Test Run



I am currently at "Test Run" in 13. Battleships!. I am testing my game and it functions well under with everything I input except letters. When I enter a letter, it gives me an error.

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

This kind of bugs me, is there a way to fix this or should I just let it go?

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)


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:"))

# Write your code below!

if guess_row == ship_row and guess_col == ship_col:
    print 'Congratulations! You sank my battleship!'
    if guess_row not in range(5) or guess_col not in range(5):
        print "Oops, that's not even in the ocean."
    elif board[guess_row][guess_col] == 'X':
        print 'You guessed that one already.'
        print 'You missed my battleship!'   
        board[guess_row][guess_col] = 'X'
        print print_board(board)


You could convert it to an integer afterwards.


guess_row = raw_input("Row please: ")

if (isinstance(int(guess_row), int)):
    guess_row = int(guess_row)
    guess_row = 0