Веткаfilename = self.name + '.py'

filename = self.name + '.py' self.date.append({ 'username': self.name, 'password': self.password, 'rekord': self.rekord, }) try: with open(filename, 'r') as f_obj: except: <——-тута очибка filename = self.name + '.py' with open(filename, 'w') as f_obj: json.dump(self.date, f_obj)