#AnnData
CIRCE is a Python package based on #AnnData and fully compatible with the #scverse environment.

You can extract DNA region modules & visualize CIRCE's interactions over gene locations.

CIRCE also facilitates #CellOracle or #HuMMuS usage, making it unnecessary to run Cicero (code in R) first.

4/5
September 30, 2025 at 12:23 PM
6/
The new .h5sc format provides fast random access to single-cell images for ML training.
It follows #FAIR data principles (findable, accessible, interoperable, reusable) and integrates with @scverse.bsky.social tools via AnnData.
September 24, 2025 at 12:22 PM
New preprint from the @saeyslab.bsky.social by @louisedck.bsky.social --- anndataR brings seamless interoperability between Python’s AnnData (H5AD) and R’s SingleCellExperiment/Seurat — finally bridging the gap between ecosystems. biorxiv.org/content/10.1101/2025.08.18.669052v1
September 17, 2025 at 6:49 AM
anndataR makes it possible to:
- Read and write H5AD files natively in R
- Convert between AnnData, SingleCellExperiment & Seurat
- Work with AnnData objects in R

If you've struggled with reading H5AD files in R, or single cell format conversion, try out anndataR! anndatar.data-intuitive.com
www.biorxiv.org
August 25, 2025 at 3:24 PM
We're excited to share that our preprint on anndataR, a new package bringing Python's AnnData to R, is now available on bioRxiv 🎉

🔗 Read the paper: www.biorxiv.org/content/10.1...
💻 Check the package in action: anndatar.data-intuitive.com
August 25, 2025 at 3:24 PM
We also now have a new way of extending the anndata API, contributed by a community member, Sri Varra. Users can now extend the anndata API easily, great for building new features and methods directly into the AnnData object: anndata.readthedocs.io/en/stable/ge...
August 11, 2025 at 4:51 PM
Anndata now supports @zarr.dev v3, great for both performance and interoperability. Check out our guide for more info, especially sharding: anndata.readthedocs.io/en/stable/tu.... Don’t worry though, we remain fully v2 backwards compatible - upgrade fearlessly!
August 11, 2025 at 4:51 PM
anndata 0.12 is out now! We have lots of great features that we hope address some persistent needs. Here are some of the highlights!
August 11, 2025 at 4:51 PM
At least you can access the h5 file and find a matrix, though. I agree that getting all AnnData functionality in R is hard (and changes based on which version of scanpy your file was created in), but it's a format you can manually inspect with something like rhdf5 rather than a binary file.
July 25, 2025 at 11:51 AM
h5ad/AnnData have similar problems with how its implemented in Python. it's not really language agnostic.
July 25, 2025 at 11:45 AM
Annotated matrices are much more valuable!

AnnData can easily be read into R/Bioc as well unlocking more stats tools.
July 25, 2025 at 7:33 AM
(2/2) ...omic data augmentation methods, interoperability with e.g., Anndata and PyTorch, cross-release benchmarks, roadmap of development practices, enriched tutorials for non-microbiome omics.
July 17, 2025 at 8:20 PM
We will have our next community meeting on Tuesday, 2025-07-08 at 18:00 CEST! Ilan will be speaking about the new upcoming anndata release.
(Zoom registration link and more information in thread!)
July 7, 2025 at 7:01 AM
We will have our next community meeting on Tuesday, 2025-07-08 at 18:00 CEST! Ilan will be speaking about the new upcoming anndata release.
(Zoom registration link and more information in thread!)
July 3, 2025 at 7:01 AM
and many are hampered by slow random disk access. We present scDataset, a PyTorch IterableDataset that operates directly on one or more AnnData files without the need for format conversion. The core innovation is a combination of block sampling and [3/5 of https://arxiv.org/abs/2506.01883v1]
June 3, 2025 at 6:54 AM
the AnnData format is the community standard for storing single-cell datasets, existing data loading solutions for AnnData are often inadequate: some require loading all data into memory, others convert to dense formats that increase storage demands, [2/5 of https://arxiv.org/abs/2506.01883v1]
June 3, 2025 at 6:54 AM
We’ve designed it to be fast, flexible and easy to use:
- Works seamlessly with Scanpy, Squidpy and AnnData (@scverse_team compatible)
- Plug-and-play any ST dataset
- Outputs spatially informed scores
- Geostatistics-inspired metrics to evaluate gene sets
June 2, 2025 at 11:23 AM
Updates on CRAN: anndata (0.8.0), effectsize (1.0.1), FlowerMate (1.1)
May 27, 2025 at 5:23 PM
CRAN updates: anndata FlowerMate #rstats
May 27, 2025 at 3:02 PM
Working with a large set of AnnData files on S3 is tough if you don't have the metadata indexed, so I created a tool to help.

github.com/honicky/annd...

It uses partial downloads to dramatically speed up extracting the metadata without downloading the whole file.

`pip install anndata-metadata`
GitHub - honicky/anndata-metadata: A Python library and CLI tool for extracting metadata from AnnData .h5ad files, both locally and on S3
A Python library and CLI tool for extracting metadata from AnnData .h5ad files, both locally and on S3 - honicky/anndata-metadata
github.com
May 18, 2025 at 9:22 PM
scverse turns 3!
What started as a shared vision for interoperable single-cell analysis has become a vibrant, global community.
From AnnData to full multimodal pipelines, we’re building the future of everything single-cell and spatial omics, together.
Here’s to what’s next!
May 17, 2025 at 10:08 PM
Happy to share my first publication! AnnSQL leverages DuckDB to create a relational database based on each AnnData layer, enabling fast queries on massive, atlas-sized single-cell datasets. 🧬🖥️

#Bioinformatics #SingleCell #DuckDb
🔍 Recently published in Bioinformatics Advances: "AnnSQL: A Python SQL-based package for fast large-scale single-cell genomics analysis using minimal computational resources"

Read the full paper here: https://doi.org/10.1093/bioadv/vbaf105

Authors: @kennypavan.com and @your-arpy.bsky.social
May 6, 2025 at 2:20 PM
AnnSQL bridges single-cell #genomics and relational databases by converting AnnData objects into SQL tables using the DuckDb engine. This enables fast, SQL-based analysis of datasets with millions of cells while preserving key functionality like normalization, PCA, and clustering.
May 6, 2025 at 9:10 AM
It integrates with spatialdata and anndata, helping extend scverse toward spatial proteomics and imaging workflows.

We hope it helps researchers build flexible, powerful analysis pipelines for analyzing highly multiplexed fluorescence images.

🔧 Package: github.com/sagar87/spat...
GitHub - sagar87/spatialproteomics: Spatialproteomics is a light weight wrapper around xarray with the intention to facilitate the data exploration and analysis of highly multiplexed immunohistochemistry data. Docs available here: https://sagar87.github.io/spatialproteomics/ .
Spatialproteomics is a light weight wrapper around xarray with the intention to facilitate the data exploration and analysis of highly multiplexed immunohistochemistry data. Docs available here: h...
github.com
May 5, 2025 at 11:30 AM
Hey Jeff! So nice to e-connect with u. I converted the seurat obj to anndata. Will use SEACells to summarize the whole dataset with ~9k metacells, happy to share once I finish! Think this ll make your beautiful data easier to query for any tasks that would be too intense using 500k cells. Thank you!
April 29, 2025 at 11:33 PM