[QUESTION] Any plan to suppprt BackgroundTask from Starlette?

Starlette allows to attach a list of background tasks to a response, that will run only once the response has been sent. If the task is a not a coroutine is it executed on a specific executor to not block the event loop.

    if task.is_coroutine():
        future = asyncio.ensure_future(task())
    else:
        loop = asyncio.get_event_loop()
        future = await loop.run_in_executor(None, task.func)

Is there any possibility to add this great feature to Fastai ?

[tiangolo]

@madkote if your processing is in an async function (let’s say, created with async def process_something(): ...), you can use an async function for your path operation too, and inside of it, use await process_something().

from starlette.concurrency import run_in_threadpool

@app.get("/items"/)
async def read_items():
    result = await process_something("argument 1", keyword_arg2="keyword argument")
    return result

If it’s a normal function, you can use run_in_threadpool from Starlette, pass your standard function and await it, something like:

from starlette.concurrency import run_in_threadpool

@app.get("/items"/)
async def read_items():
    result = await run_in_threadpool(process_something, "argument 1", keyword_arg2="keyword argument")
    return result

If that doesn’t solve your problem, please create a new issue for it so we can continue the discussion there.

---

As the original issue should be solved now with the support for BackgroundTasks, I’ll close it now. But feel free to add more comments or create new issues.

[outofnames]

@tiangolo thanks for the reply, I ended up adding more features to my project just to justify celery 😄