tasks.py

from time import sleep
from celery import Celery, shared_task
from asyncio import sleep
from asgiref.sync import async_to_sync
import asyncio


app = Celery("tasks", backend="rpc://", broker="pyamqp://guest@localhost//")


@app.task
def reverse_string(my_string: str):
    return my_string[::-1]


@app.task(bind=True)
def add(self, x, y):
    # Your actual async function
    async def async_add(x, y):
        return x + y

    loop = asyncio.get_event_loop()

    # If there's no running loop, we will create a new one and close it after the task
    if loop.is_closed():
        loop = asyncio.new_event_loop()
        asyncio.set_event_loop(loop)
        try:
            result = loop.run_until_complete(async_add(x, y))
        finally:
            loop.close()
    else:
        result = loop.run_until_complete(async_add(x, y))

    return result