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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def invoke(self, request_envelope, context):
 # type: (RequestEnvelope, Any) -> ResponseEnvelope """Invokes the dispatcher, to handle the request envelope and return a response envelope. :param request_envelope: Request Envelope instance containing request information :type request_envelope: RequestEnvelope :param context: Context passed during invocation :type context: Any :return: Response Envelope generated by handling the request :rtype: ResponseEnvelope """

        if (self.skill_id is not None and
                request_envelope.context.system.application.application_id !=
                self.skill_id):
            raise AskSdkException("Skill ID Verification failed!!")

        if self.api_client is not None:
            api_token = request_envelope.context.system.api_access_token
            api_endpoint = request_envelope.context.system.api_endpoint
            api_configuration = ApiConfiguration(
                serializer=self.serializer, api_client=self.api_client,
                authorization_value=api_token,
                api_endpoint=api_endpoint)
            factory = ServiceClientFactory(api_configuration=api_configuration)
        else:
            factory = None

        attributes_manager = AttributesManager(
            request_envelope=request_envelope,
            persistence_adapter=self.persistence_adapter)

        handler_input = HandlerInput(
            request_envelope=request_envelope,
            attributes_manager=attributes_manager,
            context=context,
            service_client_factory=factory)

        response = self.request_dispatcher.dispatch(
            handler_input=handler_input)
        session_attributes = None

        if request_envelope.session is not None:
            session_attributes = (
                handler_input.attributes_manager.session_attributes)

        return ResponseEnvelope(
            response=response, version=RESPONSE_FORMAT_VERSION,
            session_attributes=session_attributes,
            user_agent=user_agent_info(
                sdk_version=__version__,
                custom_user_agent=self.custom_user_agent))