No module named glib

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/epidermis/creator.py", line 443, menuSave_callback(self=<__main__.CreatorApp instance at 0x837c3ec>, widget=<gtk.ToolButton object at 0x859ca04 (GtkToolButton at 0x85c9910)>)
        def menuSave_callback(self, widget):
            self.save()
  variables: {'self.save': ('local', <bound method CreatorApp.save of <__main__.CreatorApp instance at 0x837c3ec>>)}
  File "/usr/lib/python2.5/site-packages/epidermis/creator.py", line 303, save(self=<__main__.CreatorApp instance at 0x837c3ec>)
            if not previewFile is None:
                import glib
                try:
  variables: {'glib': (None, None)}
ImportError: No module named glib

I'm on Ubuntu 8.04