+++++++++++

Python News

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What's New in Python 3.4.6?

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

Release date: 2017-01-16

There were no changes between 3.4.6rc1 and 3.4.6 final.

What's New in Python 3.4.6rc1?

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

Release date: 2017-01-02

Core and Builtins

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

- Issue #28648: Fixed crash in Py_DecodeLocale() in debug build on Mac OS X

when decode astral characters. Patch by Xiang Zhang.

- Issue #28426: Fixed potential crash in PyUnicode_AsDecodedObject() in debug

build.

Library

-------

- Issue #28563: Fixed possible DoS and arbitrary code execution when handle

plural form selections in the gettext module. The expression parser now

supports exact syntax supported by GNU gettext.

- In the curses module, raise an error if window.getstr() or window.instr() is

passed a negative value.

- Issue #27783: Fix possible usage of uninitialized memory in operator.methodcaller.

- Issue #27774: Fix possible Py_DECREF on unowned object in _sre.

- Issue #27760: Fix possible integer overflow in binascii.b2a_qp.

- Issue #27758: Fix possible integer overflow in the _csv module for large record

lengths.

- Issue #27568: Prevent HTTPoxy attack (CVE-2016-1000110). Ignore the

HTTP_PROXY variable when REQUEST_METHOD environment is set, which indicates

that the script is in CGI mode.

- Issue #27759: Fix selectors incorrectly retain invalid file descriptors.

Patch by Mark Williams.

Build

-----

- Issue #28248: Update Windows build to use OpenSSL 1.0.2j.

Tests

-----

- Issue #27369: In test_pyexpat, avoid testing an error message detail that

changed in Expat 2.2.0.

What's New in Python 3.4.5?

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

Release date: 2016-06-26

Tests

-----

- Issue #26867: Ubuntu's openssl OP_NO_SSLv3 is forced on by default; fix test.

What's New in Python 3.4.5rc1?

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

Release date: 2016-06-11

Core and Builtins

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

- Issue #26478: Fix semantic bugs when using binary operators with dictionary

views and tuples.

- Issue #26171: Fix possible integer overflow and heap corruption in

zipimporter.get_data().

Library

-------

- Issue #26556: Update expat to 2.1.1, fixes CVE-2015-1283.

- Fix TLS stripping vulnerability in smptlib, CVE-2016-0772. Reported by Team

Oststrom

- Issue #25939: On Windows open the cert store readonly in ssl.enum_certificates.

- Issue #26012: Don't traverse into symlinks for ** pattern in

pathlib.Path.[r]glob().

- Issue #24120: Ignore PermissionError when traversing a tree with

pathlib.Path.[r]glob(). Patch by Ulrich Petri.

- Skip getaddrinfo if host is already resolved.

Patch by A. Jesse Jiryu Davis.

- Add asyncio.timeout() context manager.

- Issue #26050: Add asyncio.StreamReader.readuntil() method.

Patch by Марк Коренберг.

Tests

-----

- Issue #25940: Changed test_ssl to use self-signed.pythontest.net. This

avoids relying on svn.python.org, which recently changed root certificate.

What's New in Python 3.4.4?

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

Release date: 2015/12/20

Windows

-------

- Issue #25844: Corrected =/== typo potentially leading to crash in launcher.

What's New in Python 3.4.4rc1?

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

Release date: 2015/12/06

Core and Builtins

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

- Issue #25709: Fixed problem with in-place string concatenation and utf-8

cache.

- Issue #24097: Fixed crash in object.__reduce__() if slot name is freed inside

__getattr__.

- Issue #24731: Fixed crash on converting objects with special methods

__bytes__, __trunc__, and __float__ returning instances of subclasses of

bytes, int, and float to subclasses of bytes, int, and float correspondingly.

- Issue #25388: Fixed tokenizer crash when processing undecodable source code

with a null byte.

- Issue #22995: Default implementation of __reduce__ and __reduce_ex__ now

rejects builtin types with not defined __new__.

- Issue #24802: Avoid buffer overreads when int(), float(), compile(), exec()

and eval() are passed bytes-like objects. These objects are not

necessarily terminated by a null byte, but the functions assumed they were.

- Issue #24402: Fix input() to prompt to the redirected stdout when

sys.stdout.fileno() fails.

- Issue #24806: Prevent builtin types that are not allowed to be subclassed from

being subclassed through multiple inheritance.

- Issue #24848: Fixed a number of bugs in UTF-7 decoding of misformed data.

- Issue #25280: Import trace messages emitted in verbose (-v) mode are no

longer formatted twice.

- Issue #25003: os.urandom() doesn't use getentropy() on Solaris because

getentropy() is blocking, whereas os.urandom() should not block. getentropy()

is supported since Solaris 11.3.

- Issue #25182: The stdprinter (used as sys.stderr before the io module is

imported at startup) now uses the backslashreplace error handler.

- Issue #24891: Fix a race condition at Python startup if the file descriptor

of stdin (0), stdout (1) or stderr (2) is closed while Python is creating

sys.stdin, sys.stdout and sys.stderr objects. These attributes are now set

to None if the creation of the object failed, instead of raising an OSError

exception. Initial patch written by Marco Paolini.

- Issue #21167: NAN operations are now handled correctly when python is

compiled with ICC even if -fp-model strict is not specified.

- Issue #4395: Better testing and documentation of binary operators.

Patch by Martin Panter.

- Issue #24467: Fixed possible buffer over-read in bytearray. The bytearray

object now always allocates place for trailing null byte and it's buffer now

is always null-terminated.

- Issue #24115: Update uses of PyObject_IsTrue(), PyObject_Not(),

PyObject_IsInstance(), PyObject_RichCompareBool() and _PyDict_Contains()

to check for and handle errors correctly.

- Issue #24257: Fixed system error in the comparison of faked

types.SimpleNamespace.

- Issue #22939: Fixed integer overflow in iterator object. Patch by

Clement Rouault.

- Issue #23985: Fix a possible buffer overrun when deleting a slice from

the front of a bytearray and then appending some other bytes data.

- Issue #24102: Fixed exception type checking in standard error handlers.

- Issue #23757: PySequence_Tuple() incorrectly called the concrete list API

when the data was a list subclass.

- Issue #24407: Fix crash when dict is mutated while being updated.

- Issue #24096: Make warnings.warn_explicit more robust against mutation of the

warnings.filters list.

- Issue #23996: Avoid a crash when a delegated generator raises an

unnormalized StopIteration exception. Patch by Stefan Behnel.

- Issue #24022: Fix tokenizer crash when processing undecodable source code.

- Issue #23309: Avoid a deadlock at shutdown if a daemon thread is aborted

while it is holding a lock to a buffered I/O object, and the main thread

tries to use the same I/O object (typically stdout or stderr). A fatal

error is emitted instead.

- Issue #22977: Fixed formatting Windows error messages on Wine.

Patch by Martin Panter.

- Issue #23803: Fixed str.partition() and str.rpartition() when a separator

is wider then partitioned string.

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

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

objects.

- Issue #24044: Fix possible null pointer dereference in list.sort in out of

memory conditions.

- Issue #21354: PyCFunction_New function is exposed by python DLL again.

Library

-------

- Issue #24903: Fix regression in number of arguments compileall accepts when

'-d' is specified. The check on the number of arguments has been dropped

completely as it never worked correctly anyway.

- Issue #25764: In the subprocess module, preserve any exception caused by

fork() failure when preexec_fn is used.

- Issue #6478: _strptime's regexp cache now is reset after changing timezone

with time.tzset().

- Issue #25177: Fixed problem with the mean of very small and very large

numbers. As a side effect, statistics.mean and statistics.variance should

be significantly faster.

- Issue #25718: Fixed copying object with state with boolean value is false.

- Issue #10131: Fixed deep copying of minidom documents. Based on patch

by Marian Ganisin.

- Issue #25725: Fixed a reference leak in pickle.loads() when unpickling

invalid data including tuple instructions.

- Issue #25663: In the Readline completer, avoid listing duplicate global

names, and search the global namespace before searching builtins.

- Issue #25688: Fixed file leak in ElementTree.iterparse() raising an error.

- Issue #23914: Fixed SystemError raised by unpickler on broken pickle data.

- Issue #25691: Fixed crash on deleting ElementTree.Element attributes.

- Issue #25624: ZipFile now always writes a ZIP_STORED header for directory

entries. Patch by Dingyuan Wang.

- Issue #25583: Avoid incorrect errors raised by os.makedirs(exist_ok=True)

when the OS gives priority to errors such as EACCES over EEXIST.

- Issue #25593: Change semantics of EventLoop.stop() in asyncio.

- Issue #6973: When we know a subprocess.Popen process has died, do

not allow the send_signal(), terminate(), or kill() methods to do

anything as they could potentially signal a different process.

- Issue #25578: Fix (another) memory leak in SSLSocket.getpeercer().

- Issue #25590: In the Readline completer, only call getattr() once per

attribute.

- Issue #25498: Fix a crash when garbage-collecting ctypes objects created

by wrapping a memoryview. This was a regression made in 3.4.3. Based

on patch by Eryksun.

- Issue #18010: Fix the pydoc web server's module search function to handle

exceptions from importing packages.

- Issue #25510: fileinput.FileInput.readline() now returns b'' instead of ''

at the end if the FileInput was opened with binary mode.

Patch by Ryosuke Ito.

- Issue #25530: Disable the vulnerable SSLv3 protocol by default when creating

ssl.SSLContext.

- Issue #25569: Fix memory leak in SSLSocket.getpeercert().

- Issue #21827: Fixed textwrap.dedent() for the case when largest common

whitespace is a substring of smallest leading whitespace.

Based on patch by Robert Li.

- Issue #25471: Sockets returned from accept() shouldn't appear to be

nonblocking.

- Issue #25441: asyncio: Raise error from drain() when socket is closed.

- Issue #25411: Improved Unicode support in SMTPHandler through better use of

the email package. Thanks to user simon04 for the patch.

- Issue #25380: Fixed protocol for the STACK_GLOBAL opcode in

pickletools.opcodes.

- Issue #23972: Updates asyncio datagram create method allowing reuseport

and reuseaddr socket options to be set prior to binding the socket.

Mirroring the existing asyncio create_server method the reuseaddr option

for datagram sockets defaults to True if the O/S is 'posix' (except if the

platform is Cygwin). Patch by Chris Laws.

- Issue #25304: Add asyncio.run_coroutine_threadsafe(). This lets you

submit a coroutine to a loop from another thread, returning a

concurrent.futures.Future. By Vincent Michel.

- Issue #25319: When threading.Event is reinitialized, the underlying condition

should use a regular lock rather than a recursive lock.

- Issue #25232: Fix CGIRequestHandler to split the query from the URL at the

first question mark (?) rather than the last. Patch from Xiang Zhang.

- Issue #24657: Prevent CGIRequestHandler from collapsing slashes in the

query part of the URL as if it were a path. Patch from Xiang Zhang.

- Issue #22958: Constructor and update method of weakref.WeakValueDictionary

now accept the self and the dict keyword arguments.

- Issue #22609: Constructor of collections.UserDict now accepts the self keyword

argument.

- Issue #25262. Added support for BINBYTES8 opcode in Python implementation of

unpickler. Highest 32 bits of 64-bit size for BINUNICODE8 and BINBYTES8

opcodes no longer silently ignored on 32-bit platforms in C implementation.

- Issue #25034: Fix string.Formatter problem with auto-numbering and

nested format_specs. Patch by Anthon van der Neut.

- Issue #25233: Rewrite the guts of asyncio.Queue and

asyncio.Semaphore to be more understandable and correct.

- Issue #23600: Default implementation of tzinfo.fromutc() was returning

wrong results in some cases.

- Issue #25203: Failed readline.set_completer_delims() no longer left the

module in inconsistent state.

- Prevent overflow in _Unpickler_Read.

- Issue #25047: The XML encoding declaration written by Element Tree now

respects the letter case given by the user. This restores the ability to

write encoding names in uppercase like "UTF-8", which worked in Python 2.

- Issue #19143: platform module now reads Windows version from kernel32.dll to

avoid compatibility shims.

- Issue #23517: Fix rounding in fromtimestamp() and utcfromtimestamp() methods

of datetime.datetime: microseconds are now rounded to nearest with ties

going to nearest even integer (ROUND_HALF_EVEN), instead of being rounding

towards zero (ROUND_DOWN). It's important that these methods use the same

rounding mode than datetime.timedelta to keep the property:

(datetime(1970,1,1) + timedelta(seconds=t)) == datetime.utcfromtimestamp(t).

It also the rounding mode used by round(float) for example.

- Issue #24684: socket.socket.getaddrinfo() now calls

PyUnicode_AsEncodedString() instead of calling the encode() method of the

host, to handle correctly custom string with an encode() method which doesn't

return a byte string. The encoder of the IDNA codec is now called directly

instead of calling the encode() method of the string.

- Issue #24982: shutil.make_archive() with the "zip" format now adds entries

for directories (including empty directories) in ZIP file.

- Issue #24857: Comparing call_args to a long sequence now correctly returns a

boolean result instead of raising an exception. Patch by A Kaptur.

- Issue #25019: Fixed a crash caused by setting non-string key of expat parser.

Based on patch by John Leitch.

- Issue #24917: time_strftime() buffer over-read.

- Issue #23144: Make sure that HTMLParser.feed() returns all the data, even

when convert_charrefs is True.

- Issue #16180: Exit pdb if file has syntax error, instead of trapping user

in an infinite loop. Patch by Xavier de Gaye.

- Issue #21112: Fix regression in unittest.expectedFailure on subclasses.

Patch from Berker Peksag.

- Issue #24931: Instances of subclasses of namedtuples have their own __dict__

which breaks the inherited __dict__ property and breaks the _asdict() method.

Removed the __dict__ property to prevent the conflict and fixed _asdict().

- Issue #24764: cgi.FieldStorage.read_multi() now ignores the Content-Length

header in part headers. Patch written by Peter Landry and reviewed by Pierre

Quentel.

- Issue #24774: Fix docstring in http.server.test. Patch from Chiu-Hsiang Hsu.

- Issue #21159: Improve message in configparser.InterpolationMissingOptionError.

Patch from Łukasz Langa.

- Issue #23888: Handle fractional time in cookie expiry. Patch by ssh.

- Issue #23004: mock_open() now reads binary data correctly when the type of

read_data is bytes. Initial patch by Aaron Hill.

- Issue #23652: Make it possible to compile the select module against the

libc headers from the Linux Standard Base, which do not include some

EPOLL macros. Patch by Matt Frank.

- Issue #22932: Fix timezones in email.utils.formatdate.

Patch from Dmitry Shachnev.

- Issue #23779: imaplib raises TypeError if authenticator tries to abort.

Patch from Craig Holmquist.

- Issue #23319: Fix ctypes.BigEndianStructure, swap correctly bytes. Patch

written by Matthieu Gautier.

- Issue #23254: Document how to close the TCPServer listening socket.

Patch from Martin Panter.

- Issue #19450: Update Windows and OS X installer builds to use SQLite 3.8.11.

- Issue #23441: rcompleter now prints a tab character instead of displaying

possible completions for an empty word. Initial patch by Martin Sekera.

- Issue #24735: Fix invalid memory access in

itertools.combinations_with_replacement().

- Issue #17527: Add PATCH to wsgiref.validator. Patch from Luca Sbardella.

- Issue #24683: Fixed crashes in _json functions called with arguments of

inappropriate type.

- Issue #21697: shutil.copytree() now correctly handles symbolic links that

point to directories. Patch by Eduardo Seabra and Thomas Kluyver.

- Issue #24620: Random.setstate() now validates the value of state last element.

- Issue #22153: Improve unittest docs. Patch from Martin Panter and evilzero.

- Issue #24206: Fixed __eq__ and __ne__ methods of inspect classes.

- Issue #21750: mock_open.read_data can now be read from each instance, as it

could in Python 3.3.

- Issue #23247: Fix a crash in the StreamWriter.reset() of CJK codecs.

- Issue #18622: unittest.mock.mock_open().reset_mock would recurse infinitely.

Patch from Nicola Palumbo and Laurent De Buyst.

- Issue #24608: chunk.Chunk.read() now always returns bytes, not str.

- Issue #18684: Fixed reading out of the buffer in the re module.

- Issue #24259: tarfile now raises a ReadError if an archive is truncated

inside a data segment.

- Issue #24552: Fix use after free in an error case of the _pickle module.

- Issue #24514: tarfile now tolerates number fields consisting of only

whitespace.

- Issue #19176: Fixed doctype() related bugs in C implementation of ElementTree.

A deprecation warning no longer issued by XMLParser subclass with default

doctype() method. Direct call of doctype() now issues a warning. Parser's

doctype() now is not called if target's doctype() is called. Based on patch

by Martin Panter.

- Issue #20387: Restore semantic round-trip correctness in tokenize/untokenize

for tab-indented blocks.

- Issue #24456: Fixed possible buffer over-read in adpcm2lin() and lin2adpcm()

functions of the audioop module.

- Issue #24336: The contextmanager decorator now works with functions with

keyword arguments called "func" and "self". Patch by Martin Panter.

- Issue #24489: ensure a previously set C errno doesn't disturb cmath.polar().

- Issue #5633: Fixed timeit when the statement is a string and the setup is not.

- Issue #24326: Fixed audioop.ratecv() with non-default weightB argument.

Original patch by David Moore.

- Issue #23840: tokenize.open() now closes the temporary binary file on error

to fix a resource warning.

- Issue #24257: Fixed segmentation fault in sqlite3.Row constructor with faked

cursor type.

- Issue #22107: tempfile.gettempdir() and tempfile.mkdtemp() now try again

when a directory with the chosen name already exists on Windows as well as

on Unix. tempfile.mkstemp() now fails early if parent directory is not

valid (not exists or is a file) on Windows.

- Issue #6598: Increased time precision and random number range in

email.utils.make_msgid() to strengthen the uniqueness of the message ID.

- Issue #24091: Fixed various crashes in corner cases in C implementation of

ElementTree.

- Issue #21931: msilib.FCICreate() now raises TypeError in the case of a bad

argument instead of a ValueError with a bogus FCI error number.

Patch by Jeffrey Armstrong.

- Issue #23796: peek and read1 methods of BufferedReader now raise ValueError

if they called on a closed object. Patch by John Hergenroeder.

- Issue #24521: Fix possible integer overflows in the pickle module.

- Issue #22931: Allow '[' and ']' in cookie values.

- Issue #20274: Remove ignored and erroneous "kwargs" parameters from three

METH_VARARGS methods on _sqlite.Connection.

- Issue #24094: Fix possible crash in json.encode with poorly behaved dict

subclasses.

- Asyncio issue 222 / PR 231 (Victor Stinner) -- fix @coroutine

functions without __name__.

- Issue #9246: On POSIX, os.getcwd() now supports paths longer than 1025 bytes.

Patch written by William Orr.

- The keywords attribute of functools.partial is now always a dictionary.

- Issues #24099, #24100, and #24101: Fix free-after-use bug in heapq's siftup

and siftdown functions.

- Backport collections.deque fixes from Python 3.5. Prevents reentrant badness

during deletion by deferring the decref until the container has been restored

to a consistent state.

- Issue #23008: Fixed resolving attributes with boolean value is False in pydoc.

- Fix asyncio issue 235: LifoQueue and PriorityQueue's put didn't

increment unfinished tasks (this bug was introduced in 3.4.3 when

JoinableQueue was merged with Queue).

- Issue #23908: os functions now reject paths with embedded null character

on Windows instead of silently truncate them.

- Issue #23728: binascii.crc_hqx() could return an integer outside of the range

0-0xffff for empty data.

- Issue #23811: Add missing newline to the PyCompileError error message.

Patch by Alex Shkop.

- Issue #17898: Fix exception in gettext.py when parsing certain plural forms.

- Issue #22982: Improve BOM handling when seeking to multiple positions of

a writable text file.

- Issue #23865: close() methods in multiple modules now are idempotent and more

robust at shutdown. If they need to release multiple resources, all are

released even if errors occur.

- Issue #23881: urllib.request.ftpwrapper constructor now closes the socket if

the FTP connection failed to fix a ResourceWarning.

- Issue #23400: Raise same exception on both Python 2 and 3 if sem_open is not

available. Patch by Davin Potts.

- Issue #15133: _tkinter.tkapp.getboolean() now supports Tcl_Obj and always

returns bool. tkinter.BooleanVar now validates input values (accepted bool,

int, str, and Tcl_Obj). tkinter.BooleanVar.get() now always returns bool.

- Issue #23338: Fixed formatting ctypes error messages on Cygwin.

Patch by Makoto Kato.

- Issue #16840: Tkinter now supports 64-bit integers added in Tcl 8.4 and

arbitrary precision integers added in Tcl 8.5.

- Issue #23834: Fix socket.sendto(), use the C Py_ssize_t type to store the

result of sendto() instead of the C int type.

- Issue #21526: Tkinter now supports new boolean type in Tcl 8.5.

- Issue #23838: linecache now clears the cache and returns an empty result on

MemoryError.

- Issue #18473: Fixed 2to3 and 3to2 compatible pickle mappings. Fixed

ambigious reverse mappings. Added many new mappings. Import mapping is no

longer applied to modules already mapped with full name mapping.

- Issue #23745: The new email header parser now handles duplicate MIME

parameter names without error, similar to how get_param behaves.

- Issue #23792: Ignore KeyboardInterrupt when the pydoc pager is active.

This mimics the behavior of the standard unix pagers, and prevents

pipepager from shutting down while the pager itself is still running.

- Issue #23742: ntpath.expandvars() no longer loses unbalanced single quotes.

- Issue #21802: The reader in BufferedRWPair now is closed even when closing

writer failed in BufferedRWPair.close().

- Issue #23671: string.Template now allows to specify the "self" parameter as

keyword argument. string.Formatter now allows to specify the "self" and

the "format_string" parameters as keyword arguments.

- Issue #21560: An attempt to write a data of wrong type no longer cause

GzipFile corruption. Original patch by Wolfgang Maier.

- Issue #23647: Increase impalib's MAXLINE to accommodate modern mailbox sizes.

- Issue #23539: If body is None, http.client.HTTPConnection.request now sets

Content-Length to 0 for PUT, POST, and PATCH headers to avoid 411 errors from

some web servers.

- Issue #22351: The nntplib.NNTP constructor no longer leaves the connection

and socket open until the garbage collector cleans them up. Patch by

Martin Panter.

- Issue #23136: _strptime now uniformly handles all days in week 0, including

Dec 30 of previous year. Based on patch by Jim Carroll.

- Issue #23700: Iterator of NamedTemporaryFile now keeps a reference to

NamedTemporaryFile instance. Patch by Bohuslav Kabrda.

- Issue #22903: The fake test case created by unittest.loader when it fails

importing a test module is now picklable.

- Issue #23568: Add rdivmod support to MagicMock() objects.

Patch by Håkan Lövdahl.

- 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.

- Issue #23801: Fix issue where cgi.FieldStorage did not always ignore the

entire preamble to a multipart body.

- Issue #23310: Fix MagicMock's initializer to work with __methods__, just

like configure_mock(). Patch by Kasia Jachim.

- asyncio: New event loop APIs: set_task_factory() and get_task_factory().

- asyncio: async() function is deprecated in favour of ensure_future().

- Issue #23898: Fix inspect.classify_class_attrs() to support attributes

with overloaded __eq__ and __bool__. Patch by Mike Bayer.

- Issue #24298: Fix inspect.signature() to correctly unwrap wrappers

around bound methods.

- Issue #23572: Fixed functools.singledispatch on classes with falsy

metaclasses. Patch by Ethan Furman.

IDLE

----

- Issue 15348: Stop the debugger engine (normally in a user process)

before closing the debugger window (running in the IDLE process).

This prevents the RuntimeErrors that were being caught and ignored.

- Issue #24455: Prevent IDLE from hanging when a) closing the shell while the

debugger is active (15347); b) closing the debugger with the [X] button

(15348); and c) activating the debugger when already active (24455).

The patch by Mark Roseman does this by making two changes.

1. Suspend and resume the gui.interaction method with the tcl vwait

mechanism intended for this purpose (instead of root.mainloop & .quit).

2. In gui.run, allow any existing interaction to terminate first.

- Change 'The program' to 'Your program' in an IDLE 'kill program?' message

to make it clearer that the program referred to is the currently running

user program, not IDLE itself.

- Issue #24750: Improve the appearance of the IDLE editor window status bar.

Patch by Mark Roseman.

- Issue #25313: Change the handling of new built-in text color themes to better

address the compatibility problem introduced by the addition of IDLE Dark.

Consistently use the revised idleConf.CurrentTheme everywhere in idlelib.

- Issue #24782: Extension configuration is now a tab in the IDLE Preferences

dialog rather than a separate dialog. The former tabs are now a sorted

list. Patch by Mark Roseman.

- Issue #22726: Re-activate the config dialog help button with some content

about the other buttons and the new IDLE Dark theme.

- Issue #24820: IDLE now has an 'IDLE Dark' built-in text color theme.

It is more or less IDLE Classic inverted, with a cobalt blue background.

Strings, comments, keywords, ... are still green, red, orange, ... .

To use it with IDLEs released before November 2015, hit the

'Save as New Custom Theme' button and enter a new name,

such as 'Custom Dark'. The custom theme will work with any IDLE

release, and can be modified.

- Issue #25224: README.txt is now an idlelib index for IDLE developers and

curious users. The previous user content is now in the IDLE doc chapter.

'IDLE' now means 'Integrated Development and Learning Environment'.

- Issue #24820: Users can now set breakpoint colors in

Settings -> Custom Highlighting. Original patch by Mark Roseman.

- Issue #24972: Inactive selection background now matches active selection

background, as configured by users, on all systems. Found items are now

always highlighted on Windows. Initial patch by Mark Roseman.

- Issue #24570: Idle: make calltip and completion boxes appear on Macs

affected by a tk regression. Initial patch by Mark Roseman.

- Issue #24988: Idle ScrolledList context menus (used in debugger)

now work on Mac Aqua. Patch by Mark Roseman.

- Issue #24801: Make right-click for context menu work on Mac Aqua.

Patch by Mark Roseman.

- Issue #25173: Associate tkinter messageboxes with a specific widget.

For Mac OSX, make them a 'sheet'. Patch by Mark Roseman.

- Issue #25198: Enhance the initial html viewer now used for Idle Help.

* Properly indent fixed-pitch text (patch by Mark Roseman).

* Give code snippet a very Sphinx-like light blueish-gray background.

* Re-use initial width and height set by users for shell and editor.

* When the Table of Contents (TOC) menu is used, put the section header

at the top of the screen.

- Issue #25225: Condense and rewrite Idle doc section on text colors.

- Issue #21995: Explain some differences between IDLE and console Python.

- Issue #22820: Explain need for *print* when running file from Idle editor.

- Issue #25224: Doc: augment Idle feature list and no-subprocess section.

- Issue #25219: Update doc for Idle command line options.

Some were missing and notes were not correct.

- Issue #24861: Most of idlelib is private and subject to change.

Use idleib.idle.* to start Idle. See idlelib.__init__.__doc__.

- Issue #25199: Idle: add synchronization comments for future maintainers.

- Issue #16893: Replace help.txt with help.html for Idle doc display.

The new idlelib/help.html is rstripped Doc/build/html/library/idle.html.

It looks better than help.txt and will better document Idle as released.

The tkinter html viewer that works for this file was written by Mark Roseman.

The now unused EditorWindow.HelpDialog class and helt.txt file are deprecated.

- Issue #24199: Deprecate unused idlelib.idlever with possible removal in 3.6.

- Issue #24790: Remove extraneous code (which also create 2 & 3 conflicts).

- Issue #23672: Allow Idle to edit and run files with astral chars in name.

Patch by Mohd Sanad Zaki Rizvi.

- Issue 24745: Idle editor default font. Switch from Courier to

platform-sensitive TkFixedFont. This should not affect current customized

font selections. If there is a problem, edit $HOME/.idlerc/config-main.cfg

and remove 'fontxxx' entries from [Editor Window]. Patch by Mark Roseman.

- Issue #21192: Idle editor. When a file is run, put its name in the restart bar.

Do not print false prompts. Original patch by Adnan Umer.

- Issue #13884: Idle menus. Remove tearoff lines. Patch by Roger Serwy.

- Issue #23184: remove unused names and imports in idlelib.

Initial patch by Al Sweigart.

Tests

-----

- Issue #25616: Tests for OrderedDict are extracted from test_collections

into separate file test_ordered_dict.

- Issue #25099: Make test_compileall not fail when an entry on sys.path cannot

be written to (commonly seen in administrative installs on Windows).

- Issue #24751: When running regrtest with the ``-w`` command line option,

a test run is no longer marked as a failure if all tests succeed when

re-run.

- Issue #21520: test_zipfile no longer fails if the word 'bad' appears

anywhere in the name of the current directory.

- Issue #23799: Added test.support.start_threads() for running and

cleaning up multiple threads.

- Issue #22390: test.regrtest now emits a warning if temporary files or

directories are left after running a test.

- Issue #23583: Added tests for standard IO streams in IDLE.

Build

-----

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

the resulting executable faster.

- Issue #24603: Update Windows builds to use OpenSSL1.0.2d

and OS X 10.5 installer to use OpenSSL 1.0.2e.

C API

-----

- Issue #23998: PyImport_ReInitLock() now checks for lock allocation error

Documentation

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

- Issue #12067: Rewrite Comparisons section in the Expressions chapter of the

language reference. Some of the details of comparing mixed types were

incorrect or ambiguous. NotImplemented is only relevant at a lower level

than the Expressions chapter. Added details of comparing range() objects,

and default behaviour and consistency suggestions for user-defined classes.

Patch from Andy Maier.

- Issue #24952: Clarify the default size argument of stack_size() in

the "threading" and "_thread" modules. Patch from Mattip.

- Issue #24808: Update the types of some PyTypeObject fields. Patch by

Joseph Weston.

- Issue #22812: Fix unittest discovery examples.

Patch from Pam McA'Nulty.

- Issue #24129: Clarify the reference documentation for name resolution.

This includes removing the assumption that readers will be familiar with the

name resolution scheme Python used prior to the introduction of lexical

scoping for function namespaces. Patch by Ivan Levkivskyi.

- Issue #20769: Improve reload() docs. Patch by Dorian Pula.

- Issue #23589: Remove duplicate sentence from the FAQ. Patch by Yongzhi Pan.

- Issue #24729: Correct IO tutorial to match implementation regarding

encoding parameter to open function.

- Issue #24351: Clarify what is meant by "identifier" in the context of

string.Template instances.

- Issue #22155: Add File Handlers subsection with createfilehandler to tkinter

doc. Remove obsolete example from FAQ. Patch by Martin Panter.

- Issue #24029: Document the name binding behavior for submodule imports.

- Issue #24077: Fix typo in man page for -I command option: -s, not -S.

Tools/Demos

-----------

- Issue #25440: Fix output of python-config --extension-suffix.

- Issue #23330: h2py now supports arbitrary filenames in #include.

- Issue #24031: make patchcheck now supports git checkouts, too.

Windows

-------

- Issue #24306: Sets component ID for launcher to match 3.5 and later

to avoid downgrading.

- Issue #25022: Removed very outdated PC/example_nt/ directory.

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.