__getattr__ and pickle

[Christian Tismer]

Sean Mc Grath wrote:
> 
> Thanks to Christian and Gordon, I think I am well on
> the way to pickling Pyxie trees.
> 
> More news anon.

Your pickling was just fine. Now your classes
need to learn how to unpickle, and that's simple:
Add a __setstate__ method that initializes the missing
CurPos object.

cheers - chris

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