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__會把這個對象的屬性以及值以鍵值對的形式轉化成字典
p1['name'] = 'tom' #以字典的形式給屬性賦值會調用__setitem__方法
print(p1.name)
print(p1['name']) #以字典的形式獲取值會調用__setitem__方法
結果:
name:zhangsan age:10
<class 'dict'>
__setitem__ was called
tom
__getitem__ was called
tom