Question

嘿，当我输入饮料并输入我得到的糖量时，我有两个错误＆＃34; builtins.Type错误：＆＃39; str＆＃39;对象不可调用＆＃34;当我输入AlcoholicDrink和糖和酒量时，我得到了＃34; builtins.Type错误：无法转换＆＃39;浮动＆＃39;反对str含义＆＃34;。我仍然学习编码，所以我对错误不满意任何帮助都表示赞赏！

class Drink:
    def __init__(self, sugar):
        self.sugar = sugar

    def numberOfCalories(self):
        return 3.87 * sugar

class AlcoholicDrink(Drink):
    def __init__(self, alcohol, sugar):
        super().__init__(sugar)       
        self.alcohol  = alcohol

    def numberOfCalories(self):
        if self.alcohol > 0:
            return self.alcohol * 7.0 + self.sugar
        else:
            super().numberOfCalories()

choice = input('What would you like to drink?(Drink or AlcoholicDrink)  ')

if (choice == 'AlcoholicDrink'):

    sugar = float(input('How much sugar is in your drink? '))
    alcohol = float(input('How much alcohol is in your drink? '))
    userDrink = AlcoholicDrink(sugar, alcohol)

elif (choice == 'Drink'):

    sugar = float(input('how much sugar is in your drink? '))
    userDrink = Drink(sugar)

print ('Your amount of calories are ' + (userDrink.numberOfCalories()))

Answer 1

对于'str' object is not callable错误：您有class Drink，然后指定Drink = input(...)。后者正在覆盖前者。 Python没有针对函数，类和字符串的单独存储桶。使用唯一的变量名来避免此问题。

对于Can't convert 'float' object to str implicitly错误：上一次print()调用尝试连接（+）str，'Your amount of calories are '，{{1} }，float。你有几个选择：

将userDrink.numberOfCalories()转换为float：

str

将多个参数传递给print('Your amount of calories are ' + str(userDrink.numberOfCalories()))来电：

print()

使用字符串格式：

print('Your amount of calories are',  userDrink.numberOfCalories())

使用旧的字符串格式（不推荐使用，因为它已被弃用，而不支持上面的新字符串格式）：

print('Your amount of calories are {}'.format(userDrink.numberOfCalories()))

Answer 2

您使用同名的本地变量隐藏了Drink类。那条线

Drink = input('What would you like to drink?(Drink or AlcoholicDrink)  ')

到

choice = input('What would you like to drink?(Drink or AlcoholicDrink)  ')

并相应地更改所有其他引用：

if (choice == 'AlcoholicDrink'):

    sugar = float(input('How much sugar is in your drink? '))
    alcohol = float(input('How much alcohol is in your drink? '))
    userDrink = AlcoholicDrink(sugar, alcohol)

elif (choice == 'Drink'):

    sugar = float(input('how much sugar is in your drink? '))
    userDrink = Drink(sugar)

print ('Your amount of calories are ' + (userDrink.numberOfCalories()))

Answer 3

请注意，您的“Drink”变量实际上是引用您之前创建的Drink类。传统上，变量以小写字母开头，类以大写字母开头。采用这些约定可以帮助您避免将来出现类似问题。

将其更改为其他名称有助于解决您的问题！

阅读本文以了解更多python约定：

Proper Python Conventions

不知道如何修复builtin.TypeError＆＃39; s

3 个答案: