Python trades runtime speed for programmer convenience, and most of the time it’s a good tradeoff. One doesn’t typically need the raw speed of C for most workaday applications. And when you need to ...

supports move_to_end in O(1). On get, move the key to the end (most recent). On put, add/update the key at the end. If over capacity, pop the first item (least recently used). This achieves O(1) for ...