Sanic | Build fast. Run fast.

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Sanic is a Python 3.7+ web server and web framework that's written to go fast. It allows the usage of the async/await syntax added in Python 3.5, which makes your code non-blocking and speedy.

Sanic is also ASGI compliant, so you can deploy it with an alternative ASGI webserver.

Source code on GitHub | Help and discussion board | User Guide | Chat on Discord

The project is maintained by the community, for the community. Contributions are welcome!

The goal of the project is to provide a simple way to get up and running a highly performant HTTP server that is easy to build, to expand, and ultimately to scale.

Sponsor

Check out open collective to learn more about helping to fund Sanic.

Thanks to Linode for their contribution towards the development and community of Sanic.

Installation

pip3 install sanic

Sanic makes use of uvloop and ujson to help with performance. If you do not want to use those packages, simply add an environmental variable SANIC_NO_UVLOOP=true or SANIC_NO_UJSON=true at install time.

$ export SANIC_NO_UVLOOP=true
$ export SANIC_NO_UJSON=true
$ pip3 install --no-binary :all: sanic

Note

If you are running on a clean install of Fedora 28 or above, please make sure you have the redhat-rpm-config package installed in case if you want to use sanic with ujson dependency.

Note

Windows support is currently "experimental" and on a best-effort basis. Multiple workers are also not currently supported on Windows (see Issue #1517), but setting workers=1 should launch the server successfully.

Hello World Example

from sanic import Sanic
from sanic.response import json

app = Sanic("my-hello-world-app")

@app.route('/')
async def test(request):
    return json({'hello': 'world'})

if __name__ == '__main__':
    app.run()

Sanic can now be easily run using sanic hello.app.

[2018-12-30 11:37:41 +0200] [13564] [INFO] Goin' Fast @ http://127.0.0.1:8000
[2018-12-30 11:37:41 +0200] [13564] [INFO] Starting worker [13564]

And, we can verify it is working: curl localhost:8000 -i

HTTP/1.1 200 OK
Connection: keep-alive
Keep-Alive: 5
Content-Length: 17
Content-Type: application/json

{"hello":"world"}

Now, let's go build something fast!

Minimum Python version is 3.7. If you need Python 3.6 support, please use v20.12LTS.

Documentation

User Guide and API Documentation.

Changelog

Release Changelogs.

Questions and Discussion

Ask a question or join the conversation.

Contribution

We are always happy to have new contributions. We have marked issues good for anyone looking to get started, and welcome questions on the forums. Please take a look at our Contribution guidelines.