Python attribute type hint: list of specific strings?

Question

Is there a type hint that expects a string out of a list of strings?

import typing

@dataclass
class Person:
   name: str = None
   gender: typing.Choice(['male', 'female'])  # <- Something like this?

Person(name='John', gender='male')   # okay
Person(name='John', gender='female') # okay
Person(name='John', gender='apple')  # error

Thanks!

Answer 1

Multiple options:

• Based on typing ( https://docs.python.org/3/library/typing.html#typing.Literal , note: New in version 3.8.)

from typing import Literal
gender = Literal['male', 'female', 'other']

• Using enums ( https://docs.python.org/3/library/enum.html#enum.Enum )

from enum import Enum
class Gender(Enum):
   FEMALE = "female"
   MALE = "male"
   OTHER = "other"