python - 宠物类 python

Question

此作业的说明:编写一个名为 Pet 的类，该类应具有以下属性:

• __姓名
• __animal_type
• __年龄

它将具有以下方法:

• 设置名称
• 设置动物类型
• 设定年龄
• 获取名称
• 获取动物类型
• 获取年龄

编写完此类后，编写一个程序来创建该类的对象并提示用户输入宠物的名称、类型和年龄。数据应存储为对象的属性。使用对象的访问器方法检索宠物的名称、类型和年龄并显示在屏幕上。

这是我的代码:

class Pet(object):
    def __init__(self, name, animal_type, age):
        self.__name = name
        self.__animal_type = animal_type
        self.__age = age

    def set_name(self, name):
        self.__name = name

    def set_type(self, animal_type):
        self.__animal_type = animal_type

    def set_age(self, age):
        self.__age = age

    def get_name(self):
        return self.__name

    def get_animal_type(self):
        return self.__animal_type

    def get_age(self):
        return self.__age


# The main function
def main():
    # Create an object from the Pet class
    pets = Pet(name, animal_type, age)

    # Prompt user to enter name, type, and age of pet
    name = input('What is the name of the pet: ')
    animal_type = input('What type of pet is it: ')
    age = int(input('How old is your pet: '))
    print('This will be added to the records. ')
    print('Here is the data you entered:')
    print('Pet Name: ', pets.get_name)
    print('Animal Type: ', pets.get_animal_type)
    print('Age: ', pets.get_age)

main()

当我运行该程序时，出现以下错误:UnboundLocalError:赋值前引用的局部变量“名称”

Answer 1

在 main() 函数中，Pet() 类对象需要参数。因此，您首先需要提供参数，然后将它们输入到 Pet() 类对象中。

class Pet:
    def __init__(self, name,animal_type,age):
        self.__name = name
        self.__animal_type = animal_type
        self.__age = age

    def set_name(self,name):
        self.__name = name

    def set_animal_type(self,animal_type):
        self.__animal_type = animal_type

    def set_age(self,age):
        self.__age = age

    def get_name(self):
        return self.__name

    def get_age(self):
        return self.__age

    def get_animal_tpe(self):
        return self.__animal_type


def main():
    pet_name = input('Please enter your pet\'\s name: ')
    pet_type = input('What animal is your pet?')
    pet_age = float(input('What is the age of your pet?'))

    pet_specs = Pet(pet_name,pet_type,pet_age)

    print('pet name is ', pet_specs.get_name())
    print('pet type is ', pet_specs.get_animal_tpe())
    print('pet age is ', pet_specs.get_age())

main()