客户端尝试使用 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}).

尝试将客户端改为连接到 IPv4 localhost；

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

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