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-rw-r--r--numpy/lib/function_base.py5
-rw-r--r--numpy/lib/tests/test_function_base.py10
2 files changed, 13 insertions, 2 deletions
diff --git a/numpy/lib/function_base.py b/numpy/lib/function_base.py
index 9475c2edf..472d7eecc 100644
--- a/numpy/lib/function_base.py
+++ b/numpy/lib/function_base.py
@@ -2803,8 +2803,9 @@ def percentile(a, q, interpolation='linear', axis=None, out=None,
the contents of the input array. In this case you should not make
any assumptions about the content of the passed in array `a` after
this function completes -- treat it as undefined. Default is False.
- Note that, if `overwrite_input` is True and the input is not
- already an array, an error will be raised.
+ Note that, if the `a` input is not already an array this parameter
+ will have no effect, `a` will be converted to an array internally
+ regardless of the value of this parameter.
Returns
-------
diff --git a/numpy/lib/tests/test_function_base.py b/numpy/lib/tests/test_function_base.py
index a69c82e18..dd0b6e0ee 100644
--- a/numpy/lib/tests/test_function_base.py
+++ b/numpy/lib/tests/test_function_base.py
@@ -1530,9 +1530,19 @@ class TestScoreatpercentile(TestCase):
np.percentile(a, [50], overwrite_input=False)
assert_equal(a, np.array([2, 3, 4, 1]))
+ a = np.array([2, 3, 4, 1])
np.percentile(a, [50])
assert_equal(a, np.array([2, 3, 4, 1]))
+ def test_percentile_overwrite(self):
+ a = np.array([2, 3, 4, 1])
+ b = np.percentile(a, [50], overwrite_input=True)
+ assert_equal(b, np.array([2.5]))
+
+ b = np.percentile([2, 3, 4, 1], [50], overwrite_input=True)
+ assert_equal(b, np.array([2.5]))
+
+
class TestMedian(TestCase):
def test_basic(self):