cpython/Misc/NEWS.d/2.7a3.rst

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.. bpo: 5677
.. date: 7847
.. nonce: b0Qejz
.. release date: 2010-02-06
.. section: Core and Builtins
Explicitly forbid write operations on read-only file objects, and read
operations on write-only file objects. On Windows, the system C library
would return a bogus result; on Solaris, it was possible to crash the
interpreter. Patch by Stefan Krah.
..
.. bpo: 7853
.. date: 7846
.. nonce: 7BnJKC
.. section: Core and Builtins
Normalize exceptions before they are passed to a context manager's
``__exit__()`` method.
..
.. bpo: 7385
.. date: 7845
.. nonce: OVCbWd
.. section: Core and Builtins
Fix a crash in ``PyMemoryView_FromObject()`` when ``PyObject_GetBuffer()``
fails. Patch by Florent Xicluna.
..
.. bpo: 7819
.. date: 7844
.. nonce: tGsOrJ
.. section: Core and Builtins
Check ``sys.call_tracing()`` arguments types.
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.. bpo: 7788
.. date: 7843
.. nonce: 4T4M13
.. section: Core and Builtins
Fix an interpreter crash produced by deleting a list slice with very large
step value.
..
.. bpo: 7766
.. date: 7842
.. nonce: aejr9M
.. section: Core and Builtins
Change ``sys.getwindowsversion()`` return value to a named tuple and add the
additional members returned in an OSVERSIONINFOEX structure. The new
members are service_pack_major, service_pack_minor, suite_mask, and
product_type.
..
.. bpo: 7561
.. date: 7841
.. nonce: dYmand
.. section: Core and Builtins
Operations on empty bytearrays (such as ``int(bytearray())``) could crash in
many places because of the ``PyByteArray_AS_STRING()`` macro returning NULL.
The macro now returns a statically allocated empty string instead.
..
.. bpo: 7622
.. date: 7840
.. nonce: yL5cXb
.. section: Core and Builtins
Improve the split(), rsplit(), splitlines() and replace() methods of bytes,
bytearray and unicode objects by using a common implementation based on
stringlib's fast search. Patch by Florent Xicluna.
..
.. bpo: 7632
.. date: 7839
.. nonce: djAkIG
.. section: Core and Builtins
Fix various str -> float conversion bugs present in 2.7 alpha 2, including:
(1) a serious 'wrong output' bug that could occur for long (> 40 digit)
input strings, (2) a crash in dtoa.c that occurred in debug builds when
parsing certain long numeric strings corresponding to subnormal values,
(3) a memory leak for some values large enough to cause overflow, and (4) a
number of flaws that could lead to incorrectly rounded results.
..
.. bpo: 7319
.. date: 7838
.. nonce: CIP64d
.. section: Core and Builtins
Silence ``DeprecationWarning`` by default when the -3 option is not used.
(See also: bpo-7770)
..
.. bpo: 2335
.. date: 7837
.. nonce: NB-Xpf
.. section: Core and Builtins
Backport set literals syntax from Python 3.x.
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.. bpo: 2333
.. date: 7836
.. nonce: yWLBy3
.. section: Core and Builtins
Backport set and dict comprehensions syntax from Python 3.x.
..
.. bpo: 1967
.. date: 7835
.. nonce: RryGx3
.. section: Core and Builtins
Backport dictionary views from Python 3.x.
..
.. bpo: 9137
.. date: 7834
.. nonce: DgWODo
.. section: Library
Fix issue in MutableMapping.update, which incorrectly treated keyword
arguments called 'self' or 'other' specially.
..
.. bpo: 7835
.. date: 7833
.. nonce: jlbrK8
.. section: Library
shelve should no longer produce mysterious warnings during interpreter
shutdown.
..
.. bpo: 2746
.. date: 7832
.. nonce: F6UqCX
.. section: Library
Don't escape ampersands and angle brackets ("&", "<", ">") in XML processing
instructions and comments. These raw characters are allowed by the XML
specification, and are necessary when outputting e.g. PHP code in a
processing instruction. Patch by Neil Muller.
..
.. bpo: 7869
.. date: 7831
.. nonce: 1QS851
.. section: Library
logging: Improved diagnostic for format-time errors.
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.. bpo: 7868
.. date: 7830
.. nonce: PXTr9t
.. section: Library
logging: Added loggerClass attribute to Manager.
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.. bpo: 7851
.. date: 7829
.. nonce: 7OtUnx
.. section: Library
logging: Clarification on logging configuration files.
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.. bpo: 4772
.. date: 7828
.. nonce: 9_Y3av
.. section: Library
Raise a ValueError when an unknown Bluetooth protocol is specified, rather
than fall through to AF_PACKET (in the ``socket`` module). Also, raise
ValueError rather than TypeError when an unknown TIPC address type is
specified. Patch by Brian Curtin.
..
.. bpo: 0
.. date: 7827
.. nonce: DG4Srd
.. section: Library
logging: Implemented PEP 391.
..
.. bpo: 6939
.. date: 7826
.. nonce: 8fBhhK
.. section: Library
Fix file I/O objects in the `io` module to keep the original file position
when calling `truncate()`. It would previously change the file position to
the given argument, which goes against the tradition of ftruncate() and
other truncation APIs. Patch by Pascal Chambon.
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.. bpo: 7610
.. date: 7825
.. nonce: 2DXmYZ
.. section: Library
Reworked implementation of the internal ``zipfile.ZipExtFile`` class used to
represent files stored inside an archive. The new implementation is
significantly faster and can be wrapped in an ``io.BufferedReader`` object
for more speedups. It also solves an issue where interleaved calls to
``read()`` and ``readline()`` give wrong results. Patch by Nir Aides.
..
.. bpo: 7792
.. date: 7824
.. nonce: ncH8BS
.. section: Library
Registering non-classes to ABCs raised an obscure error.
..
.. bpo: 0
.. date: 7823
.. nonce: RpNACh
.. section: Library
Removed the deprecated functions ``verify()`` and ``vereq()`` from
Lib/test/test_support.py.
..
.. bpo: 7773
.. date: 7822
.. nonce: x2tWld
.. section: Library
Fix an UnboundLocalError in ``platform.linux_distribution()`` when the
release file is empty.
..
.. bpo: 7748
.. date: 7821
.. nonce: YlAgV-
.. section: Library
Since unicode values are supported for some metadata options in Distutils,
the DistributionMetadata get_* methods will now return a utf-8 encoded
string for them. This ensures that the upload and register commands send
the correct values to PyPI without any error.
..
.. bpo: 1670765
.. date: 7820
.. nonce: 9eCqJl
.. section: Library
Prevent ``email.generator.Generator`` from re-wrapping headers in
multipart/signed MIME parts, which fixes one of the sources of invalid
modifications to such parts by Generator.
..
.. bpo: 7701
.. date: 7819
.. nonce: e9a5VO
.. section: Library
Fix crash in ``binascii.b2a_uu()`` in debug mode when given a 1-byte
argument. Patch by Victor Stinner.
..
.. bpo: 3299
.. date: 7818
.. nonce: AzzK85
.. section: Library
Fix possible crash in the _sre module when given bad argument values in
debug mode. Patch by Victor Stinner.
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.. bpo: 7703
.. date: 7817
.. nonce: FNoqUO
.. section: Library
Add support for the new buffer API to functions of the binascii module.
Backported from py3k by Florent Xicluna, with some additional tests.
..
.. bpo: 2846
.. date: 7816
.. nonce: 1yXo1U
.. section: Library
Add support for gzip.GzipFile reading zero-padded files. Patch by Brian
Curtin.
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.. bpo: 5827
.. date: 7815
.. nonce: HqdXuX
.. section: Library
Make sure that normpath preserves unicode. Initial patch by Matt Giuca.
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.. bpo: 5372
.. date: 7814
.. nonce: t3pYj8
.. section: Library
Drop the reuse of .o files in Distutils' ccompiler (since Extension extra
options may change the output without changing the .c file). Initial patch
by Collin Winter.
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.. bpo: 0
.. date: 7813
.. nonce: nL49In
.. section: Library
Expat: Fix DoS via XML document with malformed UTF-8 sequences
(CVE_2009_3560).
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.. bpo: 7632
.. date: 7812
.. nonce: AWDxJU
.. section: Build
When Py_USING_MEMORY_DEBUGGER is defined, disable the private memory
allocation scheme in dtoa.c and use PyMem_Malloc and PyMem_Free instead.
Also disable caching of powers of 5.
..
.. bpo: 7658
.. date: 7811
.. nonce: oUBbSZ
.. section: Build
Ensure that the new pythonw executable works on OSX 10.4
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.. bpo: 7714
.. date: 7810
.. nonce: 27wQ2M
.. section: Build
Use ``gcc -dumpversion`` to detect the version of GCC on MacOSX.
..
.. bpo: 7661
.. date: 7809
.. nonce: ggMDHr
.. section: Build
Allow ctypes to be built from a non-ASCII directory path. Patch by Florent
Xicluna.
..
.. bpo: 0
.. date: 7808
.. nonce: KgUrLn
.. section: Tools/Demos
iobench (a file I/O benchmark) and ccbench (a concurrency benchmark) were
added to the ``Tools`` directory. They were previously living in the
sandbox.
..
.. bpo: 7728
.. date: 7807
.. nonce: f9wo4c
.. section: Tests
test_timeout was changed to use ``test_support.bind_port()`` instead of a
hard coded port.
..
.. bpo: 0
.. date: 7806
.. nonce: Dx9g36
.. section: Documentation
Updated "Using Python" documentation to include description of CPython's -J,
-U and -X options.
..
.. bpo: 0
.. date: 7805
.. nonce: vllYdR
.. section: Documentation
Updated Python manual page (options -B, -O0, -s, environment variables
PYTHONDONTWRITEBYTECODE, PYTHONNOUSERSITE).