Marvel Comic Downloader Webkit

#!/usr/bin/env python

import gtk, webkit, urllib2

x=100

def update_buttons(view, frame, resource, request, response):
   global x
   url=request.get_uri()
   if "jpg?" in url:
     print url
     u = urllib2.urlopen(url)
     file = open( str(x) + '.jpg','w')
     file.write(u.read())
     file.close()
     x+=1

win = gtk.Window()
win.connect('destroy', lambda w: gtk.main_quit())
win.show()

box1 = gtk.HBox()
win.add(box1)

web = webkit.WebView()
web.connect("resource-request-starting", update_buttons)
box1.pack_start(web)

web.open("https://marvel.com/digitalcomics/view.htm?iid=23569")

box1.show_all()

gtk.main()