TicTacToeVersioC

import os

os.system("cls")

board = [" ", " ", " ", " ", " ", " "," ", " ", " ", " "]
space1 = "                    " #20 merkkiä
space2 = "          " #10 merkkiä
space3 = "   " #3 merkkiä

def display_game(board):
    print("Tässä tilanne" + space2 + "Tässä ohje valintaan")
    print(space3 + board[7] + "|" + board[8] + "|" + board[9] + space1 + "7|8|9")
    print(space3 + board[4] + "|" + board[5] + "|" + board[6] + space1 + "4|5|6")
    print(space3 + board[1] + "|" + board[2] + "|" + board[3] + space1 + "1|2|3")
    #check_winner()

def sijainnin_valinta(board):
    choice = "Wrong"
    while choice not in ["1", "2", "3", "4", "5", "6", "7", "8", "9"]:
        choice = input("Valitse sijainti (1,2,3,4,5,6,7,8,9): ")
        if choice not in ["1", "2", "3", "4", "5", "6", "7", "8", "9"]:
            print("Väärä valinta!")
        elif board[int(choice)] == "X" or board[int(choice)] == "O":
            choice = "Wrong"
            print("Varattu ruutu!")
    return int(choice)

def valinnan_muutos(board, sijainti, phase):
    if phase%2 == 0:
        board[sijainti] = "O"
    else:
        board[sijainti] = "X"
    return board

def gameon_choice():
    choice = "Wrong"
    while choice not in ["K", "E"]:
        choice = input("Haluatko jatkaa pelaamista K/E): ")
        if choice not in ["K", "E"]:
            print("Väärä valinta!")
    if choice == "K":
        return True
    else:
        return False

def pelimoottori(board):
    game_on = True #peli jatkuu niin kauan kuin tämä on True
    game_won = " "
    phase = 1 #pariton tarkoittaa pelaajan 1 vuoroa, parillinen pelaajan 2 vuoroa
    while game_on: #peli-silmukka, joka jatkuu kunnes game_on saa arvon False
        os.system("cls")
        display_game(board)
        sijainti = sijainnin_valinta(board)
        board = valinnan_muutos(board, sijainti, phase)
        phase += 1
        os.system("cls")
        display_game(board)
        game_won = check_winner()
        if game_won != " ":
            win(game_won)
            game_on = False
        if phase == 10:
            print("tasuri!")
            game_on = gameon_choice()
            if game_on == True:
                board = nollaa_board()
            else:
                return

def check_winner():
    winner = " "
    if board[7] == board[8] == board[9] == "X":
        winner == "X"
    if board[7] == board[8] == board[9] == "O":
        winner == "O"
    if board[5] == "X":
        winner == "X"
    return winner

def win(game_won):
    input("jee")
    print(f"Game won by player {game_won}!!!")

def nollaa_board():
    return [" ", " ", " ", " ", " ", " "," ", " ", " ", " "]

pelimoottori(board)

game_on = gameon_choice()