MAINT: revert back to separate median implementation

Merging median and percentile make would break astropy and quantities as
we don't call mean anymore. These packages rely on overriding mean to
add their own median behavior.

1 files changed, 14 insertions, 0 deletions

diff --git a/numpy/lib/tests/test_function_base.py b/numpy/lib/tests/test_function_base.py
index 27e7302ce..fcf89cb90 100644
--- a/numpy/lib/tests/test_function_base.py
+++ b/numpy/lib/tests/test_function_base.py
@@ -1919,6 +1919,20 @@ class TestMedian(TestCase):
         assert_almost_equal(np.median(x2), 2)
         assert_allclose(np.median(x2, axis=0), x)
 
+    def test_subclass(self):
+        # gh-3846
+        class MySubClass(np.ndarray):
+            def __new__(cls, input_array, info=None):
+                obj = np.asarray(input_array).view(cls)
+                obj.info = info
+                return obj
+
+            def mean(self, axis=None, dtype=None, out=None):
+                return -7
+
+        a = MySubClass([1,2,3])
+        assert_equal(np.median(a), -7)
+
     def test_extended_axis(self):
         o = np.random.normal(size=(71, 23))
         x = np.dstack([o] * 10)