python json object is not serialable

problem: in class or object, we need define json encode data

Solution:

add  def __jsonencode__(self): 

create AdvancedJSONEncoder

example: 

-------------

import json

class User(object):

    def __init__(self, username):

        self.username = username

    def __jsonencode__(self):

        return {'username': self.username}

        

class AdvancedJSONEncoder(json.JSONEncoder):

    def default(self, obj):

        if hasattr(obj, '__jsonencode__'):

            return obj.__jsonencode__()

        #if isinstance(obj, set):

        #    return list(obj)

        return json.JSONEncoder.default(self, obj)

user = User('foo')

print(json.dumps(user,cls=AdvancedJSONEncoder))

-------------

good

https://myapollo.com.tw/zh-tw/python-make-json-serializable-class

other

https://www.kmp.tw/post/jsondumpsdatetimeerror/