8000 Backport 6553 by charris · Pull Request #6573 · numpy/numpy · GitHub
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Merged
merged 3 commits into from
Oct 27, 2015
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Backport 6553 #6573

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120da4f
BUG: Fixed partition errors on empty input. Closes #6530
yashmehrotra Oct 26, 2015
9d0c247
TST: Added tests for empty partition and argpartition
yashmehrotra Oct 27, 2015
ac772b9
TST: Added regression test empty percentile, in ref to #6530 and #6553
yashmehrotra Oct 27, 2015
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TST: Added tests for empty partition and argpartition
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@yashmehrotra @charris
yashmehrotra authored and charris committed Oct 27, 2015
commit 9d0c2473445e14513f7ffb9531b37b7102f02a42
18 changes: 18 additions & 0 deletions numpy/core/tests/test_item_selection.py
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Expand Up @@ -68,6 +68,24 @@ def test_unicode_mode(self):
k = b'\xc3\xa4'.decode("UTF8")
assert_raises(ValueError, d.take, 5, mode=k)

def test_empty_partition(self):
# In reference to github issue #6530
a_original = np.array([0, 2, 4, 6, 8, 10])
a = a_original.copy()

# An empty partition should be a successful no-op
a.partition(np.array([], dtype=np.int16))

assert_array_equal(a, a_original)

def test_empty_argpartition(self):
# In reference to github issue #6530
a = np.array([0, 2, 4, 6, 8, 10])
a = a.argpartition(np.array([], dtype=np.int16))

b = np.array([0, 1, 2, 3, 4, 5])
assert_array_equal(a, b)


if __name__ == "__main__":
run_module_suite()
0