Python : Battleship

import random

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 random.randint(0, len(board) - 1)
def random_col(board):
    return random.randint(0, len(board[0]) - 1)
ship_row = random_row(board)
ship_col = random_col(board)
print ship_row
print ship_col
# Everything from here on should go in your for loop!
# Be sure to indent four spaces!
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!"
        break
    else:
        if turn > 3:
            print "Game Over"
        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."
            elif(board[guess_row][guess_col] == "X"):
                print "You guessed that one already."
            else:
                print "You missed my battleship!"
                board[guess_row][guess_col] = "X"
    print "You have", (3-turn), "turns remain."
    #    print_board(board)