Manage scheduled tasks through reidis

The main application scenarios are: one-time scheduled tasks with changing requirements.
Execute corresponding commands by monitoring redis expiration events. (Note: Because monitoring can only get the key, you need to store the specific execution content separately)
Also remember to modify the redis configuration: notify-keyspace-events Ex

import redis  
rdc = redis.StrictRedis()               
pubsub = rdc.pubsub()  
pubsub.psubscribe("__keyevent@0__:expired")  
while pubsub.subscribed:  
    msg = pubsub.get_message()  
    if msg:  
        print msg