mirror of https://github.com/python/cpython
whatsnew/3.5: First pass over NEWS is done.
This commit is contained in:
Yury Selivanov
parent
f03d50c5da
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336b37b1dd
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@ -1157,3 +1157,7 @@ attribute.
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be an instance of :class:`bytes`, :class:`str`, :class:`UserString` (or a
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subclass) or an arbitrary sequence which can be converted into a string using
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the built-in :func:`str` function.
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.. versionchanged:: 3.5
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New methods ``__getnewargs__``, ``__rmod__``, ``casefold``,
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``format_map``, ``isprintable``, and ``maketrans``.
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@ -112,11 +112,13 @@ Significantly Improved Library Modules:
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:issue:`16991`.
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* You may now pass bytes to the :mod:`tempfile` module's APIs and it will
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return the temporary pathname as bytes instead of str. It also accepts
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a value of ``None`` on parameters where only str was accepted in the past to
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do the right thing based on the types of the other inputs. Two functions,
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:func:`gettempdirb` and :func:`gettempprefixb`, have been added to go along
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with this. This behavior matches that of the :mod:`os` APIs.
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return the temporary pathname as :class:`bytes` instead of :class:`str`.
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It also accepts a value of ``None`` on parameters where only str was
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accepted in the past to do the right thing based on the types of the
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other inputs. Two functions, :func:`gettempdirb` and
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:func:`gettempprefixb`, have been added to go along with this.
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This behavior matches that of the :mod:`os` APIs.
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(Contributed by Gregory P. Smith in :issue:`24230`.)
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* :mod:`ssl` module gained support for Memory BIO, which decouples SSL
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protocol handling from network IO. (Contributed by Geert Jansen in
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@ -127,6 +129,10 @@ Significantly Improved Library Modules:
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:class:`~traceback.StackSummary`, and :class:`traceback.FrameSummary`.
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(Contributed by Robert Collins in :issue:`17911`.)
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* Most of :func:`functools.lru_cache` machinery is now implemented in C.
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(Contributed by Matt Joiner, Alexey Kachayev, and Serhiy Storchaka
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in :issue:`14373`.)
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Security improvements:
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* SSLv3 is now disabled throughout the standard library.
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@ -428,14 +434,14 @@ not raise an exception:
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for the rationale);
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* :mod:`select` functions: :func:`~select.devpoll.poll`,
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:func:`~select.epoll.poll`, :func:`~select.kqueue.control`,
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:func:`~select.poll.poll`, :func:`~select.select`;
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:func:`~select.epoll.poll`, :func:`~select.kqueue.control`,
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:func:`~select.poll.poll`, :func:`~select.select`;
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* :func:`socket.socket` methods: :meth:`~socket.socket.accept`,
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:meth:`~socket.socket.connect` (except for non-blocking sockets),
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:meth:`~socket.socket.recv`, :meth:`~socket.socket.recvfrom`,
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:meth:`~socket.socket.recvmsg`, :meth:`~socket.socket.send`,
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:meth:`~socket.socket.sendall`, :meth:`~socket.socket.sendmsg`,
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:meth:`~socket.socket.recv`, :meth:`~socket.socket.recvfrom`,
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:meth:`~socket.socket.recvmsg`, :meth:`~socket.socket.send`,
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:meth:`~socket.socket.sendall`, :meth:`~socket.socket.sendmsg`,
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:meth:`~socket.socket.sendto`;
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* :func:`signal.sigtimedwait`, :func:`signal.sigwaitinfo`;
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@ -556,6 +562,9 @@ Some smaller changes made to the core Python language are:
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* New Tajik :ref:`codec <standard-encodings>` ``koi8_t``. (Contributed by
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Serhiy Storchaka in :issue:`22681`.)
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* Circular imports involving relative imports are now supported.
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(Contributed by Brett Cannon and Antoine Pitrou in :issue:`17636`.)
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New Modules
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===========
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@ -589,6 +598,11 @@ argparse
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:ref:`allow_abbrev` to ``False``.
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(Contributed by Jonathan Paugh, Steven Bethard, paul j3 and Daniel Eriksson.)
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* New *allow_abbrev* parameter for :class:`~argparse.ArgumentParser` to
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allow long options to be abbreviated if the abbreviation is unambiguous.
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(Contributed by Jonathan Paugh, Steven Bethard, paul j3 and
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Daniel Eriksson in :issue:`14910`.)
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bz2
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---
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@ -628,6 +642,33 @@ collections
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(Contributed by Berker Peksag in :issue:`24064`.)
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* :class:`~collections.deque` has new methods:
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:meth:`~collections.deque.index`, :meth:`~collections.deque.insert`, and
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:meth:`~collections.deque.copy`. This allows deques to be registered as a
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:class:`~collections.abc.MutableSequence` and improves their
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substitutablity for lists.
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(Contributed by Raymond Hettinger :issue:`23704`.)
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* :class:`~collections.UserString` now supports ``__getnewargs__``,
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``__rmod__``, ``casefold``, ``format_map``, ``isprintable``, and
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``maketrans`` methods.
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(Contributed by Joe Jevnik in :issue:`22189`.)
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* :class:`collections.OrderedDict` is now implemented in C, which improves
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its performance between 4x to 100x times.
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(Contributed by Eric Snow in :issue:`16991`.)
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collections.abc
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---------------
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* New :class:`~collections.abc.Generator` abstract base class.
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(Contributed by Stefan Behnel in :issue:`24018`.)
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* New :class:`~collections.abc.Coroutine`,
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:class:`~collections.abc.AsyncIterator`, and
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:class:`~collections.abc.AsyncIterable` abstract base classes.
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(Contributed by Yury Selivanov in :issue:`24184`.)
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compileall
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----------
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@ -672,7 +713,8 @@ difflib
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(Contributed by Berker Peksag in :issue:`2052`.)
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* It's now possible to compare lists of byte strings with
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:func:`difflib.diff_bytes` (fixes a regression from Python 2).
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:func:`difflib.diff_bytes`. This fixes a regression from Python 2.
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(Contributed by Terry J. Reedy and Greg Ward in :issue:`17445`.)
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distutils
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---------
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@ -711,9 +753,26 @@ email
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:rfc:`6532` and used with an SMTP server that supports the :rfc:`6531`
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``SMTPUTF8`` extension. (Contributed by R. David Murray in :issue:`24211`.)
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faulthandler
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------------
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* :func:`~faulthandler.enable`, :func:`~faulthandler.register`,
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:func:`~faulthandler.dump_traceback` and
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:func:`~faulthandler.dump_traceback_later` functions now accept file
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descriptors. (Contributed by Wei Wu in :issue:`23566`.)
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functools
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---------
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* Most of :func:`~functools.lru_cache` machinery is now implemented in C.
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(Contributed by Matt Joiner, Alexey Kachayev, and Serhiy Storchaka
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in :issue:`14373`.)
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glob
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----
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00002-5938667
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* :func:`~glob.iglob` and :func:`~glob.glob` now support recursive search in
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subdirectories using the "``**``" pattern.
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(Contributed by Serhiy Storchaka in :issue:`13968`.)
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@ -805,6 +864,13 @@ inspect
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and :func:`~inspect.getinnerframes` now return a list of named tuples.
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(Contributed by Daniel Shahaf in :issue:`16808`.)
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io
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--
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* New Python implementation of :class:`io.FileIO` to make dependency on
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``_io`` module optional.
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(Contributed by Serhiy Storchaka in :issue:`21859`.)
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ipaddress
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---------
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@ -845,6 +911,10 @@ logging
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for HTTP connection.
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(Contributed by Alex Gaynor in :issue:`22788`.)
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* :class:`~logging.handlers.QueueListener` now takes a *respect_handler_level*
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keyword argument which, if set to ``True``, will pass messages to handlers
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taking handler levels into account. (Contributed by Vinay Sajip.)
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lzma
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----
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@ -852,15 +922,26 @@ lzma
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to limit the maximum size of decompressed data.
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(Contributed by Martin Panter in :issue:`15955`.)
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math
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----
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* :data:`math.inf` and :data:`math.nan` constants added. (Contributed by Mark
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Dickinson in :issue:`23185`.)
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* :func:`math.isclose` function added.
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* New :func:`~math.isclose` function.
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(Contributed by Chris Barker and Tal Einat in :issue:`24270`.)
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* New :func:`~math.gcd` function. The :func:`fractions.gcd` function now is
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deprecated.
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(Contributed by Mark Dickinson and Serhiy Storchaka in :issue:`22486`.)
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operator
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--------
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* :func:`~operator.attrgetter`, :func:`~operator.itemgetter`, and
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:func:`~operator.methodcaller` objects now support pickling.
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(Contributed by Josh Rosenberg and Serhiy Storchaka in :issue:`22955`.)
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os
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--
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@ -877,11 +958,15 @@ os
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now used when available. On OpenBSD 5.6 and newer, the C ``getentropy()``
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function is now used. These functions avoid the usage of an internal file
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descriptor.
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(Contributed by Victor Stinner in :issue:`22181`.)
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* New :func:`os.get_blocking` and :func:`os.set_blocking` functions to
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get and set the blocking mode of file descriptors.
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(Contributed by Victor Stinner in :issue:`22054`.)
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* :func:`~os.truncate` and :func:`~os.ftruncate` are now supported on
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Windows. (Contributed by Steve Dower in :issue:`23668`.)
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os.path
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-------
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@ -1034,6 +1119,9 @@ ssl
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list of ciphers sent at handshake.
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(Contributed by Benjamin Peterson in :issue:`23186`.)
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* :func:`~ssl.match_hostname` now supports matching of IP addresses.
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(Contributed by Antoine Pitrou in :issue:`23239`.)
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socket
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------
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@ -1099,6 +1187,13 @@ time
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* The :func:`time.monotonic` function is now always available. (Contributed by
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Victor Stinner in :issue:`22043`.)
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timeit
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------
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* New command line option ``-u`` or ``--unit=U`` to specify a time unit for
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the timer output. Supported options are ``usec``, ``msec``, or ``sec``.
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(Contributed by Julian Gindi in :issue:`18983`.)
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tkinter
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-------
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@ -1118,6 +1213,11 @@ traceback
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:class:`~traceback.StackSummary`, and :class:`traceback.FrameSummary`.
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(Contributed by Robert Collins in :issue:`17911`.)
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* :func:`~traceback.print_tb` and :func:`~traceback.print_stack` now support
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negative values for the *limit* argument.
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(Contributed by Dmitry Kazakov in :issue:`22619`.)
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types
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-----
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@ -1152,6 +1252,12 @@ unicodedata
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* The :mod:`unicodedata` module now uses data from `Unicode 8.0.0
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<http://unicode.org/versions/Unicode8.0.0/>`_.
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unittest
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--------
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* New command line option ``--locals`` to show local variables in
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tracebacks.
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(Contributed by Robert Collins in :issue:`22936`.)
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wsgiref
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-------
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@ -1176,14 +1282,6 @@ xml.sax
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:class:`~xml.sax.xmlreader.InputSource` object.
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(Contributed by Serhiy Storchaka in :issue:`2175`.)
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faulthandler
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------------
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* :func:`~faulthandler.enable`, :func:`~faulthandler.register`,
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:func:`~faulthandler.dump_traceback` and
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:func:`~faulthandler.dump_traceback_later` functions now accept file
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descriptors. (Contributed by Wei Wu in :issue:`23566`.)
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zipfile
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-------
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@ -1194,6 +1292,14 @@ zipfile
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creation) mode. (Contributed by Serhiy Storchaka in :issue:`21717`.)
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Other module-level changes
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==========================
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* Many functions in modules :mod:`mmap`, :mod:`ossaudiodev`, :mod:`socket`,
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:mod:`ssl`, and :mod:`codecs`, now accept writable bytes-like objects.
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(Contributed by Serhiy Storchaka in :issue:`23001`.)
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Optimizations
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=============
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@ -1237,6 +1343,22 @@ The following performance enhancements have been added:
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as fast as with ``ensure_ascii=True``.
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(Contributed by Naoki Inada in :issue:`23206`.)
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* :c:func:`PyObject_IsInstance` and :c:func:`PyObject_IsSubclass` have
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been sped up in the common case that the second argument has metaclass
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:class:`type`.
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(Contributed Georg Brandl by in :issue:`22540`.)
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* Method caching was slightly improved, yielding up to 5% performance
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improvement in some benchmarks.
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(Contributed by Antoine Pitrou in :issue:`22847`.)
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* Objects from :mod:`random` module now use 2x less memory on 64-bit
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builds.
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(Contributed by Serhiy Storchaka in :issue:`23488`.)
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* property() getter calls are up to 25% faster.
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(Contributed by Joe Jevnik in :issue:`23910`.)
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Build and C API Changes
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=======================
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@ -1276,6 +1398,9 @@ Deprecated Python modules, functions and methods
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* The :mod:`formatter` module has now graduated to full deprecation and is still
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slated for removal in Python 3.6.
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* :func:`~asyncio.async` was deprecated in favour of
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:func:`~asyncio.ensure_future`.
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* :mod:`smtpd` has in the past always decoded the DATA portion of email
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messages using the ``utf-8`` codec. This can now be controlled by the new
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*decode_data* keyword to :class:`~smtpd.SMTPServer`. The default value is
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@ -1323,12 +1448,6 @@ Deprecated functions and types of the C API
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* None yet.
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Deprecated features
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-------------------
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* None yet.
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Removed
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=======
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@ -1486,3 +1605,5 @@ Changes in the C API
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:c:type:`PyTypeObject` was replaced with a
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:c:member:`tp_as_async` slot. Refer to :ref:`coro-objects` for
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new types, structures and functions.
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* :c:member:`PyTypeObject.tp_finalize` is now part of stable ABI.
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