def _valid_result(res):
    """Validate results returned by find_players"""
    (HEADER, RESULTS) = [0, 1]
    ok = (isinstance(res, (tuple, list)) and
          len(res) == 2 and
          isinstance(res[HEADER], (tuple, list)) and
          isinstance(res[RESULTS], (tuple, list)))
    if not ok:
        return False
    else:
        return True