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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
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
Mark Dickinsonf9236412009-01-02 23:23:21 +000081- Issue #4812: add missing underscore prefix to some internal-use-only
82 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
83
Tarek Ziadé9df8ce32008-12-30 23:09:20 +000084- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
85 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
86
Tarek Ziadé4450dcf2008-12-29 22:38:38 +000087- Issue #4646: distutils was choking on empty options arg in the setup
88 function. Original patch by Thomas Heller.
89
Martin v. Löwis1f1620e2008-12-29 16:27:13 +000090- Issue #3767: Convert Tk object to string in tkColorChooser.
91
Martin v. Löwise354d782008-12-29 16:03:04 +000092- Issue #3248: Allow placing ScrolledText in a PanedWindow.
93
Antoine Pitrou5acd41e2008-12-28 14:29:00 +000094- Issue #4444: Allow assertRaises() to be used as a context handler, so that
95 the code under test can be written inline if more practical.
96
Georg Brandldb7b6b92009-01-01 15:53:14 +000097- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
98 works as expected in the interactive environment.
99
Antoine Pitroudb5fe662008-12-27 15:50:40 +0000100- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
101 Gabriel Genellina.
102
Antoine Pitrou180a3362008-12-14 16:36:46 +0000103- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
104 boundary.
105
Nick Coghlanf088e5e2008-12-14 11:50:48 +0000106- Issue #4223: inspect.getsource() will now correctly display source code
107 for packages loaded via zipimport (or any other conformant PEP 302
108 loader). Original patch by Alexander Belopolsky.
109
110- Issue #4201: pdb can now access and display source code loaded via
111 zipimport (or any other conformant PEP 302 loader). Original patch by
112 Alexander Belopolsky.
113
114- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
115 302 conformant loader) will now work correctly in most cases (they
116 are still subject to the constraints that exist for all code running
117 from inside a module loaded via a PEP 302 loader and attempting to
118 perform IO operations based on __file__). Original patch by
119 Alexander Belopolsky.
120
121- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
122 allows backporting to maintenance branches. Original patch by
123 Alexander Belopolsky.
124
Antoine Pitrou7c59bc62008-12-13 23:20:54 +0000125- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
126 a non-ASCII letter.
127
Lars Gustäbel43fcf3a2008-12-12 14:58:38 +0000128- Issue #4616: TarFile.utime(): Restore directory times on Windows.
129
Benjamin Peterson433f32c2008-12-12 01:25:05 +0000130- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
131 codec cannot be found. This is for compatibility with the builtin behavior.
132
Facundo Batista708d5812008-12-11 04:20:07 +0000133- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
134 give correct results in the case where one argument is a quiet NaN
135 and the other is a finite number that requires rounding.
136
Skip Montanaroc1ce2862008-12-06 17:25:02 +0000137- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
138 libs.
139
Georg Brandlf9734072008-12-07 15:30:06 +0000140- Added the subprocess.check_call_output() convenience function to get output
141 from a subprocess on success or raise an exception on error.
142
143- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
144 support unusual filenames (such as those containing semi-colons) in
145 Content-Disposition headers.
146
147- Issue #4384: Added logging integration with warnings module using
148 captureWarnings(). This change includes a NullHandler which does nothing;
149 it will be of use to library developers who want to avoid the "No handlers
150 could be found for logger XXX" message which can appear if the library user
151 doesn't configure logging.
152
153- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
154 exception.
155
Georg Brandleee31162008-12-07 15:15:22 +0000156- Issue #4529: fix the parser module's validation of try-except-finally
157 statements.
158
159- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
160 not a malformed option.
161
162- Added the subprocess.check_output() convenience function to get output
163 from a subprocess on success or raise an exception on error.
164
Amaury Forgeot d'Arcbc9d4742008-12-05 01:40:43 +0000165- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
166 the corresponding tests now pass.
167
Amaury Forgeot d'Arcbc2ce572008-12-05 01:02:21 +0000168- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
169 it was calling the wrong open() function.
170
Fred Drake9a0a65b2008-12-04 19:24:50 +0000171- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
172 support unusual filenames (such as those containing semi-colons) in
173 Content-Disposition headers.
174
Antoine Pitrou2a013ea2008-12-27 20:39:28 +0000175Tools/Demos
176-----------
177
178- Issue #4677: add two list comprehension tests to pybench.
179
Mark Dickinsone675f082008-12-11 21:56:00 +0000180Extension Modules
181-----------------
182
Martin v. Löwis5c88d812009-01-02 20:47:48 +0000183- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
184
Antoine Pitrou31f30b12009-01-02 17:34:35 +0000185- Issue #4738: Each zlib object now has a separate lock, allowing to compress
186 or decompress several streams at once on multi-CPU systems. Also, the GIL
187 is now released when computing the CRC of a large buffer. Patch by ebfe.
188
Martin v. Löwis05bfe1f2008-12-29 18:21:47 +0000189- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
190
Mark Dickinsone675f082008-12-11 21:56:00 +0000191- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
192 OpenBSD.
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +0000193
Antoine Pitrou3ad3a0d2008-12-18 17:08:32 +0000194- Issue #4583: array.array would not always prohibit resizing when a buffer
195 has been exported, resulting in an interpreter crash when accessing the
196 buffer.
197
Martin v. Löwis841edad2008-11-30 10:36:49 +0000198Build
199-----
200
Martin v. Löwis841edad2008-11-30 10:36:49 +0000201
Brett Cannon7317c1e2008-11-25 19:19:17 +0000202Docs
203----
204
Georg Brandl52b92cc2008-05-25 09:43:03 +0000205
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000206**(For information about older versions, consult the HISTORY file.)**