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Add nodask constraint for test-py314-no-dask environment #11385

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Add nodask constraint for test-py314-no-dask environment #11385

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4709532
Add nodask constraint for test-py313-no-dask environment
weiji14 Jun 14, 2026
183128a
Remove iris from feature.extras.dependencies because it depends on dask
weiji14 Jun 14, 2026
a1efeaf
Merge branch 'main' into env/nodask
keewis Jun 18, 2026
b1b63b5
Revert "Remove iris from feature.extras.dependencies because it depen…
weiji14 Jun 18, 2026
4568eff
Add iris under feature.dask.dependencies
weiji14 Jun 18, 2026
ebc8918
Add requires_dask marker to two unit tests checking open_mfdataset
weiji14 Jun 18, 2026
12fc62c
Add iris to feature.doc.dependencies
weiji14 Jun 18, 2026
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7 changes: 4 additions & 3 deletions pixi.toml
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Expand Up @@ -93,9 +93,6 @@ pooch = "*"
# calendar
cftime = "*"

# other
iris = "*"

@weiji14 weiji14 Jun 14, 2026

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Removed iris from feature.extras.dependencies because it depends on dask, and was polluting the test-py313-no-dask environment.

Error:   × failed to solve requirements of environment 'test-py313-no-dask' for platform 'win-64'
  ├─▶   × failed to solve the environment

  ╰─▶ Cannot solve the request because of: iris * cannot be installed because there are no viable options:
      ├─ iris 2.4.0 | 2.4.0 | 2.4.0 | 2.4.0 | 3.0.0 | 3.0.0 | 3.0.0 | 3.0.0 | 3.0.1 | 3.0.1 | 3.0.1 | 3.0.1 | 3.0.1 | 3.0.1 | 3.0.1 | 3.0.1 | 3.0.2 | 3.0.2 | 3.0.2 | 3.0.2 | 3.0.2 | 3.0.2 | 3.0.2 | 3.0.2 | 3.0.2 | 3.0.2 | 3.0.2 | 3.0.2 | 3.0.3 | 3.0.3 | 3.0.3 | 3.0.3 | 3.0.4 | 3.0.4 | 3.0.4 | 3.1.0 | 3.1.0 | 3.1.0 | 3.1.0 | 3.1.0 | 3.1.0 | 3.1.0 would require
      │  └─ dask >=2, which cannot be installed because there are no viable options:
      │     └─ dask 2.0.0 | 2.1.0 | 2.2.0 | 2.3.0 | 2.4.0 | 2.5.0 | 2.5.2 | 2.6.0 | 2.7.0 | 2.8.0 | 2.8.1 | 2.9.0 | 2.9.1 | 2.9.2 | 2.10.0 | 2.10.1 | 2.11.0 | 2.12.0 | 2.13.0 | 2.14.0 | 2.15.0 | 2.16.0 | 2.17.0 | 2.17.1 | 2.17.2 | 2.18.0 | 2.18.1 | 2.19.0 | 2.20.0 | 2.21.0 | 2.22.0 | 2.23.0 | 2.24.0 | 2.25.0 | 2.26.0 | 2.27.0 | 2.28.0 | 2.29.0 | 2.30.0 | 2020.12.0 | 2021.1.0 | 2021.1.1 | 2021.2.0 | 2021.3.0 | 2021.3.1 | 2021.4.0 | 2021.4.1 | 2021.5.0 | 2021.5.1 | 2021.6.0 | 2021.6.1 | 2021.6.2 | 2021.7.0 | 2021.7.1 | 2021.7.2 | 2021.8.0 | 2021.8.1 | 2021.9.0 | 2021.9.1 | 2021.10.0 | 2021.11.0 | 2021.11.1 | 2021.11.2 | 2021.12.0 | 2022.1.0 | 2022.1.1 | 2022.2.0 | 2022.2.1 | 2022.3.0 | 2022.3.0 | 2022.4.0 | 2022.4.1 | 2022.4.2 | 2022.5.0 | 2022.5.1 | 2022.5.2 | 2022.6.0 | 2022.6.1 | 2022.7.0 | 2022.7.1 | 2022.8.0 | 2022.8.0 | 2022.8.0 | 2022.8.1 | 2022.9.0 | 2022.9.1 | 2022.9.2 | 2022.10.0 | 2022.10.0 | 2022.10.0 | 2022.10.2 | 2022.11.0 | 2022.11.1 | 2022.12.0 | 2022.12.1 | 2023.1.0 | 2023.1.1 | 2023.2.0 | 2023.2.1 | 2023.3.0 | 2023.3.1 | 2023.3.2 | 2023.4.0 | 2023.4.1 | 2023.5.0 | 2023.5.1 | 2023.6.0 | 2023.6.1 | 2023.7.0 | 2023.7.1 | 2023.8.0 | 2023.8.1 | 2023.9.0 | 2023.9.1 | 2023.9.2 | 2023.9.3 | 2023.10.0 | 2023.10.1 | 2023.11.0 | 2023.12.0 | 2023.12.1 | 2024.1.0 | 2024.1.1 | 2024.2.0 | 2024.2.1 | 2024.3.0 | 2024.3.0 | 2024.3.1 | 2024.4.0 | 2024.4.1 | 2024.4.2 | 2024.5.0 | 2024.5.1 | 2024.5.2 | 2024.6.0 | 2024.6.2 | 2024.7.0 | 2024.7.1 | 2024.8.0 | 2024.8.1 | 2024.8.2 | 2024.9.0 | 2024.9.1 | 2024.10.0 | 2024.11.0 | 2024.11.1 | 2024.11.2 | 2024.11.2 | 2024.12.0 | 2024.12.1 | 2025.1.0 | 2025.2.0 | 2025.3.0 | 2025.3.1 | 2025.4.0 | 2025.4.1 | 2025.5.0 | 2025.5.1 | 2025.5.1 | 2025.7.0 | 2025.9.0 | 2025.9.1 | 2025.9.2 | 2025.10.0 | 2025.11.0 | 2025.12.0 | 2026.1.1 | 2026.1.2 | 2026.1.2 | 2026.3.0 | 2026.6.0 would require
      │        └─ dask-core 2.0.0.*, for which no candidates were found.

This might reduce test coverage on iris-dependent tests though, so someone should verify if this makes sense.

@dcherian dcherian Jun 18, 2026

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can we keep this section but use a similar constraint on iris in [feature.nodask.constraints]

@weiji14 weiji14 Jun 18, 2026 •
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Doesn't work, if I do:

 [feature.nodask.constraints]
 dask-core = "<0.0a0"
+iris = "<0.0a0"

pixi complains like this:

Error:   × failed to solve requirements of environment 'test-py314-no-dask' for platform 'osx-arm64'
  ├─▶   × failed to solve the environment
  │
  ╰─▶ Cannot solve the request because of: The following packages are incompatible
      └─ iris * can be installed with any of the following options:
         └─ iris 3.1.0 | 3.1.0 | 3.2.0 | 3.2.0.post0 | 3.2.1 | 3.2.1.post0 | 3.3.0 | 3.3.1 |
      3.4.0 | 3.4.1 | 3.5.0 | 3.6.0 | 3.6.0 | 3.6.1 | 3.7.0 | 3.7.1 | 3.8.0 | 3.8.1 | 3.9.0 |
      3.10.0 | 3.10.0 | 3.10.0 | 3.11.0 | 3.11.1 | 3.11.1 | 3.12.0 | 3.12.1 | 3.12.2 | 3.12.3
      | 3.13.0 | 3.13.1 | 3.14.0 | 3.14.0 | 3.14.0 | 3.14.1 | 3.15.0
      ├─ the constraint iris <0.0a0 cannot be fulfilled
      ├─ the constraint iris <0.0a0 cannot be fulfilled
      ├─ ...

I think I'll follow the no-numba example, and just add iris to all the environments manually the dask feature environment.


[feature.extras.pypi-dependencies]
# array
jax = "*" # no way to get cpu-only jaxlib from conda if gpu is present
Expand Down Expand Up @@ -376,6 +373,9 @@ numpydoc = "*"
[feature.numpydoc-lint.tasks]
numpydoc-lint = { cmd = "python ci/numpydoc-public-api.py" }

[feature.nodask.constraints]
dask-core = "<0.0a0"

[environments]
# Testing
# test-just-xarray = { features = ["test"] } # https://github.com/pydata/xarray/pull/10888/files#r2511336147
Expand All @@ -390,6 +390,7 @@ test-py313-no-numba = { features = [
] }
test-py313-no-dask = { features = [
"py312",
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"nodask",
"test",
"backends",
"accel",
Expand Down
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