gzip still imports the oldnumcodecs.zarr3 implementation (see the issue:numcodecs.gzip is not configured in the config #3458 for more details)
The example at the top ofzarr.codecs.numcodecs._codecs throws an error when run:module 'zarr.codecs.numcodecs' has no attribute 'zarr3'

TODO:

Add unit tests and/or doctests in docstrings
Add docstrings and API docs for any new/modified user-facing classes and functions
New/modified features documented indocs/user-guide/*.rst
Changes documented as a new file inchanges/
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K-Meech added2 commits

September 15, 2025 15:10

fix gzip typo

147b9e0

fix failing example at top of zarr-codecs-numcodecs

6e605eb

github-actionsbot added the needs release notesAutomatically applied to PRs which haven't added release notes label

Sep 15, 2025

d-v-b approved these changes

Sep 15, 2025

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d-v-b commentedSep 15, 2025

yay!

K-Meech mentioned this pull request

Sep 15, 2025

numcodecs.gzip is not configured in the config#3458

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d-v-b commentedSep 15, 2025

i think we can skip the release notes here

fix failing tests

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@d-v-b I've fixed the failing tests locally, but there's still a failure in the CI (only for python=3.11 / np=1.26 env). It seems to be from an un-related test functiontests/test_sync.py::test_sync_timeout. Any idea what the issue is here?

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d-v-b commentedSep 15, 2025

@d-v-b I've fixed the failing tests locally, but there's still a failure in the CI (only for python=3.11 / np=1.26 env). It seems to be from an un-related test functiontests/test_sync.py::test_sync_timeout. Any idea what the issue is here?

that's a flaky test that depends on the runtime of a function. it usually works if you trigger a re-run, but we can also ignore the failure