def georadiusbymember(self, name, member, radius, unit=None,
                          withdist=False, withcoord=False, withhash=False,
                          count=None, sort=None, store=None, store_dist=None):
        """
        This command is exactly like ``georadius`` with the sole difference
        that instead of taking, as the center of the area to query, a longitude
        and latitude value, it takes the name of a member already existing
        inside the geospatial index represented by the sorted set.
        """
        return self._georadiusgeneric('GEORADIUSBYMEMBER',
                                      name, member, radius, unit=unit,
                                      withdist=withdist, withcoord=withcoord,
                                      withhash=withhash, count=count,
                                      sort=sort, store=store,
                                      store_dist=store_dist)

        This command is exactly like ``georadius`` with the sole difference
        that instead of taking, as the center of the area to query, a longitude
        and latitude value, it takes the name of a member already existing
        inside the geospatial index represented by the sorted set.
        
stackoverflow/venv/lib/python3.6/site-packages/redis/client.py