[omaha] dateutils library

[Mike Hostetler]

I was struggling with some date arithmetic -- I need to take a given date
and return back the beginning and ending date of the quarter that given
date is in. Sounds fun, right? Yeah, I didn't think so either.

Someone pointed me to the dateutils library and, after getting my brain
around it, it turned out to be fairly straightforward.


from dateutil import rrule,relativedelta

   year = this_date.year
   quarters = rrule.rrule(rrule.MONTHLY,
                      bymonth=(1,4,7,10),
                      bysetpos=-1,
                      dtstart=datetime.datetime(year,1,1),
                      count=8)

   first_day = quarters.before(this_date)
   last_day =  (quarters.after(this_date)-relativedelta.relativedelta(days=1)

                More info on dateutil here:
http://labix.org/python-dateutil

Anyone else ever use it?


-- 
Mike Hostetler
SquarePeg Systems
http://www.squarepegsystems.com