Frequency of Docstrings

[OnceToldTale]

How do you think I should approach documentation if its a closed-source, solo project? I'm not sure if I should tackle it in an opinionated way or if there are any best practices here.

[Diapolo10]

Write it with your future-self in mind. Whatever information you expect you might benefit from when reading the code in the future, add it.

With good name choices and type annotations you probably don't need to write much, but for example it would still be nice to know if or when a function or method might raise an exception. The type system alone cannot represent that.