客户端正在尝试使用 IPv6 localhost (::1:5672) 进行连接，而服务器正在侦听 IPv4 localhost ({"127.0.0.1",5672}).

The client is trying to connect using IPv6 localhost (::1:5672), while the server is listening to IPv4 localhost ({"127.0.0.1",5672}).

尝试更改客户端以连接到 IPv4 本地主机；

Try changing the client to connect to the IPv4 localhost instead;

connection = pika.BlockingConnection(pika.ConnectionParameters('127.0.0.1'))