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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 send_request(self, request):
 """ Add itself to the observing list :param request: the request :return: the request unmodified """

        if request.observe == 0:
            # Observe request
            host, port = request.destination
            key_token = hash(str(host) + str(port) + str(request.token))

            self._relations[key_token] = ObserveItem(time.time(), None, True, None)

        return request