python HDF5 for Python (h5py) is a general-purpose simple Python interface to the Hierarchical Data Format library, version 5. Existing Python and Numpy concepts are used for the interface. Almost all HDF5 features are available from Python, including things like compound datatypes (as used with Numpy recarray types), HDF5 attributes, hyperslab and point-based I/O, and more recent features in HDF 1.8 like resizable datasets and recursive iteration over entire files.