Tic_tac_toe.py

from IPython.display import clear_output

def display_board(board):
    clear_output()
    
    print(board[7] + ' | ' + board[8] +' | ' + board[9])
    
    print('-----------')
    
    print(board[4] + ' | ' + board[5] + ' | ' + board[6])
    
    print('-----------')
    
    print(board[1] + ' | ' + board[2] +' | ' + board[3])
    


def player_input():
    marker = ''
    
    while not (marker == 'X' or marker == 'O'):
        marker = input('Player 1: Do you want to be X or O? ').upper()

    if marker == 'X':
        return ('X', 'O')
    else:
        return ('O', 'X')


def place_marker(board, marker,position):
    board[position] = marker


def win_check(board,mark):
    return ((board[1]==mark and board[2]==mark and board[3]==mark)or
            (board[4]==mark and board[5]==mark and board[6]==mark)or
           (board[7]==mark and board[8]==mark and board[9]==mark)or
           (board[1]==mark and board[4]==mark and board[7]==mark)or
           (board[2]==mark and board[5]==mark and board[8]==mark)or
           (board[3]==mark and board[6]==mark and board[9]==mark)or
           (board[1]==mark and board[5]==mark and board[9]==mark)or
           (board[3]==mark and board[5]==mark and board[7]==mark))


import random

def choose_first():
    if random.randint(0,1)==0:
        return "Player 1"
    else:
        return "Player 2"


def space_check(board,position):
    return board[position]=="_"  

def full_board_check(board):
    for i in range(1,10):
        if space_check(board,i):
            return False
    return True

def player_choice(board):
    position=0
    while position not in [1,2,3,4,5,6,7,8,9] or not space_check(board,position):
        position=int(input("Choose your next position: (1-9)"))
    return position

def replay():
    return input("Do you want to play again? Enter Yes or No: ").lower().startswith("y")


print("Welcome to Tic Tac Toe!")

while True:
    board=["_"]*10
    player1_marker,player2_marker=player_input()
    
    turn=choose_first()
    print(turn+ " will go first.")
    
    play_game = input("Are you ready to play? Enter Yes or No.")
    
    if play_game.lower()=="yes":
        game_on =True
    else:
        game_on =False
    
    while game_on:
        if turn == "Player 1":
            display_board(board)
            position=player_choice(board)
            place_marker(board,player1_marker,position)
            
            if win_check(board,player1_marker):
                display_board(board)
                print("CONGRATULATIONS! YOU HAVE WON THE GAME!")
                
                game_on= False
            else:
                if full_board_check(board):
                    display_board(board)
                    print("THE GAME IS DRAW!")
                    break
                else:
                    turn="Player 2"
        else:
            display_board(board)
            position=player_choice(board)
            place_marker(board,player2_marker,position)
            
            if win_check(board,player2_marker):
                display_board(board)
                print("CONGRATULATIONS! YOU HAVE WON THE GAME!")
                
                game_on= False
            else:
                if full_board_check(board):

                    display_board(board)
                    print("THE GAME IS DRAW!")
                    break
                else:
                    turn="Player 1"
    if not replay():
        break