Created a Desktop game with Python tkinter GUI. In which 2 players can play the game by choosing 'O' or 'X'.
Code on : Tic-Tac-Toe with Python Tkinter Gui

  #tictactoe Game 
  #-----------------
  from tkinter import *
  from tkinter import messagebox
  count = 0
  root = Tk() #root = root or window or any name
  root.geometry("286x300")
  root.title("TIMEPASS GAME")
  bx1 = "1"
  bx2 = "2"
  bx3 = "3"
  bx4 = "4"
  bx5 = "5"
  bx6 = "6"
  bx7 = "7"
  bx8 = "8"
  bx9 = "9"
  
  a = Label(root,text=" X-O Game",bg="light blue", justify="center").grid(row=3,column=1,sticky = S)
  b1 = Button(root,text=" ",bg="ivory2",command= lambda :  t(1))
  b1.grid(row ='0',column="0",ipadx='40',ipady='30')
  b2 = Button(root,text=" ",bg="ivory2",command= lambda :  t(2))
  b2.grid(row ='0',column="1",ipadx='40',ipady='30')
  b3 = Button(root,text=" ",bg="ivory2",command= lambda :  t(3))
  b3.grid(row ='0',column="2",ipadx='40',ipady='30')
  
  b4 = Button(root,text=" ",bg="ivory2",command= lambda :  t(4))
  b4.grid(row ='1',column="0",ipadx='40',ipady='30')
  b5 = Button(root,text=" ",bg="ivory2",command= lambda :  t(5))
  b5.grid(row ='1',column="1",ipadx='40',ipady='30')
  b6 = Button(root,text=" ",bg="ivory2",command= lambda :  t(6))
  b6.grid(row ='1',column="2",ipadx='40',ipady='30')
  
  b7 = Button(root,text=" ",bg="ivory2",command= lambda :  t(7))
  b7.grid(row ='2',column="0",ipadx='40',ipady='30')
  b8 = Button(root,text=" ",bg="ivory2",command= lambda :  t(8))
  b8.grid(row ='2',column="1",ipadx='40',ipady='30')
  b9 = Button(root,text=" ",bg="ivory2",command= lambda :  t(9))
  b9.grid(row ='2',column="2",ipadx='40',ipady='30')
  
  player = 1
  def  t(box):
      global player
      global count
      global bx1 ,bx2,bx3,bx4,bx5,bx6,bx7,bx8,bx9
      
      count = count+1
  
      if box == 1 and player ==1:
          b1.config(text="O")
          b1.configure(state=DISABLED)
          player = 2
          bx1 = "O"
      elif box == 1 and player == 2:
          b1.config(text="X")
          b1.configure(state=DISABLED)
          player =1
          bx1 = "X"
      elif box == 2 and player ==1:
          b2.config(text="O")
          b2.configure(state=DISABLED)
          player = 2
          bx2 = "O"
      elif box == 2 and player == 2:
          b2.config(text="X")
          b2.configure(state=DISABLED)
          player =1
          bx2 = "X"
      elif box == 3 and player ==1:
          b3.config(text="O")
          b3.configure(state=DISABLED)
          player = 2
          bx3 = "O"
      elif box == 3 and player == 2:
          b3.config(text="X")
          b3.configure(state=DISABLED)
          player =1
          bx3 = "X"
      elif box == 4 and player ==1:
          b4.config(text="O")
          b4.configure(state=DISABLED)
          player = 2
          bx4 = "O"
      elif box == 4 and player == 2:
          b4.config(text="X")
          b4.configure(state=DISABLED)
          player =1
          bx4 = "X"
      elif box == 5 and player ==1:
          b5.config(text="O")
          b5.configure(state=DISABLED)
          player = 2
          bx5 = "O"
      elif box == 5 and player == 2:
          b5.config(text="X")
          b5.configure(state=DISABLED)
          player =1
          bx5 = "X"
      elif box == 6 and player ==1:
          b6.config(text="O")
          b6.configure(state=DISABLED)
          player = 2
          bx6 = "O"
      elif box == 6 and player == 2:
          b6.config(text="X")
          b6.configure(state=DISABLED)
          player =1
          bx6 = "X"
      elif box == 7 and player ==1:
          b7.config(text="O")
          b7.configure(state=DISABLED)
          player = 2
          bx7 = "O"
      elif box == 7 and player == 2:
          b7.config(text="X")
          b7.configure(state=DISABLED)
          player =1
          bx7 = "X"
      elif box == 8 and player ==1:
          b8.config(text="O")
          b8.configure(state=DISABLED)
          player = 2
          bx8 = "O"
      elif box == 8 and player == 2:
          b8.config(text="X")
          b8.configure(state=DISABLED)
          player =1
          bx8 = "X"
      elif box == 9 and player ==1:
          b9.config(text="O")
          b9.configure(state=DISABLED)
          player = 2
          bx9 = "O"
      elif box == 9 and player == 2:
          b9.config(text="X")
          b9.configure(state=DISABLED)
          player =1
          bx9 = "X"
  #######################################
  
      if bx1 == bx2 == bx3 == "X" or bx4 == bx5 == bx6 == "X" or bx7 == bx8 == bx9 == "X" or bx1 == bx5 == bx9 == "X" or bx3 == bx5 == bx7 == "X" or bx1 == bx4 == bx7 == "X" or  bx2 == bx5 == bx8 == "X" or  bx3 == bx6 == bx9 == "X":
  
          player = "X"
          messagebox._show("Game end  ","Player " +player+"  Won")
          exit(0)
  
      if bx1 == bx2 == bx3 == "O" or bx4 == bx5 == bx6 == "O" or bx7 == bx8 == bx9 == "O" or bx1 == bx5 == bx9 == "O" or bx3 == bx5 == bx7 == "O" or bx1 == bx4 == bx7 == "O" or  bx2 == bx5 == bx8 == "O" or  bx3 == bx6 == bx9 == "O":
          player = "O"
          messagebox._show("Game end  ","Player " +player+"   Won")
          exit(0)
  
     
  
      if count ==9:
          messagebox._show("Game end","DRAW- Try Again")
          exit(0)
  
  
  root.mainloop()