How to use the pytradfri.util.save_json function in pytradfri

def test_json_save(self):
            FILENAME = path.join(self.test_dir, 'sample_psk_file.txt')
            conf = {'identity': 'pytradfri',
                    'key': '123abc'}

            written_file = save_json(FILENAME, conf)
            self.assertTrue(written_file)

def test_os_error(self):
            with patch("builtins.open", side_effect=OSError(-1)):
                with pytest.raises(PytradfriError):
                    load_json('whatever')
                with pytest.raises(PytradfriError):
                    save_json('whatever', {})

def test_save_not_serializable(self):
            FILENAME = path.join(self.test_dir, 'should_not_save')
            conf = b'bytes are not serializable'
            with pytest.raises(PytradfriError):
                save_json(FILENAME, conf)

try:
        identity = conf[args.host].get('identity')
        psk = conf[args.host].get('key')
        api_factory = APIFactory(host=args.host, psk_id=identity, psk=psk)
    except KeyError:
        identity = uuid.uuid4().hex
        api_factory = APIFactory(host=args.host, psk_id=identity)

        try:
            psk = await api_factory.generate_psk(args.key)
            print('Generated PSK: ', psk)

            conf[args.host] = {'identity': identity,
                               'key': psk}
            save_json(CONFIG_FILE, conf)
        except AttributeError:
            raise PytradfriError("Please provide the 'Security Code' on the "
                                 "back of your Tradfri gateway using the "
                                 "-K flag.")

    api = api_factory.request

    gateway = Gateway()

    devices_command = gateway.get_devices()
    devices_commands = await api(devices_command)
    devices = await api(devices_commands)

    sockets = [dev for dev in devices if dev.has_socket_control]

    # Print all sockets

try:
    identity = conf[args.host].get('identity')
    psk = conf[args.host].get('key')
    api_factory = APIFactory(host=args.host, psk_id=identity, psk=psk)
except KeyError:
    identity = uuid.uuid4().hex
    api_factory = APIFactory(host=args.host, psk_id=identity)

    try:
        psk = api_factory.generate_psk(args.key)
        print('Generated PSK: ', psk)

        conf[args.host] = {'identity': identity,
                           'key': psk}
        save_json(CONFIG_FILE, conf)
    except AttributeError:
        raise PytradfriError("Please provide the 'Security Code' on the "
                             "back of your Tradfri gateway using the "
                             "-K flag.")

api = api_factory.request

gateway = Gateway()

devices_command = gateway.get_devices()
devices_commands = api(devices_command)
devices = api(devices_commands)


def jsonify(input):
    return json.dumps(

try:
        identity = conf[args.host].get('identity')
        psk = conf[args.host].get('key')
        api_factory = APIFactory(host=args.host, psk_id=identity, psk=psk)
    except KeyError:
        identity = uuid.uuid4().hex
        api_factory = APIFactory(host=args.host, psk_id=identity)

        try:
            psk = api_factory.generate_psk(args.key)
            print('Generated PSK: ', psk)

            conf[args.host] = {'identity': identity,
                               'key': psk}
            save_json(CONFIG_FILE, conf)
        except AttributeError:
            raise PytradfriError("Please provide the 'Security Code' on the "
                                 "back of your Tradfri gateway using the "
                                 "-K flag.")

    api = api_factory.request

    gateway = Gateway()

    devices_command = gateway.get_devices()
    devices_commands = api(devices_command)
    devices = api(devices_commands)

    lights = [dev for dev in devices if dev.has_light_control]

    # Print all lights

try:
        identity = conf[args.host].get('identity')
        psk = conf[args.host].get('key')
        api_factory = APIFactory(host=args.host, psk_id=identity, psk=psk)
    except KeyError:
        identity = uuid.uuid4().hex
        api_factory = APIFactory(host=args.host, psk_id=identity)

        try:
            psk = await api_factory.generate_psk(args.key)
            print('Generated PSK: ', psk)

            conf[args.host] = {'identity': identity,
                               'key': psk}
            save_json(CONFIG_FILE, conf)
        except AttributeError:
            raise PytradfriError("Please provide the 'Security Code' on the "
                                 "back of your Tradfri gateway using the "
                                 "-K flag.")

    api = api_factory.request

    gateway = Gateway()

    devices_command = gateway.get_devices()
    devices_commands = await api(devices_command)
    devices = await api(devices_commands)

    blinds = [dev for dev in devices if dev.has_blind_control]
    repeaters = [dev for dev in devices if dev.has_signal_repeater_control]

try:
        identity = conf[args.host].get('identity')
        psk = conf[args.host].get('key')
        api_factory = APIFactory(host=args.host, psk_id=identity, psk=psk)
    except KeyError:
        identity = uuid.uuid4().hex
        api_factory = APIFactory(host=args.host, psk_id=identity)

        try:
            psk = await api_factory.generate_psk(args.key)
            print('Generated PSK: ', psk)

            conf[args.host] = {'identity': identity,
                               'key': psk}
            save_json(CONFIG_FILE, conf)
        except AttributeError:
            raise PytradfriError("Please provide the 'Security Code' on the "
                                 "back of your Tradfri gateway using the "
                                 "-K flag.")

    api = api_factory.request

    gateway = Gateway()

    devices_command = gateway.get_devices()
    devices_commands = await api(devices_command)
    devices = await api(devices_commands)

    lights = [dev for dev in devices if dev.has_light_control]

    # Print all lights

try:
        identity = conf[args.host].get('identity')
        psk = conf[args.host].get('key')
        api_factory = APIFactory(host=args.host, psk_id=identity, psk=psk)
    except KeyError:
        identity = uuid.uuid4().hex
        api_factory = APIFactory(host=args.host, psk_id=identity)

        try:
            psk = await api_factory.generate_psk(args.key)
            print('Generated PSK: ', psk)

            conf[args.host] = {'identity': identity,
                               'key': psk}
            save_json(CONFIG_FILE, conf)
        except AttributeError:
            raise PytradfriError("Please provide the 'Security Code' on the "
                                 "back of your Tradfri gateway using the "
                                 "-K flag.")

    api = api_factory.request

    gateway = Gateway()

    devices_command = gateway.get_devices()
    devices_commands = await api(devices_command)
    devices = await api(devices_commands)

    lights = [dev for dev in devices if dev.has_light_control]

    rgb = (0, 0, 102)