Hey I got everything working accordingly and made it through all the lessons, but there's one thing I found that still doesn't work. When being prompted to enter either a column or a row, if I press enter before entering a value the game immediately crashes and presents this error:
Traceback (most recent call last):
File "python", line 28, in
ValueError: invalid literal for int() with base 10: ''
I wanted to know how to set up the code so that this doesn't happen if someone accidentally presses enter before typing in a value
from random import randint board =  for x in range(5): board.append(["O"] * 5) def print_board(board): for row in board: print " ".join(row) print "Let's play Battleship!" 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) # Everything from here on should go in your for loop! # Be sure to indent four spaces! for turn in range(4): guess_row = int(raw_input("Guess Row:")) guess_col = int(raw_input("Guess Col:")) if guess_row == ship_row and guess_col == ship_col: print "Congratulations! You sunk my battleship!" break else: if (guess_row < 0 or guess_row > 4) or (guess_col < 0 or guess_col > 4): print "Oops, that's not even in the ocean." elif(board[guess_row][guess_col] == "X"): print "You guessed that one already." else: print "You missed my battleship!" board[guess_row][guess_col] = "X" if turn == 3: print "Game Over" # Print (turn + 1) here! print "turn", turn + 1 print_board(board)