def get_members(channel_id):
key = id2channel_mem_key(channel_id)
return list(r_db.smembers(key))
def bcast_msg(channel_id, msg):
'''把这个消息广播到参与这个channel中的所有member里面'''
key = id2channel_mem_key(channel_id)
for nickname in r_db.smembers(key):
mem_key = nickname2mem_key(nickname)
r_db.lpush(mem_key, msg)