functools.cache

코드

import contextlib
import functools
import time


@contextlib.contextmanager
def timer():
    start = time.time()
    yield
    end = time.time()
    elapsed = round(end - start, 3)
    print(f"{elapsed=}s")


@functools.cache
def sleep(n):
    time.sleep(n)


with timer():
    sleep(2)

with timer():
    sleep(2)

 

결과

elapsed=2.004s
elapsed=0.0s

 

참고

https://pub.towardsai.net/20-underdog-python-built-in-libraries-that-deserve-much-more-attention-6ff35baeb06c

20 Underdog Python Built-in Libraries That Deserve Much More Attention