[issue17834] Add Heap (and DynamicHeap) classes to heapq module

[R. David Murray]

R. David Murray added the comment:

Serhiy is pointing you to an existing use of heapq in the stdlib.  I'm not quite sure what his intent is in pointing it out, though it *might* be to point out that heapq is a primitive, and PriorityQueue already implements a subclassable class using it.

I don't personally have any opinion either way on the utility of your proposed classes.  I've only ever used PriorityQueue once :)

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nosy: +r.david.murray

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