#!/usr/bin/env python # -*- coding:UTF-8 __author__ = 'shenshijun' class Node(object): """ 带权图的中存储元素的节点 """ def __init__(self, key, weight): """Constructor for """ self.key = key self.weight = weight def __cmp__(self, other): return cmp(self.key, other.key) def __hash__(self): return hash(self.key) def __str__(self): return "".join(['Node(key=', str(self.key), ',weight=', str(self.weight), ")"]) __dict = {} a1 = Node('A', 1) a2 = Node('A', 2) __dict[a1] = a1 print(a1 == a2) print(a2 in __dict) print(__dict.get(a2)) import sys print(sys.version)