justscheduleit 0.2.0

Simple in-process task scheduler for Python apps

JustScheduleIt

Simple in-process task scheduler for Python apps.

Use it if:

• you need to schedule background tasks in the same process, like to update a shared dataframe every hour from S3

Take something else if:

• you need to schedule persistent/distributed tasks, that should be executed in a separate process (take a look at Celery)

Usage

Just schedule a task

from datetime import timedelta

from justscheduleit import Scheduler, every, run

scheduler = Scheduler()


@scheduler.task(every(timedelta(minutes=1), delay=(0, 10)))
def task():
    print("Hello, world!")


run(scheduler)

sync and async tasks

The scheduler supports both sync and async functions. A sync function will be executed in a separate thread, using anyio.to_thread.run_sync(), so it won't block the scheduler (other tasks).

(Advanced) Hosting

Scheduler is built around Host abstraction. A host is a supervisor that runs 1 or more services, usually as the application entry point.

A scheduler itself is a hosted service. The default justscheduleit.run() internally just creates a host with one service, the passed scheduler, and runs it.