On Thursday, April 3, 2014 8:11:33 AM UTC+5:30, Rustom Mody wrote: > On Wednesday, April 2, 2014 11:28:16 PM UTC+5:30, 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? > > I'm using Python 2.7. > What you are asking for is probably: > >>> reduce((lambda tr, att: tr[att]), ['a','b','c'], nested) > 'Hiii!!' Shorter version: >>> reduce(dict.get, ['a','b','c'], nested) 'Hiii!!' -- https://mail.python.org/mailman/listinfo/python-list
