On Tue, Jul 28, 2015 at 8:11 AM, Tim Peters
[Tim]
timedelta objects only store days, seconds, and microseconds,
[Lennart Regebro
] Except that they don't actually store days. They store 24 hour periods,
Not really. A timedelta is truly an integer number of microseconds, and that's all.
That's what I said. Timedeltas, internally assume that 1 day is 24 hours. Or 86400000 microseconds. That's the assumption internally in the timedelta object. The problem with that being that in the real world that's not true.
24 hours is 24 hours at any time in _any_ time zone, ignoring leap seconds. timedeltas are durations, not points in time. "time zones" make no sense applied to durations.
My point exactly. And should not then adding 86400000 microseconds to a datetime actually result in a datetime that happens 86400000 microseconds later?
ie, it assumes that one day is always 24 hours.
That's really not what it's doing
That is really exactly what the timedelta is doing, as you yourself, just a few lines above say.
used in explanations. What somedatetime+timedelta really does is simpler than that: it adds the number of microseconds represented by the timedelta to somedatetime,
No it doesn't.