def is_derived_from(self, fromclause):
        if self._cloned_set in fromclause:
            return True
        return self.element.is_derived_from(fromclause)
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/sql/selectable.py/Alias.is_derived_from/swapped operands of `in`