django-simple-task runs background tasks in Django 3 without requiring other services and workers. It runs them in the same event loop as your ASGI application. It is not resilient as a proper task runner such as Celery, but works for some simple tasks and has less overall overheads.

django-simple-task expect ASGI lifespan protocol to be supported by the server. Currently Daphne does not support this.

This package is tested with:

• Python 3.7, 3.8 and 3.9,
• Django 3.1 and 3.2.

Install the package:

pip install django-simple-task

Added it to installed apps:

# settings.py
INSTALLED_APPS = [
	...
	'django_simple_task'
]

Apply ASGI middleware :

# asgi.py
from django_simple_task import django_simple_task_middlware
application = django_simple_task_middlware(application)

Call a background task in Django view:

from django_simple_task import defer

def task1():
	time.sleep(1)
	print("task1 done")

async def task2():
	await asyncio.sleep(1)
	print("task2 done")

def view(requests):
	defer(task1)
	defer(task2)
	return HttpResponse(b"My View")

It is required to run Django with ASGI server. Official Doc

Concurrency level can be controlled by adding DJANGO_SIMPLE_TASK_WORKERS to settings. Defaults to 1.