AnnData cannot be row-sliced after tl.diffmap

[hjp34]

I want to split AnnData after tl.diffmap according to each cell's library. But it appears that row-slicing AnnData after diffmap, dpt, or louvain gives the error message AttributeError: 'AnnData' object has no attribute '_n_obs'. But AnnData.X and AnnData.obs can be sliced. Could you please give me advice?

>>> adata = sc.read_10x_h5('filtered_gene_bc_matrices_h5.h5', 'mm10')
>>> scanpy.api.tl.diffmap(adata)
>>> adata_diffmap[:, 0]
View of AnnData object with n_obs × n_vars = 5000 × 1
>>> adata_diffmap[0, :] 
AttributeError: 'AnnData' object has no attribute '_n_obs'

[falexwolf]

Sorry about this bug in AnnData views, which have only recently been introduced. Is fixed in anndata 0.4.4 pip install anndata --upgrade and on the master branch: scverse/anndata@ba9b3ee.