CF API

import requests

response1 = requests.get("https://codeforces.com/api/user.status?handle=erfanul007&from=1&count=2000")
submission1 = response1.json()['result']

user1 = dict()

for val in submission1:
    if val['verdict'] == 'OK' and 'rating' in val['problem']:
        problemID = str(val['problem']['contestId']) + val['problem']['index']
        user1[problemID] = val['problem']['rating']

# print(user1)

response2 = requests.get("https://codeforces.com/api/user.status?handle=el.duivel&from=1&count=2000")
submission2 = response2.json()['result']

user2 = dict()

for val in submission2:
    if val['verdict'] == 'OK' and 'rating' in val['problem']:
        problemID = str(val['problem']['contestId']) + val['problem']['index']
        user2[problemID] = val['problem']['rating']

# print(user2)

unqsub = list()

for subs in user1:
    if subs not in user2 and user1[subs] >= 2000:
        unqsub.append(subs)

print(unqsub)