Celery and django. How to make tasks "synchronous"?

Question

Django

There is a jang website that needs to parse the price, I did it on celery, created two tasks, one for parsing the price itself (relatively fast) and the second for downloading pictures (long, because the pictures are in a large archive). Is it now possible to do without special crutches so that tasks of the same type are performed in turn, i.e. if you uploaded 2 price lists, did he parse the first one first, and then the second one?
I start the task from the save method of the model that stores the tasks.parseXml.delay(path_to_file) file, maybe not the best way, but it works :)

Answer 1

docs.celeryproject.org/en/latest/userguide/canvas.html

Answer 2

Is it now possible to do without special crutches so that tasks of the same type are performed in turn, i.e. if you uploaded 2 price lists, did he parse the first one first, and then the second one?

Put jobs in the same queue

@celery_app.task(
queue="price_queue"
)
def do_parsing():
...

And run the worker itself like this:
But what's the point in this ...