[H-GEN] pygtk/bonobo query

[Peter Robinson]

I am writing a simple applet in Python to manage an sshfs mount and I 
have struck a problem I can't find an answer for (I am a pygtk newbie)

I have set up the right button menu as follows


# Right button menu
MENU_XML = '''\
<popup name="button3">
    <menuitem name="Mounted" verb="Mounted" _label="Mounted"
    type = "radio" group = "choice"/>
    <menuitem name="Unmounted" verb="Unmounted" _label="Unmounted"
    type = "radio" group = "choice"/>
    <separator/>
    <menuitem name="Preferences" verb="Preferences" _label="_Preferences"
        pixtype="stock" pixname="gtk-properties"/>
    <menuitem name="About" verb="About" _label="_About"
        pixtype="stock" pixname="gtk-about"/>
</popup>
'''

and later did the following to set up the callback for the radio buttons 
and other menu items

        popup = self.applet.get_popup_component()
        popup.connect('ui-event', self.mounted)
        verbs = [("Preferences", self.on_prefs), ("About", self.on_about)]
        self.applet.setup_menu(MENU_XML, verbs, None)

That works fine - the initial position of the radio buttons is with 
mounted set and my callback manages the toggle OK

My question is how can I set the initial settings of the radio buttons 
based on a test - specifically if the sshfs fails then
I want to set the unmounted radio button.

After many frustrating hours of google'ing I can't find a solution - I 
assume it is possible (and probably easy :(  )

Peter Robinson