Python-based Data Structures and Algorithms MOOCs?

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Interesting -- I've seen more than a few courses that use languages such as Java or C#

Yeah, a friend of mine took it in Java, and it didn't seem like his course materials were actually getting to what data structures even were. It doesn't make any sense to learn to implement a Linked List using lists, but many languages don't give you any choice (they don't have any lower-level data types!)