pitrou commented on a change in pull request #9778:
URL: https://github.com/apache/arrow/pull/9778#discussion_r603317984
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File path: rust/arrow-pyarrow-integration-testing/tests/test_sql.py
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@@ -78,3 +78,23 @@ def test_time32_python(self):
del expected
# No leak of C++ memory
self.assertEqual(old_allocated, pyarrow.total_allocated_bytes())
+
+ def test_list_array(self):
+ """
+ Python -> Rust -> Python
+ """
+ old_allocated = pyarrow.total_allocated_bytes()
+ a = pyarrow.array([[1, 2], [1, 2]], pyarrow.list_(pyarrow.int64()))
+ b = arrow_pyarrow_integration_testing.round_trip(a)
+ # list equality does not work, so we check the elements
Review comment:
> `list<item: int64> list<: int64 not null>`
Ah, besides the nullable bit being unset, you also see that in the second
case, the name of the nested field inside the list type is empty (it's "item"
in the first case).
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