class Node(object):
  def __init__(self):
    # Properties will go here!

@@ -45,29 +45,310 @@
   # 
-Properties will go here!
+Node(s) from which this Node receives values%0A    self.inbound_nodes = inbound_nodes%0A    # Node(s) to which this Node passes values%0A    self.outbound_nodes = %5B%5D%0A    # For each inbound Node here, add this Node as an outbound to that Node.%0A    for n in self.inbound_nodes:%0A      n.outbound_nodes.append(self)
 %0A

Initialize inbound and outbound Nodes of a Node