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bpo-35664: Optimize operator.itemgetter (GH-11435)

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Raymond Hettinger 2019-01-07 09:38:41 -07:00 • committed by GitHub
parent 3f7983a25a
commit 2d53bed79c
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3 changed files with 54 additions and 5 deletions
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13
Lib/test/test_operator.py
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@ -401,6 +401,19 @@ class OperatorTestCase:
self.assertEqual(operator.itemgetter(2,10,5)(data), ('2', '10', '5'))
self.assertRaises(TypeError, operator.itemgetter(2, 'x', 5), data)
# interesting indices
t = tuple('abcde')
self.assertEqual(operator.itemgetter(-1)(t), 'e')
self.assertEqual(operator.itemgetter(slice(2, 4))(t), ('c', 'd'))
# interesting sequences
class T(tuple):
'Tuple subclass'
pass
self.assertEqual(operator.itemgetter(0)(T('abc')), 'a')
self.assertEqual(operator.itemgetter(0)(['a', 'b', 'c']), 'a')
self.assertEqual(operator.itemgetter(0)(range(100, 200)), 100)
def test_methodcaller(self):
operator = self.module
self.assertRaises(TypeError, operator.methodcaller)