Proposal: Make code more PEP8, black and pythonic

[Dimonade]

Hello,

This MR is aiming to make the codebase more stylistically standard to the python coding guidelines. By using a set of agreed-upon formatters and guidelines, it is possible to ensure similarly looking codebase across different files and projects, thus reducing cognitive load when reviewing MRs from other people. This allows to focus on the code and not on stylistic differences.

This MR should not alter any functionality, only adhere better to the standards.

[GalenReich]

Thanks for this! 🙌 It is a good reminder that having a standard formatter configuration could help improve legibility across projects