code: def __get_boxes(self):
          
          boxfile = self.__box_path
  
          try:
              box_builder = pyocr.builders.LineBoxBuilder()
              with self.fs.open(boxfile, 'r') as file_desc:
                  boxes = box_builder.read_file(file_desc)
              if boxes != []:
                  return boxes
              # fallback: old format: word boxes
              # shouldn't be used anymore ...
              box_builder = pyocr.builders.WordBoxBuilder()
              with self.fs.open(boxfile, 'r') as file_desc:
                  boxes = box_builder.read_file(file_desc)
              if len(boxes) <= 0:
                  return []
              logger.warning("WARNING: Doc %s uses old box format" %
                             (str(self.doc)))
              return [pyocr.builders.LineBox(boxes, boxes[0].position)]
          except IOError as exc:
              logger.error("Unable to get boxes for '%s': %s"
                           % (self.doc.docid, exc))
              return []
docs: Get all the word boxes of this page.