Inheritance means "is a": a Dog is an Animal. Many relationships are "has a" instead: a Car has an Engine; a Basket has Items. For those, store one object inside another. That is composition, and it is often the better choice:

class Engine:
    def __init__(self, power):
        self.power = power

    def start(self):
        return f"{self.power}hp engine running"

class Car:
    def __init__(self, model, engine):
        self.model = model
        self.engine = engine

    def start(self):
        return f"{self.model}: {self.engine.start()}"

print(Car("Mini", Engine(130)).start())

A useful rule: if you can't honestly say "a child is a parent", don't use inheritance.