code: def set_index(self, index):
          
          item = index.internalPointer()
          note = item.internal_data()
          self.content_lb.setText(note.content)
          self.created_dte.setDateTime(dt_to_qdatetime(note.date_created))
          self.updated_dte.setDateTime(dt_to_qdatetime(note.date_updated))
          self.username_lb.setText(note.user.username)
docs: Display the data of the given index
  
          :param index: the index to paint
          :type index: QtCore.QModelIndex
          :returns: None
          :rtype: None
          :raises: None