Primitive screen brightness tool, using python and xrandr, that allows to control individual monitor brightness. The app itself is basically a GUI wrapper around xrandr.
https://github.com/Fushko/gammy for inspiration (Gammy works great, but does not let me control screens individually)
First, sorry for my python, this is probably very ugly and python is not my strongest language. Oh well :)
The app itself is very simple wrapper around XRANDR (which needs to be installed on the system). It will use it's output to find connected screen outputs and create a brightness slider for each of them.
You can then unse sliders to change brightness of each screen, and the app will again use xrandr to update monitor brightness.