Find parity outliers

Isabelle Viktoria Maciohsek · Python, List, Math · Nov 2, 2020

Finds the items that are parity outliers in a given list.

  • Use collections.Counter with a list comprehension to count even and odd values in the list.
  • Use collections.Counter.most_common() to get the most common parity.
  • Use a list comprehension to find all elements that do not match the most common parity.
from collections import Counter

def find_parity_outliers(nums):
  return [
    x for x in nums
    if x % 2 != Counter([n % 2 for n in nums]).most_common()[0][0]
  ]
find_parity_outliers([1, 2, 3, 4, 6]) # [1, 3]

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