A task per read swallowed failures, could deliver keystrokes out of order, and
at end of input returned with the reader still registered, so a level
triggered selector called it again for the same EOF. The reader queues now,
one consumer sends in order, and it is gathered with the main loop so a
failure reaches the caller.
The Console was never connected, so main_loop ran against a session that had
never been established. Input arrived on a thread that called send_data and
dropped the coroutine; the thread is gone and the loop watches stdin with
add_reader instead. The output handler was a plain function that
Console._print_data awaits.
Console.main_loop drives Session.wait_for_rsp, which is a coroutine, so it
spun without ever waiting for a packet. It is a coroutine now, and pyghmicons
runs its main under asyncio.run. pyghmiutil had the same shape around
Command.eventloop.
Markus Hilger
Jarrod Johnson