Python: Container object that preserves ordering and enforces uniqueness?
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Published on 2010-05-13T22:03:29Z
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Is there anything like this in the standard library? I've looked but haven't found it.
It needs to be like a list (preserves order) but also like a set (elements can only appear once).
So if you give it ['a', 'b', 'a'] it should return ['a', 'b']
Thanks!
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