发布于 2015-03-17 00:56:07 | 348 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Python3 Cookbook中文版，程序狗速度看过来！

Python编程语言

Python 是一种面向对象、解释型计算机程序设计语言，由Guido van Rossum于1989年底发明，第一个公开发行版发行于1991年。Python语法简洁而清晰，具有丰富和强大的类库。它常被昵称为胶水语言，它能够把用其他语言制作的各种模块（尤其是C/C++）很轻松地联结在一起。

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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：

示例代码

''' 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.