models.py 文件源码

def datetime_from_simple_time(cls, el, datetime_field):
        """
        The function takes a datetime_fieldname and
        returns a datetime aware of the timezone.
        Returns None if fields do not exist in el.
        """
        if (datetime_field not in el or
            el[datetime_field] is None or
            el[datetime_field] == '0000-00-00 00:00:00' or
                el[datetime_field] == ''):

            return None
        else:
            return timezone.make_aware(
                datetime.datetime.strptime(u"{} UTC".format(el[datetime_field]), "%Y-%m-%d %H:%M:%S %Z"),
                pytz.utc)