PyQt-Purchasing is a set of Python bindings for The Qt Company's Qt Purchasing library. It is available for PyQt5.
Like Qt Purchasing, PyQt-Purchasing is available under the GPL v3 and a commercial license. The commercial version of PyQt-Purchasing is bundled with the commercial version of PyQt. You can purchase the commercial version of PyQt here.
Please contact sales@riverbankcomputing.com if you would like a copy of the Riverbank Commercial License.