'Count activity in this subreddit in all known contexts.
:returns: a named tuple of activity information for each context.'

def count_activity(self):

    assert (self.activity_contexts == ('logged_in',))
    if (not c.activity_service):
        return None
    try:
        with c.activity_service.retrying(attempts=4, budget=0.1) as svc:
            activity = svc.count_activity(self._fullname)
        return self.SubredditActivity(activity)
    except (TApplicationException, TProtocolException, TTransportException):
        return None
