ORM（关系对象映射）框架之面向对象

 1 特殊方法：
 2         class Foo:
 3             def __init__(self,name):
 4                 self.name = name
 5                 
 6             
 7             def show(self):
 8                 print(self.name)
 9                 
10             def __call__(self):
11                 pass
12                 
13             def __getitem__(self,key):
14                 pass
15                 
16             def __setitem__(self,key,value):
17                 pass
18                 
19             def __delitem__(self,key):
20                 pass
21                 
22         obj1 = Foo(‘eric‘)
23         
24         obj1()
25         obj1[‘k‘]
26         obj1[‘k‘] = 123
27         del obj[k]
28         obj.__dict__