Pythonプログラムの実行時間を計算する方法

 
  
 import time 
   
  
def start_sleep():
     time.sleep(3)
 
  
if __name__ == '__main__':
     #The start time 
     start = time.clock()
 
  
    #A program which will run for 3 seconds
     start_sleep()
 
  
    #The End time 
     end = time.clock()
 
  
    print("The function run time is : %.03f seconds" %(end-start))
 
  
    # End