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Python News
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(editors: check NEWS.help for information about editing NEWS using ReST.)
What's New in Python 2.7 alpha 1
================================
*Release date: XX-XXX-20XX*
Core and Builtins
-----------------
- Issue #4258: Make it possible to use base 2**30 instead of base
2**15 for the internal representation of integers, for performance
reasons. Base 2**30 is enabled by default on 64-bit machines. Add
--enable-big-digits option to configure, which overrides the
default. Add sys.long_info structseq to provide information about
the internal format.
- Issue #4034: Fix weird attribute error messages of the traceback object. (As a
result traceback.__members__ no longer exists.)
- Issue #4474: PyUnicode_FromWideChar now converts characters outside
the BMP to surrogate pairs, on systems with sizeof(wchar_t) == 4
and sizeof(Py_UNICODE) == 2.
- Issue #5237: Allow auto-numbered fields in str.format(). For
example: '{} {}'.format(1, 2) == '1 2'.
- Issue #3652: Make the 'line' argument for warnings.showwarning() a
requirement. Means the DeprecationWarning from Python 2.6 can go away.
- Issue #5247: Improve error message when unknown format codes are
used when using str.format() with str, unicode, long, int, and
float arguments.
- Running Python with the -3 option now also warns about classic division
for ints and longs.
- Issue #5260: Long integers now consume less memory: average
saving is 2 bytes per long on a 32-bit system and 6 bytes per long
on a 64-bit system.
- Issue #5186: Reduce hash collisions for objects with no __hash__ method by
rotating the object pointer by 4 bits to the right.
- Issue #4575: Fix Py_IS_INFINITY macro to work correctly on x87 FPUs:
it now forces its argument to double before testing for infinity.
- Issue #4978: Passing keyword arguments as unicode strings is now allowed.
- Issue 1242657: the __len__() and __length_hint__() calls in several tools
were suppressing all exceptions. These include list(), filter(), map(),
zip(), and bytearray().
- os.ftruncate raises OSErrors instead of IOErrors for consistency with other os
functions.
- Issue #4991: Passing invalid file descriptors to io.FileIO now raises an
OSError.
- Issue #4807: Port the _winreg module to Windows CE.
- Issue #4935: The overflow checking code in the expandtabs() method common
to str, bytes and bytearray could be optimized away by the compiler, letting
the interpreter segfault instead of raising an error.
- Issue #3720: Fix a crash when an iterator modifies its class and removes its
__next__ method.
- Issue #4893: Use NT threading on CE.
- Issue #4915: Port sysmodule to Windows CE.
- Issue #4074: Change the criteria for doing a full garbage collection (i.e.
collecting the oldest generation) so that allocating lots of objects without
destroying them does not show quadratic performance. Based on a proposal by
Martin von Löwis at
http://mail.python.org/pipermail/python-dev/2008-June/080579.html.
- Issue #4850: Change COUNT_ALLOCS variables to Py_ssize_t.
- Issue #1180193: When importing a module from a .pyc (or .pyo) file with
an existing .py counterpart, override the co_filename attributes of all
code objects if the original filename is obsolete (which can happen if the
file has been renamed, moved, or if it is accessed through different paths).
Patch by Ziga Seilnacht and Jean-Paul Calderone.
- Issue #4075: Use OutputDebugStringW in Py_FatalError.
- Issue #4797: IOError.filename was not set when _fileio.FileIO failed to open
file with `str' filename on Windows.
- Issue #3680: Reference cycles created through a dict, set or deque iterator
did not get collected.
- Issue #4701: PyObject_Hash now implicitly calls PyType_Ready on types
where the tp_hash and tp_dict slots are both NULL.
- Issue #4764: With io.open, IOError.filename is set when trying to open a
directory on POSIX systems.
- Issue #4764: IOError.filename is set when trying to open a directory on POSIX
systems.
- Issue #4759: None is now allowed as the first argument of
bytearray.translate(). It was always allowed for bytes.translate().
- Added test case to ensure attempts to read from a file opened for writing
fail.
- Issue #2467: gc.DEBUG_STATS reported invalid elapsed times. Also, always
print elapsed times, not only when some objects are uncollectable /
unreachable. Original patch by Neil Schemenauer.
- Issue #3439: Add a bit_length method to int and long.
- Issue #2183: Simplify and optimize bytecode for list comprehensions.
Original patch by Neal Norwitz.
- Issue #4597: Fixed exception handling when the __exit__ function of a
context manager returns a value that cannot be converted to a bool.
- Issue #4597: Fixed several opcodes that weren't always propagating
exceptions.
- Issue #4445: Replace "sizeof(PyStringObject)" with
"offsetof(PyStringObject, ob_sval) + 1" when allocating memory for
str instances. On a typical machine this saves 3 bytes of memory
(on average) per string allocation.
- 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 #3689: The list reversed iterator now supports __length_hint__
instead of __len__. Behavior now matches other reversed iterators.
- Issue #4367: Python would segfault during compiling when the unicodedata
module couldn't be imported and \N escapes were present.
- Issue #4233: Changed semantic of ``_fileio.FileIO``'s ``close()``
method on file objects with closefd=False. The file descriptor is still
kept open but the file object behaves like a closed file. The ``FileIO``
object also got a new readonly attribute ``closefd``.
- 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.
- Using ``nonlocal`` as a variable name will now raise a Py3k SyntaxWarning
because it is a reserved word in 3.x.
- 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.
- Issue #4509: Various issues surrounding resize of bytearray objects to
which there are buffer exports.
- Issue #4748: Lambda generators no longer return a value.
- Issue #3582: Use native TLS functions on Windows
- The re.sub(), re.subn() and re.split() functions now accept a flags parameter.
Library
-------
- Issue #5381: Added object_pairs_hook to the json module. This allows
OrderedDicts to be built by the decoder.
- Issue #2110: Add support for thousands separator and 'n' type
specifier to Decimal.__format__
- Fix Decimal.__format__ bug that swapped the meanings of the '<' and
'>' alignment characters.
- Issue #1222: locale.format() bug when the thousands separator is a space
character.
- Issue #5472: Fixed distutils.test_util tear down. Original patch by
Tim Golden.
- collections.deque() objects now have a read-only attribute called maxlen.
- Issue #2638: Show a window constructed with tkSimpleDialog.Dialog only after
it is has been populated and properly configured in order to prevent
window flashing.
- Issue #4792: Prevent a segfault in _tkinter by using the
guaranteed to be safe interp argument given to the PythonCmd in place of
the Tcl interpreter taken from a PythonCmd_ClientData.
- Issue #5193: Guarantee that Tkinter.Text.search returns a string.
- Issue #5394: removed > 2.3 syntax from distutils.msvc9compiler.
Original patch by Akira Kitada.
- Issue #5385: Fixed mmap crash after resize failure on windows.
- Issue #5179: Fixed subprocess handle leak on failure on windows.
- PEP 372: Added collections.OrderedDict().
- The _asdict() for method for namedtuples now returns an OrderedDict().
- The configparser module now defaults to using an ordered dictionary.
- Issue #4308: httplib.IncompleteRead's repr doesn't include all of the data all
ready received.
- Issue #5401: Fixed a performance problem in mimetypes when ``from mimetypes
import guess_extension`` was used.
- Issue #1733986: Fixed mmap crash in accessing elements of second map object
with same tagname but larger size than first map. (Windows)
- Issue #5386: mmap.write_byte didn't check map size, so it could cause buffer
overrun.
- Issue #1533164: Installed but not listed *.pyo was breaking Distutils
bdist_rpm command.
- Issue #5378: added --quiet option to Distutils bdist_rpm command.
- Issue #5052: make Distutils compatible with 2.3 again.
- Deprecated methods of symtable.Symbol have been removed: is_keywordarg(),
is_vararg(), and is_in_tuple().
- Issue #5316: Fixed buildbot failures introduced by multiple inheritance
in Distutils tests.
- Issue #5287: Add exception handling around findCaller() call to help out
IronPython.
- Issue #5282: Fixed mmap resize on 32bit windows and unix. When offset > 0,
The file was resized to wrong size.
- Issue #5292: Fixed mmap crash on its boundary access m[len(m)].
- Issue #2279: distutils.sdist.add_defaults now add files
from the package_data and the data_files metadata.
- Issue #5257: refactored all tests in distutils, so they use
support.TempdirManager, to avoid writing in the tests directory.
- Issue #4524: distutils build_script command failed with --with-suffix=3.
Initial patch by Amaury Forgeot d'Arc.
- Issue #2461: added tests for distutils.util
- Issue #1008086: Fixed socket.inet_aton() to always return 4 bytes even on
LP64 platforms (most 64-bit Linux, bsd, unix systems).
- Issue #5203: Fixed ctypes segfaults when passing a unicode string to a
function without argtypes (only occurs if HAVE_USABLE_WCHAR_T is false).
- Issue #3386: distutils.sysconfig.get_python_lib prefix argument was ignored
under NT and OS2. Patch by Philip Jenvey.
- Issue #5128: Make compileall properly inspect bytecode to determine if needs
to be recreated. This avoids a timing hole thanks to the old reliance on the
ctime of the files involved.
- Issue #5122: Synchronize tk load failure check to prevent a potential
deadlock.
- Issue #1818: collections.namedtuple() now supports a keyword argument
'rename' which lets invalid fieldnames be automatically converted to
positional names in the form, _1, _2, ...
- Issue #4890: Handle empty text search pattern in Tkinter.Text.search.
- Issue #5170: Fixed Unicode output bug in logging and added test case.
This is a regression which did not occur in 2.5.
- Issue #4512 (part 2): Promote ``ZipImporter._get_filename()`` to be a
public documented method ``ZipImporter.get_filename()``.
- Issue #4195: The ``runpy`` module (and the ``-m`` switch) now support
the execution of packages by looking for and executing a ``__main__``
submodule when a package name is supplied. Initial patch by Andi
Vajda.
- Issue #1731706: Call Tcl_ConditionFinalize for Tcl_Conditions that will
not be used again (this requires Tcl/Tk 8.3.1), also fix a memory leak in
Tkapp_Call when calling from a thread different than the one that created
the Tcl interpreter. Patch by Robert Hancock.
- Issue #1520877: Now distutils.sysconfig reads $AR from the
environment/Makefile. Patch by Douglas Greiman.
- Issue #4285: Change sys.version_info to be a named tuple. Patch by
Ross Light.
- Issue #1276768: The verbose option was not used in the code of
distutils.file_util and distutils.dir_util.
- Issue #5132: Fixed trouble building extensions under Solaris with
--enabled-shared activated. Initial patch by Dave Peterson.
- Issue #1581476: Always use the Tcl global namespace when calling into Tcl.
- Issue #2047: shutil.move() could believe that its destination path was
inside its source path if it began with the same letters (e.g. "src" vs.
"src.new").
- Issue 4920: Fixed .next() vs .__next__() issues in the ABCs for
Iterator and MutableSet.
- Added the ttk module. See issue #2983: Ttk support for Tkinter.
- Issue 5021: doctest.testfile() did not create __name__ and
collections.namedtuple() relied on __name__ being defined.
- Backport importlib from Python 3.1. Only the import_module() function has
been backported to help facilitate transitions from 2.7 to 3.1.
- Issue #1885: distutils. When running sdist with --formats=tar,gztar
the tar file was overriden by the gztar one.
- Issue #4863: distutils.mwerkscompiler has been removed.
- Added a new itertools functions: combinations_with_replacement()
and compress().
- Issue 5032: added a step argument to itertools.count() and
allowed non-integer arguments.
- Fix and properly document the multiprocessing module's logging
support, expose the internal levels and provide proper usage
examples.
- Issue #1672332: fix unpickling of subnormal floats, which was
producing a ValueError on some platforms.
- Issue #3881: Help Tcl to load even when started through the
unreadable local symlink to "Program Files" on Vista.
- Issue #4710: Extract directories properly in the zipfile module;
allow adding directories to a zipfile.
- Issue #3807: _multiprocessing build fails when configure is passed
--without-threads argument. When this occurs, _multiprocessing will
be disabled, and not compiled.
- Issue #5008: When a file is opened in append mode with the new IO library,
do an explicit seek to the end of file (so that e.g. tell() returns the
file size rather than 0). This is consistent with the behaviour of the
traditional 2.x file object.
- Issue #5013: Fixed a bug in FileHandler which occurred when the delay
parameter was set.
- Issue #4998: The memory saving effect of __slots__ had been lost on Fractions
which inherited from numbers.py which did not have __slots__ defined. The
numbers hierarchy now has its own __slots__ declarations.
- Issue #3321: _multiprocessing.Connection() doesn't check handle; added checks
for *nix machines for negative handles and large int handles. Without this check
it is possible to segfault the interpreter.
- Issue #4449: AssertionError in mp_benchmarks.py, caused by an underlying issue
in sharedctypes.py.
- Issue #1225107: inspect.isclass() returned True for instances with a custom
__getattr__.
- Issue #3997: zipfiles generated with more than 65536 files could not be
opened with other applications.
- Issue #1162154: inspect.getmembers() now skips attributes that raise
AttributeError, e.g. a __slots__ attribute which has not been set.
- Issue #1696199: Add collections.Counter() for rapid and convenient
counting.
- Issue #3860: GzipFile and BZ2File now support the context manager protocol.
- Issue #4272: Add an optional argument to the GzipFile constructor to override
the timestamp in the gzip stream. The default value remains the current time.
The information can be used by e.g. gunzip when decompressing. Patch by
Jacques Frechet.
- Restore Python 2.3 compatibility for decimal.py.
- Issue #1702551: distutils sdist was not excluding VCS directories under
Windows. Inital solution by Guy Dalberto.
- The _tkinter module functions "createfilehandler", "deletefilehandler",
"createtimerhandler", "mainloop", "dooneevent" and "quit" have been
deprecated for removal in 3.x
- Issue #4796: Added Decimal.from_float() and Context.create_decimal_from_float()
to the decimal module.
- Issue #4812: add missing underscore prefix to some internal-use-only
constants in the decimal module. (Dec_0 becomes _Dec_0, etc.)
- Issue #4795: inspect.isgeneratorfunction() returns False instead of None when
the function is not a generator.
- Issue #4702: Throwing a DistutilsPlatformError instead of IOError in case
no MSVC compiler is found under Windows. Original patch by Philip Jenvey.
- Issue #4646: distutils was choking on empty options arg in the setup
function. Original patch by Thomas Heller.
- Fractions.from_float() no longer loses precision for integers too big to
cast as floats.
- Issue 4790: The nsmallest() and nlargest() functions in the heapq module
did unnecessary work in the common case where no key function was specified.
- Issue #3767: Convert Tk object to string in tkColorChooser.
- Issue #3248: Allow placing ScrolledText in a PanedWindow.
- Issue #4444: Allow assertRaises() to be used as a context handler, so that
the code under test can be written inline if more practical.
- Issue #4739: Add pydoc help topics for symbols, so that e.g. help('@')
works as expected in the interactive environment.
- Issue #4756: zipfile.is_zipfile() now supports file-like objects. Patch by
Gabriel Genellina.
- Issue #4400: .pypirc default generated file was broken in distutils.
- Issue #4736: io.BufferedRWPair's closed property now functions properly.
- Issue #3954: Fix a potential SystemError in _hotshot.logreader error
handling.
- Issue #4574: fix a crash in io.IncrementalNewlineDecoder when a carriage
return encodes to more than one byte in the source encoding (e.g. UTF-16)
and gets split on a chunk boundary.
- Issue #4223: inspect.getsource() will now correctly display source code
for packages loaded via zipimport (or any other conformant PEP 302
loader). Original patch by Alexander Belopolsky.
- Issue #4201: pdb can now access and display source code loaded via
zipimport (or any other conformant PEP 302 loader). Original patch by
Alexander Belopolsky.
- Issue #4197: doctests in modules loaded via zipimport (or any other PEP
302 conformant loader) will now work correctly in most cases (they
are still subject to the constraints that exist for all code running
from inside a module loaded via a PEP 302 loader and attempting to
perform IO operations based on __file__). Original patch by
Alexander Belopolsky.
- Issues #4082 and #4512: Add runpy support to zipimport in a manner that
allows backporting to maintenance branches. Original patch by
Alexander Belopolsky.
- Issue #4163: Use unicode-friendly word splitting in the textwrap functions
when given an unicode string.
- Issue #4616: TarFile.utime(): Restore directory times on Windows.
- Issue #4084: Fix max, min, max_mag and min_mag Decimal methods to
give correct results in the case where one argument is a quiet NaN
and the other is a finite number that requires rounding.
- Issue #1030250: Distutils created directories even when run with the
--dry-run option.
- Issue #4483: _dbm module now builds on systems with gdbm & gdbm_compat
libs.
- Issue #4529: fix the parser module's validation of try-except-finally
statements.
- Issue #4458: getopt.gnu_getopt() now recognizes a single "-" as an argument,
not a malformed option.
- Added the subprocess.check_output() convenience function to get output
from a subprocess on success or raise an exception on error.
- Issue #1055234: cgi.parse_header(): Fixed parsing of header parameters to
support unusual filenames (such as those containing semi-colons) in
Content-Disposition headers.
- Issue #4384: Added logging integration with warnings module using
captureWarnings(). This change includes a NullHandler which does nothing;
it will be of use to library developers who want to avoid the "No handlers
could be found for logger XXX" message which can appear if the library user
doesn't configure logging.
- 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.
- FileIO's mode attribute now always includes ``"b"``.
- Issue #4116: Resolve member name conflict in ScrolledCanvas.__init__.
- httplib.HTTPConnection.putheader() now accepts an arbitrary number of values
for any header, matching what the documentation has claimed for a while.
- 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.
- Issue #4730: Fixed the cPickle module to handle correctly astral characters
when protocol 0 is used.
- Issue #1594: MacOS.GetCreatorAndType now always returns a big-endian result,
to be consistent with Apple tools.
- Issue #900949: plat-mac/videoreader.py no longer relies on a non-existing
module.
- Issue #16278952: plat-mac/videoreader.py now correctly imports MediaDescr
- Issue #1737832 : plat-mac/EasyDialog.py no longer uses the broken aepack
module.
- Issue #1149804: macostools.mkdirs now even works when another process
creates one of the needed subdirectories.
- Issue #900506: added --no-zipimport flag to the bundlebuilder script
- Issue #841800: bundlebuilder now works with 'python -O'
- Issue #4861: ctypes.util.find_library(): Robustify. Fix library detection on
biarch systems. Try to rely on ldconfig only, without using objdump and gcc.
- Issue #5104: The socket module now raises OverflowError when 16-bit port and
protocol numbers are supplied outside the allowed 0-65536 range on bind()
and getservbyport().
- Issue #999042: The Python compiler now handles explict global statements
correctly (should be assigned using STORE_GLOBAL opcode).
Tools/Demos
-----------
- Ttk demos added in Demo/tkinter/ttk/
- Issue #4677: add two list comprehension tests to pybench.
Build
-----
- Link the shared python library with $(MODLIBS).
- Issue #5134: Silence compiler warnings when compiling sqlite with VC++.
- Issue #4494: Fix build with Py_NO_ENABLE_SHARED on Windows.
- Issue #4895: Use _strdup on Windows CE.
- Issue #4472: "configure --enable-shared" now works on OSX
- Issues #4728 and #4060: WORDS_BIGEDIAN is now correct in Universal builds.
- 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
-----
- Some PyBytes_* aliases have been removed because they don't exist in 3.x.
- Issue #5175: PyLong_AsUnsignedLongLong now raises OverflowError
for negative arguments. Previously, it raised TypeError.
- Issue #4720: The format for PyArg_ParseTupleAndKeywords can begin with '|'.
- Issue #3632: from the gdb debugger, the 'pyo' macro can now be called when
the GIL is released, or owned by another thread.
- Issue #4122: On Windows, fix a compilation error when using the
Py_UNICODE_ISSPACE macro in an extension module.
- Issue #4293: Py_AddPendingCall is now thread safe and can be used for
asynchronous notifications to python from any thread. Documentation added.
Extension Modules
-----------------
- Issue #3745: Fix hashlib to always reject unicode and non buffer-api
supporting objects as input no matter how it was compiled (built in
implementations or external openssl library).
- Issue #4397: Fix occasional test_socket failure on OS X.
- Issue #4279: Fix build of parsermodule under Cygwin.
- Issue #4051: Prevent conflict of UNICODE macros in cPickle.
- Issue #4228: Pack negative values the same way as 2.4 in struct's L format.
- Issue #1040026: Fix os.times result on systems where HZ is incorrect.
- Issues #3167, #3682: Fix test_math failures for log, log10 on Solaris,
OpenBSD.
- Issue #4365: Add crtassem.h constants to the msvcrt module.
- Issue #4396: The parser module now correctly validates the with statement.
Tests
-----
- Issue #5083: New 'gui' resource for regrtest.
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 #4301: Patch the logging module to add processName support, remove
_check_logger_class from multiprocessing.
- 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 occurred 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.
- The dl module has been deprecated for removal in Python 3.0.
- The Canvas module has been deprecated for removal in Python 3.0.
- The compiler package has been deprecated for removal in Python 3.0.
- The Bastion and rexec modules have been deprecated for removal in
Python 3.0.
- The bsddb185 module has been deprecated for removal in Python 3.0.
- The pure module has been deprecated for removal in Python 3.0.
- Issue #2487: change the semantics of math.ldexp(x, n) when n is too
large to fit in a C long. ldexp(x, n) now returns a zero (with
suitable sign) if n is large and negative; previously, it raised
OverflowError.
- The toaiff module has been deprecated for removal in Python 3.0.
- The test.testall module has been deprecated for removal in Python
3.0.
- The new module has been deprecated for removal in Python 3.0.
- The user module has been deprecated for removal in Python 3.0.
- The stringold module has been deprecated for removal in Python 3.0.
- The mutex module has been deprecated for removal in Python 3.0.
- The imputil module has been deprecated for removal in Python 3.0.
- test.test_support.catch_warning() gained a 'record' argument.
- os.path.walk is deprecated in favor of os.walk.
- pdb gained the "until" command.
- The Mac Modules (including Carbon) have been deprecated for removal
in Python 3.0.
- Library: on MacOS X you can now set ``ARCHFLAGS`` in the shell
environment to control the '-arch' flags that are used to build
an extension. This was added for compatibility with Apple's build
of Python.
- The bundled OSX-specific copy of libbffi is now in sync with the version
shipped with PyObjC 2.0 and includes support for x86_64 and ppc64 platforms.
- The threading module gained aliases for names that will be removed in the
3.x series.
Build
-----
- The Windows installer now includes Tk 8.5, bzip2 1.0.5, and SQLite 3.5.9.
- Patch #1722225: Support QNX 6.
- ``Lib/lib-old`` is now added to sys.path.
- On MacOS X it is now possible to install the framework in 64-bit
mode or even as a 4-way universal binary (that is, PPC, i386,
PPC64 and x86_64 support in one binary).
This is controlled by the configure argument ``--with-universal-archs``:
- ``--with-universal-archs=all``: install 4-way universal
- ``--with-universal-archs=32-bit``: install 2-way universal, 32-bit (the default)
- ``--with-universal-archs=64-bit``: install 2-way universal, 64-bit
This option should be used in combination with ``--enable-universalsdk=``.
NOTE: 64-bit and 4-way builds are only suppported on Mac OS X 10.5 (or later).
C API
-----
- Add ``PyType_Modified()`` as a public API to clear the type cache.
- The PyBytes functions have been renamed to PyByteArray.
- The PyString functions have been renamed to PyBytes. A batch of
defines were added so that the linker still sees the original
PyString names.
What's New in Python 2.6 alpha 3?
=================================
*Release date: 08-May-2008*
Core and builtins
-----------------
- Issue #2719: backported the ``next()`` builtin from Python 3.
- Issue #2681: The octal literal ``0o8`` was incorrecly acctepted. Now
it properly raises a SyntaxError.
- Issue #2617: Reserved -J and -X arguments for Jython, IronPython and
other implementations of Python.
- Implemented PEP 370: Per user site-packages directory.
Extension Modules
-----------------
- Issue #2670: Fix a failure in urllib2.build_opener(), when passed
two handlers that derive the same default base class.
- Added kill, terminate and send_signal(sig) to subprocess.Popen.
- Added phase(z) -> phi, polar(z) -> r, phi and rect(r, phi) -> z to
the cmath module.
- Four new methods were added to the math and cmath modules: acosh,
asinh, atanh and log1p.
- zlib.decompressobj().flush(value) no longer crashes the interpreter
when passed a value less than or equal to zero.
- Issue #1631171: Re-implement the 'warnings' module in C (the
original Python code has been kept as backup). This will allow for
using the 'warning's machinery in such places as the parser where
use of pure Python code is not possible. Both the ``showarning()``
and ``formatwarning()`` gain an optional 'line' argument which is
not called by default for backwards-compatibility reasons. Setting
``warnings.showwarning()`` to an implementation that lacks support
for the ``line`` argument will raise a DeprecationWarning.
Library
-------
- The audiodev module has been deprecated for removal in Python 3.0.
- Issue #2750: Add the 'json' package. Based on simplejson 1.9 and
contributed by Bob Ippolito.
- Issue #1734346: Support Unicode file names for zipfiles.
- Issue #2581: distutils: Vista UAC/elevation support for
bdist_wininst.
- Issue #2635: Fix bug in 'fix_sentence_endings' textwrap.fill option,
where an extra space was added after a word containing (but not
ending in) '.', '!' or '?'.
- Add from_buffer() and from_buffer_copy() class methods to ctypes
data types.
- Issue #2682: ctypes callback functions no longer contain a cyclic
reference to themselves.
- The getpass module has been improved on Unix. It now uses /dev/tty
by default and uses stderr instead of stdout. A GetPassWarning is
issued when input echo cannot be controlled.
- Issue #2014: Allow XML-RPC datetime objects to have dates before
1900-01-01.
- Issue #2439: Added new function pkgutil.get_data(), which is a
convenience wrapper for the PEP 302 get_data() API.
- Issue #2616: The ctypes.pointer() and ctypes.POINTER() functions are
now implemented in C for better performance.
- Issue #2408: The ``_types`` module, which was used as in
implementation detail of the public ``types`` module, has been
removed and replaced by pure python code.
- Issue #2513: distutils on Windows is now capable of cross-compiling
extension modules between 32 and 64 bit platforms. See the distutls
build documentation for more information.
- Issue #815646: Individual file objects may now be used from multiple
threads at once without fear of crashing the Python interpreter. If
file.close() is called while an object is in use by another thread
an IOError exception will be raised and the file will not be closed.
- The bundled libffi copy is now in sync with the recently released
libffi3.0.5 version, apart from some small changes to
Modules/_ctypes/libffi/configure.ac.
- Issue #2385: distutils.core.run_script() makes __file__ available,
so the controlled environment will more closely mirror the typical
script environment. This supports setup.py scripts that refer to
data files.
Tests
-----
- Issue #2550: The approach used by client/server code for obtaining
ports to listen on in network-oriented tests has been refined in an
effort to facilitate running multiple instances of the entire
regression test suite in parallel without issue.
test_support.bind_port() has been fixed such that it will always
return a unique port -- which wasn't always the case with the
previous implementation, especially if socket options had been set
that affected address reuse (i.e. SO_REUSEADDR, SO_REUSEPORT). The
new implementation of bind_port() will actually raise an exception
if it is passed an AF_INET/SOCK_STREAM socket with either the
SO_REUSEADDR or SO_REUSEPORT socket option set. Furthermore, if
available, bind_port() will set the SO_EXCLUSIVEADDRUSE option on
the socket it's been passed. This currently only applies to
Windows. This option prevents any other sockets from binding to the
host/port we've bound to, thus removing the possibility of the
'non-deterministic' behaviour, as Microsoft puts it, that occurs
when a second SOCK_STREAM socket binds and accepts to a host/port
that's already been bound by another socket. The optional preferred
port parameter to bind_port() has been removed. Under no
circumstances should tests be hard coding ports!
test_support.find_unused_port() has also been introduced, which will
pass a temporary socket object to bind_port() in order to obtain an
unused port. The temporary socket object is then closed and
deleted, and the port is returned. This method should only be used
for obtaining an unused port in order to pass to an external program
(i.e. the -accept [port] argument to openssl's s_server mode) or as
a parameter to a server-oriented class that doesn't give you direct
access to the underlying socket used.
Finally, test_support.HOST has been introduced, which should be used
for the host argument of any relevant socket calls (i.e. bind and
connect).
The following tests were updated to following the new conventions:
test_socket, test_smtplib, test_asyncore, test_ssl, test_httplib,
test_poplib, test_ftplib, test_telnetlib, test_socketserver,
test_asynchat and test_socket_ssl.
It is now possible for multiple instances of the regression test
suite to run in parallel without issue.
Build
-----
- Issue #1496032: On alpha, use -mieee when gcc is the compiler.
- Issue #2544: On HP-UX systems, use 'gcc -shared' for linking when
gcc is used as compiler.
- Issue #2573: On MacOS X it is now possible to install the framework
with a different name using --with-framework-name=NAME.
C API
-----
- Added implementation of copysign, acosh, asinh, atanh and log1p to
the new files Include/pymath.h and Python/pymath.h for platforms
which provide the functions through their libm. The files also
contains several helpers and constants for math.
- Added a new convenience macro, PyErr_WarnPy3k, for issuing Py3k warnings.
What's New in Python 2.6 alpha 2?
=================================
*Release date: 02-Apr-2008*
Core and builtins
-----------------
- Issue #1733757: The interpreter would hang on shutdown if the
tracing function set by sys.settrace is still active and happens to
call threading.currentThread().
- Patch #1442: properly report exceptions when the PYTHONSTARTUP file
cannot be executed.
- The compilation of a class nested in another class used to leak one
reference on the outer class name.
- Patch #1810: compile() can now compile _ast trees as returned by
``compile(..., PyCF_ONLY_AST)``.
- Patch #2426: Added sqlite3.Connection.iterdump method to allow easy
dumping of databases. Contributed by Paul Kippes at PyCon 2008.
- Patch #2477: Added from __future__ import unicode_literals.
- Added backport of bytearray type.
- Issue #2355: add Py3k warning for buffer().
- Issue #1477: With narrow Unicode builds, the unicode escape sequence
\Uxxxxxxxx did not accept values outside the Basic Multilingual
Plane. This affected raw unicode literals and the
'raw-unicode-escape' codec. Now UTF-16 surrogates are generated in
this case, like normal unicode literals and the 'unicode-escape'
codec.
- Issue #2348: add Py3k warning for file.softspace.
- Issue #2346/#2347: add Py3k warnings for __methods__ and
__members__.
- Issue #2358: Add a Py3k warning on sys.exc_clear() usage.
- Issue #2400: Allow relative imports to "import *".
- Issue #1745: Backport print function with ``from __future__ import
print_function``.
- Issue #2332: add new attribute names for instance method objects.
The two changes are: im_self -> __self__ and im_func -> __func__
- Issue #2379: Raise a Py3K warning for __getitem__ or __getslice__ on
exception instances.
- Issue #2371: Add a Py3k warning when catching an exception that
doesn't derive from BaseException.
- Issue #2341: Add a Py3k warning when raising an exception that
doesn't derive from BaseException.
- Issue #2321: use pymalloc for unicode object string data to reduce
memory usage in some circumstances.
- PEP 3127: octal literals now start with "0o". Old-style octal
literals are still valid. There are binary literals with a prefix of
"0b". This also affects int(x, 0).
- Issue #2359: Adding deprecation warnings for array.{read,write}.
- Issue #1779871: GNU gcc can now build Python on OS X because the
flags -Wno-long-double, -no-cpp-precomp, and -mno-fused-madd are no
longer passed.
- Add a warning when asserting a non-empty tuple which is always true.
- Issue #2179: speed up with statement execution by storing the exit
method on the stack instead of in a temporary variable (patch by
Jeffrey Yaskin)
- Issue #2238: Some syntax errors in *args and **kwargs expressions
could give bogus error messages.
- Issue #2143: Fix embedded readline() hang on SSL socket EOF.
Extension Modules
-----------------
- Patch #2240: Implement signal.setitimer and signal.getitimer.
Library
-------
- Issue #2315: logging.handlers: TimedRotatingFileHandler now accounts
for daylight savings time in calculating the next rollover.
- Issue #2316: logging.handlers: TimedRotatingFileHandler now
calculates rollovers correctly even when nothing is logged for a
while.
- Issue #2317: logging.handlers: TimedRotatingFileHandler now uses
improved logic for removing old files.
- Issue #2495: tokenize.untokenize now inserts a space between two
consecutive string literals; previously, ["" ""] was rendered as
[""""], which is incorrect python code.
- Issue #2248: return the result of the QUIT command. from
SMTP.quit().
- Backport of Python 3.0's io module.
- Issue #2482: Make sure that the coefficient of a Decimal is always
stored as a str instance, not as a unicode instance. This ensures
that str(Decimal) is always an instance of str.
- Issue #2478: fix failure of decimal.Decimal(0).sqrt()
- Issue #2432: give DictReader the dialect and line_num attributes
advertised in the docs.
- Issue #2460: Make Ellipsis object copyable.
- Issue #1681432: Add triangular distribution to the random module
- Issue #2136: urllib2's auth handler now allows single-quoted realms
in the WWW-Authenticate header.
- Issue #2434: Enhanced platform.win32_ver() to also work on Python
installation which do not have the win32all package installed.
- Added support to platform.uname() to also report the machine and
processor information on Windows XP and later. As a result,
platform.machine() and platform.processor() will report this
information as well.
- The library implementing the 2to3 conversion, lib2to3, was added to
the standard distribution.
- Issue #1747858: Fix chown to work with large uid's and gid's on
64-bit platforms.
- Issue #1202: zlib.crc32 and zlib.adler32 no longer return different
values on 32-bit vs. 64-bit python interpreters. Both were correct,
but they now both return a signed integer object for consistency.
- Issue #1158: add %f format (fractions of a second represented as
microseconds) to datetime objects. Understood by both strptime and
strftime.
- Issue #705836: struct.pack(">f", x) now raises OverflowError on all
platforms when x is too large to fit into an IEEE 754 float;
previously it only raised OverflowError on non IEEE 754 platforms.
- Issues #2166, #1741 and #1531505: now distutils deals with HOME
correctly under win32
- Patch #1858: distutils: added multiple server support in .pypirc
- Issue #1106316: pdb.post_mortem()'s parameter, "traceback", is now
optional: it defaults to the traceback of the exception that is
currently being handled (is mandatory to be in the middle of an
exception, otherwise it raises ValueError).
- Issue #1193577: A .shutdown() method has been added to SocketServers
which terminates the .serve_forever() loop.
- Issue #2220: handle rlcompleter attribute match failure more
gracefully.
- Issue #2225: py_compile, when executed as a script, now returns a
non- zero status code if not all files could be compiled
successfully.
- Bug #1725737: In distutils' sdist, exclude RCS, CVS etc. also in the
root directory, and also exclude .hg, .git, .bzr, and _darcs.
- Issue #1872: The struct module typecode for _Bool has been changed
from 't' to '?'.
- The bundled libffi copy is now in sync with the recently released
libffi3.0.4 version, apart from some small changes to
Modules/_ctypes/libffi/configure.ac. On OS X, preconfigured libffi
files are used. On all linux systems the --with-system-ffi
configure option defaults to "yes".
- Issue #1577: shutil.move() now calls os.rename() if the destination
is a directory instead of copying-then-remove-source.
Tests
-----
- test_nis no longer fails when test.test_support.verbose is true and
NIS is not set up on the testing machine.
- Output comparison tests are no longer supported.
- Rewrite test_errno to use unittest and no longer be a no-op.
- GHOP 234: Convert test_extcall to doctest.
- GHOP 290: Convert test_dbm and test_dummy_threading to unittest.
- GHOP 293: Convert test_strftime, test_getargs, and test_pep247 to
unittest.
- Issue #2055: Convert test_fcntl to unittest.
- Issue 1960: Convert test_gdbm to unittest.
- GHOP 294: Convert test_contains, test_crypt, and test_select to
unittest.
- GHOP 238: Convert test_tokenize to use doctest.
- GHOP 237: Rewrite test_thread using unittest.
- Patch #2232: os.tmpfile might fail on Windows if the user has no
permission to create files in the root directory.
Build
-----
- A new script 2to3 is now installed, to run the 2.x to 3.x converter.
- Python/memmove.c and Python/strerror.c have been removed; both
functions are in the C89 standard library.
- Patch #2284: Add -x64 option to rt.bat.
C API
-----
- Patch #2477: Added PyParser_ParseFileFlagsEx() and
PyParser_ParseStringFlagsFilenameEx().
What's New in Python 2.6 alpha 1?
=================================
*Release date: 29-Feb-2008*
Core and builtins
-----------------
- Issue #2051: pyc and pyo files are no longer created with permission
644. The mode is now inherited from the py file.
- Issue #2067: file.__exit__() now calls subclasses' close() method.
- Patch #1759: Backport of PEP 3129 class decorators.
- Issue #1881: An internal parser limit has been increased. Also see
issue 215555 for a discussion.
- Added the future_builtins module, which contains hex() and oct().
These are the PEP 3127 version of these functions, designed to be
compatible with the hex() and oct() builtins from Python 3.0. They
differ slightly in their output formats from the existing, unchanged
Python 2.6 builtins. The expected usage of the future_builtins
module is:
from future_builtins import hex, oct
- Issue #1600: Modifed PyOS_ascii_formatd to use at most 2 digit
exponents for exponents with absolute value < 100. Follows C99
standard. This is a change on Windows, which would use 3 digits.
Also, added 'n' to the formats that PyOS_ascii_formatd understands,
so that any alterations it does to the resulting string will be
available in stringlib/formatter.h (for float.__format__).
- Implemented PEP 3101, Advanced String Formatting. This adds a new
builtin format(); a format() method for str and unicode; a
__format__() method to object, str, unicode, int, long, float, and
datetime; the class string.Formatter; and the C API
PyObject_Format().
- Fixed several potential crashes, all caused by specially crafted
__del__ methods exploiting objects in temporarily inconsistent
state.
- Issue #2115: Important speedup in setting __slot__ attributes. Also
prevent a possible crash: an Abstract Base Class would try to access
a slot on a registered virtual subclass.
- Fixed repr() and str() of complex numbers with infinity or nan as
real or imaginary part.
- Clear all free lists during a gc.collect() of the highest generation
in order to allow pymalloc to free more arenas. Python may give back
memory to the OS earlier.
- Issue #2045: Fix an infinite recursion triggered when printing a
subclass of collections.defaultdict, if its default_factory is set
to a bound method.
- Fixed a minor memory leak in dictobject.c. The content of the free
list was not freed on interpreter shutdown.
- Limit free list of method and builtin function objects to 256
entries each.
- Patch #1953: Added ``sys._compact_freelists()`` and the C API
functions ``PyInt_CompactFreeList`` and ``PyFloat_CompactFreeList``
to compact the internal free lists of pre-allocted ints and floats.
- Issue #1983: Fixed return type of fork(), fork1() and forkpty()
calls. Python expected the return type int but the fork familie
returns pi_t.
- Issue #1678380: Fix a bug that identifies 0j and -0j when they
appear in the same code unit.
- Issue #2025: Add tuple.count() and tuple.index() methods to comply
with the collections.Sequence API.
- Patch #1970 by Antoine Pitrou: Speedup unicode whitespace and
linebreak detection
- Added ``PyType_ClearCache()`` and ``sys._clear_type_cache`` to clear
the internal lookup cache for ref leak tests.
- Patch #1473257: generator objects gain a gi_code attribute. This is
the same object as the func_code attribute of the function that
produced the generator.
- Issue #1920: "while 0" statements were completely removed by the
compiler, even in the presence of an "else" clause, which is
supposed to be run when the condition is false. Now the compiler
correctly emits bytecode for the "else" suite.
- A few crashers fixed: weakref_in_del.py (issue #1377858);
loosing_dict_ref.py (issue #1303614, test67.py);
borrowed_ref_[34].py (not in tracker).
- Issue #1069410: The "can't load dll" message box on Windows is
suppressed while an extension is loaded by calling SetErrorMode in
dynload_win.c. The error is still reported properly.
- Issue #1915: Python compiles with --enable-unicode=no again. However
several extension methods and modules do not work without unicode
support.
- Issue #1882: when compiling code from a string, encoding cookies in the
second line of code were not always recognized correctly.
- Issue #1679: "0x" was taken as a valid integer literal.
- Issue #1865: ``bytes`` as an alias for ``str`` and b"" as an alias "" were
added.
- sys.float_info / PyFloat_GetInfo: The floating point information
object was converted from a dict to a specialized structseq object.
- Patch #1816: Added sys.flags structseq. It exposes the status of
most command line arguments and PYTHON* environment variables.
- Objects/structseq.c: Implemented new structseq representation. The
patch makes structseqs (e.g. the return value of os.stat) more
readable.
- Patch #1700288: added a type attribute cache that caches method
accesses, resulting in speedups in heavily object-oriented code.
- Bug #1776: __import__() no longer accepts filenames on any platform.
The first parameter to __import__() must be a valid module name.
- Patch #1668: renamed THREADDEBUG envvar to PYTHONTHREADDEBUG.
- Patch #602345: Add -B command line option, PYTHONDONTWRITEBYTECODE
envvar and sys.dont_write_bytecode attribute. All these can be set
to forbid Python to attempt to write compiled bytecode files.
- Improve some exception messages when Windows fails to load an
extension module. Now we get for example '%1 is not a valid Win32
application' instead of 'error code 193'.
- Bug #1481296: Fixed long(float('nan')) != 0L.
- Issue #1640: Added math.isinf(x), math.isnan(x) and math.copysign(x,
y) functions.
- Issue #1635: Platform independent creation and representation of NaN
and INF. float("nan"), float("inf") and float("-inf") now work on
every platform with IEEE 754 semantics.
- Compiler now generates simpler and faster code for dictionary
literals. The oparg for BUILD_MAP now indicates an estimated
dictionary size. There is a new opcode, STORE_MAP, for adding
entries to the dictionary.
- Issue #1638: %zd configure test fails on Linux.
- Issue #1620: New property decorator syntax was modifying the
decorator in place instead of creating a new decorator object.
- Issue #1538: Avoid copying string in split/rsplit if the split char
is not found.
- Issue #1553: An erroneous __length_hint__ can make list() raise a
SystemError.
- PEP 366: Allow explicit relative imports when executing modules
inside packages with the -m switch via a new module level
__package__ attribute.
- Issue #1402: Fix a crash on exit, when another thread is still
running, and if the deallocation of its frames somehow calls the
PyGILState_Ensure() / PyGILState_Release() functions.
- Expose the Py_Py3kWarningFlag as sys.py3kwarning.
- Issue #1445: Fix a SystemError when accessing the ``cell_contents``
attribute of an empty cell object.
- Issue #1460: The utf-7 incremental decoder did not accept truncated
input. It now correctly saves its state between chunks of data.
- Patch #1739468: Directories and zipfiles containing a __main__.py
file can now be directly executed by passing their name to the
interpreter. The directory/zipfile is automatically inserted as the
first entry in sys.path.
- Issue #1265: Fix a problem with sys.settrace, if the tracing
function uses a generator expression when at the same time the
executed code is closing a paused generator.
- sets and frozensets now have an isdisjoint() method.
- optimize the performance of builtin.sum().
- Fix warnings found by the new version of the Coverity checker.
- The enumerate() builtin function is no longer bounded to sequences
smaller than LONG_MAX. Formerly, it raised an OverflowError. Now,
automatically shifts from ints to longs.
- Issue #1686386: Tuple's tp_repr did not take into account the
possibility of having a self-referential tuple, which is possible
from C code. Nor did object's tp_str consider that a type's tp_str
could do something that could lead to an inifinite recursion.
Py_ReprEnter() and Py_EnterRecursiveCall(), respectively, fixed the
issues.
- Issue #1164: It was possible to trigger deadlock when using the
'print' statement to write to a file since the GIL was not released
as needed. Now PyObject_Print() does the right thing along with
various tp_print implementations of the built-in types and those in
the collections module.
- Issue #1147: Exceptions were directly allowing string exceptions in
their throw() method even though string exceptions no longer
allowed.
- Issue #1096: Prevent a segfault from getting the repr of a very
deeply nested list by using the recursion counter.
- Issue #1202533: Fix infinite recursion calls triggered by calls to
PyObject_Call() never calling back out to Python code to trigger
recursion depth updates/checks. Required the creation of a static
RuntimeError instance in case normalizing an exception put the
recursion check value past its limit. Fixes crashers
infinite_rec_(1|2|4|5).py.
- Patch #1031213: Decode source line in SyntaxErrors back to its
original source encoding.
- Patch #1673759: add a missing overflow check when formatting floats
with %G.
- Prevent expandtabs() on string and unicode objects from causing a
segfault when a large width is passed on 32-bit platforms.
- Issue #1733488: Fix compilation of bufferobject.c on AIX.
- Issue #1722485: remove docstrings again when running with -OO.
- Add new attribute names for function objects. All the func_* become
__*__ attributes. (Some already existed, e.g., __doc__ and
__name__.)
- Add -3 option to the interpreter to warn about features that are
deprecated and will be changed/removed in Python 3.0.
- Patch #1686487: you can now pass any mapping after '**' in function
calls.
- except clauses may now be spelled either "except E, target:" or
"except E as target:". This is to provide forwards compatibility
with Python 3.0.
- Deprecate BaseException.message as per PEP 352.
- Issue #1303614: don't expose object's __dict__ when the dict is
inherited from a builtin base.
- When __slots__ are set to a unicode string, make it work the same as
setting a plain string, ie don't expand to single letter identifiers.
- Request #1191699: Slices can now be pickled.
- Request #1193128: str.translate() now allows a None argument for
translations that only remove characters without re-mapping the
remaining characters.
- Patch #1682205: a TypeError while unpacking an iterable is no longer
masked by a generic one with the message "unpack non-sequence".
- Remove unused file Python/fmod.c.
- Bug #1683368: The object.__init__() and object.__new__() methods are
now stricter in rejecting excess arguments. The only time when
either allows excess arguments is when it is not overridden and the
other one is. For backwards compatibility, when both are
overridden, it is a deprecation warning (for now; maybe a Py3k
warning later). Also, type.__init__() insists on the same signature
as supported by type.__new__().
- Patch #1675423: PyComplex_AsCComplex() now tries to convert an
object to complex using its __complex__() method before falling back
to the __float__() method. Therefore, the functions in the cmath
module now can operate on objects that define a __complex__()
method.
- Patch #1623563: allow __class__ assignment for classes with
__slots__. The old and the new class are still required to have the
same slot names.
- Patch #1642547: Fix an error/crash when encountering syntax errors
in complex if statements.
- Patch #1462488: Python no longer segfaults when
``object.__reduce_ex__()`` is called with an object that is faking
its type.
- Patch #1680015: Don't modify __slots__ tuple if it contains an
unicode name.
- Patch #1444529: the builtin compile() now accepts keyword arguments.
- Bug #1678647: write a newline after printing an exception in any
case, even when converting the value to a string failed.
- The dir() function has been extended to call the __dir__() method on
its argument, if it exists. If not, it will work like before. This
allows customizing the output of dir() in the presence of a
__getattr__().
- Patch #922167: Python no longer segfaults when faced with infinitely
self-recursive reload() calls (as reported by bug #742342).
- Patch #1675981: remove unreachable code from ``type.__new__()``
method.
- Patch #1491866: change the complex() constructor to allow
parthensized forms. This means complex(repr(x)) now works instead of
raising a ValueError.
- Patch #703779: unset __file__ in __main__ after running a file. This
makes the filenames the warning module prints much more sensible
when a PYTHONSTARTUP file is used.
- Variant of patch #697613: don't exit the interpreter on a SystemExit
exception if the -i command line option or PYTHONINSPECT environment
variable is given, but break into the interactive interpreter just
like on other exceptions or normal program exit.
- Patch #1638879: don't accept strings with embedded NUL bytes in
long().
- Bug #1674503: close the file opened by execfile() in an error
condition.
- Patch #1674228: when assigning a slice (old-style), check for the
sq_ass_slice instead of the sq_slice slot.
- When printing an unraisable error, don't print exceptions. before
the name. This duplicates the behavior whening normally printing
exceptions.
- Bug #1653736: Properly discard third argument to
slot_nb_inplace_power.
- PEP 352: Raising a string exception now triggers a TypeError.
Attempting to catch a string exception raises DeprecationWarning.
- Bug #1377858: Fix the segfaulting of the interpreter when an object
created a weakref on itself during a __del__ call for new-style
classes (classic classes still have the bug).
- Bug #1579370: Make PyTraceBack_Here use the current thread, not the
frame's thread state.
- patch #1630975: Fix crash when replacing sys.stdout in
sitecustomize.py.
- Prevent seg fault on shutdown which could occur if an object raised
a warning.
- Bug #1566280: Explicitly invoke threading._shutdown from Py_Main, to
avoid relying on atexit.
- Bug #1590891: random.randrange don't return correct value for big
number.
- Patch #1586791: Better exception messages for some operations on
strings, tuples and lists.
- Bug #1067760: Deprecate passing floats to file.seek.
- Bug #1591996: Correctly forward exception in instance_contains().
- Bug #1588287: fix invalid assertion for `1,2` in debug builds.
- Bug #1576657: when setting a KeyError for a tuple key, make sure
that the tuple isn't used as the "exception arguments tuple".
- Bug #1565514: SystemError not raised on too many nested blocks.
- Bug #1576174: WindowsError now displays the windows error code
again, no longer the posix error code.
- Patch #1549049: Support long values in structmember, issue warnings
if the assigned value for structmember fields gets truncated.
- Update the peephole optimizer to remove more dead code (jumps after
returns) and inline unconditional jumps to returns.
- Bug #1545497: when given an explicit base, int() did ignore NULs
embedded in the string to convert.
- Bug #1569998: break inside a try statement (outside a loop) is now
recognized and rejected.
- list.pop(x) accepts any object x following the __index__ protocol.
- A number of places, including integer negation and absolute value,
were fixed to not rely on undefined behaviour of the C compiler
anymore.
- Bug #1566800: make sure that EnvironmentError can be called with any
number of arguments, as was the case in Python 2.4.
- Patch #1567691: super() and new.instancemethod() now don't accept
keyword arguments any more (previously they accepted them, but
didn't use them).
- Fix a bug in the parser's future statement handling that led to
"with" not being recognized as a keyword after, e.g., this
statement: from __future__ import division, with_statement
- Bug #1557232: fix seg fault with def f((((x)))) and def f(((x),)).
- Fix %zd string formatting on Mac OS X so it prints negative numbers.
- Allow exception instances to be directly sliced again.
- Bug #1551432: Exceptions do not define an explicit __unicode__
method. This allows calling unicode() on exceptions classes
directly to succeed.
- Bug #1542051: Exceptions now correctly call PyObject_GC_UnTrack.
Also make sure that every exception class has __module__ set to
'exceptions'.
- Bug #1550983: emit better error messages for erroneous relative
imports (if not in package and if beyond toplevel package).
- Overflow checking code in integer division ran afoul of new gcc
optimizations. Changed to be more standard-conforming.
- Patch #1542451: disallow continue anywhere under a finally.
- Patch #1546288: fix seg fault in dict_equal due to ref counting bug.
- The return tuple from str.rpartition(sep) is (tail, sep, head) where
head is the original string if sep was not found.
- Bug #1520864: unpacking singleton tuples in list comprehensions and
generator expressions (x for x, in ... ) works again. Fixing this
problem required changing the .pyc magic number. This means that
.pyc files generated before 2.5c2 will be regenerated.
- ``with`` and ``as`` are now keywords.
- Bug #1664966: Fix crash in exec if Unicode filename can't be
decoded.
- Issue #1537: Changed GeneratorExit's base class from Exception to
BaseException.
- Issue #1703448: A joined thread could show up in the
threading.enumerate() list after the join() for a brief period until
it actually exited.
Library
-------
- Patch #2274: Add heapq.heappushpop().
- Add inspect.isabstract(object) to fix bug #2223
- Add a __format__ method to Decimal, to support PEP 3101.
- Add a timing parameter when using trace.Trace to print out
timestamps.
- Issue #1627: httplib now ignores negative Content-Length headers.
- Issue #900744: If an invalid chunked-encoding header is sent by a
server, httplib will now raise IncompleteRead and close the
connection instead of raising ValueError.
- Issue #1492: The content type of BaseHTTPServer error messages can
now be overridden.
- Issue #1781: ConfigParser now does not let you add the "default" section
(ignore-case)
- Removed uses of dict.has_key() from distutils, and uses of
callable() from copy_reg.py, so the interpreter now starts up
without warnings when '-3' is given. More work like this needs to
be done in the rest of the stdlib.
- Issue #1916: added isgenerator() and isgeneratorfunction() to
inspect.py.
- Issue #1224: Fixed bad url parsing when path begins with double
slash.
- ctypes instances that are not or do not contain pointers can now be
pickled.
- Patch #1966: Break infinite loop in httplib when the servers
implements the chunked encoding incorrectly.
- Rename rational.py to fractions.py and the rational.Rational class
to fractions.Fraction, to avoid the name clash with the abstract
base class numbers.Rational. See discussion in issue #1682.
- The pickletools module now provides an optimize() function that
eliminates unused PUT opcodes from a pickle string.
- Patch #2021: Allow tempfile.NamedTemporaryFile and
SpooledTemporaryFile to be used in with statements by correctly
supporting the context management protocol.
- Patch #1979: Add rich comparisons to Decimal, and make Decimal
comparisons involving a NaN follow the IEEE 754 standard.
- Issue #2004: tarfile.py: Use mode 0700 for temporary directories and
default permissions for missing directories.
- Issue #175006: The debugger used to skip the condition of a "while"
statement after the first iteration. Now it correctly steps on the
expression, and breakpoints on the "while" statement are honored on
each loop.
- Issue #1765140: add an optional delay argument to FileHandler and
its subclasses. Defaults to false (existing behaviour), but if true,
defers opening the file until the first call to emit().
- The pprint module now supports sets and frozensets.
- Issue #1221598: add optional callbacks to ftplib.FTP's storbinary()
and storlines() methods. (Contributed by Phil Schwartz)
- Issue #1715: include sub-extension modules in pydoc's text output.
- Issue #1836: fix an off-by-one bug in TimedRotatingHandler's
rollover time calculation.
- Issue #1021: fix a bug to allow basicConfig to accept NOTSET as a
level.
- Issue #932563: add LoggerAdapter convenience class to make it easier
to add contextual information in logging output.
- Issue #1760556: fix a bug to avoid FileHandler throwing an exception
in flush().
- Bug #1530959: distutils' build command now uses different build
directory when building extension modules against versions of Python
compiled with ``--with-pydebug``.
- Issue #1555501: move plistlib from plat-mac directory to general
library.
- Issue #1269: fix a bug in pstats.add_callers() and add a unit test
file for pstats.
- Issue #1669: don't allow shutil.rmtree() to be called on a symlink
to a directory.
- Issue #1664522: in urllib, don't read non-existing directories in
ftp mode, returning a 0-byte file -- raise an IOError instead.
- Issue #856047: respect the ``no_proxy`` environment variable when
using the ``http_proxy`` etc. environment variables in urllib.
- Issue #1178141: add a getcode() method to the addinfourls that
urllib.open() returns so that you can retrieve the HTTP status code.
- Issue #1003: Fix zipfile decryption check, it would fail zip files
with extended local headers.
- Issue #1189216: Fix the zipfile module to work on archives with
headers past the 2**31 byte boundary.
- Issue #1336: fix a race condition in subprocess.Popen if the garbage
collector kicked in at the wrong time that would cause the process
to hang when the child wrote to stderr.
- Issue #1146: fix how textwrap breaks a long word that would start in
the last column of a line.
- Issue #1693149: trace.py --ignore-module - accept multiple
comma-separated modules to be given.
- Issue #1822: MIMEMultipart.is_multipart() behaves correctly for a
just-created (and empty) instance. Thanks Jonathan Share.
- Issue #1861: Added an attribute to the sched module which returns an
ordered list of upcoming events (displayed as named tuples).
- Issue #1837: The queue module now also supports a LIFO queue and a
priority queue.
- Patch #1048820: Add insert-mode editing to curses.textpad.Textbox
(patch by Stefan Wehr). Also, fix an off-by-one bug in
Textbox.gather().
- Issue #1831: ctypes now raises a TypeError if conflicting positional
and named arguments are passed to a Structure or Union initializer.
When too many positional arguments are passed, also a TypeError is
raised instead of a ValueError.
- Convert the internal ctypes array type cache to a WeakValueDict so
that array types do not live longer than needed.
- Issue #1786: pdb should use its own stdin/stdout around an exec call
and when creating a recursive instance.
- Issue #1698398: ZipFile.printdir() crashed because the format string
expected a tuple type of length six instead of time.struct_time
object.
- Issue #1780: The Decimal constructor now accepts arbitrary leading
and trailing whitespace when constructing from a string.
Context.create_decimal no longer accepts trailing newlines.
- Decimal.as_tuple(), difflib.find_longest_match() and inspect
functions that returned a tuple now return a named tuple.
- Doctest now returns results as a named tuple for readability:
(0, 7) --> TestResults(failed=0, attempted=7)
- Issue #846388:q re.match is interruptible now, which is particularly
good for long regular expression matches.
- Patch #1137: allow setting buffer_size attribute on pyexpat Parser
objects to set the character data buffer size.
- Issue #1757: The hash of a Decimal instance is no longer affected by
the current context.
- Patch #467924: add ZipFile.extract() and ZipFile.extractall() in the
zipfile module.
- Issue #1646: Make socket support the TIPC protocol.
- Bug #1742: return os.curdir from os.path.relpath() if both arguments
are equal instead of raising an exception.
- Patch #1637: fix urlparse for URLs like 'http://x.com?arg=/foo'.
- Patch #1698: allow '@' in username parsed by urlparse.py.
- Issue #1735: TarFile.extractall() now correctly sets directory
permissions and times.
- Bug #1713: posixpath.ismount() claims symlink to a mountpoint is a mountpoint.
- Bug #1687: Fxed plistlib.py restricts <integer> to Python int when
writing
- Issue #1700: Regular expression inline flags incorrectly handle
certain unicode characters.
- Issue #1689: PEP 3141, numeric abstract base classes.
- Tk issue #1851526: Return results from Python callbacks to Tcl as
Tcl objects.
- Issue #1642: Fix segfault in ctypes when trying to delete attributes.
- Issue #1727780: Support loading pickles of random.Random objects
created on 32-bit systems on 64-bit systems, and vice versa. As a
consequence of the change, Random pickles created by Python 2.6
cannot be loaded in Python 2.5.
- Issue #1455: The distutils package now supports VS 2005 and VS 2008
for both the msvccompiler and cygwincompiler.
- Issue #1531: tarfile.py: Read fileobj from the current offset, do
not seek to the start.
- Issue #1534: Added a dictionary sys.float_info with information
about the internal floating point type to the sys module.
- Issue #1429818: patch for trace and doctest modules so they play
nicely together.
- doctest made a bad assumption that a package's __loader__.get_data()
method used universal newlines.
- Issue #1705170: contextlib.contextmanager was still swallowing
StopIteration in some cases. This should no longer happen.
- Issue #1292: On alpha, arm, ppc, and s390 linux systems the
--with-system-ffi configure option defaults to "yes".
- IN module for FreeBSD 8 is added and preexisting FreeBSD 6 and 7
files are updated.
- Issues #1181, #1287: unsetenv() is now called when the
os.environ.pop() and os.environ.clear() methods are used.
- ctypes will now work correctly on 32-bit systems when Python is
configured with --with-system-ffi.
- Patch #1203: ctypes now does work on OS X when Python is built with
--disable-toolbox-glue.
- collections.deque() now supports a "maxlen" argument.
- itertools.count() is no longer bounded to LONG_MAX. Formerly, it
raised an OverflowError. Now, automatically shifts from ints to
longs.
- Added itertools.product() which forms the Cartesian product of the
input iterables.
- Added itertools.combinations() and itertools.permutations().
- Patch #1541463: optimize performance of cgi.FieldStorage operations.
- Decimal is fully updated to the latest Decimal Specification
(v1.66).
- Bug #1153: repr.repr() now doesn't require set and dictionary items
to be orderable to properly represent them.
- A 'c_longdouble' type was added to the ctypes module.
- Bug #1709599: Run test_1565150 only if the file system is NTFS.
- When encountering a password-protected robots.txt file the
RobotFileParser no longer prompts interactively for a username and
password (bug 813986).
- TarFile.__init__() no longer fails if no name argument is passed and
the fileobj argument has no usable name attribute (e.g. StringIO).
- The functools module now provides 'reduce', for forward
compatibility with Python 3000.
- Server-side SSL support and cert verification added, by Bill
Janssen.
- socket.ssl deprecated; use new ssl module instead.
- uuid creation is now threadsafe.
- EUC-KR codec now handles the cheot-ga-keut composed make-up hangul
syllables.
- GB18030 codec now can encode additional two-byte characters that are
missing in GBK.
- Add new codecs for UTF-32, UTF-32-LE and UTF-32-BE.
- Bug #1704793: Return UTF-16 pair if unicodedata.lookup cannot
represent the result in a single character.
- Bug #978833: Close https sockets by releasing the _ssl object.
- Change location of the package index to pypi.python.org/pypi
- Bug #1701409: Fix a segfault in printing ctypes.c_char_p and
ctypes.c_wchar_p when they point to an invalid location. As a
sideeffect the representation of these instances has changed.
- tarfile.py: Added "exclude" keyword argument to TarFile.add().
- Bug #1734723: Fix repr.Repr() so it doesn't ignore the maxtuple
attribute.
- The urlopen function of urllib2 now has an optional timeout
parameter (note that it actually works with HTTP, HTTPS, FTP and
FTPS connections).
- In ftplib, the FTP.ntransfercmd method, when in passive mode, now
uses the socket.create_connection function, using the timeout
specified at connection time.
- Bug #1728403: Fix a bug that CJKCodecs StreamReader hangs when it
reads a file that ends with incomplete sequence and sizehint
argument for .read() is specified.
- Bug #1730389: Change time.strptime() to use ``\s+`` instead of
``\s*`` when matching spaces in the specified format argument.
- Bugs #1668596/#1720897: distutils now copies data files even if
package_dir is empty.
- sha now raises a DeprecationWarning upon import.
- md5 now raises a DeprecationWarning upon import.
- Issue #1385: The hmac module now computes the correct hmac when
using hashes with a block size other than 64 bytes (such as sha384
and sha512).
- mimify now raises a DeprecationWarning upon import.
- MimeWriter now raises a DeprecationWarning upon import.
- tarfile.py: Improved unicode support. Unicode input names are now
officially supported. Added "errors" argument to the TarFile class.
- urllib.ftpwrapper class now accepts an optional timeout.
- shlex.split() now has an optional "posix" parameter.
- The posixfile module now raises a DeprecationWarning.
- Remove the gopherlib module. This also leads to the removal of
gopher support in urllib/urllib2.
- Fix bug in marshal where bad data would cause a segfault due to lack
of an infinite recursion check.
- Removed plat-freebsd2 and plat-freebsd3 directories (and IN.py in
the directories).
- HTML-escape the plain traceback in cgitb's HTML output, to prevent
the traceback inadvertently or maliciously closing the comment and
injecting HTML into the error page.
- The popen2 module and os.popen* are deprecated. Use the subprocess
module.
- Added an optional credentials argument to SMTPHandler, for use with
SMTP servers which require authentication.
- Patch #1695948: Added optional timeout parameter to SocketHandler.
- Bug #1652788: Minor fix for currentframe.
- Patch #1598415: Added WatchedFileHandler to better support external
log file rotation using e.g. newsyslog or logrotate. This handler is
only useful in Unix/Linux environments.
- Bug #1706381: Specifying the SWIG option "-c++" in the setup.py file
(as opposed to the command line) will now write file names ending in
".cpp" too.
- As specified in RFC 2616, an HTTP response like 2xx indicates that
the client's request was successfully received, understood, and
accepted. Now in these cases no error is raised in urllib (issue
#1177) and urllib2.
- Bug #1290505: time.strptime's internal cache of locale information
is now properly recreated when the locale is changed.
- Patch #1685563: remove (don't add) duplicate paths in
distutils.MSVCCompiler.
- Added a timeout parameter to the constructor of other protocols
(telnetlib, ftplib, smtplib and poplib). This is second part of the
work started with create_connection() and timeout in httplib, and
closes patch #723312.
- Patch #1676823: Added create_connection() to socket.py, which may be
called with a timeout, and use it from httplib (whose HTTPConnection
and HTTPSConnection now accept an optional timeout).
- Bug #978833: Revert r50844, as it broke _socketobject.dup.
- Bug #1675967: re patterns pickled with Python 2.4 and earlier can
now be unpickled with Python 2.5 and newer.
- Patch #1630118: add a SpooledTemporaryFile class to tempfile.py.
- Patch #1273829: os.walk() now has a "followlinks" parameter. If set
to True (which is not the default), it visits symlinks pointing to
directories.
- Bug #1681228: the webbrowser module now correctly uses the default
GNOME or KDE browser, depending on whether there is a session of one
of those present. Also, it tries the Windows default browser before
trying Mozilla variants.
- Patch #1339796: add a relpath() function to os.path.
- Patch #1681153: the wave module now closes a file object it opened if
initialization failed.
- Bug #767111: fix long-standing bug in urllib which caused an
AttributeError instead of an IOError when the server's response
didn't contain a valid HTTP status line.
- Patch #957650: "%var%" environment variable references are now
properly expanded in ntpath.expandvars(), also "~user" home
directory references are recognized and handled on Windows.
- Patch #1429539: pdb now correctly initializes the __main__ module
for the debugged script, which means that imports from __main__ work
correctly now.
- The nonobvious commands.getstatus() function is now deprecated.
- Patch #1393667: pdb now has a "run" command which restarts the
debugged Python program, optionally with different arguments.
- Patch #1649190: Adding support for _Bool to ctypes as c_bool.
- Patch #1530482: add pydoc.render_doc() which returns the
documentation for a thing instead of paging it to stdout, which
pydoc.doc() does.
- Patch #1533909: the timeit module now accepts callables in addition
to strings for the code to time and the setup code. Also added two
convenience functions for instantiating a Timer and calling its
methods.
- Patch #1537850: tempfile.NamedTemporaryFile now has a "delete"
parameter which can be set to False to prevent the default
delete-on-close behavior.
- Patch #1581073: add a flag to textwrap that prevents the dropping of
whitespace while wrapping.
- Patch #1603688: ConfigParser.SafeConfigParser now checks values that
are set for invalid interpolation sequences that would lead to
errors on reading back those values.
- Added support for the POSIX.1-2001 (pax) format to
tarfile.py. Extended and cleaned up the test suite. Added a new
testtar.tar.
- Patch #1449244: Support Unicode strings in
email.message.Message.{set_charset,get_content_charset}.
- Patch #1542681: add entries for "with", "as" and "CONTEXTMANAGERS"
to pydoc's help keywords.
- Patch #1555098: use str.join() instead of repeated string
concatenation in robotparser.
- Patch #1635454: the csv.DictWriter class now includes the offending
field names in its exception message if you try to write a record
with a dictionary containing fields not in the CSV field names list.
- Patch #1668100: urllib2 now correctly raises URLError instead of
OSError if accessing a local file via the file:// protocol fails.
- Patch #1677862: Require a space or tab after import in .pth files.
- Patch #1192590: Fix pdb's "ignore" and "condition" commands so they
trap the IndexError caused by passing in an invalid breakpoint
number.
- Patch #1599845: Add an option to disable the implicit calls to
server_bind() and server_activate() in the constructors for
TCPServer, SimpleXMLRPCServer and DocXMLRPCServer.
- Bug #1531963: Make SocketServer.TCPServer's server_address always be
equal to calling getsockname() on the server's socket. Fixed by
patch #1545011.
- Patch #742598: Add .timeout attribute to SocketServer that calls
.handle_timeout() when no requests are received.
- Bug #1651235: When a tuple was passed to a ctypes function call,
Python would crash instead of raising an error.
- Bug #1646630: ctypes.string_at(buf, 0) and ctypes.wstring_at(buf, 0)
returned string up to the first NUL character.
- Patch #957003: Implement smtplib.LMTP.
- Patch #1481079: add support for HTTP_REFERER to CGIHTTPServer.
- Patch #1675424: Added tests for uncovered code in the zipfile
module. The KeyError raised by Zipfile.getinfo for nonexistent
names now has a descriptive message.
- Bug #1115886: os.path.splitext('.cshrc') gives now ('.cshrc', '').
- unittest now verifies more of its assumptions. In particular,
TestCase and TestSuite subclasses (not instances) are no longer
accepted in TestSuite.addTest(). This should cause no
incompatibility since it never made sense with ordinary subclasses
-- the failure just occurred later, with a more cumbersome
exception.
- Patch #787789: allow to pass custom TestRunner instances to
unittest's main() function.
- Patches #1550273, #1550272: fix a few bugs in unittest and add a
comprehensive test suite for the module.
- Patch #1001604: glob.glob() now returns unicode filenames if it was
given a unicode argument and os.listdir() returns unicode filenames.
- Patch #1673619: setup.py identifies extension modules it doesn't
know how to build and those it knows how to build but that fail to
build.
- Patch #912410: Replace HTML entity references for attribute values
in HTMLParser.
- Patch #1663234: you can now run doctest on test files and modules
using "python -m doctest [-v] filename ...".
- Patch #1121142: Implement ZipFile.open.
- Taught setup.py how to locate Berkeley DB on Macs using MacPorts.
- Added heapq.merge() for merging sorted input streams.
- Added collections.namedtuple() for assigning field names to tuples.
- Added itertools.izip_longest().
- Have the encoding package's search function dynamically import using
absolute import semantics.
- Patch #1647484: Renamed GzipFile's filename attribute to name.
- Patch #1517891: Mode 'a' for ZipFile now creates the file if it
doesn't exist.
- Patch #698833: Support file decryption in zipfile.
- Patch #685268: Consider a package's __path__ in imputil.
- Patch #1463026: Support default namespace in XMLGenerator.
- Patch #1571379: Make trace's --ignore-dir facility work in the face
of relative directory names.
- Bug #1600860: Search for shared python library in LIBDIR, not
lib/python/config, on "linux" and "gnu" systems.
- Patch #1652681: tarfile.py: create nonexistent files in append mode
and allow appending to empty files.
- Bug #1124861: Automatically create pipes if GetStdHandle fails in
subprocess.
- Patch #1634778: add missing encoding aliases for iso8859_15 and
iso8859_16.
- Patch #1638243: the compiler package is now able to correctly
compile a with statement; previously, executing code containing a
with statement compiled by the compiler package crashed the
interpreter.
- Bug #1643943: Fix time.strptime's support for the %U directive.
- Patch #1507247: tarfile.py: use current umask for intermediate
directories.
- Patch #1627441: close sockets properly in urllib2.
- Bug #494589: make ntpath.expandvars behave according to its
docstring.
- Changed platform module API python_version_tuple() to actually
return a tuple (it used to return a list).
- Added new platform module APIs python_branch(), python_revision(),
python_implementation() and linux_distribution().
- Added support for IronPython and Jython to the platform module.
- The sets module has been deprecated. Use the built-in set/frozenset
types instead.
- Bug #1610795: make ctypes.util.find_library work on BSD systems.
- Fixes for 64-bit Windows: In ctypes.wintypes, correct the
definitions of HANDLE, WPARAM, LPARAM data types. Make
parameterless foreign function calls work.
- The version number of the ctypes package changed to "1.1.0".
- Bug #1627575: logging: Added _open() method to FileHandler which can
be used to reopen files. The FileHandler instance now saves the
encoding (which can be None) in an attribute called "encoding".
- Bug #411881: logging.handlers: bare except clause removed from
SMTPHandler.emit. Now, only ImportError is trapped.
- Bug #411881: logging.handlers: bare except clause removed from
SocketHandler.createSocket. Now, only socket.error is trapped.
- Bug #411881: logging: bare except clause removed from
LogRecord.__init__. Now, only ValueError, TypeError and
AttributeError are trapped.
- Patch #1504073: Fix tarfile.open() for mode "r" with a fileobj
argument.
- Patch #1182394 from Shane Holloway: speed up HMAC.hexdigest.
- Patch #1262036: Prevent TarFiles from being added to themselves
under certain conditions.
- Patch #1230446: tarfile.py: fix ExFileObject so that read() and
tell() work correctly together with readline().
- Patch #1484695: The tarfile module now raises a HeaderError
exception if a buffer given to frombuf() is invalid.
- Bug #1503765: Fix a problem in logging.config with spaces in comma-
separated lists read from logging config files.
- Patch #1604907: Fix problems in logging.handlers caused at logging
shutdown when syslog handlers fail to initialize because of syslogd
problems.
- Patch #1608267: fix a race condition in os.makedirs() if the
directory to be created is already there.
- Patch #1610437: fix a tarfile bug with long filename headers.
- Patch #1371075: Make ConfigParser accept optional dict type for
ordering, sorting, etc.
- Bug #1563807: _ctypes built on AIX fails with ld ffi error.
- Bug #1598620: A ctypes Structure cannot contain itself.
- Patch #1070046: Marshal new-style objects like InstanceType in
xmlrpclib.
- cStringIO.truncate(-1) now raises an IOError, like StringIO and
regular files.
- Patch #1472877: Fix Tix subwidget name resolution.
- Patch #1594554: Always close a tkSimpleDialog on ok(), even if an
exception occurs.
- Patch #1538878: Don't make tkSimpleDialog dialogs transient if the
parent window is withdrawn.
- Bug #1597824: return the registered function from atexit.register()
to facilitate usage as a decorator.
- Patch #1360200: Use unmangled_version RPM spec field to deal with
file name mangling.
- Patch #1359217: Process 2xx response in an ftplib transfer that
precedes an 1xx response.
- Patch #1355023: support whence argument for GzipFile.seek.
- Patch #1065257: Support passing open files as body in
HTTPConnection.request().
- Bug #1569790: mailbox.py: Maildir.get_folder() and MH.get_folder()
weren't passing the message factory on to newly created Maildir/MH
objects.
- Patch #1514543: mailbox.py: In the Maildir class, report errors if
there's a filename clash instead of possibly losing a message.
(Patch by David Watson.)
- Patch #1514544: Try to ensure that messages/indexes have been
physically written to disk after calling .flush() or
.close(). (Patch by David Watson.)
- Patch #1592250: Add elide argument to Tkinter.Text.search.
- Patch #838546: Make terminal become controlling in pty.fork().
- Patch #1351744: Add askyesnocancel helper for tkMessageBox.
- Patch #1060577: Extract list of RPM files from spec file in
bdist_rpm.
- Bug #1586613: fix zlib and bz2 codecs' incremental en/decoders.
- Patch #1583880: fix tarfile's problems with long names and posix/
GNU modes.
- Bug #1586448: the compiler module now emits the same bytecode for
list comprehensions as the builtin compiler, using the LIST_APPEND
opcode.
- Fix codecs.EncodedFile which did not use file_encoding in 2.5.0, and
fix all codecs file wrappers to work correctly with the "with"
statement (bug #1586513).
- Lib/modulefinder.py now handles absolute and relative imports
correctly.
- Patch #1567274: Support SMTP over TLS.
- Patch #1560695: Add .note.GNU-stack to ctypes' sysv.S so that ctypes
isn't considered as requiring executable stacks.
- ctypes callback functions only support 'fundamental' data types as
result type. Raise an error when something else is used. This is a
partial fix for Bug #1574584.
- Fix turtle so that time.sleep is imported for the entire library.
Allows the demo2 function to be executed on its own instead of only
when the module is run as a script.
- Bug #813342: Start the IDLE subprocess with -Qnew if the parent is
started with that option.
- Bug #1565150: Fix subsecond processing for os.utime on Windows.
- Support for MSVC 8 was added to bdist_wininst.
- Bug #1446043: correctly raise a LookupError if an encoding name
given to encodings.search_function() contains a dot.
- Bug #1560617: in pyclbr, return full module name not only for
classes, but also for functions.
- Bug #1457823: cgi.(Sv)FormContentDict's constructor now takes
keep_blank_values and strict_parsing keyword arguments.
- Bug #1566602: correct failure of posixpath unittest when $HOME ends
with a slash.
- Bug #1565661: in webbrowser, split() the command for the default
GNOME browser in case it is a command with args.
- Made the error message for time.strptime when the data data and
format do match be more clear.
- Fix a bug in traceback.format_exception_only() that led to an error
being raised when print_exc() was called without an exception set.
In version 2.4, this printed "None", restored that behavior.
- Make webbrowser.BackgroundBrowser usable in Windows (it wasn't
because the close_fds arg to subprocess.Popen is not supported).
- Reverted patch #1504333 to sgmllib because it introduced an infinite
loop.
- Patch #1553314: Fix the inspect.py slowdown that was hurting IPython
& SAGE by adding smarter caching in inspect.getmodule()
- Fix missing import of the types module in logging.config.
- Patch #1550886: Fix decimal module context management implementation
to match the localcontext() example from PEP 343.
- Bug #1545341: The 'classifier' keyword argument to the Distutils
setup() function now accepts tuples as well as lists.
- Bug #1541863: uuid.uuid1 failed to generate unique identifiers on
systems with low clock resolution.
- Bug #1531862: Do not close standard file descriptors in subprocess.
- idle: Honor the "Cancel" action in the save dialog (Debian bug
#299092).
- Fix utf-8-sig incremental decoder, which didn't recognise a BOM when
the first chunk fed to the decoder started with a BOM, but was
longer than 3 bytes.
- The implementation of UnicodeError objects has been simplified
(start and end attributes are now stored directly as Py_ssize_t
members).
- Issue #829951: In the smtplib module, SMTP.starttls() now complies
with RFC 3207 and forgets any knowledge obtained from the server not
obtained from the TLS negotiation itself. Patch contributed by Bill
Fenner.
- Issue #1339: The smtplib.SMTP class has been refactored a bit such
that the SMTP.starttls() caller no longer needs to call ehlo()
beforehand. SMTP.starttls() now raises an exception of the server
does not claim to support starttls. Adds the
SMTP.ehlo_or_helo_if_needed() method. Patch contributed by Bill
Fenner.
- Patch #1089358: Add signal.siginterrupt, a wrapper around
siginterrupt(3).
Extension Modules
-----------------
- Patch #1657: added select.epoll and select.kqueue.
- Patch #1506171: added operator.methodcaller().
- Patch #1826: operator.attrgetter() now supports dotted attribute paths.
- Patch #1957: syslogmodule: Release GIL when calling syslog(3).
- Bug #2112: mmap.error is now a subclass of EnvironmentError and not
a direct EnvironmentError.
- Bug #2111: mmap segfaults when trying to write a block opened with
PROT_READ.
- Bug #2063: correct order of utime and stime in os.times() result on
Windows.
- Patch #1736: Fix file name handling of _msi.FCICreate.
- Updated ``big5hkscs`` codec to the HKSCS revision of 2004.
- Issue #1940: make it possible to use curses.filter() before
curses.initscr() as the documentation says.
- Backport of _fileio module from Python 3.0.
- Patch #1087741: mmap.mmap is now a class, not a factory function. It
is also subclassable now.
- Patch #1648: added ``sys.getprofile()`` and ``sys.gettrace()``.
- Patch #1663329: added ``os.closerange()`` function to quickly close
a range of file descriptors without considering errors.
- Patch #976880: ``mmap`` objects now have an ``rfind`` method that
works as expected. ``mmap.find`` also takes an optional ``end``
parameter.
- _winreg's HKEY object has gained __enter__ and __exit__ methods to
support the context manager protocol. The _winreg module also
gained a new function ``ExpandEnvironmentStrings`` to expand
REG_EXPAND_SZ keys.
- itertools.starmap() now accepts any iterable input. Previously, it
required the function inputs to be tuples.
- itertools.chain() now has an alternate constructor,
chain.from_iterable().
- Issue #1646: Make socket support TIPC. The socket module now has
support for TIPC under Linux, see http://tipc.sf.net/ for more
information.
- Added interface for Windows' WSAIoctl to socket object and added an
example for a simple network sniffer.
- Bug #1301: Bad assert in _tkinter fixed.
- Added bdist_wininst executable for VS 2008.
- Bug #1604: collections.deque.__init__(iterable) now clears any prior
contents before adding elements from the iterable. This fix brings
the behavior into line with that for list.__init__().
- Added wide char functions to msvcrt module: getwch, getwche, putwch
and ungetwch. The functions accept or return unicode.
- os.access now returns True on Windows for any existing directory.
- Added warnpy3k function to the warnings module.
- Marshal.dumps() now expects exact type matches for int, long, float,
complex, tuple, list, dict, set, and frozenset. Formerly, it would
silently miscode subclasses of those types. Now, it raises a
ValueError instead.
- Patch #1388440: Add set_completion_display_matches_hook and
get_completion_type to readline.
- Bug #1649098: Avoid declaration of zero-sized array declaration in
structure.
- Removed the rgbimg module; been deprecated since Python 2.5.
- Bug #1721309: prevent bsddb module from freeing random memory.
- Bug #1233: fix bsddb.dbshelve.DBShelf append method to work as
intended for RECNO databases.
- pybsddb.sf.net Bug #477182: Load the database flags at database open
time so that opening a database previously created with the DB_DUP
or DB_DUPSORT flag set will keep the proper behavior on subsequent
opens. Specifically: dictionary assignment to a DB object will
replace all values for a given key when the database allows
duplicate values. DB users should use DB.put(k, v) when they want
to store duplicates; not DB[k] = v.
- Add the bsddb.db.DBEnv.lock_id_free method.
- Bug #1686475: Support stat'ing open files on Windows again.
- Patch #1185447: binascii.b2a_qp() now correctly quotes binary
characters with ASCII value less than 32. Also, it correctly quotes
dots only if they occur on a single line, as opposed to the previous
behavior of quoting dots if they are the second character of any
line.
- Bug #1622896: fix a rare corner case where the bz2 module raised an
error in spite of a succesful compression.
- Patch #1654417: make operator.{get,set,del}slice use the full range
of Py_ssize_t.
- Patch #1646728: datetime.fromtimestamp fails with negative
fractional times. With unittest.
- Patch #1490190: posixmodule now includes os.chflags() and
os.lchflags() functions on platforms where the underlying system
calls are available.
- Patch #1494140: Add documentation for the new struct.Struct object.
- Patch #1432399: Support the HCI protocol for bluetooth sockets
- Patch #1657276: Make NETLINK_DNRTMSG conditional.
- Bug #1653736: Complain about keyword arguments to time.isoformat.
- Bug #1486663: don't reject keyword arguments for subclasses of
builtin types.
- Patch #1610575: The struct module now supports the 't' code, for C99
_Bool.
- Patch #1635058: ensure that htonl and friends never accept or return
negative numbers, per the underlying C implementation.
- Patch #1544279: Improve thread-safety of the socket module by moving
the sock_addr_t storage out of the socket object.
- Patch #1019808: fix bug that causes an incorrect error to be
returned when a socket timeout is set and a connection attempt
fails.
- Speed up function calls into the math module.
- Bug #1588217: don't parse "= " as a soft line break in binascii's
a2b_qp() function, instead leave it in the string as quopri.decode()
does.
- Bug #1599782: Fix segfault on bsddb.db.DB().type().
- Bug #1567666: Emulate GetFileAttributesExA for Win95.
- Patch #1576166: Support os.utime for directories on Windows NT+.
- Patch #1572724: fix typo ('=' instead of '==') in _msi.c.
- Bug #1572832: fix a bug in ISO-2022 codecs which may cause segfault
when encoding non-BMP unicode characters.
- Bug #1556784: allow format strings longer than 127 characters in
datetime's strftime function.
- Fix itertools.count(n) to work with negative numbers again.
- RLIMIT_SBSIZE was added to the resource module where available.
- Bug #1551427: fix a wrong NULL pointer check in the win32 version of
os.urandom().
- Bug #1548092: fix curses.tparm seg fault on invalid input.
- Patch #1114: fix curses module compilation on 64-bit AIX, & possibly
other 64-bit LP64 platforms where attr_t is not the same size as a
long. (Contributed by Luke Mewburn.)
- Bug #1550714: fix SystemError from itertools.tee on negative value
for n.
- Fixed a few bugs on cjkcodecs:
- gbk and gb18030 codec now handle U+30FB KATAKANA MIDDLE DOT
correctly.
- iso2022_jp_2 codec now encodes into G0 for KS X 1001, GB2312
codepoints to conform the standard.
- iso2022_jp_3 and iso2022_jp_2004 codec can encode JIS X 0213:2
codepoints now.
- Bug #1552726: in readline.c, avoid repeatedly polling in interactive
mode by only placing a timeout on the select() if an input hook has
been defined. This prevents an interactive Python from waking up 10
times per second. Patch by Richard Boulton.
- fixed a bug with bsddb.DB.stat: the flags and txn keyword arguments
were transposed.
- Added support for linking the bsddb module against BerkeleyDB 4.5.x,
4.6.x and 4.7.x.
- Bug #1633621: if curses.resizeterm() or curses.resize_term() is
called, update _curses.LINES, _curses.COLS, curses.LINES and
curses.COLS.
- Fix an off-by-one bug in locale.strxfrm().
- Fix libffi configure for hppa*-*-linux* | parisc*-*-linux*.
- Build using system ffi library on arm*-linux*.
- Bug #1372: zlibmodule.c: int overflow in PyZlib_decompress
- bsddb module: Fix memory leak when using database cursors on
databases without a DBEnv.
- The sqlite3 module was updated to pysqlite 2.4.1.
Tests
-----
- Refactor test_logging to use unittest.
- Refactor test_profile and test_cprofile to use the same code to
profile.
- Make test_runpy reentrant by fixing _check_module to clear out any
module being tested. Was causing an error by __import__ doing a
reload on the second run and thus suppressing bytecode recreation.
- Capture socket connection resets and timeouts in test_socket_ssl and
test_urllib2net and raise test.test_support.ResourceDenied.
- Patch #1559413: Fix test_cmd_line if sys.executable contains a
space.
- Added test.test_support.TransientResource which is a context manager
to surround calls to resources that are not guaranteed to work even
if test.test_support.requires says that the resource should exist.
- Added a test for slicing of an exception.
- Added test.test_support.EnvironmentVarGuard. It's a class that
provides a context manager so that one can temporarily set or unset
environment variables.
- Added some tests for modulefinder.
- Converted test_imp to use unittest.
- Fix bsddb test_basics.test06_Transactions to check the version
number properly.
- test.test_support.catch_warning is a new context manager that can be
used to catch the warnings issued by the warning framework.
Tools
-----
- Tools/scripts/reindent.py now creates the backup file using
shutil.copy to preserve user/group and permissions. Added also a
--nobackup option to not create the backup if the user is concerned
regarding this. Check issue 1050828 for more details.
- Tools/scripts/win_add2path.py was added. The simple script modifes
the PATH environment var of the HKCU tree and adds the python bin
and script directory.
- Tools/18n/pygettext.py was added to the list of scripts installed by
Tools/scripts/setup.py (tracker item 642309).
- Added IronPython and Jython support to pybench (part of which was
patch #1563844).
- Made some minor changes to pybench output to allow the user to see
which Python version is running pybench.
- Added support for the new platform module feature
platform.python_implementation(); this will now be saved in the
benchmark pickle.
Documentation
-------------
- RFE #1765140: Updated documentation on FileHandler and subclasses to
include new optional delay argument.
- Bug #932563: Added section on getting contextual information into
logging output, and added documentation for the new LoggerAdapter
class.
- Bug #1295: Added information about caching of formatted exception
information in the LogRecord by Formatter.format().
- Bug #1637365: add subsection about "__name__ == __main__" to the
Python tutorial.
- Patch #1698768: updated the "using Python on the Mac" intro.
- Bug #1569057: Document that calling file.next() when the file is
open for writing is undefined.
- Patch #1489771: the syntax rules in Python Reference Manual were
updated to reflect the current Python syntax.
- Patch #1686451: Fix return type for
PySequence_{Count,Index,Fast_GET_SIZE}.
- Patch #1679379: add documentation for fnmatch.translate().
- Bug #1629566: clarify the docs on the return values of parsedate()
and parsedate_tz() in email.utils and rfc822.
- Patch #1671450: add a section about subclassing builtin types to the
"extending and embedding" tutorial.
- Bug #1629125: fix wrong data type (int -> Py_ssize_t) in PyDict_Next
docs.
- Bug #1565919: document set types in the Language Reference.
- Bug #1546052: clarify that PyString_FromString(AndSize) copies the
string pointed to by its parameter.
- Bug #1566663: remove obsolete example from datetime docs.
- Bug #1541682: Fix example in the "Refcount details" API docs.
Additionally, remove a faulty example showing PySequence_SetItem
applied to a newly created list object and add notes that this isn't
a good idea.
Tools/Demos
-----------
- Patch #1552024: add decorator support to unparse.py demo script.
- Make auto-generated python.vim file list built-ins and exceptions in
alphatbetical order. Makes output more deterministic and easier to
tell if the file is stale or not.
- Bug #1546372: Fixed small bugglet in pybench that caused a missing
file not to get reported properly.
Build
-----
- Have the search path for building extensions follow the declared
order in $CPPFLAGS and $LDFLAGS when adding directories from those
environment variables.
- Bug #1983: Added a check to pyport to verify that sizeof(pid_t) is
smaller or equal sizeof(long).
- Bug #1234: Fixed semaphore errors on AIX 5.2
- Issue #1726: Remove Python/atof.c from PCBuild/pythoncore.vcproj.
- Removed PCbuild8/ directory and added a new build directory for VS
2005 based on the VS 2008 build directory to PC/VS8.0. The script
PCbuild/vs8to9.py was added to sync changes from PCbuild to
PC/VS8.0.
- Moved PCbuild/ directory for VS 2003 to PC/VS7.1 and renamed
PCBuild9/ directory to PCBuild/.
- Bug #1699: Define _BSD_SOURCE only on OpenBSD.
- Bug #1608: use -fwrapv when GCC supports it. This is important,
newer GCC versions may optimize away overflow buffer overflow checks
without this option!
- Patch #1418: Make the AC_REPLACE_FUNCS object files actually work.
- Add a FAST_LOOPS build option that speeds-up looping by trading away
periodic threadstate and signal checking in tight loops. By
default, this option is turned-off. It should only be enabled in
debugged, performance critical applications.
- Patch #786737: Allow building in a tree of symlinks pointing to a
readonly source.
- Bug #1737210: Change Manufacturer of Windows installer to PSF.
- Bug #1746880: Correctly install DLLs into system32 folder on Win64.
- Define _BSD_SOURCE, to get access to POSIX extensions on OpenBSD
4.1+.
- Stop supporting AtheOS and cause a build error in configure for the
platform.
- Bug #1655392: don't add -L/usr/lib/pythonX.Y/config to the LDFLAGS
returned by python-config if Python was built with --enable-shared
because that prevented the shared library from being used.
- Patch #1569798: fix a bug in distutils when building Python from a
directory within sys.exec_prefix.
- Bug #1675511: Use -Kpic instead of -xcode=pic32 on Solaris/x86.
- Disable _XOPEN_SOURCE on NetBSD 1.x.
- configure now checks whether gcc supports the PyArg_ParseTuple
format attribute.
- Bug #1578513: Cross compilation was broken by a change to configure.
Repair so that it's back to how it was in 2.4.3.
- Patch #1576954: Update VC6 build directory; remove redundant files
in VC7.
- Bug #1568842: Fix test for uintptr_t.
- Patch #1540470: for OpenBSD 4.0.
- Fix build failure on kfreebsd and on the hurd.
- Fix the build of the library reference in info format.
- Allow Emacs 22 for building the documentation in info format.
- Makefile.pre.in(buildbottest): Run an optional script
pybuildbot.identify to include some information about the build
environment.
C API
-----
- Unified naming convention for free lists and their limits. All free
lists in Object/ are named ``free_list``, the counter ``numfree``
and the upper limit is a macro ``PyName_MAXFREELIST`` inside an
#ifndef block.
- ``PySet_Add()`` can now modify a newly created frozenset. Similarly
to ``PyTuple_SetItem``, it can be used to populate a brand new
frozenset; but it does not steal a reference to the added item.
- Added ``PySet_Check()`` and ``PyFrozenSet_Check()`` to the set API.
- Backport of PyUnicode_FromString(), _FromStringAndSize(), _Format
and _FormatV from Python 3.0. Made PyLong_AsSsize_t and
PyLong_FromSsize_t public functions.
- Patch #1720595: add T_BOOL to the range of structmember types.
- Issue #1534: Added ``PyFloat_GetMax()``, ``PyFloat_GetMin()`` and
``PyFloat_GetInfo()`` to the float API.
- Issue #1521: On 64bit platforms, using PyArgs_ParseTuple with the t#
of w# format code incorrectly truncated the length to an int, even
when PY_SSIZE_T_CLEAN is set. The str.decode method used to return
incorrect results with huge strings.
- Issue #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE,
Py_TYPE and Py_REFCNT.
- PEP 3123: Provide forward compatibility with Python 3.0, while
keeping backwards compatibility. Add Py_Refcnt, Py_Type, Py_Size,
and PyVarObject_HEAD_INIT.
- Py_ssize_t fields work in structmember when HAVE_LONG_LONG is not
defined.
- Patch #1733960: Allow T_LONGLONG to accept ints.
- T_PYSSIZET can now be used in PyMemberDef lists for Py_ssize_t members.
- Added a new API function ``PyImport_ImportModuleNoBlock``.
- Bug #1637022: Prefix AST symbols with _Py_.
- Fix some leftovers from the conversion from int to Py_ssize_t
(relevant to strings and sequences of more than 2**31 items).
- Make _PyGILState_NoteThreadState() static, it was not used anywhere
outside of pystate.c and should not be necessary.
- ``PyImport_Import`` and ``PyImport_ImportModule`` now always do
absolute imports. In earlier versions they might have used relative
imports under some conditions.
- Added case insensitive comparison methods ``PyOS_stricmp(char*,
char*)`` and ``PyOS_strnicmp(char*, char*, Py_ssize_t)``.
- Bug #1542693: remove semi-colon at end of PyImport_ImportModuleEx
macro so it can be used as an expression.
Windows
-------
- Patch #1706: Drop support for Win9x, WinME and NT4. Python now
requires Windows 2000 or greater. The _WINVER and NTDDI_VERSION
macros are set to Win2k for x86/32bit builds and WinXP for AMD64
builds.
- Conditionalize definition of _CRT_SECURE_NO_DEPRECATE and
_CRT_NONSTDC_NO_DEPRECATE.
- Bug #1216: Restore support for Visual Studio 2002.
Mac
---
- cfmfile now raises a DeprecationWarning.
- buildtools now raises a DeprecationWarning.
- Removed the macfs module. It had been deprecated since Python 2.5.
This lead to the deprecation of macostools.touched() as it relied
solely on macfs and was a no-op under OS X.
----
**(For information about older versions, consult the HISTORY file.)**