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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
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +000015- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
16 file with `str' filename on Windows.
17
Antoine Pitrou7ddda782009-01-01 15:35:33 +000018- Issue #3680: Reference cycles created through a dict, set or deque iterator
19 did not get collected.
20
Nick Coghlanf1f2f682008-12-30 07:29:12 +000021- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
22 where the tp_hash and tp_dict slots are both NULL.
23
Georg Brandlccc47b62008-12-28 11:44:14 +000024- Issue #4759: None is now allowed as the first argument of
25 bytearray.translate(). It was always allowed for bytes.translate().
26
Skip Montanaro80072cb2008-12-23 03:51:14 +000027- Added test case to ensure attempts to read from a file opened for writing
28 fail.
29
Antoine Pitrou51f3ef92008-12-20 13:14:23 +000030- Issue #3106: Speedup some comparisons (str/str and int/int).
31
Antoine Pitrouf289ae62008-12-18 11:06:25 +000032- Issue #2183: Simplify and optimize bytecode for list, dict and set
33 comprehensions. Original patch for list comprehensions by Neal Norwitz.
34
Antoine Pitrou621601a2008-12-17 23:18:19 +000035- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
36 print elapsed times, not only when some objects are uncollectable /
37 unreachable. Original patch by Neil Schemenauer.
38
Mark Dickinson54bc1ec2008-12-17 16:19:07 +000039- Issue #3439: Add a bit_length method to int.
40
Mark Dickinsonda2706b2008-12-11 18:03:03 +000041- Issue #2173: When getting device encoding, check that return value of
42 nl_langinfo is not the empty string. This was causing silent build
43 failures on OS X.
44
Jeffrey Yasskinb9083f32008-12-11 06:18:33 +000045- Issue #4597: Fixed several opcodes that weren't always propagating
46 exceptions.
47
48- Issue #4589: Fixed exception handling when the __exit__ function of a
Amaury Forgeot d'Arc10b24e82008-12-10 23:49:33 +000049 context manager returns a value that cannot be converted to a bool.
50
Mark Dickinsonfd24b322008-12-06 15:33:31 +000051- Issue #4445: Replace "sizeof(PyBytesObject)" with
52 "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
53 bytes instances. On a typical machine this saves 3 bytes of memory
54 (on average) per allocation of a bytes instance.
55
Christian Heimesa872de52008-12-05 08:26:55 +000056- Issue #4533: File read operation was dreadfully slow due to a slowly
57 growing read buffer. Fixed by using the same growth rate algorithm as
58 Python 2.x.
59
Antoine Pitrou5504e892008-12-06 21:27:53 +000060- Issue #4509: Various issues surrounding resize of bytearray objects to
61 which there are buffer exports (e.g. memoryview instances).
62
Georg Brandlf9734072008-12-07 15:30:06 +000063- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
64 method on file objects with closefd=False. The file descriptor is still
65 kept open but the file object behaves like a closed file. The ``FileIO``
66 object also got a new readonly attribute ``closefd``.
Matthias Klose7e1b8fa2008-11-26 17:22:04 +000067
Antoine Pitroubc420402008-12-07 20:14:49 +000068- Issue #4569: Interpreter crash when mutating a memoryview with an item size
69 larger than 1.
70
Benjamin Peterson371ccfb2008-12-27 19:03:36 +000071- Issue #4748: Lambda generators no longer return a value.
72
Barry Warsawd8ccd1c2008-11-21 15:13:37 +000073Library
74-------
75
Tarek Ziadé9df8ce32008-12-30 23:09:20 +000076- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
77 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
78
Tarek Ziadé4450dcf2008-12-29 22:38:38 +000079- Issue #4646: distutils was choking on empty options arg in the setup
80 function. Original patch by Thomas Heller.
81
Martin v. Löwis1f1620e2008-12-29 16:27:13 +000082- Issue #3767: Convert Tk object to string in tkColorChooser.
83
Martin v. Löwise354d782008-12-29 16:03:04 +000084- Issue #3248: Allow placing ScrolledText in a PanedWindow.
85
Antoine Pitrou5acd41e2008-12-28 14:29:00 +000086- Issue #4444: Allow assertRaises() to be used as a context handler, so that
87 the code under test can be written inline if more practical.
88
Georg Brandldb7b6b92009-01-01 15:53:14 +000089- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
90 works as expected in the interactive environment.
91
Antoine Pitroudb5fe662008-12-27 15:50:40 +000092- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
93 Gabriel Genellina.
94
Antoine Pitrou180a3362008-12-14 16:36:46 +000095- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
96 boundary.
97
Nick Coghlanf088e5e2008-12-14 11:50:48 +000098- Issue #4223: inspect.getsource() will now correctly display source code
99 for packages loaded via zipimport (or any other conformant PEP 302
100 loader). Original patch by Alexander Belopolsky.
101
102- Issue #4201: pdb can now access and display source code loaded via
103 zipimport (or any other conformant PEP 302 loader). Original patch by
104 Alexander Belopolsky.
105
106- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
107 302 conformant loader) will now work correctly in most cases (they
108 are still subject to the constraints that exist for all code running
109 from inside a module loaded via a PEP 302 loader and attempting to
110 perform IO operations based on __file__). Original patch by
111 Alexander Belopolsky.
112
113- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
114 allows backporting to maintenance branches. Original patch by
115 Alexander Belopolsky.
116
Antoine Pitrou7c59bc62008-12-13 23:20:54 +0000117- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
118 a non-ASCII letter.
119
Lars Gustäbel43fcf3a2008-12-12 14:58:38 +0000120- Issue #4616: TarFile.utime(): Restore directory times on Windows.
121
Benjamin Peterson433f32c2008-12-12 01:25:05 +0000122- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
123 codec cannot be found. This is for compatibility with the builtin behavior.
124
Facundo Batista708d5812008-12-11 04:20:07 +0000125- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
126 give correct results in the case where one argument is a quiet NaN
127 and the other is a finite number that requires rounding.
128
Skip Montanaroc1ce2862008-12-06 17:25:02 +0000129- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
130 libs.
131
Georg Brandlf9734072008-12-07 15:30:06 +0000132- Added the subprocess.check_call_output() convenience function to get output
133 from a subprocess on success or raise an exception on error.
134
135- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
136 support unusual filenames (such as those containing semi-colons) in
137 Content-Disposition headers.
138
139- Issue #4384: Added logging integration with warnings module using
140 captureWarnings(). This change includes a NullHandler which does nothing;
141 it will be of use to library developers who want to avoid the "No handlers
142 could be found for logger XXX" message which can appear if the library user
143 doesn't configure logging.
144
145- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
146 exception.
147
Georg Brandleee31162008-12-07 15:15:22 +0000148- Issue #4529: fix the parser module's validation of try-except-finally
149 statements.
150
151- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
152 not a malformed option.
153
154- Added the subprocess.check_output() convenience function to get output
155 from a subprocess on success or raise an exception on error.
156
Amaury Forgeot d'Arcbc9d4742008-12-05 01:40:43 +0000157- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
158 the corresponding tests now pass.
159
Amaury Forgeot d'Arcbc2ce572008-12-05 01:02:21 +0000160- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
161 it was calling the wrong open() function.
162
Fred Drake9a0a65b2008-12-04 19:24:50 +0000163- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
164 support unusual filenames (such as those containing semi-colons) in
165 Content-Disposition headers.
166
Antoine Pitrou2a013ea2008-12-27 20:39:28 +0000167Tools/Demos
168-----------
169
170- Issue #4677: add two list comprehension tests to pybench.
171
Mark Dickinsone675f082008-12-11 21:56:00 +0000172Extension Modules
173-----------------
174
Martin v. Löwis05bfe1f2008-12-29 18:21:47 +0000175- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
176
Mark Dickinsone675f082008-12-11 21:56:00 +0000177- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
178 OpenBSD.
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +0000179
Antoine Pitrou3ad3a0d2008-12-18 17:08:32 +0000180- Issue #4583: array.array would not always prohibit resizing when a buffer
181 has been exported, resulting in an interpreter crash when accessing the
182 buffer.
183
Martin v. Löwis841edad2008-11-30 10:36:49 +0000184Build
185-----
186
Martin v. Löwis841edad2008-11-30 10:36:49 +0000187
Brett Cannon7317c1e2008-11-25 19:19:17 +0000188Docs
189----
190
Georg Brandl52b92cc2008-05-25 09:43:03 +0000191
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000192**(For information about older versions, consult the HISTORY file.)**