Altana Namsaraeva

See https://github.com/theislab/pertpy-datasets/... for current status of the issue. The objects are too large to be uploaded now.

 When moving non-numerical and numerical columns (e.g. ['age', 'gender_num'] for MIMIC-II dataset) from X to obs and backwards.

Thank you for this PR, I am using it right now. One question: would it be possible to pass a list of strings onto `write_element()` instead of just one element?...

I have the same problem with an image that I plotted a couple of months ago, rolling back to 0.2.11 helped. I used to have: Now I have this by...