Control backlight brightness everywhere!

Can you help me?
After command “sudo pip install select” comes:
Collecting select
Could not find a version that satisfies the requirement select (from versions: )
No matching distribution found for select
I igored it and finished everything to the end. And now backlight is controllable but screen not showing picture, just baclight and black screen. And GS is still running, I still can have an access through ssh
Any suggestions?
Thanks in advance)

Got it! I havent entered whole line of code into “rc.local” - “nohup python /home/cpi/launcher/sys.py/backlight_hotkey.py &”