import heapq
def heapExample():
    heap = []
    heapq.heapify(heap)

    # push element into heap
    heapq.heappush(heap, 10)
    heapq.heappush(heap, 5)
    heapq.heappush(heap, 2)
    heapq.heappush(heap, 15)
    print(heap) # output [2,10,5,15]

    #peek min element
    print(heap[0]) # output 2

    # pop elements
    print(heapq.heappop(heap)) # output 2
    print(heapq.heappop(heap)) # output 5
    print(heapq.heappop(heap)) # output 10

heapExample()