glade/gtkbuilder example

import sys
import gtk

class TutorialTextEditor:

    def on_window_destroy(self, widget, data=None):
        gtk.main_quit()

    def __init__(self):

        builder = gtk.Builder()
        builder.add_from_file("tutorial.xml") 

        self.window = builder.get_object("window")
        builder.connect_signals(self)       

if __name__ == "__main__":
    editor = TutorialTextEditor()
    editor.window.show()
    gtk.main()