def app_iter_range(self, start, stop):
        if start or start == 0:
            self._fp.seek(start)
        if stop is not None:
            length = stop - start
        else:
            length = None
        try:
            for chunk in self:
                if length is not None:
                    length -= len(chunk)
                    if length < 0:
                        # Chop off the extra:
                        yield chunk[:length]
                        break
                yield chunk
        finally:
            if not self._suppress_file_closing:
                self.close()
dataset/ETHPy150Open openstack/swift/swift/obj/mem_diskfile.py/DiskFileReader.app_iter_range/original