Handling concurrent asyncio.sleeps

[pgit]

Let there bei 2 tasks A and B, with A repeatedly sleeping for short intervals (e.g. 0.1s) and B sleeping once for a longer interval (5s). So one Execution of B spans multiple executions of A.

So the callback queue looks like this:

1. A (0.1s)
2. B (5s)

Now, when fast-forwarding to 10s, A is popped from the queue first. It schedules another A after 0.1s, which ist still way before the first run of B. But before ist is actually executed, B is popped as well! The next sleep(0.1) issued by A should be executed before B.

Is there any way to make this work, I.e. handle a Tasks that might schedule another task? This would better match the topology of a real-time event queue. (This was tested with Python 3.7.3).