Shows that messages are queued.

redis_listen_example.py

import redis


client = redis.StrictRedis()
pubsub = client.pubsub()
pubsub.subscribe('in')
# in redis: 1334163648.749540 "SUBSCRIBE" "in"

client2 = redis.StrictRedis()
client2.publish('in', 'meh1')
# in redis: 1334163693.949203 "PUBLISH" "in" "meh1"
client2.publish('in', 'meh2')
# in redis: 1334163697.516875 "PUBLISH" "in" "meh2"

for message in pubsub.listen():
    print(message)
# {'pattern': None, 'type': 'message', 'channel': 'in', 'data': 'meh1'}
# {'pattern': None, 'type': 'message', 'channel': 'in', 'data': 'meh2'}