我对 Python 中的类和输入有疑问

Question

我刚开始学习课程，正在尝试构建一个计算器，告诉人们他们需要给服务员多少小费作为一个小项目，而不是自己输入我希望用户自己做的信息，这样就可以满足他的需要. can someone please explain to me what i am doing wrong and how to fix it?现在我想我做对了，计算机接受了输入，但是当我尝试调用return_answer()函数时，我收到一条错误消息： 有人可以向我解释一下我是什么做错了，如何解决？ 提前致谢：）

class tip_calculator:
    def __init__(self,bill,amount_of_diners,precent):
        self.bill = bill
        self.amount_of_diners = amount_of_diners
        self.precent = precent

        def return_answer(self):
            print("The amount you need to pay is: ", precent * bill / amount_of_diners ** bill * 1000)

calc = tip_calculator(int(input("What was the bill?: ")), 
                      int(input("With how many people did you eat?: ")),
                      int(input("what '%' do you want to give the waiter?: ")))

calc.return_answer()

Answer 1

问题在于缩进：

class tip_calculator:
    def __init__(self, bill, amount_of_diners, precent):
        self.bill = bill
        self.amount_of_diners = amount_of_diners
        self.precent = precent

    def return_answer(self):
        print(
            "The amount you need to pay is: ",
            self.precent * self.bill / self.amount_of_diners ** self.bill * 1000,
        )


calc = tip_calculator(
    int(input("What was the bill?: ")),
    int(input("With how many people did you eat?: ")),
    int(input("what '%' do you want to give the waiter?: ")),
)

calc.return_answer()

您的return_answer方法在初始化程序 ( __init__ ) 中缩进错误。 此外，在您的return_answer中，当您想要访问字段bill 、 amount_of_diners和percent等类成员时，您需要使用self来完成，因为它们是您类的成员，而不是您方法的局部变量。