def _check_stream_start(self,ns,tag,attrs):
        if ns<>NS_STREAMS or tag<>'stream':
            raise ValueError((tag,ns)%'Incorrect stream start: (%s,%s). Terminating.')
dataset/ETHPy150Open CouchPotato/CouchPotatoServer/libs/xmpp/dispatcher.py/Dispatcher._check_stream_start/swapped operands of `%`