pst-updater.py

from aiohttp import web, ClientSession as UA
import asyncio as A
import sys, os


def update(data: bytes):
    path = __file__
    with open(path, mode='wb') as f:
        f.write(data)
        print('Updated')

    print(sys.executable)
    print(sys.argv)
    os.execl(sys.executable, *sys.argv)


async def update_svc(_app):
    while True:
        await A.sleep(1)
        async with UA() as ua:
            async with ua.get('https://gist.githubusercontent.com/koi8-r/59f0d170414e7c86b56444ab7c9264e3/raw/a19447a8451c2974626ecb819b8c50389b53e196/pst-updater.py') as resp:
                script: bytes = await resp.read()
                update(script)


async def start_background_tasks(app):
    app['update_svc'] = A.create_task(update_svc(app))


async def stop_background_tasks(app):
    app['update_svc'].cancel()
    await app['update_svc']


async def index(req: web.Request):
    return web.Response(text='Home')


app = web.Application()

app.on_startup.append(start_background_tasks)
app.on_cleanup.append(stop_background_tasks)

app.get('/', index)

web.run_app(app)