dyne 1.0.7

A light weight Python async framework with batteries included.

A light weight Python async framework with batteries included

import dyne

api = dyne.API()

@api.route("/create", methods=["POST"])
@api.authenticate(basic_auth, role="user")
@api.input(BookCreateSchema, location="form")
@api.output(BookSchema)
@api.expect(
    {
        401: "Invalid credentials",
    }
)
async def create(req, resp, *, data):
    """Create book"""

    image = data.pop("image")
    await image.save(image.filename)  # File already validated for extension and size.

    book = Book(**data, cover=image.filename)
    session.add(book)
    session.commit()

    resp.obj = book

if __name__ == "__main__":
  api.run()

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This gets you a ASGI app, with a production static files server pre-installed, jinja2 templating (without additional imports), and a production webserver based on uvloop, serving up requests with gzip compression automatically.

More Examples

See the documentation's feature tour for more details on features available in dyne.

Installing dyne

Install the stable release:

pip install dyne

The Basic Idea

The primary concept here is to bring the niceties that are brought forth from both Flask and Falcon and unify them into a single framework, along with some new ideas I have. I also wanted to take some of the API primitives that are instilled in the Requests library and put them into a web framework. So, you'll find a lot of parallels here with Requests.

• Setting resp.content sends back bytes.
• Setting resp.text sends back unicode, while setting resp.html sends back HTML.
• Setting resp.media sends back JSON/YAML (.text/.html/.content override this).
• Setting resp.obj deserializes SQLAlchemy object(s) using Pydantic or Marshmallow schemas
• Case-insensitive req.headers dict (from Requests directly).
• resp.status_code, req.method, req.url, and other familiar friends.

Ideas

• Flask-style route expression, with new capabilities -- all while using Python 3.6+'s new f-string syntax.
• I love Falcon's "every request and response is passed into to each view and mutated" methodology, especially response.media, and have used it here. In addition to supporting JSON, I have decided to support YAML as well, as Kubernetes is slowly taking over the world, and it uses YAML for all the things. Content-negotiation and all that.
• A built in testing client that uses the actual Requests you know and love.
• The ability to mount other WSGI apps easily.
• Automatic gzipped-responses.
• In addition to Falcon's on_get, on_post, etc methods, dyne features an on_request method, which gets called on every type of request, much like Requests.
• A production static file server is built-in.
• Uvicorn built-in as a production web server. I would have chosen Gunicorn, but it doesn't run on Windows. Plus, Uvicorn serves well to protect against slowloris attacks, making nginx unnecessary in production.
• GraphQL support, via Graphene. The goal here is to have any GraphQL query exposable at any route, magically.
• Provide an official way to run webpack.