1 import time
 2 
 3 def timer(func):
 4     #def deco():  #part1
 5     #def deco(arg1):   #part2
 6     def deco(*args,**kwargs):   #part3
 7         start_time=time.time()
 8         #func()   #part1
 9         #func(arg1)   #part2, 這裏帶了參數會影響到test1(),因為test1()裏面沒有參數
10         func(*args,**kwargs)    #
 
part3，test1()沒有參數不影響，*args可以匹配空參數
11         stop_time=time.time()
12         print(‘the time of the function running is %s‘%(stop_time-start_time))
13     return deco
14 
15 @timer
16 def test1():
17     time.sleep(1)
18     print(‘this is test1‘)
19 
20 @timer
21 def test2(name):     #給test2加一個形參,  test2=timer(test2)=func, test2裏面有參數，func應該也要加參數
 

22     time.sleep(1)
23     print(‘this is test2‘,name)
24 
25 #test1()    #part2
26 test1()     #part1, part3
27 test2(‘alex‘)    #從錯誤可以看到test2()=deco() test2給了實參，deco()裏面也必須要給個參數
28 #TypeError: deco() takes 0 positional arguments but 1 was given
29 
30 #part3結果
31 # this is test1
32 # the time of the function running is 1.0000574588775635
 

33 # this is test2 alex
34 # the time of the function running is 1.0000569820404053

裝飾器中使用args