Yet another Tic-Tac-Toe (with AI, using tkinter)

[Yoriz]

Begin removing some duplicated parts

In the following methods

   def playZero(self, evt):
        if self.board[0] == 0 and self.gameover == False:
            self.board[0] = 1
            self.advanceTurn()

    def playOne(self, evt):
        if self.board[1] == 0 and self.gameover == False:
            self.board[1] = 1
            self.advanceTurn()

    def playTwo(self, evt):
        if self.board[2] == 0 and self.gameover == False:
            self.board[2] = 1
            self.advanceTurn()

    def playThree(self, evt):
        if self.board[3] == 0 and self.gameover == False:
            self.board[3] = 1
            self.advanceTurn()

    def playFour(self, evt):
        if self.board[4] == 0 and self.gameover == False:
            self.board[4] = 1
            self.advanceTurn()

    def playFive(self, evt):
        if self.board[5] == 0 and self.gameover == False:
            self.board[5] = 1
            self.advanceTurn()

    def playSix(self, evt):
        if self.board[6] == 0 and self.gameover == False:
            self.board[6] = 1
            self.advanceTurn()

    def playSeven(self, evt):
        if self.board[7] == 0 and self.gameover == False:
            self.board[7] = 1
            self.advanceTurn()

    def playEight(self, evt):
        if self.board[8] == 0 and self.gameover == False:
            self.board[8] = 1
            self.advanceTurn()

the only thing that changes is the board index number.
From the evt parameter, you can obtain the character of the key pressed using its char attribute.
A single function can be created to replace all of the number keys events

    def play_number(self, evt):
        index = int(evt.char)
        if self.board[index] == 0 and self.gameover == False:
            self.board[index] = 1
            self.advanceTurn()

The event binding now becomes

        self.gamecanvas.bind_all('<KeyPress-0>', self.play_number)
        self.gamecanvas.bind_all('<KeyPress-1>', self.play_number)
        self.gamecanvas.bind_all('<KeyPress-2>', self.play_number)
        self.gamecanvas.bind_all('<KeyPress-3>', self.play_number)
        self.gamecanvas.bind_all('<KeyPress-4>', self.play_number)
        self.gamecanvas.bind_all('<KeyPress-5>', self.play_number)
        self.gamecanvas.bind_all('<KeyPress-6>', self.play_number)
        self.gamecanvas.bind_all('<KeyPress-7>', self.play_number)
        self.gamecanvas.bind_all('<KeyPress-8>', self.play_number)

This also has repeated code that only the number changes and can be replaced with

        for number in range(9):
            self.gamecanvas.bind_all(f'<KeyPress-{number}>', self.play_number)

---

The remaining key binds

        self.gamecanvas.bind_all('<KeyPress-y>', self.restart)
        self.gamecanvas.bind_all('<KeyPress-Y>', self.restart)
        self.gamecanvas.bind_all('<KeyPress-n>', self.endgame)
        self.gamecanvas.bind_all('<KeyPress-N>', self.endgame)
        self.gamecanvas.bind_all('<KeyPress-Return>', self.closegame)

only the key character and the bind method changes, this could be done by using a tuple

        key_binds = (('y', self.restart), ('Y', self.restart),
                    ('n', self.endgame), ('N', self.endgame),
                    ('Return', self.closegame))
        for key, bind in key_binds:
            self.gamecanvas.bind_all(f'<KeyPress-{key}>', bind)

---

There is a repeated pattern here

    canvas.create_text(100, 100, text=board[0], font=('Times', 80))
    canvas.create_text(200, 100, text=board[1], font=('Times', 80))
    canvas.create_text(300, 100, text=board[2], font=('Times', 80))
    canvas.create_text(100, 200, text=board[3], font=('Times', 80))
    canvas.create_text(200, 200, text=board[4], font=('Times', 80))
    canvas.create_text(300, 200, text=board[5], font=('Times', 80))
    canvas.create_text(100, 300, text=board[6], font=('Times', 80))
    canvas.create_text(200, 300, text=board[7], font=('Times', 80))
    canvas.create_text(300, 300, text=board[8], font=('Times', 80))

that could be looped

    index = 0
    for y in (range(100, 400, 100)):
        for x in (range(100, 400, 100)):
            canvas.create_text(x, y, text=board[index], font=('Times', 80))
            index += 1