I'm having trouble with the grader Programming Assignment: Social Network Database Fix

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1

I’m having trouble with the grader Programming Assignment: Social Network Database Fix, while unit tests are passing, still getting zero grade with below ,
If Anyone faced this similar issue, please help. Thanks
error:

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2

Have you completed the entire notebook before sending it for grading?

3

Thanks for reply,Yes. I run through entire notebook.
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4

Have you by any chance altered code you are not meant to do so? Try to perform a reset of the Lab and resolve it…

1 Like
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Have you changed the filename of the notebook?

Note also that the grader uses different test cases than are used in the notebook. So passing the notebook’s tests does not prove your code is perfect.

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Sometimes the notebook isn’t saved before submitting, so even though you pass the tests and have a complete solution, you are actually submitting the blank notebook you had at the beginning. Can you try saving it and submitting again?

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General guidelines before submitting a notebook:

Use “File → Save and Checkpoint”.
Use “Kernel → Restart and clear output”
Use “Cell → Run All”.

Verify all of the notebook’s tests give the expected results.

Then submit it for grading.

Be extremely careful that you never rename the notebook you intend to submit for grading.

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i’m having this same problem , were you able to fix this ?

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I did all this, initally i got an error of session not defined failed to complete, then using backup folder i redid the whole thing , then i got this none error

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Hi,

I see what might be the problem. When I started the assignment, I added a new cell to your notebook and deleted the original one. However, this means I no longer have a copy of the initial version.

It seems I missed an important step in the assignment. The grader may not be able to find the metadata of the original cell.

Could you please share the original assignment notebook, or let me know where I can find the initial version?

" IMPORTANT NOTE FOR GRADING:

Please submit your work after placing your solutions in the exercises of the assignment and saving the notebook. Don’t delete cells as these include important metadata for grading. Fill out your solutions within the provided spaces (i.e. replacing the None placeholders). You can add new cells but these will be omitted by the grader."

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Ok, Found the solution :slight_smile: Thanks for everyone for help and pointers.
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  • Problem: I missed an important note about grading requirements.
  • What I did:
  • Downloaded the running version of the assignment locally.
  • Rebooted the server, from Lab Help. (screenshot attached for reference)
  • Used the change log to download the first backup copy (the original version).
  • Re-uploaded the original version.
  • Updated the code in the original version without changing any cells.
  • Result: It worked!
  • Hope: This might help others in similar situations.

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