+++++++++++

Python News

+++++++++++

What's New in Python 3.4.4rc1?

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

Release date: tba

Core and Builtins

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

- Issue #23192: Fixed generator lambdas. Patch by Bruno Cauet.

- Issue #23629: Fix the default __sizeof__ implementation for variable-sized

objects.

Library

-------

- Issue #23138: Fixed parsing cookies with absent keys or values in cookiejar.

Patch by Demian Brecht.

- Issue #23051: multiprocessing.Pool methods imap() and imap_unordered() now

handle exceptions raised by an iterator. Patch by Alon Diamant and Davin

Potts.

- Issue #22928: Disabled HTTP header injections in http.client.

Original patch by Demian Brecht.

- Issue #23615: Modules bz2, tarfile and tokenize now can be reloaded with

imp.reload(). Patch by Thomas Kluyver.

- Issue #23476: In the ssl module, enable OpenSSL's X509_V_FLAG_TRUSTED_FIRST

flag on certificate stores when it is available.

- Issue #23576: Avoid stalling in SSL reads when EOF has been reached in the

SSL layer but the underlying connection hasn't been closed.

- Issue #23504: Added an __all__ to the types module.

- Issue #20204: Added the __module__ attribute to _tkinter classes.

- Issue #23521: Corrected pure python implementation of timedelta division.

* Eliminated OverflowError from timedelta * float for some floats;

* Corrected rounding in timedlta true division.

- Issue #21619: Popen objects no longer leave a zombie after exit in the with

statement if the pipe was broken. Patch by Martin Panter.

- Issue #6639: Module-level turtle functions no longer raise TclError after

closing the window.

- Issues #814253, #9179: Warnings now are raised when group references and

conditional group references are used in lookbehind assertions in regular

expressions.

- Issue #23215: Multibyte codecs with custom error handlers that ignores errors

consumed too much memory and raised SystemError or MemoryError.

Original patch by Aleksi Torhamo.

- Issue #5700: io.FileIO() called flush() after closing the file.

flush() was not called in close() if closefd=False.

- Issue #23374: Fixed pydoc failure with non-ASCII files when stdout encoding

differs from file system encoding (e.g. on Mac OS).

- Issue #23481: Remove RC4 from the SSL module's default cipher list.

- Issue #21548: Fix pydoc.synopsis() and pydoc.apropos() on modules with empty

docstrings.

- Issue #22885: Fixed arbitrary code execution vulnerability in the dbm.dumb

module. Original patch by Claudiu Popa.

- Issue #23146: Fix mishandling of absolute Windows paths with forward

slashes in pathlib.

- Issue #23421: Fixed compression in tarfile CLI. Patch by wdv4758h.

- Issue #23367: Fix possible overflows in the unicodedata module.

- Issue #23361: Fix possible overflow in Windows subprocess creation code.

Build

-----

- Issue #23445: pydebug builds now use "gcc -Og" where possible, to make

the resulting executable faster.

- Issue #23593: Update OS X 10.5 installer build to use OpenSSL 1.0.2.

What's New in Python 3.4.3?

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

Release date: 2015-02-23

Core and Builtins

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

- Issue #22735: Fix many edge cases (including crashes) involving custom mro()

implementations.

- Issue #22896: Avoid using PyObject_AsCharBuffer(), PyObject_AsReadBuffer()

and PyObject_AsWriteBuffer().

- Issue #21295: Revert some changes (issue #16795) to AST line numbers and

column offsets that constituted a regression.

- Issue #21408: The default __ne__() now returns NotImplemented if __eq__()

returned NotImplemented. Original patch by Martin Panter.

- Issue #23321: Fixed a crash in str.decode() when error handler returned

replacment string longer than mailformed input data.

- Issue #23048: Fix jumping out of an infinite while loop in the pdb.

- Issue #20335: bytes constructor now raises TypeError when encoding or errors

is specified with non-string argument. Based on patch by Renaud Blanch.

- Issue #22335: Fix crash when trying to enlarge a bytearray to 0x7fffffff

bytes on a 32-bit platform.

- Issue #22653: Fix an assertion failure in debug mode when doing a reentrant

dict insertion in debug mode.

- Issue #22643: Fix integer overflow in Unicode case operations (upper, lower,

title, swapcase, casefold).

- Issue #22604: Fix assertion error in debug mode when dividing a complex

number by (nan+0j).

- Issue #22470: Fixed integer overflow issues in "backslashreplace",

"xmlcharrefreplace", and "surrogatepass" error handlers.

- Issue #22520: Fix overflow checking when generating the repr of a unicode

object.

- Issue #22519: Fix overflow checking in PyBytes_Repr.

- Issue #22518: Fix integer overflow issues in latin-1 encoding.

- Issue #23165: Perform overflow checks before allocating memory in the

_Py_char2wchar function.

Library

-------

- Issue #23399: pyvenv creates relative symlinks where possible.

- Issue #23099: Closing io.BytesIO with exported buffer is rejected now to

prevent corrupting exported buffer.

- Issue #23363: Fix possible overflow in itertools.permutations.

- Issue #23364: Fix possible overflow in itertools.product.

- Issue #23366: Fixed possible integer overflow in itertools.combinations.

- Issue #23369: Fixed possible integer overflow in

_json.encode_basestring_ascii.

- Issue #23353: Fix the exception handling of generators in

PyEval_EvalFrameEx(). At entry, save or swap the exception state even if

PyEval_EvalFrameEx() is called with throwflag=0. At exit, the exception state

is now always restored or swapped, not only if why is WHY_YIELD or

WHY_RETURN. Patch co-written with Antoine Pitrou.

- Issue #18518: timeit now rejects statements which can't be compiled outside

a function or a loop (e.g. "return" or "break").

- Issue #23094: Fixed readline with frames in Python implementation of pickle.

- Issue #23268: Fixed bugs in the comparison of ipaddress classes.

- Issue #21408: Removed incorrect implementations of __ne__() which didn't

returned NotImplemented if __eq__() returned NotImplemented. The default

__ne__() now works correctly.

- Issue #19996: :class:`email.feedparser.FeedParser` now handles (malformed)

headers with no key rather than assuming the body has started.

- Issue #23248: Update ssl error codes from latest OpenSSL git master.

- Issue #23098: 64-bit dev_t is now supported in the os module.

- Issue #23250: In the http.cookies module, capitalize "HttpOnly" and "Secure"

as they are written in the standard.

- Issue #23063: In the disutils' check command, fix parsing of reST with code or

code-block directives.

- Issue #23209, #23225: selectors.BaseSelector.close() now clears its internal

reference to the selector mapping to break a reference cycle. Initial patch

written by Martin Richard.

- Issue #21356: Make ssl.RAND_egd() optional to support LibreSSL. The

availability of the function is checked during the compilation. Patch written

by Bernard Spil.

- Issue #20896, #22935: The :func:`ssl.get_server_certificate` function now

uses the :data:`~ssl.PROTOCOL_SSLv23` protocol by default, not

:data:`~ssl.PROTOCOL_SSLv3`, for maximum compatibility and support platforms

where :data:`~ssl.PROTOCOL_SSLv3` support is disabled.

- Issue #23111: In the ftplib, make ssl.PROTOCOL_SSLv23 the default protocol

version.

- Issue #23132: Mitigate regression in speed and clarity in functools.total_ordering.

- Issue #22585: On OpenBSD 5.6 and newer, os.urandom() now calls getentropy(),

instead of reading /dev/urandom, to get pseudo-random bytes.

- Issue #23112: Fix SimpleHTTPServer to correctly carry the query string and

fragment when it redirects to add a trailing slash.

- Issue #23093: In the io, module allow more operations to work on detached

streams.

- Issue #19104: pprint now produces evaluable output for wrapped strings.

- Issue #23071: Added missing names to codecs.__all__. Patch by Martin Panter.

- Issue #15513: Added a __sizeof__ implementation for pickle classes.

- Issue #19858: pickletools.optimize() now aware of the MEMOIZE opcode, can

produce more compact result and no longer produces invalid output if input

data contains MEMOIZE opcodes together with PUT or BINPUT opcodes.

- Issue #22095: Fixed HTTPConnection.set_tunnel with default port. The port

value in the host header was set to "None". Patch by Demian Brecht.

- Issue #23016: A warning no longer produces an AttributeError when the program

is run with pythonw.exe.

- Issue #21775: shutil.copytree(): fix crash when copying to VFAT. An exception

handler assumed that that OSError objects always have a 'winerror' attribute.

That is not the case, so the exception handler itself raised AttributeError

when run on Linux (and, presumably, any other non-Windows OS).

Patch by Greg Ward.

- Issue #1218234: Fix inspect.getsource() to load updated source of

reloaded module. Initial patch by Berker Peksag.

- Issue #22959: In the constructor of http.client.HTTPSConnection, prefer the

context's check_hostname attribute over the *check_hostname* parameter.

- Issue #16043: Add a default limit for the amount of data xmlrpclib.gzip_decode

will return. This resolves CVE-2013-1753.

- Issue #22966: Fix __pycache__ pyc file name clobber when pyc_compile is

asked to compile a source file containing multiple dots in the source file

name.

- Issue #21971: Update turtledemo doc and add module to the index.

- Issue #21032. Fixed socket leak if HTTPConnection.getresponse() fails.

Original patch by Martin Panter.

- Issue #22960: Add a context argument to xmlrpclib.ServerProxy constructor.

- Issue #22915: SAX parser now supports files opened with file descriptor or

bytes path.

- Issue #22609: Constructors and update methods of mapping classes in the

collections module now accept the self keyword argument.

- Issue #22788: Add *context* parameter to logging.handlers.HTTPHandler.

- Issue #22921: Allow SSLContext to take the *hostname* parameter even if

OpenSSL doesn't support SNI.

- Issue #22894: TestCase.subTest() would cause the test suite to be stopped

when in failfast mode, even in the absence of failures.

- Issue #22638: SSLv3 is now disabled throughout the standard library.

It can still be enabled by instantiating a SSLContext manually.

- Issue #22370: Windows detection in pathlib is now more robust.

- Issue #22841: Reject coroutines in asyncio add_signal_handler().

Patch by Ludovic.Gasc.

- Issue #22849: Fix possible double free in the io.TextIOWrapper constructor.

- Issue #12728: Different Unicode characters having the same uppercase but

different lowercase are now matched in case-insensitive regular expressions.

- Issue #22821: Fixed fcntl() with integer argument on 64-bit big-endian

platforms.

- Issue #22406: Fixed the uu_codec codec incorrectly ported to 3.x.

Based on patch by Martin Panter.

- Issue #17293: uuid.getnode() now determines MAC address on AIX using netstat.

Based on patch by Aivars Kalvāns.

- Issue #22769: Fixed ttk.Treeview.tag_has() when called without arguments.

- Issue #22417: Verify certificates by default in httplib (PEP 476).

- Issue #22775: Fixed unpickling of http.cookies.SimpleCookie with protocol 2

and above. Patch by Tim Graham.

- Issue #22366: urllib.request.urlopen will accept a context object

(SSLContext) as an argument which will then used be for HTTPS connection.

Patch by Alex Gaynor.

- Issue #22776: Brought excluded code into the scope of a try block in

SysLogHandler.emit().

- Issue #22665: Add missing get_terminal_size and SameFileError to

shutil.__all__.

- Issue #17381: Fixed handling of case-insensitive ranges in regular

expressions.

- Issue #22410: Module level functions in the re module now cache compiled

locale-dependent regular expressions taking into account the locale.

- Issue #22759: Query methods on pathlib.Path() (exists(), is_dir(), etc.)

now return False when the underlying stat call raises NotADirectoryError.

- Issue #8876: distutils now falls back to copying files when hard linking

doesn't work. This allows use with special filesystems such as VirtualBox

shared folders.

- Issue #18853: Fixed ResourceWarning in shlex.__nain__.

- Issue #9351: Defaults set with set_defaults on an argparse subparser

are no longer ignored when also set on the parent parser.

- Issue #21991: Make email.headerregistry's header 'params' attributes

be read-only (MappingProxyType). Previously the dictionary was modifiable

but a new one was created on each access of the attribute.

- Issue #22641: In asyncio, the default SSL context for client connections

is now created using ssl.create_default_context(), for stronger security.

- Issue #22435: Fix a file descriptor leak when SocketServer bind fails.

- Issue #13096: Fixed segfault in CTypes POINTER handling of large

values.

- Issue #11694: Raise ConversionError in xdrlib as documented. Patch

by Filip Gruszczyński and Claudiu Popa.

- Issue #22462: Fix pyexpat's creation of a dummy frame to make it

appear in exception tracebacks.

- Issue #21173: Fix len() on a WeakKeyDictionary when .clear() was called

with an iterator alive.

- Issue #11866: Eliminated race condition in the computation of names

for new threads.

- Issue #21905: Avoid RuntimeError in pickle.whichmodule() when sys.modules

is mutated while iterating. Patch by Olivier Grisel.

- Issue #22219: The zipfile module CLI now adds entries for directories

(including empty directories) in ZIP file.

- Issue #22449: In the ssl.SSLContext.load_default_certs, consult the

enviromental variables SSL_CERT_DIR and SSL_CERT_FILE on Windows.

- Issue #20076: Added non derived UTF-8 aliases to locale aliases table.

- Issue #20079: Added locales supported in glibc 2.18 to locale alias table.

- Issue #22396: On 32-bit AIX platform, don't expose os.posix_fadvise() nor

os.posix_fallocate() because their prototypes in system headers are wrong.

- Issue #22517: When a io.BufferedRWPair object is deallocated, clear its

weakrefs.

- Issue #22448: Improve canceled timer handles cleanup to prevent

unbound memory usage. Patch by Joshua Moore-Oliva.

- Issue #23009: Make sure selectors.EpollSelecrtor.select() works when no

FD is registered.

IDLE

----

- Issue #20577: Configuration of the max line length for the FormatParagraph

extension has been moved from the General tab of the Idle preferences dialog

to the FormatParagraph tab of the Config Extensions dialog.

Patch by Tal Einat.

- Issue #16893: Update Idle doc chapter to match current Idle and add new

information.

- Issue #3068: Add Idle extension configuration dialog to Options menu.

Changes are written to HOME/.idlerc/config-extensions.cfg.

Original patch by Tal Einat.

- Issue #16233: A module browser (File : Class Browser, Alt+C) requires a

editor window with a filename. When Class Browser is requested otherwise,

from a shell, output window, or 'Untitled' editor, Idle no longer displays

an error box. It now pops up an Open Module box (Alt+M). If a valid name

is entered and a module is opened, a corresponding browser is also opened.

- Issue #4832: Save As to type Python files automatically adds .py to the

name you enter (even if your system does not display it). Some systems

automatically add .txt when type is Text files.

- Issue #21986: Code objects are not normally pickled by the pickle module.

To match this, they are no longer pickled when running under Idle.

- Issue #23180: Rename IDLE "Windows" menu item to "Window".

Patch by Al Sweigart.

Tests

-----

- Issue #23392: Added tests for marshal C API that works with FILE*.

- Issue #18982: Add tests for CLI of the calendar module.

- Issue #19548: Added some additional checks to test_codecs to ensure that

statements in the updated documentation remain accurate. Patch by Martin

Panter.

- Issue #22838: All test_re tests now work with unittest test discovery.

- Issue #22173: Update lib2to3 tests to use unittest test discovery.

- Issue #16000: Convert test_curses to use unittest.

- Issue #21456: Skip two tests in test_urllib2net.py if _ssl module not

present. Patch by Remi Pointel.

- Issue #22770: Prevent some Tk segfaults on OS X when running gui tests.

- Issue #23211: Workaround test_logging failure on some OS X 10.6 systems.

- Issue #23345: Prevent test_ssl failures with large OpenSSL patch level

values (like 0.9.8zc).

Build

-----

- Issue #15506: Use standard PKG_PROG_PKG_CONFIG autoconf macro in the configure

script.

- Issue #22935: Allow the ssl module to be compiled if openssl doesn't support

SSL 3.

- Issue #16537: Check whether self.extensions is empty in setup.py. Patch by

Jonathan Hosmer.

- Issue #18096: Fix library order returned by python-config.

- Issue #17219: Add library build dir for Python extension cross-builds.

- Issue #17128: Use private version of OpenSSL for 3.4.3 OS X 10.5+ installer.

C API

-----

- Issue #22079: PyType_Ready() now checks that statically allocated type has

no dynamically allocated bases.

Documentation

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

- Issue #19548: Update the codecs module documentation to better cover the

distinction between text encodings and other codecs, together with other

clarifications. Patch by Martin Panter.

- Issue #22914: Update the Python 2/3 porting HOWTO to describe a more automated

approach.

- Issue #21514: The documentation of the json module now refers to new JSON RFC

7159 instead of obsoleted RFC 4627.

Tools/Demos

-----------

- Issue #22314: pydoc now works when the LINES environment variable is set.

Windows

-------

- Issue #17896: The Windows build scripts now expect external library sources

to be in ``PCbuild\..\externals`` rather than ``PCbuild\..\..``.

- Issue #17717: The Windows build scripts now use a copy of NASM pulled from

svn.python.org to build OpenSSL.

- Issue #22644: The bundled version of OpenSSL has been updated to 1.0.1j.

What's New in Python 3.4.2?

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

Release date: 2014-10-06

Core and Builtins

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

Library

-------

- Issue #10510: distutils register and upload methods now use HTML standards

compliant CRLF line endings.

- Issue #9850: Fixed macpath.join() for empty first component. Patch by

Oleg Oshmyan.

- Issue #22427: TemporaryDirectory no longer attempts to clean up twice when

used in the with statement in generator.

- Issue #20912: Now directories added to ZIP file have correct Unix and MS-DOS

directory attributes.

- Issue #21866: ZipFile.close() no longer writes ZIP64 central directory

records if allowZip64 is false.

- Issue #22415: Fixed debugging output of the GROUPREF_EXISTS opcode in the re

module. Removed trailing spaces in debugging output.

- Issue #22423: Unhandled exception in thread no longer causes unhandled

AttributeError when sys.stderr is None.

- Issue #21332: Ensure that ``bufsize=1`` in subprocess.Popen() selects

line buffering, rather than block buffering. Patch by Akira Li.

What's New in Python 3.4.2rc1?

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

Release date: 2014-09-22

Core and Builtins

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

- Issue #22258: Fix the the internal function set_inheritable() on Illumos.

This platform exposes the function ``ioctl(FIOCLEX)``, but calling it fails

with errno is ENOTTY: "Inappropriate ioctl for device". set_inheritable()

now falls back to the slower ``fcntl()`` (``F_GETFD`` and then ``F_SETFD``).

- Issue #21669: With the aid of heuristics in SyntaxError.__init__, the

parser now attempts to generate more meaningful (or at least more search

engine friendly) error messages when "exec" and "print" are used as

statements.

- Issue #21642: If the conditional if-else expression, allow an integer written

with no space between itself and the ``else`` keyword (e.g. ``True if 42else

False``) to be valid syntax.

- Issue #21523: Fix over-pessimistic computation of the stack effect of

some opcodes in the compiler. This also fixes a quadratic compilation

time issue noticeable when compiling code with a large number of "and"

and "or" operators.

Library

-------

- Issue #21091: Fix API bug: email.message.EmailMessage.is_attachment is now

a method. Since EmailMessage is provisional, we can change the API in a

maintenance release, but we use a trick to remain backward compatible with

3.4.0/1.

- Issue #21079: Fix email.message.EmailMessage.is_attachment to return the

correct result when the header has parameters as well as a value.

- Issue #22247: Add NNTPError to nntplib.__all__.

- Issue #4180: The warnings registries are now reset when the filters

are modified.

- Issue #22419: Limit the length of incoming HTTP request in wsgiref server to

65536 bytes and send a 414 error code for higher lengths. Patch contributed

by Devin Cook.

- Lax cookie parsing in http.cookies could be a security issue when combined

with non-standard cookie handling in some Web browsers. Reported by

Sergey Bobrov.

- Issue #22384: An exception in Tkinter callback no longer crashes the program

when it is run with pythonw.exe.

- Issue #22168: Prevent turtle AttributeError with non-default Canvas on OS X.

- Issue #21147: sqlite3 now raises an exception if the request contains a null

character instead of truncate it. Based on patch by Victor Stinner.

- Issue #21951: Fixed a crash in Tkinter on AIX when called Tcl command with

empty string or tuple argument.

- Issue #21951: Tkinter now most likely raises MemoryError instead of crash

if the memory allocation fails.

- Issue #22338: Fix a crash in the json module on memory allocation failure.

- Issue #22226: First letter no longer is stripped from the "status" key in

the result of Treeview.heading().

- Issue #19524: Fixed resource leak in the HTTP connection when an invalid

response is received. Patch by Martin Panter.

- Issue #22051: turtledemo no longer reloads examples to re-run them.

Initialization of variables and gui setup should be done in main(),

which is called each time a demo is run, but not on import.

- Issue #21933: Turtledemo users can change the code font size with a menu

selection or control(command) '-' or '+' or control-mousewheel.

Original patch by Lita Cho.

- Issue #21597: The separator between the turtledemo text pane and the drawing

canvas can now be grabbed and dragged with a mouse. The code text pane can

be widened to easily view or copy the full width of the text. The canvas

can be widened on small screens. Original patches by Jan Kanis and Lita Cho.

- Issue #18132: Turtledemo buttons no longer disappear when the window is

shrunk. Original patches by Jan Kanis and Lita Cho.

- Issue #22216: smtplib now resets its state more completely after a quit. The

most obvious consequence of the previous behavior was a STARTTLS failure

during a connect/starttls/quit/connect/starttls sequence.

- Issue #22185: Fix an occasional RuntimeError in threading.Condition.wait()

caused by mutation of the waiters queue without holding the lock. Patch

by Doug Zongker.

- Issue #22182: Use e.args to unpack exceptions correctly in

distutils.file_util.move_file. Patch by Claudiu Popa.

- The webbrowser module now uses subprocess's start_new_session=True rather

than a potentially risky preexec_fn=os.setsid call.

- Issue #22236: Fixed Tkinter images copying operations in NoDefaultRoot mode.

- Issue #22191: Fix warnings.__all__.

- Issue #15696: Add a __sizeof__ implementation for mmap objects on Windows.

- Issue #22068: Avoided reference loops with Variables and Fonts in Tkinter.

- Issue #22165: SimpleHTTPRequestHandler now supports undecodable file names.

- Issue #8797: Raise HTTPError on failed Basic Authentication immediately.

Initial patch by Sam Bull.

- Issue #20729: Restored the use of lazy iterkeys()/itervalues()/iteritems()

in the mailbox module.

- Issue #21448: Changed FeedParser feed() to avoid O(N**2) behavior when

parsing long line. Original patch by Raymond Hettinger.

- Issue #22184: The functools LRU Cache decorator factory now gives an earlier

and clearer error message when the user forgets the required parameters.

- Issue #17923: glob() patterns ending with a slash no longer match non-dirs on

AIX. Based on patch by Delhallt.

- Issue #21121: Don't force 3rd party C extensions to be built with

-Werror=declaration-after-statement.

- Issue #21975: Fixed crash when using uninitialized sqlite3.Row (in particular

when unpickling pickled sqlite3.Row). sqlite3.Row is now initialized in the

__new__() method.

- Issue #21580: Now Tkinter correctly handles bytes arguments passed to Tk.

In particular this allows to initialize images from binary data.

- Issue #17172: Make turtledemo start as active on OS X even when run with

subprocess. Patch by Lita Cho.

- Issue #21704: Fix build error for _multiprocessing when semaphores

are not available. Patch by Arfrever Frehtes Taifersar Arahesis.

- Fix repr(_socket.socket) on Windows 64-bit: don't fail with OverflowError

on closed socket. repr(socket.socket) already works fine.

- Issue #16133: The asynchat.async_chat.handle_read() method now ignores

BlockingIOError exceptions.

- Issue #22044: Fixed premature DECREF in call_tzinfo_method.

Patch by Tom Flanagan.

- Issue #19884: readline: Disable the meta modifier key if stdout is not

a terminal to not write the ANSI sequence "\033[1034h" into stdout. This

sequence is used on some terminal (ex: TERM=xterm-256color") to enable

support of 8 bit characters.

- Issue #21888: plistlib's load() and loads() now work if the fmt parameter is

specified.

- Issue #21044: tarfile.open() now handles fileobj with an integer 'name'

attribute. Based on patch by Antoine Pietri.

- Issue #21867: Prevent turtle crash due to invalid undo buffer size.

- Issue #19076: Don't pass the redundant 'file' argument to self.error().

- Issue #21942: Fixed source file viewing in pydoc's server mode on Windows.

- Issue #11259: asynchat.async_chat().set_terminator() now raises a ValueError

if the number of received bytes is negative.

- Issue #12523: asynchat.async_chat.push() now raises a TypeError if it doesn't

get a bytes string

- Issue #21707: Add missing kwonlyargcount argument to

ModuleFinder.replace_paths_in_code().

- Issue #20639: calling Path.with_suffix('') allows removing the suffix

again. Patch by July Tikhonov.

- Issue #21714: Disallow the construction of invalid paths using

Path.with_name(). Original patch by Antony Lee.

- Issue #21897: Fix a crash with the f_locals attribute with closure

variables when frame.clear() has been called.

- Issue #21151: Fixed a segfault in the winreg module when ``None`` is passed

as a ``REG_BINARY`` value to SetValueEx. Patch by John Ehresman.

- Issue #21090: io.FileIO.readall() does not ignore I/O errors anymore. Before,

it ignored I/O errors if at least the first C call read() succeed.

- Issue #21781: ssl.RAND_add() now supports strings longer than 2 GB.

- Issue #11453: asyncore: emit a ResourceWarning when an unclosed file_wrapper

object is destroyed. The destructor now closes the file if needed. The

close() method can now be called twice: the second call does nothing.

- Issue #21858: Better handling of Python exceptions in the sqlite3 module.

- Issue #21476: Make sure the email.parser.BytesParser TextIOWrapper is

discarded after parsing, so the input file isn't unexpectedly closed.

- Issue #21729: Used the "with" statement in the dbm.dumb module to ensure

files closing. Patch by Claudiu Popa.

- Issue #21491: socketserver: Fix a race condition in child processes reaping.

- Issue #21832: Require named tuple inputs to be exact strings.

- Issue #19145: The times argument for itertools.repeat now handles

negative values the same way for keyword arguments as it does for

positional arguments.

- Issue #21812: turtle.shapetransform did not tranform the turtle on the

first call. (Issue identified and fixed by Lita Cho.)

- Issue #21635: The difflib SequenceMatcher.get_matching_blocks() method

cache didn't match the actual result. The former was a list of tuples

and the latter was a list of named tuples.

- Issue #21722: The distutils "upload" command now exits with a non-zero

return code when uploading fails. Patch by Martin Dengler.

- Issue #21723: asyncio.Queue: support any type of number (ex: float) for the

maximum size. Patch written by Vajrasky Kok.

- Issue #21326: Add a new is_closed() method to asyncio.BaseEventLoop.

run_forever() and run_until_complete() methods of asyncio.BaseEventLoop now

raise an exception if the event loop was closed.

- Issue #21774: Fixed NameError for an incorrect variable reference in the

XML Minidom code for creating processing instructions.

(Found and fixed by Claudiu Popa.)

- Issue #21766: Prevent a security hole in CGIHTTPServer by URL unquoting paths

before checking for a CGI script at that path.

- Issue #21310: Fixed possible resource leak in failed open().

- Issue #21677: Fixed chaining nonnormalized exceptions in io close() methods.

- Issue #11709: Fix the pydoc.help function to not fail when sys.stdin is not a

valid file.

- Issue #13223: Fix pydoc.writedoc so that the HTML documentation for methods

that use 'self' in the example code is generated correctly.

- Issue #21463: In urllib.request, fix pruning of the FTP cache.

- Issue #21618: The subprocess module could fail to close open fds that were

inherited by the calling process and already higher than POSIX resource

limits would otherwise allow. On systems with a functioning /proc/self/fd

or /dev/fd interface the max is now ignored and all fds are closed.

- Issue #21552: Fixed possible integer overflow of too long string lengths in

the tkinter module on 64-bit platforms.

- Issue #14315: The zipfile module now ignores extra fields in the central

directory that are too short to be parsed instead of letting a struct.unpack

error bubble up as this "bad data" appears in many real world zip files in

the wild and is ignored by other zip tools.

- Issue #21402: tkinter.ttk now works when default root window is not set.

- Issue #10203: sqlite3.Row now truly supports sequence protocol. In particulr

it supports reverse() and negative indices. Original patch by Claudiu Popa.

- Issue #18807: If copying (no symlinks) specified for a venv, then the python

interpreter aliases (python, python3) are now created by copying rather than

symlinking.

- Issue #14710: pkgutil.get_loader() no longer raises an exception when None is

found in sys.modules.

- Issue #14710: pkgutil.find_loader() no longer raises an exception when a

module doesn't exist.

- Issue #21481: Argparse equality and inequality tests now return

NotImplemented when comparing to an unknown type.

- Issue #8743: Fix interoperability between set objects and the

collections.Set() abstract base class.

- Issue #13355: random.triangular() no longer fails with a ZeroDivisionError

when low equals high.

- Issue #21538: The plistlib module now supports loading of binary plist files

when reference or offset size is not a power of two.

- Issue #21801: Validate that __signature__ is None or an instance of Signature.

- Issue #21923: Prevent AttributeError in distutils.sysconfig.customize_compiler

due to possible uninitialized _config_vars.

- Issue #21323: Fix http.server to again handle scripts in CGI subdirectories,

broken by the fix for security issue #19435. Patch by Zach Byrne.

Extension Modules

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

- Issue #22176: Update the ctypes module's libffi to v3.1. This release

adds support for the Linux AArch64 and POWERPC ELF ABIv2 little endian

architectures.

Build

-----

- Issue #15661: python.org OS X installers are now distributed as signed

installer packages compatible with the Gatekeeper security feature.

- Issue #21958: Define HAVE_ROUND when building with Visual Studio 2013 and

above. Patch by Zachary Turner.

- Issue #15759: "make suspicious", "make linkcheck" and "make doctest" in Doc/

now display special message when and only when there are failures.

- Issue #17095: Fix Modules/Setup *shared* support.

- Issue #21811: Anticipated fixes to support OS X versions > 10.9.

- Issue #21166: Prevent possible segfaults and other random failures of

python --generate-posix-vars in pybuilddir.txt build target.

IDLE

----

- Issue #17390: Adjust Editor window title; remove 'Python',

move version to end.

- Issue #14105: Idle debugger breakpoints no longer disappear

when inseting or deleting lines.

- Issue #17172: Turtledemo can now be run from Idle.

Currently, the entry is on the Help menu, but it may move to Run.

Patch by Ramchandra Apt and Lita Cho.

- Issue #21765: Add support for non-ascii identifiers to HyperParser.

- Issue #21940: Add unittest for WidgetRedirector. Initial patch by Saimadhav

Heblikar.

- Issue #18592: Add unittest for SearchDialogBase. Patch by Phil Webster.

- Issue #21694: Add unittest for ParenMatch. Patch by Saimadhav Heblikar.

- Issue #21686: add unittest for HyperParser. Original patch by Saimadhav

Heblikar.

- Issue #12387: Add missing upper(lower)case versions of default Windows key

bindings for Idle so Caps Lock does not disable them. Patch by Roger Serwy.

- Issue #21695: Closing a Find-in-files output window while the search is

still in progress no longer closes Idle.

- Issue #18910: Add unittest for textView. Patch by Phil Webster.

- Issue #18292: Add unittest for AutoExpand. Patch by Saihadhav Heblikar.

- Issue #18409: Add unittest for AutoComplete. Patch by Phil Webster.

Tests

-----

- Issue #22166: with the assistance of a new internal _codecs._forget_codec

helping function, test_codecs now clears the encoding caches to avoid the

appearance of a reference leak

- Issue #22236: Tkinter tests now don't reuse default root window. New root

window is created for every test class.

- Issue #20746: Fix test_pdb to run in refleak mode (-R). Patch by Xavier

de Gaye.

- Issue #22060: test_ctypes has been somewhat cleaned up and simplified; it

now uses unittest test discovery to find its tests.

- Issue #22104: regrtest.py no longer holds a reference to the suite of tests

loaded from test modules that don't define test_main().

- Issue #22002: Added ``load_package_tests`` function to test.support and used

it to implement/augment test discovery in test_asyncio, test_email,

test_importlib, test_json, and test_tools.

- Issue #21976: Fix test_ssl to accept LibreSSL version strings. Thanks

to William Orr.

- Issue #21918: Converted test_tools from a module to a package containing

separate test files for each tested script.

- Issue #20155: Changed HTTP method names in failing tests in test_httpservers

so that packet filtering software (specifically Windows Base Filtering Engine)

does not interfere with the transaction semantics expected by the tests.

- Issue #19493: Refactored the ctypes test package to skip tests explicitly

rather than silently.

- Issue #18492: All resources are now allowed when tests are not run by

regrtest.py.

- Issue #21634: Fix pystone micro-benchmark: use floor division instead of true

division to benchmark integers instead of floating point numbers. Set pystone

version to 1.2. Patch written by Lennart Regebro.

- Issue #21605: Added tests for Tkinter images.

- Issue #21493: Added test for ntpath.expanduser(). Original patch by

Claudiu Popa.

- Issue #19925: Added tests for the spwd module. Original patch by Vajrasky Kok.

- Issue #21522: Added Tkinter tests for Listbox.itemconfigure(),

PanedWindow.paneconfigure(), and Menu.entryconfigure().

Documentation

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

- Issue #21777: The binary sequence methods on bytes and bytearray are now

documented explicitly, rather than assuming users will be able to derive

the expected behaviour from the behaviour of the corresponding str methods.

Windows

-------

- Issue #21671, #22160, CVE-2014-0224: The bundled version of OpenSSL has been

updated to 1.0.1i.

- Issue #10747: Use versioned labels in the Windows start menu.

Patch by Olive Kilburn.

Tools/Demos

-----------

- Issue #22201: Command-line interface of the zipfile module now correctly

extracts ZIP files with directory entries. Patch by Ryan Wilson.

- Issue #21906: Make Tools/scripts/md5sum.py work in Python 3.

Patch by Zachary Ware.

- Issue #21629: Fix Argument Clinic's "--converters" feature.

What's New in Python 3.4.1?

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

Release date: 2014-05-18

Core and Builtins

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

- Issue #21418: Fix a crash in the builtin function super() when called without

argument and without current frame (ex: embedded Python).

- Issue #21425: Fix flushing of standard streams in the interactive

interpreter.

- Issue #21435: In rare cases, when running finalizers on objects in cyclic

trash a bad pointer dereference could occur due to a subtle flaw in

internal iteration logic.

Library

-------

- Issue #10744: Fix PEP 3118 format strings on ctypes objects with a nontrivial

shape.

- Issue #20998: Fixed re.fullmatch() of repeated single character pattern

with ignore case. Original patch by Matthew Barnett.