flask/examples/apishowcase/templates/index.html

{% extends "layout.html" %}
{% block body %}
<p>
  This is an example application that shows how
  the Werkzeug powered Flask microframework works.
<p>
  The various parts of the example application:
<ul>
  <li><a href="{{ url_for('hello_user') }}">Hello World</a>
</ul>
{% endblock %}