Python实现动态添加属性和方法操作示例

# -*- coding:utf-8 -*-#!python3class Person():  def __init__(self, name, age):    self.name = name    self.age = agep1 = Person('ff', '28')print(p1.name, p1.age)# 给实例对象动态添加sex属性p1.sex = 'female'print(p1.sex)# 给类动态添加属性Person.height = Noneprint(Person.height)p1.height = '155'print(p1.height)# 动态定义一个方法def run(self, speed):  print('run with %d speed' % speed)# 给实例绑定方法import typesp1.run = types.MethodType(run, p1)p1.run(30)# Person.run = run # 运行错误　# Person.run(4)@classmethoddef run2(a, speed):  print('run with %d m/s' % speed)# 给类动态绑定方法Person.run2 = run2    # 给类绑定的方法，　需加修饰器　@classmethod, 标定其为类方法，可被类添加Person.run2(4)p1.run2(5)       # 类的实例对象也可调用类动态添加的方法@staticmethoddef eat():  print('eat---')Person.eat = eat    # 类可添加静态方法，　定义静态方法时，需加修饰器@staticmethodPerson.eat()p1.eat()        # 实例对象同样可调用类动态添加的静态方法del p1.name       # del 删除属性delattr(p1, 'sex')print(p1.name, p1.sex)