One Player Battleship | Python Fiddle

from random import randint

# Create board
board = []

# Populate board
for x in range(5):
    board.append(["O"] * 5)

# Format board
def print_board(board):
    for row in board:
        print " ".join(row)

# Display board
print "Let's play Battleship!"
print_board(board)

def random_row(board):
    return randint(1, len(board))
def random_col(board):
    return randint(1, len(board[0]))

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

# User control 
for turn in range(4):
    
    guess_row = int(raw_input("Guess Row:"))
    guess_col = int(raw_input("Guess Col:"))

if guess_row == ship_row and guess_col == ship_col:
        print "Congratulations! You sunk my battleship!"
        break
    
    else:
        
        if (guess_row < 1 or guess_row > 5) or (guess_col < 1 or guess_col > 5):
            print "Oops, that's not even in the ocean."
        
        elif(board[guess_row-1][guess_col-1] == "X"):
            print "You guessed that one already."
        
        else:
            print "You missed my battleship!"
            board[guess_row - 1][guess_col - 1] = "X"
        
        if turn == 3:
            print "Game Over."
    
    print "Turn" + str((turn + 1))
    print_board(board)

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