text: ###############################################################################
  #
  # The MIT License (MIT)
  #
  # Copyright (c) Tavendo GmbH
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  #
  ###############################################################################
  
  from os import environ
  from twisted.internet import reactor
  from twisted.internet.defer import inlineCallbacks
  
  from autobahn.wamp.types import CallOptions
  from autobahn.twisted.wamp import ApplicationSession, ApplicationRunner
  
  
  class Component(ApplicationSession):
      """
      Application component that consumes progressive results.
      """
  
      @inlineCallbacks
      def onJoin(self, details):
          print("session attached")
  
          def on_progress(i):
              print("Progress: {}".format(i))
  
          res = yield self.call(u'com.myapp.longop', 3, options=CallOptions(on_progress=on_progress))
  
          print("Final: {}".format(res))
  
          self.leave()
  
      def onDisconnect(self):
          print("disconnected")
          reactor.stop()
  
  
  if __name__ == '__main__':
      runner = ApplicationRunner(
          environ.get("AUTOBAHN_DEMO_ROUTER", u"ws://127.0.0.1:8080/ws"),
          u"realm1",
      )
      runner.run(Component)
  