背景：有两个二维数组，扫描第一个二维数组，根据扫描结果给第二个二维数组赋值。如果在第i行扫描到了非'.'的数num，那么就在第二个数组的第i行第num列赋值为true

问题：扫描完毕后输出第二个数组发现全为true

代码：

    

for i in range(9):

        for j in range(9):

            if board[i][j] == '.':

                continue

            else:

                num = int(board[i][j])

                rowUsed[i][num] = True

    print(rowUsed)

扫描board，赋值rowUsed

board = [["5","3",".",".","7",".",".",".","."],

         ["6",".",".","1","9","5",".",".","."],

         [".","9","8",".",".",".",".","6","."],

         ["8",".",".",".","6",".",".",".","3"],

         ["4",".",".","8",".","3",".",".","1"],

         ["7",".",".",".","2",".",".",".","6"],

         [".","6",".",".",".",".","2","8","."],

         [".",".",".","4","1","9",".",".","5"],

         [".",".",".",".","8",".",".","7","9"]

]

结果：