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[FIX] DistMatrix should return numpy datatypes #3865

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Jun 7, 2019
Merged

[FIX] DistMatrix should return numpy datatypes #3865

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6f67db7
distmatrix: return numpy datatypes
robertcv Jun 7, 2019
1fd6a65
tests: distmatrix returns numpy datatypes
robertcv Jun 7, 2019
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2 changes: 1 addition & 1 deletion Orange/misc/distmatrix.py
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Original file line number Diff line number Diff line change
Expand Up @@ -51,7 +51,7 @@ def __array_finalize__(self, obj):

def __array_wrap__(self, out_arr, context=None):
if out_arr.ndim == 0: # a single scalar
return out_arr.item()
return out_arr[()]
return np.ndarray.__array_wrap__(self, out_arr, context)

"""
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11 changes: 11 additions & 0 deletions Orange/tests/test_distances.py
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Expand Up @@ -186,6 +186,17 @@ def test_save(self):
["danny", "eve", "frank"])
self.assertEqual(m.axis, 0)

def test_numpy_type(self):
"""GH-3658"""
data1 = np.array([1, 2], dtype=np.int64)
data2 = np.array([2, 3], dtype=np.int64)
dm1, dm2 = DistMatrix(data1), DistMatrix(data2)

self.assertIsInstance(dm1.max(), np.int64)
self.assertNotIsInstance(dm1.max(), int)
with self.assertRaises(AssertionError):
np.testing.assert_array_equal(dm1, dm2)


# noinspection PyTypeChecker
class TestEuclidean(TestCase):
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