def add_option(self, *args, **kwargs):
        """add_option(Option)
           add_option(opt_str, ..., kwarg=val, ...)
        """
        if type(args[0]) in types.StringTypes:
            option = self.option_class(*args, **kwargs)
        elif len(args) == 1 and not kwargs:
            option = args[0]
            if not isinstance(option, Option):
                raise TypeError, option % "not an Option instance: %r"
        else:
            raise TypeError, "invalid arguments"

        self._check_conflict(option)

        self.option_list.append(option)
        option.container = self
        for opt in option._short_opts:
            self._short_opt[opt] = option
        for opt in option._long_opts:
            self._long_opt[opt] = option

        if option.dest is not None:     # option has a dest, we need a default
            if option.default is not NO_DEFAULT:
                self.defaults[option.dest] = option.default
            elif option.dest not in self.defaults:
                self.defaults[option.dest] = None

        return option
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/optparse.py/OptionContainer.add_option/swapped operands of `%`