Idemkit library solves Python idempotency for retries and queues

Idemkit is a new open-source Python library that makes any operation safe to retry by handling idempotency correctly. It provides middleware for FastAPI, Flask, Django, queue consumers, and a decorator, with backends including Redis, Postgres, and DynamoDB. The library addresses common failure modes like race conditions, crash recovery, and key reuse, offering effectively-once guarantees.