Class RevNoIter

Lib/test/test_collections.py:1037–1038

        self.validate_abstract_methods(Reversible, '__reversed__', '__iter__')
        # Check reversible non-iterable (which is not Reversible)
        class RevNoIter:
            def __reversed__(self): return reversed([])
        class RevPlusIter(RevNoIter):
            def __iter__(self): return iter([])
        self.assertNotIsSubclass(RevNoIter, Reversible)