Fix PEPE257 issues

homeassistant/components/sensor/zwave.py

@@ -30,8 +30,7 @@ DEVICE_MAPPINGS = {
 
 
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """Sets up Z-Wave sensors."""
-
+    """Setup Z-Wave sensors."""
     # Return on empty `discovery_info`. Given you configure HA with:
     #
     # sensor:
@@ -75,9 +74,10 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
 
 class ZWaveSensor(ZWaveDeviceEntity, Entity):
-    """Represents a Z-Wave sensor."""
+    """Representation of a Z-Wave sensor."""
 
     def __init__(self, sensor_value):
+        """Initialize the sensor."""
         from openzwave.network import ZWaveNetwork
         from pydispatch import dispatcher
 
@@ -88,12 +88,12 @@ class ZWaveSensor(ZWaveDeviceEntity, Entity):
 
     @property
     def state(self):
-        """Returns the state of the sensor."""
+        """Return the state of the sensor."""
         return self._value.data
 
     @property
     def unit_of_measurement(self):
-        """Unit the value is expressed in."""
+        """Return the unit of measurement the value is expressed in."""
         return self._value.units
 
     def value_changed(self, value):
@@ -103,10 +103,11 @@ class ZWaveSensor(ZWaveDeviceEntity, Entity):
 
 
 class ZWaveMultilevelSensor(ZWaveSensor):
-    """Represents a multi level sensor Z-Wave sensor."""
+    """Representation of a multi level sensor Z-Wave sensor."""
+
     @property
     def state(self):
-        """Returns the state of the sensor."""
+        """Return the state of the sensor."""
         value = self._value.data
 
         if self._value.units in ('C', 'F'):
@@ -118,7 +119,7 @@ class ZWaveMultilevelSensor(ZWaveSensor):
 
     @property
     def unit_of_measurement(self):
-        """Unit the value is expressed in."""
+        """Return the unit the value is expressed in."""
         unit = self._value.units
 
         if unit == 'C':
@@ -130,8 +131,7 @@ class ZWaveMultilevelSensor(ZWaveSensor):
 
 
 class ZWaveAlarmSensor(ZWaveSensor):
-    """
-    A Z-wave sensor that sends Alarm alerts
+    """Representation of a Z-Wave sensor that sends Alarm alerts.
 
     Examples include certain Multisensors that have motion and vibration
     capabilities. Z-Wave defines various alarm types such as Smoke, Flood,
@@ -141,4 +141,5 @@ class ZWaveAlarmSensor(ZWaveSensor):
 
     COMMAND_CLASS_ALARM is what we get here.
     """
+
     pass