Python中list查询及所需时间计算操作示例

本文实例讲述了Python中list查询及所需时间计算操作。分享给大家供大家参考,具体如下:

# -*-coding=utf-8 -*-
#! python2
#filename: list_query
#date: 2018-03-25
#author: guosw
import time
def cost_time(fun):
  def cost(*args,**kwargs):
    stime = time.time()
    x = fun(*args,**kwargs)
    etime = time.time()
    print "function name:",fun.__name__
    print "time cost:",etime-stime
    return x
  return cost
@cost_time
def list_query(_list,_val):
  low = 0
  height = len(i) - 1
  mid = (height - low) // 2
  for n in xrange(height+1):
    if _list[n] == _val:
      return n
  for n in xrange(mid,height+1):
    if _list[n] == _val:
      return n
if __name__ == "__main__":
  i = xrange(100000)
  subscript = list_query(i,9999)
  print subscript

运行结果:

function name: list_query
time cost: 0.00100016593933
9999

更多关于Python相关内容感兴趣的读者可查看本站专题:《Python数组操作技巧总结》、《Python字符串操作技巧汇总》、《Python函数使用技巧总结》、《Python入门与进阶经典教程》及《Python数据结构与算法教程》

希望本文所述对大家Python程序设计有所帮助。

相关推荐