extendleft is expected to add items in the wrong order (which isn't even possible in general case for an iterable).
extendleft
Python's native collections.deque can't pass your tests. How come?
collections.deque
The description should list all the specifications.
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extendleftis expected to add items in the wrong order (which isn't even possible in general case for an iterable).Python's native
collections.dequecan't pass your tests. How come?The description should list all the specifications.