प्रोग्राम की सुविधाएँ · भरे सुडोकू का सत्यापन

def sudoku_complete(board):
    if type(board) is not list or len(board) != 9:
        raise ValueError("nine rows")
    if any(type(row) is not list or len(row) != 9 or
           any(type(v) is not int or not 1 <= v <= 9 for v in row) for row in board):
        raise ValueError("nine integer digits per row")
    target = set(range(1,10))
    units = board + [list(col) for col in zip(*board)]
    units += [[board[y+dy][x+dx] for dy in range(3) for dx in range(3)]
              for y in (0,3,6) for x in (0,3,6)]
    return all(set(unit) == target for unit in units)