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Does there exist a stand-alone module to expand RFC-2445 recurrence
rule? The idea is to start with a string like:

"RRULE:FREQ=WEEKLY;COUNT=6;INTERVAL=2;BYDAY=FR "

and derive a list of dates on which that event occurs.

I'm aware of http://codespeak.net/icalendar/, but that solves a much
larger problem (parsing ics files) and I can't see how to tease out just
this one function from that module.

O.B. Murithi suggested I look at http://labix.org/python-dateutil, which turns out to have exactly what I'm looking for. Thanks!

from dateutil.rrule import rrulestr
from dateutil.parser import parse

rule = rrulestr("FREQ=WEEKLY;COUNT=6;INTERVAL=2;BYDAY=FR" ,
dtstart=parse("2012-06-15"))
for date in rule:
print date

../rrule.py
2012-06-15 00:00:00
2012-06-29 00:00:00
2012-07-13 00:00:00
2012-07-27 00:00:00
2012-08-10 00:00:00
2012-08-24 00:00:00