code: def load_state(cls, fname):
          
          log.info("Loading state from %s", fname)
          with open(fname, 'rb') as file:
              data = pickle.load(file)
          svr = Server(data['ksize'], data['alpha'], data['id'])
          if data['neighbors']:
              svr.bootstrap(data['neighbors'])
          return svr
docs: Load the state of this node (the alpha/ksize/id/immediate neighbors)
          from a cache file with the given fname.