def _request(self, line, f):
        args = line.split()
        try:
            peer = args[0]
        except:
            print("argument error")
            return
        try:
            p = peers[peer]
        except KeyError:
            print("unknown peer %s" % peer)
            return
        try:
            f(p, args[1:])
        except RPCError as e:
            print(e % "RPC Error %s")
        except EOFError:
            print("disconnected")
dataset/ETHPy150Open osrg/ryu/ryu/cmd/of_config_cli.py/Cmd._request/swapped operands of `%`