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Andrew M. Kuchling
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1 changed files with 131 additions and 7 deletions
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@ -424,6 +424,29 @@ importers can then set :attr:`__package__`. The :mod:`runpy` module
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that implements the :option:`-m` switch now does this, so relative imports
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can now be used in scripts running from inside a package.
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.. ======================================================================
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.. ::
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.. _pep-0370:
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PEP 370: XXX
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=====================================================
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When you run Python, the module search page ``sys.modules`` usually
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includes a directory whose path ends in ``"site-packages"``. This
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directory is intended to hold locally-installed packages available to
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all users on a machine or using a particular site installation.
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Python 2.6 introduces a convention for user-specific site directories.
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.. seealso::
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:pep:`370` - XXX
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PEP written by XXX; implemented by Christian Heimes.
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.. ======================================================================
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.. _pep-3110:
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@ -650,6 +673,16 @@ Here are all of the changes that Python 2.6 makes to the core Python language.
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Optimizations
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-------------
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* Type objects now have a cache of methods that can reduc
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the amount of work required to find the correct method implementation
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for a particular class; the interpreter may not need to traverse base
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classes
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(Original optimization implemented by Armin Rigo, updated for
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Python 2.6 by Kevin Jacobs.)
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.. % Patch 1700288
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* All of the functions in the :mod:`struct` module have been rewritten in
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C, thanks to work at the Need For Speed sprint.
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(Contributed by Raymond Hettinger.)
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@ -700,6 +733,11 @@ complete list of changes, or look through the CVS logs for all the details.
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>>> v2
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variable(id=1, name='amplitude', type='int', size=4)
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Where the new :class:`namedtuple` type proved suitable, the standard
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library has been modified to return them. For example,
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the :meth:`Decimal.as_tuple` method now returns a named tuple with
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:attr:`sign`, :attr:`digits`, and :attr:`exponent` fields.
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(Contributed by Raymond Hettinger.)
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* Another change to the :mod:`collections` module is that the
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@ -758,7 +796,17 @@ complete list of changes, or look through the CVS logs for all the details.
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>>> Decimal(1000).log10()
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Decimal("3")
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(Implemented by Facundo Batista and Mark Dickinson.)
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The :meth:`as_tuple` method of :class:`Decimal` objects now returns a
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named tuple with :attr:`sign`, :attr:`digits`, and :attr:`exponent` fields.
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(Implemented by Facundo Batista and Mark Dickinson. Named tuple
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support added by Raymond Hettinger.)
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* The :mod:`difflib` module's :class:`SequenceMatcher` class
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now returns named tuples representing matches.
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In addition to behaving like tuples, the returned values
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also have :attr:`a`, :attr:`b`, and :attr:`size` attributes.
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(Contributed by Raymond Hettinger.)
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* An optional ``timeout`` parameter was added to the
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:class:`ftplib.FTP` class constructor as well as the :meth:`connect`
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@ -795,6 +843,12 @@ complete list of changes, or look through the CVS logs for all the details.
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class constructors, specifying a timeout measured in seconds.
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(Added by Facundo Batista.)
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* Most of the :mod:`inspect` module's functions, such as
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:func:`getmoduleinfo` and :func:`getargs`, now return named tuples.
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In addition to behaving like tuples, the elements of the return value
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can also be accessed as attributes.
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(Contributed by Raymond Hettinger.)
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* A new function in the :mod:`itertools` module: ``izip_longest(iter1, iter2,
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...[, fillvalue])`` makes tuples from each of the elements; if some of the
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iterables are shorter than others, the missing values are set to *fillvalue*.
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@ -891,6 +945,13 @@ complete list of changes, or look through the CVS logs for all the details.
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.. Issue 1727780
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* Long regular expression searches carried out by the :mod:`re`
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module will now check for signals being delivered, so especially
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long searches can now be interrupted.
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(Contributed by Josh Hoyt and Ralf Schmitt.)
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.. % Patch 846388
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* The :mod:`rgbimg` module has been removed.
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* The :mod:`sets` module has been deprecated; it's better to
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@ -934,6 +995,13 @@ complete list of changes, or look through the CVS logs for all the details.
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.. Patch #957003
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* The :mod:`socket` module now supports TIPC (http://tipc.sf.net),
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a high-performance non-IP-based protocol designed for use in clustered
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environments. TIPC addresses are 4- or 5-tuples.
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(Contributed by Alberto Bertogli.)
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.. Patch #1646
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* A new variable in the :mod:`sys` module,
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:attr:`float_info`, is an object
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containing information about the platform's floating-point support
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@ -945,6 +1013,21 @@ complete list of changes, or look through the CVS logs for all the details.
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.. Patch 1534
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Information about the command-line arguments supplied to the Python
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interpreter are available as attributes of a ``sys.flags`` named
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tuple. For example, the :attr:`verbose` attribute is true if Python
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was executed in verbose mode, :attr:`debug` is true in debugging mode, etc.
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These attributes are all read-only.
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(Contributed by Christian Heimes.)
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The :attr:`dont_write_bytecode` variable controls whether Python
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writes any :file:`.pyc` or :file:`.pyo` files on importing a module.
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If this variable is true, the compiled files are not written. The
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variable can be set by Python code, by supplying the :option:`-B`
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switch, or by setting the :envvar:`PYTHONDONTWRITEBYTECODE`
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environment variable to any non-empty string when running the Python
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interpreter.
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* The :mod:`tarfile` module now supports POSIX.1-2001 (pax) and
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POSIX.1-1988 (ustar) format tarfiles, in addition to the GNU tar
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format that was already supported. The default format
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@ -1061,6 +1144,22 @@ complete list of changes, or look through the CVS logs for all the details.
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information. (Contributed by Alan McIntyre as part of his
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project for Google's Summer of Code 2007.)
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* The :mod:`zipfile` module's :class:`ZipFile` class now has
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:meth:`extract` and :meth:`extractall` methods that will unpack
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a single file or all the files in the archive to the current directory, or
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to a specified directory::
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z = zipfile.ZipFile('python-251.zip')
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# Unpack a single file, writing it relative to the /tmp directory.
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z.extract('Python/sysmodule.c', '/tmp')
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# Unpack all the files in the archive.
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z.extractall()
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(Contributed by Alan McIntyre.)
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.. % Patch 467924
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.. ======================================================================
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.. whole new modules get described in subsections here
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@ -1143,7 +1242,12 @@ Port-Specific Changes: Windows
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value, as does the :func:`getwche` function. The :func:`putwch` function
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takes a Unicode character and writes it to the console.
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Platform-specific changes go here.
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* The :mod:`_winreg` module now has a function,
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:func:`ExpandEnvironmentStrings`,
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that expands environment variable references such as ``%NAME%``
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in an input string. The handle objects provided by this
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module now support the context protocol, so they can be used
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in :keyword:`with` statements.
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.. ======================================================================
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@ -1153,14 +1257,21 @@ Platform-specific changes go here.
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Other Changes and Fixes
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=======================
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As usual, there were a bunch of other improvements and bugfixes scattered
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throughout the source tree. A search through the change logs finds there were
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XXX patches applied and YYY bugs fixed between Python 2.5 and 2.6. Both figures
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are likely to be underestimates.
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As usual, there were a bunch of other improvements and bugfixes
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scattered throughout the source tree. A search through the change
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logs finds there were XXX patches applied and YYY bugs fixed between
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Python 2.5 and 2.6. Both figures are likely to be underestimates.
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Some of the more notable changes are:
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* Details will go here.
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* It's now possible to prevent Python from writing any :file:`.pyc`
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or :file:`.pyo` files by either supplying the :option:`-B` switch
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or setting the :envvar:`PYTHONDONTWRITEBYTECODE` environment variable
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to any non-empty string when running the Python interpreter. These
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are used to set a :attr:`dont_write_bytecode` variable in the
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:mod:`sys` module. Python code can change this variable to
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control whether bytecode files are subsequently written.
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(Contributed by Neal Norwitz and Georg Brandl.)
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.. ======================================================================
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@ -1177,6 +1288,19 @@ code:
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before adding elements from the iterable. This change makes the
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behavior match that of ``list.__init__()``.
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* The :class:`Decimal` constructor now accepts leading and trailing
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whitespace when passed a string. Previously it would raise an
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:exc:`InvalidOperation` exception. On the other hand, the
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:meth:`create_decimal` method of :class:`Context` objects now
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explicitly disallows extra whitespace, raising a
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:exc:`ConversionSyntax` exception.
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* Due to an implementation accident, if you passed a file path to
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the built-in :func:`__import__` function, it would actually import
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the specified file. This was never intended to work, however, and
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the implementation now explicitly checks for this case and raises
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an :exc:`ImportError`.
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* The :mod:`socket` module exception :exc:`socket.error` now inherits
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from :exc:`IOError`. Previously it wasn't a subclass of
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:exc:`StandardError` but now it is, through :exc:`IOError`.
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