Creates a list with the unique values filtered out.
collections.Counterto get the count of each value in the list.
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]
Creates a list with the non-unique values filtered out.
Creates a dictionary with the unique values of a list as keys and their frequencies as the values.
Splits values into two groups, based on the result of the given filtering function.