Update filter_unique.md

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Isabelle Viktoria Maciohsek
2020-01-08 18:57:53 +02:00
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@ -5,7 +5,7 @@ tags: list,beginner
Filters out the unique values in a list.
Use a `Counter` to get the count of each value in the list.
Use a `collections.Counter` to get the count of each value in the list.
Use list comprehension to create a list containing only the non-unique values.
```py