#base.html
<html>
<head><title>{% block title %}Title{% endblock %}</title>
</head>
<body>
{% block body_content %}
{% include "2col.html" %}
{% endblock body_content %}
</body>
</html>
#2col.html
<div id="container">{% block content %}test content{% endblock %}</div>
<div id="sidebar">{% block sidebar %}test sidebar{% endblock %}</div>
#index.html
{% extends "base.html" %}
{% block content %} SUXX {% endblock content %}
{% block sidebar %} SUXX TO{% endblock sidebar %}
<html>
<head>
<title>Title</title>
</head>
<body>
<div id="container">test content</div>
<div id="sidebar">test sidebar</div>
</body>
</html>
{% block content %} SUXX {% endblock content %}
{% block sidebar %} SUXX TO{% endblock sidebar %}
Что не так, или использование block тут не предусмотрено