python读取txt文件时报错UnicodeDecodeError: 'gbk' codec can't decode byte 0x8e in position 8: illegal multibyte sequence

python读取文件时报错UnicodeDecodeError: 'gbk' codec can't decode byte 0x8e in position 8: illegal multibyte sequence，如下代码：

 #coding:utf-8
 import shutil
 readDir = "F:\\爬取数据\\11.txt"
 writeDir = "F:\\爬取数据\\22.txt"
 #txtDir = "/home/fuxueping/Desktop/１"
 lines_seen = set()
 outfile=open(writeDir,"w")
 f = open(readDir,"r",encoding='UTF-8')
 for line in f:
     print(line)
     if line not in lines_seen:
         line = str(line)
         outfile.write(str(line))
         lines_seen.add(line)
 outfile.close()
 print ("success")

解决方案1：

f = open(readDir,"rb")

此方案虽然没有在报错，但写入的数据不是想要的格式，如下：

解决方案2：

f = open(readDir,"r",encoding='UTF-8')

一切保存正常