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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(self, sender, **named):
 """ Send signal from sender to all connected receivers. If any receiver raises an error, the error propagates back through send, terminating the dispatch loop. So it's possible that all receivers won't be called if an error is raised. Arguments: sender The sender of the signal. Either a specific object or None. named Named arguments which will be passed to receivers. """

        responses = []
        if not self.receivers or self.sender_receivers_cache.get(sender) is NO_RECEIVERS:
            return responses

        for receiver in self._live_receivers(sender):
            response = receiver(signal=self, sender=sender, **named)
            responses.append((receiver, response))
        return responses