python3 面向对象高级一些的

Posted 2020-09-03

 1 class Foo:
 2     def __init__(self,name):
 3         self.name=name
 4     def __call__(self, *args, **kwargs):
 5         print(‘====>‘)
 6 f=Foo(‘egon‘)
 7 f()
 8 
 9 class Foo:
10     def __init__(self,name):
11         self.name=name
12     def __getitem__(self,item):
13         print(‘getitem‘,self.__dict__)
14         return self.__dict__[item]
15     def __setitem__(self, key, value):
16         print(‘setimtem‘)
17         self.__dict__[key]=value
18     def __delitem__(self, key):
19         print(‘del obj[key]时,我执行‘)
20         self.__dict__.pop(key)
21 f=Foo(‘egon‘)
22 # print(f[‘name‘]) #f.name
23 f[‘x‘]=1
24 # print(f.__dict__)
25 del f[‘x‘]
26 print(f.__dict__)
27 
28 f1=Foo(‘sb‘)
29 f1[‘age‘]=18
30 f1[‘age1‘]=19
31 del f1.age1
32 del f1[‘age‘]
33 f1[‘name‘]=‘alex‘
34 print(f1.__dict__)

View Code

====>
setimtem
del obj[key]时,我执行
{‘name‘: ‘egon‘}
setimtem
setimtem
del obj[key]时,我执行
setimtem
{‘name‘: ‘alex‘}