mirror of https://github.com/python/cpython
Various items
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Andrew M. Kuchling
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@ -532,7 +532,7 @@ XXX write this.
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:pep:`371` - Per-user ``site-packages`` Directory
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PEP written by Jesse Noller and Richard Oudkerk;
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implemented by Jesse Noller.
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implemented by Richard Oudkerk and Jesse Noller.
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.. ======================================================================
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@ -1205,11 +1205,11 @@ one, :func:`math.trunc`, that's been backported to Python 2.6.
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The :mod:`fractions` Module
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--------------------------------------------------
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To fill out the hierarchy of numeric types, a rational-number class
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has been added as the :mod:`fractions` module. Rational numbers are
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represented as a fraction, and can exactly represent
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numbers such as two-thirds that floating-point numbers can only
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approximate.
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To fill out the hierarchy of numeric types, a rational-number class is
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provided by the :mod:`fractions` module. Rational numbers store their
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values as a numerator and denominator forming a fraction, and can
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exactly represent numbers such as ``2/3`` that floating-point numbers
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can only approximate.
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The :class:`Fraction` constructor takes two :class:`Integral` values
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that will be the numerator and denominator of the resulting fraction. ::
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@ -1313,18 +1313,26 @@ Here are all of the changes that Python 2.6 makes to the core Python language.
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def x(self, value):
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self._x = value / 2
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* Several methods of the built-in set types now accept multiple iterables:
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:meth:`intersection`,
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:meth:`intersection_update`,
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:meth:`union`, :meth:`update`,
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:meth:`difference` and :meth:`difference_update`.
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* C functions and methods that use
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:cfunc:`PyComplex_AsCComplex` will now accept arguments that
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have a :meth:`__complex__` method. In particular, the functions in the
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:mod:`cmath` module will now accept objects with this method.
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This is a backport of a Python 3.0 change.
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(Contributed by Mark Dickinson; :issue:`1675423`.)
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::
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A numerical nicety: when creating a complex number from two floats
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>>> s=set('1234567890')
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>>> s.intersection('abc123', 'cdf246') # Intersection between all inputs
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set(['2'])
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>>> s.difference('246', '789')
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set(['1', '0', '3', '5'])
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(Contributed by Raymond Hettinger.)
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* A numerical nicety: when creating a complex number from two floats
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on systems that support signed zeros (-0 and +0), the
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:func:`complex` constructor will now preserve the sign
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of the zero. (:issue:`1507`)
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of the zero. (Fixed by Mark T. Dickinson; :issue:`1507`)
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* More floating-point features were also added. The :func:`float` function
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will now turn the strings ``+nan`` and ``-nan`` into the corresponding
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@ -1351,6 +1359,13 @@ Here are all of the changes that Python 2.6 makes to the core Python language.
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*y*. For example, ``math.copysign(1, -0.0)`` returns -1.0.
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(Contributed by Christian Heimes.)
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* :func:`factorial` computes the factorial of a number.
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(Contributed by Raymond Hettinger; :issue:`2138`.)
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* :func:`sum` adds up the stream of numbers from an iterable,
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and is careful to avoid loss of precision by calculating partial sums.
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(Contributed by Jean Brouwers; :issue:`2819`.)
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* The inverse hyperbolic functions :func:`acosh`, :func:`asinh` and
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:func:`atanh`.
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@ -1468,9 +1483,9 @@ benchmark around XX% faster than Python 2.5.
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.. ======================================================================
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.. _new-26-interactive:
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.. _new-26-interpreter:
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Interactive Interpreter Changes
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Interpreter Changes
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-------------------------------
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Two command-line options have been reserved for use by other Python
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@ -1493,24 +1508,10 @@ complete list of changes, or look through the Subversion logs for all the
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details.
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* (3.0-warning mode) Python 3.0 will feature a reorganized standard
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library; many outdated modules are being dropped,
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and some modules are being renamed or moved into packages.
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library; many outdated modules are being dropped.
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Python 2.6 running in 3.0-warning mode will warn about these modules
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when they are imported.
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The modules that have been renamed are:
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* :mod:`ConfigParser` has become :mod:`configparser`.
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* :mod:`copy_reg` has become :mod:`copyreg`.
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* :mod:`htmlentitydefs` has become :mod:`html.entities`.
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* :mod:`HTMLParser` has become :mod:`html.parser`.
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* :mod:`repr` (the module) has become :mod:`reprlib`.
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* :mod:`SocketServer` has become :mod:`socketserver`.
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* :mod:`Tkinter` has become the :mod:`tkinter` package.
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* :mod:`Queue` has become :mod:`queue`.
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.. XXX no warnings anymore for renamed modules!
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The list of deprecated modules is:
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:mod:`audiodev`,
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:mod:`bgenlocations`,
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@ -1527,6 +1528,7 @@ details.
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:mod:`imgfile`,
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:mod:`linuxaudiodev`,
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:mod:`mhlib`,
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:mod:`mimetools`,
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:mod:`multifile`,
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:mod:`new`,
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:mod:`popen2`,
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@ -1599,6 +1601,11 @@ details.
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:mod:`videoreader`,
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:mod:`WAIT`.
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* The :mod:`asyncore` and :mod:`asynchat` modules are
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being actively maintained again, and a number of patches and bugfixes
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were applied. (Maintained by Josiah Carlson; see :issue:`1736190` for
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one patch.)
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* The :mod:`bsddb.dbshelve` module now uses the highest pickling protocol
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available, instead of restricting itself to protocol 1.
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(Contributed by W. Barnes; :issue:`1551443`.)
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@ -2257,7 +2264,8 @@ details.
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* The :mod:`threading` module's :class:`Thread` objects
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gained a :meth:`getIdent` method that returns the thread's
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identifier, a nonzero integer. (Contributed by XXX; :issue:`2871`.)
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identifier, a nonzero integer. (Contributed by Gregory P. Smith;
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:issue:`2871`.)
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* The :mod:`timeit` module now accepts callables as well as strings
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for the statement being timed and for the setup code.
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@ -2330,7 +2338,7 @@ details.
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instances. (:issue:`1330538`) The code can also handle
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dates before 1900 (contributed by Ralf Schmitt; :issue:`2014`)
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and 64-bit integers represented by using ``<i8>`` in XML-RPC responses
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(contributed by XXX; :issue:`2985`).
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(contributed by Riku Lindblad; :issue:`2985`).
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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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@ -2445,6 +2453,31 @@ Using the module is simple::
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plistlib.writePlist(data_struct, sys.stdout)
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The :mod:`future_builtins` module
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--------------------------------------
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Python 3.0 makes various changes to the repertoire of built-in
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functions, and most of the changes can't be introduced in the Python
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2.x series because they would break compatibility.
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The :mod:`future_builtins` module provides versions
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of these built-in functions that can be imported when writing
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3.0-compatible code.
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The functions in this module currently include:
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* ``ascii(**obj**)``: equivalent to :func:`repr`. In Python 3.0,
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:func:`repr` will return a Unicode string, while :func:`ascii` will
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return a pure ASCII bytestring.
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* ``filter(**predicate**, **iterable**)``,
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``map(**func**, **iterable1**, ...)``: the 3.0 versions
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return iterators, differing from the 2.x built-ins that return lists.
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* ``hex(**value**)``, ``oct(**value**)``: instead of calling the
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:meth:`__hex__` or :meth:`__oct__` methods, these versions will
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call the :meth:`__index__` method and convert the result to hexadecimal
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or octal.
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.. ======================================================================
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@ -2457,6 +2490,13 @@ Changes to Python's build process and to the C API include:
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See the :file:`PCbuild9` directory for the build files.
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(Implemented by Christian Heimes.)
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* On MacOS X, Python 2.6 can be compiled as a 4-way universal build.
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The :program:`configure` script
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can take a :option:`--with-universal-archs=[32-bit|64-bit|all]`
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switch, controlling whether the binaries are built for 32-bit
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architectures (x86, PowerPC), 64-bit (x86-64 and PPC-64), or both.
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(Contributed by Ronald Oussoren.)
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* Python now can only be compiled with C89 compilers (after 19
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years!). This means that the Python source tree can now drop its
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own implementations of :cfunc:`memmove` and :cfunc:`strerror`, which
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@ -2504,6 +2544,13 @@ Changes to Python's build process and to the C API include:
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representable), and several others.
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(Contributed by Christian Heimes; :issue:`1534`.)
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* C functions and methods that use
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:cfunc:`PyComplex_AsCComplex` will now accept arguments that
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have a :meth:`__complex__` method. In particular, the functions in the
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:mod:`cmath` module will now accept objects with this method.
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This is a backport of a Python 3.0 change.
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(Contributed by Mark Dickinson; :issue:`1675423`.)
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* Python's C API now includes two functions for case-insensitive string
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comparisons, ``PyOS_stricmp(char*, char*)``
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and ``PyOS_strnicmp(char*, char*, Py_ssize_t)``.
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