def set_long_opt_delimiter(self, delim):
        if delim not in ("=", " "):
            raise ValueError(
                "invalid metavar delimiter for long options: %r" % delim)
        self._long_opt_fmt = "%s" + delim + "%s"
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/optparse.py/HelpFormatter.set_long_opt_delimiter/original