Can't implicitly convert non-string objects to strings. Bug about tl.filter_rank_genes_groups and tl.rank_genes_groups

[christophechu]

Please make sure these conditions are met

• [X] I have checked that this issue has not already been reported.
• [X] I have confirmed this bug exists on the latest version of scanpy.
• [X] (optional) I have confirmed this bug exists on the master branch of scanpy.

What happened?

When I use sc.tl.filter_rank_genes_groups or sc.tl.filter_rank_genes_groups, I can not write the result file until I delete the output files stored as adata.uns['rank_genes_groups_filtered'] and adata.uns['rank_genes_groups']

Minimal code sample

sc.tl.filter_rank_genes_groups
sc.tl.filter_rank_genes_groups
Both default use

Error output

TypeError: Can't implicitly convert non-string objects to strings

Above error raised while writing key 'names' of <class 'h5py._hl.group.Group'> to /

Versions

anndata: 0.9.2 scanpy version: 1.9.5

[kcArtemis]

Hey @christophechu , can you please elaborate your concerns? Exactly, what were you trying to do ??