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Code Issues Projects Releases Packages Wiki Activity Actions 9

bpo-35606: Implement math.prod (GH-11359)

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Pablo Galindo 2019-02-07 07:04:02 +00:00 • committed by Raymond Hettinger
parent e9bc4172d1
commit bc09851586
6 changed files with 260 additions and 1 deletions
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31
Lib/test/test_math.py
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@ -1724,6 +1724,37 @@ class IsCloseTests(unittest.TestCase):
self.assertAllClose(fraction_examples, rel_tol=1e-8)
self.assertAllNotClose(fraction_examples, rel_tol=1e-9)
def test_prod(self):
prod = math.prod
self.assertEqual(prod([]), 1)
self.assertEqual(prod([], start=5), 5)
self.assertEqual(prod(list(range(2,8))), 5040)
self.assertEqual(prod(iter(list(range(2,8)))), 5040)
self.assertEqual(prod(range(1, 10), start=10), 3628800)
self.assertEqual(prod([1, 2, 3, 4, 5]), 120)
self.assertEqual(prod([1.0, 2.0, 3.0, 4.0, 5.0]), 120.0)
self.assertEqual(prod([1, 2, 3, 4.0, 5.0]), 120.0)
self.assertEqual(prod([1.0, 2.0, 3.0, 4, 5]), 120.0)
# Test overflow in fast-path for integers
self.assertEqual(prod([1, 1, 2**32, 1, 1]), 2**32)
# Test overflow in fast-path for floats
self.assertEqual(prod([1.0, 1.0, 2**32, 1, 1]), float(2**32))
self.assertRaises(TypeError, prod)
self.assertRaises(TypeError, prod, 42)
self.assertRaises(TypeError, prod, ['a', 'b', 'c'])
self.assertRaises(TypeError, prod, ['a', 'b', 'c'], '')
self.assertRaises(TypeError, prod, [b'a', b'c'], b'')
values = [bytearray(b'a'), bytearray(b'b')]
self.assertRaises(TypeError, prod, values, bytearray(b''))
self.assertRaises(TypeError, prod, [[1], [2], [3]])
self.assertRaises(TypeError, prod, [{2:3}])
self.assertRaises(TypeError, prod, [{2:3}]*2, {2:3})
self.assertRaises(TypeError, prod, [[1], [2], [3]], [])
with self.assertRaises(TypeError):
prod([10, 20], [30, 40]) # start is a keyword-only argument
def test_main():
from doctest import DocFileSuite