blob: 889cead8a693f7c00b5203ab5e6808768302c939 [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'Arc1b933ed2008-09-04 22:34:09 +000015- Issue 3774: Added a few more checks in PyTokenizer_FindEncoding to handle
16 error conditions.
17
Brett Cannon8a9583e2008-09-04 05:04:25 +000018- Issue 3594: Fix Parser/tokenizer.c:fp_setreadl() to open the file being
19 tokenized by either a file path or file pointer for the benefit of
20 PyTokenizer_FindEncoding().
21
Antoine Pitroufff95302008-09-03 18:58:51 +000022- Issue #3696: Error parsing arguments on OpenBSD <= 4.4 and Cygwin. On
23 these systems, the mbstowcs() function is slightly buggy and must be
24 replaced with strlen() for the purpose of counting of number of wide
25 characters needed to represent the multi-byte character string.
26
Antoine Pitrou658fad82008-09-03 18:34:34 +000027- Issue #3697: "Fatal Python error: Cannot recover from stack overflow"
28 could be easily encountered under Windows in debug mode when exercising
29 the recursion limit checking code, due to bogus handling of recursion
30 limit when USE_STACKCHEK was enabled.
31
Brett Cannon54bd41d2008-09-02 04:01:42 +000032- Issue 3639: The _warnings module could segfault the interpreter when
33 unexpected types were passed in as arguments.
34
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +000035- Issue #3712: The memoryview object had a reference leak and didn't support
36 cyclic garbage collection.
37
Antoine Pitrouf71995782008-08-29 18:37:05 +000038- Issue #3668: Fix a memory leak with the "s*" argument parser in
39 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
40 was correctly parsed but parsing of subsequent arguments failed.
41
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +000042- Issue #3611: An exception __context__ could be cleared in a complex pattern
43 involving a __del__ method re-raising an exception.
44
Antoine Pitrouec569b72008-08-26 22:40:48 +000045- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
46 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
47 mechanism. In the process, fix a bug where isinstance() and issubclass(),
48 when given a tuple of classes as second argument, were looking up
49 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
50 type object.
51
Antoine Pitroue2dffc02008-08-26 22:02:58 +000052- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
53
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +000054- Issue #3651: Fix various memory leaks when using the buffer
55 interface, or when the "s#" code of PyArg_ParseTuple is given a
56 bytes object.
57
Neal Norwitz6ae2eb22008-08-24 23:50:08 +000058- Issue #3657: Fix uninitialized memory read when pickling longs.
59 Found by valgrind.
60
Neal Norwitz3ce5d922008-08-24 07:08:55 +000061- Apply security patches from Apple.
62
Neal Norwitz2f99b242008-08-24 05:48:10 +000063- Fix crashes on memory allocation failure found with failmalloc.
64
65- Fix memory leaks found with valgrind and update suppressions file.
66
67- Fix compiler warnings in opt mode which would lead to invalid memory reads.
68
69- Fix problem using wrong name in decimal module reported by pychecker.
70
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000071- Issue #3650: Fixed a reference leak in bytes.split('x').
72
Benjamin Petersonc15a0732008-08-26 16:46:47 +000073- bytes(o) now tries to use o.__bytes__() before using fallbacks.
74
75C API
76-----
77
78- PyObject_Bytes and PyBytes_FromObject were added.
79
Barry Warsaw8509df72008-08-21 03:02:47 +000080Library
81-------
82
Antoine Pitrou1d6a16b2008-09-04 21:32:09 +000083- Issue #3160: the "bdist_wininst" distutils command didn't work.
84
Guilherme Polob212b752008-09-04 11:21:31 +000085- Issue #1658: tkinter changes dict size during iteration in both
86 tkinter.BaseWidget and tkinter.scrolledtext.ScrolledText.
87
Benjamin Peterson6ba23322008-09-03 22:59:38 +000088- The bsddb module (and therefore the dbm.bsd module) has been removed.
Gregory P. Smith451e99b2008-09-04 04:46:48 +000089 It is now maintained outside of the standard library at
90 http://www.jcea.es/programacion/pybsddb.htm.
Benjamin Peterson6ba23322008-09-03 22:59:38 +000091
Facundo Batistac469d4c2008-09-03 22:49:01 +000092- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
93 to the urlparse one. Added a DeprecationWarning in the old module, it
94 will be deprecated in the future.
95
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +000096- Issue #3719: platform.architecture() fails if there are spaces in the
97 path to the Python binary.
98
Brett Cannonec92e182008-09-02 02:46:59 +000099- Issue 3602: As part of the merge of r66135, make the parameters on
100 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
101
Benjamin Petersonb3085c92008-09-01 23:09:31 +0000102- The deprecation warnings for the camelCase threading API names were removed.
103
Jesse Noller338f5782008-09-03 18:22:19 +0000104- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
105 SEM_VALUE_MAX.
106
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000107Extension Modules
108-----------------
109
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +0000110- Issue #2975: When compiling several extension modules with Visual Studio 2008
111 from the same python interpreter, some environment variables would grow
112 without limit.
113
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000114- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
115 exploitation of poor argument checking.
116
Jesus Cea6ba33292008-08-31 14:12:11 +0000117- bsddb code updated to version 4.7.3pre2. This code is the same than
118 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
119 The Python code is automatically translated using "2to3". Please, do not
120 update this code in Python 3.0 by hand. Update the 2.6 one and then
121 do "2to3".
122
Neal Norwitz8f2f22a2008-08-24 20:59:23 +0000123Tools/Demos
124-----------
125
126- Fix Misc/gdbinit so it works.
127
Barry Warsaw8509df72008-08-21 03:02:47 +0000128
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000129What's new in Python 3.0b3?
130===========================
131
Barry Warsaw57c10582008-08-21 02:39:51 +0000132*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000133
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000134Core and Builtins
135-----------------
136
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000137- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
138 arguments.
139
Antoine Pitrou616d2852008-08-19 22:09:34 +0000140- Issue #2394: implement more of the memoryview API, with the caveat that
141 only one-dimensional contiguous buffers are supported and exercised right
142 now. Slicing, slice assignment and comparison (equality and inequality)
143 have been added. Also, the tolist() method has been implemented, but only
144 for byte buffers. Endly, the API has been updated to return bytes objects
145 wherever it used to return bytearrays.
146
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000147- Issue #3560: clean up the new C PyMemoryView API so that naming is
148 internally consistent; add macros PyMemoryView_GET_BASE() and
149 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
150 without relying on a particular implementation; remove the ill-named
151 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
152
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000153- ctypes function pointers that are COM methods have a boolean True
154 value again.
155
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000156- Issue #1819: function calls with several named parameters are now on
157 average 35% faster (as measured by pybench).
158
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000159- The undocumented C APIs PyUnicode_AsString() and
160 PyUnicode_AsStringAndSize() were made private to the interpreter, in
161 order to be able to refine their interfaces for Python 3.1.
162
163 If you need to access the UTF-8 representation of a Unicode object
164 as bytes string, please use PyUnicode_AsUTF8String() instead.
165
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000166- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
167 to Python 3.0's stricter semantics which allow to avoid successive
168 reallocations of the result string (this also affects str.join()).
169
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000170
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000171Library
172-------
173
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000174- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
175 a build problem on MacOS with CJK locales. It adds four temporary
176 mappings to existing legacy codecs that are virtually compatible
177 with Mac encodings. They will be replaced by codecs correctly
178 implemented in 3.1.
179
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000180- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
181 "global name 'header' is not defined".
182
Antoine Pitroufd036452008-08-19 17:56:33 +0000183- Issue #2834: update the regular expression library to match the unicode
184 standards of py3k. In other words, mixing bytes and unicode strings
185 (be it as pattern, search string or replacement string) raises a TypeError.
186 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
187 and can be disabled by specifying a new re.ASCII flag; as for bytes
188 patterns, ASCII matching is the only option and trying to specify re.UNICODE
189 for such patterns raises a ValueError.
190
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000191- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
192 Code contributed by Matt Giuca. quote() now encodes the input
193 before quoting, unquote() decodes after unquoting. There are
194 new arguments to change the encoding and errors settings.
195 There are also new APIs to skip the encode/decode steps.
196 [un]quote_plus() are also affected.
197
Nick Coghlan36f49522008-08-18 12:31:52 +0000198- Issue #2235: numbers.Number now blocks inheritance of the default id()
199 based hash because that hash mechanism is not correct for numeric types.
200 All concrete numeric types that inherit from Number (rather than just
201 registering with it) must explicitly provide a hash implementation in
202 order for their instances to be hashable.
203
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000204- Issue #2676: in the email package, content-type parsing was hanging on
205 pathological input because of quadratic or exponential behaviour of a
206 regular expression.
207
Antoine Pitrou87695762008-08-14 22:44:29 +0000208- Issue #3476: binary buffered reading through the new "io" library is now
209 thread-safe.
210
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000211- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
212 menu entries were not deleted.
213
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000214- Remove the TarFileCompat class from tarfile.py.
215
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000216- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
217 accepts the same parameters. It just checks that its first argument is an
218 integer.
219
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000220- Issue #3394: zipfile.writestr sets external attributes when passed a
221 file name rather than a ZipInfo instance, so files are extracted with
222 mode 0600 rather than 000 under Unix.
223
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000224- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
225 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000226
Martin v. Löwis371bb502008-08-16 13:02:57 +0000227Extension Modules
228-----------------
229
230- Bug #3542: Support Unicode strings in _msi module.
231
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000232What's new in Python 3.0b2?
233===========================
234
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000235*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000236
237Core and Builtins
238-----------------
239
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000240- Issue #3008: the float type has a new instance method 'float.hex'
241 and a new class method 'float.fromhex' to convert floating-point
242 numbers to and from hexadecimal strings, respectively.
243
Eric Smithd68af8f2008-07-16 00:15:35 +0000244- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
245 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
246
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000247- Issue #3280: like chr(), the "%c" format now accepts unicode code points
248 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
249 "narrow Unicode" builds, the result is a string of 2 code units, forming a
250 UTF-16 surrogate pair.
251
Georg Brandld52429f2008-07-04 15:55:02 +0000252- Issue #3282: str.isprintable() should return False for undefined
253 Unicode characters.
254
Martin v. Löwis029656f2008-06-30 04:06:08 +0000255- Issue #3236: Return small longs from PyLong_FromString.
256
Benjamin Petersone6528212008-07-15 15:32:09 +0000257- Exception tracebacks now support exception chaining.
258
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000259Library
260-------
261
Brett Cannonc2542e92008-07-25 18:19:20 +0000262- Removed the sunaudio module. Use sunau instead.
263
Thomas Heller47bc8092008-08-19 06:38:12 +0000264- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
265 api functions without holding the GIL, which could lead to a fatal
266 error when they failed.
267
268- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
269
Georg Brandl30704ea02008-07-23 15:07:12 +0000270- Removed "ast" function aliases from the parser module.
271
Thomas Heller15383a02008-07-15 19:46:52 +0000272- Issue #3313: Fixed a crash when a failed dlopen() call does not set
273 a valid dlerror() message.
274
Thomas Heller0261e1e2008-07-15 17:25:07 +0000275- Issue #3258: Fixed a crash when a ctypes POINTER type to an
276 incomplete structure was created.
277
Georg Brandl1abcbf82008-07-01 19:28:43 +0000278- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
279 argument now must be a bytes object in any case.
280
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000281- Issue #3145: help("modules whatever") failed when trying to load the source
282 code of every single module of the standard library, including invalid files
283 used in the test suite.
284
Georg Brandlbded4d32008-07-17 18:15:35 +0000285- The gettext library now consistently uses Unicode strings for message ids
286 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000287
Benjamin Petersone6528212008-07-15 15:32:09 +0000288- The traceback module has been expanded to handle chained exceptions.
289
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000290C API
291-----
292
293- Issue #3247: the function Py_FindMethod was removed. Modern types should
294 use the tp_methods slot instead.
295
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000296Tools/Demos
297-----------
298
Georg Brandl336341f2008-07-01 20:21:28 +0000299- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000300
Georg Brandl336341f2008-07-01 20:21:28 +0000301- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000302
303
Brett Cannon0d71ee72008-05-08 18:13:40 +0000304What's new in Python 3.0b1?
305===========================
306
Barry Warsawc1e689e2008-06-19 00:35:43 +0000307*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000308
309Core and Builtins
310-----------------
311
Brett Cannondb734912008-06-27 00:52:15 +0000312- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
313 argument being anything other than a dict or None. Also fixed a bug in error
314 handling when 'message' and 'category' were both set to None, triggering a
315 bus error.
316
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000317- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
318 holds the last (strong) reference to its referent.
319
Georg Brandl559e5d72008-06-11 18:37:52 +0000320- Issue #2630: implement PEP 3138. repr() now returns printable
321 Unicode characters unescaped, to get an ASCII-only representation
322 of an object use ascii().
323
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000324- Issue #1342: On windows, Python could not start when installed in a
325 directory with non-ascii characters.
326
Martin v. Löwis1a214512008-06-11 05:26:20 +0000327- Implement PEP 3121: new module initialization and finalization API.
328
Georg Brandle1b5ac62008-06-04 13:06:58 +0000329- Removed the already-defunct ``-t`` option.
330
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000331- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
332 unmarshalling many code objects, which happens when importing a
333 large .pyc file (~1000 functions).
334
Georg Brandl52b92cc2008-05-25 09:43:03 +0000335- Issue #2963: fix merging oversight that disabled method cache for
336 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000337
Georg Brandlc9b09532008-05-25 09:24:38 +0000338- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
339
Georg Brandl52b92cc2008-05-25 09:43:03 +0000340- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000341
Georg Brandl52b92cc2008-05-25 09:43:03 +0000342- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
343 code now allows any unicode string and returns a utf-8 encoded
344 buffer, just like the "s#" code already does. The "z" code was
345 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000346
Georg Brandl52b92cc2008-05-25 09:43:03 +0000347- Issue #2863: generators now have a ``gen.__name__`` attribute that
348 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
349 ``func.func_code.co_name``. The repr() of a generator now also
350 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000351
352- Issue #2831: enumerate() now has a ``start`` argument.
353
Georg Brandl52b92cc2008-05-25 09:43:03 +0000354- Issue #2801: fix bug in the float.is_integer method where a
355 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000356
Georg Brandl52b92cc2008-05-25 09:43:03 +0000357- The ``--with-toolbox-glue`` option (and the associated
358 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000359
Georg Brandl52b92cc2008-05-25 09:43:03 +0000360- Issue #2196: hasattr() now lets exceptions which do not inherit
361 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
362 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000363
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000364- #3021 Exception reraising sematics have been significantly improved. However,
365 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
366 code anymore.
367
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000368- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
369 removed.
370
Brett Cannon0d71ee72008-05-08 18:13:40 +0000371Extension Modules
372-----------------
373
Georg Brandl38feaf02008-05-25 07:45:51 +0000374- Renamed ``_winreg`` module to ``winreg``.
375
Georg Brandl52b92cc2008-05-25 09:43:03 +0000376- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
377 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000378
379- Support for Windows 9x has been removed from the winsound module.
380
Georg Brandl52b92cc2008-05-25 09:43:03 +0000381- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000382
Brett Cannon0d71ee72008-05-08 18:13:40 +0000383Library
384-------
385
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000386- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
387 symtable.Symbol have been removed.
388
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000389- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
390
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000391- a new ``urllib`` package was created. It consists of code from
392 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
393 modules have all been removed. The new package has five submodules:
394 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
395 ``urllib.error``, and ``urllib.robotparser``. The
396 ``urllib.request.urlopen()`` function uses the url opener from
397 ``urllib2``. (Note that the unittests have not been renamed for the
398 beta, but they will be renamed in the future.)
399
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000400- rfc822 has been removed in favor of the email package.
401
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000402- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000403
Barry Warsawf5019422008-06-12 02:42:00 +0000404- Patch #2849: Remove use of rfc822 module from standard library.
405
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000406- Added C optimized implementation of io.StringIO.
407
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000408- The ``pickle`` module is now automatically use an optimized C
409 implementation of Pickler and Unpickler when available. The
410 ``cPickle`` module is no longer needed.
411
Georg Brandl877b10a2008-06-01 21:25:55 +0000412- Removed the ``htmllib`` and ``sgmllib`` modules.
413
Georg Brandl61013952008-05-28 15:56:30 +0000414- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
415 been removed from ``http.cookies``.
416
Brett Cannona23810f2008-05-26 19:04:21 +0000417- The ``commands`` module has been removed. Its getoutput() and
418 getstatusoutput() functions have been moved to the ``subprocess`` module.
419
Georg Brandl3d5c4252008-05-26 18:03:26 +0000420- The ``http`` package was created; it contains the old ``httplib``
421 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
422 as ``http.cookiejar``, and the content of the three ``HTTPServer``
423 modules as ``http.server``.
424
Georg Brandl38eceaa2008-05-26 11:14:17 +0000425- The ``xmlrpc`` package was created; it contains the old
426 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
427 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000428 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000429
430- The ``dbm`` package was created, containing the old modules
431 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
432 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
433 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
434 as submodules.
435
Georg Brandl52b92cc2008-05-25 09:43:03 +0000436- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000437
Georg Brandl52b92cc2008-05-25 09:43:03 +0000438- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000439
Georg Brandl52b92cc2008-05-25 09:43:03 +0000440- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000441
Georg Brandl52b92cc2008-05-25 09:43:03 +0000442- Issue #2250: Exceptions raised during evaluation of names in
443 rlcompleter's ``Completer.complete()`` method are now caught and
444 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000445
Georg Brandl52b92cc2008-05-25 09:43:03 +0000446- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
447 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000448
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000449- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
450 large to fit in a C long. ldexp(x, n) now returns a zero (with
451 suitable sign) if n is large and negative; previously, it raised
452 OverflowError.
453
Georg Brandl52b92cc2008-05-25 09:43:03 +0000454- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000455
Georg Brandl52b92cc2008-05-25 09:43:03 +0000456- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000457
Georg Brandl52b92cc2008-05-25 09:43:03 +0000458- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000459
Georg Brandl52b92cc2008-05-25 09:43:03 +0000460- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000461
Georg Brandl52b92cc2008-05-25 09:43:03 +0000462- Fixed the ``__all__`` setting on ``collections`` to include
463 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000464
Brett Cannoncf3520c2008-05-11 22:47:58 +0000465- The sre module has been removed.
466
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000467- The Queue module has been renamed to queue.
468
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000469- The copy_reg module has been renamed to copyreg.
470
Brett Cannond8b61ee2008-05-11 03:00:26 +0000471- The mhlib module has been removed.
472
Brett Cannonbd474422008-05-10 22:42:14 +0000473- The ihooks module has been removed.
474
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000475- The fpformat module has been removed.
476
Brett Cannonf4fd9932008-05-10 21:11:46 +0000477- The dircache module has been removed.
478
Brett Cannond175b4c2008-05-10 03:19:54 +0000479- The Canvas module has been removed.
480
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000481- The Decimal module gained the magic methods __round__, __ceil__,
482 __floor__ and __trunc__, to give support for round, math.ceil,
483 math.floor and math.trunc.
484
Brett Cannon900ee3a2008-05-08 20:31:11 +0000485- The user module has been removed.
486
Brett Cannon34afe872008-05-08 20:31:44 +0000487- The mutex module has been removed.
488
Brett Cannon0d71ee72008-05-08 18:13:40 +0000489- The imputil module has been removed.
490
Georg Brandl52b92cc2008-05-25 09:43:03 +0000491- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000492
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000493- pdb gained the "until" command.
494
Georg Brandl52b92cc2008-05-25 09:43:03 +0000495- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000496
Georg Brandl32de7af2008-08-18 23:07:41 +0000497- The threading module API was renamed to be PEP 8 compliant. The
498 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000499
Georg Brandl294d5a92008-06-01 19:25:32 +0000500Tools/Demos
501-----------
502
503- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000504
Brett Cannon0d71ee72008-05-08 18:13:40 +0000505Build
506-----
507
508
Barry Warsaw66079cd2008-04-04 01:36:36 +0000509What's New in Python 3.0a5?
510===========================
511
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000512*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000513
514Core and Builtins
515-----------------
516
Georg Brandl52b92cc2008-05-25 09:43:03 +0000517- Fixed misbehaviour of PyLong_FromSsize_t on systems where
518 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000519
Georg Brandl52b92cc2008-05-25 09:43:03 +0000520- Issue #2221: Corrected a SystemError "error return without exception
521 set", when the code executed by exec() raises an exception, and
522 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000523
Georg Brandl52b92cc2008-05-25 09:43:03 +0000524- Bug #2565: The repr() of type objects now calls them 'class', not
525 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000526
Martin v. Löwis790465f2008-04-05 20:41:37 +0000527- The command line processing was converted to pass Unicode strings
528 through as unmodified as possible; as a consequence, the C API
529 related to command line arguments was changed to use wchar_t.
530
Georg Brandl52b92cc2008-05-25 09:43:03 +0000531- All backslashes in raw strings are interpreted literally. This
532 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000533
Barry Warsaw66079cd2008-04-04 01:36:36 +0000534Extension Modules
535-----------------
536
537Library
538-------
539
Georg Brandl52b92cc2008-05-25 09:43:03 +0000540- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000541
Thomas Hellere106dc32008-04-24 18:39:36 +0000542- Issue #2682: ctypes callback functions now longer contain a cyclic
543 reference to themselves.
544
Georg Brandl52b92cc2008-05-25 09:43:03 +0000545- Issue #2058: Remove the buf attribute and add __slots__ to the
546 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000547
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000548- Bug #2606: Avoid calling .sort() on a dict_keys object.
549
Thomas Hellerbff533b2008-04-04 19:53:14 +0000550- The bundled libffi copy is now in sync with the recently released
551 libffi3.0.5 version, apart from some small changes to
552 Modules/_ctypes/libffi/configure.ac.
553
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000554Build
555-----
556
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000557- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
558
Guido van Rossumdc21db32008-04-07 18:37:41 +0000559- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000560 accidentally overwriting a Python 2.x installation. Use "make
561 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000562
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000563- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
564 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000565
Georg Brandl52b92cc2008-05-25 09:43:03 +0000566
Barry Warsawa9d499d2008-03-01 18:38:07 +0000567What's New in Python 3.0a4?
568===========================
569
Barry Warsawbb5cd082008-04-02 23:33:27 +0000570*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000571
Martin v. Löwis25931462008-03-17 20:43:42 +0000572Core and Builtins
573-----------------
574
575- Bug #2301: Don't try decoding the source code into the original
576 encoding for syntax errors.
577
Martin v. Löwis92fab752008-03-08 10:40:41 +0000578Extension Modules
579-----------------
580
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000581- The dl module was removed, use the ctypes module instead.
582
Martin v. Löwis92fab752008-03-08 10:40:41 +0000583- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000584
Martin v. Löwis071ef772008-03-08 11:24:24 +0000585Library
586-------
587
Georg Brandl52b92cc2008-05-25 09:43:03 +0000588- The class distutils.commands.build_py.build_py_2to3 can be used as a
589 build_py replacement to automatically run 2to3 on modules that are
590 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000591
Guido van Rossumf4169812008-03-17 22:56:06 +0000592- A new pickle protocol (protocol 3) is added with explicit support
593 for bytes. This is the default protocol. It intentionally cannot
594 be unpickled by Python 2.x.
595
596- When a pickle written by Python 2.x contains an (8-bit) str
597 instance, this is now decoded to a (Unicode) str instance. The
598 encoding used to do this defaults to ASCII, but can be overridden
599 via two new keyword arguments to the Unpickler class. Previously
600 this would create bytes instances, which is usually wrong: str
601 instances are often used to pickle attribute names etc., and text is
602 more common than binary data anyway.
603
Martin v. Löwis071ef772008-03-08 11:24:24 +0000604- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000605 system doesn't support CODESET and LANG isn't set or doesn't allow
606 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000607
Georg Brandl52b92cc2008-05-25 09:43:03 +0000608- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
609 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000610
Georg Brandl52b92cc2008-05-25 09:43:03 +0000611- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
612 has been renamed tokenize and now works with bytes rather than
613 strings. A new detect_encoding function has been added for
614 determining source file encoding according to PEP-0263. Token
615 sequences returned by tokenize always start with an ENCODING token
616 which specifies the encoding used to decode the file. This token is
617 used to encode the output of untokenize back to bytes.
618
Barry Warsawa9d499d2008-03-01 18:38:07 +0000619
Christian Heimesbc873412007-12-08 22:11:32 +0000620What's New in Python 3.0a3?
621===========================
622
Barry Warsaw659fc422008-03-01 17:45:23 +0000623*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000624
625Core and Builtins
626-----------------
627
Georg Brandl52b92cc2008-05-25 09:43:03 +0000628- Issue #2282: io.TextIOWrapper was not overriding seekable() from
629 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000630
Georg Brandl52b92cc2008-05-25 09:43:03 +0000631- Issue #2115: Important speedup in setting __slot__ attributes. Also
632 prevent a possible crash: an Abstract Base Class would try to access
633 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000634
Georg Brandl52b92cc2008-05-25 09:43:03 +0000635- Fixed repr() and str() of complex numbers with infinity or nan as
636 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000637
Georg Brandl52b92cc2008-05-25 09:43:03 +0000638- Clear all free list during a gc.collect() of the highest generation
639 in order to allow pymalloc to free more arenas. Python may give back
640 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000641
Georg Brandl52b92cc2008-05-25 09:43:03 +0000642- Issue #2045: Fix an infinite recursion triggered when printing a
643 subclass of collections.defaultdict, if its default_factory is set
644 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000645
646- Fixed a minor memory leak in dictobject.c. The content of the free
647 list was not freed on interpreter shutdown.
648
Georg Brandl52b92cc2008-05-25 09:43:03 +0000649- Limit free list of method and builtin function objects to 256
650 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000651
Georg Brandl52b92cc2008-05-25 09:43:03 +0000652- Patch #1953: Added ``sys._compact_freelists()`` and the C API
653 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000654 to compact the internal free lists of pre-allocted ints and floats.
655
656- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000657 Python expected the return type int but the fork familie returns
658 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000659
Georg Brandl52b92cc2008-05-25 09:43:03 +0000660- Issue #1678380: Fix a bug that identifies 0j and -0j when they
661 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000662
Georg Brandl52b92cc2008-05-25 09:43:03 +0000663- Issue #2025: Added tuple.count() and tuple.index() methods to comply
664 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000665
Georg Brandl52b92cc2008-05-25 09:43:03 +0000666- Fixed multiple reinitialization of the Python interpreter. The small
667 int list in longobject.c has caused a seg fault during the third
668 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000669
Georg Brandl52b92cc2008-05-25 09:43:03 +0000670- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000671
Georg Brandl52b92cc2008-05-25 09:43:03 +0000672- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000673
Georg Brandl52b92cc2008-05-25 09:43:03 +0000674- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000675
Georg Brandl52b92cc2008-05-25 09:43:03 +0000676- map() no longer accepts None for the first argument. Use zip()
677 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000678
Facundo Batista2336bdd2008-01-19 19:12:01 +0000679- Issue #1769: Now int("- 1") is not allowed any more.
680
Georg Brandl52b92cc2008-05-25 09:43:03 +0000681- Object/longobject.c: long(float('nan')) raises an OverflowError
682 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000683
Georg Brandl52b92cc2008-05-25 09:43:03 +0000684- Issue #1762972: __file__ points to the source file instead of the
685 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000686
Guido van Rossumab078dd2008-01-06 00:09:11 +0000687- Issue #1393: object_richcompare() returns NotImplemented instead of
688 False if the objects aren't equal, to give the other side a chance.
689
Guido van Rossume239b002008-01-06 00:44:20 +0000690- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000691
Georg Brandl52b92cc2008-05-25 09:43:03 +0000692- Improve some exception messages when Windows fails to load an
693 extension module. Now we get for example '%1 is not a valid Win32
694 application' instead of 'error code 193'. Also use Unicode strings
695 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000696
Georg Brandl52b92cc2008-05-25 09:43:03 +0000697- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
698 Python C API has gained a new type *PyInstanceMethod_Type* and the
699 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
700 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000701
Georg Brandl52b92cc2008-05-25 09:43:03 +0000702- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
703 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
704 are now enough to print the corresponding list of objects considered
705 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000706
Georg Brandl52b92cc2008-05-25 09:43:03 +0000707- Issue #1573: Improper use of the keyword-only syntax makes the
708 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000709
Georg Brandl52b92cc2008-05-25 09:43:03 +0000710- Issue #1564: The set implementation should special-case PyUnicode
711 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000712
Guido van Rossumea6775b2008-02-21 20:16:31 +0000713- Patch #1031213: Decode source line in SyntaxErrors back to its
714 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000715
Christian Heimes09aaa882008-02-23 15:01:06 +0000716- inspect.getsource() includes the decorators again.
717
Guido van Rossumea6775b2008-02-21 20:16:31 +0000718- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
719 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000720
Georg Brandl52b92cc2008-05-25 09:43:03 +0000721- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
722 the first chunk fed to the decoder started with a BOM, but was
723 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000724
Christian Heimesbc873412007-12-08 22:11:32 +0000725Extension Modules
726-----------------
727
Georg Brandl52b92cc2008-05-25 09:43:03 +0000728- Code for itertools ifilter(), imap(), and izip() moved to bultins
729 and renamed to filter(), map(), and zip(). Also, renamed
730 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000731
Georg Brandl52b92cc2008-05-25 09:43:03 +0000732- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000733
Georg Brandl52b92cc2008-05-25 09:43:03 +0000734- Bug #2111: mmap segfaults when trying to write a block opened with
735 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000736
Georg Brandl52b92cc2008-05-25 09:43:03 +0000737- Issue #2063: correct order of utime and stime in os.times() result
738 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000739
Christian Heimesbc873412007-12-08 22:11:32 +0000740Library
741-------
742
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000743- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000744
Georg Brandl52b92cc2008-05-25 09:43:03 +0000745- Created new UserDict class in collections module. This one inherits
746 from and complies with the MutableMapping ABC. Also, moved
747 UserString and UserList to the collections module. The
748 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000749
Guido van Rossumea6775b2008-02-21 20:16:31 +0000750- Removed UserDict.DictMixin. Replaced all its uses with
751 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000752
Guido van Rossume239b002008-01-06 00:44:20 +0000753- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000754
Guido van Rossume239b002008-01-06 00:44:20 +0000755- Issue #1585: IDLE uses non-existent xrange() function.
756
757- Issue #1578: Problems in win_getpass.
758
Georg Brandl52d168a2008-01-07 18:10:24 +0000759Build
760-----
761
Georg Brandl52b92cc2008-05-25 09:43:03 +0000762- Renamed --enable-unicode configure flag to --with-wide-unicode,
763 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000764
Guido van Rossume239b002008-01-06 00:44:20 +0000765C API
766-----
767
768- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
769 Py_TYPE and Py_REFCNT.
770
Georg Brandl52b92cc2008-05-25 09:43:03 +0000771- New API PyImport_ImportModuleNoBlock(), works like
772 PyImport_ImportModule() but won't block on the import lock
773 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000774
Christian Heimesbc873412007-12-08 22:11:32 +0000775
Fred Drake0e474a82007-10-11 18:01:43 +0000776What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000777===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000778
Guido van Rossum99533a92007-12-06 05:07:41 +0000779*Release date: 07-Dec-2007*
780
781(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000782
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000783Core and Builtins
784-----------------
785
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000786- str8 now has the same construction signature as bytes.
787
Georg Brandl52b92cc2008-05-25 09:43:03 +0000788- Comparisons between str and str8 now return False/True for ==/!=.
789 sqlite3 returns str8 when recreating on object from it's __conform__
790 value. The struct module returns str8 for all string-related
791 formats. This was true before this change, but becomes more
792 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000793
Georg Brandl52b92cc2008-05-25 09:43:03 +0000794- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
795 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000796
797- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
798
799- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000800 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000801 `PyUnicode_DecodeFSDefault(char*)` was added.
802
Georg Brandl52b92cc2008-05-25 09:43:03 +0000803- io.open() and _fileio.FileIO have grown a new argument closefd. A
804 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000805
Georg Brandl52b92cc2008-05-25 09:43:03 +0000806- Added a new option -b to issues warnings (-bb for errors) about
807 certain operations between bytes/buffer and str like str(b'') and
808 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000809
Georg Brandl52b92cc2008-05-25 09:43:03 +0000810- The standards streams sys.stdin, stdout and stderr may be None when
811 the when the C runtime library returns an invalid file descriptor
812 for the streams (fileno(stdin) < 0). For now this happens only for
813 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000814
Christian Heimesbce52be2007-11-17 19:08:41 +0000815- Added PCbuild9 directory for VS 2008.
816
Georg Brandl52b92cc2008-05-25 09:43:03 +0000817- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
818 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000819
Georg Brandl52b92cc2008-05-25 09:43:03 +0000820- Unbound methods are gone for good. ClassObject.method returns an
821 ordinary function object, instance.method still returns a bound
822 method object. The API of bound methods is cleaned up, too. The
823 im_class attribute is removed and im_func + im_self are renamed to
824 __func__ and __self__. The factory PyMethod_New takes only func and
825 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000826
Georg Brandl52b92cc2008-05-25 09:43:03 +0000827- intobject.h is no longer included by Python.h. The remains were
828 moved to longobject.h. It still exists to define several aliases
829 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000830
Christian Heimesa37d4c62007-12-04 23:02:19 +0000831- Removed sys.maxint, use sys.maxsize instead.
832
Fred Drake0e474a82007-10-11 18:01:43 +0000833Extension Modules
834-----------------
835
836- The `hotshot` profiler has been removed; use `cProfile` instead.
837
Brett Cannone9fd2312007-10-12 19:18:19 +0000838Library
839-------
840
Georg Brandl52b92cc2008-05-25 09:43:03 +0000841- When loading an external file using testfile(), the passed-in
842 encoding argument was being ignored if __loader__ is defined and
843 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000844
Georg Brandl52b92cc2008-05-25 09:43:03 +0000845- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
846 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000847
Christian Heimesc9543e42007-11-28 08:28:28 +0000848- Removed the 'new' module.
849
Georg Brandl52b92cc2008-05-25 09:43:03 +0000850- Removed all types from the 'types' module that are easily accessable
851 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000852
Georg Brandl52d168a2008-01-07 18:10:24 +0000853
Guido van Rossum4405cf32007-08-30 17:16:55 +0000854What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000855==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000856
Guido van Rossum4405cf32007-08-30 17:16:55 +0000857*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000858
859Core and Builtins
860-----------------
861
Martin v. Löwis47383402007-08-15 07:32:56 +0000862- PEP 3131: Support non-ASCII identifiers.
863
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000864- PEP 3120: Change default encoding to UTF-8.
865
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000866- PEP 3123: Use proper C inheritance for PyObject.
867
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000868- Removed the __oct__ and __hex__ special methods and added a bin()
869 builtin function.
870
Georg Brandl52b92cc2008-05-25 09:43:03 +0000871- PEP 3127: octal literals now start with "0o". Old-style octal
872 literals are invalid. There are binary literals with a prefix of
873 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000874
Guido van Rossume7ba4952007-06-06 23:52:48 +0000875- None, True, False are now keywords.
876
Guido van Rossum29478ef2007-05-29 00:39:44 +0000877- PEP 3119: isinstance() and issubclass() can be overridden.
878
Guido van Rossumebe3e162007-05-17 18:20:34 +0000879- Remove BaseException.message.
880
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000881- Remove tuple parameter unpacking (PEP 3113).
882
Georg Brandl52b92cc2008-05-25 09:43:03 +0000883- Remove the f_restricted attribute from frames. This naturally leads
884 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000885
Georg Brandl52b92cc2008-05-25 09:43:03 +0000886- PEP 3132 was accepted. That means that you can do ``a, *b =
887 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000888
Georg Brandl52b92cc2008-05-25 09:43:03 +0000889- range() now returns an iterator rather than a list. Floats are not
890 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000891
Nick Coghlan650f0d02007-04-15 12:05:43 +0000892- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000893 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000894
Guido van Rossume27dc722007-03-27 22:37:34 +0000895- By default, != returns the opposite of ==, unless the latter returns
896 NotImplemented.
897
Georg Brandl52b92cc2008-05-25 09:43:03 +0000898- Patch #1680961: sys.exitfunc has been removed and replaced with a
899 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000900
Georg Brandl801dd732007-03-18 20:18:31 +0000901- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000902 keyword arg in the class statement, which can now use the full
903 syntax of a parameter list. Also, the metaclass can implement a
904 __prepare__ function which will be called to create the dictionary
905 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000906
Georg Brandl428f0642007-03-18 18:35:15 +0000907- The long-deprecated argument "pend" of PyFloat_FromString() has been
908 removed.
909
Georg Brandle32b4222007-03-10 22:13:27 +0000910- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000911 its argument, if it exists. If not, it will work like before. This
912 allows customizing the output of dir() in the presence of a
913 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000914
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000915- Removed support for __members__ and __methods__.
916
Georg Brandle32b4222007-03-10 22:13:27 +0000917- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000918
Georg Brandle32b4222007-03-10 22:13:27 +0000919- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000920 functionality formerly known as raw_input(); the name raw_input() is
921 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000922
Georg Brandl52b92cc2008-05-25 09:43:03 +0000923- Classes listed in an 'except' clause must inherit from
924 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000925
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000926- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000927 and .keys(), .items(), .values() return dict views, which behave
928 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000929
Guido van Rossum8b545362007-02-09 23:52:14 +0000930- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000931 'softspace' attribute of files is now gone (since print() doesn't
932 use it). A side effect of this change is that you can get
933 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000934
935 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000936 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000937
938 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000939
Brett Cannon398db8b2007-01-29 23:44:37 +0000940- PEP 3102: keyword-only arguments.
941
Georg Brandl52b92cc2008-05-25 09:43:03 +0000942- Int/Long unification is complete. The 'long' built-in type and
943 literals with trailing 'L' or 'l' have been removed. Performance
944 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000945
946- 'except E, V' must now be spelled as 'except E as V' and deletes V
947 at the end of the except clause; V must be a simple name.
948
Neal Norwitzc1505362006-12-28 06:47:50 +0000949- Added function annotations per PEP 3107.
950
Georg Brandl52b92cc2008-05-25 09:43:03 +0000951- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000952
953 >>> def f(x):
954 ... def inc():
955 ... nonlocal x
956 ... x += 1
957 ... return x
958 ... return inc
959 ...
960 >>> inc = f(0)
961 >>> inc()
962 1
963 >>> inc()
964 2
965
Georg Brandl66a796e2006-12-19 20:50:34 +0000966- Moved intern() to sys.intern().
967
968- exec is now a function.
969
970- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000971
Neal Norwitz4886cc32006-08-21 17:06:07 +0000972- Classic classes are a thing of the past. All classes are new style.
973
974- Exceptions *must* derive from BaseException.
975
976- Integer division always returns a float. The -Q option is no more.
977 All the following are gone:
978 * PyNumber_Divide and PyNumber_InPlaceDivide
979 * __div__, __rdiv__, and __idiv__
980 * nb_divide, nb_inplace_divide
981 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
982 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
983 if we want to re-use __div__ and friends. If we do, it will make
984 it harder to write code for both 2.x and 3.x.)
985
986- 'as' and 'with' are keywords.
987
988- Absolute import is the default behavior for 'import foo' etc.
989
Georg Brandl52b92cc2008-05-25 09:43:03 +0000990- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000991
Georg Brandl52b92cc2008-05-25 09:43:03 +0000992- Removed these Python builtins: apply(), callable(), coerce(),
993 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000994
Georg Brandl52b92cc2008-05-25 09:43:03 +0000995- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000996
Georg Brandl52b92cc2008-05-25 09:43:03 +0000997- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000998
999- Remove C API support for restricted execution.
1000
Guido van Rossumcf1be882007-08-30 22:07:17 +00001001- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +00001002 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +00001003 sequences of unequal length -- it now stops after the shortest one
1004 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001005
Georg Brandl52b92cc2008-05-25 09:43:03 +00001006- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001007
1008- Added class decorators per PEP 3129.
1009
1010
1011Extension Modules
1012-----------------
1013
Georg Brandl52b92cc2008-05-25 09:43:03 +00001014- Removed the imageop module. Obsolete long with its unit tests
1015 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001016
Georg Brandl52b92cc2008-05-25 09:43:03 +00001017- Removed these attributes from the operator module: div, idiv,
1018 __div__, __idiv__, isCallable, sequenceIncludes.
1019
1020- Removed these attributes from the sys module: exc_clear(), exc_type,
1021 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001022
1023
1024Library
1025-------
1026
Georg Brandl52b92cc2008-05-25 09:43:03 +00001027- Removed the compiler package. Use of the _ast module and (an
1028 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001029
Georg Brandl52b92cc2008-05-25 09:43:03 +00001030- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
1031 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
1032 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001033
Georg Brandl52b92cc2008-05-25 09:43:03 +00001034- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001035
Georg Brandl52b92cc2008-05-25 09:43:03 +00001036- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1037 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1038 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001039
Georg Brandl52b92cc2008-05-25 09:43:03 +00001040- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001041
Georg Brandl52b92cc2008-05-25 09:43:03 +00001042- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001043 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001044
Georg Brandl52b92cc2008-05-25 09:43:03 +00001045- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001046
Georg Brandl52b92cc2008-05-25 09:43:03 +00001047- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001048
1049- Patch #1680961: atexit has been reimplemented in C.
1050
Walter Dörwald41980ca2007-08-16 21:55:45 +00001051- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1052
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001053Build
1054-----
1055
1056C API
1057-----
1058
Georg Brandl52b92cc2008-05-25 09:43:03 +00001059- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001060
Georg Brandl52b92cc2008-05-25 09:43:03 +00001061- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1062 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001063
Georg Brandl52b92cc2008-05-25 09:43:03 +00001064- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001065
Georg Brandl52b92cc2008-05-25 09:43:03 +00001066- Removed these macros: staticforward, statichere, PyArg_GetInt,
1067 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001068
Georg Brandl52b92cc2008-05-25 09:43:03 +00001069- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1070 intintobjargproc, getreadbufferproc, getwritebufferproc,
1071 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001072
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001073Tests
1074-----
1075
Brett Cannone7a30f72008-03-03 03:36:27 +00001076- Removed test.testall as test.regrtest replaces it.
1077
Brett Cannonced04e02005-02-13 22:53:22 +00001078Documentation
1079-------------
1080
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001081Mac
1082---
1083
Georg Brandl52b92cc2008-05-25 09:43:03 +00001084- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001085
Guido van Rossum845702c2007-08-30 18:44:53 +00001086Platforms
1087---------
1088
1089- Support for BeOS and AtheOS was removed (according to PEP 11).
1090
1091- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1092
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001093Tools/Demos
1094-----------
1095
Georg Brandl52b92cc2008-05-25 09:43:03 +00001096
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001097**(For information about older versions, consult the HISTORY file.)**