code: def uservoice(parser, token):
      
      bits = token.split_contents()
      if len(bits) > 1:
          raise TemplateSyntaxError("'%s' takes no arguments" % bits[0])
      return UserVoiceNode()
docs: UserVoice tracking template tag.
  
      Renders Javascript code to track page visits.  You must supply
      your UserVoice Widget Key in the ``USERVOICE_WIDGET_KEY``
      setting or the ``uservoice_widget_key`` template context variable.