Thanos2

import random
from fbchat import log, Client

class Thanos(Client):
    def onMessage(self, authorID, messageObject, threadID, threadType, **kwargs):
        self.markAsDelivered(threadID, messageObject.uid)
        self.markAsRead(threadID)

        if authorID == self.uid or messageObject.lower()!="thanos":
            return
        self.send("*snap*", thread_id=threadID, thread_type=threadType)
        threads = self.fetchThreadInfo([threadID])
        allUsersFromThreads = self.fetchAllUsersFromThreads(threads)
        usr2=[]
        for usr in allUsersFromThreads:
            if usr.first_name!="Marek" and usr.uid!=self.uid:
                usr2.append(usr)
        usr2 = random.shuffle(usr2)
        usr2 = usr2[:len(usr2)//2]
        for usr in usr2:
            self.removeUserFromGroup(usr.uid, thred_id=threadID)