tic_tac_toe.py

from tkinter import *
# Tkinter is the standard GUI library for Python. Python when combined with Tkinter provides a fast and easy way to create GUI applications. Tkinter provides a powerful object-oriented interface to the Tk GUI toolkit.

def callback(r,c):
  global person

  if person=='x' and states[r][c]==0 and stop== False:
    b[r][c].configure(text='x', fg='green',bg='black')
    states[r][c]='x'
    person='o'


  if person=='o' and states[r][c]==0 and stop==False:
    b[r][c].configure(text='o', fg='orange',bg='light green')
    states[r][c]='o'
    person='x'
    check()
def check():
  global stop
  for i in range(3):
    if states[i][0]==states[i][1]==states[i][2] !=0:
      b[i][0].config(bg='grey')
      b[i][1].config(bg='grey')
      b[i][2].config(bg='grey')
      stop=True
  for i in range(3):
    if states[0][i]==states[1][i]==states[2][i] !=0:
      b[0][i].config(bg='grey')
      b[1][i].config(bg='grey')
      b[2][i].config(bg='grey')
      stop=True
    if states[0][0]==states[1][1]==states[2][2] !=0:
      b [0][0].config(bg='grey')
      b [1][1].config(bg='grey')
      b [2][2].config(bg='grey')
      stop=True
    if states[2][0]==states[1][1]==states[0][2] !=0:
      b[2][0].config(bg='grey')
      b[1][1].config(bg='grey')
      b[0][2].config(bg='grey')
      stop=True

root= Tk()
root.title("Tic Tac Toe")

b=[[0,0,0],
   [0,0,0],
   [0,0,0]]
states=[[0,0,0],
   [0,0,0],
   [0,0,0]]

for i in range(3):
  for j in range (3):
    b[i][j]=Button(font=("Arial",80),width=4,bg='green',
    command= lambda r=i , c=j: callback(r,c))
    b[i][j].grid(row=i,column=j)
person='x'
stop=False

mainloop()