yi_example.py

ray.init()

@ray.remote
class Controller:
    def start_me_an_actor(self, cls):
        # Start an actor on behalf of the caller.
        ray.remote(cls).remote()

Controller.options(name="controller", lifetime="detached").remote()

# The below can happen in a new driver program.

ray.init(working_dir=".")

class MyNewActor:
    pass

# The user probably wants the working_dir to be set properly here, but
# it won't because the controller was run in a different job.
controller = ray.get_actor("controller")
controller.start_me_an_actor.remote(MyNewActor)