(v0.10.4)=
### 0.10.4 {small}`2024-01-04`
#### Bug fixes
* Only try to use `Categorical.map(na_action=…)` in actually supported Pandas ≥2.1 {pr}`1226` {user}`flying-sheep`
* `AnnData.__sizeof__()` support for backed datasets {pr}`1230` {user}`Neah-Ko`
* `adata[:, []]` now returns an `AnnData` object empty on the appropriate dimensions instead of erroring {pr}`1243` {user}`ilan-gold`
* `adata.X[mask]` works in newer `numpy` versions when `X` is `backed` {pr}`1255` {user}`ilan-gold`
* `adata.X[...]` fixed for `X` as a `BaseCompressedSparseDataset` with `zarr` backend {pr}`1265` {user}`ilan-gold`
* Improve read/write error reporting {pr}`1273` {user}`flying-sheep`
#### Documentation
* Improve aligned mapping error messages {pr}`1252` {user}`flying-sheep`
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