Sample Cactus template tags support

extras_templatetags.py

from django import template
from django.utils.safestring import mark_safe
from django.utils.encoding import force_unicode

# pip install markdown
from markdown import markdown

register = template.Library()

class MarkdownNode(template.Node):
    def __init__(self, nodelist):
        self.nodelist = nodelist

    def render(self, context):
        value = self.nodelist.render(context)
        try:
            return mark_safe(markdown(value))
        except ImportError:
            return force_unicode(value)


@register.tag(name="markdown")
def markdown_tag(parser, token):
    nodelist = parser.parse(("endmarkdown",))
    parser.delete_first_token()

    return MarkdownNode(nodelist)

pages_index.html

{% extends "base.html" %}
{% block content %}
{% markdown %}
# Welcome to Cactus!

Taken from [Markdown Cheat Sheet](http://warpedvisions.org/projects/markdown-cheat-sheet/).

# Header 1 #
## Header 2 ##
### Header 3 ###
#### Header 4 ####
##### Header 5 #####

[Link back to H2](#id-goes-here)

This is a paragraph, which is text surrounded by whitespace. Paragraphs can be on one
line (or many), and can drone on for hours.

Here is a Markdown link to [Warped](http://warpedvisions.org), and a literal .
Now some SimpleLinks, like one to [google] (automagically links to are-you-
feeling-lucky), a [wiki: test] link to a Wikipedia page, and a link to
[foldoc: CPU]s at foldoc.

Now some inline markup like _italics_,  **bold**, and `code()`. Note that underscores in
words are ignored in Markdown Extra.

![picture alt](/images/photo.jpeg "Title is optional")

> Blockquotes are like quoted text in email replies
>> And, they can be nested

* Bullet lists are easy too
- Another one
+ Another one

1. A numbered list
2. Which is numbered
3. With periods and a space

And now some code:

    // Code is just text indented a bit
    which(is_easy) to_remember();

Text with
two trailing spaces
(on the right)
can be used
for things like poems

### Horizontal rules
--------------------------


<div class="custom-class" markdown="1">
This is a div wrapping some Markdown plus.  Without the DIV attribute, it ignores the
block.
</div>

{% endmarkdown %}
{% endblock %}