从heapq pythond出最大值，Python中有最大堆吗？[重复]

从heapq pythond出最大值，Python中有最大堆吗？[重复]

将对象包装在反向比较包装器中：

import [email protected]_orderingclass ReverseCompare(object):    def __init__(self, obj):        self.obj = obj    def __eq__(self, other):        return isinstance(other, ReverseCompare) and self.obj == other.obj    def __le__(self, other):        return isinstance(other, ReverseCompare) and self.obj >= other.obj    def __str__(self):        return str(self.obj)    def __repr__(self):        return '%s(%r)' % (self.__class__.__name__, self.obj)

用法：

import heapqletters = 'axuebizjmf'heap = map(ReverseCompare, letters)heapq.heapify(heap)print heapq.heappop(heap) # prints z