code show as below:

# -*- coding:gb2312 -*-
class Dog:
    #属性
    #方法
    def __init__(self,new_name,new_age):
        self.name = new_name
        self.age = new_age
    def show(self):
        print(self.name)
        print(self.age)

dog = Dog("卡卡",10)
dog.show()
#----------------------------分割线------------------------------------

class Cat:
    #属性
    #方法
    def __init__(self):
        self.name = self.get_name(new_name)
        self.age = self.get_age(new_age)
    def get_name(self,new_name):
        return new_name
    def get_age(self,new_age):
        return new_age
    def show(self):
        print(self.name)
        print(self.age)
#cat = Cat()
cat = Cat()
cat.get_name("哈哈")
cat.get_age(20)
cat = Cat()
dog.show

Results of the:

My question:
The program prompts that new_name cannot be found
I clearly wrote it down during class

I don’t know why the system prompts that it cannot be found?