No module named 'fastai'

I’m having a similar problem. I’m also trying to run lesson 1 on my local machine. I’ve followed the instructions to install the library.

Oddly, I’m getting an error on line 2

         1 from fastai import *
--->     2 from fastai.vision import *

ImportError: No module named vision

Can you walk me through what might be happening here?

Thanks!