old_contents: """
  homeassistant.components.binary_sensor.nest
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Support for Nest Thermostat Binary Sensors.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/binary_sensor.nest/
  """
  import logging
  import socket
  import homeassistant.components.nest as nest
  
  from homeassistant.components.sensor.nest import NestSensor
  from homeassistant.components.binary_sensor import BinarySensorDevice
  
  
  BINARY_TYPES = ['fan',
                  'hvac_ac_state',
                  'hvac_aux_heater_state',
                  'hvac_heater_state',
                  'hvac_heat_x2_state',
                  'hvac_heat_x3_state',
                  'hvac_alt_heat_state',
                  'hvac_alt_heat_x2_state',
                  'hvac_emer_heat_state',
                  'online']
  
  
  def setup_platform(hass, config, add_devices, discovery_info=None):
      """ Setup Nest binary sensors. """
  
      logger = logging.getLogger(__name__)
      try:
          for structure in nest.NEST.structures:
              for device in structure.devices:
                  for variable in config['monitored_conditions']:
                      if variable in BINARY_TYPES:
                          add_devices([NestBinarySensor(structure,
                                                        device,
                                                        variable)])
                      else:
                          logger.error('Nest sensor type: "%s" does not exist',
                                       variable)
      except socket.error:
          logger.error(
              "Connection error logging into the nest web service."
          )
  
  
  class NestBinarySensor(NestSensor, BinarySensorDevice):
      """ Represents a Nest binary sensor. """
  
      @property
      def is_on(self):
          """ True if the binary sensor is on. """
          return bool(getattr(self.device, self.variable))
  
new_contents: """
  homeassistant.components.binary_sensor.nest
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Support for Nest Thermostat Binary Sensors.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/binary_sensor.nest/
  """
  import logging
  import socket
  import homeassistant.components.nest as nest
  
  from homeassistant.components.sensor.nest import NestSensor
  from homeassistant.components.binary_sensor import BinarySensorDevice
  
  DEPENDENCIES = ['nest']
  BINARY_TYPES = ['fan',
                  'hvac_ac_state',
                  'hvac_aux_heater_state',
                  'hvac_heater_state',
                  'hvac_heat_x2_state',
                  'hvac_heat_x3_state',
                  'hvac_alt_heat_state',
                  'hvac_alt_heat_x2_state',
                  'hvac_emer_heat_state',
                  'online']
  
  
  def setup_platform(hass, config, add_devices, discovery_info=None):
      """ Setup Nest binary sensors. """
  
      logger = logging.getLogger(__name__)
      try:
          for structure in nest.NEST.structures:
              for device in structure.devices:
                  for variable in config['monitored_conditions']:
                      if variable in BINARY_TYPES:
                          add_devices([NestBinarySensor(structure,
                                                        device,
                                                        variable)])
                      else:
                          logger.error('Nest sensor type: "%s" does not exist',
                                       variable)
      except socket.error:
          logger.error(
              "Connection error logging into the nest web service."
          )
  
  
  class NestBinarySensor(NestSensor, BinarySensorDevice):
      """ Represents a Nest binary sensor. """
  
      @property
      def is_on(self):
          """ True if the binary sensor is on. """
          return bool(getattr(self.device, self.variable))
  
subject: Make sure Nest is setup before the binary sensors.