tic-tac-toe.py

class Board:
    def __init__(self, n=3):
        self.board = [["*" for i in range(n)] for j in range(n)]
        self.n = n

    def move(self, player):
        raw = raw_input("x,y move for player %s? " % player)
        try:
            x, y = map(int, raw.split(","))
            cell = self.board[y][x]
        except ValueError:
            print "wrong format!"
            return self.move(player)
        except IndexError:
            print "out of bounds!"
            return self.move(player)
        if not cell == "*":
            print "that cell is already taken!"
            return self.move(player)
        else:
            self.board[y][x] = player
        # win cons
        for row in self.board:
            if row.count(player) == self.n:
                return player
        for col in range(self.n):
            if [row[col] for row in self.board].count(player) == self.n:
                return player
        if (
            [self.board[i][i] for i in range(self.n)].count(player) == self.n or
            [self.board[i][self.n - i - 1] for i in range(self.n)].count(player) == self.n
           ):
            return player

    def render(self):
        print " " + "".join(map(str, range(self.n)))
        for i, row in enumerate(self.board):
            print str(i) + "".join(row)

    def play(self):
        while 1:
            self.render()
            if self.move("X"):
                print "player X wins!"
                return "X"
            self.render()
            if self.move("O"):
                print "player O wins!"
                return "O"

if __name__ == "__main__":
    board = Board()
    board.play()