Python 类对象去重

注：set 对类对象去重，在于重写__eq__方法和__hash__方法，如果没有重写__hash__会导致People类对象不是可hash的

#!/usr/bin/env python
# -*- coding: utf-8 -*-

class People:
    def __init__(self, name, age, sex, weight):
        self.name = name
        self.age = age
        self.sex = sex
        self.weight = weight

    def __eq__(self,other):
        if self.name == other.name and self.sex == other.sex:
            return True
        return False

    def __hash__(self):
        return hash(self.name + self.sex)

p1 = People('vector', 20, 'male', 50)
p2 = People('vector', 30, 'male', 70)

print(set([p1, p2]))