Error on grading Week 1 assignment

Assignment for Week 1 in the Probability and Statistics course: Grading error.

All the tests pass and I have revied the code dozens of times and still got:

The function is absolutely defined:

Can anyone help me?

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Are you sure that you didn’t accidentally change that cell to be markdown instead of code?

Try doing this sequence:

Kernel -> Restart and Clear Output
Cell -> Run All

Then carefully scan through the notebook and make sure everything ran successfully.


Often this sort of problem happens if you work on the notebook outside of Coursera Labs, and the metadata for a cell gets mangled such that the grader is not told to import that cell.

Is this possibly your situation?

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Thanks for your advice.

Still doesn’t work. The cell is code and I did the sequence.

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No, it’s not my situation, I worked everything inside the coursera website (jupyter).

Thanks a lot for your help.

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Summary for those who find this thread later:

There appeared to be several internal issues with the student’s copy of the notebook. Ultimately the student downloaded a fresh copy of the notebook and completed the assignment successfully.

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