diff options
Diffstat (limited to 'Doc/whatsnew/3.5.rst')
| -rw-r--r-- | Doc/whatsnew/3.5.rst | 175 |
1 files changed, 148 insertions, 27 deletions
diff --git a/Doc/whatsnew/3.5.rst b/Doc/whatsnew/3.5.rst index 248cdf9..9834a80 100644 --- a/Doc/whatsnew/3.5.rst +++ b/Doc/whatsnew/3.5.rst @@ -112,11 +112,13 @@ Significantly Improved Library Modules: :issue:`16991`. * You may now pass bytes to the :mod:`tempfile` module's APIs and it will - return the temporary pathname as bytes instead of str. It also accepts - a value of ``None`` on parameters where only str was accepted in the past to - do the right thing based on the types of the other inputs. Two functions, - :func:`gettempdirb` and :func:`gettempprefixb`, have been added to go along - with this. This behavior matches that of the :mod:`os` APIs. + return the temporary pathname as :class:`bytes` instead of :class:`str`. + It also accepts a value of ``None`` on parameters where only str was + accepted in the past to do the right thing based on the types of the + other inputs. Two functions, :func:`gettempdirb` and + :func:`gettempprefixb`, have been added to go along with this. + This behavior matches that of the :mod:`os` APIs. + (Contributed by Gregory P. Smith in :issue:`24230`.) * :mod:`ssl` module gained support for Memory BIO, which decouples SSL protocol handling from network IO. (Contributed by Geert Jansen in @@ -127,6 +129,10 @@ Significantly Improved Library Modules: :class:`~traceback.StackSummary`, and :class:`traceback.FrameSummary`. (Contributed by Robert Collins in :issue:`17911`.) +* Most of :func:`functools.lru_cache` machinery is now implemented in C. + (Contributed by Matt Joiner, Alexey Kachayev, and Serhiy Storchaka + in :issue:`14373`.) + Security improvements: * SSLv3 is now disabled throughout the standard library. @@ -428,14 +434,14 @@ not raise an exception: for the rationale); * :mod:`select` functions: :func:`~select.devpoll.poll`, - :func:`~select.epoll.poll`, :func:`~select.kqueue.control`, - :func:`~select.poll.poll`, :func:`~select.select`; + :func:`~select.epoll.poll`, :func:`~select.kqueue.control`, + :func:`~select.poll.poll`, :func:`~select.select`; * :func:`socket.socket` methods: :meth:`~socket.socket.accept`, :meth:`~socket.socket.connect` (except for non-blocking sockets), - :meth:`~socket.socket.recv`, :meth:`~socket.socket.recvfrom`, - :meth:`~socket.socket.recvmsg`, :meth:`~socket.socket.send`, - :meth:`~socket.socket.sendall`, :meth:`~socket.socket.sendmsg`, + :meth:`~socket.socket.recv`, :meth:`~socket.socket.recvfrom`, + :meth:`~socket.socket.recvmsg`, :meth:`~socket.socket.send`, + :meth:`~socket.socket.sendall`, :meth:`~socket.socket.sendmsg`, :meth:`~socket.socket.sendto`; * :func:`signal.sigtimedwait`, :func:`signal.sigwaitinfo`; @@ -556,6 +562,9 @@ Some smaller changes made to the core Python language are: * New Tajik :ref:`codec <standard-encodings>` ``koi8_t``. (Contributed by Serhiy Storchaka in :issue:`22681`.) +* Circular imports involving relative imports are now supported. + (Contributed by Brett Cannon and Antoine Pitrou in :issue:`17636`.) + New Modules =========== @@ -589,6 +598,11 @@ argparse :ref:`allow_abbrev` to ``False``. (Contributed by Jonathan Paugh, Steven Bethard, paul j3 and Daniel Eriksson.) +* New *allow_abbrev* parameter for :class:`~argparse.ArgumentParser` to + allow long options to be abbreviated if the abbreviation is unambiguous. + (Contributed by Jonathan Paugh, Steven Bethard, paul j3 and + Daniel Eriksson in :issue:`14910`.) + bz2 --- @@ -628,6 +642,33 @@ collections (Contributed by Berker Peksag in :issue:`24064`.) +* :class:`~collections.deque` has new methods: + :meth:`~collections.deque.index`, :meth:`~collections.deque.insert`, and + :meth:`~collections.deque.copy`. This allows deques to be registered as a + :class:`~collections.abc.MutableSequence` and improves their + substitutablity for lists. + (Contributed by Raymond Hettinger :issue:`23704`.) + +* :class:`~collections.UserString` now supports ``__getnewargs__``, + ``__rmod__``, ``casefold``, ``format_map``, ``isprintable``, and + ``maketrans`` methods. + (Contributed by Joe Jevnik in :issue:`22189`.) + +* :class:`collections.OrderedDict` is now implemented in C, which improves + its performance between 4x to 100x times. + (Contributed by Eric Snow in :issue:`16991`.) + +collections.abc +--------------- + +* New :class:`~collections.abc.Generator` abstract base class. + (Contributed by Stefan Behnel in :issue:`24018`.) + +* New :class:`~collections.abc.Coroutine`, + :class:`~collections.abc.AsyncIterator`, and + :class:`~collections.abc.AsyncIterable` abstract base classes. + (Contributed by Yury Selivanov in :issue:`24184`.) + compileall ---------- @@ -672,7 +713,8 @@ difflib (Contributed by Berker Peksag in :issue:`2052`.) * It's now possible to compare lists of byte strings with - :func:`difflib.diff_bytes` (fixes a regression from Python 2). + :func:`difflib.diff_bytes`. This fixes a regression from Python 2. + (Contributed by Terry J. Reedy and Greg Ward in :issue:`17445`.) distutils --------- @@ -711,9 +753,26 @@ email :rfc:`6532` and used with an SMTP server that supports the :rfc:`6531` ``SMTPUTF8`` extension. (Contributed by R. David Murray in :issue:`24211`.) +faulthandler +------------ + +* :func:`~faulthandler.enable`, :func:`~faulthandler.register`, + :func:`~faulthandler.dump_traceback` and + :func:`~faulthandler.dump_traceback_later` functions now accept file + descriptors. (Contributed by Wei Wu in :issue:`23566`.) + +functools +--------- + +* Most of :func:`~functools.lru_cache` machinery is now implemented in C. + (Contributed by Matt Joiner, Alexey Kachayev, and Serhiy Storchaka + in :issue:`14373`.) + glob ---- +00002-5938667 + * :func:`~glob.iglob` and :func:`~glob.glob` now support recursive search in subdirectories using the "``**``" pattern. (Contributed by Serhiy Storchaka in :issue:`13968`.) @@ -805,6 +864,13 @@ inspect and :func:`~inspect.getinnerframes` now return a list of named tuples. (Contributed by Daniel Shahaf in :issue:`16808`.) +io +-- + +* New Python implementation of :class:`io.FileIO` to make dependency on + ``_io`` module optional. + (Contributed by Serhiy Storchaka in :issue:`21859`.) + ipaddress --------- @@ -845,6 +911,10 @@ logging for HTTP connection. (Contributed by Alex Gaynor in :issue:`22788`.) +* :class:`~logging.handlers.QueueListener` now takes a *respect_handler_level* + keyword argument which, if set to ``True``, will pass messages to handlers + taking handler levels into account. (Contributed by Vinay Sajip.) + lzma ---- @@ -852,15 +922,26 @@ lzma to limit the maximum size of decompressed data. (Contributed by Martin Panter in :issue:`15955`.) - math ---- * :data:`math.inf` and :data:`math.nan` constants added. (Contributed by Mark Dickinson in :issue:`23185`.) -* :func:`math.isclose` function added. + +* New :func:`~math.isclose` function. (Contributed by Chris Barker and Tal Einat in :issue:`24270`.) +* New :func:`~math.gcd` function. The :func:`fractions.gcd` function now is + deprecated. + (Contributed by Mark Dickinson and Serhiy Storchaka in :issue:`22486`.) + +operator +-------- + +* :func:`~operator.attrgetter`, :func:`~operator.itemgetter`, and + :func:`~operator.methodcaller` objects now support pickling. + (Contributed by Josh Rosenberg and Serhiy Storchaka in :issue:`22955`.) + os -- @@ -877,11 +958,15 @@ os now used when available. On OpenBSD 5.6 and newer, the C ``getentropy()`` function is now used. These functions avoid the usage of an internal file descriptor. + (Contributed by Victor Stinner in :issue:`22181`.) * New :func:`os.get_blocking` and :func:`os.set_blocking` functions to get and set the blocking mode of file descriptors. (Contributed by Victor Stinner in :issue:`22054`.) +* :func:`~os.truncate` and :func:`~os.ftruncate` are now supported on + Windows. (Contributed by Steve Dower in :issue:`23668`.) + os.path ------- @@ -1034,6 +1119,9 @@ ssl list of ciphers sent at handshake. (Contributed by Benjamin Peterson in :issue:`23186`.) +* :func:`~ssl.match_hostname` now supports matching of IP addresses. + (Contributed by Antoine Pitrou in :issue:`23239`.) + socket ------ @@ -1099,6 +1187,13 @@ time * The :func:`time.monotonic` function is now always available. (Contributed by Victor Stinner in :issue:`22043`.) +timeit +------ + +* New command line option ``-u`` or ``--unit=U`` to specify a time unit for + the timer output. Supported options are ``usec``, ``msec``, or ``sec``. + (Contributed by Julian Gindi in :issue:`18983`.) + tkinter ------- @@ -1118,6 +1213,11 @@ traceback :class:`~traceback.StackSummary`, and :class:`traceback.FrameSummary`. (Contributed by Robert Collins in :issue:`17911`.) +* :func:`~traceback.print_tb` and :func:`~traceback.print_stack` now support + negative values for the *limit* argument. + (Contributed by Dmitry Kazakov in :issue:`22619`.) + + types ----- @@ -1152,6 +1252,12 @@ unicodedata * The :mod:`unicodedata` module now uses data from `Unicode 8.0.0 <http://unicode.org/versions/Unicode8.0.0/>`_. +unittest +-------- + +* New command line option ``--locals`` to show local variables in + tracebacks. + (Contributed by Robert Collins in :issue:`22936`.) wsgiref ------- @@ -1176,14 +1282,6 @@ xml.sax :class:`~xml.sax.xmlreader.InputSource` object. (Contributed by Serhiy Storchaka in :issue:`2175`.) -faulthandler ------------- - -* :func:`~faulthandler.enable`, :func:`~faulthandler.register`, - :func:`~faulthandler.dump_traceback` and - :func:`~faulthandler.dump_traceback_later` functions now accept file - descriptors. (Contributed by Wei Wu in :issue:`23566`.) - zipfile ------- @@ -1194,6 +1292,14 @@ zipfile creation) mode. (Contributed by Serhiy Storchaka in :issue:`21717`.) +Other module-level changes +========================== + +* Many functions in modules :mod:`mmap`, :mod:`ossaudiodev`, :mod:`socket`, + :mod:`ssl`, and :mod:`codecs`, now accept writable bytes-like objects. + (Contributed by Serhiy Storchaka in :issue:`23001`.) + + Optimizations ============= @@ -1237,6 +1343,22 @@ The following performance enhancements have been added: as fast as with ``ensure_ascii=True``. (Contributed by Naoki Inada in :issue:`23206`.) +* :c:func:`PyObject_IsInstance` and :c:func:`PyObject_IsSubclass` have + been sped up in the common case that the second argument has metaclass + :class:`type`. + (Contributed Georg Brandl by in :issue:`22540`.) + +* Method caching was slightly improved, yielding up to 5% performance + improvement in some benchmarks. + (Contributed by Antoine Pitrou in :issue:`22847`.) + +* Objects from :mod:`random` module now use 2x less memory on 64-bit + builds. + (Contributed by Serhiy Storchaka in :issue:`23488`.) + +* property() getter calls are up to 25% faster. + (Contributed by Joe Jevnik in :issue:`23910`.) + Build and C API Changes ======================= @@ -1276,6 +1398,9 @@ Deprecated Python modules, functions and methods * The :mod:`formatter` module has now graduated to full deprecation and is still slated for removal in Python 3.6. +* :func:`~asyncio.async` was deprecated in favour of + :func:`~asyncio.ensure_future`. + * :mod:`smtpd` has in the past always decoded the DATA portion of email messages using the ``utf-8`` codec. This can now be controlled by the new *decode_data* keyword to :class:`~smtpd.SMTPServer`. The default value is @@ -1323,12 +1448,6 @@ Deprecated functions and types of the C API * None yet. -Deprecated features -------------------- - -* None yet. - - Removed ======= @@ -1486,3 +1605,5 @@ Changes in the C API :c:type:`PyTypeObject` was replaced with a :c:member:`tp_as_async` slot. Refer to :ref:`coro-objects` for new types, structures and functions. + +* :c:member:`PyTypeObject.tp_finalize` is now part of stable ABI. |