Steps: 1. Make the file executable. 2. Create two keyboard shortcuts - /home/some_user/scripts/this_file.py -up - /home/some_user/scripts/this_file.py -down

brightness.py

#!/usr/bin/env python
 
import subprocess
from sys import argv
 
 
MAX = 1.0
MIN = 0.05
STEP = 0.1
 
 
def run_process(exe):
    p = subprocess.Popen(exe, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    while(True):
        retcode = p.poll()
        line = p.stdout.readline()
        yield line
        if(retcode is not None):
            break
 
def get_brightness():
    for line in run_process(['xrandr', '--verbose']):
        if 'Brightness' in line:
            return float(line.split(':')[1].strip())
 
def set_brightness(brightness):
    subprocess.Popen(['xrandr', '--output', 'eDP1', '--brightness', '%s' % brightness])
 
def up():
    bright = get_brightness()
    new_bright = bright + STEP if bright < MAX else bright
    set_brightness(min(new_bright, MAX))
 
def down():
    bright = get_brightness()
    new_bright = bright - STEP if bright > MIN else bright
    set_brightness(max(new_bright, MIN))
 
 
if __name__ == "__main__":
    if len(argv) == 2:
        func = argv[1]
        if func == '-up':
            up()
        if func == '-down':
            down()