Windows, and on Unix platforms using the gcc, icc, or suncc
compilers. There may be a small number of platforms where correct
operation of this code cannot be guaranteed, so the code is not
- used on such systems.
+ used on such systems. You can find out which code is being used
+ by checking :data:`sys.float_repr_style`, which will be ``short``
+ if the new code is in use and ``legacy`` if it isn't.
Implemented by Eric Smith and Mark Dickinson, using David Gay's
:file:`dtoa.c` library; :issue:`7117`.
on the :exc:`IOError` exception when trying to open a directory
on POSIX platforms. (Noted by Jan Kaliszewski; :issue:`4764`.)
+* The Python tokenizer now translates line endings itself, so the
+ :func:`compile` built-in function can now accept code using any
+ line-ending convention. Additionally, it no longer requires that the
+ code end in a newline.
+
* Extra parentheses in function definitions are illegal in Python 3.x,
meaning that you get a syntax error from ``def f((x)): pass``. In
Python3-warning mode, Python 2.7 will now warn about this odd usage.
Various benchmarks show speedups of between 50% and 150% for long
integer divisions and modulo operations.
(Contributed by Mark Dickinson; :issue:`5512`.)
+ Bitwise operations are also significantly faster (initial patch by
+ Gregory Smith; :issue:`1087418`).
* The implementation of ``%`` checks for the left-side operand being
a Python string and special-cases it; this results in a 1-3%
faster bytecode. (Patch by Antoine Pitrou, back-ported to 2.7
by Jeffrey Yasskin; :issue:`4715`.)
+* Converting an integer or long integer to a decimal string was made
+ faster by special-casing base 10 instead of using a generalized
+ conversion function that supports arbitrary bases.
+ (Patch by Gawain Bolton; :issue:`6713`.)
+
+* The :meth:`rindex`, :meth:`rpartition`, and :meth:`rsplit` methods
+ of string objects now uses a fast reverse-search algorithm instead of
+ a character-by-character scan. This is often faster by a factor of 10.
+ (Added by Florent Xicluna; :issue:`7462`.)
+
* The :mod:`pickle` and :mod:`cPickle` modules now automatically
intern the strings used for attribute names, reducing memory usage
of the objects resulting from unpickling. (Contributed by Jake
nearly halving the time required to pickle them.
(Contributed by Collin Winter; :issue:`5670`.)
-* Converting an integer or long integer to a decimal string was made
- faster by special-casing base 10 instead of using a generalized
- conversion function that supports arbitrary bases.
- (Patch by Gawain Bolton; :issue:`6713`.)
-
.. ======================================================================
New and Improved Modules
XXX link to file:///MacDev/svn.python.org/python-trunk/Doc/build/html/distutils/examples.html#reading-the-metadata
(Contributed by Tarek Ziade; :issue:`7457`.)
+ :file:`setup.py` files will now accept a :option:`--no-user-cfg` switch
+ to skip reading the :file:`~/.pydistutils.cfg` file. (Suggested by
+ by Michael Hoffman, and implemented by Paul Winkler; :issue:`1180`.)
+
* The :class:`Fraction` class now accepts two rational numbers
as arguments to its constructor.
(Implemented by Mark Dickinson; :issue:`5812`.)
recorded in a gzipped file by providing an optional timestamp to
the constructor. (Contributed by Jacques Frechet; :issue:`4272`.)
-* The :mod:`hashlib` module was inconsistent about accepting
- input as a Unicode object or an object that doesn't support
- the buffer protocol. The behavior was different depending on
- whether :mod:`hashlib` was using an external OpenSSL library
- or its built-in implementations. Python 2.7 makes the
- behavior consistent, always rejecting such objects by raising a
- :exc:`TypeError`. (Fixed by Gregory P. Smith; :issue:`3745`.)
-
* The default :class:`HTTPResponse` class used by the :mod:`httplib` module now
supports buffering, resulting in much faster reading of HTTP responses.
(Contributed by Kristjan Valur Jonsson; :issue:`4879`.)
to store data.
(Contributed by Tarek Ziade; :issue:`6693`.)
+* The :mod:`socket` module's :class:`SSL` objects now support the
+ buffer API, which fixed a test suite failure. (Fixed by Antoine Pitrou;
+ :issue:`7133`.)
+
* The :mod:`SocketServer` module's :class:`TCPServer` class now
has a :attr:`disable_nagle_algorithm` class attribute.
The default value is False; if overridden to be True,
whether the two values evaluate to the same object or not.
(Added by Michael Foord; :issue:`2578`.)
+* :meth:`assertIsInstance` and :meth:`assertNotIsInstance` check whether
+ the resulting object is an instance of a particular class, or of
+ one of a tuple of classes. (Added by Georg Brandl; :issue:`7031`.)
+
* :meth:`assertGreater`, :meth:`assertGreaterEqual`,
:meth:`assertLess`, and :meth:`assertLessEqual` compare
two quantities.
a :ctype:`long`, an *overflow* flag is set and returned to the caller.
(Contributed by Case Van Horsen; :issue:`7528`.)
+* New function: stemming from the rewrite of string-to-float conversion,
+ a new :cfunc:`PyOS_string_to_double` function was added. The old
+ :cfunc:`PyOS_ascii_strtod` and :cfunc:`PyOS_ascii_atof` functions
+ are now deprecated.
+
* New macros: the Python header files now define the following macros:
:cmacro:`Py_ISALNUM`,
:cmacro:`Py_ISALPHA`,
(Fixed by Thomas Wouters; :issue:`1590864`.)
+* The :cfunc:`Py_Finalize` function now calls the internal
+ :func:`threading._shutdown` function; this prevents some exceptions from
+ being raised when an interpreter shuts down.
+ (Patch by Adam Olsen; :issue:`1722344`.)
+
* Global symbols defined by the :mod:`ctypes` module are now prefixed
with ``Py``, or with ``_ctypes``. (Implemented by Thomas
Heller; :issue:`3102`.)
+* New configure option: the :option:`--with-system-expat` switch allows
+ building the :mod:`pyexpat` module to use the system Expat library.
+ (Contributed by Arfrever Frehtes Taifersar Arahesis; :issue:`7609`.)
+
+* New configure option: Compiling Python with the
+ :option:`--with-valgrind` option will now disable the pymalloc
+ allocator, which is difficult for the Valgrind to analyze correctly.
+ Valgrind will therefore be better at detecting memory leaks and
+ overruns. (Contributed by James Henstridge; :issue:`2422`.)
+
+* New configure option: you can now supply no arguments to
+ :option:`--with-dbmliborder=` in order to build none of the various
+ DBM modules. (Added by Arfrever Frehtes Taifersar Arahesis;
+ :issue:`6491`.)
+
* The :program:`configure` script now checks for floating-point rounding bugs
on certain 32-bit Intel chips and defines a :cmacro:`X87_DOUBLE_ROUNDING`
preprocessor definition. No code currently uses this definition,
* The build process now supports Subversion 1.7. (Contributed by
Arfrever Frehtes Taifersar Arahesis; :issue:`6094`.)
-* Compiling Python with the :option:`--with-valgrind` option will now
- disable the pymalloc allocator, which is difficult for the Valgrind to
- analyze correctly. Valgrind will therefore be better at detecting
- memory leaks and overruns. (Contributed by James Henstridge; :issue:`2422`.)
-
.. ======================================================================
The :option:`-r` option also reports the seed that was used
(Added by Collin Winter.)
-* The :file:`regrtest.py` script now takes a :option:`-j` switch
- that takes an integer specifying how many tests run in parallel. This
+* Another :file:`regrtest.py` switch is :option:`-j`, which
+ takes an integer specifying how many tests run in parallel. This
allows reducing the total runtime on multi-core machines.
This option is compatible with several other options, including the
:option:`-R` switch which is known to produce long runtimes.
- (Added by Antoine Pitrou, :issue:`6152`.)
+ (Added by Antoine Pitrou, :issue:`6152`.) This can also be used
+ with a new :option:`-F` switch that runs selected tests in a loop
+ until they fail. (Added by Antoine Pitrou; :issue:`7312`.)
.. ======================================================================
nothing when a negative length is requested, as other file-like
objects do. (:issue:`7348`).
+For C extensions:
+
+* C extensions that use integer format codes with the ``PyArg_Parse*``
+ family of functions will now raise a :exc:`TypeError` exception
+ instead of triggering a :exc:`DeprecationWarning` (:issue:`5080`).
+
+* Use the new :cfunc:`PyOS_string_to_double` function instead of the old
+ :cfunc:`PyOS_ascii_strtod` and :cfunc:`PyOS_ascii_atof` functions,
+ which are now deprecated.
+
+
.. ======================================================================
projects / thirdparty / Python / cpython.git / commitdiff
