How to use the pyvera.CATEGORY_HUMIDITY_SENSOR function in pyvera

"configured": "1",
            "commFailure": "0",
            "armedtripped": "1",
            "lasttrip": "1561049427",
            "tripped": "1",
            "armed": "0",
            "status": "0",
            "state": -1,
            "light": "0",
            "comment": "",
        },
        {
            "name": "Humidity sensor 1",
            "altid": "5",
            "id": DEVICE_HUMIDITY_SENSOR_ID,
            "category": CATEGORY_HUMIDITY_SENSOR,
            "subcategory": 0,
            "room": 0,
            "parent": 1,
            "configured": "1",
            "commFailure": "0",
            "armedtripped": "1",
            "lasttrip": "1561049427",
            "tripped": "1",
            "armed": "0",
            "status": "0",
            "state": -1,
            "humidity": "0",
            "comment": "",
        },
        {
            "name": "Power meter sensor 1",

def unit_of_measurement(self):
        """Return the unit of measurement of this entity, if any."""

        if self.vera_device.category == veraApi.CATEGORY_TEMPERATURE_SENSOR:
            return self._temperature_units
        if self.vera_device.category == veraApi.CATEGORY_LIGHT_SENSOR:
            return "lx"
        if self.vera_device.category == veraApi.CATEGORY_UV_SENSOR:
            return "level"
        if self.vera_device.category == veraApi.CATEGORY_HUMIDITY_SENSOR:
            return "%"
        if self.vera_device.category == veraApi.CATEGORY_POWER_METER:
            return "watts"

if self.vera_device.category == veraApi.CATEGORY_TEMPERATURE_SENSOR:
            self.current_value = self.vera_device.temperature

            vera_temp_units = (
                self.vera_device.vera_controller.temperature_units)

            if vera_temp_units == 'F':
                self._temperature_units = TEMP_FAHRENHEIT
            else:
                self._temperature_units = TEMP_CELSIUS

        elif self.vera_device.category == veraApi.CATEGORY_LIGHT_SENSOR:
            self.current_value = self.vera_device.light
        elif self.vera_device.category == veraApi.CATEGORY_UV_SENSOR:
            self.current_value = self.vera_device.light
        elif self.vera_device.category == veraApi.CATEGORY_HUMIDITY_SENSOR:
            self.current_value = self.vera_device.humidity
        elif self.vera_device.category == veraApi.CATEGORY_SCENE_CONTROLLER:
            value = self.vera_device.get_last_scene_id(True)
            time = self.vera_device.get_last_scene_time(True)
            if time == self.last_changed_time:
                self.current_value = None
            else:
                self.current_value = value
            self.last_changed_time = time
        elif self.vera_device.category == veraApi.CATEGORY_POWER_METER:
            power = convert(self.vera_device.power, float, 0)
            self.current_value = int(round(power, 0))
        elif self.vera_device.is_trippable:
            tripped = self.vera_device.is_tripped
            self.current_value = 'Tripped' if tripped else 'Not Tripped'
        else: