python基础----装饰器

 1 #装饰器
 2 
 3 import time  #调用时间模块（系统自带的time模块）
 4 def timmer(func):
 5     def wrapper():
 6         #print(func)
 7         start_time=time.time()
 8         func()
 9         stop_time=time.time()
10         print(‘run time is %s‘ %(stop_time - start_time))
11     return wrapper
12 
13 @timmer    #index=timmer(index)
14 def index():
15     time.sleep(1)
16     print(‘welcome to oldboy‘)
17 index()    #   --------->wrapper()

 1 import time  #调用时间模块（系统自带的time模块）
 2 def timmer(func):
 3     def wrapper(*args,**kwargs):
 4         start_time=time.time()
 5         func(*args,**kwargs)
 6         stop_time=time.time()
 7         print(‘run time is %s‘ %(stop_time - start_time))
 8     return wrapper
 9 
10 @timmer
11 def home(name):
12     time.sleep(2)
13     print(‘welcome to %s home page‘%name)
14 
15 @timmer
16 def auth(name,password):
17     print(name,password)
18 
19 @timmer
20 def tell():
21     print(‘------------------‘)
22 
23 home(‘dragon‘)
24 auth(‘egon‘,‘123‘)
25 tell()

 1 import time  #调用时间模块（系统自带的time模块）
 2 def timmer(func):
 3     def wrapper(*args,**kwargs):
 4         start_time=time.time()
 5         res=func(*args,**kwargs)
 6         stop_time=time.time()
 7         print(‘run time is %s‘ %(stop_time - start_time))
 8         return res
 9     return wrapper
10 
11 @timmer
12 def my_max(x,y):
13     print(‘my_max function‘)
14     res=x if x > y else y
15     return res
16 
17 res=my_max(1,2)
18 print(‘=====>‘,res)

 1 def auth2(auth_type):
 2     def auth(func):
 3         #print(auth_type)
 4         def wrapper(*args,**kwargs):
 5             if auth_type == ‘file‘:
 6                 name = input (‘username: ‘)
 7                 password = input(‘password: ‘)
 8                 if name == ‘egon‘ and password == ‘123‘:
 9                     print(‘auth successfull‘)
10                     res=func(*args,**kwargs)
11                     return res
12                 else:
13                     print(‘auth error‘)
14             elif auth_type == ‘sql‘:
15                 print(‘还他妈不会玩‘)
16         return wrapper
17     return auth
18 
19 @auth2(auth_type=‘file‘)      #index=auth(index)             #这是通过本地文件方式读取
20 def index():
21     print(‘welcome to index page‘)
22 index()
23 
24 
25 @auth2(auth_type=‘sql‘)      #index=auth(index)                 #这是通过数据库方式读取
26 def index():
27     print(‘welcome to index page‘)
28 index()