Can One Replace or Remove a specific key from functools.lru_cache?

Question

I'm using a functools.lru_cache to serve temp file paths given certain input^*. However in case the path no longer exists, I would like to remove/replace the single corresponding key. The cache_clear() method would be overkill and cache_info() do not appear to help.

Thanks for your help!

^* The method being cached streams a fileobj from S3 to a local temp file.

Answer 1

This was requested via a python.org issue allow to cache_clear(some_key) in lru_cache and rejected. So there is no method in lru_cache that clears a specific entry.

There is an excellent suggestion linked from that issue to implement your own variant using collections.OrderedDict called Foundation for rolling your own LRU cache variants.