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：#-

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