integration of exercices with nbautoeval

[shalkya]

Description

Add exercices in the notebook. Here I have integrated one exercice in the T002 as an example.

Todos

Notable points that this PR has either accomplished or will accomplish.

• [ x] Added an exercice in exercices.py for T002

• [ x] modified T002 notebook to integrate the exercice

• [ x] display an example of expected output:
  

• [ x] correct function made by students:
  
  

• [ x] Added a spoiler to have easy access to the answer
  
  

You can see more of them here: https://github.com/ICOA-SBC/GSON-cheminformatics (this is a repository used to give chemo-informatics courses, based on a old version of teachopencadd)

here is the repository for nbautoeval: https://github.com/parmentelat/nbautoeval

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[dominiquesydow]

Hi @shalkya,

Thank you very much for showcasing this feature!
I am closing this PR after having opened a Discussion entry about this potential new feature.

I am also cross-referencing here my comment from #211: #211 (comment)

Thanks again!!