cpython/Misc/NEWS.d/3.5.0a4.rst

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.. bpo: 22980
.. date: 8069
.. nonce: Lu_y6y
.. release date: 2015-04-19
.. section: Core and Builtins
Under Linux, GNU/KFreeBSD and the Hurd, C extensions now include the
architecture triplet in the extension name, to make it easy to test builds
for different ABIs in the same working tree. Under OS X, the extension name
now includes PEP 3149-style information.
..
.. bpo: 22631
.. date: 8068
.. nonce: nTx_ZF
.. section: Core and Builtins
Added Linux-specific socket constant CAN_RAW_FD_FRAMES. Patch courtesy of
Joe Jevnik.
..
.. bpo: 23731
.. date: 8067
.. nonce: FOXb37
.. section: Core and Builtins
Implement PEP 488: removal of .pyo files.
..
.. bpo: 23726
.. date: 8066
.. nonce: ZopTQ0
.. section: Core and Builtins
Don't enable GC for user subclasses of non-GC types that don't add any new
fields. Patch by Eugene Toder.
..
.. bpo: 23309
.. date: 8065
.. nonce: Wfnsnz
.. section: Core and Builtins
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.
..
.. bpo: 22977
.. date: 8064
.. nonce: hutEse
.. section: Core and Builtins
Fixed formatting Windows error messages on Wine. Patch by Martin Panter.
..
.. bpo: 23466
.. date: 8063
.. nonce: KhMltK
.. section: Core and Builtins
%c, %o, %x, and %X in bytes formatting now raise TypeError on non-integer
input.
..
.. bpo: 24044
.. date: 8062
.. nonce: H7vb6-
.. section: Core and Builtins
Fix possible null pointer dereference in list.sort in out of memory
conditions.
..
.. bpo: 21354
.. date: 8061
.. nonce: ZZTe1E
.. section: Core and Builtins
PyCFunction_New function is exposed by python DLL again.
..
.. bpo: 23840
.. date: 8060
.. nonce: mtSbqO
.. section: Library
tokenize.open() now closes the temporary binary file on error to fix a
resource warning.
..
.. bpo: 16914
.. date: 8059
.. nonce: GrP2Jr
.. section: Library
new debuglevel 2 in smtplib adds timestamps to debug output.
..
.. bpo: 7159
.. date: 8058
.. nonce: KCgOUm
.. section: Library
urllib.request now supports sending auth credentials automatically after the
first 401. This enhancement is a superset of the enhancement from issue
#19494 and supersedes that change.
..
.. bpo: 23703
.. date: 8057
.. nonce: kYybxm
.. section: Library
Fix a regression in urljoin() introduced in 901e4e52b20a. Patch by Demian
Brecht.
..
.. bpo: 4254
.. date: 8056
.. nonce: eUC_2H
.. section: Library
Adds _curses.update_lines_cols(). Patch by Arnon Yaari
..
.. bpo: 19933
.. date: 8055
.. nonce: Qq8utk
.. section: Library
Provide default argument for ndigits in round. Patch by Vajrasky Kok.
..
.. bpo: 23193
.. date: 8054
.. nonce: n5ahcG
.. section: Library
Add a numeric_owner parameter to tarfile.TarFile.extract and
tarfile.TarFile.extractall. Patch by Michael Vogt and Eric Smith.
..
.. bpo: 23342
.. date: 8053
.. nonce: CbSzYI
.. section: Library
Add a subprocess.run() function than returns a CalledProcess instance for a
more consistent API than the existing call* functions.
..
.. bpo: 21217
.. date: 8052
.. nonce: TkFTlk
.. section: Library
inspect.getsourcelines() now tries to compute the start and end lines from
the code object, fixing an issue when a lambda function is used as decorator
argument. Patch by Thomas Ballinger and Allison Kaptur.
..
.. bpo: 24521
.. date: 8051
.. nonce: bn4U-y
.. section: Library
Fix possible integer overflows in the pickle module.
..
.. bpo: 22931
.. date: 8050
.. nonce: 4CuWYD
.. section: Library
Allow '[' and ']' in cookie values.
..
.. bpo: 0
.. date: 8049
.. nonce: fgX8Qe
.. section: Library
The keywords attribute of functools.partial is now always a dictionary.
..
.. bpo: 23811
.. date: 8048
.. nonce: B6tzf9
.. section: Library
Add missing newline to the PyCompileError error message. Patch by Alex
Shkop.
..
.. bpo: 21116
.. date: 8047
.. nonce: Orft3K
.. section: Library
Avoid blowing memory when allocating a multiprocessing shared array that's
larger than 50% of the available RAM. Patch by Médéric Boquien.
..
.. bpo: 22982
.. date: 8046
.. nonce: xYmG62
.. section: Library
Improve BOM handling when seeking to multiple positions of a writable text
file.
..
.. bpo: 23464
.. date: 8045
.. nonce: _XGkBk
.. section: Library
Removed deprecated asyncio JoinableQueue.
..
.. bpo: 23529
.. date: 8044
.. nonce: Hr7AHH
.. section: Library
Limit the size of decompressed data when reading from GzipFile, BZ2File or
LZMAFile. This defeats denial of service attacks using compressed bombs
(i.e. compressed payloads which decompress to a huge size). Patch by Martin
Panter and Nikolaus Rath.
..
.. bpo: 21859
.. date: 8043
.. nonce: GYrUNP
.. section: Library
Added Python implementation of io.FileIO.
..
.. bpo: 23865
.. date: 8042
.. nonce: PtSLgU
.. section: Library
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.
..
.. bpo: 23400
.. date: 8041
.. nonce: JSh9Z3
.. section: Library
Raise same exception on both Python 2 and 3 if sem_open is not available.
Patch by Davin Potts.
..
.. bpo: 10838
.. date: 8040
.. nonce: p9tSPC
.. section: Library
The subprocess now module includes SubprocessError and TimeoutError in its
list of exported names for the users wild enough to use ``from subprocess
import *``.
..
.. bpo: 23411
.. date: 8039
.. nonce: 0im3Qw
.. section: Library
Added DefragResult, ParseResult, SplitResult, DefragResultBytes,
ParseResultBytes, and SplitResultBytes to urllib.parse.__all__. Patch by
Martin Panter.
..
.. bpo: 23881
.. date: 8038
.. nonce: yZjl4b
.. section: Library
urllib.request.ftpwrapper constructor now closes the socket if the FTP
connection failed to fix a ResourceWarning.
..
.. bpo: 23853
.. date: 8037
.. nonce: mNY1eI
.. section: Library
:meth:`socket.socket.sendall` does no more reset the socket timeout each
time data is sent successfully. The socket timeout is now the maximum total
duration to send all data.
..
.. bpo: 22721
.. date: 8036
.. nonce: MVfBL9
.. section: Library
An order of multiline pprint output of set or dict containing orderable and
non-orderable elements no longer depends on iteration order of set or dict.
..
.. bpo: 15133
.. date: 8035
.. nonce: C0QfV8
.. section: Library
_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.
..
.. bpo: 10590
.. date: 8034
.. nonce: nkxXfU
.. section: Library
xml.sax.parseString() now supports string argument.
..
.. bpo: 23338
.. date: 8033
.. nonce: ZYMGN1
.. section: Library
Fixed formatting ctypes error messages on Cygwin. Patch by Makoto Kato.
..
.. bpo: 15582
.. date: 8032
.. nonce: 26wJNk
.. section: Library
inspect.getdoc() now follows inheritance chains.
..
.. bpo: 2175
.. date: 8031
.. nonce: cHiVOp
.. section: Library
SAX parsers now support a character stream of InputSource object.
..
.. bpo: 16840
.. date: 8030
.. nonce: kKIhPm
.. section: Library
Tkinter now supports 64-bit integers added in Tcl 8.4 and arbitrary
precision integers added in Tcl 8.5.
..
.. bpo: 23834
.. date: 8029
.. nonce: fX3TF4
.. section: Library
Fix socket.sendto(), use the C Py_ssize_t type to store the result of
sendto() instead of the C int type.
..
.. bpo: 23618
.. date: 8028
.. nonce: Of_q5t
.. section: Library
:meth:`socket.socket.connect` now waits until the connection completes
instead of raising :exc:`InterruptedError` if the connection is interrupted
by signals, signal handlers don't raise an exception and the socket is
blocking or has a timeout. :meth:`socket.socket.connect` still raise
:exc:`InterruptedError` for non-blocking sockets.
..
.. bpo: 21526
.. date: 8027
.. nonce: QQEXrR
.. section: Library
Tkinter now supports new boolean type in Tcl 8.5.
..
.. bpo: 23836
.. date: 8026
.. nonce: zrEmlR
.. section: Library
Fix the faulthandler module to handle reentrant calls to its signal
handlers.
..
.. bpo: 23838
.. date: 8025
.. nonce: IX6FPX
.. section: Library
linecache now clears the cache and returns an empty result on MemoryError.
..
.. bpo: 10395
.. date: 8024
.. nonce: fi_lZp
.. section: Library
Added os.path.commonpath(). Implemented in posixpath and ntpath. Based on
patch by Rafik Draoui.
..
.. bpo: 23611
.. date: 8023
.. nonce: QkBJVB
.. section: Library
Serializing more "lookupable" objects (such as unbound methods or nested
classes) now are supported with pickle protocols < 4.
..
.. bpo: 13583
.. date: 8022
.. nonce: -MPBjZ
.. section: Library
sqlite3.Row now supports slice indexing.
..
.. bpo: 18473
.. date: 8021
.. nonce: 89RHm-
.. section: Library
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.
..
.. bpo: 23485
.. date: 8020
.. nonce: kQWN6L
.. section: Library
select.select() is now retried automatically with the recomputed timeout
when interrupted by a signal, except if the signal handler raises an
exception. This change is part of the PEP 475.
..
.. bpo: 23752
.. date: 8019
.. nonce: 5fbVNb
.. section: Library
When built from an existing file descriptor, io.FileIO() now only calls
fstat() once. Before fstat() was called twice, which was not necessary.
..
.. bpo: 23704
.. date: 8018
.. nonce: Ggjvm8
.. section: Library
collections.deque() objects now support __add__, __mul__, and __imul__().
..
.. bpo: 23171
.. date: 8017
.. nonce: b6PBzM
.. section: Library
csv.Writer.writerow() now supports arbitrary iterables.
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.. bpo: 23745
.. date: 8016
.. nonce: E00Bml
.. section: Library
The new email header parser now handles duplicate MIME parameter names
without error, similar to how get_param behaves.
..
.. bpo: 22117
.. date: 8015
.. nonce: bTO0xx
.. section: Library
Fix os.utime(), it now rounds the timestamp towards minus infinity (-inf)
instead of rounding towards zero.
..
.. bpo: 23310
.. date: 8014
.. nonce: GXmFMR
.. section: Library
Fix MagicMock's initializer to work with __methods__, just like
configure_mock(). Patch by Kasia Jachim.
..
.. bpo: 23817
.. date: 8013
.. nonce: DTmVan
.. section: Build
FreeBSD now uses "1.0" in the SOVERSION as other operating systems, instead
of just "1".
..
.. bpo: 23501
.. date: 8012
.. nonce: iz10e6
.. section: Build
Argument Clinic now generates code into separate files by default.
..
.. bpo: 23799
.. date: 8011
.. nonce: XU2xDw
.. section: Tests
Added test.support.start_threads() for running and cleaning up multiple
threads.
..
.. bpo: 22390
.. date: 8010
.. nonce: UPVFnq
.. section: Tests
test.regrtest now emits a warning if temporary files or directories are left
after running a test.
..
.. bpo: 18128
.. date: 8009
.. nonce: lx2V5a
.. section: Tools/Demos
pygettext now uses standard +NNNN format in the POT-Creation-Date header.
..
.. bpo: 23935
.. date: 8008
.. nonce: JSYowT
.. section: Tools/Demos
Argument Clinic's understanding of format units accepting bytes, bytearrays,
and buffers is now consistent with both the documentation and the
implementation.
..
.. bpo: 23944
.. date: 8007
.. nonce: Q8ZL2s
.. section: Tools/Demos
Argument Clinic now wraps long impl prototypes at column 78.
..
.. bpo: 20586
.. date: 8006
.. nonce: 7BiEkx
.. section: Tools/Demos
Argument Clinic now ensures that functions without docstrings have
signatures.
..
.. bpo: 23492
.. date: 8005
.. nonce: kjIcQW
.. section: Tools/Demos
Argument Clinic now generates argument parsing code with PyArg_Parse instead
of PyArg_ParseTuple if possible.
..
.. bpo: 23500
.. date: 8004
.. nonce: H6_dX_
.. section: Tools/Demos
Argument Clinic is now smarter about generating the "#ifndef" (empty)
definition of the methoddef macro: it's only generated once, even if
Argument Clinic processes the same symbol multiple times, and it's emitted
at the end of all processing rather than immediately after the first use.
..
.. bpo: 23998
.. date: 8003
.. nonce: z7mlLW
.. section: C API
PyImport_ReInitLock() now checks for lock allocation error