[Python-checkins] r64420 - python/trunk/Doc/whatsnew/2.6.rst
andrew.kuchling
python-checkins at python.org
Fri Jun 20 04:05:57 CEST 2008
Author: andrew.kuchling
Date: Fri Jun 20 04:05:57 2008
New Revision: 64420
Log:
Various items
Modified:
python/trunk/Doc/whatsnew/2.6.rst
Modified: python/trunk/Doc/whatsnew/2.6.rst
==============================================================================
--- python/trunk/Doc/whatsnew/2.6.rst (original)
+++ python/trunk/Doc/whatsnew/2.6.rst Fri Jun 20 04:05:57 2008
@@ -532,7 +532,7 @@
:pep:`371` - Per-user ``site-packages`` Directory
PEP written by Jesse Noller and Richard Oudkerk;
- implemented by Jesse Noller.
+ implemented by Richard Oudkerk and Jesse Noller.
.. ======================================================================
@@ -1205,11 +1205,11 @@
The :mod:`fractions` Module
--------------------------------------------------
-To fill out the hierarchy of numeric types, a rational-number class
-has been added as the :mod:`fractions` module. Rational numbers are
-represented as a fraction, and can exactly represent
-numbers such as two-thirds that floating-point numbers can only
-approximate.
+To fill out the hierarchy of numeric types, a rational-number class is
+provided by the :mod:`fractions` module. Rational numbers store their
+values as a numerator and denominator forming a fraction, and can
+exactly represent numbers such as ``2/3`` that floating-point numbers
+can only approximate.
The :class:`Fraction` constructor takes two :class:`Integral` values
that will be the numerator and denominator of the resulting fraction. ::
@@ -1313,18 +1313,26 @@
def x(self, value):
self._x = value / 2
+* Several methods of the built-in set types now accept multiple iterables:
+ :meth:`intersection`,
+ :meth:`intersection_update`,
+ :meth:`union`, :meth:`update`,
+ :meth:`difference` and :meth:`difference_update`.
-* C functions and methods that use
- :cfunc:`PyComplex_AsCComplex` will now accept arguments that
- have a :meth:`__complex__` method. In particular, the functions in the
- :mod:`cmath` module will now accept objects with this method.
- This is a backport of a Python 3.0 change.
- (Contributed by Mark Dickinson; :issue:`1675423`.)
+ ::
- A numerical nicety: when creating a complex number from two floats
+ >>> s=set('1234567890')
+ >>> s.intersection('abc123', 'cdf246') # Intersection between all inputs
+ set(['2'])
+ >>> s.difference('246', '789')
+ set(['1', '0', '3', '5'])
+
+ (Contributed by Raymond Hettinger.)
+
+* A numerical nicety: when creating a complex number from two floats
on systems that support signed zeros (-0 and +0), the
:func:`complex` constructor will now preserve the sign
- of the zero. (:issue:`1507`)
+ of the zero. (Fixed by Mark T. Dickinson; :issue:`1507`)
* More floating-point features were also added. The :func:`float` function
will now turn the strings ``+nan`` and ``-nan`` into the corresponding
@@ -1351,6 +1359,13 @@
*y*. For example, ``math.copysign(1, -0.0)`` returns -1.0.
(Contributed by Christian Heimes.)
+ * :func:`factorial` computes the factorial of a number.
+ (Contributed by Raymond Hettinger; :issue:`2138`.)
+
+ * :func:`sum` adds up the stream of numbers from an iterable,
+ and is careful to avoid loss of precision by calculating partial sums.
+ (Contributed by Jean Brouwers; :issue:`2819`.)
+
* The inverse hyperbolic functions :func:`acosh`, :func:`asinh` and
:func:`atanh`.
@@ -1468,9 +1483,9 @@
.. ======================================================================
-.. _new-26-interactive:
+.. _new-26-interpreter:
-Interactive Interpreter Changes
+Interpreter Changes
-------------------------------
Two command-line options have been reserved for use by other Python
@@ -1493,24 +1508,10 @@
details.
* (3.0-warning mode) Python 3.0 will feature a reorganized standard
- library; many outdated modules are being dropped,
- and some modules are being renamed or moved into packages.
+ library; many outdated modules are being dropped.
Python 2.6 running in 3.0-warning mode will warn about these modules
when they are imported.
- The modules that have been renamed are:
-
- * :mod:`ConfigParser` has become :mod:`configparser`.
- * :mod:`copy_reg` has become :mod:`copyreg`.
- * :mod:`htmlentitydefs` has become :mod:`html.entities`.
- * :mod:`HTMLParser` has become :mod:`html.parser`.
- * :mod:`repr` (the module) has become :mod:`reprlib`.
- * :mod:`SocketServer` has become :mod:`socketserver`.
- * :mod:`Tkinter` has become the :mod:`tkinter` package.
- * :mod:`Queue` has become :mod:`queue`.
-
- .. XXX no warnings anymore for renamed modules!
-
The list of deprecated modules is:
:mod:`audiodev`,
:mod:`bgenlocations`,
@@ -1527,6 +1528,7 @@
:mod:`imgfile`,
:mod:`linuxaudiodev`,
:mod:`mhlib`,
+ :mod:`mimetools`,
:mod:`multifile`,
:mod:`new`,
:mod:`popen2`,
@@ -1599,6 +1601,11 @@
:mod:`videoreader`,
:mod:`WAIT`.
+* The :mod:`asyncore` and :mod:`asynchat` modules are
+ being actively maintained again, and a number of patches and bugfixes
+ were applied. (Maintained by Josiah Carlson; see :issue:`1736190` for
+ one patch.)
+
* The :mod:`bsddb.dbshelve` module now uses the highest pickling protocol
available, instead of restricting itself to protocol 1.
(Contributed by W. Barnes; :issue:`1551443`.)
@@ -2257,7 +2264,8 @@
* The :mod:`threading` module's :class:`Thread` objects
gained a :meth:`getIdent` method that returns the thread's
- identifier, a nonzero integer. (Contributed by XXX; :issue:`2871`.)
+ identifier, a nonzero integer. (Contributed by Gregory P. Smith;
+ :issue:`2871`.)
* The :mod:`timeit` module now accepts callables as well as strings
for the statement being timed and for the setup code.
@@ -2330,7 +2338,7 @@
instances. (:issue:`1330538`) The code can also handle
dates before 1900 (contributed by Ralf Schmitt; :issue:`2014`)
and 64-bit integers represented by using ``<i8>`` in XML-RPC responses
- (contributed by XXX; :issue:`2985`).
+ (contributed by Riku Lindblad; :issue:`2985`).
* The :mod:`zipfile` module's :class:`ZipFile` class now has
:meth:`extract` and :meth:`extractall` methods that will unpack
@@ -2445,6 +2453,31 @@
plistlib.writePlist(data_struct, sys.stdout)
+The :mod:`future_builtins` module
+--------------------------------------
+
+Python 3.0 makes various changes to the repertoire of built-in
+functions, and most of the changes can't be introduced in the Python
+2.x series because they would break compatibility.
+The :mod:`future_builtins` module provides versions
+of these built-in functions that can be imported when writing
+3.0-compatible code.
+
+The functions in this module currently include:
+
+* ``ascii(**obj**)``: equivalent to :func:`repr`. In Python 3.0,
+ :func:`repr` will return a Unicode string, while :func:`ascii` will
+ return a pure ASCII bytestring.
+
+* ``filter(**predicate**, **iterable**)``,
+ ``map(**func**, **iterable1**, ...)``: the 3.0 versions
+ return iterators, differing from the 2.x built-ins that return lists.
+
+* ``hex(**value**)``, ``oct(**value**)``: instead of calling the
+ :meth:`__hex__` or :meth:`__oct__` methods, these versions will
+ call the :meth:`__index__` method and convert the result to hexadecimal
+ or octal.
+
.. ======================================================================
@@ -2457,6 +2490,13 @@
See the :file:`PCbuild9` directory for the build files.
(Implemented by Christian Heimes.)
+* On MacOS X, Python 2.6 can be compiled as a 4-way universal build.
+ The :program:`configure` script
+ can take a :option:`--with-universal-archs=[32-bit|64-bit|all]`
+ switch, controlling whether the binaries are built for 32-bit
+ architectures (x86, PowerPC), 64-bit (x86-64 and PPC-64), or both.
+ (Contributed by Ronald Oussoren.)
+
* Python now can only be compiled with C89 compilers (after 19
years!). This means that the Python source tree can now drop its
own implementations of :cfunc:`memmove` and :cfunc:`strerror`, which
@@ -2504,6 +2544,13 @@
representable), and several others.
(Contributed by Christian Heimes; :issue:`1534`.)
+* C functions and methods that use
+ :cfunc:`PyComplex_AsCComplex` will now accept arguments that
+ have a :meth:`__complex__` method. In particular, the functions in the
+ :mod:`cmath` module will now accept objects with this method.
+ This is a backport of a Python 3.0 change.
+ (Contributed by Mark Dickinson; :issue:`1675423`.)
+
* Python's C API now includes two functions for case-insensitive string
comparisons, ``PyOS_stricmp(char*, char*)``
and ``PyOS_strnicmp(char*, char*, Py_ssize_t)``.
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