title: How do I get index from clicked row?
body: <p>I'm using a TreeView widget, and I'd like to have an index for the currently clicked row. So far I have something like this:</p>
  <pre class="lang-py prettyprint-override"><code>    self.tree_view_test.bind('&lt;ButtonRelease-1&gt;', self.selectItem)
  
      def selectItem(self):
          item = self.tree_view_test.selection()[0]
          print(item)
  </code></pre>
  <p>But I receiving something like: <code>I003</code>, <code>I004</code> etc. Do I have to convert it to integer on my own, or there is some better approach for it?</p>