## Feature CPython: ```python >>> from collections import deque >>> deque((1, 2)).__rmul__(2) deque([1, 2, 1, 2]) ``` RustPython: ```python >>>>> from collections import deque >>>>> deque((1, 2)).__rmul__(2) Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'deque' object has no attribute '__rmul__' ```