def METHOD_NAME(self, attr_path):
    retval = 'ERR'
    if (not os.path.isfile(attr_path)):
        return retval
    try:
        with open(attr_path, 'r') as fd:
            retval = fd.read()
    except Exception:
        logging.error("Unable to open ", attr_path, " file !")
    retval = retval.rstrip('\r\n')
    return retval