pyramid with mypy

hello.py

from pyramid.config import Configurator
from pyramid.interfaces import IRequest, IResponse
from abc import ABC


class IHelloContext(ABC):
    """ resource of hello """

    message: str


class HelloContext(IHelloContext):

    def __init__(self, message: str) -> None:
        self.message = message


class HelloView:
    def __init__(self, context: IHelloContext, request: IRequest) -> None:
        self.context = context
        self.request = request

    def __call__(self) -> IResponse:
        self.request.response.text = "message: %s" % self.context.message
        return self.request.response


def main(port: int) -> None:
    import waitress

    config = Configurator()
    config.set_root_factory(lambda request: HelloContext("Hello, world!"))
    config.add_view(HelloView)
    app = config.make_wsgi_app()
    waitress.serve(app, port=port)


if __name__ == "__main__":
    import argparse

    parser = argparse.ArgumentParser()
    parser.add_argument("-p", "--port", type=int, default=8080)
    args = parser.parse_args()
    main(args.port)