> Serhiy: Is there a reason not to use the functools.total_ordering decorator on TimerHandle, so you can get rid of __le__/__ge__/__gt__ rather than fixing them 
> individually?

I strongly agree with this suggestion, unless there's some unique behavior with TimerHandle objects which would prevent this from being viable. IMO, the @total_ordering decorator should be used as much as practically possible. Individually specifying all of the rich comparisons when we don't have to adds a significant maintenance cost.