GH-39999: [Python] Fix tests for pandas with CoW / nightly integratio…

…n tests (#40000) ### Rationale for this change Fixing a failing test with pandas nightly because of CoW changes. * Closes: #39999 Authored-by: Joris Van den Bossche <[email protected]> Signed-off-by: Joris Van den Bossche <[email protected]>
apache · Feb 9, 2024 · 40cb0a2 · 40cb0a2
1 parent a0dec7f
commit 40cb0a2
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/python/pyarrow/tests/test_pandas.py b/python/pyarrow/tests/test_pandas.py
@@ -3650,7 +3650,8 @@ def test_singleton_blocks_zero_copy():
 
     prior_allocation = pa.total_allocated_bytes()
     result = t.to_pandas()
-    assert result['f0'].values.flags.writeable
+    # access private `_values` because the public `values` is made read-only by pandas
+    assert result['f0']._values.flags.writeable
     assert pa.total_allocated_bytes() > prior_allocation