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To add onto this, I also found that Black works as a nice heuristic indicating to split up code when the formatted output isn't "pretty" into separate lines.

It's been at least a decade since I've not used an autoformatter on every piece of code ever. I didn't realize there were people who worked at places without autoformatters still.

Had a similar experience when I used rustfmt (which led me to trying black). I was used to formatters that over formatted, removing newlines used to dilineate sections of code, etc. I tried rustfmt when learning Rust because I figured id learn adopt standard practices.

It was revolutionary. I went from formatting as I went, even for prototyping to throwing code at my editor and letting rustfmt fix it. Big difference in productivity.