Add python formatting to checks

[arthurp]

Add python formatting (using black) to make check and make format.

[arthurp]

@ioeddk you are the only other person who has written significant python code. Are you OK with this formatting? I say "OK", because black is very strict and doesn't align with what everyone loves, but it generally works very well and is pretty standard now. That said, if you have any major concerns we can talk about adjusting setting or whatever.

[ioeddk]

@ioeddk you are the only other person who has written significant python code. Are you OK with this formatting? I say "OK", because black is very strict and doesn't align with what everyone loves, but it generally works very well and is pretty standard now. That said, if you have any major concerns we can talk about adjusting setting or whatever.

I'm OK with it. I can use any format as long as there are some automatic formatter.