python type hints with None code example

Example 1: python typing list of strings

from typing import List

def my_func(l: List[int]):
    pass

Example 2: python typing module list

"""
typing.Tuple and typing.List are Generic types; this means you can specify what type their contents must be:
"""

def f(points: Tuple[float, float]):
    return map(do_stuff, points)