I don't know how to do this:
Set the list element at guess_row, guess_col to "X".
As the last line in your else statement, call print_board(board) again so you can see the "X".
To specify a single element in a 2-dimensional list, you need to give two indices. The syntax is: list_name[i][j], where i is an element in the outer list and j is an element in the inner list.
Even with the hint I don't get it. This is my code:
from random import randint board =  for x in range(0, 5): board.append(["O"] * 5) def print_board(board): for row in board: print " ".join(row) print_board(board) def random_row(board): return randint(0, len(board) - 1) def random_col(board): return randint(0, len(board) - 1) ship_row = random_row(board) ship_col = random_col(board) guess_row = int(raw_input("Guess Row:")) guess_col = int(raw_input("Guess Col:")) print ship_row print ship_col # Write your code below! if guess_row == ship_row and guess_row == ship_col: print "Congratulations! You sank my battleship!" else: print "You missed my battleship!" ?????????/ print_board(board)