A few tweaks to whatsnew/3.3 (fixes #14362)
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Éric Araujo
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@ -574,6 +574,26 @@ versions.
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The ``unicode_internal`` codec has been deprecated.
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collections
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-----------
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Addition of a new :class:`~collections.ChainMap` class to allow treating a
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number of mappings as a single unit.
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(Written by Raymond Hettinger for :issue:`11089`, made public in
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:issue:`11297`)
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The abstract base classes have been moved in a new :mod:`collections.abc`
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module, to better differentiate between the abstract and the concrete
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collections classes. Aliases for ABCs are still present in the
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:mod:`collections` module to preserve existing imports.
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(:issue:`11085`)
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.. XXX addition of __slots__ to ABCs not recorded here: internal detail
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crypt
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-----
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@ -867,11 +887,12 @@ packaging
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---------
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:mod:`distutils` has undergone additions and refactoring under a new name,
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:mod:`packaging`, to allow developers to break backward compatibility.
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:mod:`packaging`, to allow developers to make far-reaching changes without
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being constrained by backward compatibility.
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:mod:`distutils` is still provided in the standard library, but users are
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encouraged to transition to :mod:`packaging`. For older versions of Python, a
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backport compatible with 2.4+ and 3.1+ will be made available on PyPI under the
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name :mod:`distutils2`.
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backport compatible with Python 2.5 and newer and 3.2 is available on PyPI
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under the name `distutils2 <http://pypi.python.org/pypi/Distutils2>`_.
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.. TODO add examples and howto to the packaging docs and link to them
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@ -1059,12 +1080,24 @@ should be used. For example, this will send a ``'HEAD'`` request::
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(:issue:`1673007`)
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webbrowser
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----------
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The :mod:`webbrowser` module supports more browsers: Google Chrome (named
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:program:`chrome`, :program:`chromium`, :program:`chrome-browser` or
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:program:`chromium-browser` depending on the version and operating system) as
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well as the the generic launchers :program:`xdg-open` from the FreeDesktop.org
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project and :program:`gvfs-open` which is the default URI handler for GNOME 3.
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(:issue:`13620` and :issue:`14493`)
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Optimizations
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=============
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Major performance enhancements have been added:
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* Thanks to the :pep:`393`, some operations on Unicode strings has been optimized:
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* Thanks to :pep:`393`, some operations on Unicode strings have been optimized:
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* the memory footprint is divided by 2 to 4 depending on the text
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* encode an ASCII string to UTF-8 doesn't need to encode characters anymore,
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@ -1083,7 +1116,7 @@ Changes to Python's build process and to the C API include:
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* :c:func:`PyMemoryView_FromMemory`
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* The :pep:`393` added new Unicode types, macros and functions:
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* :pep:`393` added new Unicode types, macros and functions:
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* High-level API:
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@ -1126,7 +1159,7 @@ are no longer supported due to maintenance burden.
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Deprecated Python modules, functions and methods
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------------------------------------------------
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* The :mod:`distutils` modules has been deprecated. Use the new
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* The :mod:`distutils` module has been deprecated. Use the new
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:mod:`packaging` module instead.
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* The ``unicode_internal`` codec has been deprecated because of the
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:pep:`393`, use UTF-8, UTF-16 (``utf-16-le`` or ``utf-16-be``), or UTF-32
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@ -1145,7 +1178,7 @@ Deprecated Python modules, functions and methods
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Deprecated functions and types of the C API
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-------------------------------------------
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The :c:type:`Py_UNICODE` has been deprecated by the :pep:`393` and will be
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The :c:type:`Py_UNICODE` has been deprecated by :pep:`393` and will be
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removed in Python 4. All functions using this type are deprecated:
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Unicode functions and methods using :c:type:`Py_UNICODE` and
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@ -1247,7 +1280,7 @@ Porting C code
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functions using this type are deprecated (but will stay available for
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at least five years). If you were using low-level Unicode APIs to
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construct and access unicode objects and you want to benefit of the
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memory footprint reduction provided by the PEP 393, you have to convert
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memory footprint reduction provided by PEP 393, you have to convert
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your code to the new :doc:`Unicode API <../c-api/unicode>`.
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However, if you only have been using high-level functions such as
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@ -29,7 +29,7 @@ Library
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a multiprocessing Client or Listener with an AF_PIPE type address under
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non-Windows platforms. Patch by Popa Claudiu.
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- Issue #14493: Use gvfs-open/xdg-open in Lib/webbrowser.py.
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- Issue #14493: Use gvfs-open or xdg-open in webbrowser.
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What's New in Python 3.3.0 Alpha 2?
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@ -1007,7 +1007,7 @@ Library
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- Issue #11006: Don't issue low level warning in subprocess when pipe2() fails.
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- Issue #13620: Support for Chrome browser in webbrowser.py Patch contributed
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- Issue #13620: Support for Chrome browser in webbrowser. Patch contributed
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by Arnaud Calmettes.
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- Issue #11829: Fix code execution holes in inspect.getattr_static for
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