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Merged
merged 4 commits into from
Jan 31, 2025
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release notes: 2025.01.2 #10007

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43ce1ca
finalize release notes
kmuehlbauer Jan 30, 2025
35bf232
add contributors
kmuehlbauer Jan 30, 2025
4ba0538
Merge branch 'main' into rel-2025.1.2
kmuehlbauer Jan 30, 2025
be57bae
Tweak main what's new entry for time coding (#4)
spencerkclark Jan 31, 2025
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32 changes: 17 additions & 15 deletions doc/whats-new.rst
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Expand Up @@ -16,14 +16,21 @@ What's New

.. _whats-new.2025.01.2:

v2025.01.2 (unreleased)
-----------------------
v2025.01.2 (Jan 31, 2025)
-------------------------

This release brings non-nanosecond datetime and timedelta resolution to xarray,
sharded reading in zarr, suggestion of correct names when trying to access
non-existent data variables and bug fixes!

This release brings non-nanosecond datetime and timedelta resolution to xarray.
In the last couple of releases xarray has been prepared for that change. The
code had to be changed and adapted in numerous places, affecting especially the
test suite. The documentation has been updated accordingly and a new internal
chapter on :ref:`internals.timecoding` has been added.
Thanks to the 16 contributors to this release:
Deepak Cherian, Elliott Sales de Andrade, Jacob Prince-Bieker, Jimmy Westling, Joe Hamman, Joseph Nowak, Justus Magin, Kai Mühlbauer, Mattia Almansi, Michael Niklas, Roelof Rietbroek, Salaheddine EL FARISSI, Sam Levang, Spencer Clark, Stephan Hoyer and Tom Nicholas

In the last couple of releases xarray has been prepared for allowing
non-nanosecond datetime and timedelta resolution. The code had to be changed
and adapted in numerous places, affecting especially the test suite. The
documentation has been updated accordingly and a new internal chapter
on :ref:`internals.timecoding` has been added.

To make the transition as smooth as possible this is designed to be fully
backwards compatible, keeping the current default of ``'ns'`` resolution on
Expand Down Expand Up @@ -76,12 +83,9 @@ New Features
:py:class:`pandas.DatetimeIndex` (:pull:`9965`). By `Spencer Clark
<https://github.com/spencerkclark>`_ and `Kai Mühlbauer
<https://github.com/kmuehlbauer>`_.
- :py:meth:`DatasetGroupBy.first` and :py:meth:`DatasetGroupBy.last` can now use ``flox`` if available. (:issue:`9647`)
By `Deepak Cherian <https://github.com/dcherian>`_.

Breaking changes
~~~~~~~~~~~~~~~~

- Adds shards to the list of valid_encodings in the zarr backend, so that
sharded Zarr V3s can be written (:issue:`9947`, :pull:`9948`).
By `Jacob Prince_Bieker <https://github.com/jacobbieker>`_

Deprecations
~~~~~~~~~~~~
Expand All @@ -92,10 +96,8 @@ Deprecations
data (:issue:`1621`, :pull:`9966`). By `Spencer Clark
<https://github.com/spencerkclark>`_.


Bug fixes
~~~~~~~~~

- Fix :py:meth:`DataArray.ffill`, :py:meth:`DataArray.bfill`, :py:meth:`Dataset.ffill` and :py:meth:`Dataset.bfill` when the limit is bigger than the chunksize (:issue:`9939`).
By `Joseph Nowak <https://github.com/josephnowak>`_.
- Fix issues related to Pandas v3 ("us" vs. "ns" for python datetime, copy on write) and handling of 0d-numpy arrays in datetime/timedelta decoding (:pull:`9953`).
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