simple.py 文件源码

def _apply(self, value):
        if isinstance(value, datetime):
            parsed = value
        elif isinstance(value, date):
            # http://stackoverflow.com/a/1937636
            parsed = datetime.combine(value, time.min)
        else:
            try:
                #
                # It's a shame we can't pass ``tzinfos`` to
                # :py:meth:`dateutil_parse.parse`; ``tzinfos`` only has
                # effect if we also specify ``ignoretz = True``, which
                # we definitely don't want to do here!
                #
                # https://dateutil.readthedocs.org/en/latest/parser.html#dateutil.parser.parse
                #
                parsed = dateutil_parse(value)
            except ValueError:
                return self._invalid_value(
                    value       = value,
                    reason      = self.CODE_INVALID,
                    exc_info    = True,
                )

        if not parsed.tzinfo:
            parsed = parsed.replace(tzinfo=self.timezone)

        # Always covert to UTC.
        aware_result = parsed.astimezone(utc)

        return (
            aware_result.replace(tzinfo=None)
                if self.naive
                else aware_result
        )