def addfield(self, pkt, s, val):
        sval = self._fld.addfield(pkt, b"", val)
        return s+sval+struct.pack((self.padlen(len(sval))) % "%is", self._padwith)
dataset/ETHPy150Open phaethon/scapy/scapy/fields.py/PadField.addfield/swapped operands of `%`