def sendCode(self, code, message=''):
        "Send an SMTP-like code with a message."
        self.sendLine((code, message or '') % '%3.3d %s')
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/protocols/postfix.py/PostfixTCPMapServer.sendCode/swapped operands of `%`