So I had success with the task at 13.6 and wanted to try it on my coding software.
Unfortunately, instead of printing the board it shows an invalid syntax error at line 8
right at the quotation mark of print " ".join(row)
Here's my code:
board =  for x in range(0,5): board.append(["O"] * 5) def print_board(board): for row in board: print " ".join(row) print print_board(board)