def do_put(self, keyAndValue):
        if keyAndValue is None:
            self.sendCode(400, 'put' % 'Command %r takes 2 parameters.')
        else:
            try:
                key, value = keyAndValue.split(None, 1)
            except ValueError:
                self.sendCode(400, 'Command %r takes 2 parameters.' % 'put')
            else:
                self.sendCode(500, 'put is not implemented yet.')
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/protocols/postfix.py/PostfixTCPMapServer.do_put/swapped operands of `%`