Today we want to share our brand new Python library providing ultra-lightweight durable execution.

https://github.com/dbos-inc/dbos-transact-py

Durable execution means your program is resilient to any failure. If it is ever interrupted or crashes, all your workflows will automatically resume from the last completed step. If you want to see durable execution in action, check out this demo app:

https://demo-widget-store.cloud.dbos.dev/

Or if you’re like me and want to skip straight to the Python decorators in action, here’s the demo app’s backend – an online store with reliability and correctness in just 200 LOC:

https://github.com/dbos-inc/dbos-demo-apps/blob/main/python/...

Don't want to keep reading and just try it out:

https://console.dbos.dev/launch

No matter how many times you try to crash it, it always resumes from exactly where it left off! And yes, that button really does crash the app.

Under the hood, this works by storing your program's execution state (which workflows are currently executing and which steps they've completed) in a Postgres database. So all you need to use it is a Postgres database to connect to—there's no need for a "workflow server." This approach is also incredibly fast, for example 25x faster than AWS Step Functions.

Some more cool features include:

* Scheduled jobs—run your workflows exactly-once per time interval, no more need for cron.

* Exactly-once event processing—use workflows to process incoming events (for example, from a Kafka topic) exactly-once. No more need for complex code to avoid repeated processing

* Observability—all workflows automatically emit OpenTelemetry traces.

Docs: https://docs.dbos.dev/

Examples: https://docs.dbos.dev/examples

We also have a webinar on Thursday where we will walk through the new library, you can sign up here: https://www.dbos.dev/webcast/dbos-transact-python

We'd love to hear what you think! We’ll be in the comments for the rest of the day to answer any questions you may have.