Fixes and enhancements for the Tahoma platform (#11547)

* Strip off the RTS/IO ID from the entity ID

* Ignore exception thrown when the device does not provide an active state

* Send actions with a label for easier identification in the Tahoma log

* Linting

* Strip off the RTS/IO ID from the entity ID, take 2

As per suggestions, let HA do the standard initialization and assign
an appropriate entity_id, instead of overriding it with the lengthy
unique_id coming from the TaHoma devices.

homeassistant/components/cover/tahoma.py

@@ -7,7 +7,7 @@ https://home-assistant.io/components/cover.tahoma/
 import logging
 from datetime import timedelta
 
-from homeassistant.components.cover import CoverDevice, ENTITY_ID_FORMAT
+from homeassistant.components.cover import CoverDevice
 from homeassistant.components.tahoma import (
     DOMAIN as TAHOMA_DOMAIN, TahomaDevice)
 
@@ -30,11 +30,6 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 class TahomaCover(TahomaDevice, CoverDevice):
     """Representation a Tahoma Cover."""
 
-    def __init__(self, tahoma_device, controller):
-        """Initialize the Tahoma device."""
-        super().__init__(tahoma_device, controller)
-        self.entity_id = ENTITY_ID_FORMAT.format(self.unique_id)
-
     def update(self):
         """Update method."""
         self.controller.get_states([self.tahoma_device])
@@ -46,12 +41,16 @@ class TahomaCover(TahomaDevice, CoverDevice):
 
         0 is closed, 100 is fully open.
         """
-        position = 100 - self.tahoma_device.active_states['core:ClosureState']
-        if position <= 5:
-            return 0
-        if position >= 95:
-            return 100
-        return position
+        try:
+            position = 100 - \
+                self.tahoma_device.active_states['core:ClosureState']
+            if position <= 5:
+                return 0
+            if position >= 95:
+                return 100
+            return position
+        except KeyError:
+            return None
 
     def set_cover_position(self, position, **kwargs):
         """Move the cover to a specific position."""

homeassistant/components/tahoma.py

@@ -124,4 +124,4 @@ class TahomaDevice(Entity):
         from tahoma_api import Action
         action = Action(self.tahoma_device.url)
         action.add_command(cmd_name, *args)
-        self.controller.apply_actions('', [action])
+        self.controller.apply_actions('HomeAssistant', [action])