blob: f388f11a81b316792edeba399bf5c482bec3b2f1 [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
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +000015- Issue #3660: Corrected a reference leak in str.encode() when the encoder
16 does not return a bytes object.
17
18- Issue #3774: Added a few more checks in PyTokenizer_FindEncoding to handle
Amaury Forgeot d'Arc1b933ed2008-09-04 22:34:09 +000019 error conditions.
20
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +000021- Issue #3594: Fix Parser/tokenizer.c:fp_setreadl() to open the file being
Brett Cannon8a9583e2008-09-04 05:04:25 +000022 tokenized by either a file path or file pointer for the benefit of
23 PyTokenizer_FindEncoding().
24
Antoine Pitroufff95302008-09-03 18:58:51 +000025- Issue #3696: Error parsing arguments on OpenBSD <= 4.4 and Cygwin. On
26 these systems, the mbstowcs() function is slightly buggy and must be
27 replaced with strlen() for the purpose of counting of number of wide
28 characters needed to represent the multi-byte character string.
29
Antoine Pitrou658fad82008-09-03 18:34:34 +000030- Issue #3697: "Fatal Python error: Cannot recover from stack overflow"
31 could be easily encountered under Windows in debug mode when exercising
32 the recursion limit checking code, due to bogus handling of recursion
33 limit when USE_STACKCHEK was enabled.
34
Brett Cannon54bd41d2008-09-02 04:01:42 +000035- Issue 3639: The _warnings module could segfault the interpreter when
36 unexpected types were passed in as arguments.
37
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +000038- Issue #3712: The memoryview object had a reference leak and didn't support
39 cyclic garbage collection.
40
Antoine Pitrouf71995782008-08-29 18:37:05 +000041- Issue #3668: Fix a memory leak with the "s*" argument parser in
42 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
43 was correctly parsed but parsing of subsequent arguments failed.
44
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +000045- Issue #3611: An exception __context__ could be cleared in a complex pattern
46 involving a __del__ method re-raising an exception.
47
Antoine Pitrouec569b72008-08-26 22:40:48 +000048- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
49 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
50 mechanism. In the process, fix a bug where isinstance() and issubclass(),
51 when given a tuple of classes as second argument, were looking up
52 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
53 type object.
54
Antoine Pitroue2dffc02008-08-26 22:02:58 +000055- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
56
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +000057- Issue #3651: Fix various memory leaks when using the buffer
58 interface, or when the "s#" code of PyArg_ParseTuple is given a
59 bytes object.
60
Neal Norwitz6ae2eb22008-08-24 23:50:08 +000061- Issue #3657: Fix uninitialized memory read when pickling longs.
62 Found by valgrind.
63
Neal Norwitz3ce5d922008-08-24 07:08:55 +000064- Apply security patches from Apple.
65
Neal Norwitz2f99b242008-08-24 05:48:10 +000066- Fix crashes on memory allocation failure found with failmalloc.
67
68- Fix memory leaks found with valgrind and update suppressions file.
69
70- Fix compiler warnings in opt mode which would lead to invalid memory reads.
71
72- Fix problem using wrong name in decimal module reported by pychecker.
73
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000074- Issue #3650: Fixed a reference leak in bytes.split('x').
75
Benjamin Petersonc15a0732008-08-26 16:46:47 +000076- bytes(o) now tries to use o.__bytes__() before using fallbacks.
77
78C API
79-----
80
81- PyObject_Bytes and PyBytes_FromObject were added.
82
Barry Warsaw8509df72008-08-21 03:02:47 +000083Library
84-------
85
Antoine Pitroud79dc622008-09-05 00:03:33 +000086- Issue #3660: fix a memory leak in the C accelerator of the pickle module.
87
Antoine Pitrou1d6a16b2008-09-04 21:32:09 +000088- Issue #3160: the "bdist_wininst" distutils command didn't work.
89
Guilherme Polob212b752008-09-04 11:21:31 +000090- Issue #1658: tkinter changes dict size during iteration in both
91 tkinter.BaseWidget and tkinter.scrolledtext.ScrolledText.
92
Benjamin Peterson6ba23322008-09-03 22:59:38 +000093- The bsddb module (and therefore the dbm.bsd module) has been removed.
Gregory P. Smith451e99b2008-09-04 04:46:48 +000094 It is now maintained outside of the standard library at
95 http://www.jcea.es/programacion/pybsddb.htm.
Benjamin Peterson6ba23322008-09-03 22:59:38 +000096
Facundo Batistac469d4c2008-09-03 22:49:01 +000097- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
98 to the urlparse one. Added a DeprecationWarning in the old module, it
99 will be deprecated in the future.
100
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +0000101- Issue #3719: platform.architecture() fails if there are spaces in the
102 path to the Python binary.
103
Brett Cannonec92e182008-09-02 02:46:59 +0000104- Issue 3602: As part of the merge of r66135, make the parameters on
105 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
106
Benjamin Petersonb3085c92008-09-01 23:09:31 +0000107- The deprecation warnings for the camelCase threading API names were removed.
108
Jesse Noller338f5782008-09-03 18:22:19 +0000109- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
110 SEM_VALUE_MAX.
111
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000112Extension Modules
113-----------------
114
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +0000115- Issue #2975: When compiling several extension modules with Visual Studio 2008
116 from the same python interpreter, some environment variables would grow
117 without limit.
118
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000119- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
120 exploitation of poor argument checking.
121
Jesus Cea6ba33292008-08-31 14:12:11 +0000122- bsddb code updated to version 4.7.3pre2. This code is the same than
123 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
124 The Python code is automatically translated using "2to3". Please, do not
125 update this code in Python 3.0 by hand. Update the 2.6 one and then
126 do "2to3".
127
Neal Norwitz8f2f22a2008-08-24 20:59:23 +0000128Tools/Demos
129-----------
130
131- Fix Misc/gdbinit so it works.
132
Barry Warsaw8509df72008-08-21 03:02:47 +0000133
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000134What's new in Python 3.0b3?
135===========================
136
Barry Warsaw57c10582008-08-21 02:39:51 +0000137*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000138
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000139Core and Builtins
140-----------------
141
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000142- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
143 arguments.
144
Antoine Pitrou616d2852008-08-19 22:09:34 +0000145- Issue #2394: implement more of the memoryview API, with the caveat that
146 only one-dimensional contiguous buffers are supported and exercised right
147 now. Slicing, slice assignment and comparison (equality and inequality)
148 have been added. Also, the tolist() method has been implemented, but only
149 for byte buffers. Endly, the API has been updated to return bytes objects
150 wherever it used to return bytearrays.
151
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000152- Issue #3560: clean up the new C PyMemoryView API so that naming is
153 internally consistent; add macros PyMemoryView_GET_BASE() and
154 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
155 without relying on a particular implementation; remove the ill-named
156 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
157
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000158- ctypes function pointers that are COM methods have a boolean True
159 value again.
160
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000161- Issue #1819: function calls with several named parameters are now on
162 average 35% faster (as measured by pybench).
163
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000164- The undocumented C APIs PyUnicode_AsString() and
165 PyUnicode_AsStringAndSize() were made private to the interpreter, in
166 order to be able to refine their interfaces for Python 3.1.
167
168 If you need to access the UTF-8 representation of a Unicode object
169 as bytes string, please use PyUnicode_AsUTF8String() instead.
170
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000171- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
172 to Python 3.0's stricter semantics which allow to avoid successive
173 reallocations of the result string (this also affects str.join()).
174
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000175
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000176Library
177-------
178
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000179- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
180 a build problem on MacOS with CJK locales. It adds four temporary
181 mappings to existing legacy codecs that are virtually compatible
182 with Mac encodings. They will be replaced by codecs correctly
183 implemented in 3.1.
184
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000185- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
186 "global name 'header' is not defined".
187
Antoine Pitroufd036452008-08-19 17:56:33 +0000188- Issue #2834: update the regular expression library to match the unicode
189 standards of py3k. In other words, mixing bytes and unicode strings
190 (be it as pattern, search string or replacement string) raises a TypeError.
191 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
192 and can be disabled by specifying a new re.ASCII flag; as for bytes
193 patterns, ASCII matching is the only option and trying to specify re.UNICODE
194 for such patterns raises a ValueError.
195
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000196- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
197 Code contributed by Matt Giuca. quote() now encodes the input
198 before quoting, unquote() decodes after unquoting. There are
199 new arguments to change the encoding and errors settings.
200 There are also new APIs to skip the encode/decode steps.
201 [un]quote_plus() are also affected.
202
Nick Coghlan36f49522008-08-18 12:31:52 +0000203- Issue #2235: numbers.Number now blocks inheritance of the default id()
204 based hash because that hash mechanism is not correct for numeric types.
205 All concrete numeric types that inherit from Number (rather than just
206 registering with it) must explicitly provide a hash implementation in
207 order for their instances to be hashable.
208
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000209- Issue #2676: in the email package, content-type parsing was hanging on
210 pathological input because of quadratic or exponential behaviour of a
211 regular expression.
212
Antoine Pitrou87695762008-08-14 22:44:29 +0000213- Issue #3476: binary buffered reading through the new "io" library is now
214 thread-safe.
215
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000216- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
217 menu entries were not deleted.
218
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000219- Remove the TarFileCompat class from tarfile.py.
220
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000221- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
222 accepts the same parameters. It just checks that its first argument is an
223 integer.
224
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000225- Issue #3394: zipfile.writestr sets external attributes when passed a
226 file name rather than a ZipInfo instance, so files are extracted with
227 mode 0600 rather than 000 under Unix.
228
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000229- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
230 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000231
Martin v. Löwis371bb502008-08-16 13:02:57 +0000232Extension Modules
233-----------------
234
235- Bug #3542: Support Unicode strings in _msi module.
236
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000237What's new in Python 3.0b2?
238===========================
239
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000240*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000241
242Core and Builtins
243-----------------
244
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000245- Issue #3008: the float type has a new instance method 'float.hex'
246 and a new class method 'float.fromhex' to convert floating-point
247 numbers to and from hexadecimal strings, respectively.
248
Eric Smithd68af8f2008-07-16 00:15:35 +0000249- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
250 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
251
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000252- Issue #3280: like chr(), the "%c" format now accepts unicode code points
253 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
254 "narrow Unicode" builds, the result is a string of 2 code units, forming a
255 UTF-16 surrogate pair.
256
Georg Brandld52429f2008-07-04 15:55:02 +0000257- Issue #3282: str.isprintable() should return False for undefined
258 Unicode characters.
259
Martin v. Löwis029656f2008-06-30 04:06:08 +0000260- Issue #3236: Return small longs from PyLong_FromString.
261
Benjamin Petersone6528212008-07-15 15:32:09 +0000262- Exception tracebacks now support exception chaining.
263
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000264Library
265-------
266
Brett Cannonc2542e92008-07-25 18:19:20 +0000267- Removed the sunaudio module. Use sunau instead.
268
Thomas Heller47bc8092008-08-19 06:38:12 +0000269- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
270 api functions without holding the GIL, which could lead to a fatal
271 error when they failed.
272
273- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
274
Georg Brandl30704ea02008-07-23 15:07:12 +0000275- Removed "ast" function aliases from the parser module.
276
Thomas Heller15383a02008-07-15 19:46:52 +0000277- Issue #3313: Fixed a crash when a failed dlopen() call does not set
278 a valid dlerror() message.
279
Thomas Heller0261e1e2008-07-15 17:25:07 +0000280- Issue #3258: Fixed a crash when a ctypes POINTER type to an
281 incomplete structure was created.
282
Georg Brandl1abcbf82008-07-01 19:28:43 +0000283- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
284 argument now must be a bytes object in any case.
285
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000286- Issue #3145: help("modules whatever") failed when trying to load the source
287 code of every single module of the standard library, including invalid files
288 used in the test suite.
289
Georg Brandlbded4d32008-07-17 18:15:35 +0000290- The gettext library now consistently uses Unicode strings for message ids
291 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000292
Benjamin Petersone6528212008-07-15 15:32:09 +0000293- The traceback module has been expanded to handle chained exceptions.
294
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000295C API
296-----
297
298- Issue #3247: the function Py_FindMethod was removed. Modern types should
299 use the tp_methods slot instead.
300
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000301Tools/Demos
302-----------
303
Georg Brandl336341f2008-07-01 20:21:28 +0000304- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000305
Georg Brandl336341f2008-07-01 20:21:28 +0000306- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000307
308
Brett Cannon0d71ee72008-05-08 18:13:40 +0000309What's new in Python 3.0b1?
310===========================
311
Barry Warsawc1e689e2008-06-19 00:35:43 +0000312*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000313
314Core and Builtins
315-----------------
316
Brett Cannondb734912008-06-27 00:52:15 +0000317- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
318 argument being anything other than a dict or None. Also fixed a bug in error
319 handling when 'message' and 'category' were both set to None, triggering a
320 bus error.
321
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000322- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
323 holds the last (strong) reference to its referent.
324
Georg Brandl559e5d72008-06-11 18:37:52 +0000325- Issue #2630: implement PEP 3138. repr() now returns printable
326 Unicode characters unescaped, to get an ASCII-only representation
327 of an object use ascii().
328
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000329- Issue #1342: On windows, Python could not start when installed in a
330 directory with non-ascii characters.
331
Martin v. Löwis1a214512008-06-11 05:26:20 +0000332- Implement PEP 3121: new module initialization and finalization API.
333
Georg Brandle1b5ac62008-06-04 13:06:58 +0000334- Removed the already-defunct ``-t`` option.
335
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000336- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
337 unmarshalling many code objects, which happens when importing a
338 large .pyc file (~1000 functions).
339
Georg Brandl52b92cc2008-05-25 09:43:03 +0000340- Issue #2963: fix merging oversight that disabled method cache for
341 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000342
Georg Brandlc9b09532008-05-25 09:24:38 +0000343- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
344
Georg Brandl52b92cc2008-05-25 09:43:03 +0000345- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000346
Georg Brandl52b92cc2008-05-25 09:43:03 +0000347- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
348 code now allows any unicode string and returns a utf-8 encoded
349 buffer, just like the "s#" code already does. The "z" code was
350 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000351
Georg Brandl52b92cc2008-05-25 09:43:03 +0000352- Issue #2863: generators now have a ``gen.__name__`` attribute that
353 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
354 ``func.func_code.co_name``. The repr() of a generator now also
355 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000356
357- Issue #2831: enumerate() now has a ``start`` argument.
358
Georg Brandl52b92cc2008-05-25 09:43:03 +0000359- Issue #2801: fix bug in the float.is_integer method where a
360 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000361
Georg Brandl52b92cc2008-05-25 09:43:03 +0000362- The ``--with-toolbox-glue`` option (and the associated
363 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000364
Georg Brandl52b92cc2008-05-25 09:43:03 +0000365- Issue #2196: hasattr() now lets exceptions which do not inherit
366 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
367 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000368
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000369- #3021 Exception reraising sematics have been significantly improved. However,
370 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
371 code anymore.
372
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000373- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
374 removed.
375
Brett Cannon0d71ee72008-05-08 18:13:40 +0000376Extension Modules
377-----------------
378
Georg Brandl38feaf02008-05-25 07:45:51 +0000379- Renamed ``_winreg`` module to ``winreg``.
380
Georg Brandl52b92cc2008-05-25 09:43:03 +0000381- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
382 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000383
384- Support for Windows 9x has been removed from the winsound module.
385
Georg Brandl52b92cc2008-05-25 09:43:03 +0000386- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000387
Brett Cannon0d71ee72008-05-08 18:13:40 +0000388Library
389-------
390
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000391- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
392 symtable.Symbol have been removed.
393
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000394- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
395
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000396- a new ``urllib`` package was created. It consists of code from
397 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
398 modules have all been removed. The new package has five submodules:
399 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
400 ``urllib.error``, and ``urllib.robotparser``. The
401 ``urllib.request.urlopen()`` function uses the url opener from
402 ``urllib2``. (Note that the unittests have not been renamed for the
403 beta, but they will be renamed in the future.)
404
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000405- rfc822 has been removed in favor of the email package.
406
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000407- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000408
Barry Warsawf5019422008-06-12 02:42:00 +0000409- Patch #2849: Remove use of rfc822 module from standard library.
410
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000411- Added C optimized implementation of io.StringIO.
412
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000413- The ``pickle`` module is now automatically use an optimized C
414 implementation of Pickler and Unpickler when available. The
415 ``cPickle`` module is no longer needed.
416
Georg Brandl877b10a2008-06-01 21:25:55 +0000417- Removed the ``htmllib`` and ``sgmllib`` modules.
418
Georg Brandl61013952008-05-28 15:56:30 +0000419- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
420 been removed from ``http.cookies``.
421
Brett Cannona23810f2008-05-26 19:04:21 +0000422- The ``commands`` module has been removed. Its getoutput() and
423 getstatusoutput() functions have been moved to the ``subprocess`` module.
424
Georg Brandl3d5c4252008-05-26 18:03:26 +0000425- The ``http`` package was created; it contains the old ``httplib``
426 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
427 as ``http.cookiejar``, and the content of the three ``HTTPServer``
428 modules as ``http.server``.
429
Georg Brandl38eceaa2008-05-26 11:14:17 +0000430- The ``xmlrpc`` package was created; it contains the old
431 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
432 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000433 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000434
435- The ``dbm`` package was created, containing the old modules
436 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
437 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
438 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
439 as submodules.
440
Georg Brandl52b92cc2008-05-25 09:43:03 +0000441- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000442
Georg Brandl52b92cc2008-05-25 09:43:03 +0000443- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000444
Georg Brandl52b92cc2008-05-25 09:43:03 +0000445- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000446
Georg Brandl52b92cc2008-05-25 09:43:03 +0000447- Issue #2250: Exceptions raised during evaluation of names in
448 rlcompleter's ``Completer.complete()`` method are now caught and
449 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000450
Georg Brandl52b92cc2008-05-25 09:43:03 +0000451- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
452 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000453
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000454- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
455 large to fit in a C long. ldexp(x, n) now returns a zero (with
456 suitable sign) if n is large and negative; previously, it raised
457 OverflowError.
458
Georg Brandl52b92cc2008-05-25 09:43:03 +0000459- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000460
Georg Brandl52b92cc2008-05-25 09:43:03 +0000461- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000462
Georg Brandl52b92cc2008-05-25 09:43:03 +0000463- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000464
Georg Brandl52b92cc2008-05-25 09:43:03 +0000465- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000466
Georg Brandl52b92cc2008-05-25 09:43:03 +0000467- Fixed the ``__all__`` setting on ``collections`` to include
468 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000469
Brett Cannoncf3520c2008-05-11 22:47:58 +0000470- The sre module has been removed.
471
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000472- The Queue module has been renamed to queue.
473
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000474- The copy_reg module has been renamed to copyreg.
475
Brett Cannond8b61ee2008-05-11 03:00:26 +0000476- The mhlib module has been removed.
477
Brett Cannonbd474422008-05-10 22:42:14 +0000478- The ihooks module has been removed.
479
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000480- The fpformat module has been removed.
481
Brett Cannonf4fd9932008-05-10 21:11:46 +0000482- The dircache module has been removed.
483
Brett Cannond175b4c2008-05-10 03:19:54 +0000484- The Canvas module has been removed.
485
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000486- The Decimal module gained the magic methods __round__, __ceil__,
487 __floor__ and __trunc__, to give support for round, math.ceil,
488 math.floor and math.trunc.
489
Brett Cannon900ee3a2008-05-08 20:31:11 +0000490- The user module has been removed.
491
Brett Cannon34afe872008-05-08 20:31:44 +0000492- The mutex module has been removed.
493
Brett Cannon0d71ee72008-05-08 18:13:40 +0000494- The imputil module has been removed.
495
Georg Brandl52b92cc2008-05-25 09:43:03 +0000496- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000497
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000498- pdb gained the "until" command.
499
Georg Brandl52b92cc2008-05-25 09:43:03 +0000500- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000501
Georg Brandl32de7af2008-08-18 23:07:41 +0000502- The threading module API was renamed to be PEP 8 compliant. The
503 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000504
Georg Brandl294d5a92008-06-01 19:25:32 +0000505Tools/Demos
506-----------
507
508- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000509
Brett Cannon0d71ee72008-05-08 18:13:40 +0000510Build
511-----
512
513
Barry Warsaw66079cd2008-04-04 01:36:36 +0000514What's New in Python 3.0a5?
515===========================
516
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000517*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000518
519Core and Builtins
520-----------------
521
Georg Brandl52b92cc2008-05-25 09:43:03 +0000522- Fixed misbehaviour of PyLong_FromSsize_t on systems where
523 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000524
Georg Brandl52b92cc2008-05-25 09:43:03 +0000525- Issue #2221: Corrected a SystemError "error return without exception
526 set", when the code executed by exec() raises an exception, and
527 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000528
Georg Brandl52b92cc2008-05-25 09:43:03 +0000529- Bug #2565: The repr() of type objects now calls them 'class', not
530 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000531
Martin v. Löwis790465f2008-04-05 20:41:37 +0000532- The command line processing was converted to pass Unicode strings
533 through as unmodified as possible; as a consequence, the C API
534 related to command line arguments was changed to use wchar_t.
535
Georg Brandl52b92cc2008-05-25 09:43:03 +0000536- All backslashes in raw strings are interpreted literally. This
537 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000538
Barry Warsaw66079cd2008-04-04 01:36:36 +0000539Extension Modules
540-----------------
541
542Library
543-------
544
Georg Brandl52b92cc2008-05-25 09:43:03 +0000545- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000546
Thomas Hellere106dc32008-04-24 18:39:36 +0000547- Issue #2682: ctypes callback functions now longer contain a cyclic
548 reference to themselves.
549
Georg Brandl52b92cc2008-05-25 09:43:03 +0000550- Issue #2058: Remove the buf attribute and add __slots__ to the
551 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000552
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000553- Bug #2606: Avoid calling .sort() on a dict_keys object.
554
Thomas Hellerbff533b2008-04-04 19:53:14 +0000555- The bundled libffi copy is now in sync with the recently released
556 libffi3.0.5 version, apart from some small changes to
557 Modules/_ctypes/libffi/configure.ac.
558
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000559Build
560-----
561
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000562- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
563
Guido van Rossumdc21db32008-04-07 18:37:41 +0000564- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000565 accidentally overwriting a Python 2.x installation. Use "make
566 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000567
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000568- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
569 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000570
Georg Brandl52b92cc2008-05-25 09:43:03 +0000571
Barry Warsawa9d499d2008-03-01 18:38:07 +0000572What's New in Python 3.0a4?
573===========================
574
Barry Warsawbb5cd082008-04-02 23:33:27 +0000575*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000576
Martin v. Löwis25931462008-03-17 20:43:42 +0000577Core and Builtins
578-----------------
579
580- Bug #2301: Don't try decoding the source code into the original
581 encoding for syntax errors.
582
Martin v. Löwis92fab752008-03-08 10:40:41 +0000583Extension Modules
584-----------------
585
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000586- The dl module was removed, use the ctypes module instead.
587
Martin v. Löwis92fab752008-03-08 10:40:41 +0000588- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000589
Martin v. Löwis071ef772008-03-08 11:24:24 +0000590Library
591-------
592
Georg Brandl52b92cc2008-05-25 09:43:03 +0000593- The class distutils.commands.build_py.build_py_2to3 can be used as a
594 build_py replacement to automatically run 2to3 on modules that are
595 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000596
Guido van Rossumf4169812008-03-17 22:56:06 +0000597- A new pickle protocol (protocol 3) is added with explicit support
598 for bytes. This is the default protocol. It intentionally cannot
599 be unpickled by Python 2.x.
600
601- When a pickle written by Python 2.x contains an (8-bit) str
602 instance, this is now decoded to a (Unicode) str instance. The
603 encoding used to do this defaults to ASCII, but can be overridden
604 via two new keyword arguments to the Unpickler class. Previously
605 this would create bytes instances, which is usually wrong: str
606 instances are often used to pickle attribute names etc., and text is
607 more common than binary data anyway.
608
Martin v. Löwis071ef772008-03-08 11:24:24 +0000609- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000610 system doesn't support CODESET and LANG isn't set or doesn't allow
611 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000612
Georg Brandl52b92cc2008-05-25 09:43:03 +0000613- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
614 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000615
Georg Brandl52b92cc2008-05-25 09:43:03 +0000616- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
617 has been renamed tokenize and now works with bytes rather than
618 strings. A new detect_encoding function has been added for
619 determining source file encoding according to PEP-0263. Token
620 sequences returned by tokenize always start with an ENCODING token
621 which specifies the encoding used to decode the file. This token is
622 used to encode the output of untokenize back to bytes.
623
Barry Warsawa9d499d2008-03-01 18:38:07 +0000624
Christian Heimesbc873412007-12-08 22:11:32 +0000625What's New in Python 3.0a3?
626===========================
627
Barry Warsaw659fc422008-03-01 17:45:23 +0000628*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000629
630Core and Builtins
631-----------------
632
Georg Brandl52b92cc2008-05-25 09:43:03 +0000633- Issue #2282: io.TextIOWrapper was not overriding seekable() from
634 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000635
Georg Brandl52b92cc2008-05-25 09:43:03 +0000636- Issue #2115: Important speedup in setting __slot__ attributes. Also
637 prevent a possible crash: an Abstract Base Class would try to access
638 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000639
Georg Brandl52b92cc2008-05-25 09:43:03 +0000640- Fixed repr() and str() of complex numbers with infinity or nan as
641 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000642
Georg Brandl52b92cc2008-05-25 09:43:03 +0000643- Clear all free list during a gc.collect() of the highest generation
644 in order to allow pymalloc to free more arenas. Python may give back
645 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000646
Georg Brandl52b92cc2008-05-25 09:43:03 +0000647- Issue #2045: Fix an infinite recursion triggered when printing a
648 subclass of collections.defaultdict, if its default_factory is set
649 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000650
651- Fixed a minor memory leak in dictobject.c. The content of the free
652 list was not freed on interpreter shutdown.
653
Georg Brandl52b92cc2008-05-25 09:43:03 +0000654- Limit free list of method and builtin function objects to 256
655 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000656
Georg Brandl52b92cc2008-05-25 09:43:03 +0000657- Patch #1953: Added ``sys._compact_freelists()`` and the C API
658 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000659 to compact the internal free lists of pre-allocted ints and floats.
660
661- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000662 Python expected the return type int but the fork familie returns
663 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000664
Georg Brandl52b92cc2008-05-25 09:43:03 +0000665- Issue #1678380: Fix a bug that identifies 0j and -0j when they
666 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000667
Georg Brandl52b92cc2008-05-25 09:43:03 +0000668- Issue #2025: Added tuple.count() and tuple.index() methods to comply
669 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000670
Georg Brandl52b92cc2008-05-25 09:43:03 +0000671- Fixed multiple reinitialization of the Python interpreter. The small
672 int list in longobject.c has caused a seg fault during the third
673 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000674
Georg Brandl52b92cc2008-05-25 09:43:03 +0000675- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000676
Georg Brandl52b92cc2008-05-25 09:43:03 +0000677- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000678
Georg Brandl52b92cc2008-05-25 09:43:03 +0000679- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000680
Georg Brandl52b92cc2008-05-25 09:43:03 +0000681- map() no longer accepts None for the first argument. Use zip()
682 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000683
Facundo Batista2336bdd2008-01-19 19:12:01 +0000684- Issue #1769: Now int("- 1") is not allowed any more.
685
Georg Brandl52b92cc2008-05-25 09:43:03 +0000686- Object/longobject.c: long(float('nan')) raises an OverflowError
687 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000688
Georg Brandl52b92cc2008-05-25 09:43:03 +0000689- Issue #1762972: __file__ points to the source file instead of the
690 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000691
Guido van Rossumab078dd2008-01-06 00:09:11 +0000692- Issue #1393: object_richcompare() returns NotImplemented instead of
693 False if the objects aren't equal, to give the other side a chance.
694
Guido van Rossume239b002008-01-06 00:44:20 +0000695- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000696
Georg Brandl52b92cc2008-05-25 09:43:03 +0000697- Improve some exception messages when Windows fails to load an
698 extension module. Now we get for example '%1 is not a valid Win32
699 application' instead of 'error code 193'. Also use Unicode strings
700 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000701
Georg Brandl52b92cc2008-05-25 09:43:03 +0000702- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
703 Python C API has gained a new type *PyInstanceMethod_Type* and the
704 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
705 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000706
Georg Brandl52b92cc2008-05-25 09:43:03 +0000707- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
708 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
709 are now enough to print the corresponding list of objects considered
710 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000711
Georg Brandl52b92cc2008-05-25 09:43:03 +0000712- Issue #1573: Improper use of the keyword-only syntax makes the
713 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000714
Georg Brandl52b92cc2008-05-25 09:43:03 +0000715- Issue #1564: The set implementation should special-case PyUnicode
716 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000717
Guido van Rossumea6775b2008-02-21 20:16:31 +0000718- Patch #1031213: Decode source line in SyntaxErrors back to its
719 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000720
Christian Heimes09aaa882008-02-23 15:01:06 +0000721- inspect.getsource() includes the decorators again.
722
Guido van Rossumea6775b2008-02-21 20:16:31 +0000723- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
724 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000725
Georg Brandl52b92cc2008-05-25 09:43:03 +0000726- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
727 the first chunk fed to the decoder started with a BOM, but was
728 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000729
Christian Heimesbc873412007-12-08 22:11:32 +0000730Extension Modules
731-----------------
732
Georg Brandl52b92cc2008-05-25 09:43:03 +0000733- Code for itertools ifilter(), imap(), and izip() moved to bultins
734 and renamed to filter(), map(), and zip(). Also, renamed
735 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000736
Georg Brandl52b92cc2008-05-25 09:43:03 +0000737- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000738
Georg Brandl52b92cc2008-05-25 09:43:03 +0000739- Bug #2111: mmap segfaults when trying to write a block opened with
740 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000741
Georg Brandl52b92cc2008-05-25 09:43:03 +0000742- Issue #2063: correct order of utime and stime in os.times() result
743 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000744
Christian Heimesbc873412007-12-08 22:11:32 +0000745Library
746-------
747
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000748- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000749
Georg Brandl52b92cc2008-05-25 09:43:03 +0000750- Created new UserDict class in collections module. This one inherits
751 from and complies with the MutableMapping ABC. Also, moved
752 UserString and UserList to the collections module. The
753 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000754
Guido van Rossumea6775b2008-02-21 20:16:31 +0000755- Removed UserDict.DictMixin. Replaced all its uses with
756 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000757
Guido van Rossume239b002008-01-06 00:44:20 +0000758- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000759
Guido van Rossume239b002008-01-06 00:44:20 +0000760- Issue #1585: IDLE uses non-existent xrange() function.
761
762- Issue #1578: Problems in win_getpass.
763
Georg Brandl52d168a2008-01-07 18:10:24 +0000764Build
765-----
766
Georg Brandl52b92cc2008-05-25 09:43:03 +0000767- Renamed --enable-unicode configure flag to --with-wide-unicode,
768 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000769
Guido van Rossume239b002008-01-06 00:44:20 +0000770C API
771-----
772
773- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
774 Py_TYPE and Py_REFCNT.
775
Georg Brandl52b92cc2008-05-25 09:43:03 +0000776- New API PyImport_ImportModuleNoBlock(), works like
777 PyImport_ImportModule() but won't block on the import lock
778 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000779
Christian Heimesbc873412007-12-08 22:11:32 +0000780
Fred Drake0e474a82007-10-11 18:01:43 +0000781What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000782===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000783
Guido van Rossum99533a92007-12-06 05:07:41 +0000784*Release date: 07-Dec-2007*
785
786(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000787
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000788Core and Builtins
789-----------------
790
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000791- str8 now has the same construction signature as bytes.
792
Georg Brandl52b92cc2008-05-25 09:43:03 +0000793- Comparisons between str and str8 now return False/True for ==/!=.
794 sqlite3 returns str8 when recreating on object from it's __conform__
795 value. The struct module returns str8 for all string-related
796 formats. This was true before this change, but becomes more
797 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000798
Georg Brandl52b92cc2008-05-25 09:43:03 +0000799- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
800 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000801
802- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
803
804- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000805 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000806 `PyUnicode_DecodeFSDefault(char*)` was added.
807
Georg Brandl52b92cc2008-05-25 09:43:03 +0000808- io.open() and _fileio.FileIO have grown a new argument closefd. A
809 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000810
Georg Brandl52b92cc2008-05-25 09:43:03 +0000811- Added a new option -b to issues warnings (-bb for errors) about
812 certain operations between bytes/buffer and str like str(b'') and
813 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000814
Georg Brandl52b92cc2008-05-25 09:43:03 +0000815- The standards streams sys.stdin, stdout and stderr may be None when
816 the when the C runtime library returns an invalid file descriptor
817 for the streams (fileno(stdin) < 0). For now this happens only for
818 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000819
Christian Heimesbce52be2007-11-17 19:08:41 +0000820- Added PCbuild9 directory for VS 2008.
821
Georg Brandl52b92cc2008-05-25 09:43:03 +0000822- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
823 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000824
Georg Brandl52b92cc2008-05-25 09:43:03 +0000825- Unbound methods are gone for good. ClassObject.method returns an
826 ordinary function object, instance.method still returns a bound
827 method object. The API of bound methods is cleaned up, too. The
828 im_class attribute is removed and im_func + im_self are renamed to
829 __func__ and __self__. The factory PyMethod_New takes only func and
830 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000831
Georg Brandl52b92cc2008-05-25 09:43:03 +0000832- intobject.h is no longer included by Python.h. The remains were
833 moved to longobject.h. It still exists to define several aliases
834 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000835
Christian Heimesa37d4c62007-12-04 23:02:19 +0000836- Removed sys.maxint, use sys.maxsize instead.
837
Fred Drake0e474a82007-10-11 18:01:43 +0000838Extension Modules
839-----------------
840
841- The `hotshot` profiler has been removed; use `cProfile` instead.
842
Brett Cannone9fd2312007-10-12 19:18:19 +0000843Library
844-------
845
Georg Brandl52b92cc2008-05-25 09:43:03 +0000846- When loading an external file using testfile(), the passed-in
847 encoding argument was being ignored if __loader__ is defined and
848 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000849
Georg Brandl52b92cc2008-05-25 09:43:03 +0000850- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
851 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000852
Christian Heimesc9543e42007-11-28 08:28:28 +0000853- Removed the 'new' module.
854
Georg Brandl52b92cc2008-05-25 09:43:03 +0000855- Removed all types from the 'types' module that are easily accessable
856 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000857
Georg Brandl52d168a2008-01-07 18:10:24 +0000858
Guido van Rossum4405cf32007-08-30 17:16:55 +0000859What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000860==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000861
Guido van Rossum4405cf32007-08-30 17:16:55 +0000862*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000863
864Core and Builtins
865-----------------
866
Martin v. Löwis47383402007-08-15 07:32:56 +0000867- PEP 3131: Support non-ASCII identifiers.
868
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000869- PEP 3120: Change default encoding to UTF-8.
870
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000871- PEP 3123: Use proper C inheritance for PyObject.
872
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000873- Removed the __oct__ and __hex__ special methods and added a bin()
874 builtin function.
875
Georg Brandl52b92cc2008-05-25 09:43:03 +0000876- PEP 3127: octal literals now start with "0o". Old-style octal
877 literals are invalid. There are binary literals with a prefix of
878 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000879
Guido van Rossume7ba4952007-06-06 23:52:48 +0000880- None, True, False are now keywords.
881
Guido van Rossum29478ef2007-05-29 00:39:44 +0000882- PEP 3119: isinstance() and issubclass() can be overridden.
883
Guido van Rossumebe3e162007-05-17 18:20:34 +0000884- Remove BaseException.message.
885
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000886- Remove tuple parameter unpacking (PEP 3113).
887
Georg Brandl52b92cc2008-05-25 09:43:03 +0000888- Remove the f_restricted attribute from frames. This naturally leads
889 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000890
Georg Brandl52b92cc2008-05-25 09:43:03 +0000891- PEP 3132 was accepted. That means that you can do ``a, *b =
892 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000893
Georg Brandl52b92cc2008-05-25 09:43:03 +0000894- range() now returns an iterator rather than a list. Floats are not
895 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000896
Nick Coghlan650f0d02007-04-15 12:05:43 +0000897- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000898 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000899
Guido van Rossume27dc722007-03-27 22:37:34 +0000900- By default, != returns the opposite of ==, unless the latter returns
901 NotImplemented.
902
Georg Brandl52b92cc2008-05-25 09:43:03 +0000903- Patch #1680961: sys.exitfunc has been removed and replaced with a
904 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000905
Georg Brandl801dd732007-03-18 20:18:31 +0000906- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000907 keyword arg in the class statement, which can now use the full
908 syntax of a parameter list. Also, the metaclass can implement a
909 __prepare__ function which will be called to create the dictionary
910 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000911
Georg Brandl428f0642007-03-18 18:35:15 +0000912- The long-deprecated argument "pend" of PyFloat_FromString() has been
913 removed.
914
Georg Brandle32b4222007-03-10 22:13:27 +0000915- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000916 its argument, if it exists. If not, it will work like before. This
917 allows customizing the output of dir() in the presence of a
918 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000919
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000920- Removed support for __members__ and __methods__.
921
Georg Brandle32b4222007-03-10 22:13:27 +0000922- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000923
Georg Brandle32b4222007-03-10 22:13:27 +0000924- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000925 functionality formerly known as raw_input(); the name raw_input() is
926 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000927
Georg Brandl52b92cc2008-05-25 09:43:03 +0000928- Classes listed in an 'except' clause must inherit from
929 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000930
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000931- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000932 and .keys(), .items(), .values() return dict views, which behave
933 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000934
Guido van Rossum8b545362007-02-09 23:52:14 +0000935- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000936 'softspace' attribute of files is now gone (since print() doesn't
937 use it). A side effect of this change is that you can get
938 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000939
940 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000941 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000942
943 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000944
Brett Cannon398db8b2007-01-29 23:44:37 +0000945- PEP 3102: keyword-only arguments.
946
Georg Brandl52b92cc2008-05-25 09:43:03 +0000947- Int/Long unification is complete. The 'long' built-in type and
948 literals with trailing 'L' or 'l' have been removed. Performance
949 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000950
951- 'except E, V' must now be spelled as 'except E as V' and deletes V
952 at the end of the except clause; V must be a simple name.
953
Neal Norwitzc1505362006-12-28 06:47:50 +0000954- Added function annotations per PEP 3107.
955
Georg Brandl52b92cc2008-05-25 09:43:03 +0000956- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000957
958 >>> def f(x):
959 ... def inc():
960 ... nonlocal x
961 ... x += 1
962 ... return x
963 ... return inc
964 ...
965 >>> inc = f(0)
966 >>> inc()
967 1
968 >>> inc()
969 2
970
Georg Brandl66a796e2006-12-19 20:50:34 +0000971- Moved intern() to sys.intern().
972
973- exec is now a function.
974
975- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000976
Neal Norwitz4886cc32006-08-21 17:06:07 +0000977- Classic classes are a thing of the past. All classes are new style.
978
979- Exceptions *must* derive from BaseException.
980
981- Integer division always returns a float. The -Q option is no more.
982 All the following are gone:
983 * PyNumber_Divide and PyNumber_InPlaceDivide
984 * __div__, __rdiv__, and __idiv__
985 * nb_divide, nb_inplace_divide
986 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
987 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
988 if we want to re-use __div__ and friends. If we do, it will make
989 it harder to write code for both 2.x and 3.x.)
990
991- 'as' and 'with' are keywords.
992
993- Absolute import is the default behavior for 'import foo' etc.
994
Georg Brandl52b92cc2008-05-25 09:43:03 +0000995- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000996
Georg Brandl52b92cc2008-05-25 09:43:03 +0000997- Removed these Python builtins: apply(), callable(), coerce(),
998 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000999
Georg Brandl52b92cc2008-05-25 09:43:03 +00001000- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001001
Georg Brandl52b92cc2008-05-25 09:43:03 +00001002- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001003
1004- Remove C API support for restricted execution.
1005
Guido van Rossumcf1be882007-08-30 22:07:17 +00001006- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +00001007 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +00001008 sequences of unequal length -- it now stops after the shortest one
1009 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001010
Georg Brandl52b92cc2008-05-25 09:43:03 +00001011- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001012
1013- Added class decorators per PEP 3129.
1014
1015
1016Extension Modules
1017-----------------
1018
Georg Brandl52b92cc2008-05-25 09:43:03 +00001019- Removed the imageop module. Obsolete long with its unit tests
1020 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001021
Georg Brandl52b92cc2008-05-25 09:43:03 +00001022- Removed these attributes from the operator module: div, idiv,
1023 __div__, __idiv__, isCallable, sequenceIncludes.
1024
1025- Removed these attributes from the sys module: exc_clear(), exc_type,
1026 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001027
1028
1029Library
1030-------
1031
Georg Brandl52b92cc2008-05-25 09:43:03 +00001032- Removed the compiler package. Use of the _ast module and (an
1033 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001034
Georg Brandl52b92cc2008-05-25 09:43:03 +00001035- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
1036 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
1037 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001038
Georg Brandl52b92cc2008-05-25 09:43:03 +00001039- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001040
Georg Brandl52b92cc2008-05-25 09:43:03 +00001041- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1042 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1043 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001044
Georg Brandl52b92cc2008-05-25 09:43:03 +00001045- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001046
Georg Brandl52b92cc2008-05-25 09:43:03 +00001047- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001048 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001049
Georg Brandl52b92cc2008-05-25 09:43:03 +00001050- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001051
Georg Brandl52b92cc2008-05-25 09:43:03 +00001052- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001053
1054- Patch #1680961: atexit has been reimplemented in C.
1055
Walter Dörwald41980ca2007-08-16 21:55:45 +00001056- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1057
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001058Build
1059-----
1060
1061C API
1062-----
1063
Georg Brandl52b92cc2008-05-25 09:43:03 +00001064- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001065
Georg Brandl52b92cc2008-05-25 09:43:03 +00001066- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1067 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001068
Georg Brandl52b92cc2008-05-25 09:43:03 +00001069- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001070
Georg Brandl52b92cc2008-05-25 09:43:03 +00001071- Removed these macros: staticforward, statichere, PyArg_GetInt,
1072 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001073
Georg Brandl52b92cc2008-05-25 09:43:03 +00001074- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1075 intintobjargproc, getreadbufferproc, getwritebufferproc,
1076 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001077
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001078Tests
1079-----
1080
Brett Cannone7a30f72008-03-03 03:36:27 +00001081- Removed test.testall as test.regrtest replaces it.
1082
Brett Cannonced04e02005-02-13 22:53:22 +00001083Documentation
1084-------------
1085
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001086Mac
1087---
1088
Georg Brandl52b92cc2008-05-25 09:43:03 +00001089- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001090
Guido van Rossum845702c2007-08-30 18:44:53 +00001091Platforms
1092---------
1093
1094- Support for BeOS and AtheOS was removed (according to PEP 11).
1095
1096- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1097
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001098Tools/Demos
1099-----------
1100
Georg Brandl52b92cc2008-05-25 09:43:03 +00001101
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001102**(For information about older versions, consult the HISTORY file.)**