I need simple task to do with parts of sudoku code in python I added all the rows and blocks to the groups list aliasing the actual tiles in the board. All you need is to add the columns following the same logic.

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def __init__(self): """The empty board""" # Row/Column structure: Each row contains columns self.tiles: List[List[Tile]] = [] for row in range(NROWS): cols = [] for col in range(NCOLS): cols.append(Tile(row, col)) self.tiles.append(cols) # create an alias for each group for easy access. self.groups: List[List[Tile]] = [] # adding rows to groups for row in self.tiles: self.groups.append(row) # adding columns to groups # TODO: Add the column tiles as group to the groups of tiles # adding blocks to groups for block_row in range(SIZE): for block_col in range(SIZE): group = [] for row in range(SIZE): for col in range(SIZE): row_addr = (SIZE * block_row) + row col_addr = (SIZE * block_col) + col group.append(self.tiles[row_addr][col_addr]) self.groups.append(group)