PyHL is just like the HL-HDF library in that it allows the user to work with HDF5 at a high level. PyHL is designed to work at the highest level of abstraction using the Python programming language, since Python allows the user to interact directly with HDF5 files. In fact, PyHL is nothing more than a wrapper around HL-HDF but with some additional functionality which is only available in very high level languages such as Python. Like HL-HDF, it is up to the user to define appropriate ways of representing data and using the building blocks available in PyHL to store the data in HDF5.
(PyHL is pronounced ``pile'', which is an appropriate description of a heirarchy ...)