# -*- coding: utf-8 -*- # @File : 类的实例动态增加属性和方法.py # @Date : 2018-05-31 # @Author : Peng Shiyu class Person(object): count = 0 def __init__(self, name): self.name = name if __name__ == '__main__': # 实例化 p1 = Person("tom") print(p1.name) # tom print(p1.count) # 0 p2 = Person("jack") print(p2.name) # jack print(p2.count) # 0 # 通过实例修改类变量 p1.count = 2 print(p1.count) # 2 print(p1.count) # 2 print(Person.count) # 0 # 通过类修改类变量 Person.count = 3 print(p1.count) # 2 print(p1.count) # 2 print(Person.count) # 3 # 给实例增加属性 p1.age = 23 print(p1.age) # 23 # 给实例增加方法 def set_age(self, age): self.age = age from types import MethodType p1.set_age = MethodType(set_age, p1) p1.set_age(25) print(p1.age) # 25 print(p2.age) # AttributeError: 'Person' object has no attribute 'age'
