问题描述
mylist = [[1,2],[4,5],[3,4],[4,3],[2,1],[1,2]]
我想删除重复项,重复项可以反转.结果应该是:
I want to remove duplicate items, duplicated items can be reversed. The result should be :
mylist = [[1,2],[4,5],[3,4]]
如何在 Python 中实现这一点?
How do I achieve this in Python?
推荐答案
如果顺序很重要,您可以随时使用 OrderedDict
If the Order Matters you can always use OrderedDict
>>> unq_lst = OrderedDict() >>> for e in lst: unq_lst.setdefault(frozenset(e),[]).append(e) >>> map(list, unq_lst.keys()) [[1, 2], [4, 5], [3, 4]]