felipecrv commented on PR #41189:
URL: https://github.com/apache/arrow/pull/41189#issuecomment-2054055091
> So the child validity would be undefined for null parent here?
It will de defined as valid + empty value. What empty means depends on the
type. For integers it's `0`, for strings it's `""`...
Example from the CI logs:
```
___________ [doctest] pyarrow.lib.FixedSizeListArray.values.__get__
____________
3323 FixedSizeListArray.flatten : ...
3324
3325 Examples
3326 --------
3327 >>> import pyarrow as pa
3328 >>> array = pa.array(
3329 ... [[1, 2], None, [3, None]],
3330 ... type=pa.list_(pa.int32(), 2)
3331 ... )
3332 >>> array.values
Differences (unified diff with -expected +actual):
@@ -1,8 +1,8 @@
-<pyarrow.lib.Int32Array object at ...>
+<pyarrow.lib.Int32Array object at 0x7f9ee8e430c0>
[
1,
2,
- null,
- null,
+ 0,
+ 0,
3,
null
```
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