QWidget casts with PyQt?

[Stefan Quandt]

Hi,

I want to access widgets from a Qt container widget e.g.
  item = ToolBox.item( 0 )

I know that the item is a QButtonGroup.
The Qt-Library returns a QWidget pointer.
So what I get is a Python QWidget wrapper object.

How can I access the returned item as what it is (as a QButtonGroup)?

Stefan