In Python, it's `import itertools` and `list(itertools.chain.from_iterable(list2d))` or `[item for sublist in list2d for item in sublist]`. In Scala, it is `list2d.flatten`.
In fact, Python is against making a richer stdlib in general.
"It has been discussed ad nauseam on comp.lang.python. People seem to enjoy writing their own versions of flatten more than finding legitimate use cases that don't already have trivial solutions." from https://softwareengineering.stackexchange.com/questions/2542...
And, intuitively, when you don't want to provide a helper function, the user code gets longer.
Not that this is better or worse. It's just that, specifically, on the brevity aspect, Python code would generally becomes longer. Because, as you see in the quote, "People seem to enjoy writing their own versions of flatten".
Python has Lists (arrays), Dict, and Sets. That's pretty much it.
There's no linked lists. There's no sorted maps, no sorted sets, no maps that preserve insertion order, no queues, no priority queues, no bitsets. And there's no immutable collection in Python besides strings.
Moreover, scala has synchronized collections that can work over multiple threads. I guess all collections work that way in Python, but that's because Python doesn't even support true thread parallelism in the first place!
Also, if we're talking about the number of methods on the collections, Scala has way way more. map/foreach/filter/foldl/foldr/option/drop/take/first/last etc etc.
