smurfix

from itertools import count
import signal

from async_generator import asynccontextmanager
import trio

async def monitor(self, task_status):
    with trio.catch_signals({signal.SIGTERM}) as signal_aiter:
        async with trio.open_nursery() as nursery:
            task_status.started(nursery)

smurfix

import asyncio

try:
    import curio
except ImportError:
    curio = None

try:
    import trio
except ImportError:

smurfix

This demonstrates that you can configure a Flask application through Flask-Script, without having to create a Flask instance or deal with circular dependencies. Note that Flask-Script's Manager accepts a factory function in place of a Flask app object.

Running:

python manage.py runserver

gives "Hello, world!" on http://localhost:5000/, while running:

python manage.py -c development.cfg runserver