What's new in h5py 2.1 ====================== Dimension scales ---------------- H5py now supports the Dimension Scales feature of HDF5! Thanks to Darren Dale for implementing this. You can find more information on using scales in the :ref:`dimension_scales` section of the docs. Unicode strings allowed in attributes ------------------------------------- Group, dataset and attribute names in h5py 2.X can all be given as unicode. Now, you can also store (scalar) unicode data in attribute values as well:: >>> myfile.attrs['x'] = u"I'm a Unicode string!" Storing Unicode strings in datasets or as members of compound types is not yet implemented. Dataset size property --------------------- Dataset objects now expose a ``.size`` property which provides the total number of elements in the dataspace. ``Dataset.value`` property is now deprecated. --------------------------------------------- The property ``Dataset.value``, which dates back to h5py 1.0, is deprecated and will be removed in a later release. This property dumps the entire dataset into a NumPy array. Code using ``.value`` should be updated to use NumPy indexing, using ``mydataset[...]`` or ``mydataset[()]`` as appropriate. Bug fixes --------- * Object and region references were sometimes incorrectly wrapped wrapped in a ``numpy.object_`` instance (issue 202) * H5py now ignores old versions of Cython (<0.13) when building (issue 221) * Link access property lists weren't being properly tracked in the high level interface (issue 212) * Race condition fixed in identifier tracking which led to Python crashes (issue 151) * Highlevel objects will now complain if you try to bind them to the wrong HDF5 object types (issue 191) * Unit tests can now be run after installation (issue 201)