How to use the attrs.Attrs function in attrs

ADVERTISED = [Attrs.CradleService]
  # SERVICES = [Attrs.DeviceService]
  SERVICES = [Attrs.CradleService]
  CHARACTERISTICS = [Attrs.AuthenticationCode, Attrs.Command, Attrs.Response, Attrs.ShareMessageReceiver, Attrs.ShareMessageResponse, Attrs.HeartBeat, Attrs.DeviceService, Attrs.PowerLevel]

  UART_SERVICE_UUID = Attrs.CradleService
  TX_CHAR_UUID = Attrs.Command
  RX_CHAR_UUID = Attrs.Response
  pass
class Share2UART (OriginalUART):
  # ADVERTISED = [Attrs.CradleService2]
  # ADVERTISED = [Attrs.VENDOR_UUID]
  ADVERTISED = [Attrs.VENDOR_UUID]
  # SERVICES = [Attrs.DeviceService]
  # SERVICES = [Attrs.CradleService2, Attrs.VENDOR_UUID]
  SERVICES = [Attrs.VENDOR_UUID, Attrs.DeviceService]
  # CHARACTERISTICS = [Attrs.AuthenticationCode2, Attrs.Command2, Attrs.Response2, Attrs.ShareMessageReceiver2, Attrs.ShareMessageResponse2, Attrs.HeartBeat2, Attrs.DeviceService, Attrs.PowerLevel]
  CHARACTERISTICS = [ ]

  HEARTBEAT_UUID = Attrs.HeartBeat2
  # UART_SERVICE_UUID = Attrs.CradleService2
  UART_SERVICE_UUID = Attrs.VENDOR_UUID
  TX_CHAR_UUID = Attrs.ShareMessageReceiver2
  RX_CHAR_UUID = Attrs.ShareMessageResponse2
  SendDataUUID = Attrs.ShareMessageReceiver2
  RcveDataUUID = Attrs.ShareMessageResponse2
  CommandUUID  = Attrs.Command2
  ResponseUUID = Attrs.Response2
  AUTH_UUID    = Attrs.AuthenticationCode2
  def __init__(self, device, **kwds):
      """Initialize UART from provided bluez device."""
      # Find the UART service and characteristics associated with the device.

import Adafruit_BluefruitLE
from Adafruit_BluefruitLE.services import UART as OriginalUART
import Queue
import uuid
import time
from attrs import Attrs
import logging
log = logging.getLogger(__name__)

class ShareUART (OriginalUART):
  ADVERTISED = [Attrs.CradleService]
  # SERVICES = [Attrs.DeviceService]
  SERVICES = [Attrs.CradleService]
  CHARACTERISTICS = [Attrs.AuthenticationCode, Attrs.Command, Attrs.Response, Attrs.ShareMessageReceiver, Attrs.ShareMessageResponse, Attrs.HeartBeat, Attrs.DeviceService, Attrs.PowerLevel]

  UART_SERVICE_UUID = Attrs.CradleService
  TX_CHAR_UUID = Attrs.Command
  RX_CHAR_UUID = Attrs.Response
  pass
class Share2UART (OriginalUART):
  # ADVERTISED = [Attrs.CradleService2]
  # ADVERTISED = [Attrs.VENDOR_UUID]
  ADVERTISED = [Attrs.VENDOR_UUID]
  # SERVICES = [Attrs.DeviceService]
  # SERVICES = [Attrs.CradleService2, Attrs.VENDOR_UUID]
  SERVICES = [Attrs.VENDOR_UUID, Attrs.DeviceService]
  # CHARACTERISTICS = [Attrs.AuthenticationCode2, Attrs.Command2, Attrs.Response2, Attrs.ShareMessageReceiver2, Attrs.ShareMessageResponse2, Attrs.HeartBeat2, Attrs.DeviceService, Attrs.PowerLevel]

UART_SERVICE_UUID = Attrs.CradleService
  TX_CHAR_UUID = Attrs.Command
  RX_CHAR_UUID = Attrs.Response
  pass
class Share2UART (OriginalUART):
  # ADVERTISED = [Attrs.CradleService2]
  # ADVERTISED = [Attrs.VENDOR_UUID]
  ADVERTISED = [Attrs.VENDOR_UUID]
  # SERVICES = [Attrs.DeviceService]
  # SERVICES = [Attrs.CradleService2, Attrs.VENDOR_UUID]
  SERVICES = [Attrs.VENDOR_UUID, Attrs.DeviceService]
  # CHARACTERISTICS = [Attrs.AuthenticationCode2, Attrs.Command2, Attrs.Response2, Attrs.ShareMessageReceiver2, Attrs.ShareMessageResponse2, Attrs.HeartBeat2, Attrs.DeviceService, Attrs.PowerLevel]
  CHARACTERISTICS = [ ]

  HEARTBEAT_UUID = Attrs.HeartBeat2
  # UART_SERVICE_UUID = Attrs.CradleService2
  UART_SERVICE_UUID = Attrs.VENDOR_UUID
  TX_CHAR_UUID = Attrs.ShareMessageReceiver2
  RX_CHAR_UUID = Attrs.ShareMessageResponse2
  SendDataUUID = Attrs.ShareMessageReceiver2
  RcveDataUUID = Attrs.ShareMessageResponse2
  CommandUUID  = Attrs.Command2
  ResponseUUID = Attrs.Response2
  AUTH_UUID    = Attrs.AuthenticationCode2
  def __init__(self, device, **kwds):
      """Initialize UART from provided bluez device."""
      # Find the UART service and characteristics associated with the device.
      log = logging.getLogger(__name__)
      self.log = log.getChild('uart')
      self._uart = device.find_service(self.UART_SERVICE_UUID)
      log.info("UART %s", self._uart)