helpers.py 文件源码

def get_all_subclasses(cls: t.Type[T]) -> t.Iterable[t.Type['T']]:
    """Returns all subclasses of the given class.

    Stolen from:
    https://stackoverflow.com/questions/3862310/how-can-i-find-all-subclasses-of-a-class-given-its-name

    :param cls: The parent class
    :returns: A list of all subclasses
    """
    all_subclasses = []

    for subclass in cls.__subclasses__():
        all_subclasses.append(subclass)
        all_subclasses.extend(get_all_subclasses(subclass))

    return all_subclasses