Fixes for PEP257 (#11810)

* Fixes for PEP257

* More updates

homeassistant/components/sensor/vultr.py

@@ -5,29 +5,26 @@ For more details about this component, please refer to the documentation at
 https://home-assistant.io/components/sensor.vultr/
 """
 import logging
+
 import voluptuous as vol
 
-import homeassistant.helpers.config_validation as cv
-from homeassistant.helpers.entity import Entity
-from homeassistant.const import (
-    CONF_MONITORED_CONDITIONS, CONF_NAME)
 from homeassistant.components.sensor import PLATFORM_SCHEMA
 from homeassistant.components.vultr import (
-    CONF_SUBSCRIPTION, ATTR_CURRENT_BANDWIDTH_USED, ATTR_PENDING_CHARGES,
+    ATTR_CURRENT_BANDWIDTH_USED, ATTR_PENDING_CHARGES, CONF_SUBSCRIPTION,
     DATA_VULTR)
-
-# Name defaults to {subscription label} {sensor name}
-DEFAULT_NAME = 'Vultr {} {}'
-DEPENDENCIES = ['vultr']
+from homeassistant.const import CONF_MONITORED_CONDITIONS, CONF_NAME
+import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity import Entity
 
 _LOGGER = logging.getLogger(__name__)
 
-# Monitored conditions: name, units, icon
+DEFAULT_NAME = 'Vultr {} {}'
+DEPENDENCIES = ['vultr']
+
 MONITORED_CONDITIONS = {
     ATTR_CURRENT_BANDWIDTH_USED: ['Current Bandwidth Used', 'GB',
                                   'mdi:chart-histogram'],
-    ATTR_PENDING_CHARGES: ['Pending Charges', 'US$',
-                           'mdi:currency-usd']
+    ATTR_PENDING_CHARGES: ['Pending Charges', 'US$', 'mdi:currency-usd'],
 }
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
@@ -48,15 +45,12 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
     if subscription not in vultr.data:
         _LOGGER.error("Subscription %s not found", subscription)
-        return False
+        return
 
     sensors = []
 
     for condition in monitored_conditions:
-        sensors.append(VultrSensor(vultr,
-                                   subscription,
-                                   condition,
-                                   name))
+        sensors.append(VultrSensor(vultr, subscription, condition, name))
 
     add_devices(sensors, True)
 
@@ -84,21 +78,21 @@ class VultrSensor(Entity):
         """Return the name of the sensor."""
         try:
             return self._name.format(self._condition_name)
-        except IndexError:  # name contains more {} than fulfilled
+        except IndexError:
             try:
-                return self._name.format(self.data['label'],
-                                         self._condition_name)
-            except (KeyError, TypeError):  # label key missing or data is None
+                return self._name.format(
+                    self.data['label'], self._condition_name)
+            except (KeyError, TypeError):
                 return self._name
 
     @property
     def icon(self):
-        """Icon used in the frontend if any."""
+        """Return the icon used in the frontend if any."""
         return self._icon
 
     @property
     def unit_of_measurement(self):
-        """The unit of measurement to present the value in."""
+        """Return the unit of measurement to present the value in."""
         return self._units
 
     @property