In PyQt 4.5, I have a layout inside another layout.  I'd like to remove the sublayout from its parent, and hide it.  I can say parent_layout.removeItem(child_layout) to remove the layout from its parent, but it still shows on the widget.  I can't find any way to hide it in one step, as QLayout doesn't have a hide() method like QWidget does.
The easy solution would be to have an interior widget, not an interior layout.  You could assign the layout you desire to the widget, then just remove/hide the widget when you want to do so.  A good rule of thumb is if you just want to arrange how widgets appear, then use a layout; if you want to hide/show them as a group, use a widget.
Remove a sublayout in qt?