title: How to filter items in QListWidget
body: <p>I have the following QlistWidget:</p>
  
  <pre><code>self.myListWidget1 = QListWidget()    
  
  os.chdir("./Downloads")
  for file in glob.glob("*.pdf"):
    QListWidgetItem(file, self.myListWidget1)
  self.myListWidget1.sortItems()
  </code></pre>
  
  <p>How can I add a QLineEdit that is able to filter items in self.myListWidget1 by partial
  string?</p>