def _fetchmany_impl(self, size=None):
        try:
            if size is None:
                return self.cursor.fetchmany()
            else:
                return self.cursor.fetchmany(size)
        except __HOLE__:
            self._non_result()
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/engine/result.py/ResultProxy._fetchmany_impl