kszucs commented on a change in pull request #7952:
URL: https://github.com/apache/arrow/pull/7952#discussion_r471360126
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File path: python/pyarrow/tests/test_array.py
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@@ -975,6 +975,47 @@ def check_result(result, expected_field_names,
expected_type_codes,
arr = pa.UnionArray.from_sparse(logical_types, [binary, int64[1:]])
+def test_union_array_to_pylist_with_nulls():
+ # ARROW-9556
+ arr = pa.UnionArray.from_sparse(
+ pa.array([0, 1, 0, 0, 1], type=pa.int8()),
+ [
+ pa.array([0.0, 1.1, None, 3.3, 4.4]),
+ pa.array([True, True, False, True, False]),
+ ]
+ )
+ assert arr.to_pylist() == [0.0, True, None, 3.3, False]
+
+ arr = pa.UnionArray.from_sparse(
+ pa.array([0, 1, 0, 0, 1], type=pa.int8()),
+ [
+ pa.array([0.0, 1.1, None, 3.3, 4.4]),
+ pa.array([True, None, False, True, False]),
+ ]
+ )
+ assert arr.to_pylist() == [0.0, None, None, 3.3, False]
Review comment:
The first example has nulls in a single child the second in both
children - I'm going to keep a second ones.
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