用Python编写数独游戏的解决方案及代码示例

一、首次运用Python语言编写数独游戏的程序代码如下：

def print_board(board):
for row in board:
print(" ".join(map(str, row)))

def is_valid_move(board, row, col, num):

Check if the number is already in the row

if num in board[row]:
return False

Check if the number is already in the column

if num in [board[i][col] for i in range(9)]:
return False

Check if the number is already in the 3x3 subgrid

start_row, start_col = 3 * (row // 3), 3 * (col // 3)
for i in range(start_row, start_row + 3):
for j in range(start_col, start_col + 3):
if board[i][j] == num:
return