I'm a layout engineer, so I create layouts of PCB's and integrated circuits for a living. Have been an electronic engineer for over 35 years, and have designed many devices. As a fan of the raspberry PI, I am a forum moderator for the raspberry PI forum. I also like old home-computers, especially the ZX81, of which I'm designing a clone. For work I sometimes also have to write code, often C (C++) for the arduino's that drive some of my designs, and python (3.x) code on the PC. My questions here will primarily be about Python, as I'm not an experienced python programmer.