cachier_decorator_persistent_memoization_with_stale_cache.py

1import time
2from cachier import cachier
3import datetime
4
5@cachier(stale_after=datetime.timedelta(days=3))
6def expensive_function(arg1, arg2):
7    """A dummy function that takes a long time to run."""
8    print(f"Executing with {arg1} and {arg2}...")
9    time.sleep(2)
10    return arg1 + arg2
11
12# First run: will take 2 seconds
13print(expensive_function(2, 3))
14
15# Second run: will be instantaneous (returned from cache)
16print(expensive_function(2, 3))