python 自定义对象list转json字符串怎么转？我试了很多方法

Question

现象就是这样

这是代码

coding=utf-8

import json
class Demo(json.JSONEncoder):
def init(self,af,age):
self.af = af
self.age = age

list =[Demo("dfdf","ff"),Demo("fdsf","fgg")]

print json.dumps(list)

运行结果及报错内容

Traceback (most recent call last):
File "D:/pycharm/pythonDemo/Demo.py", line 10, in
print json.dumps(list)
File "D:\python\lib\json_init_.py", line 244, in dumps
return _default_encoder.encode(obj)
File "D:\python\lib\json\encoder.py", line 207, in encode
chunks = self.iterencode(o, _one_shot=True)
File "D:\python\lib\json\encoder.py", line 270, in iterencode
return _iterencode(o, 0)
File "D:\python\lib\json\encoder.py", line 184, in default
raise TypeError(repr(o) + " is not JSON serializable")
TypeError: <__main__.Demo object at 0x00000000031C8F48> is not JSON serializable

我的解答思路和尝试过的方法

鄙人尝试了很多方法都不行

我想要达到的结果

[{"af":"dfsf","age":"ffg"},{"af":"dfsf","age":"ffg"}]

Answer 1

demo类无法序列化，是因为默认情况下，dumps()方法不知道如何将Demo实例变为一个JSON的{}对象。
参考：
https://blog.csdn.net/mr_hui_/article/details/82941199