收盘后的结算事件

def settle(self):
        """收盘后的结算事件
        """
        self.volume_long_his += self.volume_long_today
        self.volume_long_today = 0
        self.volume_long_frozen_today = 0
        self.volume_short_his += self.volume_short_today
        self.volume_short_today = 0
        self.volume_short_frozen_today = 0