stored json dict with access as class members

stored_json_dict.py

import json
import pprint

class Stored:
    def __init__(self, init_dict=None):
        if init_dict:
            self.__dict__ = init_dict
            
    def save(self, file_name):
        with open(file_name, 'w') as fd:
            fd.write(self.to_json())
            
    def to_json(self):
        return json.dumps(self.__dict__, sort_keys=True, indent=4)
    
    @classmethod
    def from_json(cls, json_str):
        return cls(json.loads(json_str))
    
    @classmethod
    def load(cls, file_name):
        with open(file_name, 'r') as fd:
            json_str = fd.read()
            return cls(json.loads(json_str))
    
    def __repr__(self):
        return pprint.pformat(self.__dict__)
        
class Settings(Stored):
    """ Settings object. Must be passed to main classes. """
    def __init__(self, *args, **kwargs):
        self.context_name = 'base'
        self.mail_timeout = 60
        super().__init__(*args, **kwargs)