blob: 89ffdc1a07da2830b2a927e1cc00a959cd88a117 [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
15Library
16-------
17
18
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000019What's new in Python 3.0b3?
20===========================
21
Barry Warsaw57c10582008-08-21 02:39:51 +000022*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000023
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000024Core and Builtins
25-----------------
26
Antoine Pitrou616d2852008-08-19 22:09:34 +000027- Issue #2394: implement more of the memoryview API, with the caveat that
28 only one-dimensional contiguous buffers are supported and exercised right
29 now. Slicing, slice assignment and comparison (equality and inequality)
30 have been added. Also, the tolist() method has been implemented, but only
31 for byte buffers. Endly, the API has been updated to return bytes objects
32 wherever it used to return bytearrays.
33
Antoine Pitrouee58fa42008-08-19 18:22:14 +000034- Issue #3560: clean up the new C PyMemoryView API so that naming is
35 internally consistent; add macros PyMemoryView_GET_BASE() and
36 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
37 without relying on a particular implementation; remove the ill-named
38 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
39
Thomas Hellerf5049fc2008-08-19 19:49:49 +000040- ctypes function pointers that are COM methods have a boolean True
41 value again.
42
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000043- Issue #1819: function calls with several named parameters are now on
44 average 35% faster (as measured by pybench).
45
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +000046- The undocumented C APIs PyUnicode_AsString() and
47 PyUnicode_AsStringAndSize() were made private to the interpreter, in
48 order to be able to refine their interfaces for Python 3.1.
49
50 If you need to access the UTF-8 representation of a Unicode object
51 as bytes string, please use PyUnicode_AsUTF8String() instead.
52
Antoine Pitrouaf14b792008-08-07 21:50:41 +000053- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
54 to Python 3.0's stricter semantics which allow to avoid successive
55 reallocations of the result string (this also affects str.join()).
56
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +000057
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000058Library
59-------
60
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +000061- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
62 "global name 'header' is not defined".
63
Antoine Pitroufd036452008-08-19 17:56:33 +000064- Issue #2834: update the regular expression library to match the unicode
65 standards of py3k. In other words, mixing bytes and unicode strings
66 (be it as pattern, search string or replacement string) raises a TypeError.
67 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
68 and can be disabled by specifying a new re.ASCII flag; as for bytes
69 patterns, ASCII matching is the only option and trying to specify re.UNICODE
70 for such patterns raises a ValueError.
71
Guido van Rossum52dbbb92008-08-18 21:44:30 +000072- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
73 Code contributed by Matt Giuca. quote() now encodes the input
74 before quoting, unquote() decodes after unquoting. There are
75 new arguments to change the encoding and errors settings.
76 There are also new APIs to skip the encode/decode steps.
77 [un]quote_plus() are also affected.
78
Nick Coghlan36f49522008-08-18 12:31:52 +000079- Issue #2235: numbers.Number now blocks inheritance of the default id()
80 based hash because that hash mechanism is not correct for numeric types.
81 All concrete numeric types that inherit from Number (rather than just
82 registering with it) must explicitly provide a hash implementation in
83 order for their instances to be hashable.
84
Benjamin Peterson4cd6a952008-08-17 20:23:46 +000085- Issue #2676: in the email package, content-type parsing was hanging on
86 pathological input because of quadratic or exponential behaviour of a
87 regular expression.
88
Antoine Pitrou87695762008-08-14 22:44:29 +000089- Issue #3476: binary buffered reading through the new "io" library is now
90 thread-safe.
91
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +000092- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
93 menu entries were not deleted.
94
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +000095- Remove the TarFileCompat class from tarfile.py.
96
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +000097- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
98 accepts the same parameters. It just checks that its first argument is an
99 integer.
100
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000101- Issue #3394: zipfile.writestr sets external attributes when passed a
102 file name rather than a ZipInfo instance, so files are extracted with
103 mode 0600 rather than 000 under Unix.
104
Antoine Pitrouc66f9092008-07-28 19:46:11 +0000105- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
106 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000107
Martin v. Löwis371bb502008-08-16 13:02:57 +0000108Extension Modules
109-----------------
110
111- Bug #3542: Support Unicode strings in _msi module.
112
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000113What's new in Python 3.0b2?
114===========================
115
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000116*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000117
118Core and Builtins
119-----------------
120
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000121- Issue #3008: the float type has a new instance method 'float.hex'
122 and a new class method 'float.fromhex' to convert floating-point
123 numbers to and from hexadecimal strings, respectively.
124
Eric Smithd68af8f2008-07-16 00:15:35 +0000125- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
126 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
127
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000128- Issue #3280: like chr(), the "%c" format now accepts unicode code points
129 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
130 "narrow Unicode" builds, the result is a string of 2 code units, forming a
131 UTF-16 surrogate pair.
132
Georg Brandld52429f2008-07-04 15:55:02 +0000133- Issue #3282: str.isprintable() should return False for undefined
134 Unicode characters.
135
Martin v. Löwis029656f2008-06-30 04:06:08 +0000136- Issue #3236: Return small longs from PyLong_FromString.
137
Benjamin Petersone6528212008-07-15 15:32:09 +0000138- Exception tracebacks now support exception chaining.
139
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000140Library
141-------
142
Brett Cannonc2542e92008-07-25 18:19:20 +0000143- Removed the sunaudio module. Use sunau instead.
144
Thomas Heller47bc8092008-08-19 06:38:12 +0000145- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
146 api functions without holding the GIL, which could lead to a fatal
147 error when they failed.
148
149- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
150
Georg Brandl30704ea02008-07-23 15:07:12 +0000151- Removed "ast" function aliases from the parser module.
152
Thomas Heller15383a02008-07-15 19:46:52 +0000153- Issue #3313: Fixed a crash when a failed dlopen() call does not set
154 a valid dlerror() message.
155
Thomas Heller0261e1e2008-07-15 17:25:07 +0000156- Issue #3258: Fixed a crash when a ctypes POINTER type to an
157 incomplete structure was created.
158
Georg Brandl1abcbf82008-07-01 19:28:43 +0000159- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
160 argument now must be a bytes object in any case.
161
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000162- Issue #3145: help("modules whatever") failed when trying to load the source
163 code of every single module of the standard library, including invalid files
164 used in the test suite.
165
Georg Brandlbded4d32008-07-17 18:15:35 +0000166- The gettext library now consistently uses Unicode strings for message ids
167 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000168
Benjamin Petersone6528212008-07-15 15:32:09 +0000169- The traceback module has been expanded to handle chained exceptions.
170
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000171C API
172-----
173
174- Issue #3247: the function Py_FindMethod was removed. Modern types should
175 use the tp_methods slot instead.
176
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000177Tools/Demos
178-----------
179
Georg Brandl336341f2008-07-01 20:21:28 +0000180- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000181
Georg Brandl336341f2008-07-01 20:21:28 +0000182- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000183
184
Brett Cannon0d71ee72008-05-08 18:13:40 +0000185What's new in Python 3.0b1?
186===========================
187
Barry Warsawc1e689e2008-06-19 00:35:43 +0000188*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000189
190Core and Builtins
191-----------------
192
Brett Cannondb734912008-06-27 00:52:15 +0000193- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
194 argument being anything other than a dict or None. Also fixed a bug in error
195 handling when 'message' and 'category' were both set to None, triggering a
196 bus error.
197
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000198- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
199 holds the last (strong) reference to its referent.
200
Georg Brandl559e5d72008-06-11 18:37:52 +0000201- Issue #2630: implement PEP 3138. repr() now returns printable
202 Unicode characters unescaped, to get an ASCII-only representation
203 of an object use ascii().
204
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000205- Issue #1342: On windows, Python could not start when installed in a
206 directory with non-ascii characters.
207
Martin v. Löwis1a214512008-06-11 05:26:20 +0000208- Implement PEP 3121: new module initialization and finalization API.
209
Georg Brandle1b5ac62008-06-04 13:06:58 +0000210- Removed the already-defunct ``-t`` option.
211
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000212- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
213 unmarshalling many code objects, which happens when importing a
214 large .pyc file (~1000 functions).
215
Georg Brandl52b92cc2008-05-25 09:43:03 +0000216- Issue #2963: fix merging oversight that disabled method cache for
217 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000218
Georg Brandlc9b09532008-05-25 09:24:38 +0000219- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
220
Georg Brandl52b92cc2008-05-25 09:43:03 +0000221- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000222
Georg Brandl52b92cc2008-05-25 09:43:03 +0000223- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
224 code now allows any unicode string and returns a utf-8 encoded
225 buffer, just like the "s#" code already does. The "z" code was
226 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000227
Georg Brandl52b92cc2008-05-25 09:43:03 +0000228- Issue #2863: generators now have a ``gen.__name__`` attribute that
229 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
230 ``func.func_code.co_name``. The repr() of a generator now also
231 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000232
233- Issue #2831: enumerate() now has a ``start`` argument.
234
Georg Brandl52b92cc2008-05-25 09:43:03 +0000235- Issue #2801: fix bug in the float.is_integer method where a
236 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000237
Georg Brandl52b92cc2008-05-25 09:43:03 +0000238- The ``--with-toolbox-glue`` option (and the associated
239 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000240
Georg Brandl52b92cc2008-05-25 09:43:03 +0000241- Issue #2196: hasattr() now lets exceptions which do not inherit
242 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
243 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000244
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000245- #3021 Exception reraising sematics have been significantly improved. However,
246 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
247 code anymore.
248
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000249- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
250 removed.
251
Brett Cannon0d71ee72008-05-08 18:13:40 +0000252Extension Modules
253-----------------
254
Georg Brandl38feaf02008-05-25 07:45:51 +0000255- Renamed ``_winreg`` module to ``winreg``.
256
Georg Brandl52b92cc2008-05-25 09:43:03 +0000257- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
258 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000259
260- Support for Windows 9x has been removed from the winsound module.
261
Georg Brandl52b92cc2008-05-25 09:43:03 +0000262- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000263
Brett Cannon0d71ee72008-05-08 18:13:40 +0000264Library
265-------
266
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000267- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
268 symtable.Symbol have been removed.
269
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000270- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
271
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000272- a new ``urllib`` package was created. It consists of code from
273 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
274 modules have all been removed. The new package has five submodules:
275 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
276 ``urllib.error``, and ``urllib.robotparser``. The
277 ``urllib.request.urlopen()`` function uses the url opener from
278 ``urllib2``. (Note that the unittests have not been renamed for the
279 beta, but they will be renamed in the future.)
280
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000281- rfc822 has been removed in favor of the email package.
282
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000283- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000284
Barry Warsawf5019422008-06-12 02:42:00 +0000285- Patch #2849: Remove use of rfc822 module from standard library.
286
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000287- Added C optimized implementation of io.StringIO.
288
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000289- The ``pickle`` module is now automatically use an optimized C
290 implementation of Pickler and Unpickler when available. The
291 ``cPickle`` module is no longer needed.
292
Georg Brandl877b10a2008-06-01 21:25:55 +0000293- Removed the ``htmllib`` and ``sgmllib`` modules.
294
Georg Brandl61013952008-05-28 15:56:30 +0000295- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
296 been removed from ``http.cookies``.
297
Brett Cannona23810f2008-05-26 19:04:21 +0000298- The ``commands`` module has been removed. Its getoutput() and
299 getstatusoutput() functions have been moved to the ``subprocess`` module.
300
Georg Brandl3d5c4252008-05-26 18:03:26 +0000301- The ``http`` package was created; it contains the old ``httplib``
302 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
303 as ``http.cookiejar``, and the content of the three ``HTTPServer``
304 modules as ``http.server``.
305
Georg Brandl38eceaa2008-05-26 11:14:17 +0000306- The ``xmlrpc`` package was created; it contains the old
307 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
308 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000309 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000310
311- The ``dbm`` package was created, containing the old modules
312 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
313 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
314 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
315 as submodules.
316
Georg Brandl52b92cc2008-05-25 09:43:03 +0000317- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000318
Georg Brandl52b92cc2008-05-25 09:43:03 +0000319- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000320
Georg Brandl52b92cc2008-05-25 09:43:03 +0000321- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000322
Georg Brandl52b92cc2008-05-25 09:43:03 +0000323- Issue #2250: Exceptions raised during evaluation of names in
324 rlcompleter's ``Completer.complete()`` method are now caught and
325 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000326
Georg Brandl52b92cc2008-05-25 09:43:03 +0000327- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
328 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000329
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000330- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
331 large to fit in a C long. ldexp(x, n) now returns a zero (with
332 suitable sign) if n is large and negative; previously, it raised
333 OverflowError.
334
Georg Brandl52b92cc2008-05-25 09:43:03 +0000335- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000336
Georg Brandl52b92cc2008-05-25 09:43:03 +0000337- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000338
Georg Brandl52b92cc2008-05-25 09:43:03 +0000339- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000340
Georg Brandl52b92cc2008-05-25 09:43:03 +0000341- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000342
Georg Brandl52b92cc2008-05-25 09:43:03 +0000343- Fixed the ``__all__`` setting on ``collections`` to include
344 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000345
Brett Cannoncf3520c2008-05-11 22:47:58 +0000346- The sre module has been removed.
347
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000348- The Queue module has been renamed to queue.
349
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000350- The copy_reg module has been renamed to copyreg.
351
Brett Cannond8b61ee2008-05-11 03:00:26 +0000352- The mhlib module has been removed.
353
Brett Cannonbd474422008-05-10 22:42:14 +0000354- The ihooks module has been removed.
355
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000356- The fpformat module has been removed.
357
Brett Cannonf4fd9932008-05-10 21:11:46 +0000358- The dircache module has been removed.
359
Brett Cannond175b4c2008-05-10 03:19:54 +0000360- The Canvas module has been removed.
361
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000362- The Decimal module gained the magic methods __round__, __ceil__,
363 __floor__ and __trunc__, to give support for round, math.ceil,
364 math.floor and math.trunc.
365
Brett Cannon900ee3a2008-05-08 20:31:11 +0000366- The user module has been removed.
367
Brett Cannon34afe872008-05-08 20:31:44 +0000368- The mutex module has been removed.
369
Brett Cannon0d71ee72008-05-08 18:13:40 +0000370- The imputil module has been removed.
371
Georg Brandl52b92cc2008-05-25 09:43:03 +0000372- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000373
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000374- pdb gained the "until" command.
375
Georg Brandl52b92cc2008-05-25 09:43:03 +0000376- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000377
Georg Brandl32de7af2008-08-18 23:07:41 +0000378- The threading module API was renamed to be PEP 8 compliant. The
379 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000380
Georg Brandl294d5a92008-06-01 19:25:32 +0000381Tools/Demos
382-----------
383
384- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000385
Brett Cannon0d71ee72008-05-08 18:13:40 +0000386Build
387-----
388
389
Barry Warsaw66079cd2008-04-04 01:36:36 +0000390What's New in Python 3.0a5?
391===========================
392
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000393*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000394
395Core and Builtins
396-----------------
397
Georg Brandl52b92cc2008-05-25 09:43:03 +0000398- Fixed misbehaviour of PyLong_FromSsize_t on systems where
399 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000400
Georg Brandl52b92cc2008-05-25 09:43:03 +0000401- Issue #2221: Corrected a SystemError "error return without exception
402 set", when the code executed by exec() raises an exception, and
403 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000404
Georg Brandl52b92cc2008-05-25 09:43:03 +0000405- Bug #2565: The repr() of type objects now calls them 'class', not
406 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000407
Martin v. Löwis790465f2008-04-05 20:41:37 +0000408- The command line processing was converted to pass Unicode strings
409 through as unmodified as possible; as a consequence, the C API
410 related to command line arguments was changed to use wchar_t.
411
Georg Brandl52b92cc2008-05-25 09:43:03 +0000412- All backslashes in raw strings are interpreted literally. This
413 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000414
Barry Warsaw66079cd2008-04-04 01:36:36 +0000415Extension Modules
416-----------------
417
418Library
419-------
420
Georg Brandl52b92cc2008-05-25 09:43:03 +0000421- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000422
Thomas Hellere106dc32008-04-24 18:39:36 +0000423- Issue #2682: ctypes callback functions now longer contain a cyclic
424 reference to themselves.
425
Georg Brandl52b92cc2008-05-25 09:43:03 +0000426- Issue #2058: Remove the buf attribute and add __slots__ to the
427 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000428
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000429- Bug #2606: Avoid calling .sort() on a dict_keys object.
430
Thomas Hellerbff533b2008-04-04 19:53:14 +0000431- The bundled libffi copy is now in sync with the recently released
432 libffi3.0.5 version, apart from some small changes to
433 Modules/_ctypes/libffi/configure.ac.
434
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000435Build
436-----
437
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000438- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
439
Guido van Rossumdc21db32008-04-07 18:37:41 +0000440- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000441 accidentally overwriting a Python 2.x installation. Use "make
442 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000443
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000444- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
445 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000446
Georg Brandl52b92cc2008-05-25 09:43:03 +0000447
Barry Warsawa9d499d2008-03-01 18:38:07 +0000448What's New in Python 3.0a4?
449===========================
450
Barry Warsawbb5cd082008-04-02 23:33:27 +0000451*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000452
Martin v. Löwis25931462008-03-17 20:43:42 +0000453Core and Builtins
454-----------------
455
456- Bug #2301: Don't try decoding the source code into the original
457 encoding for syntax errors.
458
Martin v. Löwis92fab752008-03-08 10:40:41 +0000459Extension Modules
460-----------------
461
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000462- The dl module was removed, use the ctypes module instead.
463
Martin v. Löwis92fab752008-03-08 10:40:41 +0000464- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000465
Martin v. Löwis071ef772008-03-08 11:24:24 +0000466Library
467-------
468
Georg Brandl52b92cc2008-05-25 09:43:03 +0000469- The class distutils.commands.build_py.build_py_2to3 can be used as a
470 build_py replacement to automatically run 2to3 on modules that are
471 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000472
Guido van Rossumf4169812008-03-17 22:56:06 +0000473- A new pickle protocol (protocol 3) is added with explicit support
474 for bytes. This is the default protocol. It intentionally cannot
475 be unpickled by Python 2.x.
476
477- When a pickle written by Python 2.x contains an (8-bit) str
478 instance, this is now decoded to a (Unicode) str instance. The
479 encoding used to do this defaults to ASCII, but can be overridden
480 via two new keyword arguments to the Unpickler class. Previously
481 this would create bytes instances, which is usually wrong: str
482 instances are often used to pickle attribute names etc., and text is
483 more common than binary data anyway.
484
Martin v. Löwis071ef772008-03-08 11:24:24 +0000485- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000486 system doesn't support CODESET and LANG isn't set or doesn't allow
487 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000488
Georg Brandl52b92cc2008-05-25 09:43:03 +0000489- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
490 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000491
Georg Brandl52b92cc2008-05-25 09:43:03 +0000492- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
493 has been renamed tokenize and now works with bytes rather than
494 strings. A new detect_encoding function has been added for
495 determining source file encoding according to PEP-0263. Token
496 sequences returned by tokenize always start with an ENCODING token
497 which specifies the encoding used to decode the file. This token is
498 used to encode the output of untokenize back to bytes.
499
Barry Warsawa9d499d2008-03-01 18:38:07 +0000500
Christian Heimesbc873412007-12-08 22:11:32 +0000501What's New in Python 3.0a3?
502===========================
503
Barry Warsaw659fc422008-03-01 17:45:23 +0000504*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000505
506Core and Builtins
507-----------------
508
Georg Brandl52b92cc2008-05-25 09:43:03 +0000509- Issue #2282: io.TextIOWrapper was not overriding seekable() from
510 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000511
Georg Brandl52b92cc2008-05-25 09:43:03 +0000512- Issue #2115: Important speedup in setting __slot__ attributes. Also
513 prevent a possible crash: an Abstract Base Class would try to access
514 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000515
Georg Brandl52b92cc2008-05-25 09:43:03 +0000516- Fixed repr() and str() of complex numbers with infinity or nan as
517 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000518
Georg Brandl52b92cc2008-05-25 09:43:03 +0000519- Clear all free list during a gc.collect() of the highest generation
520 in order to allow pymalloc to free more arenas. Python may give back
521 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000522
Georg Brandl52b92cc2008-05-25 09:43:03 +0000523- Issue #2045: Fix an infinite recursion triggered when printing a
524 subclass of collections.defaultdict, if its default_factory is set
525 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000526
527- Fixed a minor memory leak in dictobject.c. The content of the free
528 list was not freed on interpreter shutdown.
529
Georg Brandl52b92cc2008-05-25 09:43:03 +0000530- Limit free list of method and builtin function objects to 256
531 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000532
Georg Brandl52b92cc2008-05-25 09:43:03 +0000533- Patch #1953: Added ``sys._compact_freelists()`` and the C API
534 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000535 to compact the internal free lists of pre-allocted ints and floats.
536
537- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000538 Python expected the return type int but the fork familie returns
539 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000540
Georg Brandl52b92cc2008-05-25 09:43:03 +0000541- Issue #1678380: Fix a bug that identifies 0j and -0j when they
542 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000543
Georg Brandl52b92cc2008-05-25 09:43:03 +0000544- Issue #2025: Added tuple.count() and tuple.index() methods to comply
545 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000546
Georg Brandl52b92cc2008-05-25 09:43:03 +0000547- Fixed multiple reinitialization of the Python interpreter. The small
548 int list in longobject.c has caused a seg fault during the third
549 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000550
Georg Brandl52b92cc2008-05-25 09:43:03 +0000551- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000552
Georg Brandl52b92cc2008-05-25 09:43:03 +0000553- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000554
Georg Brandl52b92cc2008-05-25 09:43:03 +0000555- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000556
Georg Brandl52b92cc2008-05-25 09:43:03 +0000557- map() no longer accepts None for the first argument. Use zip()
558 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000559
Facundo Batista2336bdd2008-01-19 19:12:01 +0000560- Issue #1769: Now int("- 1") is not allowed any more.
561
Georg Brandl52b92cc2008-05-25 09:43:03 +0000562- Object/longobject.c: long(float('nan')) raises an OverflowError
563 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000564
Georg Brandl52b92cc2008-05-25 09:43:03 +0000565- Issue #1762972: __file__ points to the source file instead of the
566 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000567
Guido van Rossumab078dd2008-01-06 00:09:11 +0000568- Issue #1393: object_richcompare() returns NotImplemented instead of
569 False if the objects aren't equal, to give the other side a chance.
570
Guido van Rossume239b002008-01-06 00:44:20 +0000571- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000572
Georg Brandl52b92cc2008-05-25 09:43:03 +0000573- Improve some exception messages when Windows fails to load an
574 extension module. Now we get for example '%1 is not a valid Win32
575 application' instead of 'error code 193'. Also use Unicode strings
576 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000577
Georg Brandl52b92cc2008-05-25 09:43:03 +0000578- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
579 Python C API has gained a new type *PyInstanceMethod_Type* and the
580 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
581 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000582
Georg Brandl52b92cc2008-05-25 09:43:03 +0000583- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
584 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
585 are now enough to print the corresponding list of objects considered
586 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000587
Georg Brandl52b92cc2008-05-25 09:43:03 +0000588- Issue #1573: Improper use of the keyword-only syntax makes the
589 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000590
Georg Brandl52b92cc2008-05-25 09:43:03 +0000591- Issue #1564: The set implementation should special-case PyUnicode
592 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000593
Guido van Rossumea6775b2008-02-21 20:16:31 +0000594- Patch #1031213: Decode source line in SyntaxErrors back to its
595 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000596
Christian Heimes09aaa882008-02-23 15:01:06 +0000597- inspect.getsource() includes the decorators again.
598
Guido van Rossumea6775b2008-02-21 20:16:31 +0000599- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
600 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000601
Georg Brandl52b92cc2008-05-25 09:43:03 +0000602- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
603 the first chunk fed to the decoder started with a BOM, but was
604 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000605
Christian Heimesbc873412007-12-08 22:11:32 +0000606Extension Modules
607-----------------
608
Georg Brandl52b92cc2008-05-25 09:43:03 +0000609- Code for itertools ifilter(), imap(), and izip() moved to bultins
610 and renamed to filter(), map(), and zip(). Also, renamed
611 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000612
Georg Brandl52b92cc2008-05-25 09:43:03 +0000613- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000614
Georg Brandl52b92cc2008-05-25 09:43:03 +0000615- Bug #2111: mmap segfaults when trying to write a block opened with
616 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000617
Georg Brandl52b92cc2008-05-25 09:43:03 +0000618- Issue #2063: correct order of utime and stime in os.times() result
619 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000620
Christian Heimesbc873412007-12-08 22:11:32 +0000621Library
622-------
623
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000624- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000625
Georg Brandl52b92cc2008-05-25 09:43:03 +0000626- Created new UserDict class in collections module. This one inherits
627 from and complies with the MutableMapping ABC. Also, moved
628 UserString and UserList to the collections module. The
629 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000630
Guido van Rossumea6775b2008-02-21 20:16:31 +0000631- Removed UserDict.DictMixin. Replaced all its uses with
632 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000633
Guido van Rossume239b002008-01-06 00:44:20 +0000634- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000635
Guido van Rossume239b002008-01-06 00:44:20 +0000636- Issue #1585: IDLE uses non-existent xrange() function.
637
638- Issue #1578: Problems in win_getpass.
639
Georg Brandl52d168a2008-01-07 18:10:24 +0000640Build
641-----
642
Georg Brandl52b92cc2008-05-25 09:43:03 +0000643- Renamed --enable-unicode configure flag to --with-wide-unicode,
644 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000645
Guido van Rossume239b002008-01-06 00:44:20 +0000646C API
647-----
648
649- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
650 Py_TYPE and Py_REFCNT.
651
Georg Brandl52b92cc2008-05-25 09:43:03 +0000652- New API PyImport_ImportModuleNoBlock(), works like
653 PyImport_ImportModule() but won't block on the import lock
654 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000655
Christian Heimesbc873412007-12-08 22:11:32 +0000656
Fred Drake0e474a82007-10-11 18:01:43 +0000657What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000658===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000659
Guido van Rossum99533a92007-12-06 05:07:41 +0000660*Release date: 07-Dec-2007*
661
662(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000663
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000664Core and Builtins
665-----------------
666
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000667- str8 now has the same construction signature as bytes.
668
Georg Brandl52b92cc2008-05-25 09:43:03 +0000669- Comparisons between str and str8 now return False/True for ==/!=.
670 sqlite3 returns str8 when recreating on object from it's __conform__
671 value. The struct module returns str8 for all string-related
672 formats. This was true before this change, but becomes more
673 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000674
Georg Brandl52b92cc2008-05-25 09:43:03 +0000675- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
676 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000677
678- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
679
680- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000681 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000682 `PyUnicode_DecodeFSDefault(char*)` was added.
683
Georg Brandl52b92cc2008-05-25 09:43:03 +0000684- io.open() and _fileio.FileIO have grown a new argument closefd. A
685 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000686
Georg Brandl52b92cc2008-05-25 09:43:03 +0000687- Added a new option -b to issues warnings (-bb for errors) about
688 certain operations between bytes/buffer and str like str(b'') and
689 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000690
Georg Brandl52b92cc2008-05-25 09:43:03 +0000691- The standards streams sys.stdin, stdout and stderr may be None when
692 the when the C runtime library returns an invalid file descriptor
693 for the streams (fileno(stdin) < 0). For now this happens only for
694 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000695
Christian Heimesbce52be2007-11-17 19:08:41 +0000696- Added PCbuild9 directory for VS 2008.
697
Georg Brandl52b92cc2008-05-25 09:43:03 +0000698- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
699 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000700
Georg Brandl52b92cc2008-05-25 09:43:03 +0000701- Unbound methods are gone for good. ClassObject.method returns an
702 ordinary function object, instance.method still returns a bound
703 method object. The API of bound methods is cleaned up, too. The
704 im_class attribute is removed and im_func + im_self are renamed to
705 __func__ and __self__. The factory PyMethod_New takes only func and
706 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000707
Georg Brandl52b92cc2008-05-25 09:43:03 +0000708- intobject.h is no longer included by Python.h. The remains were
709 moved to longobject.h. It still exists to define several aliases
710 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000711
Christian Heimesa37d4c62007-12-04 23:02:19 +0000712- Removed sys.maxint, use sys.maxsize instead.
713
Fred Drake0e474a82007-10-11 18:01:43 +0000714Extension Modules
715-----------------
716
717- The `hotshot` profiler has been removed; use `cProfile` instead.
718
Brett Cannone9fd2312007-10-12 19:18:19 +0000719Library
720-------
721
Georg Brandl52b92cc2008-05-25 09:43:03 +0000722- When loading an external file using testfile(), the passed-in
723 encoding argument was being ignored if __loader__ is defined and
724 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000725
Georg Brandl52b92cc2008-05-25 09:43:03 +0000726- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
727 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000728
Christian Heimesc9543e42007-11-28 08:28:28 +0000729- Removed the 'new' module.
730
Georg Brandl52b92cc2008-05-25 09:43:03 +0000731- Removed all types from the 'types' module that are easily accessable
732 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000733
Georg Brandl52d168a2008-01-07 18:10:24 +0000734
Guido van Rossum4405cf32007-08-30 17:16:55 +0000735What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000736==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000737
Guido van Rossum4405cf32007-08-30 17:16:55 +0000738*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000739
740Core and Builtins
741-----------------
742
Martin v. Löwis47383402007-08-15 07:32:56 +0000743- PEP 3131: Support non-ASCII identifiers.
744
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000745- PEP 3120: Change default encoding to UTF-8.
746
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000747- PEP 3123: Use proper C inheritance for PyObject.
748
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000749- Removed the __oct__ and __hex__ special methods and added a bin()
750 builtin function.
751
Georg Brandl52b92cc2008-05-25 09:43:03 +0000752- PEP 3127: octal literals now start with "0o". Old-style octal
753 literals are invalid. There are binary literals with a prefix of
754 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000755
Guido van Rossume7ba4952007-06-06 23:52:48 +0000756- None, True, False are now keywords.
757
Guido van Rossum29478ef2007-05-29 00:39:44 +0000758- PEP 3119: isinstance() and issubclass() can be overridden.
759
Guido van Rossumebe3e162007-05-17 18:20:34 +0000760- Remove BaseException.message.
761
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000762- Remove tuple parameter unpacking (PEP 3113).
763
Georg Brandl52b92cc2008-05-25 09:43:03 +0000764- Remove the f_restricted attribute from frames. This naturally leads
765 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000766
Georg Brandl52b92cc2008-05-25 09:43:03 +0000767- PEP 3132 was accepted. That means that you can do ``a, *b =
768 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000769
Georg Brandl52b92cc2008-05-25 09:43:03 +0000770- range() now returns an iterator rather than a list. Floats are not
771 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000772
Nick Coghlan650f0d02007-04-15 12:05:43 +0000773- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000774 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000775
Guido van Rossume27dc722007-03-27 22:37:34 +0000776- By default, != returns the opposite of ==, unless the latter returns
777 NotImplemented.
778
Georg Brandl52b92cc2008-05-25 09:43:03 +0000779- Patch #1680961: sys.exitfunc has been removed and replaced with a
780 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000781
Georg Brandl801dd732007-03-18 20:18:31 +0000782- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000783 keyword arg in the class statement, which can now use the full
784 syntax of a parameter list. Also, the metaclass can implement a
785 __prepare__ function which will be called to create the dictionary
786 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000787
Georg Brandl428f0642007-03-18 18:35:15 +0000788- The long-deprecated argument "pend" of PyFloat_FromString() has been
789 removed.
790
Georg Brandle32b4222007-03-10 22:13:27 +0000791- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000792 its argument, if it exists. If not, it will work like before. This
793 allows customizing the output of dir() in the presence of a
794 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000795
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000796- Removed support for __members__ and __methods__.
797
Georg Brandle32b4222007-03-10 22:13:27 +0000798- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000799
Georg Brandle32b4222007-03-10 22:13:27 +0000800- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000801 functionality formerly known as raw_input(); the name raw_input() is
802 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000803
Georg Brandl52b92cc2008-05-25 09:43:03 +0000804- Classes listed in an 'except' clause must inherit from
805 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000806
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000807- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000808 and .keys(), .items(), .values() return dict views, which behave
809 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000810
Guido van Rossum8b545362007-02-09 23:52:14 +0000811- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000812 'softspace' attribute of files is now gone (since print() doesn't
813 use it). A side effect of this change is that you can get
814 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000815
816 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000817 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000818
819 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000820
Brett Cannon398db8b2007-01-29 23:44:37 +0000821- PEP 3102: keyword-only arguments.
822
Georg Brandl52b92cc2008-05-25 09:43:03 +0000823- Int/Long unification is complete. The 'long' built-in type and
824 literals with trailing 'L' or 'l' have been removed. Performance
825 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000826
827- 'except E, V' must now be spelled as 'except E as V' and deletes V
828 at the end of the except clause; V must be a simple name.
829
Neal Norwitzc1505362006-12-28 06:47:50 +0000830- Added function annotations per PEP 3107.
831
Georg Brandl52b92cc2008-05-25 09:43:03 +0000832- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000833
834 >>> def f(x):
835 ... def inc():
836 ... nonlocal x
837 ... x += 1
838 ... return x
839 ... return inc
840 ...
841 >>> inc = f(0)
842 >>> inc()
843 1
844 >>> inc()
845 2
846
Georg Brandl66a796e2006-12-19 20:50:34 +0000847- Moved intern() to sys.intern().
848
849- exec is now a function.
850
851- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000852
Neal Norwitz4886cc32006-08-21 17:06:07 +0000853- Classic classes are a thing of the past. All classes are new style.
854
855- Exceptions *must* derive from BaseException.
856
857- Integer division always returns a float. The -Q option is no more.
858 All the following are gone:
859 * PyNumber_Divide and PyNumber_InPlaceDivide
860 * __div__, __rdiv__, and __idiv__
861 * nb_divide, nb_inplace_divide
862 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
863 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
864 if we want to re-use __div__ and friends. If we do, it will make
865 it harder to write code for both 2.x and 3.x.)
866
867- 'as' and 'with' are keywords.
868
869- Absolute import is the default behavior for 'import foo' etc.
870
Georg Brandl52b92cc2008-05-25 09:43:03 +0000871- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000872
Georg Brandl52b92cc2008-05-25 09:43:03 +0000873- Removed these Python builtins: apply(), callable(), coerce(),
874 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000875
Georg Brandl52b92cc2008-05-25 09:43:03 +0000876- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000877
Georg Brandl52b92cc2008-05-25 09:43:03 +0000878- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000879
880- Remove C API support for restricted execution.
881
Guido van Rossumcf1be882007-08-30 22:07:17 +0000882- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000883 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000884 sequences of unequal length -- it now stops after the shortest one
885 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000886
Georg Brandl52b92cc2008-05-25 09:43:03 +0000887- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000888
889- Added class decorators per PEP 3129.
890
891
892Extension Modules
893-----------------
894
Georg Brandl52b92cc2008-05-25 09:43:03 +0000895- Removed the imageop module. Obsolete long with its unit tests
896 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000897
Georg Brandl52b92cc2008-05-25 09:43:03 +0000898- Removed these attributes from the operator module: div, idiv,
899 __div__, __idiv__, isCallable, sequenceIncludes.
900
901- Removed these attributes from the sys module: exc_clear(), exc_type,
902 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000903
904
905Library
906-------
907
Georg Brandl52b92cc2008-05-25 09:43:03 +0000908- Removed the compiler package. Use of the _ast module and (an
909 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000910
Georg Brandl52b92cc2008-05-25 09:43:03 +0000911- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
912 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
913 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000914
Georg Brandl52b92cc2008-05-25 09:43:03 +0000915- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000916
Georg Brandl52b92cc2008-05-25 09:43:03 +0000917- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
918 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
919 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000920
Georg Brandl52b92cc2008-05-25 09:43:03 +0000921- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000922
Georg Brandl52b92cc2008-05-25 09:43:03 +0000923- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000924 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000925
Georg Brandl52b92cc2008-05-25 09:43:03 +0000926- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000927
Georg Brandl52b92cc2008-05-25 09:43:03 +0000928- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000929
930- Patch #1680961: atexit has been reimplemented in C.
931
Walter Dörwald41980ca2007-08-16 21:55:45 +0000932- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
933
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000934Build
935-----
936
937C API
938-----
939
Georg Brandl52b92cc2008-05-25 09:43:03 +0000940- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000941
Georg Brandl52b92cc2008-05-25 09:43:03 +0000942- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
943 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000944
Georg Brandl52b92cc2008-05-25 09:43:03 +0000945- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000946
Georg Brandl52b92cc2008-05-25 09:43:03 +0000947- Removed these macros: staticforward, statichere, PyArg_GetInt,
948 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000949
Georg Brandl52b92cc2008-05-25 09:43:03 +0000950- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
951 intintobjargproc, getreadbufferproc, getwritebufferproc,
952 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000953
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000954Tests
955-----
956
Brett Cannone7a30f72008-03-03 03:36:27 +0000957- Removed test.testall as test.regrtest replaces it.
958
Brett Cannonced04e02005-02-13 22:53:22 +0000959Documentation
960-------------
961
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000962Mac
963---
964
Georg Brandl52b92cc2008-05-25 09:43:03 +0000965- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +0000966
Guido van Rossum845702c2007-08-30 18:44:53 +0000967Platforms
968---------
969
970- Support for BeOS and AtheOS was removed (according to PEP 11).
971
972- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
973
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000974Tools/Demos
975-----------
976
Georg Brandl52b92cc2008-05-25 09:43:03 +0000977
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000978**(For information about older versions, consult the HISTORY file.)**