All popular Python packages include metadata in their setup.py/PKG-INFO in the form of Trove Classifiers, as defined in PEP 0314 and PEP 0301.

These metadata are both very rich and designed to be machine-readable, which makes them a perfect source of information for the metadata translator. A full list of these classifiers is available on PyPI.

CodeMeta's crosswalk table also suggests translations from a subset of these classifiers to the CodeMeta vocabulary. Some other classifiers could be translated to keywords.