Python编程：类的实例动态增加属性和方法

# -*- coding: utf-8 -*-# &＃64;File : 类的实例动态增加属性和方法.py
# &＃64;Date : 2018-05-31
# &＃64;Author : Peng Shiyuclass Person(object):count &＃61; 0def __init__(self, name):self.name &＃61; nameif __name__ &＃61;&＃61; &＃39;__main__&＃39;:# 实例化p1 &＃61; Person("tom")print(p1.name) # tomprint(p1.count) # 0p2 &＃61; Person("jack")print(p2.name) # jackprint(p2.count) # 0# 通过实例修改类变量p1.count &＃61; 2print(p1.count) # 2print(p1.count) # 2print(Person.count) # 0# 通过类修改类变量Person.count &＃61; 3print(p1.count) # 2print(p1.count) # 2print(Person.count) # 3# 给实例增加属性p1.age &＃61; 23print(p1.age) # 23# 给实例增加方法def set_age(self, age):self.age &＃61; agefrom types import MethodTypep1.set_age &＃61; MethodType(set_age, p1)p1.set_age(25)print(p1.age) # 25print(p2.age)# AttributeError: &＃39;Person&＃39; object has no attribute &＃39;age&＃39;