#directions to use- place this python file in a folder containing wallpapers and run the python code. That's it. and importantly #run the code as non-sudo user!

wall_changer.py

#directions to use- place this python file in a folder containing wallpapers and run the python code. Thats it. and importantly #run the code as non-sudo user! 
#/usr/bin/env python
import os
from subprocess import call
import glob
import time
wall_change_time = 10
def set_wallpaper(image_file_with_path):
    filepath = os.path.abspath(image_file_with_path)    
    call(['gsettings', 'set', 'org.gnome.desktop.background', 'picture-uri', 'file://%s' % (filepath)])
    return True

#while os.geteuid() == 0:
while(1):    
	for file_jpg in glob.glob("*.jpg"):
		print("your desktop background will be changing.")
		set_wallpaper(file_jpg)
		time.sleep(wall_change_time)