A Python cron-job that automatically sets desktop wallpapers from my Box cloud account

change-wallpaper.py

#!/usr/bin/python

import random
import os
import subprocess
import sys
from PIL import Image

ROOT_DIR = os.path.expanduser("~/Mount/box")
WALLPAPER_DIR = os.path.join(ROOT_DIR, "Pictures")
CHANGE_WALLPAPER_CMD = "gsettings set org.gnome.desktop.background picture-uri 'file://{}'"
MIN_RESOLUTION = (1920, 1080)


def get_random_file(directory):
    files = os.listdir(directory)
    chosen_file = random.choice(files)
    return os.path.join(directory, chosen_file)


def set_wallpaper(wallpaper):
    command = CHANGE_WALLPAPER_CMD.format(wallpaper)
    return subprocess.call(command.split())


if not os.path.exists(WALLPAPER_DIR):
    sys.exit(1)

while True:
    wallpaper = get_random_file(WALLPAPER_DIR)
    img = Image.open(wallpaper)
    width, height = img.size

    if (width, height) >= MIN_RESOLUTION:
        set_wallpaper(wallpaper)
        print(wallpaper)
        break