I program roughly equal amounts in Python and Haskell and every time I read Python documentation I wish it were as good as Haskell's. Having type signatures go

I program roughly equal amounts in Python and Haskell and every time I read Python documentation I wish it were as good as Haskell's. Having type signatures goes a long, long way to understanding an API. Python replaces that with rambling, unclear, prose. The same goes for Python's standard library and popular libraries like flask, pandas and matplotlib. (Haskell's direct links to source are also good, but there's no fundamental reason Python couldn't have those. I've never seen it though.)