gistfile1.py

def escape_text(self, text):
    """Use html5lib to escape evil html tags."""
        
    parser = html5lib.HTMLParser(tokenizer=HTMLSanitizer)
    walker = html5lib.treewalkers.getTreeWalker('etree')
    stream = walker(parser.parseFragment(text))
    serializer = HTMLSerializer(quote_attr_values=True, omit_optional_tags=False,
                                    alphabetical_attributes=True)
                                    
    return serializer.render(stream)