I'm not familiar with the python ray package. If you are familiar with actors as they exist in erlang and elixir, there's a comparison of those to Pony that might help your understanding.
Turns out an easy google search answered my question as well... this post https://medium.com/distributed-computing-with-ray/ray-for-th... does say that ray uses the actor model, and ray is listed on The Actor Model wikipedia page as an Actor Model library.
If anyone from the Pony teams sees this, are actors in Pony conceptually similar to actors created with ray?