simple cache

simple_cache.py

from time import sleep

cache = dict()


def get_data():
    if not cache.get("items"):
        sleep(10)  # simulates waiting for data
        items = ["a", "b", "c"]
        cache["items"] = items
    return cache["items"]


def main():
    print(get_data())  # takes 10 seconds
    print(get_data())  # takes almost no time
    print(get_data())  # takes almost no time


if __name__ == '__main__':
    exit(main())