[Tutor] User defined exceptions

[Roel Schroeven]

Op 15/10/2021 om 13:43 schreef Alan Gauld via Tutor:
> You could go further and include a format string that inserts
> the actual value received. That would also speed up debugging:
>
> raise MarksError("Score of %d does not lie between 0 and 100" % score)
Yes! This is not done very often, and it often feels a bit like a chore. 
But it's so very useful in case of errors! IMO that advantage more than 
compensates for the extra effort.

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