[icebraining]

It also helps if you want to write code conversion tools, like gofix. I once stopped writing such a tool for a Python project because it was a pain trying to change only the affected lines, while keeping the idiosyncratic syntax of the rest of the files unaffected.

(By the way, for people trying to do the same, I recommend the redbaron library, which makes it much easier to handle: https://github.com/PyCQA/redbaron)