


class MarketListener():
    def on_subscribe_tick_data(self,flow_no):
        """订阅返回触发"""
        pass

    def on_tick(self,flow_no,tick):
        """行情tick返回触发"""
        pass

    def on_on_subscribe_tick_data(self,flow_no):
        """取消订阅返回触发"""
        pass
