def icalStr(self):
events = [(fach, dozent, raum, jahr, woche, tag, anfang, ende,
infoString)
for (a, b, fach, dozent, raum, jahr, woche, tag, anfang,
ende, infoString) in self.eventTupelList]
events = list(set(events)) # remove duplicates
ical = Icalendar(events)
return ical.icalStr()
