[woadwarrior01]

> Can you comment on the use of asynchronous code rather than generators?

I'm not the OP. IIUC, async functions are implemented using generators under the hood. cf: The asyncio.coroutine decorator from Python 3.4, before async await syntax was implemented in Python 3.5 (PEP 492).

[cjdrake]

Correct in this case. In src/seqlogic/sim.py there are four usages of 'yield' keyword that suspend the current coroutine and return control to the event loop.