This is my approach too. A kind of "relaxed" typing I often call it. Just knowing what a function expects and returns helps a lot, what each element of a tuple is, or what a list contains. Before type hints, I used to not enjoy Python at all, but these days I find it fun. The few times I spend time pondering about how to type things are greatly outweighed by the time saved of not having to research what type a particular variable is.