I am designing a mobile application to run on a Raspberry Pi 3 model B. It will not have any Internet access. I need to generate a static image consisting of a simple arc representing (say) a speedometer or a pressure gauge. The image will need to be regenerated every 5 seconds. The image must be displayed in a web browser (served by gunicorn running on the Pi). I prefer it to be a PNG but that is only a preference.
Plotly is amazing but big and slow. Pygal looked acceptable but Internet access is required to render the SVG. Has anyone any suggestion for a lightweight solution? Roy -- https://mail.python.org/mailman/listinfo/python-list
