>Otherwise I find that the built-in Clojure data structures are so good for all-round use that it's difficult to justify the time to use anything else, except in extreme cases.
I don't know Clojure, so can't compare it's data structures with those of Python, but I've read a few times that Python's built-in data structures are so useful that for many applications, it suffices to just use them as is, or in combinations (e.g. lists of dicts, dicts of lists, ...), instead defining your own custom ones using classes. More so when used in combination with other Python features like {list,dict,set} comprehensions and libraries like itertools.
And I've found that to be somewhat true in my own Python work.
I don't know Clojure, so can't compare it's data structures with those of Python, but I've read a few times that Python's built-in data structures are so useful that for many applications, it suffices to just use them as is, or in combinations (e.g. lists of dicts, dicts of lists, ...), instead defining your own custom ones using classes. More so when used in combination with other Python features like {list,dict,set} comprehensions and libraries like itertools.
And I've found that to be somewhat true in my own Python work.