Q36.py

from typing import  List
class Solution:
    def isValidSudoku(self, board: List[List[str]]) -> bool:
        row = [[x for x in y if x != '.'] for y in board]
        col = [[x for x in y if x != '.'] for y in zip(*board)]
        pal = [[board[i+m][j+n] for m in range(3) for n in range(3) if board[i+m][j+n] != '.'] for i in (0, 3, 6) for \
              j in (0, 3, 6)]
        return all(len(set(x)) == len(x) for x in (*row, *col, *pal))

if __name__ == '__main__':
    input = [
        ["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"]
    ]
    print(Solution().isValidSudoku(input))