# Release notes for PyTables 3.6 series

Author:

  PyTables Developers

Contact:

  pytables-dev@googlegroups.com

## 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 gh-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 gh-734.

- More fixes for python 3.8 compatibility: Replace deprecated time.clock with time.perf_counter. See gh-744 and gh-745. Thanks to Sergio Pascual (sergiopasra).

- Improvements in tests as well as clean up from dropping Python 2.7 support. Thanks to Seth Troisi (sethtroisi).