Filter Non-Unique List Values

Introduction

In Python, a list is a collection of items that can be of different data types. Sometimes, we need to filter out the non-unique values from a list. In this challenge, you will create a function that takes a list as an argument and returns a new list with only the unique values.

Filter Non-Unique List Values

Write a Python function called filter_non_unique(lst) that takes a list as an argument and returns a new list with only the unique values. To solve this problem, you can follow these steps:

1. Use the collections.Counter method to get the count of each value in the list.
2. Use a list comprehension to create a list containing only the unique values.

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]

Summary

In this challenge, you have learned how to filter out non-unique values from a list using the collections.Counter method and a list comprehension. This is a useful technique to have in your Python programming toolbox.