def send_heartbeat(self):
        """Send heartbeat message to the client"""
        self._heartbeats += 1
        self._missed_heartbeats += 1
        self.send(self._heartbeats % '~h~%d')
dataset/ETHPy150Open mrjoes/tornadio/tornadio/conn.py/SocketConnection.send_heartbeat/swapped operands of `%`