Bad aim whats wrong


#1

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[0]) - 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_col == ship_col:
    print "Congratulations! You sank my battleship!"
    board[int(guess_row)][int(guess_col)] = "X"
    print print_board(board)
elif guess_row > len(board)-1 or guess_col > len(board[0])-1:
    print "Oops, that's not even in the ocean."
else:
    print "You missed my battleship!"
    board[int(guess_row)][int(guess_col)] = "X"
    print print_board(board)

it keeps saying Traceback (most recent call last):
File "python", line 23, in
ValueError: invalid literal for int() with base 10: ''

what do I do????


#2

you should enter a number when you are prompted for it, otherwise it won't work


#3

thnks soz I'm a dope