這裏做個最簡單的賬號密碼驗證,主要為了實現裝飾器同時對多個函數起作用

 1 FLAG = False    #加一個變量防止多次登錄驗證
 2 def wrapper(f):
 3     def inner(*args,**kwargs):
 4         ‘‘‘登錄程序‘‘‘
 5         global FLAG #將FLAG變量設置成全局變量
 6         if FLAG:
 7             ret = f(*args, **kwargs)
 8             return ret
 9         else:
10             username = input(‘
 
username:‘)
11             password = input(‘password:‘)
12             if username == ‘123‘ and password == ‘345‘:
13                 FLAG = True
14                 ret = f(*args,**kwargs)
15                 return ret
16             else:
17                 print(‘登錄失敗‘)
18     return inner
19 
20 @wrapper
 
21 def func_1():
22     print(‘func1 is running!‘)
23 
24 @wrapper
25 def func_2():
26     print(‘func2 is running!‘)
27 
28 func_1()
29 func_2()

　　運行結果:

1 username:123
2 password:345
3 func1 is running!
4 func2 is running!

<每日一題>題目2:編寫裝飾器,為多個函數加上認證功能(用戶賬號和密碼來源於文件)