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bpo-42222: Modernize integer test/conversion in randrange() #23064

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Merged
rhettinger merged 9 commits into from
Dec 28, 2020
Merged

bpo-42222: Modernize integer test/conversion in randrange() #23064

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e11b1dc
Use index() instead of testing int(x)==x
rhettinger Oct 31, 2020
ebe8391
Add blurb
rhettinger Oct 31, 2020
ed2f6fd
Deprecate float arguments and the ValueError
rhettinger Oct 31, 2020
ab9aeb7
Add more detail to blurb
rhettinger Dec 24, 2020
f32d175
Add tests
rhettinger Dec 24, 2020
ebcb257
Update the docs
rhettinger Dec 24, 2020
832d885
Improve blurb
rhettinger Dec 24, 2020
9e6945d
Cover the case with a unit step
rhettinger Dec 24, 2020
85cc9ee
More concise blurb
rhettinger Dec 25, 2020
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Add tests
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@rhettinger
rhettinger committed Dec 24, 2020
commit f32d175ea4ea487ecca725db239a432d9f688774
18 changes: 18 additions & 0 deletions Lib/test/test_random.py
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Original file line number Diff line number Diff line change
Expand Up @@ -517,6 +517,24 @@ def test_randrange_errors(self):
raises(0, 42, 0)
raises(0, 42, 3.14159)

def test_randrange_argument_handling(self):
randrange = self.gen.randrange
with self.assertWarns(DeprecationWarning):
randrange(10.0, 20, 2)
with self.assertWarns(DeprecationWarning):
randrange(10, 20.0, 2)
with self.assertWarns(DeprecationWarning):
randrange(10, 20, 2.0)
with self.assertWarns(DeprecationWarning):
with self.assertRaises(ValueError):
randrange(10.5)
with self.assertWarns(DeprecationWarning):
with self.assertRaises(ValueError):
randrange(10, 20.5)
with self.assertWarns(DeprecationWarning):
with self.assertRaises(ValueError):
randrange(10, 20, 1.5)

def test_randbelow_logic(self, _log=log, int=int):
# check bitcount transition points: 2**i and 2**(i+1)-1
# show that: k = int(1.001 + _log(n, 2))
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