A small hook that can hook the __new__ function of class definitions to return a subclass instead. This is usefull if you want to subclass something that is created internaly by a library but you dont want to change source.

hook.py

def hook_type(to_hook, new_cls: type):
    if to_hook not in new_cls.__mro__:
        raise TypeError(f"{new_cls} musst subclass {to_hook}")
    old_new = to_hook.__new__

    def hook(_, *args, **kwargs) -> type:
        if hasattr(old_new, "__self__"):
            if old_new.__self__ is object:
                return old_new(new_cls)
        return old_new(new_cls, *args, **kwargs)

    to_hook.__new__ = hook