blob: 6aa4703761f3fe49f29a8d1ffa72e94e589daf00 [file] [log] [blame]
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001+++++++++++
2Python News
3+++++++++++
4
Anthony Baxterb0c66302004-11-04 05:23:17 +00005(editors: check NEWS.help for information about editing NEWS using ReST.)
6
Barry Warsaw8509df72008-08-21 03:02:47 +00007What's New in Python 3.0 release candidate 1
8============================================
9
10*Release date: XX-XXXX-2008*
11
12Core and Builtins
13-----------------
14
Antoine Pitroufff95302008-09-03 18:58:51 +000015- Issue #3696: Error parsing arguments on OpenBSD <= 4.4 and Cygwin. On
16 these systems, the mbstowcs() function is slightly buggy and must be
17 replaced with strlen() for the purpose of counting of number of wide
18 characters needed to represent the multi-byte character string.
19
Antoine Pitrou658fad82008-09-03 18:34:34 +000020- Issue #3697: "Fatal Python error: Cannot recover from stack overflow"
21 could be easily encountered under Windows in debug mode when exercising
22 the recursion limit checking code, due to bogus handling of recursion
23 limit when USE_STACKCHEK was enabled.
24
Brett Cannon54bd41d2008-09-02 04:01:42 +000025- Issue 3639: The _warnings module could segfault the interpreter when
26 unexpected types were passed in as arguments.
27
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +000028- Issue #3712: The memoryview object had a reference leak and didn't support
29 cyclic garbage collection.
30
Antoine Pitrouf71995782008-08-29 18:37:05 +000031- Issue #3668: Fix a memory leak with the "s*" argument parser in
32 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
33 was correctly parsed but parsing of subsequent arguments failed.
34
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +000035- Issue #3611: An exception __context__ could be cleared in a complex pattern
36 involving a __del__ method re-raising an exception.
37
Antoine Pitrouec569b72008-08-26 22:40:48 +000038- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
39 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
40 mechanism. In the process, fix a bug where isinstance() and issubclass(),
41 when given a tuple of classes as second argument, were looking up
42 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
43 type object.
44
Antoine Pitroue2dffc02008-08-26 22:02:58 +000045- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
46
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +000047- Issue #3651: Fix various memory leaks when using the buffer
48 interface, or when the "s#" code of PyArg_ParseTuple is given a
49 bytes object.
50
Neal Norwitz6ae2eb22008-08-24 23:50:08 +000051- Issue #3657: Fix uninitialized memory read when pickling longs.
52 Found by valgrind.
53
Neal Norwitz3ce5d922008-08-24 07:08:55 +000054- Apply security patches from Apple.
55
Neal Norwitz2f99b242008-08-24 05:48:10 +000056- Fix crashes on memory allocation failure found with failmalloc.
57
58- Fix memory leaks found with valgrind and update suppressions file.
59
60- Fix compiler warnings in opt mode which would lead to invalid memory reads.
61
62- Fix problem using wrong name in decimal module reported by pychecker.
63
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000064- Issue #3650: Fixed a reference leak in bytes.split('x').
65
Benjamin Petersonc15a0732008-08-26 16:46:47 +000066- bytes(o) now tries to use o.__bytes__() before using fallbacks.
67
68C API
69-----
70
71- PyObject_Bytes and PyBytes_FromObject were added.
72
Barry Warsaw8509df72008-08-21 03:02:47 +000073Library
74-------
75
Benjamin Peterson6ba23322008-09-03 22:59:38 +000076- The bsddb module (and therefore the dbm.bsd module) has been removed.
77
Facundo Batistac469d4c2008-09-03 22:49:01 +000078- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
79 to the urlparse one. Added a DeprecationWarning in the old module, it
80 will be deprecated in the future.
81
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +000082- Issue #3719: platform.architecture() fails if there are spaces in the
83 path to the Python binary.
84
Brett Cannonec92e182008-09-02 02:46:59 +000085- Issue 3602: As part of the merge of r66135, make the parameters on
86 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
87
Benjamin Petersonb3085c92008-09-01 23:09:31 +000088- The deprecation warnings for the camelCase threading API names were removed.
89
Jesse Noller338f5782008-09-03 18:22:19 +000090- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
91 SEM_VALUE_MAX.
92
Benjamin Peterson6784eb72008-08-23 20:32:27 +000093Extension Modules
94-----------------
95
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +000096- Issue #2975: When compiling several extension modules with Visual Studio 2008
97 from the same python interpreter, some environment variables would grow
98 without limit.
99
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000100- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
101 exploitation of poor argument checking.
102
Jesus Cea6ba33292008-08-31 14:12:11 +0000103- bsddb code updated to version 4.7.3pre2. This code is the same than
104 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
105 The Python code is automatically translated using "2to3". Please, do not
106 update this code in Python 3.0 by hand. Update the 2.6 one and then
107 do "2to3".
108
Neal Norwitz8f2f22a2008-08-24 20:59:23 +0000109Tools/Demos
110-----------
111
112- Fix Misc/gdbinit so it works.
113
Barry Warsaw8509df72008-08-21 03:02:47 +0000114
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000115What's new in Python 3.0b3?
116===========================
117
Barry Warsaw57c10582008-08-21 02:39:51 +0000118*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000119
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000120Core and Builtins
121-----------------
122
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000123- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
124 arguments.
125
Antoine Pitrou616d2852008-08-19 22:09:34 +0000126- Issue #2394: implement more of the memoryview API, with the caveat that
127 only one-dimensional contiguous buffers are supported and exercised right
128 now. Slicing, slice assignment and comparison (equality and inequality)
129 have been added. Also, the tolist() method has been implemented, but only
130 for byte buffers. Endly, the API has been updated to return bytes objects
131 wherever it used to return bytearrays.
132
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000133- Issue #3560: clean up the new C PyMemoryView API so that naming is
134 internally consistent; add macros PyMemoryView_GET_BASE() and
135 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
136 without relying on a particular implementation; remove the ill-named
137 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
138
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000139- ctypes function pointers that are COM methods have a boolean True
140 value again.
141
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000142- Issue #1819: function calls with several named parameters are now on
143 average 35% faster (as measured by pybench).
144
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000145- The undocumented C APIs PyUnicode_AsString() and
146 PyUnicode_AsStringAndSize() were made private to the interpreter, in
147 order to be able to refine their interfaces for Python 3.1.
148
149 If you need to access the UTF-8 representation of a Unicode object
150 as bytes string, please use PyUnicode_AsUTF8String() instead.
151
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000152- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
153 to Python 3.0's stricter semantics which allow to avoid successive
154 reallocations of the result string (this also affects str.join()).
155
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000156
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000157Library
158-------
159
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000160- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
161 a build problem on MacOS with CJK locales. It adds four temporary
162 mappings to existing legacy codecs that are virtually compatible
163 with Mac encodings. They will be replaced by codecs correctly
164 implemented in 3.1.
165
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000166- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
167 "global name 'header' is not defined".
168
Antoine Pitroufd036452008-08-19 17:56:33 +0000169- Issue #2834: update the regular expression library to match the unicode
170 standards of py3k. In other words, mixing bytes and unicode strings
171 (be it as pattern, search string or replacement string) raises a TypeError.
172 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
173 and can be disabled by specifying a new re.ASCII flag; as for bytes
174 patterns, ASCII matching is the only option and trying to specify re.UNICODE
175 for such patterns raises a ValueError.
176
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000177- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
178 Code contributed by Matt Giuca. quote() now encodes the input
179 before quoting, unquote() decodes after unquoting. There are
180 new arguments to change the encoding and errors settings.
181 There are also new APIs to skip the encode/decode steps.
182 [un]quote_plus() are also affected.
183
Nick Coghlan36f49522008-08-18 12:31:52 +0000184- Issue #2235: numbers.Number now blocks inheritance of the default id()
185 based hash because that hash mechanism is not correct for numeric types.
186 All concrete numeric types that inherit from Number (rather than just
187 registering with it) must explicitly provide a hash implementation in
188 order for their instances to be hashable.
189
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000190- Issue #2676: in the email package, content-type parsing was hanging on
191 pathological input because of quadratic or exponential behaviour of a
192 regular expression.
193
Antoine Pitrou87695762008-08-14 22:44:29 +0000194- Issue #3476: binary buffered reading through the new "io" library is now
195 thread-safe.
196
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000197- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
198 menu entries were not deleted.
199
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000200- Remove the TarFileCompat class from tarfile.py.
201
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000202- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
203 accepts the same parameters. It just checks that its first argument is an
204 integer.
205
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000206- Issue #3394: zipfile.writestr sets external attributes when passed a
207 file name rather than a ZipInfo instance, so files are extracted with
208 mode 0600 rather than 000 under Unix.
209
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000210- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
211 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000212
Martin v. Löwis371bb502008-08-16 13:02:57 +0000213Extension Modules
214-----------------
215
216- Bug #3542: Support Unicode strings in _msi module.
217
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000218What's new in Python 3.0b2?
219===========================
220
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000221*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000222
223Core and Builtins
224-----------------
225
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000226- Issue #3008: the float type has a new instance method 'float.hex'
227 and a new class method 'float.fromhex' to convert floating-point
228 numbers to and from hexadecimal strings, respectively.
229
Eric Smithd68af8f2008-07-16 00:15:35 +0000230- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
231 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
232
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000233- Issue #3280: like chr(), the "%c" format now accepts unicode code points
234 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
235 "narrow Unicode" builds, the result is a string of 2 code units, forming a
236 UTF-16 surrogate pair.
237
Georg Brandld52429f2008-07-04 15:55:02 +0000238- Issue #3282: str.isprintable() should return False for undefined
239 Unicode characters.
240
Martin v. Löwis029656f2008-06-30 04:06:08 +0000241- Issue #3236: Return small longs from PyLong_FromString.
242
Benjamin Petersone6528212008-07-15 15:32:09 +0000243- Exception tracebacks now support exception chaining.
244
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000245Library
246-------
247
Brett Cannonc2542e92008-07-25 18:19:20 +0000248- Removed the sunaudio module. Use sunau instead.
249
Thomas Heller47bc8092008-08-19 06:38:12 +0000250- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
251 api functions without holding the GIL, which could lead to a fatal
252 error when they failed.
253
254- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
255
Georg Brandl30704ea02008-07-23 15:07:12 +0000256- Removed "ast" function aliases from the parser module.
257
Thomas Heller15383a02008-07-15 19:46:52 +0000258- Issue #3313: Fixed a crash when a failed dlopen() call does not set
259 a valid dlerror() message.
260
Thomas Heller0261e1e2008-07-15 17:25:07 +0000261- Issue #3258: Fixed a crash when a ctypes POINTER type to an
262 incomplete structure was created.
263
Georg Brandl1abcbf82008-07-01 19:28:43 +0000264- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
265 argument now must be a bytes object in any case.
266
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000267- Issue #3145: help("modules whatever") failed when trying to load the source
268 code of every single module of the standard library, including invalid files
269 used in the test suite.
270
Georg Brandlbded4d32008-07-17 18:15:35 +0000271- The gettext library now consistently uses Unicode strings for message ids
272 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000273
Benjamin Petersone6528212008-07-15 15:32:09 +0000274- The traceback module has been expanded to handle chained exceptions.
275
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000276C API
277-----
278
279- Issue #3247: the function Py_FindMethod was removed. Modern types should
280 use the tp_methods slot instead.
281
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000282Tools/Demos
283-----------
284
Georg Brandl336341f2008-07-01 20:21:28 +0000285- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000286
Georg Brandl336341f2008-07-01 20:21:28 +0000287- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000288
289
Brett Cannon0d71ee72008-05-08 18:13:40 +0000290What's new in Python 3.0b1?
291===========================
292
Barry Warsawc1e689e2008-06-19 00:35:43 +0000293*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000294
295Core and Builtins
296-----------------
297
Brett Cannondb734912008-06-27 00:52:15 +0000298- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
299 argument being anything other than a dict or None. Also fixed a bug in error
300 handling when 'message' and 'category' were both set to None, triggering a
301 bus error.
302
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000303- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
304 holds the last (strong) reference to its referent.
305
Georg Brandl559e5d72008-06-11 18:37:52 +0000306- Issue #2630: implement PEP 3138. repr() now returns printable
307 Unicode characters unescaped, to get an ASCII-only representation
308 of an object use ascii().
309
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000310- Issue #1342: On windows, Python could not start when installed in a
311 directory with non-ascii characters.
312
Martin v. Löwis1a214512008-06-11 05:26:20 +0000313- Implement PEP 3121: new module initialization and finalization API.
314
Georg Brandle1b5ac62008-06-04 13:06:58 +0000315- Removed the already-defunct ``-t`` option.
316
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000317- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
318 unmarshalling many code objects, which happens when importing a
319 large .pyc file (~1000 functions).
320
Georg Brandl52b92cc2008-05-25 09:43:03 +0000321- Issue #2963: fix merging oversight that disabled method cache for
322 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000323
Georg Brandlc9b09532008-05-25 09:24:38 +0000324- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
325
Georg Brandl52b92cc2008-05-25 09:43:03 +0000326- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000327
Georg Brandl52b92cc2008-05-25 09:43:03 +0000328- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
329 code now allows any unicode string and returns a utf-8 encoded
330 buffer, just like the "s#" code already does. The "z" code was
331 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000332
Georg Brandl52b92cc2008-05-25 09:43:03 +0000333- Issue #2863: generators now have a ``gen.__name__`` attribute that
334 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
335 ``func.func_code.co_name``. The repr() of a generator now also
336 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000337
338- Issue #2831: enumerate() now has a ``start`` argument.
339
Georg Brandl52b92cc2008-05-25 09:43:03 +0000340- Issue #2801: fix bug in the float.is_integer method where a
341 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000342
Georg Brandl52b92cc2008-05-25 09:43:03 +0000343- The ``--with-toolbox-glue`` option (and the associated
344 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000345
Georg Brandl52b92cc2008-05-25 09:43:03 +0000346- Issue #2196: hasattr() now lets exceptions which do not inherit
347 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
348 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000349
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000350- #3021 Exception reraising sematics have been significantly improved. However,
351 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
352 code anymore.
353
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000354- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
355 removed.
356
Brett Cannon0d71ee72008-05-08 18:13:40 +0000357Extension Modules
358-----------------
359
Georg Brandl38feaf02008-05-25 07:45:51 +0000360- Renamed ``_winreg`` module to ``winreg``.
361
Georg Brandl52b92cc2008-05-25 09:43:03 +0000362- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
363 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000364
365- Support for Windows 9x has been removed from the winsound module.
366
Georg Brandl52b92cc2008-05-25 09:43:03 +0000367- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000368
Brett Cannon0d71ee72008-05-08 18:13:40 +0000369Library
370-------
371
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000372- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
373 symtable.Symbol have been removed.
374
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000375- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
376
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000377- a new ``urllib`` package was created. It consists of code from
378 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
379 modules have all been removed. The new package has five submodules:
380 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
381 ``urllib.error``, and ``urllib.robotparser``. The
382 ``urllib.request.urlopen()`` function uses the url opener from
383 ``urllib2``. (Note that the unittests have not been renamed for the
384 beta, but they will be renamed in the future.)
385
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000386- rfc822 has been removed in favor of the email package.
387
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000388- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000389
Barry Warsawf5019422008-06-12 02:42:00 +0000390- Patch #2849: Remove use of rfc822 module from standard library.
391
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000392- Added C optimized implementation of io.StringIO.
393
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000394- The ``pickle`` module is now automatically use an optimized C
395 implementation of Pickler and Unpickler when available. The
396 ``cPickle`` module is no longer needed.
397
Georg Brandl877b10a2008-06-01 21:25:55 +0000398- Removed the ``htmllib`` and ``sgmllib`` modules.
399
Georg Brandl61013952008-05-28 15:56:30 +0000400- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
401 been removed from ``http.cookies``.
402
Brett Cannona23810f2008-05-26 19:04:21 +0000403- The ``commands`` module has been removed. Its getoutput() and
404 getstatusoutput() functions have been moved to the ``subprocess`` module.
405
Georg Brandl3d5c4252008-05-26 18:03:26 +0000406- The ``http`` package was created; it contains the old ``httplib``
407 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
408 as ``http.cookiejar``, and the content of the three ``HTTPServer``
409 modules as ``http.server``.
410
Georg Brandl38eceaa2008-05-26 11:14:17 +0000411- The ``xmlrpc`` package was created; it contains the old
412 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
413 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000414 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000415
416- The ``dbm`` package was created, containing the old modules
417 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
418 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
419 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
420 as submodules.
421
Georg Brandl52b92cc2008-05-25 09:43:03 +0000422- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000423
Georg Brandl52b92cc2008-05-25 09:43:03 +0000424- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000425
Georg Brandl52b92cc2008-05-25 09:43:03 +0000426- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000427
Georg Brandl52b92cc2008-05-25 09:43:03 +0000428- Issue #2250: Exceptions raised during evaluation of names in
429 rlcompleter's ``Completer.complete()`` method are now caught and
430 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000431
Georg Brandl52b92cc2008-05-25 09:43:03 +0000432- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
433 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000434
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000435- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
436 large to fit in a C long. ldexp(x, n) now returns a zero (with
437 suitable sign) if n is large and negative; previously, it raised
438 OverflowError.
439
Georg Brandl52b92cc2008-05-25 09:43:03 +0000440- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000441
Georg Brandl52b92cc2008-05-25 09:43:03 +0000442- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000443
Georg Brandl52b92cc2008-05-25 09:43:03 +0000444- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000445
Georg Brandl52b92cc2008-05-25 09:43:03 +0000446- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000447
Georg Brandl52b92cc2008-05-25 09:43:03 +0000448- Fixed the ``__all__`` setting on ``collections`` to include
449 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000450
Brett Cannoncf3520c2008-05-11 22:47:58 +0000451- The sre module has been removed.
452
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000453- The Queue module has been renamed to queue.
454
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000455- The copy_reg module has been renamed to copyreg.
456
Brett Cannond8b61ee2008-05-11 03:00:26 +0000457- The mhlib module has been removed.
458
Brett Cannonbd474422008-05-10 22:42:14 +0000459- The ihooks module has been removed.
460
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000461- The fpformat module has been removed.
462
Brett Cannonf4fd9932008-05-10 21:11:46 +0000463- The dircache module has been removed.
464
Brett Cannond175b4c2008-05-10 03:19:54 +0000465- The Canvas module has been removed.
466
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000467- The Decimal module gained the magic methods __round__, __ceil__,
468 __floor__ and __trunc__, to give support for round, math.ceil,
469 math.floor and math.trunc.
470
Brett Cannon900ee3a2008-05-08 20:31:11 +0000471- The user module has been removed.
472
Brett Cannon34afe872008-05-08 20:31:44 +0000473- The mutex module has been removed.
474
Brett Cannon0d71ee72008-05-08 18:13:40 +0000475- The imputil module has been removed.
476
Georg Brandl52b92cc2008-05-25 09:43:03 +0000477- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000478
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000479- pdb gained the "until" command.
480
Georg Brandl52b92cc2008-05-25 09:43:03 +0000481- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000482
Georg Brandl32de7af2008-08-18 23:07:41 +0000483- The threading module API was renamed to be PEP 8 compliant. The
484 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000485
Georg Brandl294d5a92008-06-01 19:25:32 +0000486Tools/Demos
487-----------
488
489- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000490
Brett Cannon0d71ee72008-05-08 18:13:40 +0000491Build
492-----
493
494
Barry Warsaw66079cd2008-04-04 01:36:36 +0000495What's New in Python 3.0a5?
496===========================
497
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000498*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000499
500Core and Builtins
501-----------------
502
Georg Brandl52b92cc2008-05-25 09:43:03 +0000503- Fixed misbehaviour of PyLong_FromSsize_t on systems where
504 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000505
Georg Brandl52b92cc2008-05-25 09:43:03 +0000506- Issue #2221: Corrected a SystemError "error return without exception
507 set", when the code executed by exec() raises an exception, and
508 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000509
Georg Brandl52b92cc2008-05-25 09:43:03 +0000510- Bug #2565: The repr() of type objects now calls them 'class', not
511 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000512
Martin v. Löwis790465f2008-04-05 20:41:37 +0000513- The command line processing was converted to pass Unicode strings
514 through as unmodified as possible; as a consequence, the C API
515 related to command line arguments was changed to use wchar_t.
516
Georg Brandl52b92cc2008-05-25 09:43:03 +0000517- All backslashes in raw strings are interpreted literally. This
518 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000519
Barry Warsaw66079cd2008-04-04 01:36:36 +0000520Extension Modules
521-----------------
522
523Library
524-------
525
Georg Brandl52b92cc2008-05-25 09:43:03 +0000526- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000527
Thomas Hellere106dc32008-04-24 18:39:36 +0000528- Issue #2682: ctypes callback functions now longer contain a cyclic
529 reference to themselves.
530
Georg Brandl52b92cc2008-05-25 09:43:03 +0000531- Issue #2058: Remove the buf attribute and add __slots__ to the
532 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000533
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000534- Bug #2606: Avoid calling .sort() on a dict_keys object.
535
Thomas Hellerbff533b2008-04-04 19:53:14 +0000536- The bundled libffi copy is now in sync with the recently released
537 libffi3.0.5 version, apart from some small changes to
538 Modules/_ctypes/libffi/configure.ac.
539
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000540Build
541-----
542
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000543- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
544
Guido van Rossumdc21db32008-04-07 18:37:41 +0000545- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000546 accidentally overwriting a Python 2.x installation. Use "make
547 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000548
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000549- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
550 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000551
Georg Brandl52b92cc2008-05-25 09:43:03 +0000552
Barry Warsawa9d499d2008-03-01 18:38:07 +0000553What's New in Python 3.0a4?
554===========================
555
Barry Warsawbb5cd082008-04-02 23:33:27 +0000556*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000557
Martin v. Löwis25931462008-03-17 20:43:42 +0000558Core and Builtins
559-----------------
560
561- Bug #2301: Don't try decoding the source code into the original
562 encoding for syntax errors.
563
Martin v. Löwis92fab752008-03-08 10:40:41 +0000564Extension Modules
565-----------------
566
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000567- The dl module was removed, use the ctypes module instead.
568
Martin v. Löwis92fab752008-03-08 10:40:41 +0000569- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000570
Martin v. Löwis071ef772008-03-08 11:24:24 +0000571Library
572-------
573
Georg Brandl52b92cc2008-05-25 09:43:03 +0000574- The class distutils.commands.build_py.build_py_2to3 can be used as a
575 build_py replacement to automatically run 2to3 on modules that are
576 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000577
Guido van Rossumf4169812008-03-17 22:56:06 +0000578- A new pickle protocol (protocol 3) is added with explicit support
579 for bytes. This is the default protocol. It intentionally cannot
580 be unpickled by Python 2.x.
581
582- When a pickle written by Python 2.x contains an (8-bit) str
583 instance, this is now decoded to a (Unicode) str instance. The
584 encoding used to do this defaults to ASCII, but can be overridden
585 via two new keyword arguments to the Unpickler class. Previously
586 this would create bytes instances, which is usually wrong: str
587 instances are often used to pickle attribute names etc., and text is
588 more common than binary data anyway.
589
Martin v. Löwis071ef772008-03-08 11:24:24 +0000590- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000591 system doesn't support CODESET and LANG isn't set or doesn't allow
592 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000593
Georg Brandl52b92cc2008-05-25 09:43:03 +0000594- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
595 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000596
Georg Brandl52b92cc2008-05-25 09:43:03 +0000597- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
598 has been renamed tokenize and now works with bytes rather than
599 strings. A new detect_encoding function has been added for
600 determining source file encoding according to PEP-0263. Token
601 sequences returned by tokenize always start with an ENCODING token
602 which specifies the encoding used to decode the file. This token is
603 used to encode the output of untokenize back to bytes.
604
Barry Warsawa9d499d2008-03-01 18:38:07 +0000605
Christian Heimesbc873412007-12-08 22:11:32 +0000606What's New in Python 3.0a3?
607===========================
608
Barry Warsaw659fc422008-03-01 17:45:23 +0000609*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000610
611Core and Builtins
612-----------------
613
Georg Brandl52b92cc2008-05-25 09:43:03 +0000614- Issue #2282: io.TextIOWrapper was not overriding seekable() from
615 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000616
Georg Brandl52b92cc2008-05-25 09:43:03 +0000617- Issue #2115: Important speedup in setting __slot__ attributes. Also
618 prevent a possible crash: an Abstract Base Class would try to access
619 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000620
Georg Brandl52b92cc2008-05-25 09:43:03 +0000621- Fixed repr() and str() of complex numbers with infinity or nan as
622 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000623
Georg Brandl52b92cc2008-05-25 09:43:03 +0000624- Clear all free list during a gc.collect() of the highest generation
625 in order to allow pymalloc to free more arenas. Python may give back
626 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000627
Georg Brandl52b92cc2008-05-25 09:43:03 +0000628- Issue #2045: Fix an infinite recursion triggered when printing a
629 subclass of collections.defaultdict, if its default_factory is set
630 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000631
632- Fixed a minor memory leak in dictobject.c. The content of the free
633 list was not freed on interpreter shutdown.
634
Georg Brandl52b92cc2008-05-25 09:43:03 +0000635- Limit free list of method and builtin function objects to 256
636 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000637
Georg Brandl52b92cc2008-05-25 09:43:03 +0000638- Patch #1953: Added ``sys._compact_freelists()`` and the C API
639 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000640 to compact the internal free lists of pre-allocted ints and floats.
641
642- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000643 Python expected the return type int but the fork familie returns
644 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000645
Georg Brandl52b92cc2008-05-25 09:43:03 +0000646- Issue #1678380: Fix a bug that identifies 0j and -0j when they
647 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000648
Georg Brandl52b92cc2008-05-25 09:43:03 +0000649- Issue #2025: Added tuple.count() and tuple.index() methods to comply
650 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000651
Georg Brandl52b92cc2008-05-25 09:43:03 +0000652- Fixed multiple reinitialization of the Python interpreter. The small
653 int list in longobject.c has caused a seg fault during the third
654 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000655
Georg Brandl52b92cc2008-05-25 09:43:03 +0000656- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000657
Georg Brandl52b92cc2008-05-25 09:43:03 +0000658- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000659
Georg Brandl52b92cc2008-05-25 09:43:03 +0000660- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000661
Georg Brandl52b92cc2008-05-25 09:43:03 +0000662- map() no longer accepts None for the first argument. Use zip()
663 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000664
Facundo Batista2336bdd2008-01-19 19:12:01 +0000665- Issue #1769: Now int("- 1") is not allowed any more.
666
Georg Brandl52b92cc2008-05-25 09:43:03 +0000667- Object/longobject.c: long(float('nan')) raises an OverflowError
668 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000669
Georg Brandl52b92cc2008-05-25 09:43:03 +0000670- Issue #1762972: __file__ points to the source file instead of the
671 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000672
Guido van Rossumab078dd2008-01-06 00:09:11 +0000673- Issue #1393: object_richcompare() returns NotImplemented instead of
674 False if the objects aren't equal, to give the other side a chance.
675
Guido van Rossume239b002008-01-06 00:44:20 +0000676- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000677
Georg Brandl52b92cc2008-05-25 09:43:03 +0000678- Improve some exception messages when Windows fails to load an
679 extension module. Now we get for example '%1 is not a valid Win32
680 application' instead of 'error code 193'. Also use Unicode strings
681 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000682
Georg Brandl52b92cc2008-05-25 09:43:03 +0000683- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
684 Python C API has gained a new type *PyInstanceMethod_Type* and the
685 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
686 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000687
Georg Brandl52b92cc2008-05-25 09:43:03 +0000688- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
689 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
690 are now enough to print the corresponding list of objects considered
691 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000692
Georg Brandl52b92cc2008-05-25 09:43:03 +0000693- Issue #1573: Improper use of the keyword-only syntax makes the
694 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000695
Georg Brandl52b92cc2008-05-25 09:43:03 +0000696- Issue #1564: The set implementation should special-case PyUnicode
697 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000698
Guido van Rossumea6775b2008-02-21 20:16:31 +0000699- Patch #1031213: Decode source line in SyntaxErrors back to its
700 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000701
Christian Heimes09aaa882008-02-23 15:01:06 +0000702- inspect.getsource() includes the decorators again.
703
Guido van Rossumea6775b2008-02-21 20:16:31 +0000704- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
705 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000706
Georg Brandl52b92cc2008-05-25 09:43:03 +0000707- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
708 the first chunk fed to the decoder started with a BOM, but was
709 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000710
Christian Heimesbc873412007-12-08 22:11:32 +0000711Extension Modules
712-----------------
713
Georg Brandl52b92cc2008-05-25 09:43:03 +0000714- Code for itertools ifilter(), imap(), and izip() moved to bultins
715 and renamed to filter(), map(), and zip(). Also, renamed
716 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000717
Georg Brandl52b92cc2008-05-25 09:43:03 +0000718- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000719
Georg Brandl52b92cc2008-05-25 09:43:03 +0000720- Bug #2111: mmap segfaults when trying to write a block opened with
721 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000722
Georg Brandl52b92cc2008-05-25 09:43:03 +0000723- Issue #2063: correct order of utime and stime in os.times() result
724 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000725
Christian Heimesbc873412007-12-08 22:11:32 +0000726Library
727-------
728
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000729- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000730
Georg Brandl52b92cc2008-05-25 09:43:03 +0000731- Created new UserDict class in collections module. This one inherits
732 from and complies with the MutableMapping ABC. Also, moved
733 UserString and UserList to the collections module. The
734 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000735
Guido van Rossumea6775b2008-02-21 20:16:31 +0000736- Removed UserDict.DictMixin. Replaced all its uses with
737 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000738
Guido van Rossume239b002008-01-06 00:44:20 +0000739- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000740
Guido van Rossume239b002008-01-06 00:44:20 +0000741- Issue #1585: IDLE uses non-existent xrange() function.
742
743- Issue #1578: Problems in win_getpass.
744
Georg Brandl52d168a2008-01-07 18:10:24 +0000745Build
746-----
747
Georg Brandl52b92cc2008-05-25 09:43:03 +0000748- Renamed --enable-unicode configure flag to --with-wide-unicode,
749 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000750
Guido van Rossume239b002008-01-06 00:44:20 +0000751C API
752-----
753
754- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
755 Py_TYPE and Py_REFCNT.
756
Georg Brandl52b92cc2008-05-25 09:43:03 +0000757- New API PyImport_ImportModuleNoBlock(), works like
758 PyImport_ImportModule() but won't block on the import lock
759 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000760
Christian Heimesbc873412007-12-08 22:11:32 +0000761
Fred Drake0e474a82007-10-11 18:01:43 +0000762What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000763===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000764
Guido van Rossum99533a92007-12-06 05:07:41 +0000765*Release date: 07-Dec-2007*
766
767(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000768
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000769Core and Builtins
770-----------------
771
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000772- str8 now has the same construction signature as bytes.
773
Georg Brandl52b92cc2008-05-25 09:43:03 +0000774- Comparisons between str and str8 now return False/True for ==/!=.
775 sqlite3 returns str8 when recreating on object from it's __conform__
776 value. The struct module returns str8 for all string-related
777 formats. This was true before this change, but becomes more
778 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000779
Georg Brandl52b92cc2008-05-25 09:43:03 +0000780- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
781 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000782
783- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
784
785- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000786 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000787 `PyUnicode_DecodeFSDefault(char*)` was added.
788
Georg Brandl52b92cc2008-05-25 09:43:03 +0000789- io.open() and _fileio.FileIO have grown a new argument closefd. A
790 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000791
Georg Brandl52b92cc2008-05-25 09:43:03 +0000792- Added a new option -b to issues warnings (-bb for errors) about
793 certain operations between bytes/buffer and str like str(b'') and
794 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000795
Georg Brandl52b92cc2008-05-25 09:43:03 +0000796- The standards streams sys.stdin, stdout and stderr may be None when
797 the when the C runtime library returns an invalid file descriptor
798 for the streams (fileno(stdin) < 0). For now this happens only for
799 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000800
Christian Heimesbce52be2007-11-17 19:08:41 +0000801- Added PCbuild9 directory for VS 2008.
802
Georg Brandl52b92cc2008-05-25 09:43:03 +0000803- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
804 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000805
Georg Brandl52b92cc2008-05-25 09:43:03 +0000806- Unbound methods are gone for good. ClassObject.method returns an
807 ordinary function object, instance.method still returns a bound
808 method object. The API of bound methods is cleaned up, too. The
809 im_class attribute is removed and im_func + im_self are renamed to
810 __func__ and __self__. The factory PyMethod_New takes only func and
811 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000812
Georg Brandl52b92cc2008-05-25 09:43:03 +0000813- intobject.h is no longer included by Python.h. The remains were
814 moved to longobject.h. It still exists to define several aliases
815 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000816
Christian Heimesa37d4c62007-12-04 23:02:19 +0000817- Removed sys.maxint, use sys.maxsize instead.
818
Fred Drake0e474a82007-10-11 18:01:43 +0000819Extension Modules
820-----------------
821
822- The `hotshot` profiler has been removed; use `cProfile` instead.
823
Brett Cannone9fd2312007-10-12 19:18:19 +0000824Library
825-------
826
Georg Brandl52b92cc2008-05-25 09:43:03 +0000827- When loading an external file using testfile(), the passed-in
828 encoding argument was being ignored if __loader__ is defined and
829 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000830
Georg Brandl52b92cc2008-05-25 09:43:03 +0000831- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
832 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000833
Christian Heimesc9543e42007-11-28 08:28:28 +0000834- Removed the 'new' module.
835
Georg Brandl52b92cc2008-05-25 09:43:03 +0000836- Removed all types from the 'types' module that are easily accessable
837 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000838
Georg Brandl52d168a2008-01-07 18:10:24 +0000839
Guido van Rossum4405cf32007-08-30 17:16:55 +0000840What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000841==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000842
Guido van Rossum4405cf32007-08-30 17:16:55 +0000843*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000844
845Core and Builtins
846-----------------
847
Martin v. Löwis47383402007-08-15 07:32:56 +0000848- PEP 3131: Support non-ASCII identifiers.
849
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000850- PEP 3120: Change default encoding to UTF-8.
851
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000852- PEP 3123: Use proper C inheritance for PyObject.
853
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000854- Removed the __oct__ and __hex__ special methods and added a bin()
855 builtin function.
856
Georg Brandl52b92cc2008-05-25 09:43:03 +0000857- PEP 3127: octal literals now start with "0o". Old-style octal
858 literals are invalid. There are binary literals with a prefix of
859 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000860
Guido van Rossume7ba4952007-06-06 23:52:48 +0000861- None, True, False are now keywords.
862
Guido van Rossum29478ef2007-05-29 00:39:44 +0000863- PEP 3119: isinstance() and issubclass() can be overridden.
864
Guido van Rossumebe3e162007-05-17 18:20:34 +0000865- Remove BaseException.message.
866
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000867- Remove tuple parameter unpacking (PEP 3113).
868
Georg Brandl52b92cc2008-05-25 09:43:03 +0000869- Remove the f_restricted attribute from frames. This naturally leads
870 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000871
Georg Brandl52b92cc2008-05-25 09:43:03 +0000872- PEP 3132 was accepted. That means that you can do ``a, *b =
873 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000874
Georg Brandl52b92cc2008-05-25 09:43:03 +0000875- range() now returns an iterator rather than a list. Floats are not
876 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000877
Nick Coghlan650f0d02007-04-15 12:05:43 +0000878- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000879 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000880
Guido van Rossume27dc722007-03-27 22:37:34 +0000881- By default, != returns the opposite of ==, unless the latter returns
882 NotImplemented.
883
Georg Brandl52b92cc2008-05-25 09:43:03 +0000884- Patch #1680961: sys.exitfunc has been removed and replaced with a
885 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000886
Georg Brandl801dd732007-03-18 20:18:31 +0000887- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000888 keyword arg in the class statement, which can now use the full
889 syntax of a parameter list. Also, the metaclass can implement a
890 __prepare__ function which will be called to create the dictionary
891 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000892
Georg Brandl428f0642007-03-18 18:35:15 +0000893- The long-deprecated argument "pend" of PyFloat_FromString() has been
894 removed.
895
Georg Brandle32b4222007-03-10 22:13:27 +0000896- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000897 its argument, if it exists. If not, it will work like before. This
898 allows customizing the output of dir() in the presence of a
899 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000900
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000901- Removed support for __members__ and __methods__.
902
Georg Brandle32b4222007-03-10 22:13:27 +0000903- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000904
Georg Brandle32b4222007-03-10 22:13:27 +0000905- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000906 functionality formerly known as raw_input(); the name raw_input() is
907 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000908
Georg Brandl52b92cc2008-05-25 09:43:03 +0000909- Classes listed in an 'except' clause must inherit from
910 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000911
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000912- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000913 and .keys(), .items(), .values() return dict views, which behave
914 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000915
Guido van Rossum8b545362007-02-09 23:52:14 +0000916- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000917 'softspace' attribute of files is now gone (since print() doesn't
918 use it). A side effect of this change is that you can get
919 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000920
921 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000922 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000923
924 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000925
Brett Cannon398db8b2007-01-29 23:44:37 +0000926- PEP 3102: keyword-only arguments.
927
Georg Brandl52b92cc2008-05-25 09:43:03 +0000928- Int/Long unification is complete. The 'long' built-in type and
929 literals with trailing 'L' or 'l' have been removed. Performance
930 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000931
932- 'except E, V' must now be spelled as 'except E as V' and deletes V
933 at the end of the except clause; V must be a simple name.
934
Neal Norwitzc1505362006-12-28 06:47:50 +0000935- Added function annotations per PEP 3107.
936
Georg Brandl52b92cc2008-05-25 09:43:03 +0000937- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000938
939 >>> def f(x):
940 ... def inc():
941 ... nonlocal x
942 ... x += 1
943 ... return x
944 ... return inc
945 ...
946 >>> inc = f(0)
947 >>> inc()
948 1
949 >>> inc()
950 2
951
Georg Brandl66a796e2006-12-19 20:50:34 +0000952- Moved intern() to sys.intern().
953
954- exec is now a function.
955
956- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000957
Neal Norwitz4886cc32006-08-21 17:06:07 +0000958- Classic classes are a thing of the past. All classes are new style.
959
960- Exceptions *must* derive from BaseException.
961
962- Integer division always returns a float. The -Q option is no more.
963 All the following are gone:
964 * PyNumber_Divide and PyNumber_InPlaceDivide
965 * __div__, __rdiv__, and __idiv__
966 * nb_divide, nb_inplace_divide
967 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
968 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
969 if we want to re-use __div__ and friends. If we do, it will make
970 it harder to write code for both 2.x and 3.x.)
971
972- 'as' and 'with' are keywords.
973
974- Absolute import is the default behavior for 'import foo' etc.
975
Georg Brandl52b92cc2008-05-25 09:43:03 +0000976- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000977
Georg Brandl52b92cc2008-05-25 09:43:03 +0000978- Removed these Python builtins: apply(), callable(), coerce(),
979 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000980
Georg Brandl52b92cc2008-05-25 09:43:03 +0000981- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000982
Georg Brandl52b92cc2008-05-25 09:43:03 +0000983- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000984
985- Remove C API support for restricted execution.
986
Guido van Rossumcf1be882007-08-30 22:07:17 +0000987- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000988 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000989 sequences of unequal length -- it now stops after the shortest one
990 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000991
Georg Brandl52b92cc2008-05-25 09:43:03 +0000992- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000993
994- Added class decorators per PEP 3129.
995
996
997Extension Modules
998-----------------
999
Georg Brandl52b92cc2008-05-25 09:43:03 +00001000- Removed the imageop module. Obsolete long with its unit tests
1001 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001002
Georg Brandl52b92cc2008-05-25 09:43:03 +00001003- Removed these attributes from the operator module: div, idiv,
1004 __div__, __idiv__, isCallable, sequenceIncludes.
1005
1006- Removed these attributes from the sys module: exc_clear(), exc_type,
1007 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001008
1009
1010Library
1011-------
1012
Georg Brandl52b92cc2008-05-25 09:43:03 +00001013- Removed the compiler package. Use of the _ast module and (an
1014 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001015
Georg Brandl52b92cc2008-05-25 09:43:03 +00001016- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
1017 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
1018 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001019
Georg Brandl52b92cc2008-05-25 09:43:03 +00001020- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001021
Georg Brandl52b92cc2008-05-25 09:43:03 +00001022- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1023 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1024 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001025
Georg Brandl52b92cc2008-05-25 09:43:03 +00001026- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001027
Georg Brandl52b92cc2008-05-25 09:43:03 +00001028- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001029 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001030
Georg Brandl52b92cc2008-05-25 09:43:03 +00001031- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001032
Georg Brandl52b92cc2008-05-25 09:43:03 +00001033- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001034
1035- Patch #1680961: atexit has been reimplemented in C.
1036
Walter Dörwald41980ca2007-08-16 21:55:45 +00001037- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1038
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001039Build
1040-----
1041
1042C API
1043-----
1044
Georg Brandl52b92cc2008-05-25 09:43:03 +00001045- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001046
Georg Brandl52b92cc2008-05-25 09:43:03 +00001047- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1048 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001049
Georg Brandl52b92cc2008-05-25 09:43:03 +00001050- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001051
Georg Brandl52b92cc2008-05-25 09:43:03 +00001052- Removed these macros: staticforward, statichere, PyArg_GetInt,
1053 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001054
Georg Brandl52b92cc2008-05-25 09:43:03 +00001055- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1056 intintobjargproc, getreadbufferproc, getwritebufferproc,
1057 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001058
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001059Tests
1060-----
1061
Brett Cannone7a30f72008-03-03 03:36:27 +00001062- Removed test.testall as test.regrtest replaces it.
1063
Brett Cannonced04e02005-02-13 22:53:22 +00001064Documentation
1065-------------
1066
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001067Mac
1068---
1069
Georg Brandl52b92cc2008-05-25 09:43:03 +00001070- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001071
Guido van Rossum845702c2007-08-30 18:44:53 +00001072Platforms
1073---------
1074
1075- Support for BeOS and AtheOS was removed (according to PEP 11).
1076
1077- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1078
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001079Tools/Demos
1080-----------
1081
Georg Brandl52b92cc2008-05-25 09:43:03 +00001082
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001083**(For information about older versions, consult the HISTORY file.)**