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bpo-44558: Make the implementation consistency of operator.indexOf (GH-27012)

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(cherry picked from commit 09302405d2)

Co-authored-by: Dong-hee Na <donghee.na@python.org>
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Miss Islington (bot) 2021-07-05 02:52:04 -07:00 • committed by GitHub
parent fe847a6285
commit 9f47d872db
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3 changed files with 6 additions and 1 deletions
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2
Lib/operator.py
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@ -173,7 +173,7 @@ def getitem(a, b):
def indexOf(a, b):
"Return the first index of b in a."
for i, j in enumerate(a):
if j == b:
if j is b or j == b:
return i
else:
raise ValueError('sequence.index(x): x not in sequence')

3
Lib/test/test_operator.py
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@ -184,6 +184,9 @@ class OperatorTestCase:
self.assertRaises(ZeroDivisionError, operator.indexOf, BadIterable(), 1)
self.assertEqual(operator.indexOf([4, 3, 2, 1], 3), 1)
self.assertRaises(ValueError, operator.indexOf, [4, 3, 2, 1], 0)
nan = float("nan")
self.assertEqual(operator.indexOf([nan, nan, 21], nan), 0)
self.assertEqual(operator.indexOf([{}, 1, {}, 2], {}), 0)
def test_invert(self):
operator = self.module

2
Misc/NEWS.d/next/Library/2021-07-04-21-16-53.bpo-44558.cm7Slv.rst Normal file
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@ -0,0 +1,2 @@
Make the implementation consistency of :func:`~operator.indexOf` between
C and Python versions. Patch by Dong-hee Na.