blob: c2734c8b9499fbe4e5bb92b076eed3712cac9090 [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
Benjamin Peterson5e19e442008-09-10 21:47:03 +000015- Issue #3827: memoryview lost its size attribute in favor of using len(view).
16
Hirokazu Yamamoto167b12b2008-09-09 14:01:25 +000017- Issue #3813: could not lanch python.exe via symbolic link on cygwin.
18
Antoine Pitrou5651eaa2008-09-06 20:46:58 +000019- Issue #3705: fix crash when given a non-ascii value on the command line for
Amaury Forgeot d'Arc8530e852008-09-09 07:28:22 +000020 the "-c" and "-m" parameters. Now the behaviour is as expected under Linux,
21 although under Windows it fails at a later point.
Antoine Pitrou5651eaa2008-09-06 20:46:58 +000022
Benjamin Peterson791dc2f2008-09-05 23:27:15 +000023- Issue #3279: Importing site at interpreter was failing silently because the
24 site module uses the open builtin which was not initialized at the time.
25
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +000026- Issue #3660: Corrected a reference leak in str.encode() when the encoder
27 does not return a bytes object.
28
29- Issue #3774: Added a few more checks in PyTokenizer_FindEncoding to handle
Amaury Forgeot d'Arc1b933ed2008-09-04 22:34:09 +000030 error conditions.
31
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +000032- Issue #3594: Fix Parser/tokenizer.c:fp_setreadl() to open the file being
Brett Cannon8a9583e2008-09-04 05:04:25 +000033 tokenized by either a file path or file pointer for the benefit of
34 PyTokenizer_FindEncoding().
35
Antoine Pitroufff95302008-09-03 18:58:51 +000036- Issue #3696: Error parsing arguments on OpenBSD <= 4.4 and Cygwin. On
37 these systems, the mbstowcs() function is slightly buggy and must be
38 replaced with strlen() for the purpose of counting of number of wide
39 characters needed to represent the multi-byte character string.
40
Antoine Pitrou658fad82008-09-03 18:34:34 +000041- Issue #3697: "Fatal Python error: Cannot recover from stack overflow"
42 could be easily encountered under Windows in debug mode when exercising
43 the recursion limit checking code, due to bogus handling of recursion
44 limit when USE_STACKCHEK was enabled.
45
Brett Cannon54bd41d2008-09-02 04:01:42 +000046- Issue 3639: The _warnings module could segfault the interpreter when
47 unexpected types were passed in as arguments.
48
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +000049- Issue #3712: The memoryview object had a reference leak and didn't support
50 cyclic garbage collection.
51
Antoine Pitrouf71995782008-08-29 18:37:05 +000052- Issue #3668: Fix a memory leak with the "s*" argument parser in
53 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
54 was correctly parsed but parsing of subsequent arguments failed.
55
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +000056- Issue #3611: An exception __context__ could be cleared in a complex pattern
57 involving a __del__ method re-raising an exception.
58
Antoine Pitrouec569b72008-08-26 22:40:48 +000059- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
60 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
61 mechanism. In the process, fix a bug where isinstance() and issubclass(),
62 when given a tuple of classes as second argument, were looking up
63 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
64 type object.
65
Antoine Pitroue2dffc02008-08-26 22:02:58 +000066- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
67
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +000068- Issue #3651: Fix various memory leaks when using the buffer
69 interface, or when the "s#" code of PyArg_ParseTuple is given a
70 bytes object.
71
Neal Norwitz6ae2eb22008-08-24 23:50:08 +000072- Issue #3657: Fix uninitialized memory read when pickling longs.
73 Found by valgrind.
74
Neal Norwitz3ce5d922008-08-24 07:08:55 +000075- Apply security patches from Apple.
76
Neal Norwitz2f99b242008-08-24 05:48:10 +000077- Fix crashes on memory allocation failure found with failmalloc.
78
79- Fix memory leaks found with valgrind and update suppressions file.
80
81- Fix compiler warnings in opt mode which would lead to invalid memory reads.
82
83- Fix problem using wrong name in decimal module reported by pychecker.
84
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000085- Issue #3650: Fixed a reference leak in bytes.split('x').
86
Benjamin Petersonc15a0732008-08-26 16:46:47 +000087- bytes(o) now tries to use o.__bytes__() before using fallbacks.
88
Gregory P. Smith207f2112008-09-07 06:29:10 +000089- Issue #1204: The configure script now tests for additional libraries
90 that may be required when linking against readline. This fixes issues
91 with x86_64 builds on some platforms (a few Linux flavors and OpenBSD).
92
Benjamin Petersonc15a0732008-08-26 16:46:47 +000093C API
94-----
95
96- PyObject_Bytes and PyBytes_FromObject were added.
97
Barry Warsaw8509df72008-08-21 03:02:47 +000098Library
99-------
100
Guido van Rossum698280d2008-09-10 17:44:35 +0000101- Issue #3756: make re.escape() handle bytes as well as str.
102
Georg Brandl7cd67cc2008-09-09 19:31:25 +0000103- Issue #3800: fix filter() related bug in formatter.py.
104
Antoine Pitrou5fe291f2008-09-06 23:00:03 +0000105- Issue #874900: fix behaviour of threading module after a fork.
106
Antoine Pitrou9e4fdf42008-09-05 23:43:02 +0000107- Issue #3535: zipfile couldn't read some zip files larger than 2GB.
108
109- Issue #3776: Deprecate the bsddb package for removal in 3.0.
110
111- Issue #3762: platform.architecture() fails if python is lanched via
112 its symbolic link.
113
Antoine Pitroud79dc622008-09-05 00:03:33 +0000114- Issue #3660: fix a memory leak in the C accelerator of the pickle module.
115
Antoine Pitrou1d6a16b2008-09-04 21:32:09 +0000116- Issue #3160: the "bdist_wininst" distutils command didn't work.
117
Guilherme Polob212b752008-09-04 11:21:31 +0000118- Issue #1658: tkinter changes dict size during iteration in both
119 tkinter.BaseWidget and tkinter.scrolledtext.ScrolledText.
120
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000121- The bsddb module (and therefore the dbm.bsd module) has been removed.
Gregory P. Smith451e99b2008-09-04 04:46:48 +0000122 It is now maintained outside of the standard library at
123 http://www.jcea.es/programacion/pybsddb.htm.
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000124
Facundo Batistac469d4c2008-09-03 22:49:01 +0000125- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
126 to the urlparse one. Added a DeprecationWarning in the old module, it
127 will be deprecated in the future.
128
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +0000129- Issue #3719: platform.architecture() fails if there are spaces in the
130 path to the Python binary.
131
Brett Cannonec92e182008-09-02 02:46:59 +0000132- Issue 3602: As part of the merge of r66135, make the parameters on
133 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
134
Benjamin Petersonb3085c92008-09-01 23:09:31 +0000135- The deprecation warnings for the camelCase threading API names were removed.
136
Jesse Noller338f5782008-09-03 18:22:19 +0000137- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
138 SEM_VALUE_MAX.
139
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000140Extension Modules
141-----------------
142
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +0000143- Issue #2975: When compiling several extension modules with Visual Studio 2008
144 from the same python interpreter, some environment variables would grow
145 without limit.
146
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000147- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
148 exploitation of poor argument checking.
149
Jesus Cea6ba33292008-08-31 14:12:11 +0000150- bsddb code updated to version 4.7.3pre2. This code is the same than
151 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
152 The Python code is automatically translated using "2to3". Please, do not
153 update this code in Python 3.0 by hand. Update the 2.6 one and then
154 do "2to3".
155
Benjamin Peterson791dc2f2008-09-05 23:27:15 +0000156- The _bytesio and _stringio modules are now compiled into the python binary.
157
Gregory P. Smith693fc462008-09-06 20:13:06 +0000158- Issue #3492 and #3790: Fixed the zlib module and zipimport module uses of
159 mutable bytearray objects where they should have been using immutable bytes.
160
Gregory P. Smith0a608fd2008-09-06 21:34:51 +0000161- Issue #3797: Fixed the dbm, marshal, mmap, ossaudiodev, & winreg modules to
162 return bytes objects instead of bytearray objects.
163
Gregory P. Smith693fc462008-09-06 20:13:06 +0000164
Neal Norwitz8f2f22a2008-08-24 20:59:23 +0000165Tools/Demos
166-----------
167
168- Fix Misc/gdbinit so it works.
169
Barry Warsaw8509df72008-08-21 03:02:47 +0000170
Amaury Forgeot d'Arcf7bfcfb2008-09-09 06:42:00 +0000171Build
172-----
173
Hirokazu Yamamoto54a1cc62008-09-09 17:55:11 +0000174- Issue #3812: Failed to build python if configure --without-threads.
175
Amaury Forgeot d'Arcf7bfcfb2008-09-09 06:42:00 +0000176- Issue #3791: Remove the bsddb module from the Windows installer, and the
177 core bsddb library from the Windows build files.
178
179
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000180What's new in Python 3.0b3?
181===========================
182
Barry Warsaw57c10582008-08-21 02:39:51 +0000183*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000184
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000185Core and Builtins
186-----------------
187
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000188- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
189 arguments.
190
Antoine Pitrou616d2852008-08-19 22:09:34 +0000191- Issue #2394: implement more of the memoryview API, with the caveat that
192 only one-dimensional contiguous buffers are supported and exercised right
193 now. Slicing, slice assignment and comparison (equality and inequality)
194 have been added. Also, the tolist() method has been implemented, but only
195 for byte buffers. Endly, the API has been updated to return bytes objects
196 wherever it used to return bytearrays.
197
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000198- Issue #3560: clean up the new C PyMemoryView API so that naming is
199 internally consistent; add macros PyMemoryView_GET_BASE() and
200 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
201 without relying on a particular implementation; remove the ill-named
202 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
203
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000204- ctypes function pointers that are COM methods have a boolean True
205 value again.
206
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000207- Issue #1819: function calls with several named parameters are now on
208 average 35% faster (as measured by pybench).
209
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000210- The undocumented C APIs PyUnicode_AsString() and
211 PyUnicode_AsStringAndSize() were made private to the interpreter, in
212 order to be able to refine their interfaces for Python 3.1.
213
214 If you need to access the UTF-8 representation of a Unicode object
215 as bytes string, please use PyUnicode_AsUTF8String() instead.
216
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000217- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
218 to Python 3.0's stricter semantics which allow to avoid successive
219 reallocations of the result string (this also affects str.join()).
220
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000221
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000222Library
223-------
224
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000225- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
226 a build problem on MacOS with CJK locales. It adds four temporary
227 mappings to existing legacy codecs that are virtually compatible
228 with Mac encodings. They will be replaced by codecs correctly
229 implemented in 3.1.
230
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000231- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
232 "global name 'header' is not defined".
233
Antoine Pitroufd036452008-08-19 17:56:33 +0000234- Issue #2834: update the regular expression library to match the unicode
235 standards of py3k. In other words, mixing bytes and unicode strings
236 (be it as pattern, search string or replacement string) raises a TypeError.
237 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
238 and can be disabled by specifying a new re.ASCII flag; as for bytes
239 patterns, ASCII matching is the only option and trying to specify re.UNICODE
240 for such patterns raises a ValueError.
241
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000242- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
243 Code contributed by Matt Giuca. quote() now encodes the input
244 before quoting, unquote() decodes after unquoting. There are
245 new arguments to change the encoding and errors settings.
246 There are also new APIs to skip the encode/decode steps.
247 [un]quote_plus() are also affected.
248
Nick Coghlan36f49522008-08-18 12:31:52 +0000249- Issue #2235: numbers.Number now blocks inheritance of the default id()
250 based hash because that hash mechanism is not correct for numeric types.
251 All concrete numeric types that inherit from Number (rather than just
252 registering with it) must explicitly provide a hash implementation in
253 order for their instances to be hashable.
254
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000255- Issue #2676: in the email package, content-type parsing was hanging on
256 pathological input because of quadratic or exponential behaviour of a
257 regular expression.
258
Antoine Pitrou87695762008-08-14 22:44:29 +0000259- Issue #3476: binary buffered reading through the new "io" library is now
260 thread-safe.
261
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000262- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
263 menu entries were not deleted.
264
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000265- Remove the TarFileCompat class from tarfile.py.
266
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000267- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
268 accepts the same parameters. It just checks that its first argument is an
269 integer.
270
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000271- Issue #3394: zipfile.writestr sets external attributes when passed a
272 file name rather than a ZipInfo instance, so files are extracted with
273 mode 0600 rather than 000 under Unix.
274
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000275- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
276 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000277
Martin v. Löwis371bb502008-08-16 13:02:57 +0000278Extension Modules
279-----------------
280
281- Bug #3542: Support Unicode strings in _msi module.
282
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000283What's new in Python 3.0b2?
284===========================
285
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000286*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000287
288Core and Builtins
289-----------------
290
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000291- Issue #3008: the float type has a new instance method 'float.hex'
292 and a new class method 'float.fromhex' to convert floating-point
293 numbers to and from hexadecimal strings, respectively.
294
Eric Smithd68af8f2008-07-16 00:15:35 +0000295- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
296 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
297
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000298- Issue #3280: like chr(), the "%c" format now accepts unicode code points
299 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
300 "narrow Unicode" builds, the result is a string of 2 code units, forming a
301 UTF-16 surrogate pair.
302
Georg Brandld52429f2008-07-04 15:55:02 +0000303- Issue #3282: str.isprintable() should return False for undefined
304 Unicode characters.
305
Martin v. Löwis029656f2008-06-30 04:06:08 +0000306- Issue #3236: Return small longs from PyLong_FromString.
307
Benjamin Petersone6528212008-07-15 15:32:09 +0000308- Exception tracebacks now support exception chaining.
309
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000310Library
311-------
312
Brett Cannonc2542e92008-07-25 18:19:20 +0000313- Removed the sunaudio module. Use sunau instead.
314
Thomas Heller47bc8092008-08-19 06:38:12 +0000315- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
316 api functions without holding the GIL, which could lead to a fatal
317 error when they failed.
318
319- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
320
Georg Brandl30704ea02008-07-23 15:07:12 +0000321- Removed "ast" function aliases from the parser module.
322
Thomas Heller15383a02008-07-15 19:46:52 +0000323- Issue #3313: Fixed a crash when a failed dlopen() call does not set
324 a valid dlerror() message.
325
Thomas Heller0261e1e2008-07-15 17:25:07 +0000326- Issue #3258: Fixed a crash when a ctypes POINTER type to an
327 incomplete structure was created.
328
Georg Brandl1abcbf82008-07-01 19:28:43 +0000329- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
330 argument now must be a bytes object in any case.
331
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000332- Issue #3145: help("modules whatever") failed when trying to load the source
333 code of every single module of the standard library, including invalid files
334 used in the test suite.
335
Georg Brandlbded4d32008-07-17 18:15:35 +0000336- The gettext library now consistently uses Unicode strings for message ids
337 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000338
Benjamin Petersone6528212008-07-15 15:32:09 +0000339- The traceback module has been expanded to handle chained exceptions.
340
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000341C API
342-----
343
344- Issue #3247: the function Py_FindMethod was removed. Modern types should
345 use the tp_methods slot instead.
346
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000347Tools/Demos
348-----------
349
Georg Brandl336341f2008-07-01 20:21:28 +0000350- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000351
Georg Brandl336341f2008-07-01 20:21:28 +0000352- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000353
354
Brett Cannon0d71ee72008-05-08 18:13:40 +0000355What's new in Python 3.0b1?
356===========================
357
Barry Warsawc1e689e2008-06-19 00:35:43 +0000358*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000359
360Core and Builtins
361-----------------
362
Brett Cannondb734912008-06-27 00:52:15 +0000363- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
364 argument being anything other than a dict or None. Also fixed a bug in error
365 handling when 'message' and 'category' were both set to None, triggering a
366 bus error.
367
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000368- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
369 holds the last (strong) reference to its referent.
370
Georg Brandl559e5d72008-06-11 18:37:52 +0000371- Issue #2630: implement PEP 3138. repr() now returns printable
372 Unicode characters unescaped, to get an ASCII-only representation
373 of an object use ascii().
374
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000375- Issue #1342: On windows, Python could not start when installed in a
376 directory with non-ascii characters.
377
Martin v. Löwis1a214512008-06-11 05:26:20 +0000378- Implement PEP 3121: new module initialization and finalization API.
379
Georg Brandle1b5ac62008-06-04 13:06:58 +0000380- Removed the already-defunct ``-t`` option.
381
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000382- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
383 unmarshalling many code objects, which happens when importing a
384 large .pyc file (~1000 functions).
385
Georg Brandl52b92cc2008-05-25 09:43:03 +0000386- Issue #2963: fix merging oversight that disabled method cache for
387 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000388
Georg Brandlc9b09532008-05-25 09:24:38 +0000389- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
390
Georg Brandl52b92cc2008-05-25 09:43:03 +0000391- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000392
Georg Brandl52b92cc2008-05-25 09:43:03 +0000393- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
394 code now allows any unicode string and returns a utf-8 encoded
395 buffer, just like the "s#" code already does. The "z" code was
396 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000397
Georg Brandl52b92cc2008-05-25 09:43:03 +0000398- Issue #2863: generators now have a ``gen.__name__`` attribute that
399 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
400 ``func.func_code.co_name``. The repr() of a generator now also
401 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000402
403- Issue #2831: enumerate() now has a ``start`` argument.
404
Georg Brandl52b92cc2008-05-25 09:43:03 +0000405- Issue #2801: fix bug in the float.is_integer method where a
406 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000407
Georg Brandl52b92cc2008-05-25 09:43:03 +0000408- The ``--with-toolbox-glue`` option (and the associated
409 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000410
Georg Brandl52b92cc2008-05-25 09:43:03 +0000411- Issue #2196: hasattr() now lets exceptions which do not inherit
412 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
413 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000414
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000415- #3021 Exception reraising sematics have been significantly improved. However,
416 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
417 code anymore.
418
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000419- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
420 removed.
421
Brett Cannon0d71ee72008-05-08 18:13:40 +0000422Extension Modules
423-----------------
424
Georg Brandl38feaf02008-05-25 07:45:51 +0000425- Renamed ``_winreg`` module to ``winreg``.
426
Georg Brandl52b92cc2008-05-25 09:43:03 +0000427- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
428 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000429
430- Support for Windows 9x has been removed from the winsound module.
431
Georg Brandl52b92cc2008-05-25 09:43:03 +0000432- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000433
Brett Cannon0d71ee72008-05-08 18:13:40 +0000434Library
435-------
436
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000437- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
438 symtable.Symbol have been removed.
439
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000440- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
441
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000442- a new ``urllib`` package was created. It consists of code from
443 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
444 modules have all been removed. The new package has five submodules:
445 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
446 ``urllib.error``, and ``urllib.robotparser``. The
447 ``urllib.request.urlopen()`` function uses the url opener from
448 ``urllib2``. (Note that the unittests have not been renamed for the
449 beta, but they will be renamed in the future.)
450
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000451- rfc822 has been removed in favor of the email package.
452
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000453- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000454
Barry Warsawf5019422008-06-12 02:42:00 +0000455- Patch #2849: Remove use of rfc822 module from standard library.
456
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000457- Added C optimized implementation of io.StringIO.
458
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000459- The ``pickle`` module is now automatically use an optimized C
460 implementation of Pickler and Unpickler when available. The
461 ``cPickle`` module is no longer needed.
462
Georg Brandl877b10a2008-06-01 21:25:55 +0000463- Removed the ``htmllib`` and ``sgmllib`` modules.
464
Georg Brandl61013952008-05-28 15:56:30 +0000465- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
466 been removed from ``http.cookies``.
467
Brett Cannona23810f2008-05-26 19:04:21 +0000468- The ``commands`` module has been removed. Its getoutput() and
469 getstatusoutput() functions have been moved to the ``subprocess`` module.
470
Georg Brandl3d5c4252008-05-26 18:03:26 +0000471- The ``http`` package was created; it contains the old ``httplib``
472 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
473 as ``http.cookiejar``, and the content of the three ``HTTPServer``
474 modules as ``http.server``.
475
Georg Brandl38eceaa2008-05-26 11:14:17 +0000476- The ``xmlrpc`` package was created; it contains the old
477 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
478 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000479 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000480
481- The ``dbm`` package was created, containing the old modules
482 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
483 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
484 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
485 as submodules.
486
Georg Brandl52b92cc2008-05-25 09:43:03 +0000487- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000488
Georg Brandl52b92cc2008-05-25 09:43:03 +0000489- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000490
Georg Brandl52b92cc2008-05-25 09:43:03 +0000491- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000492
Georg Brandl52b92cc2008-05-25 09:43:03 +0000493- Issue #2250: Exceptions raised during evaluation of names in
494 rlcompleter's ``Completer.complete()`` method are now caught and
495 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000496
Georg Brandl52b92cc2008-05-25 09:43:03 +0000497- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
498 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000499
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000500- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
501 large to fit in a C long. ldexp(x, n) now returns a zero (with
502 suitable sign) if n is large and negative; previously, it raised
503 OverflowError.
504
Georg Brandl52b92cc2008-05-25 09:43:03 +0000505- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000506
Georg Brandl52b92cc2008-05-25 09:43:03 +0000507- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000508
Georg Brandl52b92cc2008-05-25 09:43:03 +0000509- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000510
Georg Brandl52b92cc2008-05-25 09:43:03 +0000511- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000512
Georg Brandl52b92cc2008-05-25 09:43:03 +0000513- Fixed the ``__all__`` setting on ``collections`` to include
514 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000515
Brett Cannoncf3520c2008-05-11 22:47:58 +0000516- The sre module has been removed.
517
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000518- The Queue module has been renamed to queue.
519
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000520- The copy_reg module has been renamed to copyreg.
521
Brett Cannond8b61ee2008-05-11 03:00:26 +0000522- The mhlib module has been removed.
523
Brett Cannonbd474422008-05-10 22:42:14 +0000524- The ihooks module has been removed.
525
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000526- The fpformat module has been removed.
527
Brett Cannonf4fd9932008-05-10 21:11:46 +0000528- The dircache module has been removed.
529
Brett Cannond175b4c2008-05-10 03:19:54 +0000530- The Canvas module has been removed.
531
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000532- The Decimal module gained the magic methods __round__, __ceil__,
533 __floor__ and __trunc__, to give support for round, math.ceil,
534 math.floor and math.trunc.
535
Brett Cannon900ee3a2008-05-08 20:31:11 +0000536- The user module has been removed.
537
Brett Cannon34afe872008-05-08 20:31:44 +0000538- The mutex module has been removed.
539
Brett Cannon0d71ee72008-05-08 18:13:40 +0000540- The imputil module has been removed.
541
Georg Brandl52b92cc2008-05-25 09:43:03 +0000542- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000543
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000544- pdb gained the "until" command.
545
Georg Brandl52b92cc2008-05-25 09:43:03 +0000546- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000547
Georg Brandl32de7af2008-08-18 23:07:41 +0000548- The threading module API was renamed to be PEP 8 compliant. The
549 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000550
Georg Brandl294d5a92008-06-01 19:25:32 +0000551Tools/Demos
552-----------
553
554- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000555
Brett Cannon0d71ee72008-05-08 18:13:40 +0000556Build
557-----
558
559
Barry Warsaw66079cd2008-04-04 01:36:36 +0000560What's New in Python 3.0a5?
561===========================
562
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000563*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000564
565Core and Builtins
566-----------------
567
Georg Brandl52b92cc2008-05-25 09:43:03 +0000568- Fixed misbehaviour of PyLong_FromSsize_t on systems where
569 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000570
Georg Brandl52b92cc2008-05-25 09:43:03 +0000571- Issue #2221: Corrected a SystemError "error return without exception
572 set", when the code executed by exec() raises an exception, and
573 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000574
Georg Brandl52b92cc2008-05-25 09:43:03 +0000575- Bug #2565: The repr() of type objects now calls them 'class', not
576 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000577
Martin v. Löwis790465f2008-04-05 20:41:37 +0000578- The command line processing was converted to pass Unicode strings
579 through as unmodified as possible; as a consequence, the C API
580 related to command line arguments was changed to use wchar_t.
581
Georg Brandl52b92cc2008-05-25 09:43:03 +0000582- All backslashes in raw strings are interpreted literally. This
583 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000584
Barry Warsaw66079cd2008-04-04 01:36:36 +0000585Extension Modules
586-----------------
587
588Library
589-------
590
Georg Brandl52b92cc2008-05-25 09:43:03 +0000591- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000592
Thomas Hellere106dc32008-04-24 18:39:36 +0000593- Issue #2682: ctypes callback functions now longer contain a cyclic
594 reference to themselves.
595
Georg Brandl52b92cc2008-05-25 09:43:03 +0000596- Issue #2058: Remove the buf attribute and add __slots__ to the
597 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000598
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000599- Bug #2606: Avoid calling .sort() on a dict_keys object.
600
Thomas Hellerbff533b2008-04-04 19:53:14 +0000601- The bundled libffi copy is now in sync with the recently released
602 libffi3.0.5 version, apart from some small changes to
603 Modules/_ctypes/libffi/configure.ac.
604
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000605Build
606-----
607
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000608- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
609
Guido van Rossumdc21db32008-04-07 18:37:41 +0000610- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000611 accidentally overwriting a Python 2.x installation. Use "make
612 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000613
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000614- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
615 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000616
Georg Brandl52b92cc2008-05-25 09:43:03 +0000617
Barry Warsawa9d499d2008-03-01 18:38:07 +0000618What's New in Python 3.0a4?
619===========================
620
Barry Warsawbb5cd082008-04-02 23:33:27 +0000621*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000622
Martin v. Löwis25931462008-03-17 20:43:42 +0000623Core and Builtins
624-----------------
625
626- Bug #2301: Don't try decoding the source code into the original
627 encoding for syntax errors.
628
Martin v. Löwis92fab752008-03-08 10:40:41 +0000629Extension Modules
630-----------------
631
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000632- The dl module was removed, use the ctypes module instead.
633
Martin v. Löwis92fab752008-03-08 10:40:41 +0000634- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000635
Martin v. Löwis071ef772008-03-08 11:24:24 +0000636Library
637-------
638
Georg Brandl52b92cc2008-05-25 09:43:03 +0000639- The class distutils.commands.build_py.build_py_2to3 can be used as a
640 build_py replacement to automatically run 2to3 on modules that are
641 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000642
Guido van Rossumf4169812008-03-17 22:56:06 +0000643- A new pickle protocol (protocol 3) is added with explicit support
644 for bytes. This is the default protocol. It intentionally cannot
645 be unpickled by Python 2.x.
646
647- When a pickle written by Python 2.x contains an (8-bit) str
648 instance, this is now decoded to a (Unicode) str instance. The
649 encoding used to do this defaults to ASCII, but can be overridden
650 via two new keyword arguments to the Unpickler class. Previously
651 this would create bytes instances, which is usually wrong: str
652 instances are often used to pickle attribute names etc., and text is
653 more common than binary data anyway.
654
Martin v. Löwis071ef772008-03-08 11:24:24 +0000655- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000656 system doesn't support CODESET and LANG isn't set or doesn't allow
657 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000658
Georg Brandl52b92cc2008-05-25 09:43:03 +0000659- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
660 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000661
Georg Brandl52b92cc2008-05-25 09:43:03 +0000662- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
663 has been renamed tokenize and now works with bytes rather than
664 strings. A new detect_encoding function has been added for
665 determining source file encoding according to PEP-0263. Token
666 sequences returned by tokenize always start with an ENCODING token
667 which specifies the encoding used to decode the file. This token is
668 used to encode the output of untokenize back to bytes.
669
Barry Warsawa9d499d2008-03-01 18:38:07 +0000670
Christian Heimesbc873412007-12-08 22:11:32 +0000671What's New in Python 3.0a3?
672===========================
673
Barry Warsaw659fc422008-03-01 17:45:23 +0000674*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000675
676Core and Builtins
677-----------------
678
Georg Brandl52b92cc2008-05-25 09:43:03 +0000679- Issue #2282: io.TextIOWrapper was not overriding seekable() from
680 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000681
Georg Brandl52b92cc2008-05-25 09:43:03 +0000682- Issue #2115: Important speedup in setting __slot__ attributes. Also
683 prevent a possible crash: an Abstract Base Class would try to access
684 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000685
Georg Brandl52b92cc2008-05-25 09:43:03 +0000686- Fixed repr() and str() of complex numbers with infinity or nan as
687 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000688
Georg Brandl52b92cc2008-05-25 09:43:03 +0000689- Clear all free list during a gc.collect() of the highest generation
690 in order to allow pymalloc to free more arenas. Python may give back
691 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000692
Georg Brandl52b92cc2008-05-25 09:43:03 +0000693- Issue #2045: Fix an infinite recursion triggered when printing a
694 subclass of collections.defaultdict, if its default_factory is set
695 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000696
697- Fixed a minor memory leak in dictobject.c. The content of the free
698 list was not freed on interpreter shutdown.
699
Georg Brandl52b92cc2008-05-25 09:43:03 +0000700- Limit free list of method and builtin function objects to 256
701 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000702
Georg Brandl52b92cc2008-05-25 09:43:03 +0000703- Patch #1953: Added ``sys._compact_freelists()`` and the C API
704 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000705 to compact the internal free lists of pre-allocted ints and floats.
706
707- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000708 Python expected the return type int but the fork familie returns
709 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000710
Georg Brandl52b92cc2008-05-25 09:43:03 +0000711- Issue #1678380: Fix a bug that identifies 0j and -0j when they
712 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000713
Georg Brandl52b92cc2008-05-25 09:43:03 +0000714- Issue #2025: Added tuple.count() and tuple.index() methods to comply
715 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000716
Georg Brandl52b92cc2008-05-25 09:43:03 +0000717- Fixed multiple reinitialization of the Python interpreter. The small
718 int list in longobject.c has caused a seg fault during the third
719 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000720
Georg Brandl52b92cc2008-05-25 09:43:03 +0000721- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000722
Georg Brandl52b92cc2008-05-25 09:43:03 +0000723- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000724
Georg Brandl52b92cc2008-05-25 09:43:03 +0000725- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000726
Georg Brandl52b92cc2008-05-25 09:43:03 +0000727- map() no longer accepts None for the first argument. Use zip()
728 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000729
Facundo Batista2336bdd2008-01-19 19:12:01 +0000730- Issue #1769: Now int("- 1") is not allowed any more.
731
Georg Brandl52b92cc2008-05-25 09:43:03 +0000732- Object/longobject.c: long(float('nan')) raises an OverflowError
733 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000734
Georg Brandl52b92cc2008-05-25 09:43:03 +0000735- Issue #1762972: __file__ points to the source file instead of the
736 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000737
Guido van Rossumab078dd2008-01-06 00:09:11 +0000738- Issue #1393: object_richcompare() returns NotImplemented instead of
739 False if the objects aren't equal, to give the other side a chance.
740
Guido van Rossume239b002008-01-06 00:44:20 +0000741- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000742
Georg Brandl52b92cc2008-05-25 09:43:03 +0000743- Improve some exception messages when Windows fails to load an
744 extension module. Now we get for example '%1 is not a valid Win32
745 application' instead of 'error code 193'. Also use Unicode strings
746 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000747
Georg Brandl52b92cc2008-05-25 09:43:03 +0000748- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
749 Python C API has gained a new type *PyInstanceMethod_Type* and the
750 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
751 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000752
Georg Brandl52b92cc2008-05-25 09:43:03 +0000753- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
754 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
755 are now enough to print the corresponding list of objects considered
756 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000757
Georg Brandl52b92cc2008-05-25 09:43:03 +0000758- Issue #1573: Improper use of the keyword-only syntax makes the
759 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000760
Georg Brandl52b92cc2008-05-25 09:43:03 +0000761- Issue #1564: The set implementation should special-case PyUnicode
762 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000763
Guido van Rossumea6775b2008-02-21 20:16:31 +0000764- Patch #1031213: Decode source line in SyntaxErrors back to its
765 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000766
Christian Heimes09aaa882008-02-23 15:01:06 +0000767- inspect.getsource() includes the decorators again.
768
Guido van Rossumea6775b2008-02-21 20:16:31 +0000769- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
770 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000771
Georg Brandl52b92cc2008-05-25 09:43:03 +0000772- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
773 the first chunk fed to the decoder started with a BOM, but was
774 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000775
Christian Heimesbc873412007-12-08 22:11:32 +0000776Extension Modules
777-----------------
778
Georg Brandl52b92cc2008-05-25 09:43:03 +0000779- Code for itertools ifilter(), imap(), and izip() moved to bultins
780 and renamed to filter(), map(), and zip(). Also, renamed
781 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000782
Georg Brandl52b92cc2008-05-25 09:43:03 +0000783- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000784
Georg Brandl52b92cc2008-05-25 09:43:03 +0000785- Bug #2111: mmap segfaults when trying to write a block opened with
786 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000787
Georg Brandl52b92cc2008-05-25 09:43:03 +0000788- Issue #2063: correct order of utime and stime in os.times() result
789 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000790
Christian Heimesbc873412007-12-08 22:11:32 +0000791Library
792-------
793
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000794- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000795
Georg Brandl52b92cc2008-05-25 09:43:03 +0000796- Created new UserDict class in collections module. This one inherits
797 from and complies with the MutableMapping ABC. Also, moved
798 UserString and UserList to the collections module. The
799 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000800
Guido van Rossumea6775b2008-02-21 20:16:31 +0000801- Removed UserDict.DictMixin. Replaced all its uses with
802 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000803
Guido van Rossume239b002008-01-06 00:44:20 +0000804- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000805
Guido van Rossume239b002008-01-06 00:44:20 +0000806- Issue #1585: IDLE uses non-existent xrange() function.
807
808- Issue #1578: Problems in win_getpass.
809
Georg Brandl52d168a2008-01-07 18:10:24 +0000810Build
811-----
812
Georg Brandl52b92cc2008-05-25 09:43:03 +0000813- Renamed --enable-unicode configure flag to --with-wide-unicode,
814 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000815
Guido van Rossume239b002008-01-06 00:44:20 +0000816C API
817-----
818
819- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
820 Py_TYPE and Py_REFCNT.
821
Georg Brandl52b92cc2008-05-25 09:43:03 +0000822- New API PyImport_ImportModuleNoBlock(), works like
823 PyImport_ImportModule() but won't block on the import lock
824 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000825
Christian Heimesbc873412007-12-08 22:11:32 +0000826
Fred Drake0e474a82007-10-11 18:01:43 +0000827What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000828===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000829
Guido van Rossum99533a92007-12-06 05:07:41 +0000830*Release date: 07-Dec-2007*
831
832(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000833
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000834Core and Builtins
835-----------------
836
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000837- str8 now has the same construction signature as bytes.
838
Georg Brandl52b92cc2008-05-25 09:43:03 +0000839- Comparisons between str and str8 now return False/True for ==/!=.
840 sqlite3 returns str8 when recreating on object from it's __conform__
841 value. The struct module returns str8 for all string-related
842 formats. This was true before this change, but becomes more
843 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000844
Georg Brandl52b92cc2008-05-25 09:43:03 +0000845- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
846 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000847
848- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
849
850- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000851 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000852 `PyUnicode_DecodeFSDefault(char*)` was added.
853
Georg Brandl52b92cc2008-05-25 09:43:03 +0000854- io.open() and _fileio.FileIO have grown a new argument closefd. A
855 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000856
Georg Brandl52b92cc2008-05-25 09:43:03 +0000857- Added a new option -b to issues warnings (-bb for errors) about
858 certain operations between bytes/buffer and str like str(b'') and
859 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000860
Georg Brandl52b92cc2008-05-25 09:43:03 +0000861- The standards streams sys.stdin, stdout and stderr may be None when
862 the when the C runtime library returns an invalid file descriptor
863 for the streams (fileno(stdin) < 0). For now this happens only for
864 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000865
Christian Heimesbce52be2007-11-17 19:08:41 +0000866- Added PCbuild9 directory for VS 2008.
867
Georg Brandl52b92cc2008-05-25 09:43:03 +0000868- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
869 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000870
Georg Brandl52b92cc2008-05-25 09:43:03 +0000871- Unbound methods are gone for good. ClassObject.method returns an
872 ordinary function object, instance.method still returns a bound
873 method object. The API of bound methods is cleaned up, too. The
874 im_class attribute is removed and im_func + im_self are renamed to
875 __func__ and __self__. The factory PyMethod_New takes only func and
876 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000877
Georg Brandl52b92cc2008-05-25 09:43:03 +0000878- intobject.h is no longer included by Python.h. The remains were
879 moved to longobject.h. It still exists to define several aliases
880 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000881
Christian Heimesa37d4c62007-12-04 23:02:19 +0000882- Removed sys.maxint, use sys.maxsize instead.
883
Fred Drake0e474a82007-10-11 18:01:43 +0000884Extension Modules
885-----------------
886
887- The `hotshot` profiler has been removed; use `cProfile` instead.
888
Brett Cannone9fd2312007-10-12 19:18:19 +0000889Library
890-------
891
Georg Brandl52b92cc2008-05-25 09:43:03 +0000892- When loading an external file using testfile(), the passed-in
893 encoding argument was being ignored if __loader__ is defined and
894 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000895
Georg Brandl52b92cc2008-05-25 09:43:03 +0000896- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
897 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000898
Christian Heimesc9543e42007-11-28 08:28:28 +0000899- Removed the 'new' module.
900
Georg Brandl52b92cc2008-05-25 09:43:03 +0000901- Removed all types from the 'types' module that are easily accessable
902 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000903
Georg Brandl52d168a2008-01-07 18:10:24 +0000904
Guido van Rossum4405cf32007-08-30 17:16:55 +0000905What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000906==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000907
Guido van Rossum4405cf32007-08-30 17:16:55 +0000908*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000909
910Core and Builtins
911-----------------
912
Martin v. Löwis47383402007-08-15 07:32:56 +0000913- PEP 3131: Support non-ASCII identifiers.
914
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000915- PEP 3120: Change default encoding to UTF-8.
916
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000917- PEP 3123: Use proper C inheritance for PyObject.
918
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000919- Removed the __oct__ and __hex__ special methods and added a bin()
920 builtin function.
921
Georg Brandl52b92cc2008-05-25 09:43:03 +0000922- PEP 3127: octal literals now start with "0o". Old-style octal
923 literals are invalid. There are binary literals with a prefix of
924 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000925
Guido van Rossume7ba4952007-06-06 23:52:48 +0000926- None, True, False are now keywords.
927
Guido van Rossum29478ef2007-05-29 00:39:44 +0000928- PEP 3119: isinstance() and issubclass() can be overridden.
929
Guido van Rossumebe3e162007-05-17 18:20:34 +0000930- Remove BaseException.message.
931
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000932- Remove tuple parameter unpacking (PEP 3113).
933
Georg Brandl52b92cc2008-05-25 09:43:03 +0000934- Remove the f_restricted attribute from frames. This naturally leads
935 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000936
Georg Brandl52b92cc2008-05-25 09:43:03 +0000937- PEP 3132 was accepted. That means that you can do ``a, *b =
938 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000939
Georg Brandl52b92cc2008-05-25 09:43:03 +0000940- range() now returns an iterator rather than a list. Floats are not
941 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000942
Nick Coghlan650f0d02007-04-15 12:05:43 +0000943- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000944 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000945
Guido van Rossume27dc722007-03-27 22:37:34 +0000946- By default, != returns the opposite of ==, unless the latter returns
947 NotImplemented.
948
Georg Brandl52b92cc2008-05-25 09:43:03 +0000949- Patch #1680961: sys.exitfunc has been removed and replaced with a
950 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000951
Georg Brandl801dd732007-03-18 20:18:31 +0000952- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000953 keyword arg in the class statement, which can now use the full
954 syntax of a parameter list. Also, the metaclass can implement a
955 __prepare__ function which will be called to create the dictionary
956 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000957
Georg Brandl428f0642007-03-18 18:35:15 +0000958- The long-deprecated argument "pend" of PyFloat_FromString() has been
959 removed.
960
Georg Brandle32b4222007-03-10 22:13:27 +0000961- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000962 its argument, if it exists. If not, it will work like before. This
963 allows customizing the output of dir() in the presence of a
964 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000965
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000966- Removed support for __members__ and __methods__.
967
Georg Brandle32b4222007-03-10 22:13:27 +0000968- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000969
Georg Brandle32b4222007-03-10 22:13:27 +0000970- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000971 functionality formerly known as raw_input(); the name raw_input() is
972 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000973
Georg Brandl52b92cc2008-05-25 09:43:03 +0000974- Classes listed in an 'except' clause must inherit from
975 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000976
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000977- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000978 and .keys(), .items(), .values() return dict views, which behave
979 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000980
Guido van Rossum8b545362007-02-09 23:52:14 +0000981- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000982 'softspace' attribute of files is now gone (since print() doesn't
983 use it). A side effect of this change is that you can get
984 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000985
986 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000987 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000988
989 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000990
Brett Cannon398db8b2007-01-29 23:44:37 +0000991- PEP 3102: keyword-only arguments.
992
Georg Brandl52b92cc2008-05-25 09:43:03 +0000993- Int/Long unification is complete. The 'long' built-in type and
994 literals with trailing 'L' or 'l' have been removed. Performance
995 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000996
997- 'except E, V' must now be spelled as 'except E as V' and deletes V
998 at the end of the except clause; V must be a simple name.
999
Neal Norwitzc1505362006-12-28 06:47:50 +00001000- Added function annotations per PEP 3107.
1001
Georg Brandl52b92cc2008-05-25 09:43:03 +00001002- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +00001003
1004 >>> def f(x):
1005 ... def inc():
1006 ... nonlocal x
1007 ... x += 1
1008 ... return x
1009 ... return inc
1010 ...
1011 >>> inc = f(0)
1012 >>> inc()
1013 1
1014 >>> inc()
1015 2
1016
Georg Brandl66a796e2006-12-19 20:50:34 +00001017- Moved intern() to sys.intern().
1018
1019- exec is now a function.
1020
1021- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +00001022
Neal Norwitz4886cc32006-08-21 17:06:07 +00001023- Classic classes are a thing of the past. All classes are new style.
1024
1025- Exceptions *must* derive from BaseException.
1026
1027- Integer division always returns a float. The -Q option is no more.
1028 All the following are gone:
1029 * PyNumber_Divide and PyNumber_InPlaceDivide
1030 * __div__, __rdiv__, and __idiv__
1031 * nb_divide, nb_inplace_divide
1032 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
1033 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
1034 if we want to re-use __div__ and friends. If we do, it will make
1035 it harder to write code for both 2.x and 3.x.)
1036
1037- 'as' and 'with' are keywords.
1038
1039- Absolute import is the default behavior for 'import foo' etc.
1040
Georg Brandl52b92cc2008-05-25 09:43:03 +00001041- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001042
Georg Brandl52b92cc2008-05-25 09:43:03 +00001043- Removed these Python builtins: apply(), callable(), coerce(),
1044 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +00001045
Georg Brandl52b92cc2008-05-25 09:43:03 +00001046- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001047
Georg Brandl52b92cc2008-05-25 09:43:03 +00001048- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001049
1050- Remove C API support for restricted execution.
1051
Guido van Rossumcf1be882007-08-30 22:07:17 +00001052- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +00001053 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +00001054 sequences of unequal length -- it now stops after the shortest one
1055 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001056
Georg Brandl52b92cc2008-05-25 09:43:03 +00001057- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001058
1059- Added class decorators per PEP 3129.
1060
1061
1062Extension Modules
1063-----------------
1064
Georg Brandl52b92cc2008-05-25 09:43:03 +00001065- Removed the imageop module. Obsolete long with its unit tests
1066 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001067
Georg Brandl52b92cc2008-05-25 09:43:03 +00001068- Removed these attributes from the operator module: div, idiv,
1069 __div__, __idiv__, isCallable, sequenceIncludes.
1070
1071- Removed these attributes from the sys module: exc_clear(), exc_type,
1072 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001073
1074
1075Library
1076-------
1077
Georg Brandl52b92cc2008-05-25 09:43:03 +00001078- Removed the compiler package. Use of the _ast module and (an
1079 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001080
Georg Brandl52b92cc2008-05-25 09:43:03 +00001081- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
1082 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
1083 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001084
Georg Brandl52b92cc2008-05-25 09:43:03 +00001085- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001086
Georg Brandl52b92cc2008-05-25 09:43:03 +00001087- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1088 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1089 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001090
Georg Brandl52b92cc2008-05-25 09:43:03 +00001091- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001092
Georg Brandl52b92cc2008-05-25 09:43:03 +00001093- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001094 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001095
Georg Brandl52b92cc2008-05-25 09:43:03 +00001096- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001097
Georg Brandl52b92cc2008-05-25 09:43:03 +00001098- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001099
1100- Patch #1680961: atexit has been reimplemented in C.
1101
Walter Dörwald41980ca2007-08-16 21:55:45 +00001102- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1103
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001104Build
1105-----
1106
1107C API
1108-----
1109
Georg Brandl52b92cc2008-05-25 09:43:03 +00001110- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001111
Georg Brandl52b92cc2008-05-25 09:43:03 +00001112- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1113 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001114
Georg Brandl52b92cc2008-05-25 09:43:03 +00001115- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001116
Georg Brandl52b92cc2008-05-25 09:43:03 +00001117- Removed these macros: staticforward, statichere, PyArg_GetInt,
1118 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001119
Georg Brandl52b92cc2008-05-25 09:43:03 +00001120- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1121 intintobjargproc, getreadbufferproc, getwritebufferproc,
1122 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001123
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001124Tests
1125-----
1126
Brett Cannone7a30f72008-03-03 03:36:27 +00001127- Removed test.testall as test.regrtest replaces it.
1128
Brett Cannonced04e02005-02-13 22:53:22 +00001129Documentation
1130-------------
1131
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001132Mac
1133---
1134
Georg Brandl52b92cc2008-05-25 09:43:03 +00001135- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001136
Guido van Rossum845702c2007-08-30 18:44:53 +00001137Platforms
1138---------
1139
1140- Support for BeOS and AtheOS was removed (according to PEP 11).
1141
1142- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1143
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001144Tools/Demos
1145-----------
1146
Georg Brandl52b92cc2008-05-25 09:43:03 +00001147
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001148**(For information about older versions, consult the HISTORY file.)**