用python 找到不存在的数字

先用bash脚本排序，然后用python脚本找出丢失的数字。当然，也可以完全在python脚本中完成。




#!/usr/bin/python


# filename:findlost.py


# author: zhouhh


# http://blog.csdn.net/ablo_zhou

# email:ablozhou@gmail.com


# date:2008.3.31


# Find out what number is lost from a file




import os




infilename = raw_input("in file name [rawpack]:");


outfilename = raw_input("out file name [outfile]:");




if infilename =="" :


infilename="rawpack";




if outfilename =="" :


outfilename="outfile";




cmd = ("sort.sh",infilename,outfilename)


os.system(' '.join(cmd))




f = open(outfilename);




i=0


pkid = 0


count = 0


while True :


line = f.readline()


if len(line) == 0:


f.close()


break




pkid = int(line)


if pkid>i:


print "lost package ",i


i+=1


count +=1


i+=1


print "================================="


print "total package num is",pkid,",lost package count:",count









执行结果：




$ ./findlost.py


in file name [rawpack]:


out file name [outfile]:


./sort.sh,rawpack,outfile


lost package 1707


lost package 2126


lost package 2139


lost package 2278


lost package 2280


lost package 2475


lost package 2763


lost package 3014


lost package 3072


lost package 3165


lost package 3271


=================================


total package num is 3778 ,lost package count: 11