# Blog post: Xarray Indexes

**URL:** <https://discourse.pangeo.io/t/blog-post-xarray-indexes/5404>\
**Category:** News & Announcements\
**Created:** [September 23, 2025, 1:52pm UTC](https://discourse.pangeo.io/t/blog-post-xarray-indexes/5404 "2025-09-23T13:52:50Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![benbovy](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pangeo.io/benbovy/32/592_2.png) [@benbovy](https://discourse.pangeo.io/u/benbovy)\
**Post date:** [September 23, 2025, 1:52pm UTC](https://discourse.pangeo.io/t/blog-post-xarray-indexes/5404/1 "2025-09-23T13:52:50Z")

</div>

Together with @scottyhq , @dcherian and @keewis we published a few weeks ago a blog post on Xarray [“Flexible Indexes: Exciting new ways to slice and dice your data!”](https://xarray.dev/blog/flexible-indexing).

**TL;DR** : After gradually refactoring Xarray internals over the last few years, flexible indexes are now alive and ready to use, finally! Xarray indexes make coordinate-based data selection and alignment customizable, enabling efficient handling of both traditional and more exotic data structures. In the blog post we highlight a few examples that take advantage of this new superpower!

The blog post comes also with a [Gallery of Custom Index Examples](https://xarray-indexes.readthedocs.io/) as well as @dcherian ‘s great presentation at SciPy 2025 ([video recording](https://www.youtube.com/watch?v=I-NHCuLhRjY)).

Other technical blog posts should follow up, focusing on how to create a custom index (i.e., describing how the Xarray Index API interacts with Xarray internals for a common set of operations like indexing and alignment).

Feedback welcome!

---

<div class="post-metadata">

**Author:** ![dcherian](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pangeo.io/dcherian/32/2235_2.png) [@dcherian](https://discourse.pangeo.io/u/dcherian)\
**Post date:** [September 23, 2025, 2:24pm UTC](https://discourse.pangeo.io/t/blog-post-xarray-indexes/5404/2 "2025-09-23T14:24:14Z")

</div>

Truly amazing work @benbovy!