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

python 2.7 问题

　data_file = open("F:\\MyPro\\data.yaml", "r", encoding='utf-8')

　　运行的时候报错：TypeError: 'encoding' is an invalid keyword argument for this function
如何解决：

import io
data_file = io.open("F:\\MyPro\\data.yaml", "r", encoding='utf-8')