title: How can I pass variables between two classes/windows in PyGtk?
body: <p>I am starting out with PyGtk and am having trouble understanding the interaction of windows.</p>
  
  <p>My very simple question is the following.<br>
  Suppose I have a class that simply creates a window with a text-entry field. When clicking the "ok" button in that window, I want to pass the text in the entry field to another window, created by another class, with a gtk menu and create a new entry with the content of the text field.</p>
  
  <p>How do I implement this?</p>