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Fix fancy index item bug #543

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Merged
lshaw8317 merged 1 commit into from
Dec 9, 2025
Merged

Fix fancy index item bug #543

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2 changes: 1 addition & 1 deletion src/blosc2/ndarray.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4013,7 +4013,7 @@ def _get_set_findex_default(self, _slice, out=None, value=None):
new_shape = sel_idx.newshape(out.shape)
out[sel_idx.raw] = chunk[sub_idx].reshape(new_shape)
else:
chunk[sub_idx] = value if np.isscalar(value) else value[sel_idx]
chunk[sub_idx] = value if np.isscalar(value) else value[sel_idx.raw]
out = super().set_slice((start, stop), chunk)
return out

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12 changes: 12 additions & 0 deletions tests/ndarray/test_setitem.py
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Expand Up @@ -110,3 +110,15 @@ def test_ndfield():
fb[:] = blosc2.full(shape, fill_value=1, dtype=np.float64)
assert np.allclose(sa["a"][:], nsa["a"])
assert np.allclose(sa["b"][:], nsa["b"])


def test_setitem_fancy_index():
out = blosc2.zeros(10)
idx = np.array([1, 6, 7])
value = np.arange(0, 3)
out[idx] = value

out_numpy = np.zeros(10)
out_numpy[idx] = value

np.testing.assert_array_equal(out[:], out_numpy)
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