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fix group by > 1 group, then map #11005

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Merged
dcherian merged 12 commits into from
Jan 2, 2026
+19 −4
Merged

fix group by > 1 group, then map #11005

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f6c2892
fix group by > 1 group, then map
joshua-gould Dec 11, 2025
d4e203d
Update xarray/core/groupby.py
joshua-gould Dec 11, 2025
9d7c9ea
add test
joshua-gould Dec 11, 2025
44c7092
Merge remote-tracking branch 'origin/groupby-multi-map' into groupby-…
joshua-gould Dec 11, 2025
ac36a5a
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Dec 11, 2025
1d1230a
Fix
dcherian Dec 12, 2025
4b4e209
add check for None
joshua-gould Dec 13, 2025
102787f
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Dec 13, 2025
ac53970
Merge branch 'main' into groupby-multi-map
joshua-gould Dec 14, 2025
99c102d
Add T_DataArray type import in groupby.py
dcherian Dec 16, 2025
710d5fc
Merge branch 'main' into groupby-multi-map
dcherian Dec 16, 2025
d01b3ac
Merge branch 'main' into groupby-multi-map
dcherian Jan 2, 2026
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4 changes: 3 additions & 1 deletion xarray/core/groupby.py
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Original file line number Diff line number Diff line change
Expand Up @@ -177,7 +177,9 @@ def _inverse_permutation_indices(positions, N: int | None = None) -> np.ndarray
return None
positions = [np.arange(sl.start, sl.stop, sl.step) for sl in positions]

newpositions = nputils.inverse_permutation(np.concatenate(positions), N)
newpositions = nputils.inverse_permutation(
np.concatenate(tuple(p for p in positions if p)), N
)
return newpositions[newpositions != -1]


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