TypeError: Object of type 'Animal' is not JSON serializable/ 自定义对象 转json串

import json


class Animal(object):
    def __init__(self):
        self.name = 'tom'

    def __repr__(self):
        return f'my name is {self.name}&i like apple'


d1 = {
    'county': 'china',
    'name': Animal()
}


class MyDefault(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, Animal):
            return str(obj)
        return json.JSONEncoder.default(self, obj)


print(json.dumps(d1, cls=MyDefault))