Panpipes ingest errros in writing out a concatenated MuData object when hashing abs are present in the prot modailty

[deevdevil88]

Panpipes ingest is erroring on the concat_adata.py step, when hashing_ab are present in the prot modality. The error is specifically in writng out the MuData object, after a hashin_ab mod is created. The error is a type erorr for converting non-string objects to strings for one of the columns in the hasing_ab var slot. please see the attached screen shot
. in the current case panpipes was installed in a python 3.10 venv. But this error has also been reproduced in a panpipes conda env.

[deevdevil88]

Current work around is to comment out line 224 in concat_adata.py to not write out a seperate hashing_ab modailty until i figure out how to fix the type erorr. This is in branch devika_interim.

[bio-la]

thanks, i'll merge the PR but keep this issue open. if you can create the same object in an interactive session you can check which column of the hashing array is creating problems. my guess is that the .var array has the hashing names and the count values in different columns and the names should be converted to categorical before adding them as var.
if you get round it (or have an example dataset i can use to test) we will put a fix in the next version.