Hmm, I find it hard to describe it as a short subject, but here's what I seek to do: On the server, I have the structure: class A(pb.Cacheable): [...] class B(pb.Cacheable): def __init__(): self.stuff = A() # This attribute gets replicated. And on the client side, there are the corresponding pb.RemoteCache classes. When an instance of B is replicated, a client-side A gets instantiated and its setCopyableState is called, and the client-side B instance gets its reference to it. So far, so good. But when the client-side A is created and its state has been set, I also want to perform some other processing which requires references to other parts of the client. I would prefer not to make these parts into globals. For example, it could be dependent on the client-side perspective it communicates through, which would be handy if the client connects to multiple servers. I'd like to know if there is an accepted idiom for supplying this? For example, I believe it would have worked if the setCopyableState received the perspective as a third parameter.