+++++++++++

Python News

+++++++++++

(editors: check NEWS.help for information about editing NEWS using ReST.)

What's New in Python 2.6.1

==========================

*Release date: 04-Dec-2008*

Core and Builtins

-----------------

- Issue #3996: On Windows, the PyOS_CheckStack function would cause the

interpreter to abort ("Fatal Python error: Could not reset the stack!")

instead of throwing a MemoryError.

- Issue #4367: Python would segfault during compiling when the unicodedata

module couldn't be imported and \N escapes were present.

- Issue #4348: Some bytearray methods returned that didn't cause any change to

the bytearray, returned the same bytearray instead of a copy.

- Issue #4317: Fixed a crash in the imageop.rgb2rgb8() function.

- Issue #4230: If ``__getattr__`` is a descriptor, it now functions correctly.

- Issue #4048: The parser module now correctly validates relative imports.

- Issue #4225: ``from __future__ import unicode_literals`` didn't work in an

exec statement.

- Issue #4176: Fixed a crash when pickling an object which ``__reduce__``

method does not return iterators for the 4th and 5th items.

- Issue #4209: Enabling unicode_literals and the print_function in the same

__future__ import didn't work.

- On windows, os.chdir given unicode was not working if GetCurrentDirectoryW

returned a path longer than MAX_PATH. (But It's doubtful this code path is

really executed because I cannot move to such directory on win2k)

- Issue #4069: When set.remove(element) is used with a set element, the element

is temporarily replaced with an equivalent frozenset. But the eventual

KeyError would always report the empty frozenset([]) as the missing key. Now

it correctly refers to the initial element.

- Fixed C99 style comments in several files. Python is now C89 compatible

again.

Library

-------

- Issue #3741: DISTUTILS_USE_SDK set causes msvc9compiler.py to raise an

exception.

- Issue #4363: The uuid.uuid1() and uuid.uuid4() functions now work even if

the ctypes module is not present.

- Issue #4116: Resolve member name conflict in ScrolledCanvas.__init__.

- Issue #3774: Fixed an error when create a Tkinter menu item without command

and then remove it.

- Fixed a modulefinder crash on certain relative imports.

- Issue #4150: Pdb's "up" command now works for generator frames in post-mortem

debugging.

- Issue #4092: Return ArgInfo as promised in the documentation from

inspect.getargvalues.

- Issue #3935: Properly support list subclasses in bisect's C implementation.

- Issue #4014: Don't claim that Python has an Alpha release status, in addition

to claiming it is Mature.

Build

-----

- Issue #4389: Add icon to the uninstall entry in "add-and-remove-programs".

- Issue #4289: Remove Cancel button from AdvancedDlg.

- Issue #1656675: Register a drop handler for .py* files on Windows.

- Issue #4120: Exclude manifest from extension modules in VS2008.

- Issue #4091: Install pythonxy.dll in system32 again.

- Issue #4018: Disable "for me" installations on Vista.

- Issue #3758: Add ``patchcheck`` build target to .PHONY.

- Issue #4204: Fixed module build errors on FreeBSD 4.

C-API

-----

- Issue #4122: On Windows, fix a compilation error when using the

Py_UNICODE_ISSPACE macro in an extension module.

Extension Modules

-----------------

- Issue #4365: Add crtassem.h constants to the msvcrt module.

- Issue #4396: The parser module now correctly validates the with statement.

What's New in Python 2.6 final

==============================

*Release date: 01-Oct-2008*

Core and Builtins

-----------------

- Issue #3967: Fixed a crash in the count() and find() methods of string-like

objects, when the "start" parameter is a huge value.

- Issue #3965: Fixed a crash on Windows when open() is given an invalid

filename or mode, and the filename is a unicode string.

- Bug #3951: Py_USING_MEMORY_DEBUGGER should not be enabled by default.

Library

-------

- Issue #3965: Allow repeated calls to turtle.Screen, by making it a

true singleton object.

- Issue #3895: It was possible to crash the interpreter when an external timer

was used with cProfile that returned an object that could not be converted

into a float.

- Issue #3950: Made turtle respect scale factors.

- Issue #3547: Fixed ctypes structures bitfields of varying integer

sizes.

- Issue #3879: A regression in urllib.getproxies_enviroment was fixed.

- Issue #3863: Disabled a unit test of fork being called from a thread

when running on platforms known to exhibit OS bugs when attempting that.

Build

-----

- Bug #3989: Package the 2to3 script (as 2to3.py) in the Windows

installer.

- Bug #3887: Package x64 version of CRT for AMD64 Windows binaries.

What's New in Python 2.6 release candidate 2?

=============================================

*Release date: 17-Sep-2008*

Core and Builtins

-----------------

Extension Modules

-----------------

- Security Issue #2: imageop did not validate arguments correctly and could

segfault as a result.

- Issue #3886: Possible integer overflows in the _hashopenssl module were

closed.

Tools/Demos

-----------

- Issue #3850: recursion tests in Misc/find_recursion_limit.py can raise

AttributeError instead of RuntimeError, depending in which C API call

exactly the recursion limit is exceeded. Consequently, both exception types

are caught and silenced.

Build

-----

- Issue #3617: Include a licensing statement regarding the Microsoft

C runtime in the Windows installer.

What's New in Python 2.6 release candidate 1?

=============================================

*Release date: 12-Sep-2008*

Core and Builtins

-----------------

- Issue #3642: Suppress warning in obmalloc when size_t is larger than uint.

- Issue #3743: In a few places, PY_FORMAT_SIZE_T was incorrectly used with

PyString_FromFormat or PyErr_Format to display size_t values. The macro

PY_FORMAT_SIZE_T is designed to select the correct format for the OS

``printf`` function, whereas PyString_FromFormat has an independent

implementation and uses "%zd" on all platforms for size_t values.

This makes a difference on win64, where ``printf`` needs "%Id" to display

64bit values.

- Issue #3634: _weakref.ref(Exception).__init__() gave invalid return value on

error.

- Issue #3777: long() applied to a float object now always return a long

object; previously an int would be returned for small values. the __long__

method is allowed to return either an int or a long, but the behaviour of

float objects should not change to respect backward compatibility.

- Issue #3751: str.rpartition would perform a left-partition when called with

a unicode argument.

- Issue #3683: Fix compilation when --without-threads is given.

- Issue #3668: Fix a memory leak with the "s*" argument parser in

PyArg_ParseTuple and friends, which occurred when the argument for "s*"

was correctly parsed but parsing of subsequent arguments failed.

- Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to

match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__

mechanism. In the process, fix a bug where isinstance() and issubclass(),

when given a tuple of classes as second argument, were looking up

__instancecheck__ / __subclasscheck__ on the tuple rather than on each

type object.

- Fix crashes on memory allocation failure found with failmalloc.

- Fix memory leaks found with valgrind and update suppressions file.

- Fix compiler warnings in opt mode which would lead to invalid memory reads.

- Fix problem using wrong name in decimal module reported by pychecker.

- Silenced another compiler warning about a used but not defined

function 'stringlib_contains_obj'.

- Added warnings on the use of ``__getslice__``, ``__setslice__``, or

``__delslice__``.

- Issue #3678: Correctly pass LDFLAGS and LDLAST to the linker on shared

library targets in the Makefile.

- Issue #1204: The configure script now tests for additional libraries

that may be required when linking against readline. This fixes issues

with x86_64 builds on some platforms (a few Linux flavors and OpenBSD).

C-API

-----

- Aliased PyObject_Bytes to PyObject_Str.

Library

-------

- Issue #3640: Pickling a list or a dict uses less local variables, to reduce

stack usage in the case of deeply nested objects.

- Issue #3629: Fix sre "bytecode" validator for an end case.

- Issue #3811: The Unicode database was updated to 5.1.

- Issue #3781: Further warnings.catch_warnings() cleanup to prevent

silent misbehaviour when a single instance is nested in multiple

with statements, or when the methods are invoked in the wrong order.

- Issue #3809: Fixed spurious 'test.blah' file left behind by test_logging.

- Issue #3781: Clean up the API for warnings.catch_warnings() by having it

return a list or None rather than a custom object.

- Issue #1638033: Cookie.Morsel gained the httponly attribute.

- Issue #3535: zipfile couldn't read some zip files larger than 2GB.

- Issue #3776: Deprecate the bsddb package for removal in 3.0.

- Issue #3762: platform.architecture() fails if python is lanched via

its symbolic link.

- Issue #3772: Fixed regression problem in StreamHandler.emit().

- Issue 600362: Relocated parse_qs() and parse_qsl(), from the cgi module

to the urlparse one. Added a PendingDeprecationWarning in the old

module, it will be deprecated in the future.

- Issue #2562: Fix distutils PKG-INFO writing logic to allow having

non-ascii characters and Unicode in setup.py meta-data.

- Issue #3726: Allow spaces in separators in logging configuration files.

- Issue #3719: platform.architecture() fails if there are spaces in the

path to the Python binary.

- Issue 3602: Moved test.test_support.catch_warning() to

warnings.catch_warnings() along with some API cleanup. Expanding the tests

for catch_warnings() also led to an improvement in the raising of a

DeprecationWarning related to warnings.warn_explicit().

- The deprecation warnings for the old camelCase threading API were removed.

- logging: fixed lack of use of encoding attribute specified on a stream.

- Silenced a trivial compiler warning in the sqlite module.

- Fixed two format strings in the _collections module.

- Issue #3703: _fileio.FileIO gave unhelpful error message when trying to open a

directory.

- Issue #3708: os.urandom no longer goes into an infinite loop when passed a

non-integer floating point number.

- Issue #3110: multiprocessing fails to compiel on solaris 10 due to missing

SEM_VALUE_MAX.

Extension Modules

-----------------

- Issue #2975: When compiling several extension modules with Visual Studio 2008

from the same python interpreter, some environment variables would grow

without limit.

- Issue #3643: Added a few more checks to _testcapi to prevent segfaults by

exploitation of poor argument checking.

- sqlite3: Changed docstring of iterdump() to mark method as "Non-standard".

- Issue #3103: Reduced globals symbols used by sqlite3 module and made sure all

remaining ones have "pysqlite_" prefix.

- Issue #3846: Release the GIL during sqlite3_prepare calls. This improves

concurrent access to the same SQLite database from multiple

threads/processes.

Tests

-----

- Issue #3781: Add test.test_support.check_warnings() as a convenience

wrapper for warnings.catch_warnings() that makes it easier to check

that expected warning messages are being reported.

- Issue #3796: Some tests functions were not enabled in test_float.

- Issue #3768: Move test_py3kwarn over to the new API for catch_warnings().

Build

-----

- Issue #3833: Use a different upgrade code for Win64 installers.

- Issue #2271: Set SecureCustomProperties so that installation will properly

use the TARGETDIR even for unprivileged users.

- Allow passing the MSI file name to merge.py.

- Issue #3758: Rename the 'check' target to 'patchcheck' so as to not clash

with GNU build target guidelines.

What's New in Python 2.6 beta 3?

================================

*Release date: 20-Aug-2008*

Core and Builtins

-----------------

- Issue #1878: Remove Py_TPFLAGS_HAVE_VERSION_TAG from

Py_TPFLAGS_DEFAULT when not building the core. This means 3rd party

extensions do not automatically benefit from the class attribute

cache; they will have to explicitly add Py_TPFLAGS_HAVE_VERSION_TAG

to their tp_flags field if they care. This is a backwards

compatibility feature; in 3.0, all types will use the cache by

default.

- Keyword arguments can now follow starred arguments. (``f(a, *args,

keyword=23)`` is now valid syntax.)

- ctypes function pointers that are COM methods have a boolean True

value again.

- Issue #3139: Make buffer-interface thread-safe wrt. PyArg_ParseTuple,

by denying s# to parse objects that have a releasebuffer procedure,

and introducing s*.

- Issue #3537: Fix an assertion failure when an empty but presized dict

object was stored in the freelist.

- Issue #1481296: Make long(float('nan')) and int(float('nan')) raise

ValueError consistently across platforms.

- Issue #3479: On platforms where sizeof(int) is smaller than sizeof(long)

(64bit Unix, for example), unichr() would truncate its argument and return

u'\x00' for unichr(2**32). Now it properly raises an OverflowError.

- Apply security patches from Apple.

- Issue #2542: Now that issubclass() may call arbitrary code, ensure that

PyErr_ExceptionMatches returns 0 when an exception occurs there.

- Issue #1819: function calls with several named parameters are now on

average 35% faster (as measured by pybench).

- Issue #2378: An unexpected UnboundLocalError or NameError could appear when

the python debugger steps into a class statement: the free variables (local

variables defined in an outer scope) would be deleted from the outer scope.

- Issue #2620: Overflow checking when allocating or reallocating memory

was not always being done properly in some python types and extension

modules. PyMem_MALLOC, PyMem_REALLOC, PyMem_NEW and PyMem_RESIZE have

all been updated to perform better checks and places in the code that

would previously leak memory on the error path when such an allocation

failed have been fixed.

Library

-------

- Issue #3612: Added some missing basic types in ctypes.wintypes.

- The methods ``is_in_tuple()``, ``is_vararg()``, and ``is_keywordarg()`` of

symtable.Symbol have been deprecated for removal in 3.0 and the next release.

- Issue #2234: distutils failed for some versions of the cygwin compiler. The

version reported by these tools does not necessarily follow the python

version numbering scheme, so the module is less strict when parsing it.

- Issue #2235: Added Py3k warnings for types which will become unhashable

under the stricter __hash__ inheritance rules in 3.0. Several types

which did not meet the rules for hash invariants and were already

unhashable in 3.0 have now been explicitly flagged as unhashable in

2.6 as well (collections.Mapping, collections.Set, unittest.TestSuite,

xml.dom.minidom.NamedNodeMap, numbers.Number, UserList.UserList)

- Update __all__ for cookielib, csv, os, urllib2, and weakref to include things

imported into the module but exposed as part of the module's API.

- Remove an unneeded import of abc.ABCMeta from 'inspect'.

- Remove unneeded imports of 'sys' and 'warnings' from 'io'.

- Remove unneeded imports of 'warnings' from shelve, filecmp, and dummy_thread.

- Issue #3575: Incremental decoder's decode function now takes bytearray

by using 's*' instead of 't#'.

- Issue #2222: Fixed reference leak when occured os.rename()

fails unicode conversion on 2nd parameter. (windows only)

- Issue 2464. urllib2 now supports a malformation in the URL received

in a redirect.

- Silence the DeprecationWarning raised when importing mimetools in

BaseHTTPServer, cgi (and rfc822), httplib.

- Issue #2776: fixed small issue when handling an URL with double slash

after a 302 response in the case of not going through a proxy.

- Issue #2676: in the email package, content-type parsing was hanging on

pathological input because of quadratic or exponential behaviour of a

regular expression.

- Issue #3476: binary buffered reading through the new "io" library is now

thread-safe.

- Silence the DeprecationWarning of rfc822 when it is imported by mimetools

since mimetools itself is deprecated. Because modules are cached, all

subsequent imports of rfc822 will not raise a visible DeprecationWarning.

- Issue #3134: shutil referenced undefined WindowsError symbol.

- Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to

menu entries were not deleted.

- Copied the implementation of reduce() to _functools.reduce() to have a

version that did not raise a DeprecationWarning under -3.

- Issue #3205: When iterating over a BZ2File fails allocating memory, raise

a MemoryError rather than silently stop the iteration.

- Issue #3487: sre "bytecode" validator. Passing invalid "re-bytecode"

to _sre.compile() will now be rejected. This should not affect anybody

since the re.compile() function never generates invalid re-bytecode.

- Issue #3436: Make csv.DictReader's fieldnames attribute a property so that

upon first access it can be automatically initialized from the csv file if

it wasn't initialized during instantiation.

- Issue #2338: Create imp.reload() to help with transitioning to Python 3.0 as

the reload() built-in has been removed.

- Changed code in the following modules/packages to remove warnings raised

while running under the ``-3`` flag: aifc, asynchat, asyncore, bdb, bsddb,

ConfigParser, cookielib, csv, difflib, distutils, DocXMLRPCServer, email,

filecmp, fileinput, inspect, logging, modulefinder, pdb, pickle, profile,

pstats, pydoc, re, rlcompleter, SimpleXMLRPCServer, shelve, socket,

subprocess, sqlite3, tarfile, Tkinter, test.test_support, textwrap,

threading, tokenize, traceback, urlparse, wsgiref, xml, xmlrpclib.

- Issue #3039: Fix tarfile.TarFileCompat.writestr() which always

raised an AttributeError.

- Issue #2523: Fix quadratic behaviour when read()ing a binary file without

asking for a specific length. This problem only affected files opened

using the new "io" module, not the built-in open() function.

- Issue #3449: Update decimal module to use most recent specification

(v. 1.68) and tests (v. 2.58) from IBM.

- Issue 3437: Bug fix in robotparser parsing of Allow: lines.

- Issue 1592: Improve error reporting when operations are attempted

on a closed shelf.

- Deprecate the "ast" parser function aliases.

- Issue #3120: On 64-bit Windows the subprocess module was truncating handles.

- Issue #3303: Fix a crash in locale.strcoll() when calling it with

invalid arguments.

- Issue #3302: Fix several crashes when calling locale's gettext functions

with None arguments.

- Issue #3389: Allow resolving dotted names for handlers in logging

configuration files.

- Deprecate the sunaudio module for removal in Python 3.0.

- Issue #3394: zipfile.writestr sets external attributes when passed a

file name rather than a ZipInfo instance, so files are extracted with

mode 0600 rather than 000 under Unix.

- Issue #1857: subprocess.Popen.poll gained an additional _deadstate keyword

argument in python 2.5, this broke code that subclassed Popen to include its

own poll method. Fixed my moving _deadstate to an _internal_poll method.

Build

-----

- Generate the PatternGrammar pickle during "make install".

Documentation

-------------

- Issue #2235: the C API function PyObject_HashNotImplemented and its

interaction with the tp_hash slot (added in 2.6b2) are now documented

- Issue #643841: The language reference now provides more detailed

coverage of the lookup process for special methods. The disclaimers

regarding lack of coverage of new-style classes have also been

removed, since the coverage is now fairly reasonable.

What's New in Python 2.6 beta 2?

================================

*Release date: 17-Jul-2008*

Core and Builtins

-----------------

- Issue #3156: Fix inconsistent behavior of the bytearray type: all

its methods now allow for items objects that can be converted to

an integer using operator.index().

- Issue #3360: Fix incorrect parsing of '020000000000.0', which

produced a ValueError instead of giving the correct float.

- Issue #3083: Add alternate (#) formatting for bin, oct, hex output

for str.format(). This adds the prefix 0b, 0o, or 0x, respectively.

- Issue #3008: the float type has a new instance method 'float.hex'

and a new class method 'float.fromhex' to convert floating-point

numbers to and from hexadecimal strings, respectively.

- Issue #2235: __hash__ is once again inherited by default. To allow

collections.Hashable to remain meaningful in the presence of the

default hash implementation (object.__hash__), it is now possible

to explicit block inheritance of hash by setting __hash__=None at

the Python level, or tp_hash=PyObject_HashNotImplemented at the C

level.

- Issue #3221: Issue a RuntimeWarning instead of raising SystemError if

the parent module cannot be found while performing an absolute import.

This means that an incorrectly defined __package__ attribute will

now only prevent relative imports in that module rather than causing

all imports from that module to fail.

- Issue #2517: Allow unicode messages in Exceptions again by correctly

bypassing the instance dictionary when looking up __unicode__ on

new-style classes.

- Issue #3242: Fix a crash inside the print statement, if sys.stdout is

set to a custom object whose write() method happens to install

another file in sys.stdout.

- Issue #3088: Corrected a race condition in classes derived from

threading.local: the first member set by a thread could be saved in

another thread's dictionary.

- Issue #3004: Minor change to slice.indices(): the start and stop

arguments are now treated identically, making the behaviour easier

to describe and understand. For example, slice(None, -10,

1).indices(9) now returns (0, 0, 1) instead of (0, -1, 1), and

slice(None, 10, -1).indices(10) returns (9, 9, -1) instead of (9,

10, -1).

- Issue #3219: Calling a function with repeated keyword arguments,

f(a=2, a=23), would not cause a syntax error. This was a regression

from 2.4 caused by the switch to the new compiler.

- Issue #2862: Make int and float freelist management consistent with

other freelists. Changes their CompactFreeList apis into

ClearFreeList apis and calls them via gc.collect().

Library

-------

- Issue #3554: ctypes.string_at and ctypes.wstring_at did call Python

api functions without holding the GIL, which could lead to a fatal

error when they failed.

- Issue #799428: Fix Tkinter.Misc._nametowidget to unwrap Tcl command objects.

- Issue #3395: fix reference in test_multiprocessing to old debugInfo method

- Issue #3312: Fix two crashes in sqlite3.

- Issue #1608818: Fix misbehavior in os.listdir() if readdir() fails.

- Issue #3125: Remove copy_reg in multiprocessing and replace it with

ForkingPickler.register() to resolve conflict with ctypes.

- Issue #3090: Fixed ARCHFLAGS parsing on OS/X

- Issue #3313: Fixed a crash when a failed dlopen() call does not set

a valid dlerror() message.

- Issue #3258: Fixed a crash when a ctypes POINTER type to an

incomplete structure was created.

- Issue #3339: dummy_thread.acquire() should not return None.

- Issue #3285: Fractions from_float() and from_decimal() accept Integral arguments.

- Issue #3301: Bisect module behaved badly when lo was negative.

- Issue #839496: SimpleHTTPServer used to open text files in text mode. This is

both unnecessary (HTTP allows text content to be sent in several forms) and

wrong because the actual transmitted size could differ from the

content-length. The problem had been corrected in the 2.4 branch, but never

merged into trunk.

- Issue #2663: add filtering capability to shutil.copytree().

- Issue #1622: Correct interpretation of various ZIP header fields.

- Issue #1526: Allow more than 64k files to be added to Zip64 file.

- Issue #1746: Correct handling of zipfile archive comments (previously

archives with comments over 4k were flagged as invalid). Allow writing

Zip files with archives by setting the 'comment' attribute of a ZipFile.

- Issue #449227: The rlcompleter module now adds "(" to callable objects

when completed.

- Issue #3190: Pydoc now hides the automatic module attribute __package__ (the

handling is now the same as that of other special attributes like __name__).

- Issue #2885 (partial): The urllib.urlopen() function has been deprecated for

removal in Python 3.0 in favor of urllib2.urlopen().

- Issue #2113: Fix error in subprocess.Popen if the select system call is

interrupted by a signal.

- Issue #3309: Fix bz2.BZFile iterator to release its internal lock

properly when raising an exception due to the bz2file being closed.

Prevents a deadlock.

- Issue #3094: httplib.HTTPSConnection Host: headers no longer include the

redundant ":443" port number designation when the connection is using the

default https port (443).

- Issue #874900: after an os.fork() call the threading module state is cleaned

up in the child process to prevent deadlock and report proper thread counts

if the new process uses the threading module.

Tests

-----

- test.test_support.catch_warning now keeps track of all warnings it sees

and is now better documented. Explicit unit tests for this context manager

have been added to test_warnings.

Build

-----

- Issue #3215: Build sqlite3 as sqlite3.dll, not sqlite3.pyd.

Documentation

-------------

- Document that robotparser has been renamed to urllib.robotparser in

Python 3.0.

- Document that urlparse has been renamed to urllib.parse in Python 3.0.

- Document that urllib2 is split across multiple modules and renamed in

Python 3.0.

- Document that urllib is split across multiple modules and renamed in

Python 3.0.

What's New in Python 2.6 beta 1?

================================

*Release date: 18-June-2008*

Core and Builtins

-----------------

- Issue #3211: warnings.warn_explicit() did not guard against its 'registry'

argument being anything other than a dict or None. Also fixed a bug in error

handling when 'message' and 'category' were both set to None, triggering a

bus error.

- Issue #3100: Corrected a crash on deallocation of a subclassed weakref which

holds the last (strong) reference to its referent.

- Add future_builtins.ascii().

- Several set methods now accept multiple arguments: update(), union(),

intersection(), intersection_update(), difference(), and difference_update().

- Issue #2898: Added sys.getsizeof() to retrieve size of objects in bytes.

- New environment variable PYTHONIOENCODING.

- Patch #2488: Add sys.maxsize.

- Issue #2353: file.xreadlines() now emits a Py3k warning.

- Issue #2863: generators now have a ``gen.__name__`` attribute that

equals ``gen.gi_code.co_name``, like ``func.__name___`` that equals

``func.func_code.co_name``. The repr() of a generator now also

contains this name.

- Issue #2831: enumerate() now has a ``start`` argument.

- Issue #2801: fix bug in the float.is_integer method where a

ValueError was sometimes incorrectly raised.

- Issue #2790: sys.flags was not properly exposing its bytes_warning

attribute.

- Issue #2196: hasattr() now lets exceptions which do not inherit

Exception (KeyboardInterrupt, and SystemExit) propagate instead of

ignoring them.

- Added checks for integer overflows, contributed by Google. Some are

only available if asserts are left in the code, in cases where they

can't be triggered from Python code.

Extension Modules

-----------------

- Issue #1179: [CVE-2007-4965] Integer overflow in imageop module.

- Issue #3116: marshal.dumps() had quadratic behavior for strings > 32Mb.

- Issue #2138: Add factorial() to the math module.

- The heapq module does comparisons using LT instead of LE. This

makes its implementation match that used by list.sort().

- Issue #2819: add full-precision summation function to math module,

based on Hettinger's ASPN Python Cookbook recipe.

- Issue #2592: delegate nb_index and the floor/truediv slots in

weakref.proxy.

- Support os.O_ASYNC and fcntl.FASYNC if the constants exist on the

platform.

- Support for Windows 9x has been removed from the winsound module.

- bsddb module updated to version 4.7.3.

http://www.jcea.es/programacion/pybsddb.htm#bsddb3-4.7.3. This

code should be compatible with Python 3.0.

- Issue #2858: Fix potential memory corruption when

bsddb.db.DBEnv.lock_get and other bsddb.db object constructors

raised an exception.

- Issue #2669: bsddb/__init__.py iteration no longer silently fails when

the database has changed size during iteration. It now raises a

RuntimeError in the same manner as a dictionary.

- Issue #2870: cmathmodule.c compile error.

- Added a threading.Thread.ident property.

Library

-------

- logging.config: Removed out-of-date comment in _install_handlers and

used issubclass in place of equality comparison of classes.

- Issue #2722: Now the os.getcwd() supports very long path names.

- Issue #2888: Fixed the behaviour of pprint when working with nested

structures, to match the behaviour of 2.5 and 3.0 (now follows the common

sense).

- Issue #1817: cgi now correctly handles the querystring on POST requests

- Issue #3136: fileConfig()'s disabling of old loggers is now conditional via

an optional disable_existing_loggers parameter, but the default value is

such that the old behaviour is preserved. Thanks to Leandro Lucarella for

the patch.

- Issue #3126: StreamHandler and FileHandler check before calling "flush" and

"close" that the stream object has these, using hasattr (thanks to bobf for

the patch).

- Issue #2912: platform.uname now tries to determine unknown information even if

os.uname exists.

- The rfc822 module has been deprecated for removal in 3.0.

- The mimetools module has been deprecated for removal in 3.0.

- The ctypes.byref function now takes an optional second parameter

which allows to specify an offset in bytes for the constructed

pointer-like object.

- Added the ast module.

- Added the multiprocessing module, PEP 371.

- Factored out the indentation cleaning from inspect.getdoc() into

inspect.cleandoc() to ease standalone use.

- Issue #1798: Add ctypes calling convention that allows safe access

to errno.

- Issue #2404: ctypes objects support the new pep3118 buffer interface.

- Patch #2125: Add GetInteger and GetString methods for

msilib.Record objects.

- Issue #2782: The datetime module's strftime methods now accept

unicode format strings just as time.strftime always has.

- The sgmllib and htmllib modules have been deprecated for removal

in Python 3.0.

- Issue #3011: locale module alias table was updated to the latest

version from the X.org locale.alias file.

- Issue #1797 (partial fix): ctypes NULL function pointers have a

False boolean value now.

- Issue #2985: Allow 64-bit integer responses (``<i8>``) in XMLRPC

transfers.

- Issue #2877: The UserString.MutableString class has been removed in

Python 3.0.

- Do not close external file objects passed to tarfile.open(mode='w:bz2')

when the TarFile is closed.

- Issue #2959: For consistency with other file-like objects, gzip's

GzipFile.close() can now be called multiple times without raising

an exception.

- Issue #1390: Raise ValueError in toxml when an invalid comment would

otherwise be produced.

- Issue #2914: TimedRotatingFileHandler now takes an optional keyword

argument "utc" to use UTC time rather than local time.

- Issue #2929: TimedRotatingFileHandler was using the wrong path when

deleting old log files (filename only instead of full path).

- Issue #1775025: You can now specify zipfile members to open(),

read() or extract() via a ZipInfo instance. This allows handling

duplicate filenames in zipfiles.

- Issue #961805: Fix Text.edit_modified() in Tkinter.

- Issue #1793: Function ctypes.util.find_msvcrt() added that returns

the name of the C runtime library that Python uses.

ctypes.util.find_library(name) now call this function when name is

'm' or 'c'.

- The statvfs module has been deprecated for removal in Python 3.0.

- The sunaudiodev and SUNAUDIODEV modules have been deprecated for

removal in Python 3.0.

- The WAIT module from IRIX has been deprecated for removal in Python

3.0.

- The torgb module from IRIX has been deprecated for removal in Python

3.0.

- The SV module from IRIX has been deprecated for removal in Python

3.0.

- The readcd module from IRIX has been deprecated for removal in

Python 3.0.

- The panelparser module from IRIX has been deprecated for removal in

Python 3.0.

- The panel module from IRIX has been deprecated for removal in Python

3.0.

- The jpeg module from IRIX has been deprecated for removal in Python

3.0.

- The IOCTL module from IRIX has been deprecated for removal in Python

3.0.

- The IN module from IRIX has been deprecated for removal in Python

3.0.

- The imgfile module from IRIX has been deprecated for removal in

Python 3.0.

- The GLWS module from IRIX has been deprecated for removal in Python

3.0.

- The GET module from IRIX has been deprecated for removal in Python

3.0.

- The fm module from IRIX has been deprecated for removal in Python

3.0.

- The FL, flp, and fl modules from IRIX have been deprecated for

removal in Python 3.0.

- The FILE module on IRIX has been deprecated for removal in Python

3.0.

- The ERRNO module on IRIX has been deprecated for removal in Python

3.0.

- The DEVICE, GL, gl, and cgen modules (which indirectly includes

cgensupport) have been deprecated for removal in Python 3.0.

- The CL, CL_old, and cl modules for IRIX have been deprecated for

removal in Python 3.0.

- The cdplayer module for IRIX has been deprecated for removal in

Python 3.0.

- The cddb module for IRIX has been deprecated for removal in Python

3.0.

- The cd and CD modules for IRIX have been deprecated for removal in

Python 3.0.

- The al and AL modules for IRIX have been deprecated for removal in

Python 3.0.

- Issue #1713041: fix pprint's handling of maximum depth.

- The timing module has been deprecated for removal in Python 3.0.

- The sv module has been deprecated for removal in Python 3.0.

- The multifile module has been deprecated as per PEP 4.

- The imageop module has been deprecated for removal in Python 3.0.

- Issue #2250: Exceptions raised during evaluation of names in

rlcompleter's ``Completer.complete()`` method are now caught and

ignored.

- Issue #2659: Added ``break_on_hyphens`` option to textwrap

TextWrapper class.

- The mhlib module has been deprecated for removal in Python 3.0.

- The linuxaudiodev module has been deprecated for removal in Python

3.0.

- The ihooks module has been deprecated for removal in Python 3.0.

- The fpformat module has been deprecated for removal in Python 3.0.