stdtypes.py 文件源码

def format(self, value, property, context):
        if isinstance(value, datetime.datetime):
            if value.tzinfo:
                # DST ? ???? ???.
                value = value.replace(tzinfo=timezone.utc) - value.utcoffset()
            return int(calendar.timegm(value.timetuple())) + (value.microsecond / 1000000.0)
        elif isinstance(value, datetime.time):
            seconds = value.hour * 3600 + value.minute * 60 + value.second
            if value.tzinfo:
                # DST ? ???? ???.
                seconds -= value.utcoffset().total_seconds()
            return seconds % 86400 + (value.microsecond / 1000000.0)
        elif isinstance(value, datetime.date):
            return calendar.timegm(value.timetuple())
        else:
            raise ValueError()