old_contents: """Support for Verizon FiOS Quantum Gateways."""
  import logging
  
  from requests.exceptions import RequestException
  import voluptuous as vol
  
  from homeassistant.components.device_tracker import (
      DOMAIN,
      PLATFORM_SCHEMA,
      DeviceScanner,
  )
  from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_SSL
  import homeassistant.helpers.config_validation as cv
  
  _LOGGER = logging.getLogger(__name__)
  
  DEFAULT_HOST = "myfiosgateway.com"
  
  PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
      {
          vol.Optional(CONF_HOST, default=DEFAULT_HOST): cv.string,
          vol.Optional(CONF_SSL, default=True): cv.boolean,
          vol.Required(CONF_PASSWORD): cv.string,
      }
  )
  
  
  def get_scanner(hass, config):
      """Validate the configuration and return a Quantum Gateway scanner."""
      scanner = QuantumGatewayDeviceScanner(config[DOMAIN])
  
      return scanner if scanner.success_init else None
  
  
  class QuantumGatewayDeviceScanner(DeviceScanner):
      """This class queries a Quantum Gateway."""
  
      def __init__(self, config):
          """Initialize the scanner."""
          from quantum_gateway import QuantumGatewayScanner
  
          self.host = config[CONF_HOST]
          self.password = config[CONF_PASSWORD]
          self.use_https = config[CONF_SSL]
          _LOGGER.debug("Initializing")
  
          try:
              self.quantum = QuantumGatewayScanner(
                  self.host, self.password, self.use_https
              )
              self.success_init = self.quantum.success_init
          except RequestException:
              self.success_init = False
              _LOGGER.error("Unable to connect to gateway. Check host.")
  
          if not self.success_init:
              _LOGGER.error("Unable to login to gateway. Check password and " "host.")
  
      def scan_devices(self):
          """Scan for new devices and return a list of found MACs."""
          connected_devices = []
          try:
              connected_devices = self.quantum.scan_devices()
          except RequestException:
              _LOGGER.error("Unable to scan devices. Check connection to router")
          return connected_devices
  
      def get_device_name(self, device):
          """Return the name of the given device or None if we don't know."""
          return self.quantum.get_device_name(device)
  
new_contents: """Support for Verizon FiOS Quantum Gateways."""
  import logging
  
  from quantum_gateway import QuantumGatewayScanner
  from requests.exceptions import RequestException
  import voluptuous as vol
  
  from homeassistant.components.device_tracker import (
      DOMAIN,
      PLATFORM_SCHEMA,
      DeviceScanner,
  )
  from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_SSL
  import homeassistant.helpers.config_validation as cv
  
  _LOGGER = logging.getLogger(__name__)
  
  DEFAULT_HOST = "myfiosgateway.com"
  
  PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
      {
          vol.Optional(CONF_HOST, default=DEFAULT_HOST): cv.string,
          vol.Optional(CONF_SSL, default=True): cv.boolean,
          vol.Required(CONF_PASSWORD): cv.string,
      }
  )
  
  
  def get_scanner(hass, config):
      """Validate the configuration and return a Quantum Gateway scanner."""
      scanner = QuantumGatewayDeviceScanner(config[DOMAIN])
  
      return scanner if scanner.success_init else None
  
  
  class QuantumGatewayDeviceScanner(DeviceScanner):
      """This class queries a Quantum Gateway."""
  
      def __init__(self, config):
          """Initialize the scanner."""
  
          self.host = config[CONF_HOST]
          self.password = config[CONF_PASSWORD]
          self.use_https = config[CONF_SSL]
          _LOGGER.debug("Initializing")
  
          try:
              self.quantum = QuantumGatewayScanner(
                  self.host, self.password, self.use_https
              )
              self.success_init = self.quantum.success_init
          except RequestException:
              self.success_init = False
              _LOGGER.error("Unable to connect to gateway. Check host.")
  
          if not self.success_init:
              _LOGGER.error("Unable to login to gateway. Check password and " "host.")
  
      def scan_devices(self):
          """Scan for new devices and return a list of found MACs."""
          connected_devices = []
          try:
              connected_devices = self.quantum.scan_devices()
          except RequestException:
              _LOGGER.error("Unable to scan devices. Check connection to router")
          return connected_devices
  
      def get_device_name(self, device):
          """Return the name of the given device or None if we don't know."""
          return self.quantum.get_device_name(device)
  
subject: Move imports to top for quantum_gateway (#29327)