What kind of problems (if any) would there be combining asyncio with multiprocessing?

Question

As almost everyone is aware when they first look at threading in Python, there is the GIL that makes life miserable for people who actually want to do processing in parallel

Answer 1

See PEP 3156, in particular the section on Thread interaction:

http://www.python.org/dev/peps/pep-3156/#thread-interaction

This documents clearly the new asyncio methods you might use, including run_in_executor(). Note that the Executor is defined in concurrent.futures, I suggest you also have a look there.