def get_column(board, col_num):
    """takes 3x3 game and returns 3 elemtn list containg all values from column number top to bottom"""
    result = [board[0][col_num], board[1][col_num], board[2][col_num]]
    return result

print(get_column( 
    [['O', 'X', 'O'],
     ['X', ' ', ' '],
     ['X', ' ', ' ']], 2))