python写的battle ship小游戏

最近学python，这是今天写的一个小游戏。

from random import randint

class Board(object):
    board = []
    def __init__(self,row,col):
        self.board = []
        self.row = row
        self.col = col
        for i in range(row):
            self.board.append( ["O"] * col )
      
    def print_board(self):
        space = (self.col * 2 - 8)/2
        print "-" * space + " Board " + "-" * space
        print "-" * self.col * 2
        for r in self.board:
            print " ".join(r)
        print "-" * self.col * 2

class Game(object):
    loop_time = 4
    def __init__(self,row,col):
        self.row = row
        self.col =col
        self.actual_row = -1
        self.actual_col = -1
        self.guess_row = -100
        self.guess_col = -100
        self.main_loop()
    
    def random_row(self):
        return randint(1, self.row)
    
    def random_col(self):
        return randint(1, self.col)
    
    def set_ship(self):
        """the battle ship is here:"""
        self.actual_col = self.random_col()
        self.actual_row = self.random_row()
        print self.actual_row
        print self.actual_col
        self.my_board_actual.board[self.actual_row - 1][self.actual_col - 1] = "S"
    
    def get_input_from_player(self):
        print "Please select where to hit on the board:"
        self.guess_row = int(raw_input("To hit Row:")) - 1
        self.guess_col = int(raw_input("To hit Col:")) - 1
    
    def check_if_hit(self):
        if self.my_board_actual.board[self.guess_row][self.guess_col] == "S":
            print "Congratulations! You sunk my battle ship!"
            self.my_board.board[self.guess_row][self.guess_col] = "S"
            return True
        else:
            if self.guess_row < 0 or self.guess_col < 0 or self.guess_row > self.row or self.guess_col > self.col:
                print "Ooops, that's not even in the ocean."
            elif self.my_board.board[self.guess_row][self.guess_col] == "X":
                print "You guessed that one already."           
            else:
                print "You missed my battleship!"
                self.my_board.board[self.guess_row][self.guess_col] = "X"
            return False
                
    
    def main_loop(self):
       
        print "Game Start: Let's play Battleship!"
        turn = 1
        #print "Turn", turn
        my_board = Board(self.row,self.col)
        my_board_actual = Board(self.row,self.col)
        self.my_board = my_board
        self.my_board_actual = my_board_actual
        my_board.print_board()
        
        self.set_ship()
        
        result = False
        
        while turn < self.loop_time + 1:
            print "
Turn", turn
            self.get_input_from_player()
            result = self.check_if_hit()
            my_board.print_board()
            if result:
                turn = self.loop_time + 2
            else:
                turn += 1
        else:
            if not result:
                print "Game Over"
                           
            
            
     
        
        
my_game = Game(5,5)