What's new in h5py 3.10
=======================

New features
------------

* h5py now has pre-built packages for Python 3.12.
* Pre-built packages on Linux & Windows now bundle HDF5 version 1.14.2.
  Mac packages still contain HDF5 1.12.2 for now. You can still :ref:`build h5py
  from source <source_install>` against a wider range of HDF5 versions.
* The read-only S3 file driver ('ros3') now accepts an AWS session token
  as part of the credentials (:pr:`2301`). Pass ``session_token`` when opening
  a :class:`.File` (along with the other S3 parameters). This requires HDF5
  1.14.2 or later, with the ROS3 feature built.

Deprecations & removals
-----------------------

* Support for the HDF5 1.8 series was dropped, along with early 1.10 releases.
  The minimum required HDF5 version is now 1.10.4.

Exposing HDF5 functions
-----------------------

* ``H5Pget_fapl_ros3_token`` & ``H5Pset_fapl_ros3_token``

Bug fixes
---------

* Various nasty bugs when using nested compound and vlen data types have been
  fixed (:pr:`2134`).
* Fixed an ``OverflowError`` in some cases when registering a filter with
  :func:`h5z.register_filter`, especially on 32-bit architectures (:pr:`2318`).
* Sequential slicing/indexing operations on a :class:`.VirtualSource` object
  (e.g. ``source[:10][::2]``)  now raise an error, rather than giving incorrect
  results (:pr:`2280`).

Building h5py
-------------

* h5py now uses HDF5's 1.10 compatibility mode at compile time rather than the
  1.8 compatibility mode (:pr:`2320`). This is normally transparent even if you're
  building h5py from source.