gtk.Expander, what to do when going back from expanded mode

["Morten O. Hansen" <morteoh chello no>]

Hi,

I have a small project in pygtk I'm working on, and I'm using an
gtk.Expander to show/hide some widgets. Everything is working OK, but
when the expander is going back from expanded mode, the main widget need
to be resized (since the window initially was a lot smaller), 

What is the common way to do this? I don't want to have resizable=off in
my Widget.

With regards, Morten O. Hansen