Make development great again!

mocket.py

from collections import Counter

import requests
import redis
from mocket import Mocket

Mocket.enable('example', '.')

# get all users
users = requests.get(
    'http://jsonplaceholder.typicode.com/users'
).json()

# users will be retrieved by userId
users_by_id = {u['id']: u for u in users}

todos = requests.get(
    'http://jsonplaceholder.typicode.com/todos'
).json()

# let's put some salt and pepper, skipping some todos
filtered_todos = [
    t for t in todos if 'et' in t['title']
]

# use a counter for user todos
user_todos = Counter()
for t in filtered_todos:
    user_todos[t['userId']] += 1

# it's going to connect to localhost on port 6379
r = redis.StrictRedis()# be careful when you flush your DB
# in case you need it, it's as simple as
# r.flushdb()

for k, v in user_todos.items():
    r.zadd("todos", {users_by_id[k]["username"]: v})

print(r.zrange('todos', 0, len(todos), desc=True, withscores=True))

On a Debian/Ubuntu, you'll need to execute to create a virtualenv, then:

pip install requests redis mocket ipython
sudo apt install redis-server

After the first execution, there won't be any more accesses to the network (neither Redis nor HTTPS).
Mocket will be using the example.json file produced by the first run.