Update multi.py

[zky001]

fix bugs be metioned on issue #35301

• closes #xxxx
• tests added / passed
• passes black pandas
• passes git diff upstream/master -u -- "*.py" | flake8 --diff
• whatsnew entry

[arw2019]

We need a test for this

Also - are you sure this is enough to fix the original problem? I tried this quickly and it seems like the error persists

[arw2019]

Cool, I think that does fix the original issue!

Unfortunately as is it seems to break some of the other tests so that's something to look into (in particular a few go wrong in pandas/tests/multi/test_indexing.py)

[zky001]

We need a test for this

Also - are you sure this is enough to fix the original problem? I tried this quickly and it seems like the error persists

Cool, I think that does fix the original issue!

Unfortunately as is it seems to break some of the other tests so that's something to look into (in particular a few go wrong in pandas/tests/multi/test_indexing.py)

thanks , I will fix that

[zky001]

shall I close this pr? xs is intended for scalar lookups

[jreback]

as indicted in the issue would take a better error message
add a test from the OP