Tic Tac toe game using python

#!/usr/bin/python3

# Simple TicTacToe game in Python - EAO

import random

import sys

board=[i for i in range(0,9)]

player, computer = '',''

# Corners, Center and Others, respectively

moves=((1,7,3,9),(5,),(2,4,6,8))

# Winner combinations

winners=((0,1,2),(3,4,5),(6,7,8),(0,3,6),(1,4,7),(2,5,8),(0,4,8),(2,4,6))

# Table

tab=range(1,10)

def print_board():

    x=1

    for i in board:

        end = ' | '

        if x%3 == 0:

            end = ' \n'

            if i != 1: end+='---------\n';

        char=' '

        if i in ('X','O'): char=i;

        x+=1

        print(char,end=end)

        

def select_char():

    chars=('X','O')

    if random.randint(0,1) == 0:

        return chars[::-1]

    return chars

def can_move(brd, player, move):

    if move in tab and brd[move-1] == move-1:

        return True

    return False

def can_win(brd, player, move):

    places=[]

    x=0

    for i in brd:

        if i == player: places.append(x);

        x+=1

    win=True

    for tup in winners:

        win=True

        for ix in tup:

            if brd[ix] != player:

                win=False

                break

        if win == True:

            break

    return win

def make_move(brd, player, move, undo=False):

    if can_move(brd, player, move):

        brd[move-1] = player

        win=can_win(brd, player, move)

        if undo:

            brd[move-1] = move-1

        return (True, win)

    return (False, False)

# AI goes here

def computer_move():

    move=-1

    # If I can win, others don't matter.

    for i in range(1,10):

        if make_move(board, computer, i, True)[1]:

            move=i

            break

    if move == -1:

        # If player can win, block him.

        for i in range(1,10):

            if make_move(board, player, i, True)[1]:

                move=i

                break

    if move == -1:

        # Otherwise, try to take one of desired places.

        for tup in moves:

            for mv in tup:

                if move == -1 and can_move(board, computer, mv):

                    move=mv

                    break

    return make_move(board, computer, move)

def space_exist():

    return board.count('X') + board.count('O') != 9

player, computer = select_char()

print('Player is [%s] and computer is [%s]' % (player, computer))

result='%%% Deuce ! %%%'

while space_exist():

    print_board()

    print('# Make your move ! [1-9] : ', end='')

    move = int(input())

    moved, won = make_move(board, player, move)

    if not moved:

        print(' >> Invalid number ! Try again !')

        continue

    #

    if won:

        result='*** Congratulations ! You won ! ***'

        break

    elif computer_move()[1]:

        result='=== You lose ! =='

        break;

print_board()

print(result)