Maybe I’m missing something, but in lesson4-collab there seems to be a missing step for getting the 100K dataset.
The notebook refers/points to a zip file, but fetching and populating the folder steps are excluded, and running the folder resulted in a FileNotFoundError.
In case anyone else happens on this, here’s what I did to get around (on AWS and WinSCP):
linux/AWS: Create folder /ml-100k
Windows: follow link and download the zip file
Windows: unzip to /ml-100k folder
Windows: use WinSCP to transfer the local /ml-100k folder contents to linux/AWS
After that, everything worked.