TypedDictKeys.py

from typing import Literal, TypedDict


class Td(TypedDict):
    bar: str
    foo: str


manual_literal = Literal['bar', 'foo']

def hello_td_str(key: str, td: Td):
    return 'Hello ' + td[key]

def hello_td_manual(key: manual_literal, td: Td):
    return 'Hello ' + td[key]


my_td = {'bar': 'Bar', 'foo': 'Foo'}

print(hello_td_manual('bar', my_td))
print(hello_td_str('foo', my_td))