python-lru_cache-每日自动清理缓存

from functools import wraps
import logging
import utils.date_utils as date_utils


class TodayCacheManager(object):
    _date_pattern = '%Y-%m-%d'
    _today = date_utils.now_date_str('%Y-%m-%d')

    @staticmethod
    def is_today() -> bool:
        return TodayCacheManager._today == date_utils.now_date_str(TodayCacheManager._date_pattern)

    @staticmethod
    def reset_today():
        TodayCacheManager._today = date_utils.now_date_str(TodayCacheManager._date_pattern)

    @staticmethod
    def clear_cache_if_not_today(func):
        if not TodayCacheManager.is_today():
            func.cache_clear()
            TodayCacheManager.reset_today()
            logging.log(logging.INFO, f'Cache cleared for {func}')


def daily_cache_manager(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        TodayCacheManager.clear_cache_if_not_today(func)
        return func(*args, **kwargs)

    return wrapper

def now_date_str(pattern):
    return datetime.date.today().strftime(pattern)

@daily_cache_manager
@lru_cache(maxsize=10000, typed=True)
def func_xxx(param1, param2, param3):

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同样的思路，可以扩展为自定义的清理规则