Filter unique list values
Creates a list with the unique values filtered out.
- Use
collections.Counter
to get the count of each value in the list. - Use a list comprehension to create a list containing only the non-unique values.
from collections import Counter def filter_unique(lst): return [item for item, count in Counter(lst).items() if count > 1] filter_unique([1, 2, 2, 3, 4, 4, 5]) # [2, 4]