def open_store(self):
service = self._traj.v_storage_service<EOL>if service.is_open:<EOL><INDENT>raise RuntimeError('<STR_LIT>')<EOL><DEDENT>service.store(pypetconstants.OPEN_FILE, None,<EOL>trajectory_name=self._traj.v_name)<EOL>
Opens store manually not needed if used with `with`