Hi Maxim, > Attached is a small rework of your original patch. I've made the Python > script standalone, which should make it easier to maintain. I've also > refactored the tests somewhat and added your copyright information. > Is this OK with you? sure, no problem with the refactoring in gerenal, but I think you used an old patchset. I sent a v2 to this issue, which had some changes to the scripts and tests. I can’t test your patch properly unfortunately, because `make check` does not work on core-updates and trying to build any Python package on core-updates triggers the requirements checker immediately: validating 'attrs' /gnu/store/hdjip92izsf9anfhd6ijgc9glvbi4dzv-python-attrs-bootstrap-19.3.0/lib/python3.9/site-packages ...checking requirements: ERROR: attrs==19.3.0 The 'attrs==19.3.0' distribution was not found and is required by the application”) Maybe that’s an issue with Python 3.9? Cheers, Lars