code: def prune_missing(table):
      
      try:
          for item in table.select():
              if not os.path.isfile(item.file_path):
                  logger.info("File disappeared: %s", item.file_path)
                  item.delete()
      except:  # pylint:disable=bare-except
          logger.exception("Error pruning %s", table)
docs: Prune any files which are missing from the specified table