i do not talk about python by my data json.
.py files are just in parallel to qml and work fine.
in the first version i had my assets folder in parallel to qml in usr/share…
BUT
one can read from there, not write.
i do copy now my data json files to .local/share/oarg.pawel …
which is anyway better, as usr/share gets removed on uninstall and then all your data would be gone too.