Format whole *.py codes

[eggplants]

Ref: #1159, #1589

Proposed Changes

I just ran this in the project root: $ black . && isort .

[ashleysommer]

Hi @eggplants
We usually encourage all PRs to run black on their code before merging, and we regularly check the whole codebase with the black style check in our github actions. So the whole codebase should already be formatted according to our black rules, and should not need to be changed.

We do not currently use isort in this project. I agree it is a good tool, and I use it in several of my personal projects. If we started using it in RDFLib, it would be gradually, starting with only new code and new PRs. There is a lot of very old code in RDFLib (going back to 2001) that has not been touched in years, there is no need to run isort over every source file.

[eggplants]

@ashleysommer OK, I resubmitted PR.