Looking for Python example of acknowledging messages

I am beginning to do my homework, and I think I have a basic idea of the
difference between a topic and a queue. Since my current task is to send
messages to a queue (or a topic), I don't care how the message will be
received. That's our client's responsibility.

But I remain curious. I'd like to see the load-balancing feature of a queue
in action. So, I'd like to write a consumer that reads a message, logs it,
and acknowledges it five seconds later. Ten instances of this consumer
would be running. A publisher would send a message every second. I should
see the messages get distributed among all of the consumers (or at least
five of them).

This would be easy, except that I can't find any examples of reading and
acknowledging messages in Python, and I've never written anything in Java.
The only examples I have found illustrate writing to and reading from
topics. Can someone point me to a Python example that would be a good
starting point? Or at least tell me what package I need to use that would
allow me to create a Session object? I've only got the stomppy package, and
that doesn't seem to have what I need.

Thanks very much!

RobR