from pynput.mouse import Button, Controller
import evdev

# to stop knob from setting volume:

# xinput list
# ↳ HID 8808:660c Keyboard                  	id=17	[slave  keyboard (3)]

# xinput disable 17

devices = [evdev.InputDevice(path) for path in evdev.list_devices()]
for device in devices:
    if device.name == 'HID 8808:660c Keyboard':
        break
else:
    raise ValueError('not found')

device = evdev.InputDevice(device.path)
mouse = Controller()

scroll_per_step = 2

for event in device.read_loop():
    if event.value == 1:
        if event.code == 114:
            mouse.scroll(0, 1 * scroll_per_step)
        elif event.code == 115:
            mouse.scroll(0, -1 * scroll_per_step)