fix(typing): fix mypy errors in indexing with numpy 2.5.1 stubs#231
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fix(typing): fix mypy errors in indexing with numpy 2.5.1 stubs#231d-v-b wants to merge 1 commit into
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numpy 2.5.1's type stubs infer a float64 array for np.asarray on a narrowed list/int, breaking the declared selection types in replace_lists and CoordinateIndexer.__init__. Cast the asarray result in replace_lists (a plain list may hold ints or bools, so the stubs cannot infer ArrayOfIntOrBool), and pass dtype=np.intp explicitly in CoordinateIndexer, which also makes the runtime dtype deterministic. Assisted-by: ClaudeCode:claude-fable-5
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Fixes the two mypy errors reported on zarr-developers#4151 (the dependabot bump of numpy 2.5.0 → 2.5.1 and mypy 2.1.0 → 2.2.0), both in
src/zarr/core/indexing.py:replace_lists(line 514): numpy 2.5.1's stubs inferndarray[..., float64]fornp.asarray(dim_sel)on a narrowedlist. A plainlistmay hold ints or bools, so the stubs cannot inferArrayOfIntOrBool; the result is nowcastto that alias, matching the existing cast style in the file.CoordinateIndexer.__init__(line 1195):np.asarray([i])on anis_integer-narrowedilikewise infers float64. Passingdtype=np.intpexplicitly satisfiesCoordinateSelectionNormalizedand makes the runtime dtype deterministic across platforms as a bonus.Verified locally:
uv run mypy src testsclean with the current lock (numpy 2.5.0) and with numpy upgraded to 2.5.1uv run pytest tests/test_indexing.py: 427 passed, 1 skipped, 2 xfailed🤖 Generated with Claude Code