pydata/xarray v2025.06.0 on GitHub

This release brings HTML reprs to the documentation, fixes to flexible Xarray indexes, performance optimizations, more ergonomic seasonal grouping and resampling
with new SeasonGrouper and SeasonResampler objects, and bugfixes.
Thanks to the 33 contributors to this release:
Andrecho, Antoine Gibek, Benoit Bovy, Brian Michell, Christine P. Chai, David Huard, Davis Bennett, Deepak Cherian, Dimitri Papadopoulos Orfanos, Elliott Sales de Andrade, Erik, Erik Månsson, Giacomo Caria, Ilan Gold, Illviljan, Jesse Rusak, Jonathan Neuhauser, Justus Magin, Kai Mühlbauer, Kimoon Han, Konstantin Ntokas, Mark Harfouche, Michael Niklas, Nick Hodgskin, Niko Sirmpilatze, Pascal Bourgault, Scott Henderson, Simon Perkins, Spencer Clark, Tom Vo, Trevor James Smith, joseph nowak and micguerr-bopen

What's Changed

Add xarray-lmfit extension for curve fitting to ecosystem documentation by @kmnhan in #10262
Rename Twitter to X by @star1327p in #10283
Add public typing.py module by @micguerr-bopen in #10215
Adding xarray-eopf to ecosystem.rst by @konstntokas in #10289
Add redirect for contributing guide by @scottyhq in #10282
Add Index.should_add_coord_to_array by @benbovy in #10137
Fix for scalar detection by @huard in #8821
DOC: Remove reference to absolufy-imports from contributing guide by @VeckoTheGecko in #10290
Do not rely on np.broadcast_to to perform trivial dimension insertion by @hmaarrfk in #10277
(fix): remove PandasExtensionArray from repr by @ilan-gold in #10291
Add SeasonGrouper, SeasonResampler by @dcherian in #9524
dev whats-new by @dcherian in #10294
Add back getattr for ExtensionArrays by @dcherian in #10278
(fix): allow upcasting of nans in as_shared_dtype for extension arrays by @ilan-gold in #10292
Fix BinGrouper when labels is not specified by @dcherian in #10295
(fix): numeric arrow dtype deep copies by @ilan-gold in #10315
Fix rolling mean on bool arrays by @gcaria in #10319
Alignment of n-dimensional indexes with partially excluded dims by @benbovy in #10293
FIX: prevent unnecessary type casts in rolling mean by @kmuehlbauer in #10341
Remove "Y" and "M" from DatetimeUnitOptions by @spencerkclark in #10306
fix roundtripping zero-size timedelta arrays by @kmuehlbauer in #10313
Implement literal np.timedelta64 coding by @spencerkclark in #10101
Set .conjugate as alias of .conj, #10302 by @joneuhauser in #10303
Fix setuptools deprecation warnings by @gcaria in #10300
The URL in CONTRIBUTING.md was broken and didn't automatically redirect. by @erik-mansson in #10351
Disallow standard calendar np.datetime64 encoding prior to reform by @spencerkclark in #10352
Docs: User Guide for Complex Numbers by @andrewendlinger in #10235
Avoid copying vectorized indexes by @jder in #10316
apply_ufunc: don't modify attrs on input variables by @erik-mansson in #10330
ruff: default rule set by @DimitriPapadopoulos in #10360
Fix "a array" misspelling by @DimitriPapadopoulos in #10365
Apply assorted ruff/flake8-pytest-style rules (PT) by @DimitriPapadopoulos in #10363
Apply assorted ruff/flake8-simplify rules (SIM) by @DimitriPapadopoulos in #10364
Ignore ruff/Pyflakes rule F401 more precisely by @DimitriPapadopoulos in #10369
Enforce ruff/refurb rules (FURB) by @DimitriPapadopoulos in #10367
Enforce ruff/flake8-implicit-str-concat rules (ISC) by @DimitriPapadopoulos in #10368
(fix): pandas extension array repr for int64[pyarrow] by @ilan-gold in #10317
Apply assorted ruff/Pylint rules (PL) / Enforce PLE rules by @DimitriPapadopoulos in #10366
Enforce ruff/flake8-pyi rules (PYI) by @DimitriPapadopoulos in #10359
Implement cftime vectorization as discussed in PR #8322 by @antscloud in #8324
Fix doc typo for caption "Interoperability" by @tomvothecoder in #10374
use numpy dtype exposed by zarr array instead of metadata.data_type by @d-v-b in #10348
Pin Mypy to 1.15 by @kmuehlbauer in #10378
Improve html repr in dark mode (Jupyterlab + Xarray docs) by @benbovy in #10353
Add missing AbstractWritableDataStore base methods and arguments by @sjperkins in #10343
Enforce ruff/flynt rules (FLY) by @DimitriPapadopoulos in #10375
Docs: Add links to getting help mermaid diagram by @scottyhq in #10324
Grouper tweaks. by @dcherian in #10362
html repr: improve style for dropdown sections by @benbovy in #10354
Fix performance regression in interp from #9881 by @dcherian in #10370
Avoid unsafe casts from float to unsigned int by @QuLogic in #9964
DOC: Update link to Cartopy reference by @star1327p in #10386
Update a link in ROMS_ocean_model.ipynb by @star1327p in #10394
Automatic Dask-Zarr chunk alignment by @josephnowak in #10336
added movement to Xarray related projects by @niksirbi in #10403
Update concat for multi-variable indexes. by @dcherian in #10371
Switch docs to jupyter-execute sphinx extension for HTML reprs by @scottyhq in #10383
Adds chunk key encoding to kwargs passed to zarr by @BrianMichell in #10274
Release v2025.06.0 by @dcherian in #10406

New Contributors

@kmnhan made their first contribution in #10262
@star1327p made their first contribution in #10283
@micguerr-bopen made their first contribution in #10215
@konstntokas made their first contribution in #10289
@joneuhauser made their first contribution in #10303
@erik-mansson made their first contribution in #10351
@jder made their first contribution in #10316
@sjperkins made their first contribution in #10343
@niksirbi made their first contribution in #10403
@BrianMichell made their first contribution in #10274

Full Changelog: v2025.04.0...v2025.06.0