Lessweb is a ready-to-use, production-grade Python web framework with the following goals:

• Ready-to-use: Easily parse configuration files, set up logging with ease, and dynamically override configuration items using environ variables.
• Production-grade: Built on the aiohttp ecosystem and boast powerful IOC capabilities.
• Pythonic: Support for the latest python version and the latest python syntax.

To install the latest lessweb for Python≥3.10, please run:

pip install lessweb

• aiohttp
• orjson
• pydantic
• python-dotenv

Save the code below in file main.py:

from typing import Annotated

from lessweb import Bridge
from lessweb.annotation import Get


async def hello(*, who: str = 'world') -> Annotated[dict, Get('/')]:
    return {'message': f'Hello, {who}!'}


def main():
    bridge = Bridge()
    bridge.scan(hello)
    bridge.run_app()


if __name__ == '__main__':
    main()

Start the application with the command below, it listens on http://localhost:8080 by default.

python main.py

Open your browser at http://localhost:8080

You will see the JSON response as:

{"message":"Hello, world!"}

Open your browser at http://127.0.0.1:8000?who=John

You will see the JSON response as:

{"message":"Hello, John!"}

Lessweb is offered under the Apache 2 license.

The latest developer version is available in a GitHub repository: https://github.com/lessweb/lessweb