python 读取文件时报错 UnicodeDecodeError_‘gbk‘ codec can‘t decode byte 0x80 in position 100

我写了一个txt文件（一堆键值对），想把他转为字典

原始代码

fr = open('cityid.txt','r')
dic = {}
for line in fr:
    value = line.strip().split(':')
    dic[value[0]] = value[1]
fr.close()
print(dic)

报错说 'gbk' codec can't decode byte 0x80 in position 100

解决办法

在打开时指定解码方式为UTF-8 即 fr = open('cityid.txt','r', encoding='UTF-8')

fr = open('cityid.txt','r', encoding='UTF-8')
dic = {}
for line in fr:
    v = line.strip().split(':')
    dic[v[0]] = v[1]
fr.close()
print(dic)