C1_W2_Assignment - problem Importing Functions and Data

It’s good to hear that you found a solution. But if it worked yesterday, somehow some files must have gotten deleted between then and your “Refresh” operation. It’s a little scary to think that there is some gremlin in the server infrastructure that’s going around and randomly deleting files in various Docker images. But they do have mechanisms for propagating updates to the assignments, so I guess anything is possible there.

It’s not a bad idea to protect yourself against random server malfunctions by keeping local backups. You can download just the notebook itself by clicking “File -> Download as notebook (ipynb)”. Just on general principles, there is also a topic on the DLS FAQ Thread about how to download all the files associated with any assignment. There are a fair number of topics there which are not DLS specific.