code: def parse_route_attr_filter(route_attr_filter, debug=False):
      
      assert isinstance(route_attr_filter, six.text_type), type(route_attr_filter)
      parser = FilterExprParser(debug)
      return parser.parse(route_attr_filter)
docs: Args:
          route_attr_filter (str): The raw command-line input of the route
              filter.
  
      Returns:
          Tuple[FilterExpr, List[str]]: The second element is a list of errors.