How to document python function parameter types?

Question

I know that the parameters can be any object but for the documentation it is quite important to specify what you would expect.

First is how to specify a parameter ty

Answer 1

If using Python 3, you can use the function annotations described in PEP 3107.

def compile(
   source: "something compilable",
   filename: "where the compilable thing comes from",
   mode: "is this a single statement or a suite?"):

See also function definitions.