Create a Clean List from 2 Dictionaries by Filter on Key

clean_dict.py

# *-* coding: utf-8 *-*

import csv

d = {}
j = {}
followups = []


with open('data/campaign1.csv', 'r') as f1:
    rows = csv.reader(f1)
    for row in rows:
        d.setdefault(row[2], []).append(row[0])


with open('data/campaign2.csv', 'r') as f2:
    rows = csv.reader(f2)

    for row in rows:
        j.setdefault(row[2], []).append(row[0])


for name, idx in d.items():
    if name not in j.keys():
        print(name, idx[0])
        followups.append(idx[0])


print(followups)