Tests aren’t enough: Case study after adding type hints to urllib3
I love static typing/type hints if for only 1 thing - code maintenance.Even code I wrote six months ago.Not having to dig through 6 functions deep to try to figure out whether "person" is a string, or an object, and if it's an object what attributes it has on it etc. is huge. And not to mention that some clever people decide - hey, if you pass a string I'll look up the person object - so you can pass an object or a string - which makes all sorts of convoluted code paths when someone else was looking at "person" and only saw one type so now their function doesn't work on both types etc.I hate having to waste time figuring out the type of every variable and hold it in my head every single time I read a piece of code.