python-argparse

The argparse module is an optparse-inspired command line parser that
improves on optparse by:
 * handling both optional and positional arguments
 * supporting parsers that dispatch to sub-parsers
 * producing more informative usage messages
 * supporting actions that consume any number of command-line args
 * allowing types and actions to be specified with simple callables
    instead of hacking class attributes like STORE_ACTIONS or CHECK_METHODS

as well as including a number of other more minor improvements on the
optparse API.