[pygtk] Confused about a widget's name

[Skip Montanaro]

I'm returning to PyGTK programming after a long hiatus.  When last I
visited these waters, I used Gtk 2.12.  Now I use 2.22 and this
Builder thing, which, I must admit, has me a bit confused.

In a signal callback for a radio button, if I ask for its name
(rb.get_name()) I always get "GtkRadioButton".  If I call get_property
with "name" as the argument, I get the empty string.  Looking at the
docs for gtk.Builder, I saw this:

"Objects must be given a name with the "id" attribute, which allows
the application to retrieve them from the builder with get_object().
An id is also necessary to use the object as property value in other
parts of the UI definition.

Note: Prior to GTK+ 2.20, gtk.Builder was setting the "name" property
of constructed widgets to the "id" attribute. In GTK+ 2.20 or newer,
you have to use gtk.Buildable.get_name() instead of
gtk.Widget.get_name() to obtain the "id", or set the "name" property
in your UI definition."

I can't tell what object gtk.Buildable is supposed to refer to.  I
have a reference to a widget (in this case, a radio button, but I
think the problem is more general than that).  How do I retrieve the
name I gave it in Glade?

Thx,

Skip Montanaro