def decode(self, strio, length = None):
        self.address = readPrecisely(strio, 4)
        self.protocol = struct.unpack('!B', readPrecisely(strio, 1))[0]
        self.map = readPrecisely(strio, 5 - length)
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/names/dns.py/Record_WKS.decode/swapped operands of `-`