docs: def connect(nodes):
      '''
      Connect a list of nodes.
  
      Connected nodes have an ``output`` member which is the following node in
      the line. The last node's ``output`` is a :class:`Queue` for
      easy plumbing.
      '''
      for a, b in zip(nodes[:-1], nodes[1:]):
          a.output = b
      b.output = queues.Queue()