Type hinting quiz

vehicle.py

# vehicle.py

from collections import namedtuple

class Vehicle:
    def __init__(self, name, veh_type):
        self.name = name
        self.veh_type = veh_type
        self.add_ons = []
        
    def add_on(self, name, color, placement):
        AddOn = namedtuple("AddOn", "name color placement")
        add_on = AddOn(name, color, placement)
        self.add_ons.append(add_on)
        return add_on

Replacing namedtuple with a subclass of typing.NamedTuple ?

# vehicle.py

from typing import NamedTuple
from typing import List


class AddOn(NamedTuple):
    name: str
    color: str
    placement: str


class Vehicle:
    def __init__(self, name: str, veh_type: str) -> None:
        self.name = name
        self.veh_type = veh_type
        self.add_ons: List = [AddOn]

    def add_on(self, name: str, color: str, placement: str) -> AddOn:
        # AddOn = namedtuple("AddOn", "name color placement")
        add_on = AddOn(name, color, placement)
        self.add_ons.append(add_on)
        return add_on

@evilensky You're close. I think you need a return type on the __init__ too (and you don't need Callable any more)

This looks pretty good. I don't think you need [AddOn], but it works for this example