No module named 'unittests'

Module 3 assignment is giving me error of No module named ‘unittests’ when i check my grade after submission. when i check and run my code in the environment it works fine.
My course is ending on 21st july and this has become the last bottleneck.

can someone please guide me.

Hi @AYESHA10 ,

The execution environment does not keep its state. It is advised to run your code from start to keep the environment up-to-date every time you log back to system or if the kernel has been idle for awhile. Try to do a clean run before submitting your assignment:

  1. Kernel → restart & clear all output
  2. Cell → run all
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