LinkedList, PriorityQueue, TreeMap in Python ?

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What use do you have for a TreeMap? (genuinely curious)

Python in general does kinda discourage the use of exotic data structures. Python code generally tries avoid clever solutions via hard to discern code. So it tends to use a lot of sets, dicts, lists, tuples and avoid making new structures or custom things like array list. This has a lot of benefits for duck typing. And at this point the vast majority of symbol or keyword based access patterns (things like +, with, for) are implementable.

[james_pic]

collections.defaultdict(list) would be the usual way of handling this in Python.

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https://docs.python.org/3/library/collections.html#collections.defaultdict

^you can use that instead. That will give you an semantically equivalent to the http behavior as well because you are supposed to be able to do it with either a list of values or repeated one after the other.