new_contents: #!/usr/bin/env python3
  
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are met:
  #
  # 1. Redistributions of source code must retain the above copyright notice, this
  # list of conditions and the following disclaimer.
  #
  # 2. Redistributions in binary form must reproduce the above copyright notice,
  # this list of conditions and the following disclaimer in the documentation
  # and/or other materials provided with the distribution.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  #         SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  # OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  # DAMAGE.
  
  import gi
  gi.require_version('GUPnP', '1.6')
  
  from gi.repository import GUPnP
  from gi.repository import GLib
  from gi.repository import GObject
  
  
  def do_action_invoked(self, action):
      name = action.get_name()
      try:
          candidate = self.__getattribute__(f'do_{name}')
          if callable(candidate):
              candidate(action)
          else:
              action.return_error(401, "Invalid Action")
  
      except IndexError:
          action.return_error(401, "Invalid Action")
  
  
  class SwitchPower(GUPnP.Service):
      __gtype_name__ = "SwitchPower"
  
      def __init__(self):
          super(GUPnP.Service, self).__init__()
          self.target = False
          self.connect("query-variable::Target", self.query_Target)
          self.connect("query-variable::Status", self.query_Status)
  
      def do_action_invoked(self, action):
          name = action.get_name()
          try:
              candidate = self.__getattribute__(f'do_{name}')
              if callable(candidate):
                  candidate(action)
              else:
                  print("Not callable action")
                  action.return_error(401, "Invalid Action")
  
          except IndexError:
              print("No handler...")
              action.return_error(401, "Invalid Action")
  
      def do_query_variable(self, variable):
          try:
              candidate = self.__getattribute__(f'query_{variable}')
              if callable(candidate):
                  return candidate()
          except IndexError:
              pass
  
          return None
  
      def do_SetTarget(self, action):
          value = action.get_value("newTargetValue", bool)
          if self.target != value:
              self.target = value
              self.notify_value("Status", value)
  
          action.return_success()
  
      def do_GetTarget(self, action):
          action.set_value("RetTargetValue", self.target)
          action.return_success()
  
      def do_GetStatus(self, action):
          action.set_value("ResultStatus", self.target)
          # action.return_success()
  
      def query_Status(self):
          print("query_Status")
          return None, self.target
  
      def query_Target(self, value):
          print("query_Target")
          return None, self.target
  
  
  GObject.type_register(SwitchPower)
  
  
  class LightServer(GUPnP.RootDevice):
      __gtype_name__ = "LightServer"
  
      def __init__(self, context: GUPnP.Context):
          resource_factory = GUPnP.ResourceFactory.get_default()
          resource_factory.register_resource_type ("urn:schemas-upnp-org:service:SwitchPower:1", SwitchPower)
          super().__init__(context=context, resource_factory=resource_factory, description_path="BinaryLight1.xml", description_dir=".")
          self.loop = GLib.MainLoop()
          self.init()
          self.service = self.get_service("urn:schemas-upnp-org:service:SwitchPower:1")
  
      def run(self):
          self.set_available(True)
          self.loop.run()
  
  
  if __name__ == '__main__':
      c = GUPnP.Context.new('wlp3s0', 0)
      LightServer(c).run()
  
subject: Add light-server example in python