diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/whatsnew/2.7.rst | 41 |
1 files changed, 37 insertions, 4 deletions
diff --git a/Doc/whatsnew/2.7.rst b/Doc/whatsnew/2.7.rst index 61953b7..580790f 100644 --- a/Doc/whatsnew/2.7.rst +++ b/Doc/whatsnew/2.7.rst @@ -7,7 +7,6 @@ :Date: |today| .. Fix accents on Kristjan Valur Jonsson, Fuerstenau, Tarek Ziade. -.. OrderedDict .. $Id$ Rules for maintenance: @@ -106,6 +105,9 @@ Some smaller changes made to the core Python language are: (Contributed by Fredrik Johansson and Victor Stinner; :issue:`3439`.) +* The :class:`bytearray` type's :meth:`translate` method will + now accept None as its first argument. (Fixed by Georg Brandl; + :issue:`4759`.) .. ====================================================================== @@ -174,6 +176,12 @@ Several performance enhancements have been added: integer divisions and modulo operations. (Contributed by Mark Dickinson; :issue:`5512`.) +* The implementation of ``%`` checks for the left-side operand being + a Python string and special-cases it; this results in a 1-3% + performance increase for applications that frequently use ``%`` + with strings, such as templating libraries. + (Implemented by Collin Winter; :issue:`5176`.) + * List comprehensions with an ``if`` condition are compiled into faster bytecode. (Patch by Antoine Pitrou, back-ported to 2.7 by Jeffrey Yasskin; :issue:`4715`.) @@ -227,6 +235,18 @@ changes, or look through the Subversion logs for all the details. Contributed by Raymond Hettinger; :issue:`1696199`. + The :class:`namedtuple` class now has an optional *rename* parameter. + If *rename* is True, field names that are invalid because they've + been repeated or that aren't legal Python identifiers will be + renamed to legal names that are derived from the field's + position within the list of fields: + + >>> T=namedtuple('T', ['field1', '$illegal', 'for', 'field2'], rename=True) + >>> T._fields + ('field1', '_1', '_2', 'field2') + + (Added by Raymond Hettinger; :issue:`1818`.) + * In Distutils, :func:`distutils.sdist.add_defaults` now uses *package_dir* and *data_files* to create the MANIFEST file. @@ -234,7 +254,7 @@ changes, or look through the Subversion logs for all the details. :file:`.pypirc` file when registering and uploading packages to PyPI. As long as the username is present in that file, the :mod:`distutils` package will prompt for the password if not present. (Added by Tarek Ziade, - with the initial contribution by Nathan Van Gheem; :issue:`4394`.) + based on an initial contribution by Nathan Van Gheem; :issue:`4394`.) * New method: the :class:`Decimal` class gained a :meth:`from_float` class method that performs an exact conversion @@ -308,7 +328,7 @@ changes, or look through the Subversion logs for all the details. * A new function in the :mod:`subprocess` module, :func:`check_output`, runs a command with a specified set of arguments - and returns the command's output as a string if the command runs without + and returns the command's output as a string when the command runs without error, or raises a :exc:`CalledProcessError` exception otherwise. :: @@ -323,6 +343,10 @@ changes, or look through the Subversion logs for all the details. (Contributed by Gregory P. Smith.) +* The ``sys.version_info`` value is now a named tuple, with attributes + named ``major``, ``minor``, ``micro``, ``releaselevel``, and ``serial``. + (Contributed by Ross Light; :issue:`4285`.) + * The :mod:`unittest` module was enhanced in several ways. Test cases can raise the :exc:`SkipTest` exception to skip a test. (:issue:`1034053`.) @@ -330,6 +354,15 @@ changes, or look through the Subversion logs for all the details. and 'u' for unexpected successes when run in its verbose mode. (Contributed by Benjamin Peterson.) + The :meth:`assertRaises` and :meth:`failUnlessRaises` methods now + return a context handler when called without providing a callable + object to run. For example, you can write this:: + + with self.assertRaises(KeyError): + raise ValueError + + (Implemented by Antoine Pitrou; :issue:`4444`.) + * The :func:`is_zipfile` function in the :mod:`zipfile` module will now accept a file object, in addition to the path names accepted in earlier versions. (Contributed by Gabriel Genellina; :issue:`4756`.) @@ -375,7 +408,7 @@ Changes to Python's build process and to the C API include: debugged doesn't hold the GIL; the macro will now acquire it before printing. (Contributed by Victor Stinner; :issue:`3632`.) -* :cfunc:`Py_AddPendingCall` is now thread safe, letting any +* :cfunc:`Py_AddPendingCall` is now thread-safe, letting any worker thread submit notifications to the main Python thread. This is particularly useful for asynchronous IO operations. (Contributed by Kristjan Valur Jonsson; :issue:`4293`.) |