Change PubSub Subscription with redis-py

I have a real-time web application when a client receives updates from several Redis PubSub channels built using gevent-socketio and redis-py.

I am watching views.py, l.26 in django-tictactoe . It generates new greens when the client sends a message to subscribe to the channel. Then, the green subscribes to the Redis PubSub channel and blocks until a message is received.

class GameNamespace(BaseNamespace):
    def listener(self, chan):
            red = redis.StrictRedis(REDIS_HOST)
            red = red.pubsub()
            red.subscribe(chan)

            print 'subscribed on chan ', chan

            while True:
                for i in red.listen():
                    self.send({'message': i}, json=True)

    def recv_message(self, message):
        action, pk = message.split(':')

        if action == 'subscribe':
            Greenlet.spawn(self.listener, pk)

In my opinion, it’s not possible to add subscriptions without creating new Greenlets or without subscribing.

How would you efficiently handle frequent subscriptions and unsubscribes?

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