[dmurray]

Since Black enforces that indents are exactly four spaces, you could configure your editor to render four spaces at the start of a line as two spaces, getting exactly the behaviour you desire from tabs.

An editor plugin for this wouldn't even have to be syntax-aware, except for some rare cases where you are using spaces to nicely align a multiline string.

[afavour]

“Since black enforces four spaces, all you need to do is reinvent the functionality of tabs”

I know it’s very far from the biggest problem in the world but this does make me chuckle a little.