---
description: We are changing how Python Workers are structured by default.
title: Python Workers handlers now live in an entrypoint class
image: https://developers.cloudflare.com/changelog/post/2025-08-14-new-python-handlers/og.png?v=4ad4a819f2aa8a32
---

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August 14, 2025

## Python Workers handlers now live in an entrypoint class

[Workers](https://developers.cloudflare.com/workers/)

Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/changelog/post/2025-08-14-new-python-handlers/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/)

We are changing how Python Workers are structured by default. Previously, handlers were defined at the top-level of a module as `on_fetch`, `on_scheduled`, etc. methods, but now they live in an entrypoint class.

Here's an example of how to now define a Worker with a fetch handler:

```python
from workers import Response, WorkerEntrypoint

class Default(WorkerEntrypoint):
    async def fetch(self, request):
        return Response("Hello World!")
```

To keep using the old-style handlers, you can specify the `disable_python_no_global_handlers` compatibility flag in your wrangler file:

```jsonc
{
	"compatibility_flags": [
		"disable_python_no_global_handlers"
	]
}
```

```toml
compatibility_flags = [ "disable_python_no_global_handlers" ]
```

Consult the [Python Workers documentation](https://developers.cloudflare.com/workers/languages/python/) for more details.

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