blob: 495dd3e5014ef413bc1e49ae6b9f67bf30a3e69f [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
Antoine Pitrouc3b39242009-01-03 16:59:18 +000015- Issue #4580: Fix slicing of memoryviews when the item size is greater than
16 one byte. Also fixes the meaning of len() so that it returns the number of
17 items, rather than the size in bytes.
18
Martin v. Löwis5c88d812009-01-02 20:47:48 +000019- Issue #4075: Use OutputDebugStringW in Py_FatalError.
20
Amaury Forgeot d'Arc374e2202009-01-01 23:05:36 +000021- Issue #4747: When the terminal does not use utf-8, executing a script with
22 non-ascii characters in its name could fail with a "SyntaxError: None" error.
23
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +000024- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
Hirokazu Yamamoto8ed9a802009-01-01 16:09:52 +000025 file with `bytes' filename on Windows.
Hirokazu Yamamoto0f22d692009-01-01 16:03:45 +000026
Antoine Pitrou7ddda782009-01-01 15:35:33 +000027- Issue #3680: Reference cycles created through a dict, set or deque iterator
28 did not get collected.
29
Nick Coghlanf1f2f682008-12-30 07:29:12 +000030- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
31 where the tp_hash and tp_dict slots are both NULL.
32
Georg Brandlccc47b62008-12-28 11:44:14 +000033- Issue #4759: None is now allowed as the first argument of
34 bytearray.translate(). It was always allowed for bytes.translate().
35
Skip Montanaro80072cb2008-12-23 03:51:14 +000036- Added test case to ensure attempts to read from a file opened for writing
37 fail.
38
Antoine Pitrou51f3ef92008-12-20 13:14:23 +000039- Issue #3106: Speedup some comparisons (str/str and int/int).
40
Antoine Pitrouf289ae62008-12-18 11:06:25 +000041- Issue #2183: Simplify and optimize bytecode for list, dict and set
42 comprehensions. Original patch for list comprehensions by Neal Norwitz.
43
Antoine Pitrou621601a2008-12-17 23:18:19 +000044- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
45 print elapsed times, not only when some objects are uncollectable /
46 unreachable. Original patch by Neil Schemenauer.
47
Mark Dickinson54bc1ec2008-12-17 16:19:07 +000048- Issue #3439: Add a bit_length method to int.
49
Mark Dickinsonda2706b2008-12-11 18:03:03 +000050- Issue #2173: When getting device encoding, check that return value of
51 nl_langinfo is not the empty string. This was causing silent build
52 failures on OS X.
53
Jeffrey Yasskinb9083f32008-12-11 06:18:33 +000054- Issue #4597: Fixed several opcodes that weren't always propagating
55 exceptions.
56
57- Issue #4589: Fixed exception handling when the __exit__ function of a
Amaury Forgeot d'Arc10b24e82008-12-10 23:49:33 +000058 context manager returns a value that cannot be converted to a bool.
59
Mark Dickinsonfd24b322008-12-06 15:33:31 +000060- Issue #4445: Replace "sizeof(PyBytesObject)" with
61 "offsetof(PyBytesObject, ob_sval) + 1" when allocating memory for
62 bytes instances. On a typical machine this saves 3 bytes of memory
63 (on average) per allocation of a bytes instance.
64
Christian Heimesa872de52008-12-05 08:26:55 +000065- Issue #4533: File read operation was dreadfully slow due to a slowly
66 growing read buffer. Fixed by using the same growth rate algorithm as
67 Python 2.x.
68
Antoine Pitrou5504e892008-12-06 21:27:53 +000069- Issue #4509: Various issues surrounding resize of bytearray objects to
70 which there are buffer exports (e.g. memoryview instances).
71
Georg Brandlf9734072008-12-07 15:30:06 +000072- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
73 method on file objects with closefd=False. The file descriptor is still
74 kept open but the file object behaves like a closed file. The ``FileIO``
75 object also got a new readonly attribute ``closefd``.
Matthias Klose7e1b8fa2008-11-26 17:22:04 +000076
Antoine Pitroubc420402008-12-07 20:14:49 +000077- Issue #4569: Interpreter crash when mutating a memoryview with an item size
78 larger than 1.
79
Benjamin Peterson371ccfb2008-12-27 19:03:36 +000080- Issue #4748: Lambda generators no longer return a value.
81
Barry Warsawd8ccd1c2008-11-21 15:13:37 +000082Library
83-------
84
Mark Dickinson315a20a2009-01-04 21:34:18 +000085- Restore Python 2.3 compatibility for decimal.py.
86
Guilherme Polo3f5f8222009-01-03 22:00:39 +000087- Issue #3638: Remove functions from _tkinter module level that depend on
88 TkappObject to work with multiple threads.
89
Antoine Pitrou38a66ad2009-01-03 18:41:49 +000090- Issue #4718: Adapt the wsgiref package so that it actually works with
91 Python 3.x, in accordance with the `official amendments of the spec
92 <http://www.wsgi.org/wsgi/Amendments_1.0>`_.
93
Raymond Hettinger771ed762009-01-03 19:20:32 +000094- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
95 to the decimal module.
96
Georg Brandl3a9b0622009-01-03 22:07:57 +000097- Fractions.from_float() no longer loses precision for integers too big to
98 cast as floats.
99
Mark Dickinsonf9236412009-01-02 23:23:21 +0000100- Issue #4812: add missing underscore prefix to some internal-use-only
101 constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
102
Georg Brandl3a9b0622009-01-03 22:07:57 +0000103- Issue 4790: The nsmallest() and nlargest() functions in the heapq module
104 did unnecessary work in the common case where no key function was specified.
105
Georg Brandlb1441c72009-01-03 22:33:39 +0000106- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
107 the function is not a generator.
108
Tarek Ziadé9df8ce32008-12-30 23:09:20 +0000109- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
110 no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
111
Tarek Ziadé4450dcf2008-12-29 22:38:38 +0000112- Issue #4646: distutils was choking on empty options arg in the setup
113 function. Original patch by Thomas Heller.
114
Martin v. Löwis1f1620e2008-12-29 16:27:13 +0000115- Issue #3767: Convert Tk object to string in tkColorChooser.
116
Martin v. Löwise354d782008-12-29 16:03:04 +0000117- Issue #3248: Allow placing ScrolledText in a PanedWindow.
118
Antoine Pitrou5acd41e2008-12-28 14:29:00 +0000119- Issue #4444: Allow assertRaises() to be used as a context handler, so that
120 the code under test can be written inline if more practical.
121
Georg Brandldb7b6b92009-01-01 15:53:14 +0000122- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
123 works as expected in the interactive environment.
124
Antoine Pitroudb5fe662008-12-27 15:50:40 +0000125- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
126 Gabriel Genellina.
127
Antoine Pitrou180a3362008-12-14 16:36:46 +0000128- Issue #4574: reading an UTF16-encoded text file crashes if \r on 64-char
129 boundary.
130
Nick Coghlanf088e5e2008-12-14 11:50:48 +0000131- Issue #4223: inspect.getsource() will now correctly display source code
132 for packages loaded via zipimport (or any other conformant PEP 302
133 loader). Original patch by Alexander Belopolsky.
134
135- Issue #4201: pdb can now access and display source code loaded via
136 zipimport (or any other conformant PEP 302 loader). Original patch by
137 Alexander Belopolsky.
138
139- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
140 302 conformant loader) will now work correctly in most cases (they
141 are still subject to the constraints that exist for all code running
142 from inside a module loaded via a PEP 302 loader and attempting to
143 perform IO operations based on __file__). Original patch by
144 Alexander Belopolsky.
145
146- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
147 allows backporting to maintenance branches. Original patch by
148 Alexander Belopolsky.
149
Antoine Pitrou7c59bc62008-12-13 23:20:54 +0000150- Issue #4163: textwrap module: allow word splitting on a hyphen preceded by
151 a non-ASCII letter.
152
Lars Gustäbel43fcf3a2008-12-12 14:58:38 +0000153- Issue #4616: TarFile.utime(): Restore directory times on Windows.
154
Benjamin Peterson433f32c2008-12-12 01:25:05 +0000155- Issue #4021: tokenize.detect_encoding() now raises a SyntaxError when the
156 codec cannot be found. This is for compatibility with the builtin behavior.
157
Facundo Batista708d5812008-12-11 04:20:07 +0000158- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
159 give correct results in the case where one argument is a quiet NaN
160 and the other is a finite number that requires rounding.
161
Skip Montanaroc1ce2862008-12-06 17:25:02 +0000162- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
163 libs.
164
Georg Brandlf9734072008-12-07 15:30:06 +0000165- Added the subprocess.check_call_output() convenience function to get output
166 from a subprocess on success or raise an exception on error.
167
168- 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
172- Issue #4384: Added logging integration with warnings module using
173 captureWarnings(). This change includes a NullHandler which does nothing;
174 it will be of use to library developers who want to avoid the "No handlers
175 could be found for logger XXX" message which can appear if the library user
176 doesn't configure logging.
177
178- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an
179 exception.
180
Georg Brandleee31162008-12-07 15:15:22 +0000181- Issue #4529: fix the parser module's validation of try-except-finally
182 statements.
183
184- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
185 not a malformed option.
186
187- Added the subprocess.check_output() convenience function to get output
188 from a subprocess on success or raise an exception on error.
189
Amaury Forgeot d'Arcbc9d4742008-12-05 01:40:43 +0000190- Issue #4542: On Windows, binascii.crc32 still accepted str as binary input;
191 the corresponding tests now pass.
192
Amaury Forgeot d'Arcbc2ce572008-12-05 01:02:21 +0000193- Issue #4537: webbrowser.UnixBrowser would fail to open the browser because
194 it was calling the wrong open() function.
195
Fred Drake9a0a65b2008-12-04 19:24:50 +0000196- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
197 support unusual filenames (such as those containing semi-colons) in
198 Content-Disposition headers.
199
Antoine Pitrou2a013ea2008-12-27 20:39:28 +0000200Tools/Demos
201-----------
202
203- Issue #4677: add two list comprehension tests to pybench.
204
Georg Brandlb1441c72009-01-03 22:33:39 +0000205
206Build
207-----
208
209- Issue #4472: "configure --enable-shared" now works on OSX
210
211- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
212
213- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".
214
215- Issue #4289: Remove Cancel button from AdvancedDlg.
216
217- Issue #1656675: Register a drop handler for .py* files on Windows.
218
219- Issue #4120: Exclude manifest from extension modules in VS2008.
220
221- Issue #4091: Install pythonxy.dll in system32 again.
222
223- Issue #4018: Disable "for me" installations on Vista.
224
225- Issue #3758: Add ``patchcheck`` build target to .PHONY.
226
227- Issue #4204: Fixed module build errors on FreeBSD 4.
228
229
230C-API
231-----
232
233- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
234
235- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
236 the GIL is released, or owned by another thread.
237
238- Issue #4122: On Windows, fix a compilation error when using the
239 Py_UNICODE_ISSPACE macro in an extension module.
240
241
Mark Dickinsone675f082008-12-11 21:56:00 +0000242Extension Modules
243-----------------
244
Martin v. Löwis5c88d812009-01-02 20:47:48 +0000245- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
246
Antoine Pitrou31f30b12009-01-02 17:34:35 +0000247- Issue #4738: Each zlib object now has a separate lock, allowing to compress
248 or decompress several streams at once on multi-CPU systems. Also, the GIL
249 is now released when computing the CRC of a large buffer. Patch by ebfe.
250
Georg Brandlb1441c72009-01-03 22:33:39 +0000251- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
252
Martin v. Löwis05bfe1f2008-12-29 18:21:47 +0000253- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
254
Mark Dickinsone675f082008-12-11 21:56:00 +0000255- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
256 OpenBSD.
Amaury Forgeot d'Arcefae8c42008-11-21 23:08:09 +0000257
Antoine Pitrou3ad3a0d2008-12-18 17:08:32 +0000258- Issue #4583: array.array would not always prohibit resizing when a buffer
259 has been exported, resulting in an interpreter crash when accessing the
260 buffer.
261
Martin v. Löwis841edad2008-11-30 10:36:49 +0000262
Brett Cannon7317c1e2008-11-25 19:19:17 +0000263Docs
264----
265
Georg Brandl52b92cc2008-05-25 09:43:03 +0000266
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000267**(For information about older versions, consult the HISTORY file.)**