RELEASE_NOTES.txt

=======================================
 Release notes for PyTables 3.6 series
=======================================

:Author: PyTables Developers
:Contact: pytables-dev@googlegroups.com

.. py:currentmodule:: tables


Changes from 3.6.1 to 3.6.x
===========================

Improvements
------------
 - Windows: Significantly faster `import tables` PR #781. Thanks to Christoph Gohlke.
 - Internal C-Blosc sources updated to 1.21.0.  Note that, starting from C-Blosc 1.19 does
   not include the Snappy codec sources anymore, so Snappy will be not available if you
   compile from included sources; other packages (like conda or wheels), may (or may not)
   include it.

Bugfixes
--------
 - Fix `pkg-config` (setup.py) for Python 3.9 on Debian. Thanks to Marco Sulla PR #792.
 - Fix ROFileNode fails to return the fileno() (:issue:`633`).


Changes from 3.6.0 to 3.6.1
===========================

Maintenance release to fix packaging issues. No new features or bugfixes.


Changes from 3.5.3 to 3.6.0
===========================

PyTables 3.6 no longer supports Python 2.7 see PR #747.

Improvements
------------
 - Full python 3.8 support.
 - On Windows PyTables wheels on PyPI are linked to `pytables_hdf5.dll` instead of
   `hdf5.dll` to prevent collisions with other packages/wheels that also vendor `hdf5.dll`.
   This should prevent problems that arise when a different version of a dll is imported
   that the version to which the program was linked to. This problem is known as "DLL Hell".
   With the renaming of the HDF5 DLL to `pytables_hdf5.dll` these problems should be solved.

Bugfixes
--------
- Bugfix for HDF5 files/types with padding. For details see :issue:`734`.
- More fixes for python 3.8 compatibility: Replace deprecated time.clock
  with time.perf_counter
  Thanks to Sergio Pascual (sergiopasra). see :issue:`744` and PR #745.
- Improvements in tests as well as clean up from dropping Python 2.7 support.
  Thanks to Seth Troisi (sethtroisi).