python testing using type hinting code example

Example 1: python typing list of strings

from typing import List

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

Example 2: specify return type python function

def greeting(name: str) -> str:
  return 'Hello, {}'.format(name)

Example 3: typing python

from collections.abc import Iterable

def zero_all_vars(vars: Iterable[LoggedVar[int]]) -> None:
    for var in vars:
        var.set(0)