#  Setup
import vobject
import datetime


# This part works fine
cal=vobject.iCalendar()
cal.add('vevent').add('dtstart').value = datetime.datetime(2010,3,15,20)
cal.vevent.add('rrule').value="FREQ=WEEKLY"
print "Same content for every test:"
cal.prettyPrint()
print "You can access rruleset from the event in the calendar:"
incidence_list = list(cal.vevent.rruleset[0:2])

print "about to print the first incidence_list:"
print incidence_list
print ""
# This part works too (because vevent_p is just a reference to a vevent inside
# an icalendar object?)

print "And you can access rruleset from a reference to the vevent object in the calendar:"
event_object = cal.vevent
event_object.prettyPrint()
incidence_list2 = list(event_object.rruleset[0:2])
print "about to print the second incidence_list:"
print incidence_list2
print ""

print "But, you can't access rruleset from a standalone vevent object. Why?"
new_ev_object = vobject.newFromBehavior('vevent')
new_ev_object.add('dtstart').value = datetime.datetime(2010,3,15,20)
new_ev_object.add('rrule').value="FREQ=WEEKLY"
new_ev_object.prettyPrint()

print "About to attempt accessing the standalone object's "
print "rruleset.  This will fail."

try: 
    incidence_list3 = list(new_ev_object.rruleset[0:2])
except AttributeError:
    print "Caught an AttributeError b/c standalone vevent objects don't have a rruleset attribute"

print "Add the vevent object to the calendar, it appears the same:"
cal2 = vobject.iCalendar()
cal2.add(new_ev_object)
# Now the event is part of the calendar.
cal2.prettyPrint()

print "But, it doesn't work like the other vevent + vcalendar object I made:"

try: 
    incidence_list4 = list(cal2.vevent.rruleset[0:2])
except AttributeError:
    print "Caught an AttributeError b/c standalone vevent objects"
    print " later added to an iCal don't have a rruleset attribute"

print "But clearly all the information is there, because if I "
print "serialize and parse the broken iCal object, it works again!"

parsedCal = vobject.readOne(cal2.serialize())
parsedCal.prettyPrint()
incidence_list5 = parsedCal.vevent.rruleset[0:2]
print "about to print incidence list 5:"
print ""
print incidence_list5
print ""
print "thanks for reading!"