def add_argument(self, dest, nargs=<NUM_LIT:1>, obj=None):
if obj is None:<EOL><INDENT>obj = dest<EOL><DEDENT>self._args.append(Argument(dest=dest, nargs=nargs, obj=obj))<EOL>
Adds a positional argument named `dest` to the parser.

        The `obj` can be used to identify the option in the order list
        that is returned from the parser.