dura¶

dura is a small, SQLite-backed durable execution engine and worker pool for Python. One database file holds every task, run, checkpoint, event, wait, and durable key-value entry. Scheduled work survives crashes and restarts without a separate workflow server, message broker, or database cluster.

Installation¶

pip install dura

dura requires Python 3.13 or later and has zero runtime dependencies.

Where to start¶

• Tutorial: your first durable task: new to dura? Build a task, run it, crash it on purpose, and watch it pick up where it left off.
• Examples: polling an API, fanning out, and rescheduling: a complete, realistic script combining fan-out, checkpoints, durable state, events, and recurring scheduling in one program.
• How-to guides: already have a dura app running? Recipes for retries, checkpoints, events, durable state, priorities, worker pools, and health checks.
• Reference: the full API for DurableEngine, the worker pool, and the liveness heartbeat.
• Explanation: how the durability model actually works, and when dura is (and isn't) the right tool.