Sourcery refactored python3 branch

[sourcery-ai[bot]]

Branch python3 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 python3 branch, then run:

git fetch origin sourcery/python3
git merge --ff-only FETCH_HEAD
git reset HEAD^

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