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I could not find any nice examples of using the vobject class to filter an icalendar file. Here is what I got to work. I'm sure there is a nicer way. This strips all of the valarm subevents (reminders) from an icalendar file.
import vobject import sys cal=vobject.readOne(sys.stdin) for ev in cal.vevent_list: if ev.contents.has_key(u'valarm'): del ev.contents[u'valarm'] print cal.serialize()