Daily, for 10 occurences, starting on 9-2-1997

 >>> list(rrule(DAILY, count=10,
 ...            dtstart=parse("19970902T090000")))
 [datetime.datetime(1997, 9, 2, 9, 0),
  datetime.datetime(1997, 9, 3, 9, 0),
  datetime.datetime(1997, 9, 4, 9, 0),
  datetime.datetime(1997, 9, 5, 9, 0),
  datetime.datetime(1997, 9, 6, 9, 0),
  datetime.datetime(1997, 9, 7, 9, 0),
  datetime.datetime(1997, 9, 8, 9, 0),
  datetime.datetime(1997, 9, 9, 9, 0),
  datetime.datetime(1997, 9, 10, 9, 0),
  datetime.datetime(1997, 9, 11, 9, 0)]

Every other week, 6 occurences.

 >>> list(rrule(WEEKLY, interval=2, count=6,
 ...            dtstart=parse("19970902T090000")))
 [datetime.datetime(1997, 9, 2, 9, 0),
  datetime.datetime(1997, 9, 16, 9, 0),
  datetime.datetime(1997, 9, 30, 9, 0),
  datetime.datetime(1997, 10, 14, 9, 0),
  datetime.datetime(1997, 10, 28, 9, 0),
  datetime.datetime(1997, 11, 11, 9, 0)]

Monthly on the first and last day of the month for 3 occurrences.

 >>> list(rrule(MONTHLY, count=5, bymonthday=(-1,1,),
 ...            dtstart=parse("19970902T090000")))
 [datetime.datetime(1997, 9, 30, 9, 0),
  datetime.datetime(1997, 10, 1, 9, 0),
  datetime.datetime(1997, 10, 31, 9, 0),
  datetime.datetime(1997, 11, 1, 9, 0),
  datetime.datetime(1997, 11, 30, 9, 0)]