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