1 class Type:
2 def __init__(self, key, expcet_type):
3 self.key = key
4 self.expct_type = expcet_type
5
6 def __get__(self, instance, owner):
7 print('执行get')
8 return instance.__dict__[self.key]
9
10 def __set__(self, instance, value):
11 print('执行set')
12 if not isinstance(self.key, self.expct_type):
13 print('%s 类型不符合%s'%(value,self.expct_type))
14 return
15 instance.__dict__[self.key] = value
16
17
18 def test(**kwargs):
19 def wrapper(obj):
20 for k, v in kwargs.items():
21 val = Type(k, v)
22 setattr(obj, k, val)
23 return obj
24
25 return wrapper
26
27
28 @test(name=str, age=int, gender=str, price=int)
29 class Foo:
30 def __init__(self, name, age, gender, price):
31 self.name = name
32 self.age = age
33 self.gender = gender
34 self.price = price
35
36
37 print(Foo.__dict__)
38 f1 = Foo('alex',16, '男',13)
39 print(f1.__dict__)
40 输出：
41 {'__module__': '__main__', '__init__': <function Foo.__init__ at 0x009A8A00>, '__dict__': <attribute '__dict__' of 'Foo' objects>, '__weakref__': <attribute '__weakref__' of 'Foo' objects>, '__doc__': None, 'name': <__main__.Type object at 0x00992FD0>, 'age': <__main__.Type object at 0x009AE148>, 'gender': <__main__.Type object at 0x009AE0E8>, 'price': <__main__.Type object at 0x009AE178>}
42 执行set
43 执行set
44 16 类型不符合<class 'int'>
45 执行set
46 执行set
47 13 类型不符合<class 'int'>
48 {'name': 'alex', 'gender': '男'}
