Annotations in python?

Question

Python

Why do we need annotations in functions? There is an example:

def f(a:'spam', b:(1,10), c: float) -> int:
    return a+b+c

f(5,6,7) - #вернет конечно же 18
What is the point then in the annotations themselves if they do nothing?

Answer 1

For the IDE and other people who will read the code