def add(self, cf_name, key, value):
    try:
        self._cassandra_driver.insert(key, value, cf_name=cf_name)
        return True
    except Exception as e:
        self._logger('VNCCassandra, unable to add {}={}, error: {}'.format(key, value, e), level=SandeshLevel.SYS_WARN)
        return False
def add(self, cf_name, key, value):
    try:
        self._cassandra_driver.insert(key, value, cf_name=cf_name)
        return True
    except Exception as e:
        self._logger('VNCCassandra, unable to add {}={}, error: {}'.format(key, value, e), level=SandeshLevel.SYS_WARN)
        return False