Python学习之路-----像字典操作对象

class Person(object):
    def __init__(self,age,name):
        self.age = age
        self.name = name
    
    def __str__(self):
        return 'name:{} age:{}'.format(self.name,self.age)
    
    def __getitem__(self,key):
        print('__getitem__ was called')
        return self.__dict__[key]
    
    def __setitem__(self,key,value):
        print('__setitem__ was called')
        self.__dict__[key] = value
        
if __name__ == '__main__':
    #pass
    #f()
    p1 = Person(10,'zhangsan')
    print(p1)

    print(type(p1.__dict__))   #p1.__dict__会把这个对象的属性以及值以键值对的形式转化成字典
    p1['name'] = 'tom'        #以字典的形式给属性赋值会调用__setitem__方法
    print(p1.name)
    print(p1['name'])         #以字典的形式获取值会调用__setitem__方法




结果：
name:zhangsan age:10
<class 'dict'>
__setitem__ was called
tom
__getitem__ was called
tom