putting glade interface in python

Question

I've made a gui in glade that I want to put in a python program. I was adapting the instructions from a tutorial I found online to load in my glade file (http://www.pygtk.org/articles/pygtk-glade-gui/Creating_a_GUI_using_PyGTK_and_Glade.htm). When I had problems I tried something basic (one button) calling it the same thing as in that tutorial, and copy pasting their code, and it still didn't work. I also took a look at (http://www.linuxjournal.com/article/6586?page=0,2), which has a function being called slightly differently ("self.wTree=gtk.glade.XML (gladefile,windowname)" instead of without windowname), and implemented an equivalent with mine and that didn't fix it. I definitely have pygtk working, I made something without using glade before and it worked fine. The error I'm getting is:

/usr/share/themes/NOX/gtk-2.0/gtkrc:233: Murrine configuration option "gradients" 
 is no longer supported and will be ignored.

(helloWorld.py:9804): libglade-WARNING **: Expected <glade-interface>.  Got    
 <interface>.

(helloWorld.py:9804): libglade-WARNING **: did not finish in PARSER_FINISH state
Traceback (most recent call last):
File "helloWorld.py", line 31, in <module>
hwg = HellowWorldGTK()
File "helloWorld.py", line 22, in __init__
self.wTree = gtk.glade.XML(self.gladefile) 
RuntimeError: could not create GladeXML object

I'm running xubuntu 11.04. The Murrine configuration thing comes up when any gtk application opens, but I included it in case it is relevant. Here's the code I took from the tutorial (but isn't working)

#!/usr/bin/env python

import sys
try:
    import pygtk
    pygtk.require("2.0")
except:
    pass
try:
    import gtk
    import gtk.glade
except:
    sys.exit(1)

class HellowWorldGTK:
"""This is an Hello World GTK application"""

def __init__(self):

    #Set the Glade file
    self.gladefile = "PyHelloWorld.glade"  
    self.wTree = gtk.glade.XML(self.gladefile) 

    #Get the Main Window, and connect the "destroy" event
    self.window = self.wTree.get_widget("MainWindow")
    self.window.show()
    if (self.window):
        self.window.connect("destroy", gtk.main_quit)


if __name__ == "__main__":
    hwg = HellowWorldGTK()
    gtk.main()

Answer 1

Try with this code:

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import pygtk
pygtk.require("2.0")
import gtk
import gtk.glade

class HellowWorldGTK:

    def __init__(self):
        self.gladefile = "helloworld.glade" 
        self.glade = gtk.Builder()
        self.glade.add_from_file(self.gladefile)
        self.glade.connect_signals(self)
        self.glade.get_object("MainWindow").show_all()

    def on_MainWindow_delete_event(self, widget, event):
        gtk.main_quit()

if __name__ == "__main__":
    try:
        a = HellowWorldGTK()
        gtk.main()
    except KeyboardInterrupt:
        pass

Remember: In Glade, Edit the "Preferences" of the file to "GTKBuilder" (not "libglade")