> In Python, except for mutability, is there any difference between tuple and list? In my experience: Pure Python people get so excited about tuples ("oh, it's so Pythonic"); others: much less.

In my experience, people who don’t care about tuples are people who don’t understand them. It’s not much about being Pythonic or not (they exists in other languages) but rather about choosing the right data structure for solving your problem. Tuples are much more than a way of making immutable lists, they offer a type-safe and serializable representation of pairs and triplets; something you can’t have with a list. If you don’t use them yet, I really encourage you to document yourself (and again-- in general, not just in Python) because you’re missing something.