old_contents: """
  homeassistant.components.switch.tellduslive
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Support for Tellstick switches using Tellstick Net and
  the Telldus Live online service.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/switch.tellduslive/
  
  """
  import logging
  
  from homeassistant.components import tellduslive
  from homeassistant.helpers.entity import ToggleEntity
  
  _LOGGER = logging.getLogger(__name__)
  
  
  def setup_platform(hass, config, add_devices, discovery_info=None):
      """ Find and return Tellstick switches. """
      if discovery_info is None:
          return
      add_devices(TelldusLiveSwitch(switch) for switch in discovery_info)
  
  
  class TelldusLiveSwitch(ToggleEntity):
      """ Represents a Tellstick switch. """
  
      def __init__(self, switch_id):
          self._id = switch_id
          self.update()
          _LOGGER.debug("created switch %s", self)
  
      def update(self):
          tellduslive.NETWORK.update_switches()
          self._switch = tellduslive.NETWORK.get_switch(self._id)
  
      @property
      def should_poll(self):
          """ Tells Home Assistant to poll this entity. """
          return True
  
      @property
      def name(self):
          """ Returns the name of the switch if any. """
          return self._switch["name"]
  
      @property
      def available(self):
          return not self._switch.get("offline", False)
  
      @property
      def is_on(self):
          """ True if switch is on. """
          from tellive.live import const
          return self._switch["state"] == const.TELLSTICK_TURNON
  
      def turn_on(self, **kwargs):
          """ Turns the switch on. """
          tellduslive.NETWORK.turn_switch_on(self._id)
  
      def turn_off(self, **kwargs):
          """ Turns the switch off. """
          tellduslive.NETWORK.turn_switch_off(self._id)
  
new_contents: """
  homeassistant.components.switch.tellduslive
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Support for Tellstick switches using Tellstick Net and
  the Telldus Live online service.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/switch.tellduslive/
  
  """
  import logging
  
  from homeassistant.components import tellduslive
  from homeassistant.helpers.entity import ToggleEntity
  
  _LOGGER = logging.getLogger(__name__)
  
  
  def setup_platform(hass, config, add_devices, discovery_info=None):
      """ Find and return Tellstick switches. """
      if discovery_info is None:
          return
      add_devices(TelldusLiveSwitch(switch) for switch in discovery_info)
  
  
  class TelldusLiveSwitch(ToggleEntity):
      """ Represents a Tellstick switch. """
  
      def __init__(self, switch_id):
          self._id = switch_id
          self.update()
          _LOGGER.debug("created switch %s", self)
  
      def update(self):
          tellduslive.NETWORK.update_switches()
          self._switch = tellduslive.NETWORK.get_switch(self._id)
  
      @property
      def should_poll(self):
          """ Tells Home Assistant to poll this entity. """
          return True
  
      @property
      def assumed_state(self):
          """Return True if unable to access real state of entity."""
          return True
  
      @property
      def name(self):
          """ Returns the name of the switch if any. """
          return self._switch["name"]
  
      @property
      def available(self):
          return not self._switch.get("offline", False)
  
      @property
      def is_on(self):
          """ True if switch is on. """
          from tellive.live import const
          return self._switch["state"] == const.TELLSTICK_TURNON
  
      def turn_on(self, **kwargs):
          """ Turns the switch on. """
          tellduslive.NETWORK.turn_switch_on(self._id)
  
      def turn_off(self, **kwargs):
          """ Turns the switch off. """
          tellduslive.NETWORK.turn_switch_off(self._id)
  
subject: add assumed state property