Python中list查询及所需时间计算操作示例

# -*-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