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Use the Django template macros plugin:
https://gist.github.com/1715202 (django >= 1.4)
or
http://www.djangosnippets.org/snippets/363/ (django < 1.4)
# base.html
{% kwacro title %}
{% block title %}My Cool Website{% endblock %}
{% endkwacro %}
<html>
<head>
<title>{% usekwacro title %}</title>
</head>
<body>
<h1>{% usekwacro title %}</h1>
</body>
</html>
and
# blog.html
{% extends 'base.html' %}
{% block title %}My Blog{% endblock %}
# base.html
{% macro title %}
{% block title %}My Cool Website{% endblock %}
{% endmacro %}
<html>
<head>
<title>{% usemacro title %}</title>
</head>
<body>
<h1>{% usemacro title %}</h1>
</body>
</html>
and
# blog.html
{% extends 'base.html' %}
{% block title %}My Blog{% endblock %}
I think that use of the context processor is in this case an overkill. You can easily do this:
#base.html
<html>
<head>
<title>{% block title %}My Cool Website{% endblock %}</title>
</head>
<body>
{% block content %}{% endblock %}
</body>
</html>
and then:
# blog.html
{% extends 'base.html' %}
{% block content %}
<h1>{% block title %}My Blog{% endblock %}</h1>
Lorem ipsum here...
{% endblock %}
and so on... Looks like DRY-compatible.
You probably don't actually want to use a block but rather to just use a variable:
# base.html
<html>
<head>
<title>{{ title|default:"My Cool Website" }}</title>
</head>
<body>
<h1>{{ title|default:"My Cool Website" }}</h1>
</body>
</html>
You then set the title through the context.
Here's a way I discovered when trying to do the same thing myself:
# base_helper.html
<html>
<head>
<title>{% block _title1 %}{% endblock %}</title>
</head>
<body>
<h1>{% block _title2 %}{% endblock %}</h1>
</body>
</html>
# base.html
{% extends "base_helper.html" %}
# Copy title into _title1 & _title2, using "My Cool Website" as a default.
{% block _title1 %}{% block _title2 %}{% block title %}My Cool Website{% endblock %}{% endblock %}{% endblock %}
Requires an extra file unfortunately, but doesn't require you to pass the title from the view.
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