python实现简单的计时器功能函数

本文实例讲述了python实现简单的计时器功能函数。分享给大家供大家参考。具体如下：

此函数通过python实现了一个简单的计时器动能：

''' Simple Timing Function.
This function prints out a message with the elapsed time from the
previous call. It works with most Python 2.x platforms. The function
uses a simple trick to store a persistent variable (clock) without
using a global variable.
'''
import time
def dur( op=None, clock=[time.time()] ):
 if op != None:
   duration = time.time() - clock[0]
   print '％s finished. Duration ％.6f seconds.' ％ (op, duration)
 clock[0] = time.time()
# Example
if __name__ == '__main__':
 import array
 dur()  # Initialise the timing clock
 opt1 = array.array('H')
 for i in range(1000):
   for n in range(1000):
     opt1.append(n)
 dur('Array from append')
 opt2 = array.array('H')
 seq = range(1000)
 for i in range(1000):
   opt2.extend(seq)
 dur('Array from list extend')
 opt3 = array.array('H')
 seq = array.array('H', range(1000))
 for i in range(1000):
   opt3.extend(seq)
 dur('Array from array extend')
# Output:
# Array from append finished. Duration 0.175320 seconds.
# Array from list extend finished. Duration 0.068974 seconds.
# Array from array extend finished. Duration 0.001394 seconds.

希望本文所述对大家的Python程序设计有所帮助。