On Wed, 02 Apr 2014 13:58:16 -0400, Roy Smith wrote:
> 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?
Er, idiomatic one liner? No, not really. But a helper function makes
nearly anything into a one-liner:
def traverse(tree, *keys):
t = tree
for k in keys:
t = t[k]
return t
# one-liner
leaf = traverse(tree, *list_of_keys)
--
Steven
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