title: Get a layout's widgets in PyQT
body: <p>I have a <code>QVBoxLayout</code> that I've added a few widgets to, via <code>addWidget()</code>.  I need to now delete those widgets, and it seems I need to use <code>removeWidget()</code> (which takes in a widget to be removed) to do that.</p>
  
  <p>I thought that calling <code>children()</code> or <code>findChildren(QWidget)</code> on my layout would return a list of the widgets I've added into it; I'm in the debugger, though, and am just receiving empty lists.</p>
  
  <p>Am I terribly misunderstanding something?  I've just started doing PyQT this last week and have mostly been learning through trial and error with the API docs.</p>