Sourcery refactored master branch

[sourcery-ai]

Branch master refactored by Sourcery.

If you're happy with these changes, merge this Pull Request using the Squash and merge strategy.

See our documentation here.

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Review changes via command line

To manually merge these changes, make sure you're on the master branch, then run:

git fetch origin sourcery/master
git merge --ff-only FETCH_HEAD
git reset HEAD^

Help us improve this pull request!

[sourcery-ai]

Function gen_contents refactored with the following changes:

• Replace if statement with if expression (assign-if-exp)

[sourcery-ai]

Function copy_notebooks refactored with the following changes:

• Use f-string instead of string concatenation [×2] (use-fstring-for-concatenation)