title: Update (repaint) application window (python)
body: <p>LS,
  I am developping an app that reads text from a web page. While the text is processed in the app the app window (gui) shows "application is not responding" (translated from a Dutch warning message). However the app is not frozen because I see it prints in the console window.
  The app gui is designed in Qt designer and converted in python 2.7 code on win7 64 bit.
  How can I force the app to refresh the window and update ?
  Thanks</p>