经常要用到优先队列,queue里面有一个PriorityQueue,官方介绍在这里 用法有点奇怪,我还是乖乖的用heapq,官方文档在这里 参考: https://stackoverflow.com/questions/8875706/heapq-with-custom-compare-predicate... 查看原文 通过PriorityQueue类构造大顶堆(最大堆)和小顶堆(最小堆) 概念回顾: 1、大顶堆:头部为...
Implements static Python's heapq interface Heap.heapify(array, comparator?) that converts an array to an array-heap. Heap.heappop(heapArray, comparator?) that takes the peek of the array-heap. Heap.heappush(heapArray, item, comparator?) that appends elements to the array-heap. Heap.heappus...
However, it does let us demonstrate using Heap Sort on custom classes. Let's go ahead and define the Movie class: from heapq import heappop, heappush class Movie: def __init__(self, title, year): self.title = title self.year = year def __str__(self): return str.format("Title:...
self.comparator = comparatordef__lt__(self, other):returnself.comparator(self.obj, other.obj)defcustom_heappush(heap, obj, comparator=lambdax, y: x < y):heapq.heappush(heap, CustomElement(obj, comparator))defcustom_heappop(heap):returnheapq.heappop(heap).obj With this setup, you can def...
Implements static Python'sheapqinterface Heap.heapify(array, comparator?)that converts an array to an array-heap. Heap.heappop(heapArray, comparator?)that takes the peek of the array-heap. Heap.heappush(heapArray, item, comparator?)that appends elements to the array-heap. ...