+++++++++++

Python News

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What's New in Python 3.3.4 release candidate 1?

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

*Not yet released, see sections below for changes released in 3.3.3*

Core and Builtins

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

- Issue #19729: In str.format(), fix recursive expansion in format spec.

- Issue #19638: Fix possible crash / undefined behaviour from huge (more than 2

billion characters) input strings in _Py_dg_strtod.

Library

-------

- Issue #19839: Fix regression in bz2 module's handling of non-bzip2 data at

EOF, and analogous bug in lzma module.

- Issue #19138: doctest's IGNORE_EXCEPTION_DETAIL now allows a match when

no exception detail exists (no colon following the exception's name, or

a colon does follow but no text follows the colon).

- Issue #19834: Support unpickling of exceptions pickled by Python 2.

- Issue #15798: Fixed subprocess.Popen() to no longer fail if file

descriptor 0, 1 or 2 is closed.

- Issue #19088: Fixed incorrect caching of the copyreg module in

object.__reduce__() and object.__reduce_ex__().

- Fixed _pickle.Unpickler to not fail when loading empty strings as

persistent IDs.

- Issue #11480: Fixed copy.copy to work with classes with custom metaclasses.

Patch by Daniel Urban.

- Issue #6477: Added support for pickling the types of built-in singletons

(i.e., Ellipsis, NotImplemented, None).

- Issue #11508: Fixed uuid.getnode() and uuid.uuid1() on environment with

virtual interface. Original patch by Kent Frazier.

- Issue #11489: JSON decoder now accepts lone surrogates.

- Issue #19545: Avoid chained exceptions while passing stray % to

time.strptime(). Initial patch by Claudiu Popa.

- Issue #19633: Fixed writing not compressed 16- and 32-bit wave files on

big-endian platforms.

- Issue #19449: in csv's writerow, handle non-string keys when generating the

error message that certain keys are not in the 'fieldnames' list.

- Fix test.support.bind_port() to not cause an error when Python was compiled

on a system with SO_REUSEPORT defined in the headers but run on a system

with an OS kernel that does not support that reasonably new socket option.

- Fix compilation error under gcc of the ctypes module bundled libffi for arm.

- Issue #19523: Closed FileHandler leak which occurred when delay was set.

- Issue #13674: Prevented time.strftime from crashing on Windows when given

a year before 1900 and a format of %y.

- Issue #19544 and Issue #6286: Restore use of urllib over http allowing use

of http_proxy for Distutils upload command, a feature accidentally lost

in the rollback of distutils2.

- Issue #19544 and Issue #7457: Restore the read_pkg_file method to

distutils.dist.DistributionMetadata accidentally removed in the undo of

distutils2.

- Issue #1575020: Fixed support of 24-bit wave files on big-endian platforms.

- Issue #19480: HTMLParser now accepts all valid start-tag names as defined

by the HTML5 standard.

- Issue #6157: Fixed tkinter.Text.debug(). Original patch by Guilherme Polo.

- Issue #6160: The bbox() method of tkinter.Spinbox now returns a tuple of

integers instead of a string. Based on patch by Guilherme Polo.

- Issue #10197: Rework subprocess.get[status]output to use subprocess

functionality and thus to work on Windows. Patch by Nick Coghlan.

- Issue #19286: Directories in ``package_data`` are no longer added to

the filelist, preventing failure outlined in the ticket.

Tests

-----

- Issue #19595: Re-enabled a long-disabled test in test_winsound.

- Issue #19588: Fixed tests in test_random that were silently skipped most

of the time. Patch by Julian Gindi.

- Issue #19596: Set untestable tests in test_importlib to None to avoid

reporting success on empty tests.

- Issue #19440: Clean up test_capi by removing an unnecessary __future__

import, converting from test_main to unittest.main, and running the

_testcapi module tests within a unittest TestCase.

- Issue #18702: All skipped tests now reported as skipped.

- Issue #19085: Added basic tests for all tkinter widget options.

Documentation

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

- Issue #18840: Introduce the json module in the tutorial, and deemphasize

the pickle module.

- Issue #19845: Updated the Compiling Python on Windows section.

- Issue #19795: Improved markup of True/False constants.

- Issue #18326: Clarify that list.sort's arguments are keyword-only. Also,

attempt to reduce confusion in the glossary by not saying there are

different "types" of arguments and parameters.

Build

-----

- Issue #19788: kill_python(_d).exe is now run as a PreBuildEvent on the

pythoncore sub-project. This should prevent build errors due a previous

build's python(_d).exe still running.

- Add workaround for VS 2010 nmake clean issue. VS 2010 doesn't set up PATH

for nmake.exe correctly.

What's New in Python 3.3.3?

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

*Release date: 17-Nov-2013*

No changes from release candidate 2.

What's New in Python 3.3.3 release candidate 2?

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

*Release date: 11-Nov-2013*

Library

-------

- Issue #19227: Any re-seeding of the OpenSSL RNG on fork has been removed;

this should be handled by OpenSSL itself or by the application.

- Issue #19435: Fix directory traversal attack on CGIHttpRequestHandler.

Tests

-----

- Issue #18964: Fix test_tcl when run with Tcl/Tk versions < 8.5.

Build

-----

- Issue #15663: Revert OS X installer built-in Tcl/Tk support for 3.3.3.

Some third-party projects, such as Matplotlib and PIL/Pillow,

depended on being able to build with Tcl and Tk frameworks in

/Library/Frameworks.

What's New in Python 3.3.3 release candidate 1?

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

*Release date: 27-Oct-2013*

Core and Builtins

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

- Issue #18603: Ensure that PyOS_mystricmp and PyOS_mystrnicmp are in the

Python executable and not removed by the linker's optimizer.

- Issue #19279: UTF-7 decoder no more produces illegal strings.

- Fix macro expansion of _PyErr_OCCURRED(), and make sure to use it in at

least one place so as to avoid regressions.

- Issue #19014: memoryview.cast() is now allowed on zero-length views.

- Issue #19098: Prevent overflow in the compiler when the recursion limit is set

absurdly high.

- Issue #18942: sys._debugmallocstats() output was damaged on Windows.

- Issue #18667: Add missing "HAVE_FCHOWNAT" symbol to posix._have_functions.

- Issue #18368: PyOS_StdioReadline() no longer leaks memory when realloc()

fails.

- Issue #16741: Fix an error reporting in int().

- Issue #17899: Fix rare file descriptor leak in os.listdir().

- Issue #18552: Check return value of PyArena_AddPyObject() in

obj2ast_object().

- Issue #18560: Fix potential NULL pointer dereference in sum().

- Issue #15905: Fix theoretical buffer overflow in handling of sys.argv[0],

prefix and exec_prefix if the operation system does not obey MAXPATHLEN.

- Issue #18344: Fix potential ref-leaks in _bufferedreader_read_all().

- Issue #17872: Fix a segfault in marshal.load() when input stream returns

more bytes than requested.

- Issue #18426: Fix NULL pointer dereference in C extension import when

PyModule_GetDef() returns an error.

- Issue #18328: Reorder ops in PyThreadState_Delete*() functions. Now the

tstate is first removed from TLS and then deallocated.

- Issue #18184: PyUnicode_FromFormat() and PyUnicode_FromFormatV() now raise

OverflowError when an argument of %c format is out of range.

- Issue #18137: Detect integer overflow on precision in float.__format__()

and complex.__format__().

- Issue #18183: Fix various unicode operations on strings with large unicode

codepoints.

- Issue #18180: Fix ref leak in _PyImport_GetDynLoadWindows().

- Issue #18038: SyntaxError raised during compilation sources with illegal

encoding now always contains an encoding name.

- Issue #17644: Fix a crash in str.format when curly braces are used in square

brackets.

- Issue #17983: Raise a SyntaxError for a ``global __class__`` statement in a

class body.

- Issue #17927: Frame objects kept arguments alive if they had been copied into

a cell, even if the cell was cleared.

Library

-------

- Issue #19395: Raise an exception when attempting to pickle a bz2 or lzma

compressor/decompressor object, rather than creating a pickle that would

cause a segfault when loaded and used.

- Issue #19227: Try to fix deadlocks caused by re-seeding then OpenSSL

pseudo-random number generator on fork().

- Issue #16037: HTTPMessage.readheaders() raises an HTTPException when more than

100 headers are read. Adapted from patch by Jyrki Pulliainen.

- Issue #16040: CVE-2013-1752: nntplib: Limit maximum line lengths to 2048 to

prevent readline() calls from consuming too much memory. Patch by Jyrki

Pulliainen.

- Issue #16041: CVE-2013-1752: poplib: Limit maximum line lengths to 2048 to

prevent readline() calls from consuming too much memory. Patch by Jyrki

Pulliainen.

- Issue #17997: Change behavior of ``ssl.match_hostname()`` to follow RFC 6125,

for security reasons. It now doesn't match multiple wildcards nor wildcards

inside IDN fragments.

- Issue #16039: CVE-2013-1752: Change use of readline in imaplib module to limit

line length. Patch by Emil Lind.

- Issue #19393: Fix symtable.symtable function to not be confused when there are

functions or classes named "top".

- Issue #19339: telnetlib module is now using time.monotonic() when available

to compute timeout.

- Issue #19288: Fixed the "in" operator of dbm.gnu databases for string

argument. Original patch by Arfrever Frehtes Taifersar Arahesis.

- Issue #19287: Fixed the "in" operator of dbm.ndbm databases for string

argument. Original patch by Arfrever Frehtes Taifersar Arahesis.

- Issue #19327: Fixed the working of regular expressions with too big charset.

- Issue #19350: Increasing the test coverage of macurl2path. Patch by Colin

Williams.

- Issue #19352: Fix unittest discovery when a module can be reached

through several paths (e.g. under Debian/Ubuntu with virtualenv).

- Issue #15207: Fix mimetypes to read from correct part of Windows registry

Original patch by Dave Chambers

- Issue #8964: fix platform._sys_version to handle IronPython 2.6+.

Patch by Martin Matusiak.

- Issue #16038: CVE-2013-1752: ftplib: Limit amount of data read by

limiting the call to readline(). Original patch by Michał

Jastrzębski and Giampaolo Rodola.

- Issue #18235: Fix the sysconfig variables LDSHARED and BLDSHARED under AIX.

Patch by David Edelsohn.

- Issue #19276: Fixed the wave module on 64-bit big-endian platforms.

- Issue #18776: atexit callbacks now display their full traceback when they

raise an exception.

- Issue #17827: Add the missing documentation for ``codecs.encode`` and

``codecs.decode``.

- Issue #18458: Prevent crashes with newer versions of libedit. Its readline

emulation has changed from 0-based indexing to 1-based like gnu readline.

Original patch by Ronald Oussoren.

- Issue #18919: If the close() method of a writer in the sunau or wave module

failed, second invocation of close() and destructor no more raise an

exception.

- Issue #19131: The aifc module now correctly reads and writes sampwidth of

compressed streams.

- Issue #19158: a rare race in BoundedSemaphore could allow .release() too

often.

- Issue #18037: 2to3 now escapes '\u' and '\U' in native strings.

- Issue #19137: The pprint module now correctly formats instances of set and

frozenset subclasses.

- Issue #19092: contextlib.ExitStack now correctly reraises exceptions

from the __exit__ callbacks of inner context managers (Patch by Hrvoje

Nikšić)

- Issue #12641: Avoid passing "-mno-cygwin" to the mingw32 compiler, except

when necessary. Patch by Oscar Benjamin.

- Issue #18594: The fast path for collections.Counter() was never taken

due to an over-restrictive type check. And the fallback path did

not implement the same algorithm as the pure python code.

- Properly initialize all fields of a SSL object after allocation.

- Issue #4366: Fix building extensions on all platforms when --enable-shared

is used.

- Issue #18950: Fix miscellaneous bugs in the sunau module.

Au_read.readframes() now updates current file position and reads correct

number of frames from multichannel stream. Au_write.writeframesraw() now

correctly updates current file position. Au_read.getnframes() now returns an

integer (as in Python 2). Au_read and Au_write now correctly works with file

object if start file position is not a zero.

- Issue #19053: ZipExtFile.read1() with non-zero argument no more returns empty

bytes until end of data.

- Issue #19028: Fixed tkinter.Tkapp.merge() for non-string arguments.

- Issue #3015: Fixed tkinter with wantobject=False. Any Tcl command call

returned empty string.

- Issue #18050: Fixed an incompatibility of the re module with Python 3.3.0

binaries.

- Issue #19037: The mailbox module now makes all changes to maildir files

before moving them into place, to avoid race conditions with other programs

that may be accessing the maildir directory.

- Issue #14984: On POSIX systems, when netrc is called without a filename

argument (and therefore is reading the user's $HOME/.netrc file), it now

enforces the same security rules as typical ftp clients: the .netrc file must

be owned by the user that owns the process and must not be readable by any

other user.

- Issue #18873: The tokenize module now detects Python source code encoding

only in comment lines.

- Issue #17324: Fix http.server's request handling case on trailing '/'. Patch

contributed by Vajrasky Kok.

- Issue #19018: The heapq.merge() function no longer suppresses IndexError

in the underlying iterables.

- Issue #18784: The uuid module no more attempts to load libc via ctypes.CDLL,

if all necessary functions are already found in libuuid.

Patch by Evgeny Sologubov.

- Issue #18672: Fixed format specifiers for Py_ssize_t in debugging output in

the _sre module.

- Issue #18830: inspect.getclasstree() no more produces duplicated entries even

when input list contains duplicates.

- Issue #18909: Fix _tkinter.tkapp.interpaddr() on Windows 64-bit, don't cast

64-bit pointer to long (32 bits).

- Issue #18876: The FileIO.mode attribute now better reflects the actual mode

under which the file was opened. Patch by Erik Bray.

- Issue #18418: After fork(), reinit all threads states, not only active ones.

Patch by A. Jesse Jiryu Davis.

- Issue #16611: http.cookie now correctly parses the 'secure' and 'httponly'

cookie flags.

- Issue #11973: Fix a problem in kevent. The flags and fflags fields are now

properly handled as unsigned.

- Issue #17702: On error, os.environb now removes suppress the except context

when raising a new KeyError with the original key.

- Issue #18755: Fixed the loader used in imp to allow get_data() to be called

multiple times.

- Issue #16809: Fixed some tkinter incompabilities with Tcl/Tk 8.6.

- Issue #16809: Tkinter's splitlist() and split() methods now accept Tcl_Obj

argument.

- Issue #18324: set_payload now correctly handles binary input. This also

supersedes the previous fixes for #14360, #1717, and #16564.

- Issue #17119: Fixed integer overflows when processing large strings and tuples

in the tkinter module.

- Issue #18747: Re-seed OpenSSL's pseudo-random number generator after fork.

A pthread_atfork() parent handler is used to seed the PRNG with pid, time

and some stack data.

- Issue #8865: Concurrent invocation of select.poll.poll() now raises a

RuntimeError exception. Patch by Christian Schubert.

- Issue #13461: Fix a crash in the TextIOWrapper.tell method on 64-bit

platforms. Patch by Yogesh Chaudhari.

- Issue #18777: The ssl module now uses the new CRYPTO_THREADID API of

OpenSSL 1.0.0+ instead of the deprecated CRYPTO id callback function.

- Issue #18768: Correct doc string of RAND_edg(). Patch by Vajrasky Kok.

- Issue #18178: Fix ctypes on BSD. dlmalloc.c was compiled twice which broke

malloc weak symbols.

- Issue #18709: Fix CVE-2013-4238. The SSL module now handles NULL bytes

inside subjectAltName correctly. Formerly the module has used OpenSSL's

GENERAL_NAME_print() function to get the string represention of ASN.1

strings for ``rfc822Name`` (email), ``dNSName`` (DNS) and

``uniformResourceIdentifier`` (URI).

- Issue #18756: Improve error reporting in os.urandom() when the failure

is due to something else than /dev/urandom not existing (for example,

exhausting the file descriptor limit).

- Issue #18405: Improve the entropy of crypt.mksalt().

- Issue #19151: Fix docstring and use of _get_supported_file_loaders() to

reflect 2-tuples.

- Issue #18676: Change 'positive' to 'non-negative' in queue.py put and get

docstrings and ValueError messages. Patch by Zhongyue Luo

- Issue #18681: Fix a NameError in imp.reload() (noticed by Weizhao Li).

- Issue #8112: xlmrpc.server's DocXMLRPCServer server no longer raises an error

if methods have annotations; it now correctly displays the annotations.

- Issue #17998: Fix an internal error in regular expression engine.

- Issue #17557: Fix os.getgroups() to work with the modified behavior of

getgroups(2) on OS X 10.8. Original patch by Mateusz Lenik.

- Issue #18599: Fix name attribute of _sha1.sha1() object. It now returns

'SHA1' instead of 'SHA'.

- Issue #18561: Skip name in ctypes' _build_callargs() if name is NULL.

- Issue #18559: Fix NULL pointer dereference error in _pickle module

- Issue #18556: Check the return value of a PyUnicode_AsWideChar() call in

ctypes' U_set().

- Issue #18549: Eliminate dead code in socket_ntohl()

- Issue #18514: Fix unreachable Py_DECREF() call in PyCData_FromBaseObj()

- Issue #18513: Fix behaviour of cmath.rect w.r.t. signed zeros on OS X 10.8 +

gcc.

- Issue #18480: Add missing call to PyType_Ready to the _elementtree extension.

- Issue #17778: Fix test discovery for test_multiprocessing. (Patch by

Zachary Ware.)

- Issue #18431: The new email header parser now decodes RFC2047 encoded words

in structured headers.

- Issue #18432: The sched module's queue method was incorrectly returning

an iterator instead of a list.

- Issue #18044: The new email header parser was mis-parsing encoded words where

an encoded character immediately followed the '?' that follows the CTE

character, resulting in a decoding failure. They are now decoded correctly.

- Issue #18101: Tcl.split() now process strings nested in a tuple as it

do with byte strings.

- Issue #17198: Fix a NameError in the dbm module. Patch by Valentina

Mukhamedzhanova.

- Issue #18013: Fix cgi.FieldStorage to parse the W3C sample form.

- Issue #18347: ElementTree's html serializer now preserves the case of

closing tags.

- Issue #17261: Ensure multiprocessing's proxies use proper address.

- Issue #18343: faulthandler.register() now keeps the previous signal handler

when the function is called twice, so faulthandler.unregister() restores

correctly the original signal handler.

- Issue #17097: Make multiprocessing ignore EINTR.

- Issue #18339: Negative ints keys in unpickler.memo dict no longer cause a

segfault inside the _pickle C extension.

- Issue #18224: Removed pydoc script from created venv, as it causes problems

on Windows and adds no value over and above python -m pydoc ...

- Issue #18155: The csv module now correctly handles csv files that use

a delimter character that has a special meaning in regexes, instead of

throwing an exception.

- Issue #14360: encode_quopri can now be successfully used as an encoder

when constructing a MIMEApplication object.

- Issue #18135: ssl.SSLSocket.write() now raises an OverflowError if the input

string in longer than 2 gigabytes, and ssl.SSLContext.load_cert_chain()

raises a ValueError if the password is longer than 2 gigabytes. The ssl

module does not support partial write.

- Issue #18248: Fix libffi build on AIX.

- Issue #18259: Declare sethostname in socketmodule.c for AIX

- Issue #18167: cgi.FieldStorage no longer fails to handle multipart/form-data

when \r\n appears at end of 65535 bytes without other newlines.

- subprocess: Prevent a possible double close of parent pipe fds when the

subprocess exec runs into an error. Prevent a regular multi-close of the

/dev/null fd when any of stdin, stdout and stderr was set to DEVNULL.

- Issue #16102: Make uuid._netbios_getnode() work again on Python 3.

- Issue #18109: os.uname() now decodes fields from the locale encoding, and

socket.gethostname() now decodes the hostname from the locale encoding,

instead of using the UTF-8 encoding in strict mode.

- Issue #17403: urllib.parse.robotparser normalizes the urls before adding to

ruleline. This helps in handling certain types invalid urls in a conservative

manner.

- Issue #18025: Fixed a segfault in io.BufferedIOBase.readinto() when raw

stream's read() returns more bytes than requested.

- Issue #18011: base64.b32decode() now raises a binascii.Error if there are

non-alphabet characters present in the input string to conform a docstring.

Updated the module documentation.

- Issue #13772: Restored directory detection of targets in ``os.symlink`` on

Windows, which was temporarily removed in Python 3.2.3 due to an incomplete

implementation. The implementation now works even if the symlink is created

in a location other than the current directory.

- Issue #16986: ElementTree now correctly parses a string input not only when

an internal XML encoding is UTF-8 or US-ASCII.

- Issue #17812: Fixed quadratic complexity of base64.b32encode().

- Issue #17980: Fix possible abuse of ssl.match_hostname() for denial of

service using certificates with many wildcards (CVE-2013-2099).

- Issue #17981: Closed socket on error in SysLogHandler.

- Fix typos in the multiprocessing module.

- Issue #17754: Make ctypes.util.find_library() independent of the locale.

- Issue #17968: Fix memory leak in os.listxattr().

- Issue #17269: Workaround for socket.getaddrinfo crash on MacOS X

with port None or "0" and flags AI_NUMERICSERV.

- Issue #18698: Ensure imp.reload() returns the module out of sys.modules.

- Issue #18080: When building a C extension module on OS X, if the compiler

is overriden with the CC environment variable, use the new compiler as

the default for linking if LDSHARED is not also overriden. This restores

Distutils behavior introduced in 3.2.3 and inadvertently dropped in 3.3.0.

- Issue #18113: Fixed a refcount leak in the curses.panel module's

set_userptr() method. Reported by Atsuo Ishimoto.

- Issue #18849: Fixed a Windows-specific tempfile bug where collision with an

existing directory caused mkstemp and related APIs to fail instead of

retrying. Report and fix by Vlad Shcherbina.

- Issue #19400: Prevent extension module build failures with Xcode 5 on OS X

10.8+ when using a universal Python that included a PPC architecture,

such as with a python.org 32-bit-only binary installer.

C API

-----

- Issue #18351: Fix various issues with a helper function in importlib used

by PyImport_ExecCodeModuleWithPathnames() (and thus by extension

PyImport_ExecCodeModule() and PyImport_ExecCodeModuleEx()).

IDLE

----

- Issue #18873: IDLE now detects Python source code encoding only in comment

lines.

- Issue #18988: The "Tab" key now works when a word is already autocompleted.

- Issue #18489: Add tests for SearchEngine. Original patch by Phil Webster.

- Issue #18429: Format / Format Paragraph, now works when comment blocks

are selected. As with text blocks, this works best when the selection

only includes complete lines.

- Issue #18226: Add docstrings and unittests for FormatParagraph.py.

Original patches by Todd Rovito and Phil Webster.

- Issue #18279: Format - Strip trailing whitespace no longer marks a file as

changed when it has not been changed. This fix followed the addition of a

test file originally written by Phil Webster (the issue's main goal).

- Issue #7136: In the Idle File menu, "New Window" is renamed "New File".

Patch by Tal Einat, Roget Serwy, and Todd Rovito.

- Remove dead imports of imp.

- Issue #18196: Avoid displaying spurious SystemExit tracebacks.

- Issue #5492: Avoid traceback when exiting IDLE caused by a race condition.

- Issue #17511: Keep IDLE find dialog open after clicking "Find Next".

Original patch by Sarah K.

- Issue #18055: Move IDLE off of imp and on to importlib.

- Issue #15392: Create a unittest framework for IDLE.

Initial patch by Rajagopalasarma Jayakrishnan.

See Lib/idlelib/idle_test/README.txt for how to run Idle tests.

- Issue #14146: Highlight source line while debugging on Windows.

- Issue #17532: Always include Options menu for IDLE on OS X.

Patch by Guilherme Simões.

Tests

-----

- Issue #14407: Fix unittest test discovery in test_concurrent_futures.

- Issue #18919: Unified and extended tests for audio modules: aifc, sunau and

wave.

- Issue #18952: Fix regression in support data downloads introduced when

test.support was converted to a package. Regression noticed by Zachary

Ware.

- Issue #12037: Fix test_email for desktop Windows.

- Issue #15507: test_subprocess's test_send_signal could fail if the test

runner were run in an environment where the process inherited an ignore

setting for SIGINT. Restore the SIGINT handler to the desired

KeyboardInterrupt raising one during that test.

- Issue #18792: Use "127.0.0.1" or "::1" instead of "localhost" as much as

possible, since "localhost" goes through a DNS lookup under recent Windows

versions.

- Issue #1666318: Add a test that shutil.copytree() retains directory

permissions. Patch by Catherine Devlin.

- Issue #18357: add tests for dictview set difference.

Patch by Fraser Tweedale.

- Issue #18273: move the tests in Lib/test/json_tests to Lib/test/test_json

and make them discoverable by unittest. Patch by Zachary Ware.

- Fix a fcntl test case on KFreeBSD, Debian #708653 (Petr Salinger).

- Issue #18396: Fix spurious test failure in test_signal on Windows when

faulthandler is enabled (Patch by Jeremy Kloth)

- Issue #17046: Fix broken test_executable_without_cwd in test_subprocess.

- Issue #15415: Add new temp_dir() and change_cwd() context managers to

test.support, and refactor temp_cwd() to use them. Patch by Chris Jerdonek.

- Issue #15494: test.support is now a package rather than a module (Initial

patch by Indra Talip)

- Issue #17944: test_zipfile now discoverable and uses subclassing to

generate tests for different compression types. Fixed a bug with skipping

some tests due to use of exhausted iterators.

- Issue #18266: test_largefile now works with unittest test discovery and

supports running only selected tests. Patch by Zachary Ware.

- Issue #17767: test_locale now works with unittest test discovery.

Original patch by Zachary Ware.

- Issue #18375: Assume --randomize when --randseed is used for running the

testsuite.

- Issue #11185: Fix test_wait4 under AIX. Patch by Sébastien Sablé.

- Issue #17691: test_univnewlines now works with unittest test discovery.

Patch by Zachary Ware.

- Issue #18094: test_uuid no more reports skipped tests as passed.

- Issue #11995: test_pydoc doesn't import all sys.path modules anymore.

Documentation

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

- Issue #19392: Document that `imp.reload()` now also requires `__loader__` to

be set on the module being reloaded.

- Issue #18758: Fixed and improved cross-references.

- Issue #18743: Fix references to non-existant "StringIO" module.

- Issue #18783: Removed existing mentions of Python long type in docstrings,

error messages and comments.

- Issue #17701: Improving strftime documentation.

- Issue #18440: Clarify that `hash()` can truncate the value returned from an

object's custom `__hash__()` method.

- Issue #17953: Mention that you shouldn't replace sys.modules and deleting key

items will cause Python to not be happy.

- Issue #17844: Add links to encoders and decoders for bytes-to-bytes codecs.

- Issue #14097: improve the "introduction" page of the tutorial.

- Issue #17977: The documentation for the cadefault argument's default value

in urllib.request.urlopen() is fixed to match the code.

Tools/Demos

-----------

- Issue #18873: 2to3 and the findnocoding.py script now detect Python source

code encoding only in comment lines.

- Issue #18817: Fix a resource warning in Lib/aifc.py demo.

- Issue #18439: Make patchcheck work on Windows for ACKS, NEWS.

- Issue #18448: Fix a typo in Tools/demo/eiffel.py.

- Issue #18457: Fixed saving of formulas and complex numbers in

Tools/demo/ss1.py.

- Issue #18449: Make Tools/demo/ss1.py work again on Python 3. Patch by

Févry Thibault.

- Issue #15239: Make mkstringprep.py work again on Python 3.

- Issue #12990: The "Python Launcher" on OSX could not launch python scripts

that have paths that include wide characters.

Build

-----

- Issue #19356: Avoid using a C variabled named "_self", it's a reserved

word in some C compilers.

- Issue #19130: Correct PCbuild/readme.txt, Python 3.3 and 3.4 require VS 2010.

- Issue #16067: Add description into MSI file to replace installer's temporary name.

- Issue #18256: Compilation fix for recent AIX releases. Patch by

David Edelsohn.

- Issue #15172: Document NASM 2.10+ as requirement for building OpenSSL 1.0.1

on Windows.

- Issue #1584: Provide options to override default search paths for

Tcl and Tk when building _tkinter.

- Issue #15663: Tcl/Tk 8.5.15 is now included with the OS X 10.6+

64-bit/32-bit installer for 10.6+. It is no longer necessary

to install a third-party version of Tcl/Tk 8.5 to work around the

problems in the Apple-supplied Tcl/Tk 8.5 shipped in OS X 10.6

and later releases.

- Issue #19019: Change the OS X installer build script to use CFLAGS instead

of OPT for special build options. By setting OPT, some compiler-specific

options like -fwrapv were overridden and thus not used, which could result

in broken interpreters when building with clang.

What's New in Python 3.3.2?

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

*Release date: 13-May-2013*

Core and Builtins

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

- Issue #17237: Fix crash in the ASCII decoder on m68k.

- Issue #17408: Avoid using an obsolete instance of the copyreg module when

the interpreter is shutdown and then started again.

- Issue #17863: In the interactive console, don't loop forever if the encoding

can't be fetched from stdin.

- Issue #17867: Raise an ImportError if __import__ is not found in __builtins__.

- Issue #17857: Prevent build failures with pre-3.5.0 versions of sqlite3,

such as was shipped with Centos 5 and Mac OS X 10.4.

- Issue #17413: sys.settrace callbacks were being passed a string instead of an

exception instance for the 'value' element of the arg tuple if the exception

originated from C code; now an exception instance is always provided.

- Issue #17782: Fix undefined behaviour on platforms where

``struct timespec``'s "tv_nsec" member is not a C long.

- Issue #17715: Fix segmentation fault from raising an exception in a __trunc__

method.

- Issue #16447: Fixed potential segmentation fault when setting __name__ on a

class.

- Issue #17669: Fix crash involving finalization of generators using yield from.

- Issue #17619: Make input() check for Ctrl-C correctly on Windows.

- Issue #17610: Don't rely on non-standard behavior of the C qsort() function.

- Issue #17357: Add missing verbosity output when using -v/-vv.

Library

-------

- Issue #17606: Fixed support of encoded byte strings in the XMLGenerator

characters() and ignorableWhitespace() methods. Original patch by Sebastian

Ortiz Vasquez.

- Issue #17732: Ignore distutils.cfg options pertaining to install paths if a

virtual environment is active.

- Issue #1159051: Back out a fix for handling corrupted gzip files that

broke backwards compatibility.

- Issue #17915: Fix interoperability of xml.sax with file objects returned by

codecs.open().

- Issue #16601: Restarting iteration over tarfile no more continues from where

it left off. Patch by Michael Birtwell.

- Issue #17289: The readline module now plays nicer with external modules

or applications changing the rl_completer_word_break_characters global

variable. Initial patch by Bradley Froehle.

- Issue #12181: select module: Fix struct kevent definition on OpenBSD 64-bit

platforms. Patch by Federico Schwindt.

- Issue #14173: Avoid crashing when reading a signal handler during

interpreter shutdown.

- Issue #16316: mimetypes now recognizes the .xz and .txz (.tar.xz) extensions.

- Issue #15902: Fix imp.load_module() accepting None as a file when loading an

extension module.

- Issue #17802: Fix an UnboundLocalError in html.parser. Initial tests by

Thomas Barlow.

- Issue #15535: Fix namedtuple pickles which were picking up the OrderedDict

instead of just the underlying tuple.

- Issue #17192: Restore the patch for Issue #11729 which was ommitted in

3.3.1 when updating the bundled version of libffi used by ctypes. Update

many libffi files that were missed in 3.3.1's update to libffi-3.0.13.

- Issue #17358: Modules loaded by imp.load_source() and load_compiled() (and by

extention load_module()) now have a better chance of working when reloaded.

- Issue #17353: Plistlib emitted empty data tags with deeply nested datastructures

- Issue #11714: Use 'with' statements to assure a Semaphore releases a

condition variable. Original patch by Thomas Rachel.

- Issue #17795: Reverted backwards-incompatible change in SysLogHandler with

Unix domain sockets.

- Issue #17555: Fix ForkAwareThreadLock so that size of after fork

registry does not grow exponentially with generation of process.

- Issue #17707: multiprocessing.Queue's get() method does not block for short

timeouts.

- Isuse #17720: Fix the Python implementation of pickle.Unpickler to correctly

process the APPENDS opcode when it is used on non-list objects.

- Issue #17012: shutil.which() no longer fallbacks to the PATH environment

variable if empty path argument is specified. Patch by Serhiy Storchaka.

- Issue #17710: Fix pickle raising a SystemError on bogus input.

- Issue #17341: Include the invalid name in the error messages from re about

invalid group names.

- Issue #17702: os.environ now raises KeyError with the original environment

variable name (str on UNIX), instead of using the encoded name (bytes on

UNIX).

- Issue #16163: Make the importlib based version of pkgutil.iter_importers

work for submodules. Initial patch by Berker Peksag.

- Issue #16804: Fix a bug in the 'site' module that caused running

'python -S -m site' to incorrectly throw an exception.

- Issue #17016: Get rid of possible pointer wraparounds and integer overflows

in the re module. Patch by Nickolai Zeldovich.

- Issue #16658: add missing return to HTTPConnection.send()

Patch by Jeff Knupp.

- Issue #14971: unittest test discovery no longer gets confused when a function

has a different __name__ than its name in the TestCase class dictionary.

- Issue #17678: Fix DeprecationWarning in the http/cookiejar.py by changing the

usage of get_origin_req_host() to origin_req_host.

- Issue #17666: Fix reading gzip files with an extra field.

- Issue #17502: Process DEFAULT values in mock side_effect that returns iterator.

Patch by Michael Foord.

- Issue #17572: Avoid chained exceptions while passing bad directives to

time.strptime(). Initial patch by Claudiu Popa.

- Issue #17435: threading.Timer's __init__ method no longer uses mutable

default values for the args and kwargs parameters.

- Issue #17526: fix an IndexError raised while passing code without filename to

inspect.findsource(). Initial patch by Tyler Doyle.

- Issue #16550: Update the opcode descriptions of pickletools to use unsigned

integers where appropriate. Initial patch by Serhiy Storchaka.

IDLE

----

- Issue #17838: Allow sys.stdin to be reassigned.

- Issue #13495: Avoid loading the color delegator twice in IDLE.

- Issue #17798: Allow IDLE to edit new files when specified on command line.

- Issue #14735: Update IDLE docs to omit "Control-z on Windows".

- Issue #17585: Fixed IDLE regression. Now closes when using exit() or quit().

- Issue #17657: Show full Tk version in IDLE's about dialog.

Patch by Todd Rovito.

- Issue #17613: Prevent traceback when removing syntax colorizer in IDLE.

- Issue #1207589: Backwards-compatibility patch for right-click menu in IDLE.

- Issue #16887: IDLE now accepts Cancel in tabify/untabify dialog box.

- Issue #17625: In IDLE, close the replace dialog after it is used.

- Issue #14254: IDLE now handles readline correctly across shell restarts.

- Issue #17614: IDLE no longer raises exception when quickly closing a file.

- Issue #6698: IDLE now opens just an editor window when configured to do so.

- Issue #8900: Using keyboard shortcuts in IDLE to open a file no longer

raises an exception.