Merge pull request #12447 from ahaldane/unrevert_multifield_view

ENH: add back the multifield copy->view change

1 files changed, 10 insertions, 0 deletions

diff --git a/numpy/lib/tests/test_io.py b/numpy/lib/tests/test_io.py
index b746937b9..f2d5d4ab5 100644
--- a/numpy/lib/tests/test_io.py
+++ b/numpy/lib/tests/test_io.py
@@ -355,6 +355,16 @@ class TestSaveTxt(object):
         c.seek(0)
         assert_equal(c.readlines(), [b'1 2\n', b'3 4\n'])
 
+    @pytest.mark.skipif(Path is None, reason="No pathlib.Path")
+    def test_multifield_view(self):
+        a = np.ones(1, dtype=[('x', 'i4'), ('y', 'i4'), ('z', 'f4')])
+        v = a[['x', 'z']]
+        with temppath(suffix='.npy') as path:
+            path = Path(path)
+            np.save(path, v)
+            data = np.load(path)
+            assert_array_equal(data, v)
+
     def test_delimiter(self):
         a = np.array([[1., 2.], [3., 4.]])
         c = BytesIO()