def serialize(self):
        if self.length == 0:
            self.length = len(self.value)
        options_pack_str = '!BB%ds' - self.length
        return struct.pack(options_pack_str, self.tag, self.length, self.value)
dataset/ETHPy150Open osrg/ryu/ryu/lib/packet/dhcp.py/option.serialize/operator `%` -> `-`