本文实例讲述了Python实现的txt文件去重功能。分享给大家供大家参考，具体如下：
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# -*- coding:utf-8 -*-
#! python2
import shutil
a=0
readDir = "/Users/Administrator/Desktop/old.txt" #old
writeDir = "/Users/Administrator/Desktop/new.txt" #new
# txtDir = "/home/Administrator/Desktop/１"
lines_seen = set()
outfile = open(writeDir, "w")
f = open(readDir, "r")
for line in f:
if line not in lines_seen:
a+=1
outfile.write(line)
lines_seen.add(line)
print(a)
print('\n')
outfile.close()
print("success")
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其中old.tx如下：
www.zzvips.com
www.baidu.com
www.sina.com.cn
www.zzvips.com
www.google.com
www.sohu.com
www.zzvips.com
www.163.com
运行后new.txt内容如下：
www.zzvips.com
www.baidu.com
www.sina.com.cn
www.google.com
www.sohu.com
www.163.com
希望本文所述对大家Python程序设计有所帮助。
原文链接：https://blog.csdn.net/sinat_35360663/article/details/80414699