008-05-25 09:43:03 +00001029- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001030
Georg Brandl52b92cc2008-05-25 09:43:03 +00001031- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001032
1033- Remove C API support for restricted execution.
1034
Guido van Rossumcf1be882007-08-30 22:07:17 +00001035- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +00001036 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +00001037 sequences of unequal length -- it now stops after the shortest one
1038 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001039
Georg Brandl52b92cc2008-05-25 09:43:03 +00001040- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001041
1042- Added class decorators per PEP 3129.
1043
1044
1045Extension Modules
1046-----------------
1047
Georg Brandl52b92cc2008-05-25 09:43:03 +00001048- Removed the imageop module. Obsolete long with its unit tests
1049 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001050
Georg Brandl52b92cc2008-05-25 09:43:03 +00001051- Removed these attributes from the operator module: div, idiv,
1052 __div__, __idiv__, isCallable, sequenceIncludes.
1053
1054- Removed these attributes from the sys module: exc_clear(), exc_type,
1055 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001056
1057
1058Library
1059-------
1060
Georg Brandl52b92cc2008-05-25 09:43:03 +00001061- Removed the compiler package. Use of the _ast module and (an
1062 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001063
Georg Brandl52b92cc2008-05-25 09:43:03 +00001064- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
1065 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
1066 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001067
Georg Brandl52b92cc2008-05-25 09:43:03 +00001068- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001069
Georg Brandl52b92cc2008-05-25 09:43:03 +00001070- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1071 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1072 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001073
Georg Brandl52b92cc2008-05-25 09:43:03 +00001074- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001075
Georg Brandl52b92cc2008-05-25 09:43:03 +00001076- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001077 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001078
Georg Brandl52b92cc2008-05-25 09:43:03 +00001079- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001080
Georg Brandl52b92cc2008-05-25 09:43:03 +00001081- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001082
1083- Patch #1680961: atexit has been reimplemented in C.
1084
Walter Dörwald41980ca2007-08-16 21:55:45 +00001085- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1086
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001087Build
1088-----
1089
1090C API
1091-----
1092
Georg Brandl52b92cc2008-05-25 09:43:03 +00001093- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001094
Georg Brandl52b92cc2008-05-25 09:43:03 +00001095- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1096 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001097
Georg Brandl52b92cc2008-05-25 09:43:03 +00001098- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001099
Georg Brandl52b92cc2008-05-25 09:43:03 +00001100- Removed these macros: staticforward, statichere, PyArg_GetInt,
1101 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001102
Georg Brandl52b92cc2008-05-25 09:43:03 +00001103- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1104 intintobjargproc, getreadbufferproc, getwritebufferproc,
1105 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001106
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001107Tests
1108-----
1109
Brett Cannone7a30f72008-03-03 03:36:27 +00001110- Removed test.testall as test.regrtest replaces it.
1111
Brett Cannonced04e02005-02-13 22:53:22 +00001112Documentation
1113-------------
1114
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001115Mac
1116---
1117
Georg Brandl52b92cc2008-05-25 09:43:03 +00001118- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001119
Guido van Rossum845702c2007-08-30 18:44:53 +00001120Platforms
1121---------
1122
1123- Support for BeOS and AtheOS was removed (according to PEP 11).
1124
1125- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1126
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001127Tools/Demos
1128-----------
1129
Georg Brandl52b92cc2008-05-25 09:43:03 +00001130
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001131**(For information about older versions, consult the HISTORY file.)**