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bpo-41513: Improve speed and accuracy of math.hypot() (GH-21803)

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Raymond Hettinger 2020-08-15 19:38:19 -07:00 • committed by GitHub
parent 39dab24621
commit fff3c28052
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3 changed files with 44 additions and 6 deletions
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7
Lib/test/test_math.py
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@ -795,7 +795,8 @@ class MathTests(unittest.TestCase):
# Verify scaling for extremely large values
fourthmax = FLOAT_MAX / 4.0
for n in range(32):
self.assertEqual(hypot(*([fourthmax]*n)), fourthmax * math.sqrt(n))
self.assertTrue(math.isclose(hypot(*([fourthmax]*n)),
fourthmax * math.sqrt(n)))
# Verify scaling for extremely small values
for exp in range(32):
@ -904,8 +905,8 @@ class MathTests(unittest.TestCase):
for n in range(32):
p = (fourthmax,) * n
q = (0.0,) * n
self.assertEqual(dist(p, q), fourthmax * math.sqrt(n))
self.assertEqual(dist(q, p), fourthmax * math.sqrt(n))
self.assertTrue(math.isclose(dist(p, q), fourthmax * math.sqrt(n)))
self.assertTrue(math.isclose(dist(q, p), fourthmax * math.sqrt(n)))
# Verify scaling for extremely small values
for exp in range(32):