title: Tkinter - Setting the Current Selection in TextWidget
body: <p>I am looking for a way to set the current selection inside a Tkinter text widget.</p>
  
  <p>I already tried to set it with <code>mark_set()</code>, but it doesn't work...</p>
  
  <pre><code>text_widget.mark_set("sel.first", 1.0)
  text_widget.mark_set("sel.last",  END)
  </code></pre>
  
  <p>Would anyone know how to work this one out?</p>