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Refine statistics.NormalDist documentation and improve test coverage (GH-12208)

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Raymond Hettinger 2019-03-06 23:23:55 -08:00 • committed by Miss Islington (bot)
parent 318d537daa
commit 1f58f4fa6a
2 changed files with 26 additions and 29 deletions
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3
Lib/test/test_statistics.py
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@ -2123,6 +2123,7 @@ class TestNormalDist(unittest.TestCase):
0.3605, 0.3589, 0.3572, 0.3555, 0.3538,
]):
self.assertAlmostEqual(Z.pdf(x / 100.0), px, places=4)
self.assertAlmostEqual(Z.pdf(-x / 100.0), px, places=4)
# Error case: variance is zero
Y = NormalDist(100, 0)
with self.assertRaises(statistics.StatisticsError):
@ -2262,7 +2263,7 @@ class TestNormalDist(unittest.TestCase):
self.assertEqual(X * y, NormalDist(1000, 150)) # __mul__
self.assertEqual(y * X, NormalDist(1000, 150)) # __rmul__
self.assertEqual(X / y, NormalDist(10, 1.5)) # __truediv__
with self.assertRaises(TypeError):
with self.assertRaises(TypeError): # __rtruediv__
y / X
def test_equality(self):