kb-lights.py script fixed, moved to ~/.scripts

.scripts/kb-lights.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+# coding: utf-8
+
+from sys import argv
+import dbus
+
+
+def kb_light_set(delta):
+    bus = dbus.SystemBus()
+    kbd_backlight_proxy = bus.get_object('org.freedesktop.UPower', '/org/freedesktop/UPower/KbdBacklight')
+    kbd_backlight = dbus.Interface(kbd_backlight_proxy, 'org.freedesktop.UPower.KbdBacklight')
+
+    current = kbd_backlight.GetBrightness()
+    maximum = kbd_backlight.GetMaxBrightness()
+    new = max(0, current + delta)
+
+    if 0 <= new <= maximum:
+        current = new
+        kbd_backlight.SetBrightness(current)
+
+    # Return current backlight level percentage
+    return 100 * current / maximum
+
+if __name__ == '__main__':
+    if len(argv[1:]) == 1:
+        if argv[1] == "--up" or argv[1] == "+":
+            # ./kb-light.py (+|--up) to increment
+            print(kb_light_set(1))
+        elif argv[1] == "--down" or argv[1] == "-":
+            # ./kb-light.py (-|--down) to decrement
+            print(kb_light_set(-1))
+        else:
+            print("Unknown argument:", argv[1])
+    else:
+        print("Script takes exactly one argument.", len(argv[1:]), "arguments provided.")