装饰器高潮

import time                                                                   
                                                                              
def timer(func):    #func = sample_1   timer(sample_1)                        
    def deco():                                                               
        start_time = time.time()                                              
        func()      #run sample_1()                                           
        stop_time = time.time()                                               
        print("the func time is %s" %(start_time-stop_time))                  
    return deco                                                               
                                                                              
                                                                              
@timer  #timer来装饰sample_1                                                     
def sample_1():    #相当于 sample_1 = timer(sample_1)                            
    time.sleep(3)                                                             
    print(‘it is sample_1‘)                                                   
                                                                              
                                                                              
#直接执行函数                                                                       
sample_1()                                                                    
#输出结果
it is sample_1
the func time is 3.0023279190063477