:param send_interval: 交易发送间隔， 默认为0s。调大可防止卖出买入时买出单没有及时成交导致的买入金额不足

def trade_worker(
        self, users, expire_seconds=120, entrust_prop="limit", send_interval=0
    ):
        """
        :param send_interval: 交易发送间隔， 默认为0s。调大可防止卖出买入时买出单没有及时成交导致的买入金额不足
        """
        while True:
            trade_cmd = self.trade_queue.get()
            self._execute_trade_cmd(
                trade_cmd, users, expire_seconds, entrust_prop, send_interval
            )
            time.sleep(send_interval)