Baldur is a Python framework that captures failed function calls when dependencies go down and automatically replays them upon recovery, using decorators to add circuit breakers, retry logic, and dead-letter queue functionality with built-in web console, metrics, and adapters for Django, FastAPI, Flask, and Celery.
FastAPI-Crons is a Python library that enables cron job scheduling directly within FastAPI applications using decorators, eliminating the need for separate worker processes. It supports async/sync functions, retries, timeouts, distributed locking, and persistent state management via multiple backends.