Using API v2

def get_devicealert():
    value_list = []
    cursor = conn.cursor()
    #devicealert = chunker(api_instance.get_alert_list,'needMessage:"true", cleared:"*"')
    devicealert = chunker(api_instance.get_alert_list,'custom_Columns:"snow_company_sys_id"')
    for i in devicealert:
        for c in i.items:
            print(c.custom_columns)
        query = """INSERT INTO LMDeviceAlert(Internal_ID, chain,id, Monitor_Object_ID, Monitor_Oobject_Name, Monitor_Object_Type, [Rule], Rule_ID, Severity, Start_Epoch, End_Epoch, Acked_Epoch, Alert_Value, Ack_Comment, Acked, Instance_ID, Instance_Name, SDT, Detail_Message)
        values(%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)"""
        value = (
            i.internal_id,
            i.chain,
            i.id,
            i.monitor_object_id,
            i.monitor_object_name,
            i.monitor_object_type,
            i.rule,
            i.rule_id,
            #The alert severity, where 2=warning, 3=error and 4=critical
            i.severity,
            time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(i.start_epoch)),
            time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(i.end_epoch)),
            time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(i.acked_epoch)),
            i.alert_value.replace("'", ""),
            i.ack_comment,
            i.acked,
            i.instance_id,
            i.instance_name,
            str(i.sdt).replace("'", ""),
            str(i.detail_message).replace("'", "")
            )
        value_list.append(value)
    try:
        cursor.executemany(query, value_list)
        conn.commit()
    except:
        print('DevicesAlert\nQuery={}\n'.format(query, value_list))
        logging.exception('DevicesAlert\nQuery={}\n'.format(value))    
    cursor.close() 

I may have the placement wrong, but the error is "Alert' object has no attribute 'items. Chunker is a function that executes the call until all records are obtained and exists to address the 1k record limit.