add linter to Python demo

Author: breandan

python.html

@@ -65,6 +65,7 @@ <h1><img style="display: inline;" src="/pluginIcon.svg" width="26">&nbsp;&nbsp;T
 <!--    <input type="checkbox" id="ntstubs-checkbox" checked>-->
 </div>
 <script type="text/javascript">var PROGRAMMING_LANG = "python"</script>
+<script src="https://cdn.jsdelivr.net/pyodide/v0.27.2/full/pyodide.js"></script>
 <script src="tidyparse-web.js"></script>
 </body>
 </html>