Please don't abandon this discussion. The behavior we're discussing is clearly illogical and useless.

If we simply removed the __nonzero__ behavior, and it did what user-created types do, then it would perform as I would expect it to.

Consider also that this time has no special significance, unlike the special cases of 0, (), {}, etc. This is true also for any arbitrarily zeroed unit, such as temperature (C or F), and including datetime, date, and time. Even zero in those cases (however that is defined) is simply an arbitrary point, and not the same as a nonzero value.

This is completely illogical behavior, and, IMO, is a bug.

Ryan