List view

layers can be 3D on-disk

topic: io

Status: Open.

Bug

#2430 In scverse/anndata;

· ilan-gold opened on May 8, 2026

Compatibility profiles for writing

topic: compatibility

topic: io

Status: Open.

Enhancement

#2057 In scverse/anndata;

· flying-sheep opened on Jul 29, 2025

Visualise/compare Anndata object structure

topic: exported functions

Status: Open.

Enhancement

#671 In scverse/anndata;

· chris-rands opened on Jan 4, 2022

Allow any unicode incl. / and \ in obsm keys, obs columns, uns keys, …

topic: io

Status: Open.

Enhancement

#2450 In scverse/anndata;

· flying-sheep opened on May 18, 2026

Allow storing heterogeneous lists in .uns (as JSON or so)

backend: hdf5

backend: zarr

topic: io

Status: Open.

Enhancement

#1979 In scverse/anndata;

· jmzhang1911 opened on May 7, 2025

Keep providing a non-nullable string type?

topic: io

type: dataframe 🧮

Status: Open.

Enhancement

#2252 In scverse/anndata;

· flying-sheep opened on Dec 16, 2025

(feat): add async versions of {write,read}_{elem,dispatched}

benchmark

skip-gpu-ci

Status: Draft (not ready).

scverse/anndatanumber 1902

#1902 In scverse/anndata;

· ilan-gold opened on Mar 7, 2025

Add API to move values from X to obs/var/obsm/varm and vice versa

help wanted 🙏

topic: combining

topic: indexing

Status: Open.

Enhancement

#655 In scverse/anndata;

· Zethson opened on Dec 4, 2021

Lazy imports for optional dependencies

performance 🐌

topic: compatibility

Status: Open.

Enhancement

#1122 In scverse/anndata;

· ivirshup opened on Sep 5, 2023

(Semi-)automatic conversion of nullable columns to the appropriate pandas arrays

Status: Open.

Enhancement

#1068 In scverse/anndata;

· grst opened on Jul 23, 2023

Handle new zarr dtypes (both custom and datetime)

Status: Open.

Enhancement

#2238 In scverse/anndata;

· ilan-gold opened on Dec 3, 2025

HTML Repr

help wanted 🙏

Status: Open.

Enhancement

#675 In scverse/anndata;

· ivirshup opened on Jan 11, 2022

feat: allow reading nullable arrays without mask on disk

Status: Draft (not ready).

scverse/anndatanumber 2279

#2279 In scverse/anndata;

· flying-sheep opened on Jan 5, 2026

DataFrame API for obs and var keys via runtime-checkable Protocol

topic: api

type: dataframe 🧮

Status: Open.

Enhancement

#2043 In scverse/anndata;

· ilan-gold opened on Jul 22, 2025

(fix): remove read_elem_partial

skip-gpu-ci

Status: Open (in progress).

scverse/anndatanumber 1895

#1895 In scverse/anndata;

· ilan-gold opened on Mar 7, 2025

i/o of different index types

topic: indexing

topic: io

type: dataframe 🧮

Status: Open.

Enhancement

#2241 In scverse/anndata;

· ilan-gold opened on Dec 8, 2025

Add official testing.anndata API

testing

topic: api

Status: Open.

Enhancement

#1699 In scverse/anndata;

· flying-sheep opened on Sep 26, 2024

ad.merge function

topic: combining

Status: Open.

Enhancement

#658 In scverse/anndata;

· ivirshup opened on Dec 6, 2021

use pyproject-fmt

dev process

Status: Open.

Enhancement

#2337 In scverse/anndata;

· flying-sheep opened on Feb 10, 2026

feat: mlx compat

Status: Draft (not ready).

scverse/anndatanumber 2334

#2334 In scverse/anndata;

· ilan-gold opened on Feb 6, 2026

feat: DataFrame API for custom obs and var

skip-gpu-ci

Status: Draft (not ready).

scverse/anndatanumber 2328

#2328 In scverse/anndata;

· ilan-gold opened on Feb 4, 2026

feat: Add HTML representation

Status: Open (in progress).

scverse/anndatanumber 2236

#2236 In scverse/anndata;

· katosh opened on Nov 29, 2025

Custom to_memory handling compute

type: dask array

Status: Open.

Enhancement

#2185 In scverse/anndata;

· ilan-gold opened on Oct 28, 2025

read_lazy kwarg for not using dask

performance 🐌

topic: backed

topic: cloud ☁️

topic: io

type: dask array

Status: Open.

Enhancement

#2147 In scverse/anndata;

· ilan-gold opened on Oct 9, 2025

Add adapt_vars_like to align .var between AnnData objects (issue #1697)

skip-gpu-ci

Status: Open (in progress).

scverse/anndatanumber 1986

#1986 In scverse/anndata;

· amalia-k510 opened on May 14, 2025