There was a problem compiling the code from your notebook. Details: sequence item 0: expected str instance, NoneType found

Course Q&A Machine Learning Engineering for Production(MLOps) Machine Learning Data Lifecycle in Production
1

My notebook runs and my answers are matching the expected answers. However, when I try to submit I get 0% with the following error:

There was a problem compiling the code from your notebook. Details:
sequence item 0: expected str instance, NoneType found

I searched around for it in the forum and looks like some people had a similar issue multiple years back but there’s no solution posted, so I’m not sure how to proceed with the grading now.

Any tips would be appreciated!

2

Check where you are supposed to return a string as an output and also check that that function return a string always. My guess is that for some case your function is return None instead of a string required that the in - Lab tests are not testing it for.

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3

Check that you have completed the entire notebook before you send it for grading.

Also check that you have not renamed the notebook. Only a notebook with the original file name can be graded.

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