# Este codigo esta programado para la version 2.7.12 en plataforma Linux.
#
# La sintaxis de python es variable en cada version, por lo que no se
# recomienda copiar este codigo ya que es muy probable que no funcione y
# tenga que hacerle ajustes.

import os, random, sys

def getch ():
    if os.name == 'posix':
        import sys, tty, termios
        fd = sys.stdin.fileno()
        old_settings = termios.tcgetattr(fd)
        try:
            tty.setraw (sys.stdin.fileno())
            ch = sys.stdin.read(1)
        finally:
            termios.tcsetattr (fd, termios.TCSADRAIN, old_settings)
        return ch
    else:
        import msvcrt, sys
        sys.stdout.flush()
        return msvcrt.getwch()

def imprimir_cuadricula (tictactoe):
    os.system ('clear' if os.name == 'posix' else 'cls')
    print (u'      \u2554'.encode('utf-8') + '{0}{0}{0}{1}{0}{0}{0}{1}{0}{0}{0}'.format (u'\u2550'.encode('utf-8'), u'\u2566'.encode('utf-8')) + u'\u2557'.encode('utf-8'))
    print ('      {0} 1 {0} 2 {0} 3 {0}'.format(u'\u2551'.encode('utf-8')))
    print (u'      \u255A'.encode('utf-8') + '{0}{0}{0}{1}{0}{0}{0}{1}{0}{0}{0}'.format (u'\u2550'.encode('utf-8'), u'\u2569'.encode('utf-8')) + u'\u255D\n'.encode('utf-8'))
    print ('{1}{0}{3}   {1}{0}{0}{0}{2}{0}{0}{0}{2}{0}{0}{0}{3}'.format (u'\u2550'.encode('utf-8'), u'\u2554'.encode('utf-8'), u'\u2566'.encode('utf-8'), u'\u2557'.encode('utf-8')))
    for i in range (len (tictactoe)):
        if i != 0:
            print ('{1}{0}{3}   {1}{0}{0}{0}{2}{0}{0}{0}{2}{0}{0}{0}{3}'.format (u'\u2550'.encode('utf-8'), u'\u2560'.encode('utf-8'), u'\u256C'.encode('utf-8'), u'\u2563'.encode('utf-8')))
        sys.stdout.write ('{0}{1}{0}   {0}'.format (u'\u2551'.encode('utf-8'), i+1))
        for j in range (len (tictactoe[i])):
            sys.stdout.write (' ' + tictactoe[i][j] + u' \u2551'.encode('utf-8'))
        print ('')
    print ('{1}{0}{3}   {1}{0}{0}{0}{2}{0}{0}{0}{2}{0}{0}{0}{3}\n'.format (u'\u2550'.encode('utf-8'), u'\u255A'.encode('utf-8'), u'\u2569'.encode('utf-8'), u'\u255D'.encode('utf-8')))

def leer_numero (variable):
    sys.stdout.write (u'Seleccione el n\u00FAmero de '.encode('utf-8') + variable + ': ')
    sys.stdout.flush()
    tecla = ' '
    while tecla != '1' and tecla != '2' and tecla != '3':
        tecla = getch()
    print (tecla)
    return int (tecla) - 1

tictactoe = [[' ', ' ', ' '], [' ', ' ', ' '], [' ', ' ', ' ']]
ganador = ' '
juega_cpu = random.randrange (0, 2) == 1
turnos = 0
while turnos<9 and ganador!='O' and ganador!='X':
    if juega_cpu:
        i = random.randrange (0, 3)
        j = random.randrange (0, 3)
        while tictactoe[i][j]!=' ':
            i = random.randrange (0, 3)
            j = random.randrange (0, 3)
        tictactoe[i][j] = 'O'
    else:
        imprimir_cuadricula (tictactoe)
        while True:
            i = leer_numero (u'rengl\u00F3n'.encode('utf-8'))
            j = leer_numero ('columna')
            if tictactoe[i][j]!=' ':
                print (u'La casilla seleccionada ya est\u00E1 ocupada.\n'.encode('utf-8'))
            else:
                break
        tictactoe[i][j] = 'X'
    i = 0
    while ganador==' ' and i<3:
        if tictactoe[i][0]!=' ' and tictactoe[i][0]==tictactoe[i][1] and tictactoe[i][1]==tictactoe[i][2]:
            ganador = tictactoe[i][0]
        i += 1
    i = 0
    while ganador==' ' and i<3:
        if tictactoe[0][i]!=' ' and tictactoe[0][i]==tictactoe[1][i] and tictactoe[1][i]==tictactoe[2][i]:
            ganador = tictactoe[0][i]
        i += 1
    if ganador==' ' and tictactoe[0][0]!=' ' and tictactoe[0][0]==tictactoe[1][1] and tictactoe[1][1]==tictactoe[2][2]:
        ganador = tictactoe[0][0]
    if ganador==' ' and tictactoe[0][2]!=' ' and tictactoe[0][2]==tictactoe[1][1] and tictactoe[1][1]==tictactoe[2][0]:
        ganador = tictactoe[0][2]
    juega_cpu = not juega_cpu
    turnos += 1
imprimir_cuadricula (tictactoe)
if ganador=='O':
    print ('La computadora ha ganado.')
elif ganador=='X':
    print ('El usuario ha ganado.')
elif ganador==' ':
    print ('Empate.')