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#19166: use an unused var in a test. Patch by Vajrasky Kok.
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@ -45,6 +45,9 @@ def test_keys(self):
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self.assertEqual(set(d.keys()), set())
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d = {'a': 1, 'b': 2}
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k = d.keys()
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self.assertEqual(set(k), {'a', 'b'})
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self.assertIn('a', k)
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self.assertIn('b', k)
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self.assertIn('a', d)
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self.assertIn('b', d)
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self.assertRaises(TypeError, d.keys, None)
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