#!/usr/bin/python
list = []
f = open(‘/root/ming.txt‘,‘r‘)
for str1 in f.readlines():
if not str1 in list:
list.append(str1)
f.close()
for b in list:
f2 = open(‘/root/ming2.txt‘,‘a‘)
f2.write(b)
f2.close()
:wq
原文：http://blog.51cto.com/yangzhiming/2132885