from enum import Enum, unique @unique class UserActType(Enum): HELLO = 0 BYE = 1 CONFIRM = 2 NEGATE = 3 THANKYOU = 4 INFORM = 5 CREATE_MEETING = 6 UPDATE_MEETING = 7 CANCEL_MEETING = 8 MEETING_LIST = 9 FREE_TIME = 10 INVALID = -1