from collections import Counter def filter_non_unique(lst): return [item for item, count in Counter(lst).items() if count == 1]
filter_non_unique([1, 2, 2, 3, 4, 4, 5]) # [1, 3, 5]
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from collections import Counter def filter_non_unique(lst): return [item for item, count in Counter(lst).items() if count == 1]
filter_non_unique([1, 2, 2, 3, 4, 4, 5]) # [1, 3, 5]
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