Method __getattr__

Lib/test/test_descr.py:5966–5971

(self, attr)

        class A:
            __slotnames__ = [S('spam')]
            def __getattr__(self, attr):
                if attr == 'spam':
                    A.__slotnames__[:] = [S('spam')]
                    return 42
                else:
                    raise AttributeError

        import copyreg
        expected = (copyreg.__newobj__, (A,), (None, {'spam': 42}), None, None)