[Python]pyhon去除txt文件重復行 python 2020.2.10

代碼如下：

import shutil

readPath='E:/word4.txt' #要處理的文件
writePath='E:/word5.txt' #要寫入的文件
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)