A game of Battleship

Battleship

def fill_board(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)

board = []
fill_board(board)
print_board(board)

ship_row = random_row(board)
ship_col = random_col(board)
guess = 0


while guess < 4:
    guess_row = int(raw_input("Guess Row:")) - 1
    guess_col = int(raw_input("Guess Col:")) - 1
    print ship_row
    print ship_col

    if guess_row == ship_row and guess_col == ship_col:
        print "Congratulations! You sank my battleship!"
        break
    else:
        if guess_row >= 5 or guess_col >= 5 or guess_row < 0 or guess_col < 0:
            print "Oops, that's not even in the ocean."
        elif guess_row and guess_col == 'X':
            print "You guessed that one already."
            guess += 1
        else:
            board[guess_row][guess_col] = 'X'
            print_board(board)
            guess += 1
        print "You missed my battleship!"
print "Game Over"