Python functools.lru_cache with timeout and passing lru_cache kwargs

timed_cache_helper.py

import functools
import datetime


def timed_cache(maxsize=128, typed=False, **timedelta_kwargs):
    def _wrapper(f):
        update_delta = datetime.timedelta(**timedelta_kwargs)
        next_update = datetime.datetime.utcnow() - update_delta
        # Apply @lru_cache to f with no cache size limit
        f = functools.lru_cache(maxsize=maxsize, typed=typed)(f)

        @functools.wraps(f)
        def _wrapped(*args, **kwargs):
            nonlocal next_update
            now = datetime.datetime.utcnow()
            if now >= next_update:
                f.cache_clear()
                next_update = now + update_delta
            return f(*args, **kwargs)

        return _wrapped

    return _wrapper