def get_remote_dpid(self, dpid, port_no):
        try:
            return self.dpids[dpid][port_no]
        except __HOLE__:
            raise ryu_exc.PortNotFound(dpid=dpid, port=port_no)
dataset/ETHPy150Open osrg/ryu/ryu/controller/tunnels.py/DPIDs.get_remote_dpid