Muffin – fast, lightweight, and asynchronous ASGI web framework for Python 3.10+.

Muffin combines the simplicity of microframeworks with native ASGI performance, supporting multiple async libraries (Asyncio, Trio, Curio) out of the box. Its rich plugin ecosystem makes building modern web applications pleasant and efficient.

• ASGI compatible
• Competitive performance ([Benchmarks](http://klen.github.io/py-frameworks-bench/))
• Supports Asyncio, Trio, and Curio
• Multiple response types: text, HTML, JSON, streams, files, SSE, WebSockets
• First-class plugin system for templating, databases, auth, and more

Muffin requires Python 3.10 or newer. We recommend using the latest stable Python.

Install via pip:

$ pip install muffin

For the standard installation with gunicorn, uvicorn, uvloop, httptools:

$ pip install muffin[standard]

These packages will be installed automatically:

• ASGI-Tools – ASGI toolkit
• Modconfig – hierarchical configuration manager

Create a simple "Hello User" app:

import muffin

app = muffin.Application()

@app.route('/', '/hello/{name}')
async def hello(request):
    name = request.path_params.get('name', 'world')
    return f'Hello, {name.title()}!'

Save this as example.py and run:

$ uvicorn example:app

Visit http://localhost:8000 or http://localhost:8000/hello/username in your browser.

Muffin has a rich ecosystem of plugins:

• [muffin-jinja2](https://github.com/klen/muffin-jinja2) – Jinja2 templates (asyncio/trio/curio)
• [muffin-session](https://github.com/klen/muffin-session) – Signed cookie-based HTTP sessions
• [muffin-oauth](https://github.com/klen/muffin-oauth) – OAuth integration
• [muffin-sentry](https://github.com/klen/muffin-sentry) – Sentry error tracking
• [muffin-peewee](https://github.com/klen/muffin-peewee-aio) – Peewee ORM integration
• [muffin-babel](https://github.com/klen/muffin-babel) – i18n support
• [muffin-databases](https://github.com/klen/muffin-databases) – SQL database support
• [muffin-mongo](https://github.com/klen/muffin-mongo) – MongoDB integration
• [muffin-rest](https://github.com/klen/muffin-rest) – REST API utilities
• [muffin-redis](https://github.com/klen/muffin-redis) – Redis integration
• [muffin-admin](https://github.com/klen/muffin-admin) – Auto-generated admin UI
• [muffin-prometheus](https://github.com/klen/muffin-prometheus) – Prometheus metrics exporter

See each repo for usage and installation instructions.

Performance comparisons are available at: http://klen.github.io/py-frameworks-bench/

Found a bug or have a feature request? Please open an issue at: https://github.com/klen/muffin/issues

Contributions are welcome! Please see [CONTRIBUTING.md](https://github.com/klen/muffin/blob/develop/CONTRIBUTING.md) for guidelines.

Muffin is licensed under the MIT license.

Muffin > 0.40 (completely rewritten on ASGI)

• Kirill Klenov

Muffin < 0.40 (based on AIOHTTP_)

• Kirill Klenov
• Andrew Grigorev
• Diego Garcia