def _load_csv(self, value):
        """Return a class:`csv.DictReader` instance for value passed in.

        :param str value: The CSV value
        :rtype: csv.DictReader

        """
        csv = self._maybe_import('csv')
        buff = io.StringIO() if _PYTHON3 else io.BytesIO()
        buff.write(value)
        buff.seek(0)
        dialect = csv.Sniffer().sniff(buff.read(1024))
        buff.seek(0)
        return csv.DictReader(buff, dialect=dialect)
Return a class:`csv.DictReader` instance for value passed in.

        :param str value: The CSV value
        :rtype: csv.DictReader