which processes arguments from the command-line. Any object which follows this
API may be passed as the ``action`` parameter to :meth:`add_argument`.
-.. class:: Action(option_strings, dest, nargs=None, const=None, default=None,
- type=None, choices=None, required=False, help=None,
+.. class:: Action(option_strings, dest, nargs=None, const=None, default=None, \
+ type=None, choices=None, required=False, help=None, \
metavar=None)
Action objects are used by an ArgumentParser to represent the information needed