Better to use the method demonstrated in functools' lru_cache: https://github.com/python/cpython/blob/3.6/Lib/functools.py#L421 https://github.com/python/cpytho

Better to use the method demonstrated in functools' lru_cache: https://github.com/python/cpython/blob/3.6/Lib/functools.py#L421 https://github.com/python/cpython/blob/3.6/Lib/functools.py#...