code: def slugify(value):
      
      # TODO(Jim Zhan) whether to use jinja2???
      value = Markup(value).striptags()
      if type(value) == unicode:
          value = unicode(unidecode(value))
          value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore')
      value = unicode(re.sub('[^\w\s-]', '', value).strip().lower())
      return re.sub('[-\s]+', '-', value)
docs: Normalizes string, converts to lowercase, removes non-alpha characters,
      and converts spaces to hyphens.
  
      Took from django sources.