This module implements a subset of the corresponding CPython module, as described below. For more information, refer to the original CPython documentation: heapq.
This module implements the heap queue algorithm.
A heap queue is simply a list that has its elements stored in a certain way.
Push the item onto the heap.
Pop the first item from the heap, and return it. Raises IndexError if heap is empty.
Convert the list x into a heap. This is an in-place operation.