12. Bad Aim


#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!"
    
else:
    if guess_row not in range(5) or guess_col not in range(5):
       print "Oops, that's not even in the ocean."
    else:
        print "You missed my battleship!"
        board[guess_row][guess_col]='X'
            
    
    
print_board(board)

What's wrong with it....

Traceback : (most recent call last):
File "python", line 22, in
ValueError: invalid literal for int() with base 10: ''


#2

what do you enter in the prompt? It should be a number, your code can't handle non-integers input from the user


#3

I just entered 2 .............................................


#4

Your error message says otherwise:

Look at which value that error message says you used


#5

without any spaces or other characters? Then this error shouldn't arise, can you make a screenshot after you entered the numbers in the prompt?

@ionatan is right (i missed it) it didn't seem you entered 2.


#6

Make sure that when you are typing very quickly, you don't hit the numerical and enter keys in the wrong order.

Try it again.


#7

OMG
U r right, thanks a lot!!


#8

@ionatan noticed it ...

ValueError: invalid literal for int() with base 10: ''

You entered an empty string.