Celery - purge a specific queue using Redis from Python script

Question

I'm aware of Celery's command-line options:

celery -A my_app purge -Q queue_name

But I am looking for a way to purge queue_name from my Python app with Celery, something along the lines of:

def start_chunk(num_of_objs):
    # clear current queue before starting here
    RELEVANT CODE HERE TO PURGE queue_name
    for num in num_of_objcts:
         some_task.apply_async(kwargs={'num': num}, queue="queue_name")

Note, I'm aware of this:

from proj.celery import app
app.control.purge()

But as I understand this purges all queues .

Answer 1

I admit, it is little bit difficult to get it right. But the first thing you should look at for hints how to solve this problem is bin/purge.py (that is what I've done). After analysing the mentioned file, I think something like the following should work:

from celery.app.base import Celery
from yourproject import celery_app


def purge_queue(app: Celery, queue_name: str):
    with app.connection_for_write() as conn:
        conn.default_channel.queue_purge(queue_name)


purge_queue(celery_app, "celery")  # purge the "celery" queue

The above is more/less what celery -A yourproject.celery_app purge -Q celery does.

Answer 2

One way is to call the purge command through the os , we must use the -f flag:

import os
os.system("celery -A app_name purge -Q queue_name -f")

I don't know if there are any cons to this compared to DejanLekic's answer , which looks cleaner.