如何转储整个对象及其值？

import json

class Person:
    def __init__(self, name, age):
        self.name = name
        self.age = age

# 创建一个Person对象
person = Person("Alice", 30)

# 将对象转储为JSON字符串
person_json = json.dumps(person.__dict__)

print(person_json)

import json

class Person:
    def __init__(self, name, age, friend=None):
        self.name = name
        self.age = age
        self.friend = friend

# 创建两个Person对象，形成循环引用
alice = Person("Alice", 30)
bob = Person("Bob", 25, alice)
alice.friend = bob

# 自定义序列化函数，处理循环引用
def serialize(obj):
    if isinstance(obj, Person):
        return {
            "name": obj.name,
            "age": obj.age,
            "friend": obj.friend.name if obj.friend else None
        }
    raise TypeError(f"Object of type {obj.__class__.__name__} is not JSON serializable")

# 使用自定义序列化函数转储对象
person_json = json.dumps(alice, default=serialize)

print(person_json)