Doing date/time + TZ math in python

[wittempj@hotmail.com]

Joshua J. Kugler wrote:
> I've read docs (datetime, time, pytz, mx.DateTime), googled, and
> experimented.  I still don't know how to accomplish what I want to
> accomplish.
>
> I'm loading up a bunch of date/time data that I then need to do math on to
> compare it to the current date/time.  I can get the current time easily
> enough:
>
> currentTime = datetime.datetime.now(pytz.timezone('America/Anchorage'))
>
> Then, I want to import data/time pairs that are in "%Y-%m-%d %H:%M:%S"
> format.
>
> So, I do:
>
> For each loop, extract time data, blah, blah, then:
> readingTime = datetime.datetime(rYr, rMo, rDay, rHr, rMin, rSec,
> tzinfo=pytz.timezone('America/Anchorage'))
>
> The problem is, how do I create a datetime object and tell it that it's
> America/Anchorage *daylight savings time* instead of whatever the system is
> currently set at?  pytz only has America/Anchorage, and I saw no way to
> tell it explicitly that the timezone is in Daylight instead of Standard
> time (e.g. using AKST vs. AKDT for the time zone).
>
> I'm sure there is a way to do it, and I'm sure it's quite simple, but it
> hasn't jumped out at me yet.  Is there a module that I haven't seen that
> would be better suited for this?
>
> Thanks!
>
> j
>
> --
> Joshua Kugler
> Lead System Admin -- Senior Programmer
> http://www.eeinternet.com
> PGP Key: http://pgp.mit.edu/  ID 0xDB26D7CE
>
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It looks like3 you're 9 hours in this example:
http://docs.python.org/lib/datetime-tzinfo.html, see e.g.
http://www.worldtimezone.com/index12.php