Python如何将9x9数独嵌套列表按指定网格格式打印输出

直接替换你现有的formatted_board函数为以下实现即可匹配要求的打印格式：

def formatted_board():
    # 打印顶部列号
    print("    0 1 2   3 4 5   6 7 8 ")
    # 通用横向分割线
    separator = "  +-------+-------+-------+"
    print(separator)
    # 逐行输出棋盘内容
    for row_idx in range(9):
        line = f"{row_idx} |"
        for col_idx in range(9):
            line += f" {board[row_idx][col_idx]}"
            # 每3列添加竖线分隔
            if (col_idx + 1) % 3 == 0:
                line += " |"
        print(line)
        # 每3行添加横向分割线
        if (row_idx + 1) % 3 == 0:
            print(separator)

如果需要避免输入的行、列超出0-8范围导致数组索引报错，也可以同步优化choose_cell函数的校验逻辑：

def choose_cell():
    try:
        row = int(input("choose row(0-8):"))
        column = int(input("choose column(0-8):"))
        choose_num = int(input("choose a num between 1 and 9:"))
        if 0 <= row <= 8 and 0 <= column <=8 and 0 < choose_num <=9:
            board[row][column] = choose_num
            formatted_board()
        else:
            print("illegal input try again")
            choose_cell()
    except ValueError:
        print("please enter valid integer")
        choose_cell()

内容的提问来源于stack exchange，提问作者Shushue