Get the active window in Gtk using the wnck library.

get_active_window.py

import wnck
import gtk
import time

if __name__ == '__main__':
  screen = wnck.screen_get_default()
  screen.force_update()
  while True:
    while gtk.events_pending():
      gtk.main_iteration()
    time.sleep(0.5)
    print screen.get_active_window().get_name()

I wish I found this 7 hours ago. I was very confused why my program doesn't upgrade it's window and I was totally mad for the past 7 hours trying to figure out what's the problem. I actually thought that the screen.force_update() was doing the update, but now I know it doesn't. The

while gtk.events_pending():
    gtk.main_iteration()

lines were my gem. Thanks a ton.