title: Get progress back from shutil file copy thread
body: <p>I've got an application from which a file is copied from <code>src</code> to <code>dst</code>:</p>
  
  <pre><code>import shutil
  from threading import Thread
  
  t = Thread(target=shutil.copy, args=[ src, dst ]).start()
  </code></pre>
  
  <p>I wish to have the application query the progress of the copy every 5 seconds without locking up the application itself. Is this possible?</p>
  
  <p>My intention is to set this progress to a <code>QtGui.QLabel</code> to give the user feedback on the file copy.</p>
  
  <p>Can this be achieved when copying using a threaded shutil file copy?</p>