简单程序中的错误：TypeError：into object没有属性'__getitem__'

Question

我一直在尝试编写一个简单的Tic-Tac-Toe游戏大约1周＆gt;。＆lt;'

完整来源：http://pastebin.com/6dgjen9u

在main()中测试我的程序时：

我收到了错误：

File "x:\programming\python\tac.py", line 64, in display_board
    print "\n\t", board[0], "  |", board[1], " |", board[2]
TypeError: 'int' object has no attribute '__getitem__'

此处负责的职能：

def display_board(board):
    """ Display game board on screen."""
    print "\n\t", board[0], "  |", board[1], " |", board[2]
    print "\t", "------------"
    print "\t", board[3], "  |", board[4], " |", board[5]
    print "\t", "------------"
    print "\t", board[6], "  |", board[7], " |", board[8], "\n"

def cpu_move(board, computer, human):
    """ Takes computer's move + places on board."""

    # make a copy of the board
    board = board[:]
    bestmoves = (0,2,6,8,4,3,5,1,7)

    # if computer can win, play that square:
    for move in legal_moves(board):
        board[move] = computer
        if winning_board(board) == computer:
            print "[debug] cpu win:", move
            return move
        # undo the move because it was empty before
        board[move] = EMPTY

    # if player can win, block that square:
    for move in legal_moves(board):
        board[move] = human
        if winning_board(board) == human:
            print "[debug] block human:", move
            return move
        board[move] = EMPTY

        # chose first best move that is legal
    for move in bestmoves:
        if move in legal_moves(board):
            board[move] = computer
            print "[debug] next best move:", move
            return move


def change_turn(turn):
    if turn == X:
        return O
    else:
        return X

def main():
    human, computer = go_first()
    board = new_board()
    display_board(board)
    turn = X
    while winning_board(board) == None:
        if human == turn:
            board = human_move(board, human)
            turn = change_turn(turn)
            display_board(board)
        else:
            board = cpu_move(board, computer, human)
            turn = change_turn(turn)
            display_board(board)

我不知道导致错误的原因是什么，因为display_board(board)对于人类的行动很有效。它只是在计算机移动时失败。

Answer 1

cpu_move在此处返回一个整数：

return move

更改它以返回列表。

Answer 2

我没有看到human_move函数，但无论如何，你的问题是你试图索引一个整数。

当您从board返回cpu_move时，您将返回一个int。看看你要返回的内容：你正在返回move，这是一个整数，并且没有__getitem__方法（这是索引调用的方法）。

Answer 3

您的cpu_move函数可能会在此处返回int：

for move in bestmoves:
    if move in legal_moves(board):
        board[move] = computer
        print "[debug] next best move:", move
        return move

当您将此值用于display_board函数时，这可能是问题所在：

board = cpu_move(board, computer, human)
turn = change_turn(turn)
display_board(board)