Use black for formatting

[pehala]

This is what black looks like with --line-length set to 120

This is an experimental PR which showcases what black would look like and I would like to hear what you think about code quality.

For Pycharm users, see https://black.readthedocs.io/en/stable/integrations/editors.html for configuring support for black.

[pehala]

Rebased to the latest main, please let me all know what kind of changes you do not like so we can discuss them

[jsmolar]

JSON one-line formatting is arguably worse readable.

[averevki]

There is an option to leave dictionary formatting in the "traditional way" if black sees a trailing comma after the last element.

[jsmolar]

That would be great, but black can't be configured if I remember correctly. Its rules are set (that is what is good about black). But we can still use ignore

[pehala]

@averevki You are right! Thanks for the suggestions. https://black.readthedocs.io/en/stable/the_black_code_style/current_style.html#the-magic-trailing-comma. It is not a config option, but if you have a comma after the last element in dict/Func call/Tuple it won't get squashed to a oneliner. @jsmolar Could you show me all locations where you would like to get rid of oneliners?

[averevki]

I like the overall consistency of the code. I believe long one-liners can be solved by setting a shorter line length (e.g. to black default 88 characters), if this is an option.

[jakurban]

As the saying goes "new year, new me", after the new year I somehow started to feel that black is a welcome change in our project hence I approved this PR.

[pehala]

I like the overall consistency of the code. I believe long one-liners can be solved by setting a shorter line length (e.g. to black default 88 characters), if this is an option.

I consider a length of 120 to be still reasonable also thanks to your suggestion with the magic trailing comma we have an option to "disable" one-liners.