reported: https://github.com/FreeCAD/FreeCAD_Conda/issues/16 ref1: https://stackoverflow.com/questions/12274606/theres-no-next-function-in-a-yield-generator-in-python-3
reported: https://github.com/FreeCAD/FreeCAD_Conda/issues/16 ref1: https://stackoverflow.com/questions/12274606/theres-no-next-function-in-a-yield-generator-in-python-3