I've introduced mypy to a project in the past. It was part of taking an older, low quality code base and stabilizing it into something useful. Sometimes you c

I've introduced mypy to a project in the past. It was part of taking an older, low quality code base and stabilizing it into something useful. Sometimes you can't just throw it all away and start over and need a gradual approach that will start paying some dividends immediately. mypy fits that bill.