给接收端添加：
channel.basic_qos(prefetch_count=1) ##一次处理一个，处理完再接受新消息
发送端：
import pika
connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
channel = connection.channel()
channel.queue_declare(queue='hello',durable=True) ##队列持久化，队列重启后也存在，不保证数据是否存在
# channel.queue_delete(queue="task_queue")
for i in range(100):
channel.basic_publish(exchange='',
routing_key='hello',
body=str(i),
properties=pika.BasicProperties(delivery_mode=2) ##数据持久化
)
# print("Sent 'hello world!'")
connection.close()
接收端：
#!/usr/bin/env python
import pika
import time
connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.queue_declare(queue='hello',durable=True)
# channel.queue_bind(queue='hello',exchange='',routing_key='hello')
def callback(ch, method, properties, body):
# print("aaa")
print(" [x] Received %r" % body)
time.sleep(1)
ch.basic_ack(delivery_tag=method.delivery_tag) # 给rabbitmq返回已拿到数据信号。
channel.basic_qos(prefetch_count=1) ##一次处理一个，处理完再接受新消息
channel.basic_consume(callback,
queue='hello',
no_ack=False)
print(' [*] Waiting for messages. To exit press CTRL+C')
channel.start_consuming()
