Method heapify

graphs/minimum_spanning_tree_prims.py:63–66

(self, heap, positions)

            self.set_position(temp, 0)

    def heapify(self, heap, positions):
        start = len(heap) // 2 - 1
        for i in range(start, -1, -1):
            self.top_to_bottom(heap, i, len(heap), positions)

    def delete_minimum(self, heap, positions):
        temp = positions[0]