如何确定日期时间对象是否与 ical 字符串重叠？

Question

假设我有一个字符串：

cal_str = """
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20211019T000000
DTEND;TZID=America/New_York:20211019T235959
RRULE:FREQ=WEEKLY;BYDAY=SU,MO,TU,WE,TH,FR,SA
X-STATE:convenience
END:VEVENT
"""

还有一个

datetime

对象

datetime(2022, 11, 7, 4, 53, tzinfo=timezone.utc)

.

如何确认

datetime

对象落在ical字符串中？我试过使用

rules.between

但这个

datetime

应该与 ical 字符串重叠，但没有。

示例代码：

from dateutil import rrule
import pytz
from dateutil.tz import gettz
from icalendar.cal import Calendar
from datetime import datetime, timedelta, timezone

cal_str = """
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20211019T000000
DTEND;TZID=America/New_York:20211019T235959
RRULE:FREQ=WEEKLY;BYDAY=SU,MO,TU,WE,TH,FR,SA
X-STATE:convenience
END:VEVENT
"""

def test_ical(target_time):
    ical = Calendar.from_ical(cal_str)
    start_time_dt = ical.get("DTSTART").dt
    tzinfo = gettz(str(start_time_dt.tzinfo))
    start_time_dt = start_time_dt.replace(tzinfo=None).replace(tzinfo=tzinfo)
    end_time_dt = ical["DTEND"].dt if ical.get("DTEND") else None

    irrule = ical.get("RRULE")
    recurring_rule = irrule.to_ical().decode('utf-8')
    rules = rrule.rruleset()
    first_rule = rrule.rrulestr(recurring_rule, dtstart=start_time_dt)
    rules.rrule(first_rule)
    event_delta = end_time_dt - start_time_dt if end_time_dt else timedelta(days=1)
    res = rules.between(target_time - event_delta, target_time + timedelta(minutes=1))
    return res

print(test_ical(datetime(2022, 11, 7, 4, 53, tzinfo=timezone.utc)))
print(test_ical(datetime(2022, 11, 9, 4, 53, tzinfo=timezone.utc)))