I'm rewriting an existing python program using a 3rd party async library
to standard asyncio. That library allows one to check if a timer created
with:
timer = loop.call_later(delay, callback)
is active, i.e. not cancelled and the scheduled callback not executed yet.
I'm missing that functionality in asyncio and would like to propose:
TimerHandle.done() = True if cancelled or no longer waiting in the event
loop's queue; otherwise False
In that program sometimes a state is defined just by the mere existence
of an active timer - no state variables, no real callbacks. I find that
quite a natural mini-pattern.
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