TypeError: 'encoding' is an invalid keyword argument for this function

python 2.7版本

data_file = open("data.txt", "r", encoding='utf-8')

运行的时候报错：

TypeError: 'encoding' is an invalid keyword argument for this function

解决：

import io

data_file = io.open("data.txt", "r", encoding='utf-8')

参考
python 2.7版本解决TypeError: ‘encoding’ is an invalid keyword argument for this function