Question

我无法弄清楚如何创建一个菜单类，它将在python 2.7.6中实例化一个游戏类我已经搜索了与此相关的其他问题，但我仍然无法弄清楚如何将参数从一个类传递到另一个类。这也是我第一次询问有关堆栈溢出的问题，所以如果我在这里错误地通过我的代码，我很抱歉。

class Lottery:
    def __init__(self, digits, betType, betAmt):
        self.digits = digits
        self.betType = betType
        self.betAmt = betAmt

    def play(self):
        print "<>" * 40
        print "Use 'mp' to play the same 'machine pick' each time"
        print "Use 'ap' to play a new 'machine pick' number each time"
        print "<>" * 40
        guess = raw_input("Choose a lottery number and see how long it takes until you win! >>")
        if guess.upper() == 'MP': #added machine pick option
            if digits == '3': #attempt support for 4 and 5 digit numbers
                choice = str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9))
            elif digits == '4':
                choice = str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9))
            elif digits == '5':
                choice = str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9))
            else:
                pass
        elif guess.upper() == 'AP': #placeholder for autopick in main loop
            pass
        else:
            choice = guess
        tries = 0
        while True:
            if guess.upper() == 'AP': #added machine pick option
                if digits == '3': #attempt support for 4 and 5 digit numbers
                    choice = str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9))
                elif digits == '4':
                    choice = str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9))
                elif digits == '5':
                    choice = str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9))
            if digits == '3': #attempt support for 4 and 5 digit numbers
                winning = str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9))
            elif digits == '4':
                winning = str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9))
            elif digits == '5':
                winning = str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9)) + str(randint(0,9))
            print winning, choice
            tries += 1
            if digits == '3':
                time.sleep(0.02)
            elif digits == '4':
                time.sleep(0.002)
            else:
                time.sleep(0.0005)
            if winning == choice:
                print "-----" * 10
                print "winner after " + str(tries) + " tries!"
                print "It took you " + str(tries/2) + " days to win!"
                print "your tickets cost $" + str(tries) + ".00"
                print "Your payout was $500"
                print "Your Net Revenue was $" + str(500 - tries) + ".00"
                print "-----" * 10
                break

和

class Menu:
    def __init__(self):
        #self.game = Lottery(digits, betType, betAmt)
        self.start()
    def start(self):
        print "Welcome to the Lottery!"
        self.digits = raw_input("Would you like to play '3' digit, '4' digit, or '5' digit? >> ")
        self.betType = raw_input("Straight, or Boxed bet type? >> ")
        self.betAmt = raw_input("$0.50, or $1.00? >> ")
        self.game = Lottery(self.digits, self.betType, self.betAmt)
        self.game.play()
        raw_input("Enter to play again")

任何帮助将不胜感激，我是Python和Stack Overflow的新手。谢谢:)）

Traceback (most recent call last):
  File "ILR2.py", line 81, in <module>
    Menu1 = Menu()
  File "ILR2.py", line 71, in __init__
    self.start()
  File "ILR2.py", line 78, in start
    self.game.play()
  File "ILR2.py", line 38, in play
    if digits == '3': #attempt support for 4 and 5 digit numbers
NameError: global name 'digits' is not defined

这是我在尝试运行程序时遇到的错误。这有帮助吗？对不起，我忘了第一次发帖

Answer 1

问题不在于您如何实例化彩票类。那部分没问题。相反，它看起来play类中的Lottery方法是错误的。

我们可以通过查看您的例外来看到这一点：

File "ILR2.py", line 38, in play
    if digits == '3': #attempt support for 4 and 5 digit numbers
NameError: global name 'digits' is not defined

根据上下文，您似乎正在尝试访问digits属性。为此，您需要使用self：

if self.digits == '3':
    pass

Answer 2

我认为在这种情况下，为菜单设置一个单独的课程可能没有意义。毕竟，您在Menu课程和Lottery课程中存储了有关游戏的相同信息。

您可以通过在Lottery课程中添加菜单作为方法来简化它。然后你不需要传递变量，因为它们是由用户的输入提供的：

class Lottery:    
    def __init__(self):
        self.showMenu()
        self.play()

    def showMenu(self):
        # this is the code from your Menu class
        print "Welcome to the Lottery!"
        self.digits = raw_input("Would you like to play '3' digit, '4' digit, or '5' digit? >> ")
        self.betType = raw_input("Straight, or Boxed bet type? >> ")
        self.betAmt = raw_input("$0.50, or $1.00? >> ")

    def play(self):
        # gameplay code as before

Answer 3

我不确定，因为我看不到play()函数的代码，但看起来你应该使用self.digits，而不是digits。只是一个猜测。

python类实例化另一个类

3 个答案: