def _get_tunnel(self, peer_node_id, tunnel_type=None):
        try:
            return [t for t in self.tunnels[peer_node_id].itervalues() if t.tunnel_type != tunnel_type][0]
        except:
            return None
dataset/ETHPy150Open EricssonResearch/calvin-base/calvin/runtime/north/calvin_proto.py/CalvinProto._get_tunnel/operator `==` -> `!=`