Why you should care about types: How Python typing helped my team scale

import this

>>> Explicit is better than implicit.

>>> Readability counts

>>> In the face of ambiguity, refuse the temptation to guess.

from typing import Type, TypeVar

class BaseClass:
    pass

class DerivedClass(BaseClass):
    pass

T = TypeVar("T", bound=BaseClass)

def factory(clazz: Type[T]) -> T:
    return claszz()