The xrdtools package can be used to read .xrdml files (Panalytical XPert X-ray diffraction). Not all feature of file format may be supported at the current development state.
For more information please visit http://xrdtools.readthedocs.org/en/latest/ or https://github.com/paruch-group/xrdtools.
Currently, I do not have the time to develop this package any further. Therefore, patches are very sporadic.
In case anyone wants to take over the maintenance, please contact me @bziegler.