This gist is for updating the json file

json_update

 with open(self.outputfile, 'r+', encoding="utf-8") as json_file:
                load_json_file = json.load(json_file)
                load_json_file['link_list'].append(updated_data)

                json_file.seek(0)
                json_file.write(json.dumps(
                    load_json_file, indent=2, ensure_ascii=False))
                json_file.truncate()