fields.py 文件源码

def from_native(self, value):
        if value in validators.EMPTY_VALUES:
            return None

        if isinstance(value, datetime.time):
            return value

        for fmt in self.input_formats:
            if fmt.lower() == ISO_8601:
                try:
                    parsed = parse_time(value)
                except (ValueError, TypeError):
                    pass
                else:
                    if parsed is not None:
                        return parsed
            else:
                try:
                    parsed = datetime.datetime.strptime(value, fmt)
                except (ValueError, TypeError):
                    pass
                else:
                    return parsed.time()

        msg = self.error_messages['invalid'] % readable_time_formats(self.input_formats)

        raise ValidationError(msg)