Hello, I thought the numpy/scipy community might be particularly interested in this library, so here goes: I'm pleased to announce a release of the next version of TreeDict, a dictionary-like, hierarcical python container to simplify the bookkeeping surrounding parameters, variables and data. It aims to be fast, lightweight, intuitive, feature-rich and stable. While intended for general python coding, it includes a number of features particularly useful for scientific programming. It is similar in basic functionality to MATLAB structures in terms of concise syntax and implicit branch creation, which, I've found, makes organizing parameters/data much easier than with other methods. In addition, though, TreeDict implements all the methods of regular dictionaries, pickling, fast non-intersecting hashing for efficient cache lookups, manipulations on the tree structure, a system for forward referencing branches to make lists of parameters more readable, BSD license, and a full suite of unit tests. More info can be found at http://www.stat.washington.edu/~hoytak/code/treedict/index.html. Questions or comments or feedback are welcome. Thanks! --Hoyt P.S. One thought regarding scipy -- since this library is fairly similar to matlab structs, it may be easy to integrate this with the current matlab io routines to translate things between the two more easily. In this direction, I've added in options to two methods, fromdict and convertTo, to make conversion to/from the existing python representations of the matlab objects. Discussion/comments on this point are welcome. ++++++++++++++++++++++++++++++++++++++++++++++++ + Hoyt Koepke + University of Washington Department of Statistics + http://www.stat.washington.edu/~hoytak/ + hoytak@gmail.com ++++++++++++++++++++++++++++++++++++++++++