tictactoe

import random
from IPython.display import clear_output

def print_board(board):
    clear_output()
    print(board[6] + '|'+ board[7] +'|'+ board[8])
    print('_'+' '+ '_' +' '+ '_')
    print(board[3] + '|'+ board[4] +'|'+ board[5])
    print('_'+' '+ '_' +' '+ '_')
    print(board[0] + '|'+ board[1] +'|'+ board[2])
    
    
def playerinput(player):
    marker = raw_input(player + ' ' + "Enter X or O:")
    if marker == 'X':
        return ('X', 'O')
    elif marker == 'O':
        return ('O', 'X')


def marker_position(player, marker):
    position = raw_input(player + ' ' + "Enter marker position:")
    return (player, marker, int(position))

def insert_in_board(player, marker, position, board): 
    board[position] = marker.upper()

    
def win_loose(player, marker, board):
    if ((board[0] == marker and board[1] == marker and board[2] == marker) 
        or (board[3] == marker and board[4] == marker and board[5] == marker) 
        or (board[6] == marker and board[7] == marker and board[8] == marker) 
        or  (board[0] == marker and board[4] == marker and board[8] == marker) 
        or (board[3] == marker and board[5] == marker and board[6] == marker) 
        or (board[0] == marker and board[3] == marker and board[6] == marker) 
        or (board[1] == marker and board[4] == marker and board[7] == marker) 
        or (board[2] == marker and board[5] == marker and board[8] == marker)):
        return True

def board_full(board):
    count = 1
    for i in range(8):
        if board[i] in ('X', 'O'):
            count = count + 1
    if count == len(board):
        return True

def replay():
    choice = raw_input("Do  you want to continue to play? yes or no:")
    return choice

def choose_first():
    flip = random.randint(0,1)
    if flip == 0:
        return 'player1'
    else:
        return 'player2'
    
        #########################
        
        

board = [' '] * 9
marker = ''
player = choose_first()
player1_marker, player2_marker = playerinput(player)

while True:
    if player == 'player1':
        player, marker, pos = marker_position(player, player1_marker)    
    elif player == 'player2':
        player, marker, pos = marker_position(player, player2_marker)
    
    insert_in_board(player, marker, pos, board)
    print_board(board)
    
    
    if board_full(board):
        print ("game over, it's a tie!")
        replay = replay()
        
    if win_loose(player, marker, board):
        print (player + ' ' + 'has won the game')
        replay = replay()
        
    if player == 'player1':
        player = 'player2'
    
    elif player == 'player2':
        player = 'player1'

    
    if replay == 'no':
        break;