[Python-Dev] dateutil (original) (raw)

Robert Brewer fumanchu at amor.org
Thu Mar 11 13:12:52 EST 2004

Gustavo Niemeyer wrote:

Being a carefully developed superset (as it offers more features and less restrictions) of the iCal RFC regarding RRULEs, I belive you won't find any equivalent work (in terms of speed and functionality).

> http://www.aminus.org/rbre/python/recur.py > http://www.aminus.org/rbre/python/testrecur.py > Every example may be easily implemented with dateutil's rrule, as the above module is a simple implementation of interval based recurrences. As a counter example, rrule is able to do something like: rrule(FREQYEARLY,bymonth=8,bymonthday=13,byweekday=FR) Meaning "dates with a friday 13th in august", for example. Notice that this is also a simple one. There are more complex ones involving cross-year weekly periods with random week starting dates and ISO week numbers, for example.

As the author of the module Skip mentioned (and awfully proud to be noticed :) I have to concur; I actually prefer the iCal RFC, but didn't have time back then to pursue implementing such a large spec. I've been hoping someone would write DateUtil for me. ;)

The big win for my apps would be the inverse of rrulestr(); that is, having constructed an rrule, give me the string according to the RFC (I didn't see this in a quick perusal of the wiki page). This would let me easily offer recurring events to my Outlook users from a webpage, for example.

I like the generator I wrote, but that should be easy enough to wrap around rrules. Ditto for the natural-language parser.

Robert Brewer MIS Amor Ministries fumanchu at amor.org

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