WARNING: Historic project
Please look at e.g. https://thespianpy.com/doc/ for maintained and working solution to same problem (as of 2/2019).
This is mpykka; a work-in-progress multiprocessing oriented version of pykka, for use with e.g. computationally heavy loads so that CPU can be saturated despite the GIL using pure Python goodness.
API is similar to Pykka, but somewhat different. E.g. concurrency model is assumed to be Threading based one locally, and multiprocessing is used between processes, but there are just Actor+Future(+Process) classes that are user visible.
See https://github.com/jodal/pykka/ for usage.