wallpaper changer for Gnome3 (tested on gnome 3.12)

wallpaper-change-gnome3.py

import os
import random
import time
import subprocess
random.seed()
full_files = []
rootdir = "/home/dbehnke/wallpapers"
sleeptime = 300
while 1:
    print("reading pictures from ", rootdir)
    for root, subdirs, files in os.walk(rootdir):
        for file in files:
            if file.endswith(".jpg"):
                full_files.append(os.path.join(root, file))
            if file.endswith(".png"):
                full_files.append(os.path.join(root, file))

    random.shuffle(full_files)
    i = 0
    for file in full_files:
        i += 1
        print("#%d %s" % (i, file))
    
    i = 0
    for file in full_files:
        i += 1
        print("changing picture to %d of %d - %s" % (i, len(full_files), file))
        subprocess.call(['gsettings', 'set', 'org.gnome.desktop.background',
            'picture-uri', file])
        time.sleep(sleeptime)