Introducing Python / Chap.11 Exercise 11.4

redis_choc_supply.py

import redis
import random
from time import sleep

conn = redis.Redis()
chocolates = ['sweet', 'bitter', 'milk', 'white', 'green tea']
while True:
    sleep(random.random())
    chocolate = random.choice(chocolates)
    conn.rpush('chocolates', chocolate)

redis_lucy.py

import redis
from time import sleep
from datetime import datetime
import random

conn = redis.Redis()
print('Lucy is ready...')
timeout = 20
while True:
    sleep(0.5)
    msg = conn.blpop('chocolates', timeout)
    remaining = conn.llen('chocolates')
    if msg:
        chocolate = msg[1]
        print("Lucy got a", chocolate, "at", datetime.now(), ". Still remaining", remaining, "pieces")