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NEWS
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+++++++++++
Python News
+++++++++++
What's New in Python 3.4.0 Alpha 1?
===================================
*Relase date: 2014-XX-XX*
Core and Builtins
-----------------
- Issue #12370: Prevent class bodies from interfering with the __class__
closure.
- Issue #17237: Fix crash in the ASCII decoder on m68k.
- Issue #17927: Frame objects kept arguments alive if they had been
copied into a cell, even if the cell was cleared.
- Issue #1545463: At shutdown, defer finalization of codec modules so
that stderr remains usable.
- Issue #7330: Implement width and precision (ex: "%5.3s") for the format
string of PyUnicode_FromFormat() function, original patch written by Ysj Ray.
- Issue #1545463: Global variables caught in reference cycles are now
garbage-collected at shutdown.
- Issue #17094: Clear stale thread states after fork(). Note that this
is a potentially disruptive change since it may release some system
resources which would otherwise remain perpetually alive (e.g. database
connections kept in thread-local storage).
- Issue #17408: Avoid using an obsolete instance of the copyreg module when
the interpreter is shutdown and then started again.
- Issue #5845: Enable tab-completion in the interactive interpreter by
default, thanks to a new sys.__interactivehook__.
- Issue #17115,17116: Module initialization now includes setting __package__ and
__loader__ attributes to None.
- Issue #17853: Ensure locals of a class that shadow free variables always win
over the closures.
- 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 #17722: When looking up __round__, resolve descriptors.
- Issue #16061: Speed up str.replace() for replacing 1-character strings.
- Issue #17715: Fix segmentation fault from raising an exception in a __trunc__
method.
- Issue #17643: Add __callback__ attribute to weakref.ref.
- Issue #16447: Fixed potential segmentation fault when setting __name__ on a
class.
- Issue #17669: Fix crash involving finalization of generators using yield from.
- Issue #14439: Python now prints the traceback on runpy failure at startup.
- Issue #17469: Fix _Py_GetAllocatedBlocks() and sys.getallocatedblocks()
when running on valgrind.
- Issue #17619: Make input() check for Ctrl-C correctly on Windows.
- Issue #17357: Add missing verbosity messages for -v/-vv that were lost during
the importlib transition.
- Issue #17610: Don't rely on non-standard behavior of the C qsort() function.
- Issue #17323: The "[X refs, Y blocks]" printed by debug builds has been
disabled by default. It can be re-enabled with the `-X showrefcount` option.
Library
-------
- 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 #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 #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 #11816: multiple improvements to the dis module: get_instructions
generator, ability to redirect output to a file, Bytecode and Instruction
abstractions. Patch by Nick Coghlan, Ryan Kelly and Thomas Kluyver.
- Issue #13831: Embed stringification of remote traceback in local
traceback raised when pool task raises an exception.
- Issue #15528: Add weakref.finalize to support finalization using
weakref callbacks.
- Issue #14173: Avoid crashing when reading a signal handler during
interpreter shutdown.
- Issue #15902: Fix imp.load_module() accepting None as a file when loading an
extension module.
- Issue #13721: SSLSocket.getpeercert() and SSLSocket.do_handshake() now
raise an OSError with ENOTCONN, instead of an AttributeError, when the
SSLSocket is not connected.
- Issue #14679: add an __all__ (that contains only HTMLParser) to html.parser.
- Issue #17802: Fix an UnboundLocalError in html.parser. Initial tests by
Thomas Barlow.
- 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 #17804: New function ``struct.iter_unpack`` allows for streaming
struct unpacking.
- Issue #17830: When keyword.py is used to update a keyword file, it now
preserves the line endings of the original file.
- Issue #17272: Making the urllib.request's Request.full_url a descriptor.
Fixes bugs with assignment to full_url. Patch by Demian Brecht.
- 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 #16624: `subprocess.check_output` now accepts an `input` argument,
allowing the subprocess's stdin to be provided as a (byte) string.
Patch by Zack Weinberg.
- Issue #17795: Reverted backwards-incompatible change in SysLogHandler with
Unix domain sockets.
- Issue #16694: Add a pure Python implementation of the operator module.
Patch by Zachary Ware.
- Issue #11182: remove the unused and undocumented pydoc.Scanner class.
Patch by Martin Morrison.
- Issue #17741: Add ElementTree.IncrementalParser, an event-driven parser
for non-blocking applications.
- 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 #15480: Remove the deprecated and unused TYPE_INT64 code from marshal.
Initial patch by Daniel Riti.
- Issue #2118: SMTPException is now a subclass of IOError.
- 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 #9556: Allowed specifying a time-of-day for a TimedRotatingFileHandler
to rotate.
- 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 #17487: The wave getparams method now returns a namedtuple rather than
a plain tuple.
- Issue #17675: socket repr() provides local and remote addresses (if any).
Patch by Giampaolo Rodola'
- Issue #17093: Make the ABCs in importlib.abc provide default values or raise
reasonable exceptions for their methods to make them more amenable to super()
calls.
- Issue #17566: Make importlib.abc.Loader.module_repr() optional instead of an
abstractmethod and raising NotImplementedError so as to be ignored by default.
- Issue #17678: Remove the use of deprecated method in http/cookiejar.py.
Changing the usage of get_origin_req_host() to origin_req_host.
- Issue #17666: Fix reading gzip files with an extra field.
- Issue #16475: Support object instancing, recursion and interned strings
in marshal
- Issue #17502: Process DEFAULT values in mock side_effect that returns iterator.
- Issue #16795: On the ast.arguments object, unify vararg with varargannotation
and kwarg and kwargannotation. Change the column offset of ast.Attribute to be
at the attribute name.
- Issue #17434: Properly raise a SyntaxError when a string occurs between future
imports.
- Issue #17117: Import and @importlib.util.set_loader now set __loader__ when
it has a value of None or the attribute doesn't exist.
- Issue #17032: The "global" in the "NameError: global name 'x' is not defined"
error message has been removed. Patch by Ram Rachum.
Tests
-----
- Issue #17833: Fix test_gdb failures seen on machines where debug symbols
for glibc are available (seen on PPC64 Linux).
- Issue #7855: Add tests for ctypes/winreg for issues found in IronPython.
Initial patch by Dino Viehland.
- Issue #11078: test___all__ now checks for duplicates in __all__.
Initial patch by R. David Murray.
- Issue #17712: Fix test_gdb failures on Ubuntu 13.04.
- Issue #17835: Fix test_io when the default OS pipe buffer size is larger
than one million bytes.
- Issue #17065: Use process-unique key for winreg tests to avoid failures if
test is run multiple times in parallel (eg: on a buildbot host).
- Issue #12820: add tests for the xml.dom.minicompat module.
Patch by John Chandler and Phil Connell.
- Issue #17790: test_set now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17789: test_random now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17779: test_osx_env now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17766: test_iterlen now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17690: test_time now works with unittest test discovery.
Patch by Zachary Ware.
- Issue #17692: test_sqlite now works with unittest test discovery.
Patch by Zachary Ware.
Documentation
-------------
- Issue #17977: The documentation for the cadefault argument's default value
in urllib.request.urlopen() is fixed to match the code.
- Issue #15940: Specify effect of locale on time functions.
- Issue #6696: add documentation for the Profile objects, and improve
profile/cProfile docs. Patch by Tom Pinckney.
C-API
-----
- Issue #17522: Add the PyGILState_Check() API.
- Issue #17327: Add PyDict_SetDefault.
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".
Build
-----
- Issue #17547: In configure, explicitly pass -Wformat for the benefit for GCC
4.8.
What's New in Python 3.3.1 release candidate 1?
===============================================
*Release date: 24-Mar-2013*
Core and Builtins
-----------------
- Issue #17328: Fix possible refleak in dict.setdefault.
- Issue #17275: Corrected class name in init error messages of the C version of
BufferedWriter and BufferedRandom.
- Issue #7963: Fixed misleading error message that issued when object is
called without arguments.
- Issue #8745: Small speed up zipimport on Windows. Patch by Catalin Iacob.
- Issue #5308: Raise ValueError when marshalling too large object (a sequence
with size >= 2**31), instead of producing illegal marshal data.
- Issue #12983: Bytes literals with invalid \x escape now raise a SyntaxError
and a full traceback including line number.
- Issue #16967: In function definition, evaluate positional defaults before
keyword-only defaults.
- Issue #17173: Remove uses of locale-dependent C functions (isalpha() etc.)
in the interpreter.
- Issue #17137: When an Unicode string is resized, the internal wide character
string (wstr) format is now cleared.
- Issue #17043: The unicode-internal decoder no longer read past the end of
input buffer.
- Issue #17098: All modules now have __loader__ set even if they pre-exist the
bootstrapping of importlib.
- Issue #16979: Fix error handling bugs in the unicode-escape-decode decoder.
- Issue #16772: The base argument to the int constructor no longer accepts
floats, or other non-integer objects with an __int__ method. Objects
with an __index__ method are now accepted.
- Issue #10156: In the interpreter's initialization phase, unicode globals
are now initialized dynamically as needed.
- Issue #16980: Fix processing of escaped non-ascii bytes in the
unicode-escape-decode decoder.
- Issue #16975: Fix error handling bug in the escape-decode bytes decoder.
- Issue #14850: Now a charmap decoder treats U+FFFE as "undefined mapping"
in any mapping, not only in a string.
- Issue #16730: importlib.machinery.FileFinder now no longers raises an
exception when trying to populate its cache and it finds out the directory is
unreadable or has turned into a file. Reported and diagnosed by
David Pritchard.
- Issue #16906: Fix a logic error that prevented most static strings from being
cleared.
- Issue #11461: Fix the incremental UTF-16 decoder. Original patch by
Amaury Forgeot d'Arc.
- Issue #16856: Fix a segmentation fault from calling repr() on a dict with
a key whose repr raise an exception.
- Issue #16367: Fix FileIO.readall() on Windows for files larger than 2 GB.
- Issue #16761: Calling int() with base argument only now raises TypeError.
- Issue #16759: Support the full DWORD (unsigned long) range in Reg2Py
when retrieving a REG_DWORD value. This corrects functions like
winreg.QueryValueEx that may have been returning truncated values.
- Issue #14420: Support the full DWORD (unsigned long) range in Py2Reg
when passed a REG_DWORD value. Fixes OverflowError in winreg.SetValueEx.
- Issue #11939: Set the st_dev attribute of stat_result to allow Windows to
take advantage of the os.path.samefile/sameopenfile/samestat implementations
used by other platforms.
- Issue #16772: The int() constructor's second argument (base) no longer
accepts non integer values. Consistent with the behavior in Python 2.
- Issue #14470: Remove w9xpopen support per PEP 11.
- Issue #9856: Replace deprecation warning with raising TypeError
in object.__format__. Patch by Florent Xicluna.
- Issue #16597: In buffered and text IO, call close() on the underlying stream
if invoking flush() fails.
- Issue #16722: In the bytes() constructor, try to call __bytes__ on the
argument before __index__.
- Issue #16421: loading multiple modules from one shared object is now
handled correctly (previously, the first module loaded from that file
was silently returned). Patch by Václav Šmilauer.
- Issue #16602: When a weakref's target was part of a long deallocation
chain, the object could remain reachable through its weakref even though
its refcount had dropped to zero.
- Issue #16495: Remove extraneous NULL encoding check from bytes_decode().
- Issue #16619: Create NameConstant AST class to represent None, True, and False
literals. As a result, these constants are never loaded at runtime from
builtins.
- Issue #16455: On FreeBSD and Solaris, if the locale is C, the
ASCII/surrogateescape codec is now used, instead of the locale encoding, to
decode the command line arguments. This change fixes inconsistencies with
os.fsencode() and os.fsdecode() because these operating systems announces an
ASCII locale encoding, whereas the ISO-8859-1 encoding is used in practice.
- Issue #16562: Optimize dict equality testing. Patch by Serhiy Storchaka.
- Issue #16588: Silence unused-but-set warnings in Python/thread_pthread
- Issue #16592: stringlib_bytes_join doesn't raise MemoryError on allocation
failure.
- Issue #16546: Fix: ast.YieldFrom argument is now mandatory.
- Issue #16514: Fix regression causing a traceback when sys.path[0] is None
(actually, any non-string or non-bytes type).
- Issue #16306: Fix multiple error messages when unknown command line
parameters where passed to the interpreter. Patch by Hieu Nguyen.
- Issue #16215: Fix potential double memory free in str.replace(). Patch
by Serhiy Storchaka.
- Issue #16290: A float return value from the __complex__ special method is no
longer accepted in the complex() constructor.
- Issue #16416: On Mac OS X, operating system data are now always
encoded/decoded to/from UTF-8/surrogateescape, instead of the locale encoding
(which may be ASCII if no locale environment variable is set), to avoid
inconsistencies with os.fsencode() and os.fsdecode() functions which are
already using UTF-8/surrogateescape.
- Issue #16453: Fix equality testing of dead weakref objects.
- Issue #9535: Fix pending signals that have been received but not yet
handled by Python to not persist after os.fork() in the child process.
- Issue #14794: Fix slice.indices to return correct results for huge values,
rather than raising OverflowError.
- Issue #15001: fix segfault on "del sys.modules['__main__']". Patch by Victor
Stinner.
- Issue #8271: the utf-8 decoder now outputs the correct number of U+FFFD
characters when used with the 'replace' error handler on invalid utf-8
sequences. Patch by Serhiy Storchaka, tests by Ezio Melotti.
- Issue #5765: Apply a hard recursion limit in the compiler instead of
blowing the stack and segfaulting. Initial patch by Andrea Griffini.
- Issue #16402: When slicing a range, fix shadowing of exceptions from
__index__.
- Issue #16336: fix input checking in the surrogatepass error handler.
Patch by Serhiy Storchaka.
- Issue #8401: assigning an int to a bytearray slice (e.g. b[3:4] = 5) now
raises an error.
- Issue #7317: Display full tracebacks when an error occurs asynchronously.
Patch by Alon Horev with update by Alexey Kachayev.
- Issue #16309: Make PYTHONPATH="" behavior the same as if PYTHONPATH
not set at all.
- Issue #10189: Improve the error reporting of SyntaxErrors related to global
and nonlocal statements.
- Fix segfaults on setting __qualname__ on builtin types and attempting to
delete it on any type.
- Issue #14625: Rewrite the UTF-32 decoder. It is now 3x to 4x faster. Patch
written by Serhiy Storchaka.
- Issue #16345: Fix an infinite loop when ``fromkeys`` on a dict subclass
received a nonempty dict from the constructor.
- Issue #16271: Fix strange bugs that resulted from __qualname__ appearing in a
class's __dict__ and on type.
- Issue #12805: Make bytes.join and bytearray.join faster when the separator
is empty. Patch by Serhiy Storchaka.
- Issue #6074: Ensure cached bytecode files can always be updated by the
user that created them, even when the source file is read-only.
- Issue #15958: bytes.join and bytearray.join now accept arbitrary buffer
objects.
- Issue #14783: Improve int() docstring and switch docstrings for str(),
range(), and slice() to use multi-line signatures.
- Issue #16160: Subclass support now works for types.SimpleNamespace.
- Upgrade Unicode data (UCD) to version 6.2.
- Issue #15379: Fix passing of non-BMP characters as integers for the charmap
decoder (already working as unicode strings). Patch by Serhiy Storchaka.
- Issue #15144: Fix possible integer overflow when handling pointers as integer
values, by using `Py_uintptr_t` instead of `size_t`. Patch by Serhiy
Storchaka.
- Issue #15965: Explicitly cast `AT_FDCWD` as (int). Required on Solaris 10
(which defines `AT_FDCWD` as ``0xffd19553``), harmless on other platforms.
- Issue #15839: Convert SystemErrors in `super()` to RuntimeErrors.
- Issue #15448: Buffered IO now frees the buffer when closed, instead
of when deallocating.
- Issue #15846: Fix SystemError which happened when using `ast.parse()` in an
exception handler on code with syntax errors.
- Issue #15897: zipimport.c doesn't check return value of fseek().
Patch by Felipe Cruz.
- Issue #15801: Make sure mappings passed to '%' formatting are actually
subscriptable.
- Issue #15111: __import__ should propagate ImportError when raised as a
side-effect of a module triggered from using fromlist.
- Issue #15022: Add pickle and comparison support to types.SimpleNamespace.
Library
-------
- Issue #15596: Faster pickling of unicode strings.
- 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 #17540: Added style to formatter configuration by dict.
- Issue #16692: The ssl module now supports TLS 1.1 and TLS 1.2. Initial
patch by Michele Orrù.
- Issue #17025: multiprocessing: Reduce Queue and SimpleQueue contention.
- Issue #17536: Add to webbrowser's browser list: www-browser, x-www-browser,
iceweasel, iceape.
- Issue #17150: pprint now uses line continuations to wrap long string
literals.
- Issue #17488: Change the subprocess.Popen bufsize parameter default value
from unbuffered (0) to buffering (-1) to match the behavior existing code
expects and match the behavior of the subprocess module in Python 2 to avoid
introducing hard to track down bugs.
- Issue #17521: Corrected non-enabling of logger following two calls to
fileConfig().
- Issue #17508: Corrected MemoryHandler configuration in dictConfig() where
the target handler wasn't configured first.
- Issue #17209: curses.window.get_wch() now handles correctly KeyboardInterrupt
(CTRL+c).
- Issue #5713: smtplib now handles 421 (closing connection) error codes when
sending mail by closing the socket and reporting the 421 error code via the
exception appropriate to the command that received the error response.
- Issue #16997: unittest.TestCase now provides a subTest() context manager
to procedurally generate, in an easy way, small test instances.
- Issue #17485: Also delete the Request Content-Length header if the data
attribute is deleted. (Follow on to issue 16464).
- Issue #15927: CVS now correctly parses escaped newlines and carriage
when parsing with quoting turned off.
- Issue #17467: add readline and readlines support to mock_open in
unittest.mock.
- Issue #17192: Update the ctypes module's libffi to v3.0.13. This
specifically addresses a stack misalignment issue on x86 and issues on
some more recent platforms.
- Issue #8862: Fixed curses cleanup when getkey is interrputed by a signal.
- Issue #17443: imaplib.IMAP4_stream was using the default unbuffered IO
in subprocess, but the imap code assumes buffered IO. In Python2 this
worked by accident. IMAP4_stream now explicitly uses buffered IO.
- Issue #17476: Fixed regression relative to Python2 in undocumented pydoc
'allmethods'; it was missing unbound methods on the class.
- Issue #17474: Remove the deprecated methods of Request class.
- Issue #16709: unittest discover order is no-longer filesystem specific. Patch
by Jeff Ramnani.
- Use the HTTPS PyPI url for upload, overriding any plain HTTP URL in pypirc.
- Issue #5024: sndhdr.whichhdr now returns the frame count for WAV files
rather than -1.
- Issue #17460: Remove the strict argument of HTTPConnection and removing the
DeprecationWarning being issued from 3.2 onwards.
- Issue #16880: Do not assume _imp.load_dynamic() is defined in the imp module.
- Issue #16389: Fixed a performance regression relative to Python 3.1 in the
caching of compiled regular expressions.
- Added missing FeedParser and BytesFeedParser to email.parser.__all__.
- Issue #17431: Fix missing import of BytesFeedParser in email.parser.
- Issue #12921: http.server's send_error takes an explain argument to send more
information in response. Patch contributed by Karl.
- Issue #17414: Add timeit, repeat, and default_timer to timeit.__all__.
- Issue #1285086: Get rid of the refcounting hack and speed up
urllib.parse.unquote() and urllib.parse.unquote_to_bytes().
- Issue #17099: Have importlib.find_loader() raise ValueError when __loader__
is not set, harmonizing with what happens when the attribute is set to None.
- Expose the O_PATH constant in the os module if it is available.
- Issue #17368: Fix an off-by-one error in the Python JSON decoder that caused
a failure while decoding empty object literals when object_pairs_hook was
specified.
- Issue #17385: Fix quadratic behavior in threading.Condition. The FIFO
queue now uses a deque instead of a list.
- Issue #15806: Add contextlib.ignored(). This creates a context manager
to ignore specified exceptions, replacing the "except Exc: pass" idiom.
- Issue #14645: The email generator classes now produce output using the
specified linesep throughout. Previously if the prolog, epilog, or
body were stored with a different linesep, that linesep was used. This
fix corrects an RFC non-compliance issue with smtplib.send_message.
- Issue #17278: Fix a crash in heapq.heappush() and heapq.heappop() when
the list is being resized concurrently.
- Issue #16962: Use getdents64 instead of the obsolete getdents syscall
in the subprocess module on Linux.
- Issue #16935: unittest now counts the module as skipped if it raises SkipTest,
instead of counting it as an error. Patch by Zachary Ware.
- Issue #17018: Make Process.join() retry if os.waitpid() fails with EINTR.
- Issue #17223: array module: Fix a crasher when converting an array containing
invalid characters (outside range [U+0000; U+10ffff]) to Unicode:
repr(array), str(array) and array.tounicode(). Patch written by Manuel Jacob.
- Issue #17197: profile/cProfile modules refactored so that code of run() and
runctx() utility functions is not duplicated in both modules.
- Issue #14720: sqlite3: Convert datetime microseconds correctly.
Patch by Lowe Thiderman.
- Issue #15132: Allow a list for the defaultTest argument of
unittest.TestProgram. Patch by Jyrki Pulliainen.
- Issue #17225: JSON decoder now counts columns in the first line starting
with 1, as in other lines.
- Issue #6623: Added explicit DeprecationWarning for ftplib.netrc, which has
been deprecated and undocumented for a long time.
- Issue #13700: Fix byte/string handling in imaplib authentication when an
authobject is specified.
- Issue #13153: Tkinter functions now raise TclError instead of ValueError when
a string argument contains non-BMP character.
- Issue #9669: Protect re against infinite loops on zero-width matching in
non-greedy repeat. Patch by Matthew Barnett.
- Issue #13169: The maximal repetition number in a regular expression has been
increased from 65534 to 2147483647 (on 32-bit platform) or 4294967294 (on
64-bit).
- Issue #17143: Fix a missing import in the trace module. Initial patch by
Berker Peksag.
- Issue #15220: email.feedparser's line splitting algorithm is now simpler and
faster.
- Issue #16743: Fix mmap overflow check on 32 bit Windows.
- Issue #16996: webbrowser module now uses shutil.which() to find a
web-browser on the executable search path.
- Issue #16800: tempfile.gettempdir() no longer left temporary files when
the disk is full. Original patch by Amir Szekely.
- Issue #17192: Import libffi-3.0.12.
- Issue #16564: Fixed regression relative to Python2 in the operation of
email.encoders.encode_7or8bit when used with binary data.
- Issue #17052: unittest discovery should use self.testLoader.
- Issue #4591: Uid and gid values larger than 2**31 are supported now.
- Issue #17141: random.vonmisesvariate() no more hangs for large kappas.
- Issue #17149: Fix random.vonmisesvariate to always return results in
[0, 2*math.pi].
- Issue #1470548: XMLGenerator now works with binary output streams.
- Issue #6975: os.path.realpath() now correctly resolves multiple nested
symlinks on POSIX platforms.
- Issue #13773: sqlite3.connect() gets a new `uri` parameter to pass the
filename as a URI, allowing to pass custom options.
- Issue #16564: Fixed regression relative to Python2 in the operation of
email.encoders.encode_noop when used with binary data.
- Issue #10355: In SpooledTemporaryFile class mode, name, encoding and
newlines properties now work for unrolled files. Obsoleted and never
working on Python 3 xreadline method now removed.
- Issue #16686: Fixed a lot of bugs in audioop module. Fixed crashes in
avgpp(), maxpp() and ratecv(). Fixed an integer overflow in add(), bias(),
and ratecv(). reverse(), lin2lin() and ratecv() no more lose precision for
32-bit samples. max() and rms() no more returns a negative result and
various other functions now work correctly with 32-bit sample -0x80000000.
- Issue #17073: Fix some integer overflows in sqlite3 module.
- Issue #16723: httplib.HTTPResponse no longer marked closed when the connection
is automatically closed.
- Issue #15359: Add CAN_BCM protocol support to the socket module. Patch by
Brian Thorne.
- Issue #16948: Fix quoted printable body encoding for non-latin1 character
sets in the email package.
- Issue #16811: Fix folding of headers with no value in the provisional email
policies.
- Issue #17132: Update symbol for "yield from" grammar changes.
- Issue #17076: Make copying of xattrs more permissive of missing FS support.
Patch by Thomas Wouters.
- Issue #17089: Expat parser now correctly works with string input not only when
an internal XML encoding is UTF-8 or US-ASCII. It now accepts bytes and
strings larger than 2 GiB.
- Issue #6083: Fix multiple segmentation faults occured when PyArg_ParseTuple
parses nested mutating sequence.
- Issue #5289: Fix ctypes.util.find_library on Solaris.
- Issue #17106: Fix a segmentation fault in io.TextIOWrapper when an underlying
stream or a decoder produces data of an unexpected type (i.e. when
io.TextIOWrapper initialized with text stream or use bytes-to-bytes codec).
- Issue #17015: When it has a spec, a Mock object now inspects its signature
when matching calls, so that arguments can be matched positionally or
by name.
- Issue #15633: httplib.HTTPResponse is now mark closed when the server
sends less than the advertised Content-Length.
- Issue #12268: The io module file object write methods no longer abort early
when one of its write system calls is interrupted (EINTR).
- Issue #6972: The zipfile module no longer overwrites files outside of
its destination path when extracting malicious zip files.
- Issue #4844: ZipFile now raises BadZipFile when opens a ZIP file with an
incomplete "End of Central Directory" record. Original patch by Guilherme
Polo and Alan McIntyre.
- Issue #17071: Signature.bind() now works when one of the keyword arguments
is named ``self``.
- Issue #12004: Fix an internal error in PyZipFile when writing an invalid
Python file. Patch by Ben Morgan.
- Have py_compile use importlib as much as possible to avoid code duplication.
- Issue #180022: Have site.addpackage() consider already known paths even when
none are explicitly passed in. Bug report and fix by Kirill.
- Issue #1602133: on Mac OS X a shared library build (``--enable-shared``)
now fills the ``os.environ`` variable correctly.
- Issue #15505: `unittest.installHandler` no longer assumes SIGINT handler is
set to a callable object.
- Issue #13454: Fix a crash when deleting an iterator created by itertools.tee()
if all other iterators were very advanced before.
- Issue #12411: Fix to cgi.parse_multipart to correctly use bytes boundaries
and bytes data. Patch by Jonas Wagner.
- Issue #16957: shutil.which() no longer searches a bare file name in the
current directory on Unix and no longer searches a relative file path with
a directory part in PATH directories. Patch by Thomas Kluyver.
- Issue #1159051: GzipFile now raises EOFError when reading a corrupted file
with truncated header or footer.
- Issue #16993: shutil.which() now preserves the case of the path and extension
on Windows.
- Issue #16992: On Windows in signal.set_wakeup_fd, validate the file
descriptor argument.
- Issue #16422: For compatibility with the Python version, the C version of
decimal now uses strings instead of integers for rounding mode constants.
- Issue #15861: tkinter now correctly works with lists and tuples containing
strings with whitespaces, backslashes or unbalanced braces.
- Issue #9720: zipfile now writes correct local headers for files larger than
4 GiB.
- Issue #16955: Fix the poll() method for multiprocessing's socket
connections on Windows.
- SSLContext.load_dh_params() now properly closes the input file.
- Issue #15031: Refactor some .pyc management code to cut down on code
duplication. Thanks to Ronan Lamy for the report and taking an initial stab
at the problem.
- Issue #16398: Optimize deque.rotate() so that it only moves pointers
and doesn't touch the underlying data with increfs and decrefs.
- Issue #16900: Issue a ResourceWarning when an ssl socket is left unclosed.
- Issue #13899: \A, \Z, and \B now correctly match the A, Z, and B literals
when used inside character classes (e.g. '[\A]'). Patch by Matthew Barnett.
- Issue #15545: Fix regression in sqlite3's iterdump method where it was
failing if the connection used a row factory (such as sqlite3.Row) that
produced unsortable objects. (Regression was introduced by fix for 9750).
- fcntl: add F_DUPFD_CLOEXEC constant, available on Linux 2.6.24+.
- Issue #15972: Fix error messages when os functions expecting a file name or
file descriptor receive the incorrect type.
- Issue #8109: The ssl module now has support for server-side SNI, thanks
to a :meth:`SSLContext.set_servername_callback` method. Patch by Daniel
Black.
- Issue #16860: In tempfile, use O_CLOEXEC when available to set the
close-on-exec flag atomically.
- Issue #16674: random.getrandbits() is now 20-40% faster for small integers.
- Issue #16009: JSON error messages now provide more information.
- Issue #16828: Fix error incorrectly raised by bz2.compress(b'') and
bz2.BZ2Compressor.compress(b''). Initial patch by Martin Packman.
- Issue #16833: In http.client.HTTPConnection, do not concatenate the request
headers and body when the payload exceeds 16 KB, since it can consume more
memory for no benefit. Patch by Benno Leslie.
- Issue #16541: tk_setPalette() now works with keyword arguments.
- Issue #16820: In configparser, `parser.popitem()` no longer raises ValueError.
This makes `parser.clean()` work correctly.
- Issue #16820: In configparser, ``parser['section'] = {}`` now preserves
section order within the parser. This makes `parser.update()` preserve section
order as well.
- Issue #16820: In configparser, ``parser['DEFAULT'] = {}`` now correctly
clears previous values stored in the default section. Same goes for
``parser.update({'DEFAULT': {}})``.
- Issue #9586: Redefine SEM_FAILED on MacOSX to keep compiler happy.
- Issue #16787: Increase asyncore and asynchat default output buffers size, to
decrease CPU usage and increase throughput.
- Issue #10527: make multiprocessing use poll() instead of select() if available.
- Issue #16688: Now regexes contained backreferences correctly work with
non-ASCII strings. Patch by Matthew Barnett.
- Issue #16486: Make aifc files act as context managers.
- Issue #16485: Now file descriptors are closed if file header patching failed
on closing an aifc file.
- Issue #16640: Run less code under a lock in sched module.
- Issue #16165: sched.scheduler.run() no longer blocks a scheduler for other
threads.
- Issue #16641: Default values of sched.scheduler.enter() are no longer
modifiable.
- Issue #16618: Make glob.glob match consistently across strings and bytes
regarding leading dots. Patch by Serhiy Storchaka.
- Issue #16788: Add samestat to Lib/ntpath.py
- Issue #16713: Parsing of 'tel' urls using urlparse separates params from
path.
- Issue #16443: Add docstrings to regular expression match objects.
Patch by Anton Kasyanov.
- Issue #15701: Fix HTTPError info method call to return the headers information.
- Issue #16752: Add a missing import to modulefinder. Patch by Berker Peksag.
- Issue #16646: ftplib.FTP.makeport() might lose socket error details.
(patch by Serhiy Storchaka)
- Issue #16626: Fix infinite recursion in glob.glob() on Windows when the
pattern contains a wildcard in the drive or UNC path. Patch by Serhiy
Storchaka.
- Issue #15783: Except for the number methods, the C version of decimal now
supports all None default values present in decimal.py. These values were
largely undocumented.
- Issue #11175: argparse.FileType now accepts encoding and errors
arguments. Patch by Lucas Maystre.
- Issue #16488: epoll() objects now support the `with` statement. Patch
by Serhiy Storchaka.
- Issue #16298: In HTTPResponse.read(), close the socket when there is no
Content-Length and the incoming stream is finished. Patch by Eran
Rundstein.
- Add abc.ABC class to use inheritance rather than a direct invocation of
ABCMeta metaclass. Patch by Bruno Dupuis.