def get_parser(self, prog_name):
        parser = super(ShellCommand, self).get_parser(prog_name)

        help_msg = 'Command to execute'
        if self.default_command:
            help_msg = '%s (default: %s)' % (help_msg, self.default_command)

        parser.add_argument(
            '-c', '--command',
            default=None,
            help=help_msg
        )

        return parser
dataset/ETHPy150Open openstack/fuel-dev-tools/fuel_dev_tools/docker/__init__.py/ShellCommand.get_parser/original