cached.py

import time
import datetime

from cachetools import cached, TTLCache  # 1 - let's import the "cached" decorator and the "TTLCache" object from cachetools
cache = TTLCache(maxsize=100, ttl=300)  # 2 - let's create the cache object.

@cached(cache)  # 3 - it's time to decorate the method to use our cache system!
def get_candy_price(candy_id):
    # let's use a sleep to simulate the time your function spends trying to connect to
    # the web service, 5 seconds will be enough.
    time.sleep(5)

    # let's pretend that the price returned by the web service is $1 for candies with a
    # odd candy_id and $1,5 for candies with a even candy_id

    price = 1.5 if candy_id % 2 == 0 else 1

    return (datetime.datetime.now().strftime("%c"), price)


# now, let's simulate 20 customers in your show.
# They are asking for candy with id 2 and candy with id 3...
for i in range(0,20):
    print(get_candy_price(2))
    print(get_candy_price(3))