kde5-plasma-desktop-wallpaper-randomizer

#!/usr/bin/env python

import os
import random
import subprocess
from textwrap import dedent

image_dir = "/home/nando/Pictures/nasa"


def get_wallpaper(image_dir):
  image = random.choice(os.listdir(image_dir))
  image_path = os.path.join(image_dir, image)
  print(image_path)
  return(image_path)

def make_dbus_script(image_path):
  dbus_script = dedent('''\
    var Desktops = desktops();
    for (i=0;i<Desktops.length;i++) {{
      d = Desktops[i];
      d.wallpaperPlugin = "org.kde.image";
      d.currentConfigGroup = Array("Wallpaper", "org.kde.image", "General");
      d.writeConfig("Image", "file://{}")
    }}
  ''').format(image_path)
  print(dbus_script)
  return(dbus_script)

def set_wallpaper(dbus_script):
  subprocess.Popen([
    'dbus-send',
    '--session',
    '--dest=org.kde.plasmashell',
    '--type=method_call',
    '/PlasmaShell',
    'org.kde.PlasmaShell.evaluateScript',
    'string:{}'.format(dbus_script)
  ])

image_path = get_wallpaper(image_dir)
dbus_script = make_dbus_script(image_path)
set_wallpaper(dbus_script)