[barbarik@autobot /]$ sudo python3 ~/.local/share/plasma/desktoptheme/breeze-alphablack/setpanelopacity.py 0.25
[Errno 2] No such file or directory: '/root/.local/share/plasma/desktoptheme/breeze-alphablack/_templates/widgets/panel-background.svg'
python3 setpanelopacity.py [opacity]
        [opacity] is a real number from 0.0 to 1.0
        Eg: python3 setpanelopacity.py 0.6
[barbarik@autobot /]$