blob: cacbef47806386959c269bd1c18d39d226a57391 [file] [log] [blame]
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001+++++++++++
2Python News
3+++++++++++
4
Anthony Baxterb0c66302004-11-04 05:23:17 +00005(editors: check NEWS.help for information about editing NEWS using ReST.)
6
Barry Warsaw8509df72008-08-21 03:02:47 +00007What's New in Python 3.0 release candidate 1
8============================================
9
10*Release date: XX-XXXX-2008*
11
12Core and Builtins
13-----------------
14
Antoine Pitrou5651eaa2008-09-06 20:46:58 +000015- Issue #3705: fix crash when given a non-ascii value on the command line for
16 the "-c" and "-m" parameters. Now the behaviour is as expected under Linux,
17 although under Windows it fails at a later point.
18
Benjamin Peterson791dc2f2008-09-05 23:27:15 +000019- Issue #3279: Importing site at interpreter was failing silently because the
20 site module uses the open builtin which was not initialized at the time.
21
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +000022- Issue #3660: Corrected a reference leak in str.encode() when the encoder
23 does not return a bytes object.
24
25- Issue #3774: Added a few more checks in PyTokenizer_FindEncoding to handle
Amaury Forgeot d'Arc1b933ed2008-09-04 22:34:09 +000026 error conditions.
27
Amaury Forgeot d'Arcf0481112008-09-05 20:48:47 +000028- Issue #3594: Fix Parser/tokenizer.c:fp_setreadl() to open the file being
Brett Cannon8a9583e2008-09-04 05:04:25 +000029 tokenized by either a file path or file pointer for the benefit of
30 PyTokenizer_FindEncoding().
31
Antoine Pitroufff95302008-09-03 18:58:51 +000032- Issue #3696: Error parsing arguments on OpenBSD <= 4.4 and Cygwin. On
33 these systems, the mbstowcs() function is slightly buggy and must be
34 replaced with strlen() for the purpose of counting of number of wide
35 characters needed to represent the multi-byte character string.
36
Antoine Pitrou658fad82008-09-03 18:34:34 +000037- Issue #3697: "Fatal Python error: Cannot recover from stack overflow"
38 could be easily encountered under Windows in debug mode when exercising
39 the recursion limit checking code, due to bogus handling of recursion
40 limit when USE_STACKCHEK was enabled.
41
Brett Cannon54bd41d2008-09-02 04:01:42 +000042- Issue 3639: The _warnings module could segfault the interpreter when
43 unexpected types were passed in as arguments.
44
Antoine Pitrouc6b09eb2008-09-01 15:10:14 +000045- Issue #3712: The memoryview object had a reference leak and didn't support
46 cyclic garbage collection.
47
Antoine Pitrouf71995782008-08-29 18:37:05 +000048- Issue #3668: Fix a memory leak with the "s*" argument parser in
49 PyArg_ParseTuple and friends, which occurred when the argument for "s*"
50 was correctly parsed but parsing of subsequent arguments failed.
51
Amaury Forgeot d'Arcdb26f7c2008-08-29 07:13:32 +000052- Issue #3611: An exception __context__ could be cleared in a complex pattern
53 involving a __del__ method re-raising an exception.
54
Antoine Pitrouec569b72008-08-26 22:40:48 +000055- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
56 match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
57 mechanism. In the process, fix a bug where isinstance() and issubclass(),
58 when given a tuple of classes as second argument, were looking up
59 __instancecheck__ / __subclasscheck__ on the tuple rather than on each
60 type object.
61
Antoine Pitroue2dffc02008-08-26 22:02:58 +000062- Issue #3663: Py_None was decref'd when printing SyntaxErrors.
63
Benjamin Peterson9edd2bd2008-08-27 00:31:37 +000064- Issue #3651: Fix various memory leaks when using the buffer
65 interface, or when the "s#" code of PyArg_ParseTuple is given a
66 bytes object.
67
Neal Norwitz6ae2eb22008-08-24 23:50:08 +000068- Issue #3657: Fix uninitialized memory read when pickling longs.
69 Found by valgrind.
70
Neal Norwitz3ce5d922008-08-24 07:08:55 +000071- Apply security patches from Apple.
72
Neal Norwitz2f99b242008-08-24 05:48:10 +000073- Fix crashes on memory allocation failure found with failmalloc.
74
75- Fix memory leaks found with valgrind and update suppressions file.
76
77- Fix compiler warnings in opt mode which would lead to invalid memory reads.
78
79- Fix problem using wrong name in decimal module reported by pychecker.
80
Amaury Forgeot d'Arc20443f32008-08-22 22:05:20 +000081- Issue #3650: Fixed a reference leak in bytes.split('x').
82
Benjamin Petersonc15a0732008-08-26 16:46:47 +000083- bytes(o) now tries to use o.__bytes__() before using fallbacks.
84
85C API
86-----
87
88- PyObject_Bytes and PyBytes_FromObject were added.
89
Barry Warsaw8509df72008-08-21 03:02:47 +000090Library
91-------
92
Antoine Pitrou5fe291f2008-09-06 23:00:03 +000093- Issue #874900: fix behaviour of threading module after a fork.
94
Antoine Pitrou9e4fdf42008-09-05 23:43:02 +000095- Issue #3535: zipfile couldn't read some zip files larger than 2GB.
96
97- Issue #3776: Deprecate the bsddb package for removal in 3.0.
98
99- Issue #3762: platform.architecture() fails if python is lanched via
100 its symbolic link.
101
Antoine Pitroud79dc622008-09-05 00:03:33 +0000102- Issue #3660: fix a memory leak in the C accelerator of the pickle module.
103
Antoine Pitrou1d6a16b2008-09-04 21:32:09 +0000104- Issue #3160: the "bdist_wininst" distutils command didn't work.
105
Guilherme Polob212b752008-09-04 11:21:31 +0000106- Issue #1658: tkinter changes dict size during iteration in both
107 tkinter.BaseWidget and tkinter.scrolledtext.ScrolledText.
108
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000109- The bsddb module (and therefore the dbm.bsd module) has been removed.
Gregory P. Smith451e99b2008-09-04 04:46:48 +0000110 It is now maintained outside of the standard library at
111 http://www.jcea.es/programacion/pybsddb.htm.
Benjamin Peterson6ba23322008-09-03 22:59:38 +0000112
Facundo Batistac469d4c2008-09-03 22:49:01 +0000113- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module
114 to the urlparse one. Added a DeprecationWarning in the old module, it
115 will be deprecated in the future.
116
Marc-André Lemburg7b2b1f92008-09-02 12:10:46 +0000117- Issue #3719: platform.architecture() fails if there are spaces in the
118 path to the Python binary.
119
Brett Cannonec92e182008-09-02 02:46:59 +0000120- Issue 3602: As part of the merge of r66135, make the parameters on
121 warnings.catch_warnings() keyword-only. Also remove a DeprecationWarning.
122
Benjamin Petersonb3085c92008-09-01 23:09:31 +0000123- The deprecation warnings for the camelCase threading API names were removed.
124
Jesse Noller338f5782008-09-03 18:22:19 +0000125- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing
126 SEM_VALUE_MAX.
127
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000128Extension Modules
129-----------------
130
Amaury Forgeot d'Arcd8976f12008-09-02 23:22:56 +0000131- Issue #2975: When compiling several extension modules with Visual Studio 2008
132 from the same python interpreter, some environment variables would grow
133 without limit.
134
Benjamin Peterson6784eb72008-08-23 20:32:27 +0000135- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by
136 exploitation of poor argument checking.
137
Jesus Cea6ba33292008-08-31 14:12:11 +0000138- bsddb code updated to version 4.7.3pre2. This code is the same than
139 Python 2.6 one, since the intention is to keep an unified 2.x/3.x codebase.
140 The Python code is automatically translated using "2to3". Please, do not
141 update this code in Python 3.0 by hand. Update the 2.6 one and then
142 do "2to3".
143
Benjamin Peterson791dc2f2008-09-05 23:27:15 +0000144- The _bytesio and _stringio modules are now compiled into the python binary.
145
Gregory P. Smith693fc462008-09-06 20:13:06 +0000146- Issue #3492 and #3790: Fixed the zlib module and zipimport module uses of
147 mutable bytearray objects where they should have been using immutable bytes.
148
Gregory P. Smith0a608fd2008-09-06 21:34:51 +0000149- Issue #3797: Fixed the dbm, marshal, mmap, ossaudiodev, & winreg modules to
150 return bytes objects instead of bytearray objects.
151
Gregory P. Smith693fc462008-09-06 20:13:06 +0000152
Neal Norwitz8f2f22a2008-08-24 20:59:23 +0000153Tools/Demos
154-----------
155
156- Fix Misc/gdbinit so it works.
157
Barry Warsaw8509df72008-08-21 03:02:47 +0000158
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000159What's new in Python 3.0b3?
160===========================
161
Barry Warsaw57c10582008-08-21 02:39:51 +0000162*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000163
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000164Core and Builtins
165-----------------
166
Benjamin Petersonbc74e5b2008-08-23 20:19:17 +0000167- Issue #3653: Fix a segfault when sys.excepthook was called with invalid
168 arguments.
169
Antoine Pitrou616d2852008-08-19 22:09:34 +0000170- Issue #2394: implement more of the memoryview API, with the caveat that
171 only one-dimensional contiguous buffers are supported and exercised right
172 now. Slicing, slice assignment and comparison (equality and inequality)
173 have been added. Also, the tolist() method has been implemented, but only
174 for byte buffers. Endly, the API has been updated to return bytes objects
175 wherever it used to return bytearrays.
176
Antoine Pitrouee58fa42008-08-19 18:22:14 +0000177- Issue #3560: clean up the new C PyMemoryView API so that naming is
178 internally consistent; add macros PyMemoryView_GET_BASE() and
179 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
180 without relying on a particular implementation; remove the ill-named
181 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
182
Thomas Hellerf5049fc2008-08-19 19:49:49 +0000183- ctypes function pointers that are COM methods have a boolean True
184 value again.
185
Antoine Pitrou9a2310d2008-07-25 22:39:39 +0000186- Issue #1819: function calls with several named parameters are now on
187 average 35% faster (as measured by pybench).
188
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000189- The undocumented C APIs PyUnicode_AsString() and
190 PyUnicode_AsStringAndSize() were made private to the interpreter, in
191 order to be able to refine their interfaces for Python 3.1.
192
193 If you need to access the UTF-8 representation of a Unicode object
194 as bytes string, please use PyUnicode_AsUTF8String() instead.
195
Antoine Pitrouaf14b792008-08-07 21:50:41 +0000196- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
197 to Python 3.0's stricter semantics which allow to avoid successive
198 reallocations of the result string (this also affects str.join()).
199
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +0000200
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000201Library
202-------
203
Hye-Shik Chang50d1f792008-08-23 08:03:03 +0000204- Issue #1276: Added temporary aliases for CJK Mac encodings to resolve
205 a build problem on MacOS with CJK locales. It adds four temporary
206 mappings to existing legacy codecs that are virtually compatible
207 with Mac encodings. They will be replaced by codecs correctly
208 implemented in 3.1.
209
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +0000210- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
211 "global name 'header' is not defined".
212
Antoine Pitroufd036452008-08-19 17:56:33 +0000213- Issue #2834: update the regular expression library to match the unicode
214 standards of py3k. In other words, mixing bytes and unicode strings
215 (be it as pattern, search string or replacement string) raises a TypeError.
216 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
217 and can be disabled by specifying a new re.ASCII flag; as for bytes
218 patterns, ASCII matching is the only option and trying to specify re.UNICODE
219 for such patterns raises a ValueError.
220
Guido van Rossum52dbbb92008-08-18 21:44:30 +0000221- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
222 Code contributed by Matt Giuca. quote() now encodes the input
223 before quoting, unquote() decodes after unquoting. There are
224 new arguments to change the encoding and errors settings.
225 There are also new APIs to skip the encode/decode steps.
226 [un]quote_plus() are also affected.
227
Nick Coghlan36f49522008-08-18 12:31:52 +0000228- Issue #2235: numbers.Number now blocks inheritance of the default id()
229 based hash because that hash mechanism is not correct for numeric types.
230 All concrete numeric types that inherit from Number (rather than just
231 registering with it) must explicitly provide a hash implementation in
232 order for their instances to be hashable.
233
Benjamin Peterson4cd6a952008-08-17 20:23:46 +0000234- Issue #2676: in the email package, content-type parsing was hanging on
235 pathological input because of quadratic or exponential behaviour of a
236 regular expression.
237
Antoine Pitrou87695762008-08-14 22:44:29 +0000238- Issue #3476: binary buffered reading through the new "io" library is now
239 thread-safe.
240
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +0000241- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
242 menu entries were not deleted.
243
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +0000244- Remove the TarFileCompat class from tarfile.py.
245
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +0000246- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
247 accepts the same parameters. It just checks that its first argument is an
248 integer.
249
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000250- Issue #3394: zipfile.writestr sets external attributes when passed a
251 file name rather than a ZipInfo instance, so files are extracted with
252 mode 0600 rather than 000 under Unix.
253
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000254- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
255 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000256
Martin v. Löwis371bb502008-08-16 13:02:57 +0000257Extension Modules
258-----------------
259
260- Bug #3542: Support Unicode strings in _msi module.
261
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000262What's new in Python 3.0b2?
263===========================
264
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000265*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000266
267Core and Builtins
268-----------------
269
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000270- Issue #3008: the float type has a new instance method 'float.hex'
271 and a new class method 'float.fromhex' to convert floating-point
272 numbers to and from hexadecimal strings, respectively.
273
Eric Smithd68af8f2008-07-16 00:15:35 +0000274- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
275 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
276
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000277- Issue #3280: like chr(), the "%c" format now accepts unicode code points
278 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
279 "narrow Unicode" builds, the result is a string of 2 code units, forming a
280 UTF-16 surrogate pair.
281
Georg Brandld52429f2008-07-04 15:55:02 +0000282- Issue #3282: str.isprintable() should return False for undefined
283 Unicode characters.
284
Martin v. Löwis029656f2008-06-30 04:06:08 +0000285- Issue #3236: Return small longs from PyLong_FromString.
286
Benjamin Petersone6528212008-07-15 15:32:09 +0000287- Exception tracebacks now support exception chaining.
288
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000289Library
290-------
291
Brett Cannonc2542e92008-07-25 18:19:20 +0000292- Removed the sunaudio module. Use sunau instead.
293
Thomas Heller47bc8092008-08-19 06:38:12 +0000294- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
295 api functions without holding the GIL, which could lead to a fatal
296 error when they failed.
297
298- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
299
Georg Brandl30704ea02008-07-23 15:07:12 +0000300- Removed "ast" function aliases from the parser module.
301
Thomas Heller15383a02008-07-15 19:46:52 +0000302- Issue #3313: Fixed a crash when a failed dlopen() call does not set
303 a valid dlerror() message.
304
Thomas Heller0261e1e2008-07-15 17:25:07 +0000305- Issue #3258: Fixed a crash when a ctypes POINTER type to an
306 incomplete structure was created.
307
Georg Brandl1abcbf82008-07-01 19:28:43 +0000308- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
309 argument now must be a bytes object in any case.
310
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000311- Issue #3145: help("modules whatever") failed when trying to load the source
312 code of every single module of the standard library, including invalid files
313 used in the test suite.
314
Georg Brandlbded4d32008-07-17 18:15:35 +0000315- The gettext library now consistently uses Unicode strings for message ids
316 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000317
Benjamin Petersone6528212008-07-15 15:32:09 +0000318- The traceback module has been expanded to handle chained exceptions.
319
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000320C API
321-----
322
323- Issue #3247: the function Py_FindMethod was removed. Modern types should
324 use the tp_methods slot instead.
325
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000326Tools/Demos
327-----------
328
Georg Brandl336341f2008-07-01 20:21:28 +0000329- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000330
Georg Brandl336341f2008-07-01 20:21:28 +0000331- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000332
333
Brett Cannon0d71ee72008-05-08 18:13:40 +0000334What's new in Python 3.0b1?
335===========================
336
Barry Warsawc1e689e2008-06-19 00:35:43 +0000337*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000338
339Core and Builtins
340-----------------
341
Brett Cannondb734912008-06-27 00:52:15 +0000342- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
343 argument being anything other than a dict or None. Also fixed a bug in error
344 handling when 'message' and 'category' were both set to None, triggering a
345 bus error.
346
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000347- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
348 holds the last (strong) reference to its referent.
349
Georg Brandl559e5d72008-06-11 18:37:52 +0000350- Issue #2630: implement PEP 3138. repr() now returns printable
351 Unicode characters unescaped, to get an ASCII-only representation
352 of an object use ascii().
353
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000354- Issue #1342: On windows, Python could not start when installed in a
355 directory with non-ascii characters.
356
Martin v. Löwis1a214512008-06-11 05:26:20 +0000357- Implement PEP 3121: new module initialization and finalization API.
358
Georg Brandle1b5ac62008-06-04 13:06:58 +0000359- Removed the already-defunct ``-t`` option.
360
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000361- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
362 unmarshalling many code objects, which happens when importing a
363 large .pyc file (~1000 functions).
364
Georg Brandl52b92cc2008-05-25 09:43:03 +0000365- Issue #2963: fix merging oversight that disabled method cache for
366 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000367
Georg Brandlc9b09532008-05-25 09:24:38 +0000368- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
369
Georg Brandl52b92cc2008-05-25 09:43:03 +0000370- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000371
Georg Brandl52b92cc2008-05-25 09:43:03 +0000372- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
373 code now allows any unicode string and returns a utf-8 encoded
374 buffer, just like the "s#" code already does. The "z" code was
375 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000376
Georg Brandl52b92cc2008-05-25 09:43:03 +0000377- Issue #2863: generators now have a ``gen.__name__`` attribute that
378 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
379 ``func.func_code.co_name``. The repr() of a generator now also
380 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000381
382- Issue #2831: enumerate() now has a ``start`` argument.
383
Georg Brandl52b92cc2008-05-25 09:43:03 +0000384- Issue #2801: fix bug in the float.is_integer method where a
385 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000386
Georg Brandl52b92cc2008-05-25 09:43:03 +0000387- The ``--with-toolbox-glue`` option (and the associated
388 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000389
Georg Brandl52b92cc2008-05-25 09:43:03 +0000390- Issue #2196: hasattr() now lets exceptions which do not inherit
391 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
392 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000393
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000394- #3021 Exception reraising sematics have been significantly improved. However,
395 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
396 code anymore.
397
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000398- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
399 removed.
400
Brett Cannon0d71ee72008-05-08 18:13:40 +0000401Extension Modules
402-----------------
403
Georg Brandl38feaf02008-05-25 07:45:51 +0000404- Renamed ``_winreg`` module to ``winreg``.
405
Georg Brandl52b92cc2008-05-25 09:43:03 +0000406- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
407 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000408
409- Support for Windows 9x has been removed from the winsound module.
410
Georg Brandl52b92cc2008-05-25 09:43:03 +0000411- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000412
Brett Cannon0d71ee72008-05-08 18:13:40 +0000413Library
414-------
415
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000416- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
417 symtable.Symbol have been removed.
418
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000419- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
420
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000421- a new ``urllib`` package was created. It consists of code from
422 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
423 modules have all been removed. The new package has five submodules:
424 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
425 ``urllib.error``, and ``urllib.robotparser``. The
426 ``urllib.request.urlopen()`` function uses the url opener from
427 ``urllib2``. (Note that the unittests have not been renamed for the
428 beta, but they will be renamed in the future.)
429
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000430- rfc822 has been removed in favor of the email package.
431
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000432- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000433
Barry Warsawf5019422008-06-12 02:42:00 +0000434- Patch #2849: Remove use of rfc822 module from standard library.
435
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000436- Added C optimized implementation of io.StringIO.
437
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000438- The ``pickle`` module is now automatically use an optimized C
439 implementation of Pickler and Unpickler when available. The
440 ``cPickle`` module is no longer needed.
441
Georg Brandl877b10a2008-06-01 21:25:55 +0000442- Removed the ``htmllib`` and ``sgmllib`` modules.
443
Georg Brandl61013952008-05-28 15:56:30 +0000444- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
445 been removed from ``http.cookies``.
446
Brett Cannona23810f2008-05-26 19:04:21 +0000447- The ``commands`` module has been removed. Its getoutput() and
448 getstatusoutput() functions have been moved to the ``subprocess`` module.
449
Georg Brandl3d5c4252008-05-26 18:03:26 +0000450- The ``http`` package was created; it contains the old ``httplib``
451 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
452 as ``http.cookiejar``, and the content of the three ``HTTPServer``
453 modules as ``http.server``.
454
Georg Brandl38eceaa2008-05-26 11:14:17 +0000455- The ``xmlrpc`` package was created; it contains the old
456 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
457 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000458 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000459
460- The ``dbm`` package was created, containing the old modules
461 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
462 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
463 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
464 as submodules.
465
Georg Brandl52b92cc2008-05-25 09:43:03 +0000466- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000467
Georg Brandl52b92cc2008-05-25 09:43:03 +0000468- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000469
Georg Brandl52b92cc2008-05-25 09:43:03 +0000470- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000471
Georg Brandl52b92cc2008-05-25 09:43:03 +0000472- Issue #2250: Exceptions raised during evaluation of names in
473 rlcompleter's ``Completer.complete()`` method are now caught and
474 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000475
Georg Brandl52b92cc2008-05-25 09:43:03 +0000476- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
477 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000478
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000479- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
480 large to fit in a C long. ldexp(x, n) now returns a zero (with
481 suitable sign) if n is large and negative; previously, it raised
482 OverflowError.
483
Georg Brandl52b92cc2008-05-25 09:43:03 +0000484- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000485
Georg Brandl52b92cc2008-05-25 09:43:03 +0000486- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000487
Georg Brandl52b92cc2008-05-25 09:43:03 +0000488- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000489
Georg Brandl52b92cc2008-05-25 09:43:03 +0000490- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000491
Georg Brandl52b92cc2008-05-25 09:43:03 +0000492- Fixed the ``__all__`` setting on ``collections`` to include
493 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000494
Brett Cannoncf3520c2008-05-11 22:47:58 +0000495- The sre module has been removed.
496
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000497- The Queue module has been renamed to queue.
498
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000499- The copy_reg module has been renamed to copyreg.
500
Brett Cannond8b61ee2008-05-11 03:00:26 +0000501- The mhlib module has been removed.
502
Brett Cannonbd474422008-05-10 22:42:14 +0000503- The ihooks module has been removed.
504
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000505- The fpformat module has been removed.
506
Brett Cannonf4fd9932008-05-10 21:11:46 +0000507- The dircache module has been removed.
508
Brett Cannond175b4c2008-05-10 03:19:54 +0000509- The Canvas module has been removed.
510
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000511- The Decimal module gained the magic methods __round__, __ceil__,
512 __floor__ and __trunc__, to give support for round, math.ceil,
513 math.floor and math.trunc.
514
Brett Cannon900ee3a2008-05-08 20:31:11 +0000515- The user module has been removed.
516
Brett Cannon34afe872008-05-08 20:31:44 +0000517- The mutex module has been removed.
518
Brett Cannon0d71ee72008-05-08 18:13:40 +0000519- The imputil module has been removed.
520
Georg Brandl52b92cc2008-05-25 09:43:03 +0000521- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000522
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000523- pdb gained the "until" command.
524
Georg Brandl52b92cc2008-05-25 09:43:03 +0000525- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000526
Georg Brandl32de7af2008-08-18 23:07:41 +0000527- The threading module API was renamed to be PEP 8 compliant. The
528 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000529
Georg Brandl294d5a92008-06-01 19:25:32 +0000530Tools/Demos
531-----------
532
533- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000534
Brett Cannon0d71ee72008-05-08 18:13:40 +0000535Build
536-----
537
538
Barry Warsaw66079cd2008-04-04 01:36:36 +0000539What's New in Python 3.0a5?
540===========================
541
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000542*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000543
544Core and Builtins
545-----------------
546
Georg Brandl52b92cc2008-05-25 09:43:03 +0000547- Fixed misbehaviour of PyLong_FromSsize_t on systems where
548 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000549
Georg Brandl52b92cc2008-05-25 09:43:03 +0000550- Issue #2221: Corrected a SystemError "error return without exception
551 set", when the code executed by exec() raises an exception, and
552 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000553
Georg Brandl52b92cc2008-05-25 09:43:03 +0000554- Bug #2565: The repr() of type objects now calls them 'class', not
555 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000556
Martin v. Löwis790465f2008-04-05 20:41:37 +0000557- The command line processing was converted to pass Unicode strings
558 through as unmodified as possible; as a consequence, the C API
559 related to command line arguments was changed to use wchar_t.
560
Georg Brandl52b92cc2008-05-25 09:43:03 +0000561- All backslashes in raw strings are interpreted literally. This
562 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000563
Barry Warsaw66079cd2008-04-04 01:36:36 +0000564Extension Modules
565-----------------
566
567Library
568-------
569
Georg Brandl52b92cc2008-05-25 09:43:03 +0000570- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000571
Thomas Hellere106dc32008-04-24 18:39:36 +0000572- Issue #2682: ctypes callback functions now longer contain a cyclic
573 reference to themselves.
574
Georg Brandl52b92cc2008-05-25 09:43:03 +0000575- Issue #2058: Remove the buf attribute and add __slots__ to the
576 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000577
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000578- Bug #2606: Avoid calling .sort() on a dict_keys object.
579
Thomas Hellerbff533b2008-04-04 19:53:14 +0000580- The bundled libffi copy is now in sync with the recently released
581 libffi3.0.5 version, apart from some small changes to
582 Modules/_ctypes/libffi/configure.ac.
583
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000584Build
585-----
586
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000587- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
588
Guido van Rossumdc21db32008-04-07 18:37:41 +0000589- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000590 accidentally overwriting a Python 2.x installation. Use "make
591 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000592
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000593- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
594 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000595
Georg Brandl52b92cc2008-05-25 09:43:03 +0000596
Barry Warsawa9d499d2008-03-01 18:38:07 +0000597What's New in Python 3.0a4?
598===========================
599
Barry Warsawbb5cd082008-04-02 23:33:27 +0000600*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000601
Martin v. Löwis25931462008-03-17 20:43:42 +0000602Core and Builtins
603-----------------
604
605- Bug #2301: Don't try decoding the source code into the original
606 encoding for syntax errors.
607
Martin v. Löwis92fab752008-03-08 10:40:41 +0000608Extension Modules
609-----------------
610
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000611- The dl module was removed, use the ctypes module instead.
612
Martin v. Löwis92fab752008-03-08 10:40:41 +0000613- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000614
Martin v. Löwis071ef772008-03-08 11:24:24 +0000615Library
616-------
617
Georg Brandl52b92cc2008-05-25 09:43:03 +0000618- The class distutils.commands.build_py.build_py_2to3 can be used as a
619 build_py replacement to automatically run 2to3 on modules that are
620 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000621
Guido van Rossumf4169812008-03-17 22:56:06 +0000622- A new pickle protocol (protocol 3) is added with explicit support
623 for bytes. This is the default protocol. It intentionally cannot
624 be unpickled by Python 2.x.
625
626- When a pickle written by Python 2.x contains an (8-bit) str
627 instance, this is now decoded to a (Unicode) str instance. The
628 encoding used to do this defaults to ASCII, but can be overridden
629 via two new keyword arguments to the Unpickler class. Previously
630 this would create bytes instances, which is usually wrong: str
631 instances are often used to pickle attribute names etc., and text is
632 more common than binary data anyway.
633
Martin v. Löwis071ef772008-03-08 11:24:24 +0000634- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000635 system doesn't support CODESET and LANG isn't set or doesn't allow
636 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000637
Georg Brandl52b92cc2008-05-25 09:43:03 +0000638- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
639 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000640
Georg Brandl52b92cc2008-05-25 09:43:03 +0000641- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
642 has been renamed tokenize and now works with bytes rather than
643 strings. A new detect_encoding function has been added for
644 determining source file encoding according to PEP-0263. Token
645 sequences returned by tokenize always start with an ENCODING token
646 which specifies the encoding used to decode the file. This token is
647 used to encode the output of untokenize back to bytes.
648
Barry Warsawa9d499d2008-03-01 18:38:07 +0000649
Christian Heimesbc873412007-12-08 22:11:32 +0000650What's New in Python 3.0a3?
651===========================
652
Barry Warsaw659fc422008-03-01 17:45:23 +0000653*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000654
655Core and Builtins
656-----------------
657
Georg Brandl52b92cc2008-05-25 09:43:03 +0000658- Issue #2282: io.TextIOWrapper was not overriding seekable() from
659 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000660
Georg Brandl52b92cc2008-05-25 09:43:03 +0000661- Issue #2115: Important speedup in setting __slot__ attributes. Also
662 prevent a possible crash: an Abstract Base Class would try to access
663 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000664
Georg Brandl52b92cc2008-05-25 09:43:03 +0000665- Fixed repr() and str() of complex numbers with infinity or nan as
666 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000667
Georg Brandl52b92cc2008-05-25 09:43:03 +0000668- Clear all free list during a gc.collect() of the highest generation
669 in order to allow pymalloc to free more arenas. Python may give back
670 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000671
Georg Brandl52b92cc2008-05-25 09:43:03 +0000672- Issue #2045: Fix an infinite recursion triggered when printing a
673 subclass of collections.defaultdict, if its default_factory is set
674 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000675
676- Fixed a minor memory leak in dictobject.c. The content of the free
677 list was not freed on interpreter shutdown.
678
Georg Brandl52b92cc2008-05-25 09:43:03 +0000679- Limit free list of method and builtin function objects to 256
680 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000681
Georg Brandl52b92cc2008-05-25 09:43:03 +0000682- Patch #1953: Added ``sys._compact_freelists()`` and the C API
683 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000684 to compact the internal free lists of pre-allocted ints and floats.
685
686- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000687 Python expected the return type int but the fork familie returns
688 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000689
Georg Brandl52b92cc2008-05-25 09:43:03 +0000690- Issue #1678380: Fix a bug that identifies 0j and -0j when they
691 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000692
Georg Brandl52b92cc2008-05-25 09:43:03 +0000693- Issue #2025: Added tuple.count() and tuple.index() methods to comply
694 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000695
Georg Brandl52b92cc2008-05-25 09:43:03 +0000696- Fixed multiple reinitialization of the Python interpreter. The small
697 int list in longobject.c has caused a seg fault during the third
698 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000699
Georg Brandl52b92cc2008-05-25 09:43:03 +0000700- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000701
Georg Brandl52b92cc2008-05-25 09:43:03 +0000702- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000703
Georg Brandl52b92cc2008-05-25 09:43:03 +0000704- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000705
Georg Brandl52b92cc2008-05-25 09:43:03 +0000706- map() no longer accepts None for the first argument. Use zip()
707 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000708
Facundo Batista2336bdd2008-01-19 19:12:01 +0000709- Issue #1769: Now int("- 1") is not allowed any more.
710
Georg Brandl52b92cc2008-05-25 09:43:03 +0000711- Object/longobject.c: long(float('nan')) raises an OverflowError
712 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000713
Georg Brandl52b92cc2008-05-25 09:43:03 +0000714- Issue #1762972: __file__ points to the source file instead of the
715 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000716
Guido van Rossumab078dd2008-01-06 00:09:11 +0000717- Issue #1393: object_richcompare() returns NotImplemented instead of
718 False if the objects aren't equal, to give the other side a chance.
719
Guido van Rossume239b002008-01-06 00:44:20 +0000720- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000721
Georg Brandl52b92cc2008-05-25 09:43:03 +0000722- Improve some exception messages when Windows fails to load an
723 extension module. Now we get for example '%1 is not a valid Win32
724 application' instead of 'error code 193'. Also use Unicode strings
725 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000726
Georg Brandl52b92cc2008-05-25 09:43:03 +0000727- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
728 Python C API has gained a new type *PyInstanceMethod_Type* and the
729 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
730 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000731
Georg Brandl52b92cc2008-05-25 09:43:03 +0000732- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
733 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
734 are now enough to print the corresponding list of objects considered
735 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000736
Georg Brandl52b92cc2008-05-25 09:43:03 +0000737- Issue #1573: Improper use of the keyword-only syntax makes the
738 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000739
Georg Brandl52b92cc2008-05-25 09:43:03 +0000740- Issue #1564: The set implementation should special-case PyUnicode
741 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000742
Guido van Rossumea6775b2008-02-21 20:16:31 +0000743- Patch #1031213: Decode source line in SyntaxErrors back to its
744 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000745
Christian Heimes09aaa882008-02-23 15:01:06 +0000746- inspect.getsource() includes the decorators again.
747
Guido van Rossumea6775b2008-02-21 20:16:31 +0000748- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
749 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000750
Georg Brandl52b92cc2008-05-25 09:43:03 +0000751- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
752 the first chunk fed to the decoder started with a BOM, but was
753 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000754
Christian Heimesbc873412007-12-08 22:11:32 +0000755Extension Modules
756-----------------
757
Georg Brandl52b92cc2008-05-25 09:43:03 +0000758- Code for itertools ifilter(), imap(), and izip() moved to bultins
759 and renamed to filter(), map(), and zip(). Also, renamed
760 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000761
Georg Brandl52b92cc2008-05-25 09:43:03 +0000762- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000763
Georg Brandl52b92cc2008-05-25 09:43:03 +0000764- Bug #2111: mmap segfaults when trying to write a block opened with
765 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000766
Georg Brandl52b92cc2008-05-25 09:43:03 +0000767- Issue #2063: correct order of utime and stime in os.times() result
768 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000769
Christian Heimesbc873412007-12-08 22:11:32 +0000770Library
771-------
772
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000773- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000774
Georg Brandl52b92cc2008-05-25 09:43:03 +0000775- Created new UserDict class in collections module. This one inherits
776 from and complies with the MutableMapping ABC. Also, moved
777 UserString and UserList to the collections module. The
778 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000779
Guido van Rossumea6775b2008-02-21 20:16:31 +0000780- Removed UserDict.DictMixin. Replaced all its uses with
781 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000782
Guido van Rossume239b002008-01-06 00:44:20 +0000783- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000784
Guido van Rossume239b002008-01-06 00:44:20 +0000785- Issue #1585: IDLE uses non-existent xrange() function.
786
787- Issue #1578: Problems in win_getpass.
788
Georg Brandl52d168a2008-01-07 18:10:24 +0000789Build
790-----
791
Georg Brandl52b92cc2008-05-25 09:43:03 +0000792- Renamed --enable-unicode configure flag to --with-wide-unicode,
793 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000794
Guido van Rossume239b002008-01-06 00:44:20 +0000795C API
796-----
797
798- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
799 Py_TYPE and Py_REFCNT.
800
Georg Brandl52b92cc2008-05-25 09:43:03 +0000801- New API PyImport_ImportModuleNoBlock(), works like
802 PyImport_ImportModule() but won't block on the import lock
803 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000804
Christian Heimesbc873412007-12-08 22:11:32 +0000805
Fred Drake0e474a82007-10-11 18:01:43 +0000806What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000807===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000808
Guido van Rossum99533a92007-12-06 05:07:41 +0000809*Release date: 07-Dec-2007*
810
811(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000812
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000813Core and Builtins
814-----------------
815
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000816- str8 now has the same construction signature as bytes.
817
Georg Brandl52b92cc2008-05-25 09:43:03 +0000818- Comparisons between str and str8 now return False/True for ==/!=.
819 sqlite3 returns str8 when recreating on object from it's __conform__
820 value. The struct module returns str8 for all string-related
821 formats. This was true before this change, but becomes more
822 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000823
Georg Brandl52b92cc2008-05-25 09:43:03 +0000824- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
825 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000826
827- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
828
829- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000830 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000831 `PyUnicode_DecodeFSDefault(char*)` was added.
832
Georg Brandl52b92cc2008-05-25 09:43:03 +0000833- io.open() and _fileio.FileIO have grown a new argument closefd. A
834 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000835
Georg Brandl52b92cc2008-05-25 09:43:03 +0000836- Added a new option -b to issues warnings (-bb for errors) about
837 certain operations between bytes/buffer and str like str(b'') and
838 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000839
Georg Brandl52b92cc2008-05-25 09:43:03 +0000840- The standards streams sys.stdin, stdout and stderr may be None when
841 the when the C runtime library returns an invalid file descriptor
842 for the streams (fileno(stdin) < 0). For now this happens only for
843 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000844
Christian Heimesbce52be2007-11-17 19:08:41 +0000845- Added PCbuild9 directory for VS 2008.
846
Georg Brandl52b92cc2008-05-25 09:43:03 +0000847- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
848 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000849
Georg Brandl52b92cc2008-05-25 09:43:03 +0000850- Unbound methods are gone for good. ClassObject.method returns an
851 ordinary function object, instance.method still returns a bound
852 method object. The API of bound methods is cleaned up, too. The
853 im_class attribute is removed and im_func + im_self are renamed to
854 __func__ and __self__. The factory PyMethod_New takes only func and
855 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000856
Georg Brandl52b92cc2008-05-25 09:43:03 +0000857- intobject.h is no longer included by Python.h. The remains were
858 moved to longobject.h. It still exists to define several aliases
859 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000860
Christian Heimesa37d4c62007-12-04 23:02:19 +0000861- Removed sys.maxint, use sys.maxsize instead.
862
Fred Drake0e474a82007-10-11 18:01:43 +0000863Extension Modules
864-----------------
865
866- The `hotshot` profiler has been removed; use `cProfile` instead.
867
Brett Cannone9fd2312007-10-12 19:18:19 +0000868Library
869-------
870
Georg Brandl52b92cc2008-05-25 09:43:03 +0000871- When loading an external file using testfile(), the passed-in
872 encoding argument was being ignored if __loader__ is defined and
873 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000874
Georg Brandl52b92cc2008-05-25 09:43:03 +0000875- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
876 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000877
Christian Heimesc9543e42007-11-28 08:28:28 +0000878- Removed the 'new' module.
879
Georg Brandl52b92cc2008-05-25 09:43:03 +0000880- Removed all types from the 'types' module that are easily accessable
881 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000882
Georg Brandl52d168a2008-01-07 18:10:24 +0000883
Guido van Rossum4405cf32007-08-30 17:16:55 +0000884What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000885==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000886
Guido van Rossum4405cf32007-08-30 17:16:55 +0000887*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000888
889Core and Builtins
890-----------------
891
Martin v. Löwis47383402007-08-15 07:32:56 +0000892- PEP 3131: Support non-ASCII identifiers.
893
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000894- PEP 3120: Change default encoding to UTF-8.
895
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000896- PEP 3123: Use proper C inheritance for PyObject.
897
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000898- Removed the __oct__ and __hex__ special methods and added a bin()
899 builtin function.
900
Georg Brandl52b92cc2008-05-25 09:43:03 +0000901- PEP 3127: octal literals now start with "0o". Old-style octal
902 literals are invalid. There are binary literals with a prefix of
903 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000904
Guido van Rossume7ba4952007-06-06 23:52:48 +0000905- None, True, False are now keywords.
906
Guido van Rossum29478ef2007-05-29 00:39:44 +0000907- PEP 3119: isinstance() and issubclass() can be overridden.
908
Guido van Rossumebe3e162007-05-17 18:20:34 +0000909- Remove BaseException.message.
910
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000911- Remove tuple parameter unpacking (PEP 3113).
912
Georg Brandl52b92cc2008-05-25 09:43:03 +0000913- Remove the f_restricted attribute from frames. This naturally leads
914 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000915
Georg Brandl52b92cc2008-05-25 09:43:03 +0000916- PEP 3132 was accepted. That means that you can do ``a, *b =
917 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000918
Georg Brandl52b92cc2008-05-25 09:43:03 +0000919- range() now returns an iterator rather than a list. Floats are not
920 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000921
Nick Coghlan650f0d02007-04-15 12:05:43 +0000922- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000923 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000924
Guido van Rossume27dc722007-03-27 22:37:34 +0000925- By default, != returns the opposite of ==, unless the latter returns
926 NotImplemented.
927
Georg Brandl52b92cc2008-05-25 09:43:03 +0000928- Patch #1680961: sys.exitfunc has been removed and replaced with a
929 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000930
Georg Brandl801dd732007-03-18 20:18:31 +0000931- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000932 keyword arg in the class statement, which can now use the full
933 syntax of a parameter list. Also, the metaclass can implement a
934 __prepare__ function which will be called to create the dictionary
935 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000936
Georg Brandl428f0642007-03-18 18:35:15 +0000937- The long-deprecated argument "pend" of PyFloat_FromString() has been
938 removed.
939
Georg Brandle32b4222007-03-10 22:13:27 +0000940- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000941 its argument, if it exists. If not, it will work like before. This
942 allows customizing the output of dir() in the presence of a
943 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000944
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000945- Removed support for __members__ and __methods__.
946
Georg Brandle32b4222007-03-10 22:13:27 +0000947- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000948
Georg Brandle32b4222007-03-10 22:13:27 +0000949- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000950 functionality formerly known as raw_input(); the name raw_input() is
951 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000952
Georg Brandl52b92cc2008-05-25 09:43:03 +0000953- Classes listed in an 'except' clause must inherit from
954 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000955
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000956- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000957 and .keys(), .items(), .values() return dict views, which behave
958 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000959
Guido van Rossum8b545362007-02-09 23:52:14 +0000960- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000961 'softspace' attribute of files is now gone (since print() doesn't
962 use it). A side effect of this change is that you can get
963 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000964
965 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000966 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000967
968 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000969
Brett Cannon398db8b2007-01-29 23:44:37 +0000970- PEP 3102: keyword-only arguments.
971
Georg Brandl52b92cc2008-05-25 09:43:03 +0000972- Int/Long unification is complete. The 'long' built-in type and
973 literals with trailing 'L' or 'l' have been removed. Performance
974 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000975
976- 'except E, V' must now be spelled as 'except E as V' and deletes V
977 at the end of the except clause; V must be a simple name.
978
Neal Norwitzc1505362006-12-28 06:47:50 +0000979- Added function annotations per PEP 3107.
980
Georg Brandl52b92cc2008-05-25 09:43:03 +0000981- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000982
983 >>> def f(x):
984 ... def inc():
985 ... nonlocal x
986 ... x += 1
987 ... return x
988 ... return inc
989 ...
990 >>> inc = f(0)
991 >>> inc()
992 1
993 >>> inc()
994 2
995
Georg Brandl66a796e2006-12-19 20:50:34 +0000996- Moved intern() to sys.intern().
997
998- exec is now a function.
999
1000- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +00001001
Neal Norwitz4886cc32006-08-21 17:06:07 +00001002- Classic classes are a thing of the past. All classes are new style.
1003
1004- Exceptions *must* derive from BaseException.
1005
1006- Integer division always returns a float. The -Q option is no more.
1007 All the following are gone:
1008 * PyNumber_Divide and PyNumber_InPlaceDivide
1009 * __div__, __rdiv__, and __idiv__
1010 * nb_divide, nb_inplace_divide
1011 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
1012 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
1013 if we want to re-use __div__ and friends. If we do, it will make
1014 it harder to write code for both 2.x and 3.x.)
1015
1016- 'as' and 'with' are keywords.
1017
1018- Absolute import is the default behavior for 'import foo' etc.
1019
Georg Brandl52b92cc2008-05-25 09:43:03 +00001020- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001021
Georg Brandl52b92cc2008-05-25 09:43:03 +00001022- Removed these Python builtins: apply(), callable(), coerce(),
1023 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +00001024
Georg Brandl52b92cc2008-05-25 09:43:03 +00001025- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +00001026
Georg Brandl52b92cc2008-05-25 09:43:03 +00001027- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001028
1029- Remove C API support for restricted execution.
1030
Guido van Rossumcf1be882007-08-30 22:07:17 +00001031- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +00001032 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +00001033 sequences of unequal length -- it now stops after the shortest one
1034 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001035
Georg Brandl52b92cc2008-05-25 09:43:03 +00001036- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001037
1038- Added class decorators per PEP 3129.
1039
1040
1041Extension Modules
1042-----------------
1043
Georg Brandl52b92cc2008-05-25 09:43:03 +00001044- Removed the imageop module. Obsolete long with its unit tests
1045 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001046
Georg Brandl52b92cc2008-05-25 09:43:03 +00001047- Removed these attributes from the operator module: div, idiv,
1048 __div__, __idiv__, isCallable, sequenceIncludes.
1049
1050- Removed these attributes from the sys module: exc_clear(), exc_type,
1051 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001052
1053
1054Library
1055-------
1056
Georg Brandl52b92cc2008-05-25 09:43:03 +00001057- Removed the compiler package. Use of the _ast module and (an
1058 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001059
Georg Brandl52b92cc2008-05-25 09:43:03 +00001060- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
1061 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
1062 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +00001063
Georg Brandl52b92cc2008-05-25 09:43:03 +00001064- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001065
Georg Brandl52b92cc2008-05-25 09:43:03 +00001066- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
1067 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
1068 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001069
Georg Brandl52b92cc2008-05-25 09:43:03 +00001070- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001071
Georg Brandl52b92cc2008-05-25 09:43:03 +00001072- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +00001073 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001074
Georg Brandl52b92cc2008-05-25 09:43:03 +00001075- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001076
Georg Brandl52b92cc2008-05-25 09:43:03 +00001077- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001078
1079- Patch #1680961: atexit has been reimplemented in C.
1080
Walter Dörwald41980ca2007-08-16 21:55:45 +00001081- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
1082
Guido van Rossumd59da4b2007-05-22 18:11:13 +00001083Build
1084-----
1085
1086C API
1087-----
1088
Georg Brandl52b92cc2008-05-25 09:43:03 +00001089- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001090
Georg Brandl52b92cc2008-05-25 09:43:03 +00001091- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
1092 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001093
Georg Brandl52b92cc2008-05-25 09:43:03 +00001094- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001095
Georg Brandl52b92cc2008-05-25 09:43:03 +00001096- Removed these macros: staticforward, statichere, PyArg_GetInt,
1097 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +00001098
Georg Brandl52b92cc2008-05-25 09:43:03 +00001099- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
1100 intintobjargproc, getreadbufferproc, getwritebufferproc,
1101 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001102
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001103Tests
1104-----
1105
Brett Cannone7a30f72008-03-03 03:36:27 +00001106- Removed test.testall as test.regrtest replaces it.
1107
Brett Cannonced04e02005-02-13 22:53:22 +00001108Documentation
1109-------------
1110
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001111Mac
1112---
1113
Georg Brandl52b92cc2008-05-25 09:43:03 +00001114- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +00001115
Guido van Rossum845702c2007-08-30 18:44:53 +00001116Platforms
1117---------
1118
1119- Support for BeOS and AtheOS was removed (according to PEP 11).
1120
1121- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
1122
Raymond Hettinger4901a1f2004-12-02 08:59:14 +00001123Tools/Demos
1124-----------
1125
Georg Brandl52b92cc2008-05-25 09:43:03 +00001126
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001127**(For information about older versions, consult the HISTORY file.)**