I have a big hairy data structure which is a tree of nested dicts.  I have a 
sequence of strings which represents a path through the tree.  Different leaves 
in the tree will be at different depths (which range from 1 to about 4 or 5 at 
most).  I want to get the value stored at that path.  Thus, if

keys = ['foo', 'bar', 'baz']

I want to retrieve tree['foo']['bar']['baz'].

Is there some idiomatic, non-cryptic way to write that as a one-liner?

I'm using Python 2.7.

---
Roy Smith
r...@panix.com

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