https://pyobjc.readthedocs.io/en/latest/examples/Quartz/Programming%20with%20Quartz/CocoaDrawingShell/index.html
CocoaDrawingShell - PyObjC - the Python to Objective-C bridge
Download Example A PyObjC Example without documentation Sources: MyView.py main.py setup.py
objective cpyobjcpythonbridge