我无法让我的tic-tac-toe游戏在python中正常运行

# 定义一个3x3的空棋盘
board = [[' ' for _ in range(3)] for _ in range(3)]

# 定义一个函数来打印棋盘
def print_board():
    for row in board:
        print('|'.join(row))
        print('-----')

# 定义一个函数来检查游戏是否结束
def check_game_over():
    # 检查行
    for row in board:
        if row.count(row[0]) == len(row) and row[0] != ' ':
            return True

    # 检查列
    for col in range(3):
        if board[0][col] == board[1][col] == board[2][col] != ' ':
            return True

    # 检查对角线
    if board[0][0] == board[1][1] == board[2][2] != ' ':
        return True
    if board[0][2] == board[1][1] == board[2][0] != ' ':
        return True

    # 检查是否平局
    if all(row.count(' ') == 0 for row in board):
        return True

    return False

# 定义一个函数来执行游戏
def play_game():
    player = 'X'
    while not check_game_over():
        print_board()
        row = int(input('请输入行号（0-2）：'))
        col = int(input('请输入列号（0-2）：'))
        if board[row][col] == ' ':
            board[row][col] = player
            player = 'O' if player == 'X' else 'X'
        else:
            print('该位置已经被占据，请重新选择。')

    print_board()
    print('游戏结束！')

# 执行游戏
play_game()