Bulk renaming operation performed across multiple HDF5 files

Hi all,

I've decided that datasets like '*_foo_*' really, really should have
been named '*_bar_*' in my application.

Aside from h5py-ish approaches like those mentioned at
https://groups.google.com/forum/?fromgroups=#!topic/h5py/rGqWfX-H4No,
does anyone have a cute utility for such renaming operations?

- Rhys