Links: PYTHON - PROGRAMMING
Rel: python standard library
Ref:
Tags: #public

---

import typing

---

Optional

 from typing import Optional

running_max : int = None

^^ this will get upset

running_max : Optional[int] = None

^^ allow to be an integer or None

Iterable

from typing import Iterable
from collections import namedtuple

Item = namedtuple('Item', 'name, value')

def counter(items: Iterable[item] -> int):
    pass

^^^ will give editor hints and validate what going in and returning

vs "items... okay so it's probably multiple things and iterable"