Triger AttributeError "X not found" when use layer parameter in mu.tl.embedding

[liuzj039]

Describe the bug
Triger AttributeError "X not found" when use layer parameter in mu.tl.embedding.

To Reproduce
mu.pl.embedding( md, "X_umap", color=[*some gene*], cmap="Reds", layer="sct_corrected", )

then a attribute error was triggered

---

AttributeError Traceback (most recent call last)

~/softwares/anaconda3/lib/python3.8/site-packages/muon/_core/plot.py in embedding(data, basis, color, use_raw, layer, >**kwargs)
120 if layer is not None:
121 if layer in data.mod[m].layers:
--> 122 fmod_adata.X = data.mod[m][:, mod_keys].layers[layer].X
123 if use_raw:
124 warnings.warn(f"Layer='{layer}' superseded use_raw={use_raw}")

~/softwares/anaconda3/lib/python3.8/site-packages/scipy/sparse/base.py in getattr(self, attr)
685 return self.getnnz()
686 else:
--> 687 raise AttributeError(attr + " not found")
688
689 def transpose(self, axes=None, copy=False):

AttributeError: X not found

Additional context
This error appears to be caused by a typo. In fact a simple deletion of the .X will fix this bug.https://github.com/PMBio/muon/blob/e77bbf3a2acb1c92dae4c13419cd7335602c2735/muon/_core/plot.py#L122

Thanks developers for providing such a great tool.

[liuzj039]

It is also a typo in mudata.py https://github.com/PMBio/muon/blob/e77bbf3a2acb1c92dae4c13419cd7335602c2735/muon/_core/mudata.py#L786

[ilia-kats]

This should be fixed in master, could you test it and report back?

[liuzj039]

Muon is also working well in my environment now.
Thank you for your quick reply！