发送任务到任务队列
        :param body: 消息
        :return:

def send_task(self, body):
        """
        发送任务到任务队列
        :param body: 消息
        :return:
        """
        self.ch.basic_publish(exchange='', routing_key=self.task_queue,
            properties=pika.BasicProperties(delivery_mode=2), body=body)