R: 12:BadContextManager: Badly implemented Context manager, implements __enter__ but not __exit__
R: 12:BadContextManager: Too few public methods (0/2)
R: 32:BadROContainer: Badly implemented Container, implements __len__ but not __getitem__
R: 32:BadROContainer: Badly implemented Mutable container, implements __setitem__ but not __delitem__
R: 32:BadROContainer: Too few public methods (0/2)
R: 43:BadContainer: Badly implemented Mutable container, implements __setitem__ but not __delitem__
