关于国际象棋游戏，如何使用for循环输出以下效果

```python
def print_board(board: Board):
    for a in range(board):
        a = print(board[0], end="  8")
        a = print(board[1], end="  7")
        a = print(board[2], end="  6")
        a = print(board[3], end="  5")
        a = print(board[4], end="  4")
        a = print(board[5], end="  3")
        a = print(board[6], end="  2")
        a = print(board[7], end="  1")
    return a
    print(print_board(""))

    print(print_board("abcdefgh"))

```

Board这个是什么类型？你给函数传的是字符串str，不是Board类型的值

???你不是自己都给出答案了
你想问啥