tic.py

from tkinter import *

root = Tk()
root.geometry("330x550")
root.title("Welcome to Tic Tac Toe game by Mansi")

root.resizable(0, 0)

frame1 = Frame(root)
frame1.pack()
titleLabel = Label(frame1, text="Tic Tac Toe Game", font=("Broadway", 20), fg="pink", width=16)
titleLabel.grid(row=0, column=0)

optionFrame = Frame(root)
optionFrame.pack()

frame2 = Frame(root)
frame2.pack()

board = {1: " ", 2: " ", 3: " ",
         4: " ", 5: " ", 6: " ",
         7: " ", 8: " ", 9: " "}

turn = "x"
game_end = False
mode = "singlePlayer"

def changeModeToSinglePlayer():
    global mode
    mode = "singlePlayer"
    singlePlayerButton["bg"] = "lightgreen"
    multiPlayerButton["bg"] = "lightgrey"


def changeModeToMultiplayer():
    global mode
    mode = "multiPlayer"
    multiPlayerButton["bg"] = "lightgreen"
    singlePlayerButton["bg"] = "lightgrey"


def updateBoard():
    for key in board.keys():
        buttons[key - 1]["text"] = board[key]


def checkForWin(player):
    # rows
    if board[1] == board[2] and board[2] == board[3] and board[3] == player:
        return True

    elif board[4] == board[5] and board[5] == board[6] and board[6] == player:
        return True

    elif board[7] == board[8] and board[8] == board[9] and board[9] == player:
        return True

    # columns
    elif board[1] == board[4] and board[4] == board[7] and board[7] == player:
        return True

    elif board[2] == board[5] and board[5] == board[8] and board[8] == player:
        return True

    elif board[3] == board[6] and board[6] == board[9] and board[9] == player:
        return True

    # diagonals
    elif board[1] == board[5] and board[5] == board[9] and board[9] == player:
        return True

    elif board[3] == board[5] and board[5] == board[7] and board[7] == player:
        return True

    return False


def checkForDraw():
    for i in board.keys():
        if board[i] == " ":
            return False

    return True


def restartGame():
    global game_end
    game_end = False
    for button in buttons:
        button["text"] = " "

    for i in board.keys():
        board[i] = " "

    titleLabel = Label(frame1, text="Tic Tac Toe Game", font=("Broadway", 20), bg="skyblue", width=15)
    titleLabel.grid(row=0, column=0)


def minimax(board, isMaximizing):
    if checkForWin("o"):
        return 1

    if checkForWin("x"):
        return -1

    if checkForDraw():
        return 0

    if isMaximizing:
        bestScore = -100

        for key in board.keys():
            if board[key] == " ":
                board[key] = "o"
                score = minimax(board, False)  # minimax
                board[key] = " "
                if score > bestScore:
                    bestScore = score

        return bestScore

    else:
        bestScore = 100

        for key in board.keys():
            if board[key] == " ":
                board[key] = "x"
                score = minimax(board, True)  # minimax
                board[key] = " "
                if score < bestScore:
                    bestScore = score

        return bestScore


def playComputer():
    bestScore = -100
    bestMove = 0

    for key in board.keys():
        if board[key] == " ":
            board[key] = "o"
            score = minimax(board, False)  # minimax
            board[key] = " "
            if score > bestScore:
                bestScore = score
                bestMove = key

    board[bestMove] = "o"

def play(event):
    global turn, game_end
    if game_end:
        return

    button = event.widget
    buttonText = str(button)
    clicked = buttonText[-1]
    if clicked == "n":
        clicked = 1
    else:
        clicked = int(clicked)

    if button["text"] == " ":
        if turn == "x":
            board[clicked] = turn
            if checkForWin(turn):
                winningLabel = Label(frame1, text=f"{turn} wins the game!!", bg="pink", font=("Arial", 25), width=16)
                winningLabel.grid(row=0, column=0, columnspan=3)
                game_end = True

            turn = "o"

            updateBoard()

            if mode == "singlePlayer":

                playComputer()

                if checkForWin(turn):
                    winningLabel = Label(frame1, text=f"{turn} wins the game!!", bg="pink", font=("Arial", 25),
                                         width=16)
                    winningLabel.grid(row=0, column=0, columnspan=3)
                    game_end = True

                turn = "x"
                updateBoard()

        else:
            board[clicked] = turn
            updateBoard()
            if checkForWin(turn):
                winningLabel = Label(frame1, text=f"{turn} wins the game!!", bg="pink", font=("Arial", 25), width=16)
                winningLabel.grid(row=0, column=0, columnspan=3)
                game_end = True
            turn = "x"

        if checkForDraw():
            drawLabel = Label(frame1, text=f"Game Draw", bg="pink", font=("Arial", 25), width=16)
            drawLabel.grid(row=0, column=0, columnspan=3)

singlePlayerButton = Button(optionFrame, text="SinglePlayer", width=13, height=1, font=("Arial", 15), bg="lightgrey",
                            command=changeModeToSinglePlayer)
singlePlayerButton.grid(row=0, column=0, columnspan=1, sticky=NW)

multiPlayerButton = Button(optionFrame, text="Multiplayer", width=13, height=1, font=("Arial", 15), bg="lightgrey",
                            command=changeModeToMultiplayer)
multiPlayerButton.grid(row=0, column=1, columnspan=1, sticky=NW)

#  First row

button1 = Button(frame2, text=" ", width=4, height=2, font=("Arial", 30), bg="skyblue")
button1.grid(row=0, column=0)
button1.bind("<Button-1>", play)

button2 = Button(frame2, text=" ", width=4, height=2, font=("Arial", 30), bg="skyblue")
button2.grid(row=0, column=1)
button2.bind("<Button-1>", play)

button3 = Button(frame2, text=" ", width=4, height=2, font=("Arial", 30), bg="skyblue")
button3.grid(row=0, column=2)
button3.bind("<Button-1>", play)

#  second row

button4 = Button(frame2, text=" ", width=4, height=2, font=("Arial", 30), bg="skyblue")
button4.grid(row=1, column=0)
button4.bind("<Button-1>", play)

button5 = Button(frame2, text=" ", width=4, height=2, font=("Arial", 30), bg="skyblue")
button5.grid(row=1, column=1)
button5.bind("<Button-1>", play)

button6 = Button(frame2, text=" ", width=4, height=2, font=("Arial", 30), bg="skyblue")
button6.grid(row=1, column=2)
button6.bind("<Button-1>", play)

#  third row

button7 = Button(frame2, text=" ", width=4, height=2, font=("Arial", 30), bg="skyblue")
button7.grid(row=2, column=0)
button7.bind("<Button-1>", play)

button8 = Button(frame2, text=" ", width=4, height=2, font=("Arial", 30), bg="skyblue")
button8.grid(row=2, column=1)
button8.bind("<Button-1>", play)

button9 = Button(frame2, text=" ", width=4, height=2, font=("Arial", 30), bg="skyblue")
button9.grid(row=2, column=2)
button9.bind("<Button-1>", play)

restartButton = Button(frame2, text="Restart Game", width=19, height=1, font=("Arial", 20), bg="lightgrey",
                       command=restartGame)
restartButton.grid(row=4, column=0, columnspan=3)

buttons = [button1, button2, button3, button4, button5, button6, button7, button8, button9]

root.mainloop()