A closer look at Python Workflows, now in beta

Developers can already use Cloudflare Workflows to build long-running, multi-step applications on Workers. Now, Python Workflows are here, meaning you can use your language of choice to orchestrate multi-step applications.

With Workflows, you can automate a sequence of idempotent steps in your application with built-in error handling and retry behavior. But Workflows were originally supported only in TypeScript. Since Python is the de facto language of choice for data pipelines, artificial intelligence/machine learning, and task automation – all of which heavily rely on orchestration – this created friction for many developers.

Over the years, we’ve been giving developers the tools to build these applications in Python, on Cloudflare. In 2020, we brought Python to Workers via Transcrypt before directly integrating Python into workerd in 2024. Earlier this year, we built support for CPython along with any packages built in Pyodide, like matplotlib and pandas, in Workers. Now, Python Workflows are supported as well, so developers can create robust applications using the language they know best.

Imagine you’re training an LLM. You need to label the dataset, feed data, wait for the model to run, evaluate the loss, adjust the model, and repeat. Without automation, Continue reading