What’s new in h5py 3.4

New features

  • The pre-built wheels now bundle HDF5 1.12.1 (PR 1945).

  • len() now works on dset.astype(), .asstr() and .fields() wrappers (PR 1913).

Bug fixes

  • Fix bug introduced in version 3.3 that did not allow the creation of files using the flag “a” for certain drivers (e.g. mpiio, core and stdio) (PR 1922).

  • Dataset indexing will now use the optimized fast path, which was accidentally disabled in a previous version (PR 1944).

  • Fix an error building with Cython 3.0 alpha 8 (cpdef inside functions) (PR 1923).