関連ワード:  nonetype is not iterable python    nonetype object is not iterable python    nonetype object is not iterable python error    python nonetype object is not iterable    nonetype object is not iterable python list    nonetype object is not iterable python sql    argument of nonetype is not iterable python    typeerror nonetype object is not iterable python    argument of type nonetype is not iterable python    typeerror argument of type nonetype is not iterable python