code: def is_form_media_type(media_type):
      
      base_media_type, params = parse_header(media_type.encode(HTTP_HEADER_ENCODING))
      return (base_media_type == 'application/x-www-form-urlencoded' or
              base_media_type == 'multipart/form-data')
docs: Return True if the media type is a valid form media type.