From fd3ea95b8221ea95d67959e0787b434499923f48 Mon Sep 17 00:00:00 2001
From: Fabian Affolter <fabian@affolter-engineering.ch>
Date: Mon, 22 Feb 2016 10:11:46 +0100
Subject: [PATCH] Add docstrings, fix typos, and update docsstring for PEP257

---
 .../components/binary_sensor/__init__.py      |  2 --
 .../components/binary_sensor/apcupsd.py       |  8 +++-----
 .../components/binary_sensor/arest.py         | 18 +++++++----------
 .../components/binary_sensor/bloomsky.py      |  2 +-
 .../binary_sensor/command_sensor.py           | 20 +++++++++----------
 .../components/binary_sensor/demo.py          | 14 ++++++-------
 .../components/binary_sensor/mqtt.py          | 14 ++++++-------
 .../components/binary_sensor/mysensors.py     |  5 +++--
 .../components/binary_sensor/nest.py          |  8 +++-----
 .../components/binary_sensor/nx584.py         |  6 ++++--
 .../components/binary_sensor/rest.py          | 14 ++++++-------
 .../components/binary_sensor/rpi_gpio.py      | 15 ++++++--------
 homeassistant/components/binary_sensor/tcp.py | 13 ++++++------
 .../components/binary_sensor/zigbee.py        |  4 +---
 .../components/binary_sensor/zwave.py         | 13 +++++-------
 15 files changed, 67 insertions(+), 89 deletions(-)

diff --git a/homeassistant/components/binary_sensor/__init__.py b/homeassistant/components/binary_sensor/__init__.py
index 1be1c4423ee..c3e13047aad 100644
--- a/homeassistant/components/binary_sensor/__init__.py
+++ b/homeassistant/components/binary_sensor/__init__.py
@@ -1,6 +1,4 @@
 """
-homeassistant.components.binary_sensor
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Component to interface with binary sensors (sensors which only know two states)
 that can be monitored.
 
diff --git a/homeassistant/components/binary_sensor/apcupsd.py b/homeassistant/components/binary_sensor/apcupsd.py
index 6d3ddb2c2fa..8a08ef3a6ac 100644
--- a/homeassistant/components/binary_sensor/apcupsd.py
+++ b/homeassistant/components/binary_sensor/apcupsd.py
@@ -1,6 +1,4 @@
 """
-homeassistant.components.binary_sensor.apcupsd
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Provides a binary sensor to track online status of a UPS.
 
 For more details about this platform, please refer to the documentation at
@@ -14,12 +12,12 @@ DEFAULT_NAME = "UPS Online Status"
 
 
 def setup_platform(hass, config, add_entities, discovery_info=None):
-    """ Instantiate an OnlineStatus binary sensor entity and add it to HA. """
+    """Instantiate an OnlineStatus binary sensor entity."""
     add_entities((OnlineStatus(config, apcupsd.DATA),))
 
 
 class OnlineStatus(BinarySensorDevice):
-    """ Binary sensor to represent UPS online status. """
+    """Binary sensor to represent UPS online status."""
     def __init__(self, config, data):
         self._config = config
         self._data = data
@@ -33,7 +31,7 @@ class OnlineStatus(BinarySensorDevice):
 
     @property
     def is_on(self):
-        """ True if the UPS is online, else False. """
+        """True if the UPS is online, else False."""
         return self._state == apcupsd.VALUE_ONLINE
 
     def update(self):
diff --git a/homeassistant/components/binary_sensor/arest.py b/homeassistant/components/binary_sensor/arest.py
index 3a7eac35bb5..b56d906b2e6 100644
--- a/homeassistant/components/binary_sensor/arest.py
+++ b/homeassistant/components/binary_sensor/arest.py
@@ -1,6 +1,4 @@
 """
-homeassistant.components.binary_sensor.arest
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 The arest sensor will consume an exposed aREST API of a device.
 
 For more details about this platform, please refer to the documentation at
@@ -24,8 +22,7 @@ CONF_PIN = 'pin'
 
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """ Get the aREST binary sensor. """
-
+    """Get the aREST binary sensor."""
     resource = config.get(CONF_RESOURCE)
     pin = config.get(CONF_PIN)
 
@@ -56,7 +53,7 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
 # pylint: disable=too-many-instance-attributes, too-many-arguments
 class ArestBinarySensor(BinarySensorDevice):
-    """ Implements an aREST binary sensor for a pin. """
+    """Implements an aREST binary sensor for a pin."""
 
     def __init__(self, arest, resource, name, pin):
         self.arest = arest
@@ -73,23 +70,22 @@ class ArestBinarySensor(BinarySensorDevice):
 
     @property
     def name(self):
-        """ The name of the binary sensor. """
+        """The name of the binary sensor."""
         return self._name
 
     @property
     def is_on(self):
-        """ True if the binary sensor is on. """
+        """True if the binary sensor is on."""
         return bool(self.arest.data.get('state'))
 
     def update(self):
-        """ Gets the latest data from aREST API. """
+        """Gets the latest data from aREST API."""
         self.arest.update()
 
 
 # pylint: disable=too-few-public-methods
 class ArestData(object):
-    """ Class for handling the data retrieval for pins. """
-
+    """Class for handling the data retrieval for pins."""
     def __init__(self, resource, pin):
         self._resource = resource
         self._pin = pin
@@ -97,7 +93,7 @@ class ArestData(object):
 
     @Throttle(MIN_TIME_BETWEEN_UPDATES)
     def update(self):
-        """ Gets the latest data from aREST device. """
+        """Gets the latest data from aREST device."""
         try:
             response = requests.get('{}/digital/{}'.format(
                 self._resource, self._pin), timeout=10)
diff --git a/homeassistant/components/binary_sensor/bloomsky.py b/homeassistant/components/binary_sensor/bloomsky.py
index ce24a0c1015..32ccad6df91 100644
--- a/homeassistant/components/binary_sensor/bloomsky.py
+++ b/homeassistant/components/binary_sensor/bloomsky.py
@@ -38,7 +38,7 @@ class BloomSkySensor(BinarySensorDevice):
     """ Represents a single binary sensor in a BloomSky device. """
 
     def __init__(self, bs, device, sensor_name):
-        """Initialize a bloomsky binary sensor."""
+        """Initialize a BloomSky binary sensor."""
         self._bloomsky = bs
         self._device_id = device["DeviceID"]
         self._sensor_name = sensor_name
diff --git a/homeassistant/components/binary_sensor/command_sensor.py b/homeassistant/components/binary_sensor/command_sensor.py
index 45b950cec8f..677a4f2b95c 100644
--- a/homeassistant/components/binary_sensor/command_sensor.py
+++ b/homeassistant/components/binary_sensor/command_sensor.py
@@ -1,8 +1,6 @@
 """
-homeassistant.components.binary_sensor.command_sensor
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-Allows to configure custom shell commands to turn a value
-into a logical value for a binary sensor.
+Allows to configure custom shell commands to turn a value into a logical value
+for a binary sensor.
 
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/binary_sensor.command/
@@ -27,8 +25,7 @@ MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=60)
 
 # pylint: disable=unused-argument
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """ Add the Command Sensor. """
-
+    """Add the Command Sensor."""
     if config.get('command') is None:
         _LOGGER.error('Missing required variable: "command"')
         return False
@@ -47,8 +44,9 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
 # pylint: disable=too-many-arguments
 class CommandBinarySensor(BinarySensorDevice):
-    """ Represents a binary sensor that is returning
-    a value of a shell commands. """
+    """
+    Represents a binary sensor that is returning a value of a shell commands.
+    """
     def __init__(self, hass, data, name, payload_on,
                  payload_off, value_template):
         self._hass = hass
@@ -62,16 +60,16 @@ class CommandBinarySensor(BinarySensorDevice):
 
     @property
     def name(self):
-        """ The name of the sensor. """
+        """The name of the sensor."""
         return self._name
 
     @property
     def is_on(self):
-        """ True if the binary sensor is on. """
+        """True if the binary sensor is on."""
         return self._state
 
     def update(self):
-        """ Gets the latest data and updates the state. """
+        """Gets the latest data and updates the state."""
         self.data.update()
         value = self.data.value
 
diff --git a/homeassistant/components/binary_sensor/demo.py b/homeassistant/components/binary_sensor/demo.py
index 90c7accf512..3759ccb7662 100644
--- a/homeassistant/components/binary_sensor/demo.py
+++ b/homeassistant/components/binary_sensor/demo.py
@@ -1,13 +1,11 @@
 """
-homeassistant.components.binary_sensor.demo
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Demo platform that has two fake binary sensors.
 """
 from homeassistant.components.binary_sensor import BinarySensorDevice
 
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """ Sets up the Demo binary sensors. """
+    """Sets up the Demo binary sensors """
     add_devices([
         DemoBinarySensor('Basement Floor Wet', False, 'moisture'),
         DemoBinarySensor('Movement Backyard', True, 'motion'),
@@ -15,7 +13,7 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
 
 class DemoBinarySensor(BinarySensorDevice):
-    """ A Demo binary sensor. """
+    """A Demo binary sensor."""
 
     def __init__(self, name, state, sensor_class):
         self._name = name
@@ -24,20 +22,20 @@ class DemoBinarySensor(BinarySensorDevice):
 
     @property
     def sensor_class(self):
-        """ Return our class. """
+        """Return the class of this sensor."""
         return self._sensor_type
 
     @property
     def should_poll(self):
-        """ No polling needed for a demo binary sensor. """
+        """No polling needed for a demo binary sensor."""
         return False
 
     @property
     def name(self):
-        """ Returns the name of the binary sensor. """
+        """Returns the name of the binary sensor."""
         return self._name
 
     @property
     def is_on(self):
-        """ True if the binary sensor is on. """
+        """True if the binary sensor is on."""
         return self._state
diff --git a/homeassistant/components/binary_sensor/mqtt.py b/homeassistant/components/binary_sensor/mqtt.py
index e8f09e80ae2..139720bb117 100644
--- a/homeassistant/components/binary_sensor/mqtt.py
+++ b/homeassistant/components/binary_sensor/mqtt.py
@@ -1,6 +1,4 @@
 """
-homeassistant.components.binary_sensor.mqtt
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Allows to configure a MQTT binary sensor.
 
 For more details about this platform, please refer to the documentation at
@@ -25,7 +23,7 @@ DEPENDENCIES = ['mqtt']
 
 # pylint: disable=unused-argument
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """ Add MQTT binary sensor. """
+    """Add MQTT binary sensor."""
 
     if config.get('state_topic') is None:
         _LOGGER.error('Missing required variable: state_topic')
@@ -43,7 +41,7 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
 # pylint: disable=too-many-arguments, too-many-instance-attributes
 class MqttBinarySensor(BinarySensorDevice):
-    """ Represents a binary sensor that is updated by MQTT. """
+    """Represents a binary sensor that is updated by MQTT."""
     def __init__(self, hass, name, state_topic, qos, payload_on, payload_off,
                  value_template):
         self._hass = hass
@@ -55,7 +53,7 @@ class MqttBinarySensor(BinarySensorDevice):
         self._qos = qos
 
         def message_received(topic, payload, qos):
-            """ A new MQTT message has been received. """
+            """A new MQTT message has been received."""
             if value_template is not None:
                 payload = template.render_with_possible_json_value(
                     hass, value_template, payload)
@@ -70,15 +68,15 @@ class MqttBinarySensor(BinarySensorDevice):
 
     @property
     def should_poll(self):
-        """ No polling needed. """
+        """No polling needed."""
         return False
 
     @property
     def name(self):
-        """ The name of the binary sensor. """
+        """The name of the binary sensor."""
         return self._name
 
     @property
     def is_on(self):
-        """ True if the binary sensor is on. """
+        """True if the binary sensor is on."""
         return self._state
diff --git a/homeassistant/components/binary_sensor/mysensors.py b/homeassistant/components/binary_sensor/mysensors.py
index ffa6742697a..77b4432e000 100644
--- a/homeassistant/components/binary_sensor/mysensors.py
+++ b/homeassistant/components/binary_sensor/mysensors.py
@@ -54,7 +54,8 @@ class MySensorsBinarySensor(BinarySensorDevice):
 
     def __init__(
             self, gateway, node_id, child_id, name, value_type, child_type):
-        """Setup class attributes on instantiation.
+        """
+        Setup class attributes on instantiation.
 
         Args:
         gateway (GatewayWrapper): Gateway object.
@@ -124,7 +125,7 @@ class MySensorsBinarySensor(BinarySensorDevice):
 
     @property
     def sensor_class(self):
-        """Return the class of this sensor, from SENSOR_CASSES."""
+        """Return the class of this sensor, from SENSOR_CLASSES."""
         pres = self.gateway.const.Presentation
         class_map = {
             pres.S_DOOR: 'opening',
diff --git a/homeassistant/components/binary_sensor/nest.py b/homeassistant/components/binary_sensor/nest.py
index a3c2b252b15..f686a368100 100644
--- a/homeassistant/components/binary_sensor/nest.py
+++ b/homeassistant/components/binary_sensor/nest.py
@@ -1,6 +1,4 @@
 """
-homeassistant.components.binary_sensor.nest
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Support for Nest Thermostat Binary Sensors.
 
 For more details about this platform, please refer to the documentation at
@@ -27,7 +25,7 @@ BINARY_TYPES = ['fan',
 
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """ Setup Nest binary sensors. """
+    """Setup Nest binary sensors."""
 
     logger = logging.getLogger(__name__)
     try:
@@ -48,9 +46,9 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
 
 class NestBinarySensor(NestSensor, BinarySensorDevice):
-    """ Represents a Nest binary sensor. """
+    """Represents a Nest binary sensor."""
 
     @property
     def is_on(self):
-        """ True if the binary sensor is on. """
+        """True if the binary sensor is on."""
         return bool(getattr(self.device, self.variable))
diff --git a/homeassistant/components/binary_sensor/nx584.py b/homeassistant/components/binary_sensor/nx584.py
index f77de7693ce..b5e36395a7a 100644
--- a/homeassistant/components/binary_sensor/nx584.py
+++ b/homeassistant/components/binary_sensor/nx584.py
@@ -1,6 +1,4 @@
 """
-homeassistant.components.sensor.nx584
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Support for exposing nx584 elements as sensors.
 
 For more details about this platform, please refer to the documentation at
@@ -73,18 +71,22 @@ class NX584ZoneSensor(BinarySensorDevice):
 
     @property
     def sensor_class(self):
+        """Return the class of this sensor, from SENSOR_CLASSES."""
         return self._zone_type
 
     @property
     def should_poll(self):
+        """No polling needed."""
         return False
 
     @property
     def name(self):
+        """Name of the binary sensor."""
         return self._zone['name']
 
     @property
     def is_on(self):
+        """Return true if the binary sensor is on."""
         # True means "faulted" or "open" or "abnormal state"
         return self._zone['state']
 
diff --git a/homeassistant/components/binary_sensor/rest.py b/homeassistant/components/binary_sensor/rest.py
index a7f0ad72604..63c7f7a3e19 100644
--- a/homeassistant/components/binary_sensor/rest.py
+++ b/homeassistant/components/binary_sensor/rest.py
@@ -1,6 +1,4 @@
 """
-homeassistant.components.binary_sensor.rest
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 The rest binary sensor will consume responses sent by an exposed REST API.
 
 For more details about this platform, please refer to the documentation at
@@ -21,7 +19,7 @@ DEFAULT_METHOD = 'GET'
 
 # pylint: disable=unused-variable
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """ Setup REST binary sensors. """
+    """Setup REST binary sensors."""
     resource = config.get('resource', None)
     method = config.get('method', DEFAULT_METHOD)
     payload = config.get('payload', None)
@@ -41,10 +39,10 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
 # pylint: disable=too-many-arguments
 class RestBinarySensor(BinarySensorDevice):
-    """ A REST binary sensor. """
+    """A REST binary sensor."""
 
     def __init__(self, hass, rest, name, value_template):
-        """ Initialize a REST binary sensor. """
+        """Initialize a REST binary sensor."""
         self._hass = hass
         self.rest = rest
         self._name = name
@@ -54,12 +52,12 @@ class RestBinarySensor(BinarySensorDevice):
 
     @property
     def name(self):
-        """ Name of the binary sensor. """
+        """Name of the binary sensor."""
         return self._name
 
     @property
     def is_on(self):
-        """ Return if the binary sensor is on. """
+        """Return true if the binary sensor is on."""
         if self.rest.data is None:
             return False
 
@@ -69,5 +67,5 @@ class RestBinarySensor(BinarySensorDevice):
         return bool(int(self.rest.data))
 
     def update(self):
-        """ Get the latest data from REST API and updates the state. """
+        """Get the latest data from REST API and updates the state."""
         self.rest.update()
diff --git a/homeassistant/components/binary_sensor/rpi_gpio.py b/homeassistant/components/binary_sensor/rpi_gpio.py
index a43d009e25f..22df2795076 100644
--- a/homeassistant/components/binary_sensor/rpi_gpio.py
+++ b/homeassistant/components/binary_sensor/rpi_gpio.py
@@ -1,12 +1,9 @@
 """
-homeassistant.components.binary_sensor.rpi_gpio
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Allows to configure a binary sensor using RPi GPIO.
 
 For more details about this platform, please refer to the documentation at
 https://home-assistant.io/components/binary_sensor.rpi_gpio/
 """
-
 import logging
 
 import homeassistant.components.rpi_gpio as rpi_gpio
@@ -23,7 +20,7 @@ _LOGGER = logging.getLogger(__name__)
 
 # pylint: disable=unused-argument
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """ Sets up the Raspberry PI GPIO devices. """
+    """Sets up the Raspberry PI GPIO devices."""
 
     pull_mode = config.get('pull_mode', DEFAULT_PULL_MODE)
     bouncetime = config.get('bouncetime', DEFAULT_BOUNCETIME)
@@ -39,7 +36,7 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
 # pylint: disable=too-many-arguments, too-many-instance-attributes
 class RPiGPIOBinarySensor(BinarySensorDevice):
-    """ Represents a binary sensor that uses Raspberry Pi GPIO. """
+    """Represents a binary sensor that uses Raspberry Pi GPIO."""
     def __init__(self, name, port, pull_mode, bouncetime, invert_logic):
         # pylint: disable=no-member
 
@@ -53,22 +50,22 @@ class RPiGPIOBinarySensor(BinarySensorDevice):
         self._state = rpi_gpio.read_input(self._port)
 
         def read_gpio(port):
-            """ Reads state from GPIO. """
+            """Reads state from GPIO."""
             self._state = rpi_gpio.read_input(self._port)
             self.update_ha_state()
         rpi_gpio.edge_detect(self._port, read_gpio, self._bouncetime)
 
     @property
     def should_poll(self):
-        """ No polling needed. """
+        """No polling needed."""
         return False
 
     @property
     def name(self):
-        """ The name of the sensor. """
+        """The name of the sensor."""
         return self._name
 
     @property
     def is_on(self):
-        """ Returns the state of the entity. """
+        """Returns the state of the entity."""
         return self._state != self._invert_logic
diff --git a/homeassistant/components/binary_sensor/tcp.py b/homeassistant/components/binary_sensor/tcp.py
index 1f8bf2387c9..33d26f76333 100644
--- a/homeassistant/components/binary_sensor/tcp.py
+++ b/homeassistant/components/binary_sensor/tcp.py
@@ -1,30 +1,31 @@
 """
-homeassistant.components.binary_sensor.tcp
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Provides a binary_sensor which gets its values from a TCP socket.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/binary_sensor.tcp/
 """
 import logging
 
 from homeassistant.components.binary_sensor import BinarySensorDevice
 from homeassistant.components.sensor.tcp import Sensor, DOMAIN, CONF_VALUE_ON
 
-
 DEPENDENCIES = [DOMAIN]
-
 _LOGGER = logging.getLogger(__name__)
 
 
 def setup_platform(hass, config, add_entities, discovery_info=None):
-    """ Create the BinarySensor. """
+    """Create the binary sensor."""
     if not BinarySensor.validate_config(config):
         return False
+
     add_entities((BinarySensor(hass, config),))
 
 
 class BinarySensor(BinarySensorDevice, Sensor):
-    """ A binary sensor which is on when its state == CONF_VALUE_ON. """
+    """A binary sensor which is on when its state == CONF_VALUE_ON."""
     required = (CONF_VALUE_ON,)
 
     @property
     def is_on(self):
+        """True if the binary sensor is on."""
         return self._state == self._config[CONF_VALUE_ON]
diff --git a/homeassistant/components/binary_sensor/zigbee.py b/homeassistant/components/binary_sensor/zigbee.py
index 6954ed33a82..49b6f12ed5c 100644
--- a/homeassistant/components/binary_sensor/zigbee.py
+++ b/homeassistant/components/binary_sensor/zigbee.py
@@ -1,6 +1,4 @@
 """
-homeassistant.components.binary_sensor.zigbee
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Contains functionality to use a ZigBee device as a binary sensor.
 
 For more details about this platform, please refer to the documentation at
@@ -14,7 +12,7 @@ DEPENDENCIES = ["zigbee"]
 
 
 def setup_platform(hass, config, add_entities, discovery_info=None):
-    """ Create and add an entity based on the configuration. """
+    """Create and add an entity based on the configuration."""
     add_entities([
         ZigBeeBinarySensor(hass, ZigBeeDigitalInConfig(config))
     ])
diff --git a/homeassistant/components/binary_sensor/zwave.py b/homeassistant/components/binary_sensor/zwave.py
index eb9f446febe..8b21500cc85 100644
--- a/homeassistant/components/binary_sensor/zwave.py
+++ b/homeassistant/components/binary_sensor/zwave.py
@@ -1,13 +1,9 @@
 """
-homeassistant.components.binary_sensor.zwave
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Interfaces with Z-Wave sensors.
 
 For more details about this platform, please refer to the documentation
-at https://home-assistant.io/components/zwave/
+https://home-assistant.io/components/binary_sensor.zwave/
 """
-
-
 import logging
 
 from homeassistant.components.zwave import (
@@ -23,7 +19,7 @@ DEPENDENCIES = []
 
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """Setup the mysensors platform for sensors."""
+    """Setup the Z-Wave platform for sensors."""
 
     if discovery_info is None or NETWORK is None:
         return
@@ -37,7 +33,7 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
 
 class ZWaveBinarySensor(BinarySensorDevice, ZWaveDeviceEntity):
-    """ Represents a binary sensor within Z-Wave. """
+    """Represents a binary sensor within Z-Wave."""
 
     def __init__(self, value, sensor_class):
         self._sensor_type = sensor_class
@@ -62,9 +58,10 @@ class ZWaveBinarySensor(BinarySensorDevice, ZWaveDeviceEntity):
 
     @property
     def should_poll(self):
+        """No polling needed."""
         return False
 
     def value_changed(self, value):
-        """ Called when a value has changed on the network. """
+        """Called when a value has changed on the network."""
         if self._value.value_id == value.value_id:
             self.update_ha_state()