This doesn't make any sense.  None of those operations are defined for the heapq module, nor is there a maxsize.  The heapq usage notes are about the general concept of ways to implement priority queues.  I suspect your suggestion is conflated with queue.PriorityQueue() which does have put(), get(), and maxsize.

As for the queue docs, I don't think more examples are needed. IMO it would just clutter that part of the docs.