old_contents: """
  homeassistant.components.sensor.cpuspeed
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Shows the current CPU speed.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/sensor.cpuspeed.html
  """
  import logging
  
  from homeassistant.helpers.entity import Entity
  
  REQUIREMENTS = ['py-cpuinfo==0.1.6']
  
  _LOGGER = logging.getLogger(__name__)
  
  DEFAULT_NAME = "CPU speed"
  
  ATTR_VENDOR = 'Vendor ID'
  ATTR_BRAND = 'Brand'
  ATTR_HZ = 'GHz Advertised'
  
  
  # pylint: disable=unused-variable
  def setup_platform(hass, config, add_devices, discovery_info=None):
      """ Sets up the CPU speed sensor. """
  
      try:
          import cpuinfo  # noqa
      except ImportError:
          _LOGGER.exception(
              "Unable to import cpuinfo. "
              "Did you maybe not install the 'py-cpuinfo' package?")
          return False
  
      add_devices([CpuSpeedSensor(config.get('name', DEFAULT_NAME))])
  
  
  class CpuSpeedSensor(Entity):
      """ A CPU info sensor. """
  
      def __init__(self, name):
          self._name = name
          self._state = None
          self._unit_of_measurement = 'GHz'
          self.update()
  
      @property
      def name(self):
          return self._name
  
      @property
      def state(self):
          """ Returns the state of the device. """
          return self._state
  
      @property
      def unit_of_measurement(self):
          return self._unit_of_measurement
  
      @property
      def state_attributes(self):
          """ Returns the state attributes. """
          if self.info is not None:
              return {
                  ATTR_VENDOR: self.info['vendor_id'],
                  ATTR_BRAND: self.info['brand'],
                  ATTR_HZ: round(self.info['hz_advertised_raw'][0]/10**9, 2)
              }
  
      def update(self):
          """ Gets the latest data and updates the state. """
          from cpuinfo import cpuinfo
  
          self.info = cpuinfo.get_cpu_info()
          self._state = round(float(self.info['hz_actual_raw'][0])/10**9, 2)
  
new_contents: """
  homeassistant.components.sensor.cpuspeed
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Shows the current CPU speed.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/sensor.cpuspeed.html
  """
  import logging
  
  from homeassistant.helpers.entity import Entity
  
  REQUIREMENTS = ['py-cpuinfo==0.1.6']
  
  _LOGGER = logging.getLogger(__name__)
  
  DEFAULT_NAME = "CPU speed"
  
  ATTR_VENDOR = 'Vendor ID'
  ATTR_BRAND = 'Brand'
  ATTR_HZ = 'GHz Advertised'
  
  
  # pylint: disable=unused-variable
  def setup_platform(hass, config, add_devices, discovery_info=None):
      """ Sets up the CPU speed sensor. """
  
      try:
          import cpuinfo  # noqa
      except ImportError:
          _LOGGER.exception(
              "Unable to import cpuinfo. "
              "Did you maybe not install the 'py-cpuinfo' package?")
          return False
  
      add_devices([CpuSpeedSensor(config.get('name', DEFAULT_NAME))])
  
  
  class CpuSpeedSensor(Entity):
      """ A CPU info sensor. """
  
      def __init__(self, name):
          self._name = name
          self._state = None
          self._unit_of_measurement = 'GHz'
          self.update()
  
      @property
      def name(self):
          """ The name of the sensor. """
          return self._name
  
      @property
      def state(self):
          """ Returns the state of the device. """
          return self._state
  
      @property
      def unit_of_measurement(self):
          """ Unit the value is expressed in. """
          return self._unit_of_measurement
  
      @property
      def state_attributes(self):
          """ Returns the state attributes. """
          if self.info is not None:
              return {
                  ATTR_VENDOR: self.info['vendor_id'],
                  ATTR_BRAND: self.info['brand'],
                  ATTR_HZ: round(self.info['hz_advertised_raw'][0]/10**9, 2)
              }
  
      def update(self):
          """ Gets the latest data and updates the state. """
          from cpuinfo import cpuinfo
  
          self.info = cpuinfo.get_cpu_info()
          self._state = round(float(self.info['hz_actual_raw'][0])/10**9, 2)
  
subject: Add docstrings