Persistent, Stale-Free Caching for Python Functions

Cachier is a Python library that provides persistent, stale-free memoization decorators for Python functions. It supports various storage backends including local filesystem (pickle), in-memory, MongoDB, Redis, SQL, and S3, offering configurable cache expiration and automatic invalidation. The library is actively maintained with frequent releases, currently at version 4.2.0, and supports both synchronous and asynchronous functions.