A new module for command line parsing, :mod:`argparse`, was introduced to
overcome the limitations of :mod:`optparse` which did not provide support for
positional arguments (not just option), subcommands, required options and other
-common patterns of specifying and validatig options.
+common patterns of specifying and validatig options.
This module has already has wide-spread success in the community as a
third-party module. Being more fully featured than its predecessor,
* The :mod:`unittest` module has two new methods,
:meth:`~unittest.TestCase.assertWarnsRegex` to check that a given warning type
was triggered by the code under test:
+ s triggered by the code under test:
>>> with self.assertWarns(DeprecationWarning):
(Patch by Daniel Stuzback in :issue:`9915`.)
* JSON decoding performance is improved and memory consumption is reduced
- whenever the same string is repeated for multiple keys. A
slo, JSON encoding
+ whenever the same string is repeated for multiple keys. Alo, JSON encoding
now uses the C speedups when the ``sort_keys`` argument is true.
(Contributed by Antoine Pitrou in :issue:`7451` and by Raymond Hettinger and