Python News

+++++++++++

What's New in Python 2.7.2?

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

*Release date: 2011-06-11*

Library

-------

- Issue #12009: Fixed regression in netrc file comment handling.

Extension Modules

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

- Issue #1221: Make pyexpat.__version__ equal to the Python version.

What's New in Python 2.7.2 release candidate 1?

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

*Release date: 2011-05-29*

Core and Builtins

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

- Issue #9670: Increase the default stack size for secondary threads on

Mac OS X and FreeBSD to reduce the chances of a crash instead of a

"maximum recursion depth" RuntimeError exception.

(patch by Ronald Oussoren)

- Correct lookup of __dir__ on objects. This allows old-style classes to have

__dir__. It also causes errors besides AttributeError found on lookup to be

propagated.

- Issue #1195: Fix input() if it is interrupted by CTRL+d and then CTRL+c,

clear the end-of-file indicator after CTRL+d.

- Issue #8651: PyArg_Parse*() functions raise an OverflowError if the file

doesn't have PY_SSIZE_T_CLEAN define and the size doesn't fit in an int

(length bigger than 2^31-1 bytes).

- Issue #8651: Fix "z#" format of PyArg_Parse*() function: the size was not

written if PY_SSIZE_T_CLEAN is defined.

- Issue #9756: When calling a method descriptor or a slot wrapper descriptor,

the check of the object type doesn't read the __class__ attribute anymore.

Fix a crash if a class override its __class__ attribute (e.g. a proxy of the

str type). Patch written by Andreas Stührk.

- Issue #10517: After fork(), reinitialize the TLS used by the PyGILState_*

APIs, to avoid a crash with the pthread implementation in RHEL 5. Patch

by Charles-François Natali.

- Issue #6780: fix starts/endswith error message to mention that tuples are

accepted too.

- Issue #5057: fix a bug in the peepholer that led to non-portable pyc files

between narrow and wide builds while optimizing BINARY_SUBSCR on non-BMP

chars (e.g. u"\U00012345"[0]).

- Issue #11650: PyOS_StdioReadline() retries fgets() if it was interrupted

(EINTR), for example if the program is stopped with CTRL+z on Mac OS X. Patch

written by Charles-Francois Natali.

- Issue #11144: Ensure that int(a_float) returns an int whenever possible.

Previously, there were some corner cases where a long was returned even

though the result was within the range of an int.

- Issue #11450: Don't truncate hg version info in Py_GetBuildInfo() when

there are many tags (e.g. when using mq). Patch by Nadeem Vawda.

- Issue #10451: memoryview objects could allow to mutate a readable buffer.

Initial patch by Ross Lagerwall.

- Issue #10892: Don't segfault when trying to delete __abstractmethods__ from a

class.

- Issue #8020: Avoid a crash where the small objects allocator would read

non-Python managed memory while it is being modified by another thread.

Patch by Matt Bandy.

- Issue #11004: Repaired edge case in deque.count().

- Issue #8278: On Windows and with a NTFS filesystem, os.stat() and os.utime()

can now handle dates after 2038.

- Issue #4236: Py_InitModule4 now checks the import machinery directly

rather than the Py_IsInitialized flag, avoiding a Fatal Python

error in certain circumstances when an import is done in __del__.

- issue #11828: startswith and endswith don't accept None as slice index.

Patch by Torsten Becker.

- Issue #10674: Remove unused 'dictmaker' rule from grammar.

- Issue #10596: Fix float.__mod__ to have the same behaviour as

float.__divmod__ with respect to signed zeros. -4.0 % 4.0 should be

0.0, not -0.0.

- Issue #11386: bytearray.pop() now throws IndexError when the bytearray is

empty, instead of OverflowError.

Library

-------

- Issue #12161: Cause StringIO.getvalue() to raise a ValueError when used on a

closed StringIO instance.

- Issue #12182: Fix pydoc.HTMLDoc.multicolumn() if Python uses the new (true)

division (python -Qnew). Patch written by Ralf W. Grosse-Kunstleve.

- Issue #12175: RawIOBase.readall() now returns None if read() returns None.

- Issue #12175: FileIO.readall() now raises a ValueError instead of an IOError

if the file is closed.

- Issue #1441530: In imaplib, use makefile() to wrap the SSL socket to avoid

heap fragmentation and MemoryError with some malloc implementations.

- Issue #12100: Don't reset incremental encoders of CJK codecs at each call to

their encode() method anymore, but continue to call the reset() method if the

final argument is True.

- Issue #12124: zipimport doesn't keep a reference to zlib.decompress() anymore

to be able to unload the module.

- Issue #11088: don't crash when using F5 to run a script in IDLE on MacOSX

with Tk 8.5.

- Issue #10154, #10090: change the normalization of UTF-8 to "UTF-8" instead

of "UTF8" in the locale module as the latter is not supported MacOSX and OpenBSD.

- Issue #9516: avoid errors in sysconfig when MACOSX_DEPLOYMENT_TARGET is

set in shell.

- Issue #12050: zlib.decompressobj().decompress() now clears the unconsumed_tail

attribute when called without a max_length argument.

- Issue #12062: In the `io` module, fix a flushing bug when doing a certain

type of I/O sequence on a file opened in read+write mode (namely: reading,

seeking a bit forward, writing, then seeking before the previous write but

still within buffered data, and writing again).

- Issue #8498: In socket.accept(), allow to specify 0 as a backlog value in

order to accept exactly one connection. Patch by Daniel Evers.

- Issue #12012: ssl.PROTOCOL_SSLv2 becomes optional.

- Issue #11164: Remove obsolete allnodes test from minidom test.

- Issue #11927: SMTP_SSL now uses port 465 by default as documented. Patch

by Kasun Herath.

- Issue 11999: fixed sporadic sync failure mailbox.Maildir due to its trying to

detect mtime changes by comparing to the system clock instead of to the

previous value of the mtime.

- Issue #10684: shutil.move used to delete a folder on case insensitive

filesystems when the source and destination name where the same except

for the case.

- Issue #11982: fix json.loads('""') to return u'' rather than ''.

- Issue #11277: mmap.mmap() calls fcntl(fd, F_FULLFSYNC) on Mac OS X to get

around a mmap bug with sparse files. Patch written by Steffen Daode Nurpmeso.

- Issue #10761: Fix tarfile.extractall failure when symlinked files are

present. Initial patch by Scott Leerssen.

- Issue #11763: don't use difflib in TestCase.assertMultiLineEqual if the

strings are too long.

- Issue #11236: getpass.getpass responds to ctrl-c or ctrl-z on terminal.

- Issue #11768: The signal handler of the signal module only calls

Py_AddPendingCall() for the first signal to fix a deadlock on reentrant or

parallel calls. PyErr_SetInterrupt() writes also into the wake up file.

- Issue #11875: collections.OrderedDict's __reduce__ was temporarily

mutating the object instead of just working on a copy.

- Issue #11442: Add a charset parameter to the Content-type in SimpleHTTPServer

to avoid XSS attacks.

- Issue #11467: Fix urlparse behavior when handling urls which contains scheme

specific part only digits. Patch by Santoso Wijaya.

- collections.Counter().copy() now works correctly for subclasses.

- Issue #11474: Fix the bug with url2pathname() handling of '/C|/' on Windows.

Patch by Santoso Wijaya.

- Issue #9233: Fix json.loads('{}') to return a dict (instead of a list), when

_json is not available.

- Issue #11703: urllib2.geturl() does not return correct url when the original

url contains #fragment.

- Issue #10019: Fixed regression in json module where an indent of 0 stopped

adding newlines and acted instead like 'None'.

- Issue #5162: Treat services like frozen executables to allow child spawning

from multiprocessing.forking on Windows.

- Issue #4877: Fix a segfault in xml.parsers.expat while attempting to parse

a closed file.

- Issue #11830: Remove unnecessary introspection code in the decimal module.

It was causing a failed import in the Turkish locale where the locale

sensitive str.upper() method caused a name mismatch.

- Issue #8428: Fix a race condition in multiprocessing.Pool when terminating

worker processes: new processes would be spawned while the pool is being

shut down. Patch by Charles-François Natali.

- Issue #7311: Fix HTMLParser to accept non-ASCII attribute values.

- Issue #10963: Ensure that subprocess.communicate() never raises EPIPE.

- Issue #11662: Make urllib and urllib2 ignore redirections if the

scheme is not HTTP, HTTPS or FTP (CVE-2011-1521).

- Issue #11256: Fix inspect.getcallargs on functions that take only keyword

arguments.

- Issue #11696: Fix ID generation in msilib.

- Issue #9696: Fix exception incorrectly raised by xdrlib.Packer.pack_int when

trying to pack a negative (in-range) integer.

- Issue #11675: multiprocessing.[Raw]Array objects created from an integer size

are now zeroed on creation. This matches the behaviour specified by the

documentation.

- Issue #7639: Fix short file name generation in bdist_msi.

- Issue #11666: let help() display named tuple attributes and methods

that start with a leading underscore.

- Issue #11673: Fix multiprocessing Array and RawArray constructors to accept a

size of type 'long', rather than only accepting 'int'.

- Issue #10042: Fixed the total_ordering decorator to handle cross-type

comparisons that could lead to infinite recursion.

- Issue #10979: unittest stdout buffering now works with class and module

setup and teardown.

- Issue #11569: use absolute path to the sysctl command in multiprocessing to

ensure that it will be found regardless of the shell PATH. This ensures

that multiprocessing.cpu_count works on default installs of MacOSX.

- Issue #11500: Fixed a bug in the os x proxy bypass code for fully qualified

IP addresses in the proxy exception list.

- Issue #11131: Fix sign of zero in plus and minus operations when

the context rounding mode is ROUND_FLOOR.

- Issue #5622: Fix curses.wrapper to raise correct exception if curses

initialization fails.

- Issue #11391: Writing to a mmap object created with

``mmap.PROT_READ|mmap.PROT_EXEC`` would segfault instead of raising a

TypeError. Patch by Charles-François Natali.

- Issue #11306: mailbox in certain cases adapts to an inability to open

certain files in read-write mode. Previously it detected this by

checking for EACCES, now it also checks for EROFS.

- Issue #11265: asyncore now correctly handles EPIPE, EBADF and EAGAIN errors

on accept(), send() and recv().

- Issue #11326: Add the missing connect_ex() implementation for SSL sockets,

and make it work for non-blocking connects.

- Issue #10956: Buffered I/O classes retry reading or writing after a signal

has arrived and the handler returned successfully.

- Issue #10680: Fix mutually exclusive arguments for argument groups in

argparse.

- Issue #4681: Allow mmap() to work on file sizes and offsets larger than

4GB, even on 32-bit builds. Initial patch by Ross Lagerwall, adapted for

32-bit Windows.

- Issue #10360: In WeakSet, do not raise TypeErrors when testing for

membership of non-weakrefable objects.

- Issue #10549: Fix pydoc traceback when text-documenting certain classes.

- Issue #940286: pydoc.Helper.help() ignores input/output init parameters.

- Issue #11171: Fix detection of config/Makefile when --prefix !=

--exec-prefix, which caused Python to not start.

- Issue #11116: any error during addition of a message to a mailbox now causes

a rollback, instead of leaving the mailbox partially modified.

- Issue #8275: Fix passing of callback arguments with ctypes under Win64.

Patch by Stan Mihai.

- Issue #10940: Workaround an IDLE hang on Mac OS X 10.6 when using the

menu accelerators for Open Module, Go to Line, and New Indent Width.

The accelerators still work but no longer appear in the menu items.

- Issue #10907: Warn OS X 10.6 IDLE users to use ActiveState Tcl/Tk 8.5, rather

than the currently problematic Apple-supplied one, when running with the

64-/32-bit installer variant.

- Issue #11052: Correct IDLE menu accelerators on Mac OS X for Save

commands.

- Issue #10949: Improved robustness of rotating file handlers.

- Issue #10955: Fix a potential crash when trying to mmap() a file past its

length. Initial patch by Ross Lagerwall.

- Issue #10898: Allow compiling the posix module when the C library defines

a symbol named FSTAT.

- Issue #6075: IDLE on Mac OS X now works with both Carbon AquaTk and

Cocoa AquaTk.

- Issue #10916: mmap should not segfault when a file is mapped using 0 as

length and a non-zero offset, and an attempt to read past the end of file

is made (IndexError is raised instead). Patch by Ross Lagerwall.

- Issue #10875: Update Regular Expression HOWTO; patch by 'SilentGhost'.

- Issue #10827: Changed the rules for 2-digit years. The time.asctime

function will now format any year when ``time.accept2dyear`` is

false and will accept years >= 1000 otherwise. The year range

accepted by ``time.mktime`` and ``time.strftime`` is still system

dependent, but ``time.mktime`` will now accept full range supported

by the OS. Conversion of 2-digit years to 4-digit is deprecated.

- Issue #10869: Fixed bug where ast.increment_lineno modified the root

node twice.

- Issue #7858: Raise an error properly when os.utime() fails under Windows

on an existing file.

- Issue #3839: wsgiref should not override a Content-Length header set by

the application. Initial patch by Clovis Fabricio.

- Issue #10806, issue #9905: Fix subprocess pipes when some of the standard

file descriptors (0, 1, 2) are closed in the parent process. Initial

patch by Ross Lagerwall.

- Issue #4662: os.tempnam(), os.tmpfile() and os.tmpnam() now raise a py3k

DeprecationWarning.

- Subclasses of collections.OrderedDict now work correctly with __missing__.

- Issue #10753 - Characters ';', '=' and ',' in the PATH_INFO environment

variable won't be quoted when the URI is constructed by the wsgiref.util 's

request_uri method. According to RFC 3986, these characters can be a part of

params in PATH component of URI and need not be quoted.

- Issue #10738: Fix webbrowser.Opera.raise_opts

- Issue #9824: SimpleCookie now encodes , and ; in values to cater to how

browsers actually parse cookies.

- Issue #1379416: eliminated a source of accidental unicode promotion in

email.header.Header.encode.

- Issue #5258/#10642: if site.py encounters a .pth file that generates an error,

it now prints the filename, line number, and traceback to stderr and skips

the rest of that individual file, instead of stopping processing entirely.

- Issue #10750: The ``raw`` attribute of buffered IO objects is now read-only.

- Issue #10242: unittest.TestCase.assertItemsEqual makes too many assumptions

about input.

- Issue #10611: SystemExit should not cause a unittest test run to exit.

- Issue #6791: Limit header line length (to 65535 bytes) in http.client,

to avoid denial of services from the other party.

- Issue #10404: Use ctl-button-1 on OSX for the context menu in Idle.

- Issue #9907: Fix tab handling on OSX when using editline by calling

rl_initialize first, then setting our custom defaults, then reading .editrc.

- Issue #4188: Avoid creating dummy thread objects when logging operations

from the threading module (with the internal verbose flag activated).

- Issue #9721: Fix the behavior of urljoin when the relative url starts with a

';' character. Patch by Wes Chow.

- Issue #10714: Limit length of incoming request in http.server to 65536 bytes

for security reasons. Initial patch by Ross Lagerwall.

- Issue #9558: Fix distutils.command.build_ext with VS 8.0.

- Issue #10695: passing the port as a string value to telnetlib no longer

causes debug mode to fail.

- Issue #10107: Warn about unsaved files in IDLE on OSX.

- Issue #10406: Enable Rstrip IDLE extension on OSX (just like on other

platforms).

- Issue #10478: Reentrant calls inside buffered IO objects (for example by

way of a signal handler) now raise a RuntimeError instead of freezing the

current process.

- Issue #10497: Fix incorrect use of gettext in argparse.

- Issue #10464: netrc now correctly handles lines with embedded '#' characters.

- Issue #1731717: Fixed the problem where subprocess.wait() could cause an

OSError exception when The OS had been told to ignore SIGCLD in our process

or otherwise not wait for exiting child processes.

- Issue #9509: argparse now properly handles IOErrors raised by

argparse.FileType.

- Issue #9348: Raise an early error if argparse nargs and metavar don't match.

- Issue #8982: Improve the documentation for the argparse Namespace object.

- Issue #9343: Document that argparse parent parsers must be configured before

their children.

- Issue #9026: Fix order of argparse sub-commands in help messages.

- Issue #9347: Fix formatting for tuples in argparse type= error messages.

Extension Modules

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

- Stop using the old interface for providing methods and attributes in the _sre

module. Among other things, this gives these classes ``__class__``

attributes. (See #12099)

- Issue #10169: Fix argument parsing in socket.sendto() to avoid error masking.

- Issue #12051: Fix segfault in json.dumps() while encoding highly-nested

objects using the C accelerations.

- Issue #12017: Fix segfault in json.loads() while decoding highly-nested

objects using the C accelerations.

- Issue #1838: Prevent segfault in ctypes, when _as_parameter_ on a class is set

to an instance of the class.

- Issue #678250: Make mmap flush a noop on ACCESS_READ and ACCESS_COPY.

Build

-----

- Issue #11217: For 64-bit/32-bit Mac OS X universal framework builds,

ensure "make install" creates symlinks in --prefix bin for the "-32"

files in the framework bin directory like the installer does.

- Issue #11411: Fix 'make DESTDIR=' with a relative destination.

- Issue #10709: Add updated AIX notes in Misc/README.AIX.

- Issue #11184: Fix large-file support on AIX.

- Issue #941346: Fix broken shared library build on AIX.

- Issue #11268: Prevent Mac OS X Installer failure if Documentation

package had previously been installed.

- Issue #11079: The /Applications/Python x.x folder created by the Mac

OS X installers now includes a link to the installed documentation.

- Issue #11054: Allow Mac OS X installer builds to again work on 10.5 with

the system-provided Python.

- Issue #10843: Update third-party library versions used in OS X

32-bit installer builds: bzip2 1.0.6, readline 6.1.2, SQLite 3.7.4

(with FTS3/FTS4 and RTREE enabled), and ncursesw 5.5 (wide-char

support enabled).

- Don't run pgen twice when using make -j.

- Issue #7716: Under Solaris, don't assume existence of /usr/xpg4/bin/grep in

the configure script but use $GREP instead. Patch by Fabian Groffen.

- Issue #10475: Don't hardcode compilers for LDSHARED/LDCXXSHARED on NetBSD

and DragonFly BSD. Patch by Nicolas Joly.

- Issue #10655: Fix the build on PowerPC on Linux with GCC when building with

timestamp profiling (--with-tsc): the preprocessor test for the PowerPC

support now looks for "__powerpc__" as well as "__ppc__": the latter seems to

only be present on OS X; the former is the correct one for Linux with GCC.

- Issue #1099: Fix the build on MacOSX when building a framework with pydebug

using GCC 4.0.

IDLE

----

- Issue #11718: IDLE's open module dialog couldn't find the __init__.py

file in a package.

Tests

-----

- Issue #12205: Fix test_subprocess failure due to uninstalled test data.

- Issue #5723: Improve json tests to be executed with and without accelerations.

- Issue #11910: Fix test_heapq to skip the C tests when _heapq is missing.

- Fix test_startfile to wait for child process to terminate before finishing.

- Issue #11719: Fix message about unexpected test_msilib skip on non-Windows

platforms. Patch by Nadeem Vawda.

- Issue #7108: Fix test_commands to not fail when special attributes ('@'

or '.') appear in 'ls -l' output.

- Issue #11490: test_subprocess:test_leaking_fds_on_error no longer gives a

false positive if the last directory in the path is inaccessible.

- Issue #10822: Fix test_posix:test_getgroups failure under Solaris. Patch

by Ross Lagerwall.

- Issue #6293: Have regrtest.py echo back sys.flags. This is done by default

in whole runs and enabled selectively using ``--header`` when running an

explicit list of tests. Original patch by Collin Winter.

- Issue #775964: test_grp now skips YP/NIS entries instead of failing when

encountering them.

- Issue #7110: regrtest now sends test failure reports and single-failure

tracebacks to stderr rather than stdout.

What's New in Python 2.7.1?

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

*Release date: 2010-11-27*

Library

-------

- Issue #2236: distutils' mkpath ignored the mode parameter.

- Fix typo in one sdist option (medata-check).

- Issue #10323: itertools.islice() now consumes the minimum number of

inputs before stopping. Formerly, the final state of the underlying

iterator was undefined.

- Issue #10565: The collections.Iterator ABC now checks for both

``__iter__`` and ``next``.

- Issue #10092: Properly reset locale in calendar.Locale*Calendar classes.

- Issue #10459: Update CJK character names to Unicode 5.2.

- Issue #6098: Don't claim DOM level 3 conformance in minidom.

- Issue #10561: In pdb, clear the breakpoints by the breakpoint number.

- Issue #5762: Fix AttributeError raised by ``xml.dom.minidom`` when an empty

XML namespace attribute is encountered.

- Issue #1710703: Write structures for an empty ZIP archive when a ZipFile is

created in modes 'a' or 'w' and then closed without adding any files. Raise

BadZipfile (rather than IOError) when opening small non-ZIP files.

- Issue #4493: urllib2 adds '/' in front of path components which does not

start with '/. Common behavior exhibited by browsers and other clients.

- Issue #6378: idle.bat now runs with the appropriate Python version rather than

the system default. Patch by Sridhar Ratnakumar.

- Issue #10407: Fix one NameError in distutils.

- Issue #10198: fix duplicate header written to wave files when writeframes()

is called without data.

- Issue #10467: Fix BytesIO.readinto() after seeking into a position after the

end of the file.

- Issue #5111: IPv6 Host in the Header is wrapped inside [ ]. Patch by Chandru.

Build

-----

- Backport r83399 to allow test_distutils to pass on installed versions.

- Issue #1303434: Generate ZIP file containing all PDBs.

Tests

-----

- Issue #9424: Replace deprecated assert* methods in the Python test suite.

Documentation

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

- Issue #10299: List the built-in functions in a table in functions.rst.

What's New in Python 2.7.1 release candidate 1?

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

*Release date: 2010-11-13*

Core and Builtins

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

- Issue #10221: dict.pop(k) now has a key error message that includes the

missing key (same message d[k] returns for missing keys).

- Issue #10125: Don't segfault when the iterator passed to

``file.writelines()`` closes the file.

- Issue #10186: Fix the SyntaxError caret when the offset is equal to the

length of the offending line.

- Issue #9997: Don't let the name "top" have special significance in scope

resolution.

- Issue #9862: Compensate for broken PIPE_BUF in AIX by hard coding

its value as the default 512 when compiling on AIX.

- Issue #9675: CObject use is marked as a Py3k warning, not a deprecation

warning.

- Issue #10068: Global objects which have reference cycles with their module's

dict are now cleared again. This causes issue #7140 to appear again.

- Issue #9869: Make long() and PyNumber_Long return something of type

long for a class whose __long__ method returns a plain int. This

fixes an interpreter crash when initializing an instance of a long

subclass from an object whose __long__ method returns a plain int.

- Issue #10006: type.__abstractmethods__ now raises an AttributeError.

- Issue #9797: pystate.c wrongly assumed that zero couldn't be a valid

thread-local storage key.

- Issue #4947: The write() method of sys.stdout and sys.stderr uses their

encoding and errors attributes instead of using utf-8 in strict mode, to get

the same behaviour than the print statement.

- Issue #9737: Fix a crash when trying to delete a slice or an item from

a memoryview object.

- Restore GIL in nis_cat in case of error.

- Issue #9688: __basicsize__ and __itemsize__ must be accessed as Py_ssize_t.

- Issue #8530: Prevent stringlib fastsearch from reading beyond the front

of an array.

- Issue #83755: Implicit set-to-frozenset conversion was not thread-safe.

- Issue #9416: Fix some issues with complex formatting where the

output with no type specifier failed to match the str output:

- format(complex(-0.0, 2.0), '-') omitted the real part from the output,

- format(complex(0.0, 2.0), '-') included a sign and parentheses.

- Issue #7616: Fix copying of overlapping memoryview slices with the Intel

compiler.

Library

-------

- Issue #9926: Wrapped TestSuite subclass does not get __call__ executed

- Issue #4471: Properly shutdown socket in IMAP.shutdown(). Patch by

Lorenzo M. Catucci.

- Issue #10126: Fix distutils' test_build when Python was built with

--enable-shared.

- Fix typo in one sdist option (medata-check).

- Issue #9199: Fix incorrect use of distutils.cmd.Command.announce.

- Issue #1718574: Fix options that were supposed to accept arguments but did

not in build_clib.

- Issue #9281: Prevent race condition with mkdir in distutils. Patch by

Arfrever.

- Issue #10229: Fix caching error in gettext.

- Issue #10252: Close file objects in a timely manner in distutils code and

tests. Patch by Brian Brazil, completed by Éric Araujo.

- Issue #10311: The signal module now restores errno before returning from

its low-level signal handler. Patch by Hallvard B Furuseth.

- Issue #10038: json.loads() on str should always return unicode (regression

from Python 2.6). Patch by Walter Dörwald.

- Issue #120176: Wrapped TestSuite subclass does not get __call__ executed.

- Issue #6706: asyncore accept() method no longer raises

EWOULDBLOCK/ECONNABORTED on incomplete connection attempt but returns None

instead.

- Issue #10266: uu.decode didn't close in_file explicitly when it was given

as a filename. Patch by Brian Brazil.

- Issue #10246: uu.encode didn't close file objects explicitly when filenames

were given to it. Patch by Brian Brazil.

- Issue #10253: FileIO leaks a file descriptor when trying to open a file

for append that isn't seekable. Patch by Brian Brazil.

- Issue #6105: json.dumps now respects OrderedDict's iteration order.

- Issue #9295: Fix a crash under Windows when calling close() on a file

object with custom buffering from two threads at once.

- Issue #5027: The standard ``xml`` namespace is now understood by

xml.sax.saxutils.XMLGenerator as being bound to

http://www.w3.org/XML/1998/namespace. Patch by Troy J. Farrell.

- Issue #10163: Skip unreadable registry keys during mimetypes

initialization.

- Issue #5117: Fixed root directory related issue on posixpath.relpath() and

ntpath.relpath().

- Issue #9409: Fix the regex to match all kind of filenames, for interactive

debugging in doctests.

- Issue #6612: Fix site and sysconfig to catch os.getcwd() error, eg. if the

current directory was deleted. Patch written by W. Trevor King.

- Issue #10045: Improved performance when writing after seeking past the

end of the "file" in cStringIO.

- Issue #9948: Fixed problem of losing filename case information.

- Issue #9437: Fix building C extensions with non-default LDFLAGS.

- Issue #9759: GzipFile now raises ValueError when an operation is attempted

after the file is closed. Patch by Jeffrey Finkelstein.

- Issue #9042: Fix interaction of custom translation classes and caching in

gettext.

- Issue #9065: tarfile no longer uses "root" as the default for the uname and

gname field.

- Issue #1050268: parseaddr now correctly quotes double quote and backslash

characters that appear inside quoted strings in email addresses.

- Issue #10004: quoprimime no longer generates a traceback when confronted

with invalid characters after '=' in a Q-encoded word.

- Issue #9950: Fix socket.sendall() crash or misbehaviour when a signal is

received. Now sendall() properly calls signal handlers if necessary,

and retries sending if these returned successfully, including on sockets

with a timeout.

- Issue #9947: logging: Fixed locking bug in stopListening.

- Issue #9945: logging: Fixed locking bugs in addHandler/removeHandler.

- Issue #9936: Fixed executable lines' search in the trace module.

- Issue #9928: Properly initialize the types exported by the bz2 module.

- Issue #9854: The default read() implementation in io.RawIOBase now

handles non-blocking readinto() returning None correctly.

- Issue #9729: Fix the signature of SSLSocket.recvfrom() and

SSLSocket.sendto() to match the corresponding socket methods. Also,

fix various SSLSocket methods to raise socket.error rather than an

unhelpful TypeError when called on an unconnected socket. Original patch

by Andrew Bennetts.

- Issue #9826: OrderedDict.__repr__ can now handle self-referential

values: d['x'] = d.

- Issue #767645: Set os.path.supports_unicode_filenames to True on Mac OS X.

- Issue #9837: The read() method of ZipExtFile objects (as returned by

ZipFile.open()) could return more bytes than requested.

- Issue #9825: removed __del__ from the definition of collections.OrderedDict.

This prevents user-created self-referencing ordered dictionaries from

becoming permanently uncollectable GC garbage. The downside is that

removing __del__ means that the internal doubly-linked list has to wait for

GC collection rather than freeing memory immediately when the refcnt drops

to zero.

- Issue #9816: random.Random.jumpahead(n) did not produce a sufficiently

different internal state for small values of n. Fixed by salting the

value.

- Issue #9792: In case of connection failure, socket.create_connection()

would swallow the exception and raise a new one, making it impossible

to fetch the original errno, or to filter timeout errors. Now the

original error is re-raised.

- Issue #9758: When fcntl.ioctl() was called with mutable_flag set to True,

and the passed buffer was exactly 1024 bytes long, the buffer wouldn't

be updated back after the system call. Original patch by Brian Brazil.

- Issue #1100562: Fix deep-copying of objects derived from the list and

dict types. Patch by Michele Orrù and Björn Lindqvist.

- Issue #7005: Fixed output of None values for RawConfigParser.write and

ConfigParser.write.

- Issue #808164: Fixed socket.close to avoid references to globals, to

avoid issues when socket.close is called from a __del__ method.

- Issue #2986: difflib.SequenceMatcher gets a new parameter, autojunk, which

can be set to False to turn off the previously undocumented 'popularity'

heuristic. Patch by Terry Reedy and Eli Bendersky

- Issue #8797: urllib2 does a retry for Basic Authentication failure instead of

falling into recursion.

- Issue #1194222: email.utils.parsedate now returns RFC2822 compliant four

character years even if the message contains RFC822 two character years.

- Issue #8750: Fixed MutableSet's methods to correctly handle

reflexive operations, namely x -= x and x ^= x.

- Issue #9129: smtpd.py is vulnerable to DoS attacks deriving from missing

error handling when accepting a new connection.

- Issue #658749: asyncore's connect() method now correctly interprets winsock

errors.

- Issue #9501: Fixed logging regressions in cleanup code.

- Issue #9214: Set operations on KeysView or ItemsView in the collections

module now correctly return a set. (Patch by Eli Bendersky.)

- Issue #9617: Signals received during a low-level write operation aren't

ignored by the buffered IO layer anymore.

- Issue #2521: Use weakrefs on for caching in the abc module, so that classes

are not held onto after they are deleted elsewhere.

- Issue #9626: the view methods for collections.OrderedDict() were returning

the unordered versions inherited from dict. Those methods are now

overridden to provide ordered views.

- Issue #8688: MANIFEST files created by distutils now include a magic

comment indicating they are generated. Manually maintained MANIFESTs

without this marker will not be overwritten or removed.

- Issue #7467: when reading a file from a ZIP archive, its CRC is checked

and a BadZipfile error is raised if it doesn't match (as used to be the

case in Python 2.5 and earlier).

- Issue #9550: a BufferedReader could issue an additional read when the

original read request had been satisfied, which could block indefinitely

when the underlying raw IO channel was e.g. a socket. Report and original

patch by Jason V. Miller.

- Issue #9551: Don't raise TypeError when setting the value to None for

SafeConfigParser instances constructed with allow_no_value == True.

- Issue #6915: Under Windows, os.listdir() didn't release the Global

Interpreter Lock around all system calls. Original patch by Ryan Kelly.

- Issue #3757: thread-local objects now support cyclic garbage collection.

Thread-local objects involved in reference cycles will be deallocated

timely by the cyclic GC, even if the underlying thread is still running.

- Issue #6231: Fix xml.etree.ElementInclude to include the tail of the

current node.

- Issue #6869: Fix a refcount problem in the _ctypes extension.

- Issue5504 - ctypes should now work with systems where mmap can't be

PROT_WRITE and PROT_EXEC.

- Fix Issue8280 - urllib2's Request method will remove fragements in the url.

This is how it is supposed to work, wget and curl do the same. Previous

behavior was wrong.

- Issue #2944: asyncore doesn't handle connection refused correctly.

- Issue #3196: email header decoding is now forgiving if an RFC2047

encoded word encoded in base64 is lacking padding.

- Issue #9444: Argparse now uses the first element of prefix_chars as

the option character for the added 'h/help' option if prefix_chars

does not contain a '-', instead of raising an error.

- Issue #9354: Provide getsockopt() in asyncore's file_wrapper.

- Issue #9428: Fix running scripts with the profile/cProfile modules from

the command line.

- Issue #7781: Fix restricting stats by entry counts in the pstats

interactive browser.

- Issue #9209: Do not crash in the pstats interactive browser on invalid

regular expressions.

- Issue #7372: Fix pstats regression when stripping paths from profile

data generated with the profile module.

- Issue #4108: In urllib.robotparser, if there are multiple 'User-agent: *'

entries, consider the first one.

- Issue #8397: Raise an error when attempting to mix iteration and regular

reads on a BZ2File object, rather than returning incorrect results.

- Issue #5294: Fix the behavior of pdb's "continue" command when called

in the top-level debugged frame.

- Issue #5727: Restore the ability to use readline when calling into pdb

in doctests.

- Issue #6719: In pdb, do not stop somewhere in the encodings machinery

if the source file to be debugged is in a non-builtin encoding.

- Issue #8048: Prevent doctests from failing when sys.displayhook has

been reassigned.

- Issue #8015: In pdb, do not crash when an empty line is entered as

a breakpoint command.

- Issue #9448: Fix a leak of OS resources (mutexes or semaphores) when

re-initializing a buffered IO object by calling its ``__init__`` method.

- Issue #7909: Do not touch paths with the special prefixes ``\\.\``

or ``\\?\`` in ntpath.normpath().

- Issue #5146: Handle UID THREAD command correctly in imaplib.

- Issue #5147: Fix the header generated for cookie files written by

http.cookiejar.MozillaCookieJar.

- Issue #8198: In pydoc, output all help text to the correct stream

when sys.stdout is reassigned.

- Issue #7395: Fix tracebacks in pstats interactive browser.

- Issue #8230: Fix Lib/test/sortperf.py.

- Issue #1713: Fix os.path.ismount(), which returned true for symbolic links

across devices.

- Issue #8826: Properly load old-style "expires" attribute in http.cookies.

- Issue #1690103: Fix initial namespace for code run with trace.main().

- Issue #8471: In doctest, properly reset the output stream to an empty

string when Unicode was previously output.

- Issue #8620: when a Cmd is fed input that reaches EOF without a final

newline, it no longer truncates the last character of the last command line.

- Issue #6213: Implement getstate() and setstate() methods of utf-8-sig and

utf-16 incremental encoders.

- Issue #7113: Speed up loading in ConfigParser. Patch by Łukasz Langa.

- Issue #3704: cookielib was not properly handling URLs with a / in the

parameters.

- Issue #9032: XML-RPC client retries the request on EPIPE error. The EPIPE

error occurs when the server closes the socket and the client sends a big

XML-RPC request.

- Issue #5542: Remove special logic that closes HTTPConnection socket on EPIPE.

- Issue #4629: getopt raises an error if an argument ends with = whereas getopt

doesn't except a value (eg. --help= is rejected if getopt uses ['help='] long

options).

- Issue #7895: platform.mac_ver() no longer crashes after calling os.fork()

- Issue #5395: array.fromfile() would raise a spurious EOFError when an

I/O error occurred. Now an IOError is raised instead. Patch by chuck

(Jan Hosang).

- Issue #7646: The fnmatch pattern cache no longer grows without bound.

- Issue #9136: Fix 'dictionary changed size during iteration'

RuntimeError produced when profiling the decimal module. This was

due to a dangerous iteration over 'locals()' in Context.__init__.

- Fix extreme speed issue in Decimal.pow when the base is an exact

power of 10 and the exponent is tiny (for example,

Decimal(10) ** Decimal('1e-999999999')).

- Issue #9161: Fix regression in optparse's acceptance of unicode

strings in add_option calls.