Class 2 JSON

import json
class City:
    def toJSON(self):
        return json.dumps(self, default=lambda o: o.__dict__, sort_keys=True, indent=4)
me = City()
me.name = "Onur"
me.id = 1

print(me.toJSON())  
{
    "id": 1,
    "name": "Onur"
}