To fix the issue when using pandas HDFStore class, upon creating an HDFStore object:

x = HDFStore(’test.h5’) Warning! HDF5 library version mismatched error

or if you get a similar error upon import h5py, then apply the following upgrade(s)

Windows / macOS / Linux / WSL:

conda install --upgrade pandas pytables h5py

or if not using Anaconda Python:

pip install --upgrade pandas tables h5py

This will take several minutes, as often Numpy will be upgraded as well.