wjones127 commented on a change in pull request #11855:
URL: https://github.com/apache/arrow/pull/11855#discussion_r763269450
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File path: python/pyarrow/tests/test_array.py
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@@ -891,6 +891,14 @@ def test_list_from_arrays(list_array_type,
list_type_factory):
result.validate(full=True)
+def test_map_labelled():
+ t = pa.map_(pa.field("name", "string", nullable=False), "int64")
+ arr = pa.array([[('a', 1), ('b', 2)], [('c', 3)]], type=t)
+ assert arr.type.key_field == pa.field("name", pa.utf8(), nullable=False)
Review comment:
I tried and it does not. I think that is intentional, given this test in
C++:
https://github.com/apache/arrow/blob/85b276dd13512d6676a0bc2dc703a0f9b6934236/cpp/src/arrow/type_test.cc#L1232-L1238
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