Thanks @nejch

Swiping warnings under the carpet is not good idea ..

You can peak on fixes that kind of issues in other projects
latchset/jwcrypto#289
click-contrib/sphinx-click@abc31069
latchset/jwcrypto#289
RDFLib/rdflib-sqlalchemy#95
sissaschool/elementpath@bf869d9e
jaraco/cssutils#21
pywbem/pywbem#2895

@kloczek please re-open the initial issue if you feel this is important. I'd also appreciate PRs though, as currently I'd rather focus on getting some of our other more important issues into better shape (the CLI and handling complex attributes etc). We can add a help wanted label if that gets people involved as well! :)

Edit: to give some rationale, we already have a lot of very strict linting on the code itself and it seems that beginner contributors give up when CI fails, so this would be another one, but I'm of course happy to merge a proper fix!