My custom reStructuredText rendering tag for my blog

rst.py

from django import template
from django.utils.encoding import smart_str, force_unicode
from django.utils.safestring import mark_safe
import docutils.nodes
from docutils.core import publish_parts
from docutils.writers import html4css1

register = template.Library()

def restructuredtext(value):
    parts = publish_parts(
        source = smart_str(value), 
        writer = HTMLWriter(),
        settings_overrides = {
            'initial_header_level': 3,
            'footnote_references': 'superscript',
        }
    )
    return mark_safe(force_unicode(parts['fragment']))

class HTMLWriter(html4css1.Writer):
    def __init__(self):
        html4css1.Writer.__init__(self)
        self.translator_class = HTMLTranslator

class HTMLTranslator(html4css1.HTMLTranslator):
    #
    # Remove the stupid "border=1" default on tables.
    #
    def visit_table(self, node):
        self.body.append(self.starttag(node, 'table', CLASS='docutils'))
    
    #
    # Prevent <h3> from becoming <h3><a id=...>
    #
    def visit_title(self, node, move_ids=1):
        if isinstance(node.parent, docutils.nodes.Admonition):
            self.body.append(self.starttag(node, 'p', '', CLASS='admonition-title'))
            self.context.append("</p>\n")
        else:
            html4css1.HTMLTranslator.visit_title(self, node)
    
    #
    # Avoid doing <blockquote><ul>...
    # Adapted from http://thread.gmane.org/gmane.text.docutils.user/742/focus=804
    #
    _suppress_blockquote_child_nodes = (docutils.nodes.bullet_list,
                                        docutils.nodes.enumerated_list,
                                        docutils.nodes.definition_list, 
                                        docutils.nodes.literal_block,
                                        docutils.nodes.doctest_block,
                                        docutils.nodes.line_block,
                                        docutils.nodes.table)
        
    def visit_block_quote(self, node):
        if len(node.children) != 1 or not isinstance(node.children[0], self._suppress_blockquote_child_nodes):
            html4css1.HTMLTranslator.visit_block_quote(self, node)

    def depart_block_quote(self, node):
        if len(node.children) != 1 or not isinstance(node.children[0], self._suppress_blockquote_child_nodes):
            html4css1.HTMLTranslator.depart_block_quote(self, node)

    #
    # Avoid using reserved words in section titles
    #
    def visit_section(self, node):
        node['ids'] = ['s-' + i for i in node.get('ids', [])]
        html4css1.HTMLTranslator.visit_section(self, node)
    

restructuredtext.is_safe = True
register.filter(restructuredtext)