asyncio client

[sverhoeven]

The update method on the client is blocked until the server finishes. It would be nice if the update method on the client is non-blocking using asyncio. That way multiple models can be updated in parallel using asyncio.gather.

There is https://github.com/vmagamedov/grpclib which has a asynchronous client.

[goord]

We may also want to consider the api that amuse uses (ask @ipelupessy) where every call accepts the extra optional argument async=True making the call return a request object that can be added to a pool..