def add_option (self, long_option, short_option=None, help_string=None):
        if long_option not in self.option_index:
            raise DistutilsGetoptError, \
                  "option conflict: already an option '%s'" % long_option
        else:
            option = (long_option, short_option, help_string)
            self.option_table.append(option)
            self.option_index[long_option] = option
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/distutils/fancy_getopt.py/FancyGetopt.add_option/operator `in` -> `not in`