写一个类Animal, 包含成员变量name_animal和age_animal, 实例化age_animal， 并用sort函数将aga_animal排序，然后打印输出name_animal和age_animal

以下是Animal类的实现：

class Animal:
    def __init__(self, name, age):
        self.name_animal = name
        self.age_animal = age

animals = [Animal("Dog", 5), Animal("Cat", 3), Animal("Rabbit", 2)]

# 使用sort函数将animals按年龄排序
animals.sort(key=lambda x: x.age_animal)

# 打印输出name_animal和age_animal
for animal in animals:
    print("Name:", animal.name_animal, "Age:", animal.age_animal)

输出结果为：

Name: Rabbit Age: 2
Name: Cat Age: 3
Name: Dog Age: 5