Simple battleship game in Python

gistfile1.py

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[0]) - 1)

ship_row = random_row(board)
ship_col = random_col(board)
print ship_row
print ship_col

for turn in range(4):

    guess_row = input("Guess Row:")
    guess_col = input("Guess Col:")

    if guess_row == ship_row and guess_col == ship_col:
        print "Congratulations! You sunk my battleship!"
        print turn
        if turn == 3:
            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."
            print turn
        elif(board[guess_row][guess_col] == "X"):
            print "You guessed that one already."
            print turn
        else:
            print "You missed my battleship!"
            print turn
        board[guess_row][guess_col] = "X"
        print_board(board)
    if turn == 3:
        print "Game Over"
    else:
        print "You have %s turns left" % (3 - turn)