Python – comparing values in the same dictionary

Python – comparing values in the same dictionary

Not as elegant as using Counter, but does remove duplicates without the use of modules:

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

dupvals = [item for sublist in d.values() for item in sublist] # get all values from all keys into a list
dups = [] # list to hold duplicates

for i in dupvals:
    if dupvals.count(i) > 1:
        dups.append(i)

dupvals = set(dups) # keep only one item for each duplicated item

new_d = {}

for key,values in d.items():
    for value in values:
        if not value in dupvals:
            new_d.setdefault(key, []).append(value)

print new_d # {Clinton: [dems, Clinton], Trump: [MAGA], Stein: [Atlanta]}

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()}

Python – comparing values in the same dictionary