You can't change the inheritance as far as I know after creation without some hacks, but you can change the class that an instance refers to which can kinda sor

You can't change the inheritance as far as I know after creation without some hacks, but you can change the class that an instance refers to which can kinda sorta achieve the same thing. You can't necessarily add properties to a base class and have all of those reflect immediately unless you use some hackery with class properties. Example: https://github.com/dabeaz/python-cookbook/blob/master/src/8/implementing_stateful_objects_or_state_machines/example1.py#L5 https://github.com/dabeaz/python-cookbook/blob/master/src/8/...