TODO: mypy

• Complex data structures?
• My types/classes?
• Allow None (or not) for a variable.

from typing import Generator

def numbers(n: int) -> Generator[int, None, None]:
    return ( x for x in range(n))

print(list(numbers(10)))

from typing import List

def numbers(n: int) -> List[int]:

    return list(range(n))

print(numbers(10))