Hi @glemaitre i solved the suggestions!
Let me if there's anything more to do.
Besides that, I have a doubt, maybe a begginer question but if you could help me, It would be great:
How do I know a line is too long? Is there a convention, besides running flake8 and black?

Thank you for the attention and the feedback!

How do I know a line is too long? Is there a convention, besides running flake8 and black?

flake8 is indeed the linter that will tell you that the line is too long. So the limit is 79 characters.
We are transitioning to black for the code itself and currently, it is set to 88 characters but we have to vote if we keep the 80 characters limit or not :)

The best way to know about the limit when you edit the code is to have a vertical ruler on your IDE.

Merging. Looks good.