ai_mark = 'O' if opponent == 'X' else 'X'
next_play = opponent if starter == '1' else ai_mark
#initialize
rules.next_play = next_play
player.set_mark(ai_mark) #computer's mark (i.e., X)
end_game = False
while not end_game:
print_board(board.grid)
mark = rules.get_current_player()
if mark == ai_mark:
position = player.next_move()
print 'Robot plays position %d' % position
board.add_mark(mark, int(position))
else:
position = raw_input("Pick a position to play between 1 and 9: ")
while position not in [str(x) for x in xrange(1,10)]:
position = raw_input("Invalid: Pick a number between 1 and 9: ")
valid = board.add_mark(mark, int(position))
while not valid:
mark = raw_input("Already taken - pick an open position: ")
valid = board.add_mark(mark, int(position))
end_game, result = rules.end_game(position)
print result
