python 属性

#! /usr/bin/env python
#! -*- cording:utf-8 -*-
#
# class C:
#     def __getattribute__(self, name):
#         print("getattribute")
#         return super().__getattribute__(name)#super默认找父类
#     def __getattr__(self, name):
#         print("getattr")
#     def __setattr__(self, name, value):
#         print("setatter")
#         super().__setattr__(name,value)
#     def __delattr__(self, name):
#         print("delattr")
#         super().__delattr__(name)
# c=C()
# c.x
#
# c.x=1

class rectangle:
    def __init__(self,width=0,height=0):#构造函数
        self.width=width
        self.height=height
    def __setattr__(self, name, value):
        if name=="square":
            self.width=value
            self.height=value
        else:
            super().__setattr__(name,value)
    def getArea(self):
        return  self.width*self.height

r1=rectangle(4,5)#实例化类
print(r1.getArea())
r1.square=10#说明赋予了一个square属性，被设置了，则直接把square赋值给value，执行操作，就是正方形
print(r1.getArea())
print(r1.__dict__)#直接打印出了字典属性