[switch.tplink] Better error handling.

The whole `_update_devices` for loop should be covered by a try-except
block. That's because custom attribute getters may be invoked also after
expanding the results, resulting in unhandled `SmartDeviceException`.

platypush/plugins/switch/tplink/__init__.py

@@ -86,15 +86,15 @@ def _update_devices(
                 dev = info['type'](addr)
                 self._alias_to_dev[info.get('name', dev.alias)] = dev
                 self._ip_to_dev[addr] = dev
-            except SmartDeviceException as e:
-                self.logger.warning('Could not communicate with device %s: %s', addr, e)
 
-        for ip, dev in (devices or {}).items():
-            self._ip_to_dev[ip] = dev
-            self._alias_to_dev[dev.alias] = dev
+                for ip, dev in (devices or {}).items():
+                    self._ip_to_dev[ip] = dev
+                    self._alias_to_dev[dev.alias] = dev
 
-        if devices and publish_entities:
-            self.publish_entities(devices.values())
+                if devices and publish_entities:
+                    self.publish_entities(devices.values())
+            except SmartDeviceException as e:
+                self.logger.warning('Could not communicate with device %s: %s', addr, e)
 
     def transform_entities(self, entities: Collection[SmartDevice]):
         from platypush.entities.switches import Switch