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Update zarr requirement from <3 to <4 #3775

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Updates the requirements on zarr to permit the latest version.

Release notes

Sourced from zarr's releases.

v3.1.1

See release notes https://zarr.readthedocs.io/en/stable/release-notes.html

What's Changed

New Contributors

Full Changelog: zarr-developers/zarr-python@v3.1.0...v3.1.1

Changelog

Sourced from zarr's changelog.

3.1.1 (2025-07-28)

Features


- Add lightweight implementations of .getsize() and .getsize_prefix() for ObjectStore. (:issue:`3227`)

Bugfixes

  • Creating a Zarr format 2 array with the order keyword argument no longer raises a warning. (:issue:3112)
  • Fixed the error message when passing both config and write_empty_chunks arguments to reflect the current behaviour (write_empty_chunks takes precedence). (:issue:3112)
  • Creating a Zarr format 3 array with the order argument now conistently ignores this argument and raises a warning. (:issue:3112)
  • When using from_array to copy a Zarr format 2 array to a Zarr format 3 array, if the memory order of the input array is "F" a warning is raised and the order ignored. This is because Zarr format 3 arrays are always stored in "C" order. (:issue:3112)
  • The config argument to zarr.create (and functions that create arrays) is now used - previously it had no effect. (:issue:3112)
  • Ensure that all abstract methods of ZDType raise a NotImplementedError when invoked. (:issue:3251)
  • Register 'gpu' marker with pytest for downstream StoreTests. (:issue:3258)
  • Expand the range of types accepted by parse_data_type to include strings and Sequences.
  • Move the functionality of parse_data_type to a new function called parse_dtype. This change ensures that nomenclature is consistent across the codebase. parse_data_type remains, so this change is not breaking. (:issue:3264)
  • Fix a regression introduced in 3.1.0 that prevented inf, -inf, and nan values from being stored in attributes. (:issue:3280)
  • Fixes Group.nmembers() ignoring depth when using consolidated metadata. (:issue:3287)

Improved Documentation


- Expand the data type docs to include a demonstration of the ``parse_data_type`` function.
  Expand the docstring for the ``parse_data_type`` function. (:issue:`3249`)
- Add a section on codecs to the migration guide. (:issue:`3273`)

Misc



- :issue:`3268`

3.1.0 (2025-07-14)


Features




    

  • Ensure that invocations of create_array use consistent keyword arguments, with consistent defaults.
    • 



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@dependabot
Update zarr requirement from <3 to <4
9384bb8 
Updates the requirements on [zarr](https://github.com/zarr-developers/zarr-python) to permit the latest version.
- [Release notes](https://github.com/zarr-developers/zarr-python/releases)
- [Changelog](https://github.com/zarr-developers/zarr-python/blob/main/docs/release-notes.rst)
- [Commits](zarr-developers/zarr-python@v0.0.0...v3.1.1)

---
updated-dependencies:
- dependency-name: zarr
  dependency-version: 3.1.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
@dependabot dependabot bot added dependencies Pull requests that update a dependency file python Pull requests that update python code labels Aug 25, 2025
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