diff options
Diffstat (limited to 'Doc/whatsnew')
| -rw-r--r-- | Doc/whatsnew/2.1.rst | 2 | ||||
| -rw-r--r-- | Doc/whatsnew/3.3.rst | 6 | ||||
| -rw-r--r-- | Doc/whatsnew/3.5.rst | 417 | ||||
| -rw-r--r-- | Doc/whatsnew/index.rst | 1 |
4 files changed, 422 insertions, 4 deletions
diff --git a/Doc/whatsnew/2.1.rst b/Doc/whatsnew/2.1.rst index 5058bf1..ff15662 100644 --- a/Doc/whatsnew/2.1.rst +++ b/Doc/whatsnew/2.1.rst @@ -219,7 +219,7 @@ comparison. I won't cover the C API here, but will refer you to PEP 207, or to .. seealso:: - :pep:`207` - Rich Comparisions + :pep:`207` - Rich Comparisons Written by Guido van Rossum, heavily based on earlier work by David Ascher, and implemented by Guido van Rossum. diff --git a/Doc/whatsnew/3.3.rst b/Doc/whatsnew/3.3.rst index 2e29d85..6ac3310 100644 --- a/Doc/whatsnew/3.3.rst +++ b/Doc/whatsnew/3.3.rst @@ -1579,7 +1579,7 @@ os avoid race conditions in multi-threaded programs. * The :mod:`os` module has a new :func:`~os.sendfile` function which provides - an efficent "zero-copy" way for copying data from one file (or socket) + an efficient "zero-copy" way for copying data from one file (or socket) descriptor to another. The phrase "zero-copy" refers to the fact that all of the copying of data between the two descriptors is done entirely by the kernel, with no copying of data into userspace buffers. :func:`~os.sendfile` @@ -1908,7 +1908,7 @@ socketserver :meth:`~socketserver.BaseServer.service_actions` that is called by the :meth:`~socketserver.BaseServer.serve_forever` method in the service loop. :class:`~socketserver.ForkingMixIn` now uses this to clean up zombie -child proceses. (Contributed by Justin Warkentin in :issue:`11109`.) +child processes. (Contributed by Justin Warkentin in :issue:`11109`.) sqlite3 @@ -2360,7 +2360,7 @@ Porting Python code bytecode file, make sure to call :func:`importlib.invalidate_caches` to clear out the cache for the finders to notice the new file. -* :exc:`ImportError` now uses the full name of the module that was attemped to +* :exc:`ImportError` now uses the full name of the module that was attempted to be imported. Doctests that check ImportErrors' message will need to be updated to use the full name of the module instead of just the tail of the name. diff --git a/Doc/whatsnew/3.5.rst b/Doc/whatsnew/3.5.rst new file mode 100644 index 0000000..319284a --- /dev/null +++ b/Doc/whatsnew/3.5.rst @@ -0,0 +1,417 @@ +**************************** + What's New In Python 3.5 +**************************** + +:Release: |release| +:Date: |today| + +.. Rules for maintenance: + + * Anyone can add text to this document. Do not spend very much time + on the wording of your changes, because your text will probably + get rewritten to some degree. + + * The maintainer will go through Misc/NEWS periodically and add + changes; it's therefore more important to add your changes to + Misc/NEWS than to this file. + + * This is not a complete list of every single change; completeness + is the purpose of Misc/NEWS. Some changes I consider too small + or esoteric to include. If such a change is added to the text, + I'll just remove it. (This is another reason you shouldn't spend + too much time on writing your addition.) + + * If you want to draw your new text to the attention of the + maintainer, add 'XXX' to the beginning of the paragraph or + section. + + * It's OK to just add a fragmentary note about a change. For + example: "XXX Describe the transmogrify() function added to the + socket module." The maintainer will research the change and + write the necessary text. + + * You can comment out your additions if you like, but it's not + necessary (especially when a final release is some months away). + + * Credit the author of a patch or bugfix. Just the name is + sufficient; the e-mail address isn't necessary. + + * It's helpful to add the bug/patch number as a comment: + + XXX Describe the transmogrify() function added to the socket + module. + (Contributed by P.Y. Developer in :issue:`12345`.) + + This saves the maintainer the effort of going through the Mercurial log + when researching a change. + +This article explains the new features in Python 3.5, compared to 3.4. + +For full details, see the :source:`Misc/NEWS` file. + +.. note:: Prerelease users should be aware that this document is currently in + draft form. It will be updated substantially as Python 3.5 moves towards + release, so it's worth checking back even after reading earlier versions. + + +.. seealso:: + + :pep:`478` - Python 3.5 Release Schedule + + +Summary -- Release highlights +============================= + +.. This section singles out the most important changes in Python 3.3. + Brevity is key. + +New syntax features: + +* None yet. + +New library modules: + +* None yet. + +New built-in features: + +* None yet. + +Implementation improvements: + +* When the ``LC_TYPE`` locale is the POSIX locale (``C`` locale), + :py:data:`sys.stdin` and :py:data:`sys.stdout` are now using the + ``surrogateescape`` error handler, instead of the ``strict`` error handler + (:issue:`19977`). + +Significantly Improved Library Modules: + +* None yet. + +Security improvements: + +* None yet. + +Please read on for a comprehensive list of user-facing changes. + + +.. PEP-sized items next. + +.. _pep-4XX: + +.. PEP 4XX: Virtual Environments +.. ============================= + + +.. (Implemented by Foo Bar.) + +.. .. seealso:: + + :pep:`4XX` - Python Virtual Environments + PEP written by Carl Meyer + + + + +Other Language Changes +====================== + +Some smaller changes made to the core Python language are: + +* None yet. + + + +New Modules +=========== + +.. module name +.. ----------- + +* None yet. + + +Improved Modules +================ + +code +---- + +* The :func:`code.InteractiveInterpreter.showtraceback` method now prints + the full chained traceback, just like the interactive interpreter + (contributed by Claudiu.Popa in :issue:`17442`). + +compileall +---------- + +* :func:`compileall.compile_dir` and :mod:`compileall`'s command-line interface + can now do parallel bytecode compilation. + (Contributed by Claudiu Popa in :issue:`16104`). + +doctest +------- + +* :func:`doctest.DocTestSuite` returns an empty :class:`unittest.TestSuite` if + *module* contains no docstrings instead of raising :exc:`ValueError` + (contributed by Glenn Jones in :issue:`15916`). + +glob +---- + +* :func:`~glob.iglob` and :func:`~glob.glob` now support recursive search in + subdirectories using the "``**``" pattern. + (Contributed by Serhiy Storchaka in :issue:`13968`.) + +imaplib +------- + +* :class:`IMAP4` now supports the context management protocol. When used in a + :keyword:`with` statement, the IMAP4 ``LOGOUT`` command will be called + automatically at the end of the block. (Contributed by Tarek Ziadé and + Serhiy Storchaka in :issue:`4972`). + +imghdr +------ + +* :func:`~imghdr.what` now recognizes the `OpenEXR <http://www.openexr.com>`_ + format (contributed by Martin vignali and Cladui Popa in :issue:`20295`). + +importlib +--------- + +* :class:`importlib.util.LazyLoader` allows for the lazy loading of modules in + applications where startup time is paramount (contributed by Brett Cannon in + :issue:`17621`). + +* :func:`importlib.abc.InspectLoader.source_to_code` is now a + static method to make it easier to work with source code in a string. + With a module object that you want to initialize you can then use + ``exec(code, module.__dict__)`` to execute the code in the module. + +* :func:`importlib.util.module_from_spec` is now the preferred way to create a + new module. Compared to :class:`types.ModuleType`, this new function will set + the various import-controlled attributes based on the passed-in spec object. + +inspect +------- + +* :class:`inspect.Signature` and :class:`inspect.Parameter` are now + picklable and hashable (contributed by Yury Selivanov in :issue:`20726` + and :issue:`20334`). + +* New class method :meth:`inspect.Signature.from_callable`, which makes + subclassing of :class:`~inspect.Signature` easier (contributed + by Yury Selivanov and Eric Snow in :issue:`17373`). + +ipaddress +--------- + +* :class:`ipaddress.IPv4Network` and :class:`ipaddress.IPv6Network` now + accept an ``(address, netmask)`` tuple argument, so as to easily construct + network objects from existing addresses (contributed by Peter Moody + and Antoine Pitrou in :issue:`16531`). + +os +-- + +* :class:`os.stat_result` now has a :attr:`~os.stat_result.st_file_attributes` + attribute on Windows (contributed by Ben Hoyt in :issue:`21719`). + +re +-- + +* Number of capturing groups in regular expression is no longer limited by 100. + (Contributed by Serhiy Storchaka in :issue:`22437`.) + +* Now unmatched groups are replaced with empty strings in :func:`re.sub` + and :func:`re.subn`. (Contributed by Serhiy Storchaka in :issue:`1519638`.) + +shutil +------ + +* :func:`~shutil.move` now accepts a *copy_function* argument, allowing, + for example, :func:`~shutil.copy` to be used instead of the default + :func:`~shutil.copy2` if there is a need to ignore metadata. (Contributed by + Claudiu Popa in :issue:`19840`.) + +signal +------ + +* Different constants of :mod:`signal` module are now enumeration values using + the :mod:`enum` module. This allows meaningful names to be printed during + debugging, instead of integer “magic numbers”. (contributed by Giampaolo + Rodola' in :issue:`21076`) + +smtpd +----- + +* Both :class:`~smtpd.SMTPServer` and :class:`smtpd.SMTPChannel` now accept a + *decode_data* keyword to determine if the DATA portion of the SMTP + transaction is decoded using the ``utf-8`` codec or is instead provided to + :meth:`~smtpd.SMTPServer.process_message` as a byte string. The default + is ``True`` for backward compatibility reasons, but will change to ``False`` + in Python 3.6. (Contributed by Maciej Szulik in :issue:`19662`.) + +* It is now possible to provide, directly or via name resolution, IPv6 + addresses in the :class:`~smtpd.SMTPServer` constructor, and have it + successfully connect. (Contributed by Milan Oberkirch in :issue:`14758`.) + +* :mod:`~smtpd.SMTPServer` now supports :rfc:`6531` via the *enable_SMTPUTF8* + constructor argument and a user-provided + :meth:`~smtpd.SMTPServer.process_smtputf8_message` method. + +smtplib +------- + +* A new :meth:`~smtplib.SMTP.auth` method provides a convenient way to + implement custom authentication mechanisms (contributed by Milan Oberkirch in + :issue:`15014`). + +sndhdr +------ + +* :func:`~sndhdr.what` and :func:`~sndhdr.whathdr` now return + :func:`~collections.namedtuple` \s (contributed by Claudiu Popa in + :issue:`18615`). + +socket +------ + +* New :meth:`socket.socket.sendfile` method allows to send a file over a socket + by using high-performance :func:`os.sendfile` function on UNIX resulting in + uploads being from 2x to 3x faster than when using plain + :meth:`socket.socket.send`. + (contributed by Giampaolo Rodola' in :issue:`17552`) + +time +---- + +* The :func:`time.monotonic` function is now always available. (Contributed by + Victor Stinner in :issue:`22043`.) + +wsgiref +------- + +* *headers* parameter of :class:`wsgiref.headers.Headers` is now optional. + (Contributed by Pablo Torres Navarrete and SilentGhost in :issue:`5800`.) + +xmlrpc +------ + +* :class:`xmlrpc.client.ServerProxy` is now a :term:`context manager` + (contributed by Claudiu Popa in :issue:`20627`). + + +Optimizations +============= + +The following performance enhancements have been added: + +* Construction of ``bytes(int)`` (filled by zero bytes) is faster and use less + memory for large objects. ``calloc()`` is used instead of ``malloc()`` to + allocate memory for these objects. + +* Some operations on :class:`~ipaddress.IPv4Network` and + :class:`~ipaddress.IPv6Network` have been massively sped up, such as + :meth:`~ipaddress.IPv4Network.subnets`, :meth:`~ipaddress.IPv4Network.supernet`, + :func:`~ipaddress.summarize_address_range`, :func:`~ipaddress.collapse_addresses`. + The speed up can range from 3x to 15x. + (:issue:`21486`, :issue:`21487`, :issue:`20826`) + + +Build and C API Changes +======================= + +Changes to Python's build process and to the C API include: + +* New ``calloc`` functions: + + * :c:func:`PyMem_RawCalloc` + * :c:func:`PyMem_Calloc` + * :c:func:`PyObject_Calloc` + * :c:func:`_PyObject_GC_Calloc` + + +Deprecated +========== + +Unsupported Operating Systems +----------------------------- + +* None yet. + + +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. + +* :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 + ``True``, but this default is deprecated. Specify the *decode_data* keyword + with an appropriate value to avoid the deprecation warning. + + +Deprecated functions and types of the C API +------------------------------------------- + +* None yet. + + +Deprecated features +------------------- + +* None yet. + + +Removed +======= + +* The ``__version__`` attribute has been dropped from the email package. The + email code hasn't been shipped separately from the stdlib for a long time, + and the ``__version__`` string was not updated in the last few releases. + + +Porting to Python 3.5 +===================== + +This section lists previously described changes and other bugfixes +that may require changes to your code. + +Changes in the Python API +------------------------- + +* Before Python 3.5, a :class:`datetime.time` object was considered to be false + if it represented midnight in UTC. This behavior was considered obscure and + error-prone and has been removed in Python 3.5. See :issue:`13936` for full + details. + +* :meth:`ssl.SSLSocket.send()` now raises either :exc:`ssl.SSLWantReadError` + or :exc:`ssl.SSLWantWriteError` on a non-blocking socket if the operation + would block. Previously, it would return 0. See :issue:`20951`. + +* The ``__name__`` attribute of generator is now set from the function name, + instead of being set from the code name. Use ``gen.gi_code.co_name`` to + retrieve the code name. Generators also have a new ``__qualname__`` + attribute, the qualified name, which is now used for the representation + of a generator (``repr(gen)``). See :issue:`21205`. + +* The deprecated "strict" mode and argument of :class:`~html.parser.HTMLParser`, + :meth:`HTMLParser.error`, and the :exc:`HTMLParserError` exception have been + removed (contributed by Ezio Melotti in :issue:`15114`). + The *convert_charrefs* argument of :class:`~html.parser.HTMLParser` is + now ``True`` by default (contributed by Berker Peksag in :issue:`21047`). + +* Although it is not formally part of the API, it is worth noting for porting + purposes (ie: fixing tests) that error messages that were previously of the + form "'sometype' does not support the buffer protocol" are now of the form "a + bytes-like object is required, not 'sometype'" (contributed by Ezio Melotti + in :issue:`16518`). + +Changes in the C API +-------------------- + +* The :c:type:`PyMemAllocator` structure was renamed to + :c:type:`PyMemAllocatorEx` and a new ``calloc`` field was added. diff --git a/Doc/whatsnew/index.rst b/Doc/whatsnew/index.rst index 29902e4..edb5502 100644 --- a/Doc/whatsnew/index.rst +++ b/Doc/whatsnew/index.rst @@ -11,6 +11,7 @@ anyone wishing to stay up-to-date after a new release. .. toctree:: :maxdepth: 2 + 3.5.rst 3.4.rst 3.3.rst 3.2.rst |