Is there a way to introduce a time delay in the middle of an event handler? (Tk Python)

Question

I was making a tic-tac-toe game and I wanted to simulate that the computer is "thinking" ,so I thought about introducing a delay with time.sleep() . However, giving how my event reacting to any of the 9 squares clicking is designed, I couldn't interrupt the callback and the delay takes place after the whole body is executed:

def on_button_click_event(event):
    if current_board.checkAvailable(event.widget):
        current_board.user_move(event)
        time.sleep(1)
        current_board.checkForVictory()
        if not current_board.end:
            current_board.computer_move()
            current_board.checkForVictory()
    else:
        info.config(text="Already occupied!",font="Comic 14")

Now this makes the program wait 1 sec ... then executes both user_move and computer_move at the same time.I wasnted to execute the user_move -> wait 1 sec or so -> then execute computer_move. I tried to put it inside the user_move callback or computer_move callback but the result is the same.

From what I found out online, somehow using time.delay() delays the execution of the thread as a whole and that might be the problem.

So I was looking forward to know if there is other function/method that does what I am asking or if there could be a better approach to somehow separate the events. (I thought about this one but considering what I have learned so far including the computer_move after a user_move in the event handler was the best choice I came with ).

I will leave my full program's code here:

import tkinter as tk
from tkinter import messagebox
import random
import time
from tkinter import simpledialog

from numpy import imag


class board:

    def __init__(self):
            self.__available=[i for i in range(1,10)]
            self.__matches= 
   {frame1:1,frame2:2,frame3:3,frame4:4,frame5:5,frame6:6,frame7:7,frame8:8,frame9:9}
            self.__matches_reversed= 
   {1:frame1,2:frame2,3:frame3,4:frame4,5:frame5,6:frame6,7:frame7,8:frame8,9:frame9}
            self.__associations= 
   {1:None,2:None,3:None,4:None,5:None,6:None,7:None,8:None,9:None}
            global coputer_begins
            self.end=False
            if computer_begins:
            self.computer_move()
        
    def lenAvailable(self):
        return len(self.__available)

    def checkAvailable(self,widget):
        return self.__matches[widget] in self.__available

    def checkForVictory(self):
            info.config(text="The game continues!",font="Comic 14")
            associacions=list(self.__associations.values())
            print(associacions)
            o=['o','o','o']
            x=['x','x','x'] 
            won=None

            for i in range(0,9,3):
                if associacions[i:i+3] == o:
                    won=False
                    for j in range(i,i+3):
                        self.__matches_reversed[j+1].config(image=object_photo_ored)
                    break
                elif associacions[i:i+3] == x:
                    won=True
                    for j in range(i,i+3):
                        self.__matches_reversed[j+1].config(image=object_photo_xred)
                    break
            if won == None:
                for i in range(3):
                    if associacions[i:i+9:3] == o:
                        for j in range(i,i+9,3):
                            self.__matches_reversed[j+1].config(image=object_photo_ored)
                        won=False
                        break
                    elif associacions[i:i+9:3] == x:
                        for j in range(i,i+9,3):
                            self.__matches_reversed[j+1].config(image=object_photo_xred)
                        won=True
                        break
            if won == None:
                if associacions[0:9:4] == o:
                    for j in range(0,9,4):
                            self.__matches_reversed[j+1].config(image=object_photo_ored)
                    won=False
                elif associacions[0:9:4] == x:
                    for j in range(0,9,4):
                            self.__matches_reversed[j+1].config(image=object_photo_xred)
                    won=True
            if won == None:
                prov=[]+[associacions[2]]+[associacions[4]]+[associacions[6]]
                if prov == o:
                    for j in prov:
                        self.__matches_reversed[j+1].config(image=object_photo_ored)
                    won=False
                elif prov == x:
                    for j in prov:
                        self.__matches_reversed[j+1].config(image=object_photo_xred)
                    won=True
            if won == True:
                self.end=True
                unbindall()
                info.config(text="User won!",font="Comic 14")
            elif won == False:
                self.end=True
                unbindall()
                info.config(text="Computer won!",font="Comic 14")
            elif current_board.lenAvailable():
                info.config(text="Continue!",font="Comic 14")
            else:
                self.end=True
                unbindall()
                info.config(text="Tie!",font="Comic 14")



    def computer_move(self):
        move = random.choice(self.__available)
        #move = simpledialog.askinteger("s","s")
        self.__matches_reversed[move].config(imag = object_photo_o)
        self.__available.remove(move)
        self.__associations[move]="o"
        print(self.__associations)
        print(self.__available)
    

    def user_move(self,event):
        move = self.__matches[event.widget]
        print(move)
        print(type(move))
        event.widget.config(image=object_photo_x)
        print(self.__available)
        self.__available.remove(move)
        self.__associations[move] = "x"
        print(self.__associations)
        print(self.__available)
        time.sleep(1)
    

def unbindall():
    frame1.unbind("<Button-1>")
    frame2.unbind("<Button-1>")
    frame3.unbind("<Button-1>")
    frame4.unbind("<Button-1>")
    frame5.unbind("<Button-1>")
    frame6.unbind("<Button-1>")
    frame7.unbind("<Button-1>")
    frame8.unbind("<Button-1>")
    frame9.unbind("<Button-1>")


def on_button_click_event(event):
    if current_board.checkAvailable(event.widget):
        current_board.user_move(event)
        time.sleep(1)
        current_board.checkForVictory()
        if not current_board.end:
            current_board.computer_move()
            current_board.checkForVictory()
    else:
        info.config(text="Already occupied!",font="Comic 14")






main_window = tk.Tk()
main_window.geometry("460x650")
main_window.config(bg="#CCCCCC")
main_window.title("X si O")

#THIS PART IS WHERE I CREATED PHOTOS AND LABELS

object_photo_x = tk.PhotoImage(file="C:\\Users\\Flavius\\Documents\\Visual Studio 2019\\ticandtoe\\x.png")
object_photo_o = tk.PhotoImage(file="C:\\Users\\Flavius\\Documents\\Visual Studio 2019\\ticandtoe\\o.png")
object_photo_xred = tk.PhotoImage(file="C:\\Users\\Flavius\\Documents\\Visual Studio 2019\\ticandtoe\\xred.png")
object_photo_ored = tk.PhotoImage(file="C:\\Users\\Flavius\\Documents\\Visual Studio 2019\\ticandtoe\\ored.png")

frame1=tk.Label(main_window, bg="#FFFFFF")
frame1.place(x=50,y=250 ,height=110, width=110)
i1=frame1.bind("<Button-1>",on_button_click_event)

frame2=tk.Label(main_window, bg="#FFFFFF")
frame2.place(x=175,y=250, height=110, width=110)
i2=frame2.bind("<Button-1>",on_button_click_event)

frame3=tk.Label(main_window, bg="#FFFFFF")
frame3.place(x=300,y=250, height=110, width=110)
i3=frame3.bind("<Button-1>",on_button_click_event)

frame4=tk.Label(main_window, bg="#FFFFFF")
frame4.place(x=50,y=375, height=110, width=110)
i4=frame4.bind("<Button-1>",on_button_click_event)

frame5=tk.Label(main_window, bg="#FFFFFF")
frame5.place(x=175,y=375, height=110, width=110)
i5=frame5.bind("<Button-1>",on_button_click_event)

frame6=tk.Label(main_window, bg="#FFFFFF")
frame6.place(x=300,y=375,height=110, width=110)
i6=frame6.bind("<Button-1>",on_button_click_event)

frame7=tk.Label(main_window, bg="#FFFFFF")
frame7.place(x=50,y=500, height=110, width=110)
i7=frame7.bind("<Button-1>",on_button_click_event)

frame8=tk.Label(main_window, bg="#FFFFFF")
frame8.place(x=175,y=500, height=110, width=110)
i8=frame8.bind("<Button-1>",on_button_click_event)

frame9=tk.Label(main_window, bg="#FFFFFF")
frame9.place(x=300,y=500, height=110, width=110)
i9=frame9.bind("<Button-1>",on_button_click_event)

info=tk.Label(main_window, bg ="#BBBBBB",text="Player plays with X and computer with O!",font="Comic 14")
info.place(x=50,y=40,height=160,width=360) #x=50,y=40

coputer_begins=True

current_board=board()



main_window.mainloop()