blob: 3a076fb31c133031007cc20b1be4cdef27d3ad53 [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
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +00007What's new in Python 3.0b3?
8===========================
9
Barry Warsaw57c10582008-08-21 02:39:51 +000010*Release date: 20-Aug-2008*
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000011
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000012Core and Builtins
13-----------------
14
Antoine Pitrou616d2852008-08-19 22:09:34 +000015- Issue #2394: implement more of the memoryview API, with the caveat that
16 only one-dimensional contiguous buffers are supported and exercised right
17 now. Slicing, slice assignment and comparison (equality and inequality)
18 have been added. Also, the tolist() method has been implemented, but only
19 for byte buffers. Endly, the API has been updated to return bytes objects
20 wherever it used to return bytearrays.
21
Antoine Pitrouee58fa42008-08-19 18:22:14 +000022- Issue #3560: clean up the new C PyMemoryView API so that naming is
23 internally consistent; add macros PyMemoryView_GET_BASE() and
24 PyMemoryView_GET_BUFFER() to access useful properties of a memory views
25 without relying on a particular implementation; remove the ill-named
26 PyMemoryView() function (PyMemoryView_GET_BUFFER() can be used instead).
27
Thomas Hellerf5049fc2008-08-19 19:49:49 +000028- ctypes function pointers that are COM methods have a boolean True
29 value again.
30
Antoine Pitrou9a2310d2008-07-25 22:39:39 +000031- Issue #1819: function calls with several named parameters are now on
32 average 35% faster (as measured by pybench).
33
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +000034- The undocumented C APIs PyUnicode_AsString() and
35 PyUnicode_AsStringAndSize() were made private to the interpreter, in
36 order to be able to refine their interfaces for Python 3.1.
37
38 If you need to access the UTF-8 representation of a Unicode object
39 as bytes string, please use PyUnicode_AsUTF8String() instead.
40
Antoine Pitrouaf14b792008-08-07 21:50:41 +000041- Issue #3460: PyUnicode_Join() implementation is 10% to 80% faster thanks
42 to Python 3.0's stricter semantics which allow to avoid successive
43 reallocations of the result string (this also affects str.join()).
44
Marc-André Lemburg4cc0f242008-08-07 18:54:33 +000045
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000046Library
47-------
48
Amaury Forgeot d'Arc41e36672008-08-20 21:35:50 +000049- Issue #3614: Corrected a typo in xmlrpc.client, leading to a NameError
50 "global name 'header' is not defined".
51
Antoine Pitroufd036452008-08-19 17:56:33 +000052- Issue #2834: update the regular expression library to match the unicode
53 standards of py3k. In other words, mixing bytes and unicode strings
54 (be it as pattern, search string or replacement string) raises a TypeError.
55 Moreover, the re.UNICODE flag is enabled automatically for unicode patterns,
56 and can be disabled by specifying a new re.ASCII flag; as for bytes
57 patterns, ASCII matching is the only option and trying to specify re.UNICODE
58 for such patterns raises a ValueError.
59
Guido van Rossum52dbbb92008-08-18 21:44:30 +000060- Issue #3300: make urllib.parse.[un]quote() default to UTF-8.
61 Code contributed by Matt Giuca. quote() now encodes the input
62 before quoting, unquote() decodes after unquoting. There are
63 new arguments to change the encoding and errors settings.
64 There are also new APIs to skip the encode/decode steps.
65 [un]quote_plus() are also affected.
66
Nick Coghlan36f49522008-08-18 12:31:52 +000067- Issue #2235: numbers.Number now blocks inheritance of the default id()
68 based hash because that hash mechanism is not correct for numeric types.
69 All concrete numeric types that inherit from Number (rather than just
70 registering with it) must explicitly provide a hash implementation in
71 order for their instances to be hashable.
72
Benjamin Peterson4cd6a952008-08-17 20:23:46 +000073- Issue #2676: in the email package, content-type parsing was hanging on
74 pathological input because of quadratic or exponential behaviour of a
75 regular expression.
76
Antoine Pitrou87695762008-08-14 22:44:29 +000077- Issue #3476: binary buffered reading through the new "io" library is now
78 thread-safe.
79
Robert Schuppenies3d1c7de2008-08-10 11:28:17 +000080- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
81 menu entries were not deleted.
82
Lars Gustäbel0c24e8b2008-08-02 11:43:24 +000083- Remove the TarFileCompat class from tarfile.py.
84
Amaury Forgeot d'Arcbdbddf82008-08-01 00:06:49 +000085- Issue #2491: os.fdopen is now almost an alias for the built-in open(), and
86 accepts the same parameters. It just checks that its first argument is an
87 integer.
88
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000089- Issue #3394: zipfile.writestr sets external attributes when passed a
90 file name rather than a ZipInfo instance, so files are extracted with
91 mode 0600 rather than 000 under Unix.
92
Antoine Pitrouc66f9092008-07-28 19:46:11 +000093- Issue #2523: Fix quadratic behaviour when read()ing a binary file without
94 asking for a specific length.
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +000095
Martin v. Löwis371bb502008-08-16 13:02:57 +000096Extension Modules
97-----------------
98
99- Bug #3542: Support Unicode strings in _msi module.
100
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000101What's new in Python 3.0b2?
102===========================
103
Barry Warsaw4bd1cef2008-07-18 02:28:44 +0000104*Release date: 17-Jul-2008*
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000105
106Core and Builtins
107-----------------
108
Mark Dickinson65fe25e2008-07-16 11:30:51 +0000109- Issue #3008: the float type has a new instance method 'float.hex'
110 and a new class method 'float.fromhex' to convert floating-point
111 numbers to and from hexadecimal strings, respectively.
112
Eric Smithd68af8f2008-07-16 00:15:35 +0000113- Issue #3083: Add alternate (#) formatting for bin, oct, hex output
114 for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.
115
Amaury Forgeot d'Arca4db6862008-07-04 21:26:43 +0000116- Issue #3280: like chr(), the "%c" format now accepts unicode code points
117 beyond the Basic Multilingual Plane (above 0xffff) on all configurations. On
118 "narrow Unicode" builds, the result is a string of 2 code units, forming a
119 UTF-16 surrogate pair.
120
Georg Brandld52429f2008-07-04 15:55:02 +0000121- Issue #3282: str.isprintable() should return False for undefined
122 Unicode characters.
123
Martin v. Löwis029656f2008-06-30 04:06:08 +0000124- Issue #3236: Return small longs from PyLong_FromString.
125
Benjamin Petersone6528212008-07-15 15:32:09 +0000126- Exception tracebacks now support exception chaining.
127
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000128Library
129-------
130
Brett Cannonc2542e92008-07-25 18:19:20 +0000131- Removed the sunaudio module. Use sunau instead.
132
Thomas Heller47bc8092008-08-19 06:38:12 +0000133- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python
134 api functions without holding the GIL, which could lead to a fatal
135 error when they failed.
136
137- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.
138
Georg Brandl30704ea02008-07-23 15:07:12 +0000139- Removed "ast" function aliases from the parser module.
140
Thomas Heller15383a02008-07-15 19:46:52 +0000141- Issue #3313: Fixed a crash when a failed dlopen() call does not set
142 a valid dlerror() message.
143
Thomas Heller0261e1e2008-07-15 17:25:07 +0000144- Issue #3258: Fixed a crash when a ctypes POINTER type to an
145 incomplete structure was created.
146
Georg Brandl1abcbf82008-07-01 19:28:43 +0000147- Issue #2683: Fix inconsistency in subprocess.Popen.communicate(): the
148 argument now must be a bytes object in any case.
149
Amaury Forgeot d'Arc9196dc62008-06-19 20:54:32 +0000150- Issue #3145: help("modules whatever") failed when trying to load the source
151 code of every single module of the standard library, including invalid files
152 used in the test suite.
153
Georg Brandlbded4d32008-07-17 18:15:35 +0000154- The gettext library now consistently uses Unicode strings for message ids
155 and message strings, and ``ugettext()`` and the like don't exist anymore.
Benjamin Peterson801844d2008-07-14 14:32:15 +0000156
Benjamin Petersone6528212008-07-15 15:32:09 +0000157- The traceback module has been expanded to handle chained exceptions.
158
Amaury Forgeot d'Arc612f61f2008-07-02 23:02:21 +0000159C API
160-----
161
162- Issue #3247: the function Py_FindMethod was removed. Modern types should
163 use the tp_methods slot instead.
164
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000165Tools/Demos
166-----------
167
Georg Brandl336341f2008-07-01 20:21:28 +0000168- The Mac/Demos directory has been removed.
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000169
Georg Brandl336341f2008-07-01 20:21:28 +0000170- All of the Mac scripts have been removed (including BuildApplet.py).
Benjamin Petersonde9c8692008-07-01 18:23:09 +0000171
172
Brett Cannon0d71ee72008-05-08 18:13:40 +0000173What's new in Python 3.0b1?
174===========================
175
Barry Warsawc1e689e2008-06-19 00:35:43 +0000176*Release date: 18-Jun-2008*
Brett Cannon0d71ee72008-05-08 18:13:40 +0000177
178Core and Builtins
179-----------------
180
Brett Cannondb734912008-06-27 00:52:15 +0000181- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'
182 argument being anything other than a dict or None. Also fixed a bug in error
183 handling when 'message' and 'category' were both set to None, triggering a
184 bus error.
185
Amaury Forgeot d'Arcc856c7a2008-06-16 19:50:09 +0000186- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which
187 holds the last (strong) reference to its referent.
188
Georg Brandl559e5d72008-06-11 18:37:52 +0000189- Issue #2630: implement PEP 3138. repr() now returns printable
190 Unicode characters unescaped, to get an ASCII-only representation
191 of an object use ascii().
192
Amaury Forgeot d'Arcf1ca0b12008-06-11 17:40:47 +0000193- Issue #1342: On windows, Python could not start when installed in a
194 directory with non-ascii characters.
195
Martin v. Löwis1a214512008-06-11 05:26:20 +0000196- Implement PEP 3121: new module initialization and finalization API.
197
Georg Brandle1b5ac62008-06-04 13:06:58 +0000198- Removed the already-defunct ``-t`` option.
199
Amaury Forgeot d'Arc74c71f52008-05-26 21:41:42 +0000200- Issue #2957: Corrected a ValueError "recursion limit exceeded", when
201 unmarshalling many code objects, which happens when importing a
202 large .pyc file (~1000 functions).
203
Georg Brandl52b92cc2008-05-25 09:43:03 +0000204- Issue #2963: fix merging oversight that disabled method cache for
205 all types.
Georg Brandl1bcf35a2008-05-25 09:32:09 +0000206
Georg Brandlc9b09532008-05-25 09:24:38 +0000207- Issue #2964: fix a missing INCREF in instancemethod_descr_get.
208
Georg Brandl52b92cc2008-05-25 09:43:03 +0000209- Issue #2895: Don't crash when given bytes objects as keyword names.
Georg Brandld8b690f2008-05-16 17:28:50 +0000210
Georg Brandl52b92cc2008-05-25 09:43:03 +0000211- Issue #2798: When parsing arguments with PyArg_ParseTuple, the "s"
212 code now allows any unicode string and returns a utf-8 encoded
213 buffer, just like the "s#" code already does. The "z" code was
214 corrected as well.
Amaury Forgeot d'Arc07404592008-05-12 13:19:07 +0000215
Georg Brandl52b92cc2008-05-25 09:43:03 +0000216- Issue #2863: generators now have a ``gen.__name__`` attribute that
217 equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals
218 ``func.func_code.co_name``. The repr() of a generator now also
219 contains this name.
Alexandre Vassalottie9f305f2008-05-16 04:39:54 +0000220
221- Issue #2831: enumerate() now has a ``start`` argument.
222
Georg Brandl52b92cc2008-05-25 09:43:03 +0000223- Issue #2801: fix bug in the float.is_integer method where a
224 ValueError was sometimes incorrectly raised.
Mark Dickinsonc4352b02008-05-09 13:55:01 +0000225
Georg Brandl52b92cc2008-05-25 09:43:03 +0000226- The ``--with-toolbox-glue`` option (and the associated
227 pymactoolbox.h) have been removed.
Benjamin Peterson79629ab2008-05-14 21:07:12 +0000228
Georg Brandl52b92cc2008-05-25 09:43:03 +0000229- Issue #2196: hasattr() now lets exceptions which do not inherit
230 Exception (KeyboardInterrupt, and SystemExit) propagate instead of
231 ignoring them.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000232
Benjamin Petersoneec3d712008-06-11 15:59:43 +0000233- #3021 Exception reraising sematics have been significantly improved. However,
234 f_exc_type, f_exc_value, and f_exc_traceback cannot be accessed from Python
235 code anymore.
236
Benjamin Peterson4f92ca42008-06-11 20:21:57 +0000237- Three of PyNumberMethods' members, nb_coerce, nb_hex, and nb_oct, have been
238 removed.
239
Brett Cannon0d71ee72008-05-08 18:13:40 +0000240Extension Modules
241-----------------
242
Georg Brandl38feaf02008-05-25 07:45:51 +0000243- Renamed ``_winreg`` module to ``winreg``.
244
Georg Brandl52b92cc2008-05-25 09:43:03 +0000245- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the
246 platform.
Alexandre Vassalottibee32532008-05-16 18:15:12 +0000247
248- Support for Windows 9x has been removed from the winsound module.
249
Georg Brandl52b92cc2008-05-25 09:43:03 +0000250- Issue #2870: cmathmodule.c compile error.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000251
Brett Cannon0d71ee72008-05-08 18:13:40 +0000252Library
253-------
254
Benjamin Peterson87069fd2008-08-20 02:00:14 +0000255- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of
256 symtable.Symbol have been removed.
257
Amaury Forgeot d'Arccb0d2d72008-06-18 22:19:22 +0000258- Patch #3133: http.server.CGIHTTPRequestHandler did not work on windows.
259
Jeremy Hylton1afc1692008-06-18 20:49:58 +0000260- a new ``urllib`` package was created. It consists of code from
261 ``urllib``, ``urllib2``, ``urlparse``, and ``robotparser``. The old
262 modules have all been removed. The new package has five submodules:
263 ``urllib.parse``, ``urllib.request``, ``urllib.response``,
264 ``urllib.error``, and ``urllib.robotparser``. The
265 ``urllib.request.urlopen()`` function uses the url opener from
266 ``urllib2``. (Note that the unittests have not been renamed for the
267 beta, but they will be renamed in the future.)
268
Benjamin Petersona0c0a4a2008-06-12 22:15:50 +0000269- rfc822 has been removed in favor of the email package.
270
Benjamin Peterson425ea7f2008-06-12 14:11:35 +0000271- mimetools has been removed in favor of the email package.
Benjamin Peterson23c51a22008-06-12 14:06:57 +0000272
Barry Warsawf5019422008-06-12 02:42:00 +0000273- Patch #2849: Remove use of rfc822 module from standard library.
274
Alexandre Vassalotti794652d2008-06-11 22:58:36 +0000275- Added C optimized implementation of io.StringIO.
276
Alexandre Vassalottica2d6102008-06-12 18:26:05 +0000277- The ``pickle`` module is now automatically use an optimized C
278 implementation of Pickler and Unpickler when available. The
279 ``cPickle`` module is no longer needed.
280
Georg Brandl877b10a2008-06-01 21:25:55 +0000281- Removed the ``htmllib`` and ``sgmllib`` modules.
282
Georg Brandl61013952008-05-28 15:56:30 +0000283- The deprecated ``SmartCookie`` and ``SimpleCookie`` classes have
284 been removed from ``http.cookies``.
285
Brett Cannona23810f2008-05-26 19:04:21 +0000286- The ``commands`` module has been removed. Its getoutput() and
287 getstatusoutput() functions have been moved to the ``subprocess`` module.
288
Georg Brandl3d5c4252008-05-26 18:03:26 +0000289- The ``http`` package was created; it contains the old ``httplib``
290 as ``http.client``, ``Cookie`` as ``http.cookies``, ``cookielib``
291 as ``http.cookiejar``, and the content of the three ``HTTPServer``
292 modules as ``http.server``.
293
Georg Brandl38eceaa2008-05-26 11:14:17 +0000294- The ``xmlrpc`` package was created; it contains the old
295 ``xmlrpclib`` module as ``xmlrpc.client`` and the content of
296 the old ``SimpleXMLRPCServer`` and ``DocXMLRPCServer`` modules
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000297 as ``xmlrpc.server``.
Georg Brandl38eceaa2008-05-26 11:14:17 +0000298
299- The ``dbm`` package was created, containing the old modules
300 ``anydbm`` and ``whichdb`` in its ``__init__.py``, and having
301 ``dbm.gnu`` (was ``gdbm``), ``dbm.bsd`` (was ``dbhash``),
302 ``dbm.ndbm`` (was ``dbm``) and ``dbm.dumb`` (was ``dumbdbm``)
303 as submodules.
304
Georg Brandl52b92cc2008-05-25 09:43:03 +0000305- The ``repr`` module has been renamed to ``reprlib``.
Alexandre Vassalotti1f2ba4b2008-05-16 07:12:44 +0000306
Georg Brandl52b92cc2008-05-25 09:43:03 +0000307- The ``statvfs`` module has been removed.
Brett Cannonacbb7862008-05-16 00:42:57 +0000308
Georg Brandl52b92cc2008-05-25 09:43:03 +0000309- Issue #1713041: fix pprint's handling of maximum depth.
Alexandre Vassalottieca20b62008-05-16 02:54:33 +0000310
Georg Brandl52b92cc2008-05-25 09:43:03 +0000311- Issue #2250: Exceptions raised during evaluation of names in
312 rlcompleter's ``Completer.complete()`` method are now caught and
313 ignored.
Alexandre Vassalotti8ae3e052008-05-16 00:41:41 +0000314
Georg Brandl52b92cc2008-05-25 09:43:03 +0000315- Patch #2659: Added ``break_on_hyphens`` option to textwrap's
316 ``TextWrapper`` class.
Alexandre Vassalotti1d1eaa42008-05-14 22:59:42 +0000317
Alexandre Vassalotti6461e102008-05-15 22:09:29 +0000318- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
319 large to fit in a C long. ldexp(x, n) now returns a zero (with
320 suitable sign) if n is large and negative; previously, it raised
321 OverflowError.
322
Georg Brandl52b92cc2008-05-25 09:43:03 +0000323- The ``ConfigParser`` module has been renamed to ``configparser``.
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000324
Georg Brandl52b92cc2008-05-25 09:43:03 +0000325- Issue #2865: webbrowser.open() works again in a KDE environment.
Amaury Forgeot d'Arc2b2b44d2008-05-12 14:41:00 +0000326
Georg Brandl52b92cc2008-05-25 09:43:03 +0000327- The ``multifile`` module has been removed.
Brett Cannond3343cb2008-05-12 03:18:21 +0000328
Georg Brandl52b92cc2008-05-25 09:43:03 +0000329- The ``SocketServer`` module has been renamed to ``socketserver``.
Alexandre Vassalottice261952008-05-12 02:31:37 +0000330
Georg Brandl52b92cc2008-05-25 09:43:03 +0000331- Fixed the ``__all__`` setting on ``collections`` to include
332 ``UserList`` and ``UserString``.
Brett Cannon23a4a7b2008-05-12 00:56:28 +0000333
Brett Cannoncf3520c2008-05-11 22:47:58 +0000334- The sre module has been removed.
335
Alexandre Vassalottif260e442008-05-11 19:59:59 +0000336- The Queue module has been renamed to queue.
337
Alexandre Vassalottif7fa63d2008-05-11 08:55:36 +0000338- The copy_reg module has been renamed to copyreg.
339
Brett Cannond8b61ee2008-05-11 03:00:26 +0000340- The mhlib module has been removed.
341
Brett Cannonbd474422008-05-10 22:42:14 +0000342- The ihooks module has been removed.
343
Brett Cannonb59a2bd2008-05-10 22:03:16 +0000344- The fpformat module has been removed.
345
Brett Cannonf4fd9932008-05-10 21:11:46 +0000346- The dircache module has been removed.
347
Brett Cannond175b4c2008-05-10 03:19:54 +0000348- The Canvas module has been removed.
349
Mark Dickinsonb27406c2008-05-09 13:42:33 +0000350- The Decimal module gained the magic methods __round__, __ceil__,
351 __floor__ and __trunc__, to give support for round, math.ceil,
352 math.floor and math.trunc.
353
Brett Cannon900ee3a2008-05-08 20:31:11 +0000354- The user module has been removed.
355
Brett Cannon34afe872008-05-08 20:31:44 +0000356- The mutex module has been removed.
357
Brett Cannon0d71ee72008-05-08 18:13:40 +0000358- The imputil module has been removed.
359
Georg Brandl52b92cc2008-05-25 09:43:03 +0000360- os.path.walk has been removed in favor of os.walk.
Benjamin Petersond71ca412008-05-08 23:44:58 +0000361
Alexandre Vassalotti5f8ced22008-05-16 00:03:33 +0000362- pdb gained the "until" command.
363
Georg Brandl52b92cc2008-05-25 09:43:03 +0000364- The test.test_support module has been renamed to test.support.
Benjamin Petersonee8712c2008-05-20 21:35:26 +0000365
Georg Brandl32de7af2008-08-18 23:07:41 +0000366- The threading module API was renamed to be PEP 8 compliant. The
367 old names are still present, but will be removed in the near future.
Benjamin Peterson672b8032008-06-11 19:14:14 +0000368
Georg Brandl294d5a92008-06-01 19:25:32 +0000369Tools/Demos
370-----------
371
372- The bgen tool has been removed.
Benjamin Peterson630c8292008-06-01 18:50:38 +0000373
Brett Cannon0d71ee72008-05-08 18:13:40 +0000374Build
375-----
376
377
Barry Warsaw66079cd2008-04-04 01:36:36 +0000378What's New in Python 3.0a5?
379===========================
380
Barry Warsaw9eab8b02008-05-08 13:05:38 +0000381*Release date: 08-May-2008*
Barry Warsaw66079cd2008-04-04 01:36:36 +0000382
383Core and Builtins
384-----------------
385
Georg Brandl52b92cc2008-05-25 09:43:03 +0000386- Fixed misbehaviour of PyLong_FromSsize_t on systems where
387 sizeof(size_t) > sizeof(long).
Mark Dickinson7ab6be22008-04-15 21:42:42 +0000388
Georg Brandl52b92cc2008-05-25 09:43:03 +0000389- Issue #2221: Corrected a SystemError "error return without exception
390 set", when the code executed by exec() raises an exception, and
391 sys.stdout.flush() also raises an error.
Amaury Forgeot d'Arc7fedbe52008-04-10 21:03:09 +0000392
Georg Brandl52b92cc2008-05-25 09:43:03 +0000393- Bug #2565: The repr() of type objects now calls them 'class', not
394 'type' - whether they are builtin types or not.
Martin v. Löwis250ad612008-04-07 05:43:42 +0000395
Martin v. Löwis790465f2008-04-05 20:41:37 +0000396- The command line processing was converted to pass Unicode strings
397 through as unmodified as possible; as a consequence, the C API
398 related to command line arguments was changed to use wchar_t.
399
Georg Brandl52b92cc2008-05-25 09:43:03 +0000400- All backslashes in raw strings are interpreted literally. This
401 means that '\u' and '\U' escapes are not treated specially.
Benjamin Petersona2f837f2008-04-28 21:05:10 +0000402
Barry Warsaw66079cd2008-04-04 01:36:36 +0000403Extension Modules
404-----------------
405
406Library
407-------
408
Georg Brandl52b92cc2008-05-25 09:43:03 +0000409- ctypes objects now support the PEP3118 buffer interface.
Thomas Hellerb041fda2008-04-30 17:11:46 +0000410
Thomas Hellere106dc32008-04-24 18:39:36 +0000411- Issue #2682: ctypes callback functions now longer contain a cyclic
412 reference to themselves.
413
Georg Brandl52b92cc2008-05-25 09:43:03 +0000414- Issue #2058: Remove the buf attribute and add __slots__ to the
415 TarInfo class in order to reduce tarfile's memory usage.
Lars Gustäbelc2ea8c62008-04-14 10:05:48 +0000416
Martin v. Löwis8efc62c2008-04-10 19:02:25 +0000417- Bug #2606: Avoid calling .sort() on a dict_keys object.
418
Thomas Hellerbff533b2008-04-04 19:53:14 +0000419- The bundled libffi copy is now in sync with the recently released
420 libffi3.0.5 version, apart from some small changes to
421 Modules/_ctypes/libffi/configure.ac.
422
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000423Build
424-----
425
Mark Dickinsonb0e2b4c2008-04-26 20:48:56 +0000426- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
427
Guido van Rossumdc21db32008-04-07 18:37:41 +0000428- "make install" is now an alias for "make altinstall", to prevent
Georg Brandl52b92cc2008-05-25 09:43:03 +0000429 accidentally overwriting a Python 2.x installation. Use "make
430 fullinstall" to force Python 3.0 to be installed as "python".
Guido van Rossumdc21db32008-04-07 18:37:41 +0000431
Thomas Hellerf44b9a12008-04-04 10:18:23 +0000432- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
433 gcc is used as compiler.
Barry Warsaw66079cd2008-04-04 01:36:36 +0000434
Georg Brandl52b92cc2008-05-25 09:43:03 +0000435
Barry Warsawa9d499d2008-03-01 18:38:07 +0000436What's New in Python 3.0a4?
437===========================
438
Barry Warsawbb5cd082008-04-02 23:33:27 +0000439*Release date: 02-Apr-2008*
Barry Warsawa9d499d2008-03-01 18:38:07 +0000440
Martin v. Löwis25931462008-03-17 20:43:42 +0000441Core and Builtins
442-----------------
443
444- Bug #2301: Don't try decoding the source code into the original
445 encoding for syntax errors.
446
Martin v. Löwis92fab752008-03-08 10:40:41 +0000447Extension Modules
448-----------------
449
Neal Norwitz6cf49cf2008-03-24 06:22:57 +0000450- The dl module was removed, use the ctypes module instead.
451
Martin v. Löwis92fab752008-03-08 10:40:41 +0000452- Use wchar_t functions in _locale module.
Barry Warsawa9d499d2008-03-01 18:38:07 +0000453
Martin v. Löwis071ef772008-03-08 11:24:24 +0000454Library
455-------
456
Georg Brandl52b92cc2008-05-25 09:43:03 +0000457- The class distutils.commands.build_py.build_py_2to3 can be used as a
458 build_py replacement to automatically run 2to3 on modules that are
459 going to be installed.
Martin v. Löwis73a22f02008-03-22 00:35:10 +0000460
Guido van Rossumf4169812008-03-17 22:56:06 +0000461- A new pickle protocol (protocol 3) is added with explicit support
462 for bytes. This is the default protocol. It intentionally cannot
463 be unpickled by Python 2.x.
464
465- When a pickle written by Python 2.x contains an (8-bit) str
466 instance, this is now decoded to a (Unicode) str instance. The
467 encoding used to do this defaults to ASCII, but can be overridden
468 via two new keyword arguments to the Unpickler class. Previously
469 this would create bytes instances, which is usually wrong: str
470 instances are often used to pickle attribute names etc., and text is
471 more common than binary data anyway.
472
Martin v. Löwis071ef772008-03-08 11:24:24 +0000473- Default to ASCII as the locale.getpreferredencoding, if the POSIX
Georg Brandl52b92cc2008-05-25 09:43:03 +0000474 system doesn't support CODESET and LANG isn't set or doesn't allow
475 deduction of an encoding.
Martin v. Löwis071ef772008-03-08 11:24:24 +0000476
Georg Brandl52b92cc2008-05-25 09:43:03 +0000477- Issue #1202: zlib.crc32 and zlib.adler32 now return an unsigned
478 value.
Gregory P. Smith425136b2008-03-17 20:45:21 +0000479
Georg Brandl52b92cc2008-05-25 09:43:03 +0000480- Issue #719888: Updated tokenize to use a bytes API. generate_tokens
481 has been renamed tokenize and now works with bytes rather than
482 strings. A new detect_encoding function has been added for
483 determining source file encoding according to PEP-0263. Token
484 sequences returned by tokenize always start with an ENCODING token
485 which specifies the encoding used to decode the file. This token is
486 used to encode the output of untokenize back to bytes.
487
Barry Warsawa9d499d2008-03-01 18:38:07 +0000488
Christian Heimesbc873412007-12-08 22:11:32 +0000489What's New in Python 3.0a3?
490===========================
491
Barry Warsaw659fc422008-03-01 17:45:23 +0000492*Release date: 29-Feb-2008*
Christian Heimesbc873412007-12-08 22:11:32 +0000493
494Core and Builtins
495-----------------
496
Georg Brandl52b92cc2008-05-25 09:43:03 +0000497- Issue #2282: io.TextIOWrapper was not overriding seekable() from
498 io.IOBase.
Ka-Ping Yeeddaa7062008-03-17 20:35:15 +0000499
Georg Brandl52b92cc2008-05-25 09:43:03 +0000500- Issue #2115: Important speedup in setting __slot__ attributes. Also
501 prevent a possible crash: an Abstract Base Class would try to access
502 a slot on a registered virtual subclass.
Christian Heimesa156e092008-02-16 07:38:31 +0000503
Georg Brandl52b92cc2008-05-25 09:43:03 +0000504- Fixed repr() and str() of complex numbers with infinity or nan as
505 real or imaginary part.
Christian Heimesa156e092008-02-16 07:38:31 +0000506
Georg Brandl52b92cc2008-05-25 09:43:03 +0000507- Clear all free list during a gc.collect() of the highest generation
508 in order to allow pymalloc to free more arenas. Python may give back
509 memory to the OS earlier.
Christian Heimesa156e092008-02-16 07:38:31 +0000510
Georg Brandl52b92cc2008-05-25 09:43:03 +0000511- Issue #2045: Fix an infinite recursion triggered when printing a
512 subclass of collections.defaultdict, if its default_factory is set
513 to a bound method.
Christian Heimesa156e092008-02-16 07:38:31 +0000514
515- Fixed a minor memory leak in dictobject.c. The content of the free
516 list was not freed on interpreter shutdown.
517
Georg Brandl52b92cc2008-05-25 09:43:03 +0000518- Limit free list of method and builtin function objects to 256
519 entries each.
Christian Heimesa156e092008-02-16 07:38:31 +0000520
Georg Brandl52b92cc2008-05-25 09:43:03 +0000521- Patch #1953: Added ``sys._compact_freelists()`` and the C API
522 functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
Christian Heimesa156e092008-02-16 07:38:31 +0000523 to compact the internal free lists of pre-allocted ints and floats.
524
525- Bug #1983: Fixed return type of fork(), fork1() and forkpty() calls.
Georg Brandl52b92cc2008-05-25 09:43:03 +0000526 Python expected the return type int but the fork familie returns
527 pi_t.
Christian Heimesa156e092008-02-16 07:38:31 +0000528
Georg Brandl52b92cc2008-05-25 09:43:03 +0000529- Issue #1678380: Fix a bug that identifies 0j and -0j when they
530 appear in the same code unit.
Christian Heimesa156e092008-02-16 07:38:31 +0000531
Georg Brandl52b92cc2008-05-25 09:43:03 +0000532- Issue #2025: Added tuple.count() and tuple.index() methods to comply
533 with the collections.Sequence API.
Raymond Hettinger65baa342008-02-07 00:41:02 +0000534
Georg Brandl52b92cc2008-05-25 09:43:03 +0000535- Fixed multiple reinitialization of the Python interpreter. The small
536 int list in longobject.c has caused a seg fault during the third
537 finalization.
Christian Heimesdfc12ed2008-01-31 15:16:38 +0000538
Georg Brandl52b92cc2008-05-25 09:43:03 +0000539- Issue #1973: bytes.fromhex('') raised SystemError.
Christian Heimesc04dac02008-01-30 11:27:57 +0000540
Georg Brandl52b92cc2008-05-25 09:43:03 +0000541- Issue #1771: remove cmp parameter from sorted() and list.sort().
Raymond Hettinger70b64fc2008-01-30 20:15:17 +0000542
Georg Brandl52b92cc2008-05-25 09:43:03 +0000543- Issue #1969: split and rsplit in bytearray are inconsistent.
Christian Heimes7b876152008-01-30 09:51:48 +0000544
Georg Brandl52b92cc2008-05-25 09:43:03 +0000545- map() no longer accepts None for the first argument. Use zip()
546 instead.
Raymond Hettinger1dfde1d2008-01-22 23:25:35 +0000547
Facundo Batista2336bdd2008-01-19 19:12:01 +0000548- Issue #1769: Now int("- 1") is not allowed any more.
549
Georg Brandl52b92cc2008-05-25 09:43:03 +0000550- Object/longobject.c: long(float('nan')) raises an OverflowError
551 instead of returning 0.
Christian Heimes386cd1e2008-01-15 02:01:20 +0000552
Georg Brandl52b92cc2008-05-25 09:43:03 +0000553- Issue #1762972: __file__ points to the source file instead of the
554 pyc/pyo file if the py file exists.
Christian Heimes3b06e532008-01-07 20:12:44 +0000555
Guido van Rossumab078dd2008-01-06 00:09:11 +0000556- Issue #1393: object_richcompare() returns NotImplemented instead of
557 False if the objects aren't equal, to give the other side a chance.
558
Guido van Rossume239b002008-01-06 00:44:20 +0000559- Issue #1692: Interpreter was not displaying location of SyntaxError.
Kurt B. Kaiser43b15092008-01-05 04:32:22 +0000560
Georg Brandl52b92cc2008-05-25 09:43:03 +0000561- Improve some exception messages when Windows fails to load an
562 extension module. Now we get for example '%1 is not a valid Win32
563 application' instead of 'error code 193'. Also use Unicode strings
564 to deal with non-English locales.
Amaury Forgeot d'Arcbccd63c2008-01-04 01:21:27 +0000565
Georg Brandl52b92cc2008-05-25 09:43:03 +0000566- Issue #1587: Added instancemethod wrapper for PyCFunctions. The
567 Python C API has gained a new type *PyInstanceMethod_Type* and the
568 functions *PyInstanceMethod_Check(o)*, *PyInstanceMethod_New(func)*
569 and *PyInstanceMethod_Function(im)*.
Christian Heimesa3534a62007-12-11 19:56:40 +0000570
Georg Brandl52b92cc2008-05-25 09:43:03 +0000571- Constants gc.DEBUG_OBJECT and gc.DEBUG_INSTANCE have been removed
572 from the gc module; gc.DEBUG_COLLECTABLE or gc.DEBUG_UNCOLLECTABLE
573 are now enough to print the corresponding list of objects considered
574 by the garbage collector.
Amaury Forgeot d'Arcad8dcd52007-12-10 23:58:35 +0000575
Georg Brandl52b92cc2008-05-25 09:43:03 +0000576- Issue #1573: Improper use of the keyword-only syntax makes the
577 parser crash.
Christian Heimesbc873412007-12-08 22:11:32 +0000578
Georg Brandl52b92cc2008-05-25 09:43:03 +0000579- Issue #1564: The set implementation should special-case PyUnicode
580 instead of PyString.
Christian Heimes0ded5b52007-12-10 15:50:56 +0000581
Guido van Rossumea6775b2008-02-21 20:16:31 +0000582- Patch #1031213: Decode source line in SyntaxErrors back to its
583 original source encoding.
Christian Heimes7131fd92008-02-19 14:21:46 +0000584
Christian Heimes09aaa882008-02-23 15:01:06 +0000585- inspect.getsource() includes the decorators again.
586
Guido van Rossumea6775b2008-02-21 20:16:31 +0000587- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a
588 mountpoint.
Christian Heimes7131fd92008-02-19 14:21:46 +0000589
Georg Brandl52b92cc2008-05-25 09:43:03 +0000590- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
591 the first chunk fed to the decoder started with a BOM, but was
592 longer than 3 bytes.
Christian Heimes7131fd92008-02-19 14:21:46 +0000593
Christian Heimesbc873412007-12-08 22:11:32 +0000594Extension Modules
595-----------------
596
Georg Brandl52b92cc2008-05-25 09:43:03 +0000597- Code for itertools ifilter(), imap(), and izip() moved to bultins
598 and renamed to filter(), map(), and zip(). Also, renamed
599 izip_longest() to zip_longest() and ifilterfalse() to filterfalse().
Raymond Hettinger736c0ab2008-03-13 02:09:15 +0000600
Georg Brandl52b92cc2008-05-25 09:43:03 +0000601- Issue #1762972: Readded the reload() function as imp.reload().
Guido van Rossumea6775b2008-02-21 20:16:31 +0000602
Georg Brandl52b92cc2008-05-25 09:43:03 +0000603- Bug #2111: mmap segfaults when trying to write a block opened with
604 PROT_READ.
Christian Heimesa156e092008-02-16 07:38:31 +0000605
Georg Brandl52b92cc2008-05-25 09:43:03 +0000606- Issue #2063: correct order of utime and stime in os.times() result
607 on Windows.
Christian Heimes7131fd92008-02-19 14:21:46 +0000608
Christian Heimesbc873412007-12-08 22:11:32 +0000609Library
610-------
611
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000612- Weakref dictionaries now inherit from MutableMapping.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000613
Georg Brandl52b92cc2008-05-25 09:43:03 +0000614- Created new UserDict class in collections module. This one inherits
615 from and complies with the MutableMapping ABC. Also, moved
616 UserString and UserList to the collections module. The
617 MutableUserString class was removed.
Raymond Hettinger48b8b662008-02-05 01:53:00 +0000618
Guido van Rossumea6775b2008-02-21 20:16:31 +0000619- Removed UserDict.DictMixin. Replaced all its uses with
620 collections.MutableMapping.
Raymond Hettingeredf3b732008-02-04 22:07:15 +0000621
Guido van Rossume239b002008-01-06 00:44:20 +0000622- Issue #1703: getpass() should flush after writing prompt.
Christian Heimesfc5aa9d2007-12-11 09:00:01 +0000623
Guido van Rossume239b002008-01-06 00:44:20 +0000624- Issue #1585: IDLE uses non-existent xrange() function.
625
626- Issue #1578: Problems in win_getpass.
627
Georg Brandl52d168a2008-01-07 18:10:24 +0000628Build
629-----
630
Georg Brandl52b92cc2008-05-25 09:43:03 +0000631- Renamed --enable-unicode configure flag to --with-wide-unicode,
632 since Unicode strings can't be disabled anymore.
Georg Brandl52d168a2008-01-07 18:10:24 +0000633
Guido van Rossume239b002008-01-06 00:44:20 +0000634C API
635-----
636
637- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
638 Py_TYPE and Py_REFCNT.
639
Georg Brandl52b92cc2008-05-25 09:43:03 +0000640- New API PyImport_ImportModuleNoBlock(), works like
641 PyImport_ImportModule() but won't block on the import lock
642 (returning an error instead).
Christian Heimes0ec88b32007-12-10 17:02:00 +0000643
Christian Heimesbc873412007-12-08 22:11:32 +0000644
Fred Drake0e474a82007-10-11 18:01:43 +0000645What's New in Python 3.0a2?
Christian Heimesbc873412007-12-08 22:11:32 +0000646===========================
Fred Drake0e474a82007-10-11 18:01:43 +0000647
Guido van Rossum99533a92007-12-06 05:07:41 +0000648*Release date: 07-Dec-2007*
649
650(Note: this list is incomplete.)
Fred Drake0e474a82007-10-11 18:01:43 +0000651
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000652Core and Builtins
653-----------------
654
Brett Cannon37f7e6e2007-10-26 05:42:09 +0000655- str8 now has the same construction signature as bytes.
656
Georg Brandl52b92cc2008-05-25 09:43:03 +0000657- Comparisons between str and str8 now return False/True for ==/!=.
658 sqlite3 returns str8 when recreating on object from it's __conform__
659 value. The struct module returns str8 for all string-related
660 formats. This was true before this change, but becomes more
661 apparent thanks to string comparisons always being False.
Brett Cannon40430012007-10-22 20:24:51 +0000662
Georg Brandl52b92cc2008-05-25 09:43:03 +0000663- Replaced `PyFile_FromFile()` with `PyFile_FromFd(fd, name. mode,
664 buffer, encoding, newline)`.
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000665
666- Fixed `imp.find_module()` to obey the -*- coding: -*- header.
667
668- Changed `__file__` and `co_filename` to unicode. The path names are decoded
Antoine Pitrou6e1df8d2008-07-25 19:58:18 +0000669 with `Py_FileSystemDefaultEncoding` and a new API method
Guido van Rossum40d20bc2007-10-22 00:09:51 +0000670 `PyUnicode_DecodeFSDefault(char*)` was added.
671
Georg Brandl52b92cc2008-05-25 09:43:03 +0000672- io.open() and _fileio.FileIO have grown a new argument closefd. A
673 false value disables the closing of the file descriptor.
Guido van Rossum2dced8b2007-10-30 17:27:30 +0000674
Georg Brandl52b92cc2008-05-25 09:43:03 +0000675- Added a new option -b to issues warnings (-bb for errors) about
676 certain operations between bytes/buffer and str like str(b'') and
677 comparison.
Guido van Rossum98297ee2007-11-06 21:34:58 +0000678
Georg Brandl52b92cc2008-05-25 09:43:03 +0000679- The standards streams sys.stdin, stdout and stderr may be None when
680 the when the C runtime library returns an invalid file descriptor
681 for the streams (fileno(stdin) < 0). For now this happens only for
682 Windows GUI apps and scripts started with `pythonw.exe`.
Christian Heimes58cb1b82007-11-13 02:19:40 +0000683
Christian Heimesbce52be2007-11-17 19:08:41 +0000684- Added PCbuild9 directory for VS 2008.
685
Georg Brandl52b92cc2008-05-25 09:43:03 +0000686- Renamed structmember.h WRITE_RESTRICTED to PY_WRITE_RESTRICTED to
687 work around a name clash with VS 2008 on Windows.
Christian Heimesbce52be2007-11-17 19:08:41 +0000688
Georg Brandl52b92cc2008-05-25 09:43:03 +0000689- Unbound methods are gone for good. ClassObject.method returns an
690 ordinary function object, instance.method still returns a bound
691 method object. The API of bound methods is cleaned up, too. The
692 im_class attribute is removed and im_func + im_self are renamed to
693 __func__ and __self__. The factory PyMethod_New takes only func and
694 instance as argument.
Christian Heimesff737952007-11-27 10:40:20 +0000695
Georg Brandl52b92cc2008-05-25 09:43:03 +0000696- intobject.h is no longer included by Python.h. The remains were
697 moved to longobject.h. It still exists to define several aliases
698 from PyInt_ to PyLong_ functions.
Christian Heimesf78b1c62007-12-02 16:52:32 +0000699
Christian Heimesa37d4c62007-12-04 23:02:19 +0000700- Removed sys.maxint, use sys.maxsize instead.
701
Fred Drake0e474a82007-10-11 18:01:43 +0000702Extension Modules
703-----------------
704
705- The `hotshot` profiler has been removed; use `cProfile` instead.
706
Brett Cannone9fd2312007-10-12 19:18:19 +0000707Library
708-------
709
Georg Brandl52b92cc2008-05-25 09:43:03 +0000710- When loading an external file using testfile(), the passed-in
711 encoding argument was being ignored if __loader__ is defined and
712 forcing the source to be UTF-8.
Brett Cannone9fd2312007-10-12 19:18:19 +0000713
Georg Brandl52b92cc2008-05-25 09:43:03 +0000714- The methods `os.tmpnam()`, `os.tempnam()` and `os.tmpfile()` have
715 been removed in favor of the tempfile module.
Guido van Rossum687b9c02007-10-25 23:18:51 +0000716
Christian Heimesc9543e42007-11-28 08:28:28 +0000717- Removed the 'new' module.
718
Georg Brandl52b92cc2008-05-25 09:43:03 +0000719- Removed all types from the 'types' module that are easily accessable
720 through builtins.
Brett Cannone9fd2312007-10-12 19:18:19 +0000721
Georg Brandl52d168a2008-01-07 18:10:24 +0000722
Guido van Rossum4405cf32007-08-30 17:16:55 +0000723What's New in Python 3.0a1?
Guido van Rossum45aecf42006-03-15 04:58:47 +0000724==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +0000725
Guido van Rossum4405cf32007-08-30 17:16:55 +0000726*Release date: 31-Aug-2007*
Neal Norwitz4886cc32006-08-21 17:06:07 +0000727
728Core and Builtins
729-----------------
730
Martin v. Löwis47383402007-08-15 07:32:56 +0000731- PEP 3131: Support non-ASCII identifiers.
732
Martin v. Löwis447d33e2007-07-29 18:10:01 +0000733- PEP 3120: Change default encoding to UTF-8.
734
Martin v. Löwis9f2e3462007-07-21 17:22:18 +0000735- PEP 3123: Use proper C inheritance for PyObject.
736
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000737- Removed the __oct__ and __hex__ special methods and added a bin()
738 builtin function.
739
Georg Brandl52b92cc2008-05-25 09:43:03 +0000740- PEP 3127: octal literals now start with "0o". Old-style octal
741 literals are invalid. There are binary literals with a prefix of
742 "0b". This also affects int(x, 0).
Guido van Rossumcd16bf62007-06-13 18:07:49 +0000743
Guido van Rossume7ba4952007-06-06 23:52:48 +0000744- None, True, False are now keywords.
745
Guido van Rossum29478ef2007-05-29 00:39:44 +0000746- PEP 3119: isinstance() and issubclass() can be overridden.
747
Guido van Rossumebe3e162007-05-17 18:20:34 +0000748- Remove BaseException.message.
749
Guido van Rossum1bc535d2007-05-15 18:46:22 +0000750- Remove tuple parameter unpacking (PEP 3113).
751
Georg Brandl52b92cc2008-05-25 09:43:03 +0000752- Remove the f_restricted attribute from frames. This naturally leads
753 to the removal of PyEval_GetRestricted() and PyFrame_IsRestricted().
Guido van Rossuma8add0e2007-05-14 22:03:55 +0000754
Georg Brandl52b92cc2008-05-25 09:43:03 +0000755- PEP 3132 was accepted. That means that you can do ``a, *b =
756 range(5)`` to assign 0 to a and [1, 2, 3, 4] to b.
Guido van Rossum0368b722007-05-11 16:50:42 +0000757
Georg Brandl52b92cc2008-05-25 09:43:03 +0000758- range() now returns an iterator rather than a list. Floats are not
759 allowed. xrange() is no longer defined.
Guido van Rossum805365e2007-05-07 22:24:25 +0000760
Nick Coghlan650f0d02007-04-15 12:05:43 +0000761- Patch #1660500: hide iteration variable in list comps, add set comps
Georg Brandl52b92cc2008-05-25 09:43:03 +0000762 and use common code to handle compilation of iterative expressions.
Nick Coghlan650f0d02007-04-15 12:05:43 +0000763
Guido van Rossume27dc722007-03-27 22:37:34 +0000764- By default, != returns the opposite of ==, unless the latter returns
765 NotImplemented.
766
Georg Brandl52b92cc2008-05-25 09:43:03 +0000767- Patch #1680961: sys.exitfunc has been removed and replaced with a
768 private C-level API.
Collin Winter670e6922007-03-21 02:57:17 +0000769
Georg Brandl801dd732007-03-18 20:18:31 +0000770- PEP 3115: new metaclasses: the metaclass is now specified as a
Georg Brandl52b92cc2008-05-25 09:43:03 +0000771 keyword arg in the class statement, which can now use the full
772 syntax of a parameter list. Also, the metaclass can implement a
773 __prepare__ function which will be called to create the dictionary
774 for the new class namespace.
Georg Brandl801dd732007-03-18 20:18:31 +0000775
Georg Brandl428f0642007-03-18 18:35:15 +0000776- The long-deprecated argument "pend" of PyFloat_FromString() has been
777 removed.
778
Georg Brandle32b4222007-03-10 22:13:27 +0000779- The dir() function has been extended to call the __dir__() method on
Georg Brandl52b92cc2008-05-25 09:43:03 +0000780 its argument, if it exists. If not, it will work like before. This
781 allows customizing the output of dir() in the presence of a
782 __getattr__().
Brett Cannonba7bf492007-02-27 00:15:55 +0000783
Neal Norwitz8dfc4a92007-08-11 06:39:53 +0000784- Removed support for __members__ and __methods__.
785
Georg Brandle32b4222007-03-10 22:13:27 +0000786- Removed indexing/slicing on BaseException.
Neal Norwitz2633c692007-02-26 22:22:47 +0000787
Georg Brandle32b4222007-03-10 22:13:27 +0000788- input() became raw_input(): the name input() now implements the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000789 functionality formerly known as raw_input(); the name raw_input() is
790 no longer defined.
Guido van Rossum0240b922007-02-26 21:23:50 +0000791
Georg Brandl52b92cc2008-05-25 09:43:03 +0000792- Classes listed in an 'except' clause must inherit from
793 BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +0000794
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000795- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
Guido van Rossumcf1be882007-08-30 22:07:17 +0000796 and .keys(), .items(), .values() return dict views, which behave
797 like sets.
Guido van Rossumcc2b0162007-02-11 06:12:03 +0000798
Guido van Rossum8b545362007-02-09 23:52:14 +0000799- PEP 3105: print is now a function. Also (not in the PEP) the
Georg Brandl52b92cc2008-05-25 09:43:03 +0000800 'softspace' attribute of files is now gone (since print() doesn't
801 use it). A side effect of this change is that you can get
802 incomplete output lines in interactive sessions:
Guido van Rossum8b545362007-02-09 23:52:14 +0000803
804 >>> print(42, end="")
Kurt B. Kaiser2c7f3142007-08-30 21:52:19 +0000805 42>>>
Guido van Rossum8b545362007-02-09 23:52:14 +0000806
807 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +0000808
Brett Cannon398db8b2007-01-29 23:44:37 +0000809- PEP 3102: keyword-only arguments.
810
Georg Brandl52b92cc2008-05-25 09:43:03 +0000811- Int/Long unification is complete. The 'long' built-in type and
812 literals with trailing 'L' or 'l' have been removed. Performance
813 may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +0000814
815- 'except E, V' must now be spelled as 'except E as V' and deletes V
816 at the end of the except clause; V must be a simple name.
817
Neal Norwitzc1505362006-12-28 06:47:50 +0000818- Added function annotations per PEP 3107.
819
Georg Brandl52b92cc2008-05-25 09:43:03 +0000820- Added nonlocal declaration from PEP 3104:
Jeremy Hyltona4f9fc62007-02-27 15:53:28 +0000821
822 >>> def f(x):
823 ... def inc():
824 ... nonlocal x
825 ... x += 1
826 ... return x
827 ... return inc
828 ...
829 >>> inc = f(0)
830 >>> inc()
831 1
832 >>> inc()
833 2
834
Georg Brandl66a796e2006-12-19 20:50:34 +0000835- Moved intern() to sys.intern().
836
837- exec is now a function.
838
839- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +0000840
Neal Norwitz4886cc32006-08-21 17:06:07 +0000841- Classic classes are a thing of the past. All classes are new style.
842
843- Exceptions *must* derive from BaseException.
844
845- Integer division always returns a float. The -Q option is no more.
846 All the following are gone:
847 * PyNumber_Divide and PyNumber_InPlaceDivide
848 * __div__, __rdiv__, and __idiv__
849 * nb_divide, nb_inplace_divide
850 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
851 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
852 if we want to re-use __div__ and friends. If we do, it will make
853 it harder to write code for both 2.x and 3.x.)
854
855- 'as' and 'with' are keywords.
856
857- Absolute import is the default behavior for 'import foo' etc.
858
Georg Brandl52b92cc2008-05-25 09:43:03 +0000859- Removed support for syntax: backticks (ie, `x`), <>.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000860
Georg Brandl52b92cc2008-05-25 09:43:03 +0000861- Removed these Python builtins: apply(), callable(), coerce(),
862 execfile(), file(), reduce(), reload().
Neal Norwitz4886cc32006-08-21 17:06:07 +0000863
Georg Brandl52b92cc2008-05-25 09:43:03 +0000864- Removed these Python methods: {}.has_key.
Neal Norwitz378b2c92006-08-29 07:57:22 +0000865
Georg Brandl52b92cc2008-05-25 09:43:03 +0000866- Removed these opcodes: BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000867
868- Remove C API support for restricted execution.
869
Guido van Rossumcf1be882007-08-30 22:07:17 +0000870- zip(), map() and filter() now return iterators, behaving like their
Georg Brandl52b92cc2008-05-25 09:43:03 +0000871 itertools counterparts. This also affect map()'s behavior on
Guido van Rossumcf1be882007-08-30 22:07:17 +0000872 sequences of unequal length -- it now stops after the shortest one
873 is exhausted.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000874
Georg Brandl52b92cc2008-05-25 09:43:03 +0000875- Additions: set literals, set comprehensions, ellipsis literal.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000876
877- Added class decorators per PEP 3129.
878
879
880Extension Modules
881-----------------
882
Georg Brandl52b92cc2008-05-25 09:43:03 +0000883- Removed the imageop module. Obsolete long with its unit tests
884 becoming useless from the removal of rgbimg and imgfile.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000885
Georg Brandl52b92cc2008-05-25 09:43:03 +0000886- Removed these attributes from the operator module: div, idiv,
887 __div__, __idiv__, isCallable, sequenceIncludes.
888
889- Removed these attributes from the sys module: exc_clear(), exc_type,
890 exc_value, exc_traceback.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000891
892
893Library
894-------
895
Georg Brandl52b92cc2008-05-25 09:43:03 +0000896- Removed the compiler package. Use of the _ast module and (an
897 eventual) AST -> bytecode mechanism.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000898
Georg Brandl52b92cc2008-05-25 09:43:03 +0000899- Removed these modules: audiodev, Bastion, bsddb185, exceptions,
900 linuxaudiodev, md5, MimeWriter, mimify, popen2, rexec, sets, sha,
901 stringold, strop, sunaudiodev, timing, xmllib.
Guido van Rossum33d26892007-08-05 15:29:28 +0000902
Georg Brandl52b92cc2008-05-25 09:43:03 +0000903- Moved the toaiff module to Tools/Demos.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000904
Georg Brandl52b92cc2008-05-25 09:43:03 +0000905- Removed obsolete IRIX modules: al/AL, cd/CD, cddb, cdplayer, cl/CL,
906 DEVICE, ERRNO, FILE, fl/FL, flp, fm, GET, gl/GL, GLWS, IN, imgfile,
907 IOCTL, jpeg, panel, panelparser, readcd, sgi, sv/SV, torgb, WAIT.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000908
Georg Brandl52b92cc2008-05-25 09:43:03 +0000909- Removed obsolete functions: commands.getstatus(), os.popen*().
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000910
Georg Brandl52b92cc2008-05-25 09:43:03 +0000911- Removed functions in the string module that are also string methods;
Martin v. Löwis967f1e32007-08-14 09:23:10 +0000912 Remove string.{letters, lowercase, uppercase}.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000913
Georg Brandl52b92cc2008-05-25 09:43:03 +0000914- Removed support for long obsolete platforms: plat-aix3, plat-irix5.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000915
Georg Brandl52b92cc2008-05-25 09:43:03 +0000916- Removed xmlrpclib.SlowParser. It was based on xmllib.
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000917
918- Patch #1680961: atexit has been reimplemented in C.
919
Walter Dörwald41980ca2007-08-16 21:55:45 +0000920- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
921
Guido van Rossumd59da4b2007-05-22 18:11:13 +0000922Build
923-----
924
925C API
926-----
927
Georg Brandl52b92cc2008-05-25 09:43:03 +0000928- Removed these Python slots: __coerce__, __div__, __idiv__, __rdiv__.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000929
Georg Brandl52b92cc2008-05-25 09:43:03 +0000930- Removed these C APIs: PyNumber_Coerce(), PyNumber_CoerceEx(),
931 PyMember_Get, PyMember_Set.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000932
Georg Brandl52b92cc2008-05-25 09:43:03 +0000933- Removed these C slots/fields: nb_divide, nb_inplace_divide.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000934
Georg Brandl52b92cc2008-05-25 09:43:03 +0000935- Removed these macros: staticforward, statichere, PyArg_GetInt,
936 PyArg_NoArgs, _PyObject_Del.
Neal Norwitz4886cc32006-08-21 17:06:07 +0000937
Georg Brandl52b92cc2008-05-25 09:43:03 +0000938- Removed these typedefs: intargfunc, intintargfunc, intobjargproc,
939 intintobjargproc, getreadbufferproc, getwritebufferproc,
940 getsegcountproc, getcharbufferproc, memberlist.
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000941
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000942Tests
943-----
944
Brett Cannone7a30f72008-03-03 03:36:27 +0000945- Removed test.testall as test.regrtest replaces it.
946
Brett Cannonced04e02005-02-13 22:53:22 +0000947Documentation
948-------------
949
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000950Mac
951---
952
Georg Brandl52b92cc2008-05-25 09:43:03 +0000953- The cfmfile module was removed.
Guido van Rossume7ba4952007-06-06 23:52:48 +0000954
Guido van Rossum845702c2007-08-30 18:44:53 +0000955Platforms
956---------
957
958- Support for BeOS and AtheOS was removed (according to PEP 11).
959
960- Support for RiscOS, Irix, Tru64 was removed (alledgedly).
961
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000962Tools/Demos
963-----------
964
Georg Brandl52b92cc2008-05-25 09:43:03 +0000965
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000966**(For information about older versions, consult the HISTORY file.)**