blob: a933540d879c7529a92e5d8b334cd5822cf3b489 [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 Warsaw97f005d2008-12-03 16:46:14 +00007What's New in Python 3.1 alpha 0
8================================
Barry Warsawd8ccd1c2008-11-21 15:13:37 +00009
Antoine Pitrou3ad3a0d2008-12-18 17:08:32 +000010*Release date: XX-XXX-200X*
Barry Warsawd8ccd1c2008-11-21 15:13:37 +000011
12Core and Builtins
13-----------------
14
Martin v. Löwis5c88d812009-01-02 20:47:48 +000015- Issue #4075: Use OutputDebugStringW in Py_FatalError.
16
Amaury Forgeot d'Arc374e2202009-01-01 23:05:36 +000017- Issue #4747: When the terminal does not use utf-8, executing a script with
18 non-ascii characters in its name could fail with a "SyntaxError: None" error.
19
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +000020- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
Hirokazu Yamamoto8ed9a802009-01-01 16:09:52 +000021 file with `bytes' filename on Windows.
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +000022
Antoine Pitrou7ddda782009-01-01 15:35:33 +000023- Issue #3680: Reference cycles created through a dict, set or deque iterator
24 did not get collected.
25
Nick Coghlanf1f2f682008-12-30 07:29:12 +000026- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
27 where the tp_hash and tp_dict slots are both NULL.
28
Georg Brandlccc47b62008-12-28 11:44:14 +000029- Issue #4759: None is now allowed as the first argument of
30 bytearray.translate(). It was always allowed for bytes.translate().
31
Skip Montanaro80072cb2008-12-23 03:51:14 +000032- Added test case to ensure attempts to read from a file opened for writing
33 fail.
34
Antoine Pitrou51f3ef92008-12-20 13:14:23 +000035- Issue #3106: Speedup some comparisons (str/str and int/int).
36
Antoine Pitrouf289ae62008-12-18 11:06:25 +000037- Issue #2183: Simplify and optimize bytecode for list, dict and set
38 comprehensions. Original patch for list comprehensions by Neal Norwitz.
39
Antoine Pitrou621601a2008-12-17 23:18:19 +000040- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
41 print elapsed times, not only when some objects are uncollectable /
42 unreachable. Original patch by Neil Schemenauer.
43
Mark Dickinson54bc1ec2008-12-17 16:19:07 +000044- Issue #3439: Add a bit_length method to int.
45
Mark Dickinsonda2706b2008-12-11 18:03:03 +000046- Issue #2173: When getting device encoding, check that return value of
47 nl_langinfo is not the empty string. This was causing silent build
48 failures on OS X.
49
Jeffrey Yasskinb9083f32008-12-11 06:18:33 +000050- Issue #4597: Fixed several opcodes that weren't always propagating
51 exceptions.
52
53- Issue #4589: Fixed exception handling when the __exit__ function of a
Amaury Forgeot d'Arc10b24e82008-12-10 23:49:33 +000054 context manager returns a value that cannot be converted to a bool.
55
Mark Dickinsonfd24b322008-12-06 15:33:31 +000056- Issue #4445: Replace "sizeof(PyBytesObject)" with
57 "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
58 bytes instances. On a typical machine this saves 3 bytes of memory
59 (on average) per allocation of a bytes instance.
60
Christian Heimesa872de52008-12-05 08:26:55 +000061- Issue #4533: File read operation was dreadfully slow due to a slowly
62 growing read buffer. Fixed by using the same growth rate algorithm as
63 Python 2.x.
64
Antoine Pitrou5504e892008-12-06 21:27:53 +000065- Issue #4509: Various issues surrounding resize of bytearray objects to
66 which there are buffer exports (e.g. memoryview instances).
67
Georg Brandlf9734072008-12-07 15:30:06 +000068- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
69 method on file objects with closefd=False. The file descriptor is still
70 kept open but the file object behaves like a closed file. The ``FileIO``
71 object also got a new readonly attribute ``closefd``.
Matthias Klose7e1b8fa2008-11-26 17:22:04 +000072
Antoine Pitroubc420402008-12-07 20:14:49 +000073- Issue #4569: Interpreter crash when mutating a memoryview with an item size
74 larger than 1.
75
Benjamin Peterson371ccfb2008-12-27 19:03:36 +000076- Issue #4748: Lambda generators no longer return a value.
77
Barry Warsawd8ccd1c2008-11-21 15:13:37 +000078Library
79-------
80
Tarek Ziadé9df8ce32008-12-30 23:09:20 +000081- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
82 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
83
Tarek Ziadé4450dcf2008-12-29 22:38:38 +000084- Issue #4646: distutils was choking on empty options arg in the setup
85 function. Original patch by Thomas Heller.
86
Martin v. Löwis1f1620e2008-12-29 16:27:13 +000087- Issue #3767: Convert Tk object to string in tkColorChooser.
88
Martin v. Löwise354d782008-12-29 16:03:04 +000089- Issue #3248: Allow placing ScrolledText in a PanedWindow.
90
Antoine Pitrou5acd41e2008-12-28 14:29:00 +000091- Issue #4444: Allow assertRaises() to be used as a context handler, so that
92 the code under test can be written inline if more practical.
93
Georg Brandldb7b6b92009-01-01 15:53:14 +000094- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
95 works as expected in the interactive environment.
96
Antoine Pitroudb5fe662008-12-27 15:50:40 +000097- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
98 Gabriel Genellina.
99
Antoine Pitrou180a3362008-12-14 16:36:46 +0000100- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
101 boundary.
102
Nick Coghlanf088e5e2008-12-14 11:50:48 +0000103- Issue #4223: inspect.getsource() will now correctly display source code
104 for packages loaded via zipimport (or any other conformant PEP 302
105 loader). Original patch by Alexander Belopolsky.
106
107- Issue #4201: pdb can now access and display source code loaded via
108 zipimport (or any other conformant PEP 302 loader). Original patch by
109 Alexander Belopolsky.
110
111- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
112 302 conformant loader) will now work correctly in most cases (they
113 are still subject to the constraints that exist for all code running
114 from inside a module loaded via a PEP 302 loader and attempting to
115 perform IO operations based on __file__). Original patch by
116 Alexander Belopolsky.
117
118- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
119 allows backporting to maintenance branches. Original patch by
120 Alexander Belopolsky.
121
Antoine Pitrou7c59bc62008-12-13 23:20:54 +0000122- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
123 a non-ASCII letter.
124
Lars Gustäbel43fcf3a2008-12-12 14:58:38 +0000125- Issue #4616: TarFile.utime(): Restore directory times on Windows.
126
Benjamin Peterson433f32c2008-12-12 01:25:05 +0000127- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
128 codec cannot be found. This is for compatibility with the builtin behavior.
129
Facundo Batista708d5812008-12-11 04:20:07 +0000130- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
131 give correct results in the case where one argument is a quiet NaN
132 and the other is a finite number that requires rounding.
133
Skip Montanaroc1ce2862008-12-06 17:25:02 +0000134- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
135 libs.
136
Georg Brandlf9734072008-12-07 15:30:06 +0000137- Added the subprocess.check_call_output() convenience function to get output
138 from a subprocess on success or raise an exception on error.
139
140- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
141 support unusual filenames (such as those containing semi-colons) in
142 Content-Disposition headers.
143
144- Issue #4384: Added logging integration with warnings module using
145 captureWarnings(). This change includes a NullHandler which does nothing;
146 it will be of use to library developers who want to avoid the "No handlers
147 could be found for logger XXX" message which can appear if the library user
148 doesn't configure logging.
149
150- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
151 exception.
152
Georg Brandleee31162008-12-07 15:15:22 +0000153- Issue #4529: fix the parser module's validation of try-except-finally
154 statements.
155
156- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
157 not a malformed option.
158
159- Added the subprocess.check_output() convenience function to get output
160 from a subprocess on success or raise an exception on error.
161
Amaury Forgeot d'Arcbc9d4742008-12-05 01:40:43 +0000162- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
163 the corresponding tests now pass.
164
Amaury Forgeot d'Arcbc2ce572008-12-05 01:02:21 +0000165- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
166 it was calling the wrong open() function.
167
Fred Drake9a0a65b2008-12-04 19:24:50 +0000168- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
169 support unusual filenames (such as those containing semi-colons) in
170 Content-Disposition headers.
171
Antoine Pitrou2a013ea2008-12-27 20:39:28 +0000172Tools/Demos
173-----------
174
175- Issue #4677: add two list comprehension tests to pybench.
176
Mark Dickinsone675f082008-12-11 21:56:00 +0000177Extension Modules
178-----------------
179
Martin v. Löwis5c88d812009-01-02 20:47:48 +0000180- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
181
Antoine Pitrou31f30b12009-01-02 17:34:35 +0000182- Issue #4738: Each zlib object now has a separate lock, allowing to compress
183 or decompress several streams at once on multi-CPU systems. Also, the GIL
184 is now released when computing the CRC of a large buffer. Patch by ebfe.
185
Martin v. Löwis05bfe1f2008-12-29 18:21:47 +0000186- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
187
Mark Dickinsone675f082008-12-11 21:56:00 +0000188- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
189 OpenBSD.
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +0000190
Antoine Pitrou3ad3a0d2008-12-18 17:08:32 +0000191- Issue #4583: array.array would not always prohibit resizing when a buffer
192 has been exported, resulting in an interpreter crash when accessing the
193 buffer.
194
Martin v. Löwis841edad2008-11-30 10:36:49 +0000195Build
196-----
197
Martin v. Löwis841edad2008-11-30 10:36:49 +0000198
Brett Cannon7317c1e2008-11-25 19:19:17 +0000199Docs
200----
201
Georg Brandl52b92cc2008-05-25 09:43:03 +0000202
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000203**(For information about older versions, consult the HISTORY file.)**