Periodic tasks with Celery Beat in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import Celery in a Flask app.

Flask

from celery import [1]

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Acelery_app

Bcelery

CCeleryApp

DCelery

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'celery' which is incorrect.

Using names like 'CeleryApp' which do not exist.

The Celery class is imported with a capital C as Celery.

2fill in blank

medium

Complete the code to create a Celery instance with Flask app name.

Flask

celery = Celery([1])

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Aapp

B'myapp'

C'celery'

D'flaskapp'

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the Flask app object instead of its name as a string.

Using incorrect string names.

The Celery instance is created with the Flask app name as a string, e.g., 'myapp'.

3fill in blank

hard

Fix the error in the Celery configuration dictionary key for broker URL.

Flask

celery.conf.update({ 'broker_[1]': 'redis://localhost:6379/0' })

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Aurl

Buri

Caddress

Dlink

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'broker_uri' which is incorrect.

Using 'broker_address' or 'broker_link' which are invalid keys.

The correct key for the broker address is broker_url.

4fill in blank

hard

Fill both blanks to schedule a periodic task every 10 seconds using Celery Beat.

Flask

from celery.schedules import [1]
celery.conf.beat_schedule = {
    'task-every-10-seconds': {
        'task': 'tasks.my_task',
        'schedule': [2](10.0),
    },
}

Drag options to blanks, or click blank then click option'

Acrontab

Btimedelta

Cschedule

Dinterval

Attempts:

3 left

💡 Hint

Common Mistakes

Using crontab for seconds interval which is for cron-like schedules.

Using timedelta which is not a Celery schedule.

The interval schedule is used for periodic tasks every fixed seconds.

5fill in blank

hard

Fill all three blanks to define a Celery task function that prints 'Hello' every minute.

Flask

@celery.task
async def [1]():
    print([2])

celery.conf.beat_schedule = {
    'hello-every-minute': {
        'task': '[3]',
        'schedule': interval(60.0),
    },
}

Drag options to blanks, or click blank then click option'

Ahello_task

B'Hello'

D'hello_task'

Attempts:

3 left

💡 Hint

Common Mistakes

Using mismatched task names between function and schedule.

Forgetting quotes around the string to print.

The task function is named hello_task. The print statement prints the string 'Hello'. The task name in the schedule is the string 'hello_task'.