docs: def via_nupnp():
      """ Use method 2 as described by the Philips guide """
      bridges_from_portal = parse_portal_json()
      logger.info('Portal returned %d Hue bridges(s).',
                   len(bridges_from_portal))
      # Confirm Portal gave an accessible bridge device by reading from the returned
      # location.  Should look like: http://192.168.0.1/description.xml
      found_bridges = {}
      for bridge in bridges_from_portal:
          serial, bridge_info = parse_description_xml(bridge[1])
          if serial:
              found_bridges[serial] = bridge_info
  
      logger.debug('%s', found_bridges)
      if found_bridges:
          return found_bridges
      else:
          raise DiscoveryError('Portal returned nothing')