RDATE not working: getrruleset returns empty generator

[Unrud]

If RDATE is used, getrruleset returns an empty generator.

Example:

import vobject
s="""\
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Mozilla.org/NONSGML Mozilla Calendar V1.1//EN
BEGIN:VTIMEZONE
TZID:Europe/Paris
BEGIN:STANDARD
DTSTART:19701025T030000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZNAME:CET
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:19700329T020000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
TZNAME:CEST
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:event
DTSTART;TZID=Europe/Paris:20170601T080000
DTEND;TZID=Europe/Paris:20170601T090000
CREATED:20170601T060000Z
DTSTAMP:20170601T060000Z
LAST-MODIFIED:20170601T060000Z
RDATE;TZID=Europe/Paris:20170701T080000
SUMMARY:event
TRANSP:OPAQUE
X-MOZ-GENERATION:1
END:VEVENT
END:VCALENDAR"""
o = vobject.readOne(s)
r = o.vevent.getrruleset(addRDate=True)
print(list(r))

Output: []

[wpercy]

This looks like a Python 2/3 compatibility issue - it works for me on Python 2.7.12 but not on 3.6.1.

[Unrud]

it works for me on Python 2.7.12

I get the following result in Python 2:

[datetime.datetime(2017, 7, 1, 8, 0, tzinfo=<tzicalvtz 'Europe/Paris'>)]

It only includes the RDATE but not DTSTART. I expected that it is included because of addRDate=True.

[wpercy]

Yeah, it looks like it only actually adds the DTSTART value if there's exists an RRULE property, I'm looking into it now.