（蟒蛇）为类 PetData 定义成员方法 print_all（）。使用基类的 print_all（） 方法

问：

任务：为类 PetData 定义成员方法 print_all（）。使用基类的 print_all（） 方法。 带有输入的给定程序的示例输出：“Fluffy”5 4444 常用中文名：毛茸茸 年龄：5岁 编号： 4444

第一个错误是 ID： 4444 后面没有换行符。当我解决这个问题时，我开始在 ID： 之前得到 NONE 这个词。如果我知道它来自哪里，我可能会弄清楚，但我什么都没有。请帮忙!!

class AnimalData:
    def __init__(self):
        self.full_name = ''
        self.age_years = 0

    def set_name(self, given_name):
        self.full_name = given_name

    def set_age(self, num_years):
        self.age_years = num_years

    # Other parts omitted

    def print_all(self):
        print('Name:',  self.full_name)
        print('Age:', self.age_years)


class PetData(AnimalData):
    def __init__(self):
        AnimalData.__init__(self)
        self.id_num = 0

    def set_id(self, pet_id):
        self.id_num = pet_id

    # FIXME: Add print_all() member method

""" Your solution goes here"""

user_pet = PetData()
user_pet.set_name(input())
user_pet.set_age(int(input()))
user_pet.set_id(int(input()))
user_pet.print_all()```


I've been working on this assignment for 2 days and I'm getting errors no matter what I try.  At one point the word NONE was randomly appearing before ID: 4444, still can't figure out where it's coming from.  PLEASE HELP!!!! 

Here is some of what I've tried and the errors I got.

## 
No newline after ID: 4444
def print_all(self):
AnimalData.print_all(self)
print('ID:', self.pet_id)

## 
ID number not showing in output.
def print_all(self):
print(AnimalData.print_all(self), 'ID:', self.id_num)

## 
No newline after ID: 4444
user_pet = PetData()
user_pet.set_name("Fluffy")
user_pet.set_age(5)
user_pet.set_id(4444)
user_pet.print_all()