get_following_profiles.py

import tweepy, json, time, sys

auth = tweepy.OAuth1UserHandler(
    <api keys here>
)

api = tweepy.API(auth)

d = json.loads(open(sys.argv[1]).read().split("=", 1)[1])

BATCH=100

users = []

for i in range(0, len(d), BATCH):
    ids = []
    for f in d[i:i+BATCH]:
        ids.append(f["following"]["accountId"])

    u = api.lookup_users(user_id=ids)
    users.extend(i._json for i in u)
    print(f"{i+100}/{len(d)}")

open("users.json", "w").write(json.dumps(users))