[Python]pyhon去除txt文件重复行 python 2020.2.10

代码如下：

 import shutil

 readPath='E:/word4.txt' #要处理的文件
 writePath='E:/word5.txt' #要写入的文件
 lines_seen=set()
 outfiile=open(writePath,'a+',encoding='utf-8')
 f=open(readPath,'r',encoding='utf-8')
 for line in f:
     if line not in lines_seen:
         outfiile.write(line)
         lines_seen.add(line)