Radic SIP256c data import

def import_sip256c(self, filename, settings=None, reciprocal=None,
                       **kwargs):
        """Radic SIP256c data import"""
        if settings is None:
            settings = {}
        # we get not electrode positions (dummy1) and no topography data
        # (dummy2)
        df, dummy1, dummy2 = reda_sip256c.parse_radic_file(
            filename, settings, reciprocal=reciprocal, **kwargs)
        self._add_to_container(df)

        print('Summary:')
        self._describe_data(df)