Python - comparing values in the same dictionary

Question

I have a dictionary:

d = {\'Trump\': [\'MAGA\', \'FollowTheMoney\'],
     \'Clinton\': [\'dems\', \'Clinton\'],
     \'Stein\': [\'FollowTheMoney\', \'Atlant         


        

Answer 1

You can use Counter to tally how many times each value appears in d.

d = {'Trump': ['MAGA', 'FollowTheMoney'],
     'Clinton': ['dems', 'Clinton'],
     'Stein': ['FollowTheMoney', 'Atlanta']}

from collections import Counter

c = Counter(x for xs in d.values() for x in xs)

In this example, the value of c is

Counter({'Atlanta': 1,
         'Clinton': 1,
         'FollowTheMoney': 2,
         'MAGA': 1,
         'dems': 1})

Then choose values for which the count is exactly 1.

update_d = {k: [v for v in vs if c[v] == 1] for k, vs in d.items()}