prop.py 文件源码

def __init__(self, dt):
        if not isinstance(dt, (datetime, date, timedelta, time)):
            raise ValueError('You must use datetime, date, timedelta or time')
        if isinstance(dt, datetime):
            self.params = Parameters({'value': 'DATE-TIME'})
        elif isinstance(dt, date):
            self.params = Parameters({'value': 'DATE'})
        elif isinstance(dt, time):
            self.params = Parameters({'value': 'TIME'})

        if (isinstance(dt, datetime) or isinstance(dt, time))\
                and getattr(dt, 'tzinfo', False):
            tzinfo = dt.tzinfo
            if tzinfo is not pytz.utc and\
               (tzutc is None or not isinstance(tzinfo, tzutc)):
                # set the timezone as a parameter to the property
                tzid = tzid_from_dt(dt)
                if tzid:
                    self.params.update({'TZID': tzid})
        self.dt = dt