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30-seconds-of-code/snippets/filter_unique.md
2019-10-08 09:39:12 +03:00

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filter_unique list,beginner

Filters out the unique values in a list.

Use list comprehension and list.count() to create a list containing only the non-unique values.

def filter_unique(lst):
  return [x for x in set(item for item in lst if lst.count(item) > 1)]
filter_unique([1, 2, 2, 3, 4, 4, 5]) # [2, 4]