pythonOCC

pythonOCC provides a python wrapper for the OpenCASCADE C++ technology.

Project was started in 2008, it's a 13 years old technology that can be considered as mature. The original purpose, that still continues to drive the development, is to extend the OCCT audience (mostly C++ developers) to the Python community. 

There is a double benefit from using OCCT together with Python: 

1. no need for any C++ skill, complex C++ compiler environment or compilation workflows, native multiplatform development; 
2. access the wide Python data science ecosystem (NumPy, scipy, meshers, AI libraries, Jupyter and Voila, etc.). 

This makes the complexity of OCCT easily accessible to business end-users (architects, mechanical engineers) familiar with Python.

pythonOCC is distributed under the terms of the LGPL license and can be embedded in commercial software. Since it was started, it has been used in many free and open source projects (IfcOpenShell, pyGem). It is considered as a strong basis by academic and industrial/building industry, industrial researchers in the field of 3D CAD/BIM/CAM/automotive/aerospace/building industry, see for example.