Class BadCompare

Lib/test/test_deque.py:107–109

        self.assertRaises(TypeError, d.count)       # too few args
        self.assertRaises(TypeError, d.count, 1, 2) # too many args
        class BadCompare:
            def __eq__(self, other):
                raise ArithmeticError
        d = deque([1, 2, BadCompare(), 3])
        self.assertRaises(ArithmeticError, d.count, 2)
        d = deque([1, 2, 3])