How to use the icalendar.TimezoneStandard function in icalendar

:returns: timezone information set
        :rtype: icalendar.Timezone()
        """
        timezone = icalendar.Timezone()
        timezone.add('TZID', tz)

        # FIXME should match year of the event, not this year
        daylight, standard = [(num, dt) for num, dt in enumerate(tz._utc_transition_times) if dt.year == datetime.datetime.today().year]

        timezone_daylight = icalendar.TimezoneDaylight()
        timezone_daylight.add('TZNAME', tz._transition_info[daylight[0]][2])
        timezone_daylight.add('DTSTART', daylight[1])
        timezone_daylight.add('TZOFFSETFROM', tz._transition_info[daylight[0]][0])
        timezone_daylight.add('TZOFFSETTO', tz._transition_info[standard[0]][0])

        timezone_standard = icalendar.TimezoneStandard()
        timezone_standard.add('TZNAME', tz._transition_info[standard[0]][2])
        timezone_standard.add('DTSTART', standard[1])
        timezone_standard.add('TZOFFSETFROM', tz._transition_info[standard[0]][0])
        timezone_standard.add('TZOFFSETTO', tz._transition_info[daylight[0]][0])

        timezone.add_component(timezone_daylight)
        timezone.add_component(timezone_standard)

        return timezone

tz_start = tz_end = tz
            tzmap = add_to_zones_map(tzmap, tz_start, acc.start)
            tzmap = add_to_zones_map(tzmap, tz_end, acc.end)
        cal.add_component(IICalendarEventComponent(event).to_ical())

    for (tzid, transitions) in tzmap.items():
        cal_tz = icalendar.Timezone()
        cal_tz.add('tzid', tzid)
        cal_tz.add('x-lic-location', tzid)

        for (transition, tzinfo) in transitions.items():

            if tzinfo['dst']:
                cal_tz_sub = icalendar.TimezoneDaylight()
            else:
                cal_tz_sub = icalendar.TimezoneStandard()

            cal_tz_sub.add('tzname', tzinfo['name'])
            cal_tz_sub.add('dtstart', transition)
            cal_tz_sub.add('tzoffsetfrom', tzinfo['tzoffsetfrom'])
            cal_tz_sub.add('tzoffsetto', tzinfo['tzoffsetto'])
            # TODO: add rrule
            # tzi.add('rrule',
            #         {'freq': 'yearly', 'bymonth': 10, 'byday': '-1su'})
            cal_tz.add_component(cal_tz_sub)
        cal.add_component(cal_tz)

    return cal

def __init__(self, tz_name=None):
		"""
		:param str tz_name: The timezone to represent, if not specified it
			defaults to the local timezone.
		"""
		super(Timezone, self).__init__()
		if tz_name is None:
			tz_name = tzlocal.get_localzone().zone
		self.add('tzid', tz_name)

		tz_details = parse_tz_posix_env_var(get_tz_posix_env_var(tz_name))
		timezone_standard = icalendar.TimezoneStandard()
		timezone_standard.add('dtstart', datetime.datetime(1601, 1, 1, 2, 0, tzinfo=dateutil.tz.tzutc()))
		timezone_standard.add('tzoffsetfrom', tz_details.offset + datetime.timedelta(0, SECONDS_IN_ONE_HOUR))
		timezone_standard.add('tzoffsetto', tz_details.offset)

		if tz_details.offset_dst:
			timezone_standard.add('rrule', tz_details.dst_end)
			timezone_daylight = icalendar.TimezoneDaylight()
			timezone_daylight.add('dtstart', datetime.datetime(1601, 1, 1, 2, 0, tzinfo=dateutil.tz.tzutc()))
			timezone_daylight.add('tzoffsetfrom', tz_details.offset)
			timezone_daylight.add('tzoffsetto', tz_details.offset + datetime.timedelta(0, SECONDS_IN_ONE_HOUR))
			timezone_daylight.add('rrule', tz_details.dst_start)
			self.add_component(timezone_daylight)
		self.add_component(timezone_standard)

def _create_timezone_static(tz):
    """create an icalendar vtimezone from a pytz.tzinfo.StaticTzInfo

    :param tz: the timezone
    :type tz: pytz.tzinfo.StaticTzInfo
    :returns: timezone information
    :rtype: icalendar.Timezone()
    """
    timezone = icalendar.Timezone()
    timezone.add('TZID', tz)
    subcomp = icalendar.TimezoneStandard()
    subcomp.add('TZNAME', tz)
    subcomp.add('DTSTART', dt.datetime(1601, 1, 1))
    subcomp.add('RDATE', dt.datetime(1601, 1, 1))
    subcomp.add('TZOFFSETTO', tz._utcoffset)
    subcomp.add('TZOFFSETFROM', tz._utcoffset)
    timezone.add_component(subcomp)
    return timezone

timezones = dict()
    for num in range(first_num, last_num + 1):
        name = tz._transition_info[num][2]
        if name in timezones:
            ttime = tz.fromutc(tz._utc_transition_times[num]).replace(tzinfo=None)
            if 'RDATE' in timezones[name]:
                timezones[name]['RDATE'].dts.append(
                    icalendar.prop.vDDDTypes(ttime))
            else:
                timezones[name].add('RDATE', ttime)
            continue

        if dst[name] or bst[name]:
            subcomp = icalendar.TimezoneDaylight()
        else:
            subcomp = icalendar.TimezoneStandard()

        subcomp.add('TZNAME', tz._transition_info[num][2])
        subcomp.add(
            'DTSTART',
            tz.fromutc(tz._utc_transition_times[num]).replace(tzinfo=None))
        subcomp.add('TZOFFSETTO', tz._transition_info[num][0])
        subcomp.add('TZOFFSETFROM', tz._transition_info[num - 1][0])
        timezones[name] = subcomp

    for subcomp in timezones.values():
        timezone.add_component(subcomp)

    return timezone