It's sad the difference between expiry and eviction isn't explored more fully. There are plenty of posts describing cache eviction strategies that barely touch

It's sad the difference between expiry and eviction isn't explored more fully. There are plenty of posts describing cache eviction strategies that barely touch on expiry issues, and a handful of posts about cache expiry that barely touch on eviction. Regarding the decorators, there's a reason it's popular: it saves boilerplate. The good news is that it's python, so you can do something like this: from pyappcache import RedisCache @RedisCache def get_slow_thing_v3(thing_id): thing = get_slow_thing_from_a_database_layer() return thing def update_something_slow(thing_id, new_thing): get_slow_thing_v3.set_cache(thing_id, new_thing) set_thing_in_a_database_layer(new_thing)