Hi There is a new package in Debian https://tracker.debian.org/pkg/pyqt-qwt
that builds on the Qt5 version of Qwt6. It should not be difficult to upgrade the package from PyQwt5 to PyQt-Qwt. Since Python2 is also becoming obsolete in Debian, PyQt-Qwt is only compiled for Python3 in Debian Regards Gudjon
