Day 3-5 装饰器

 1 def tokyo():
 2     print(‘日本专区‘.center(30, ‘-‘))
 3 
 4 
 5 def america():
 6     print(‘美洲专区‘.center(30, ‘-‘))
 7 
 8 
 9 def euro():
10     print(‘欧洲专区‘.center(30, ‘-‘))
11 
12 user_status = False
13 
14 
15 def login(func):
16     def inner():
17         global user_status
18         if user_status == False:
19             user = input(‘user:‘).strip()
20             password = input(‘password:‘)
21             if user == ‘alex‘ and password == ‘123‘:
22                 print(‘welcome....‘)
23                 user_status = True
24         if user_status:
25             func()
26     return inner   # 把inner的内存地址返回给login(func),所以下面tokyo = login(tokyo)的时候,其实等于tokyo = inner
27 　　# 相当于用闭包和函数的重新赋值,完成了装饰器.
28 
29 tokyo = login(tokyo)
30 tokyo()