NameError: name 'os' is not defined

[Shengsj]

I try to run this code,but the main.py always to show this wrong .Although I have trying my best to solve this problem. it's still there. could you give me some advice? Other's code is OK!

[crownpku]

I guess you are running on Windows?

The experiment I did was on linux. Perhaps you should check if Windows has other replacement for "os" package in Python?

[geekboood]

On windows, I modified the first line and changed it to # encoding=utf-8 and fixed the error.

[bluesky632]

感谢@geekboood，你的方法解决了这个问题