Asyncz

🚀 The scheduler that simply works. 🚀

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Documentation: https://asyncz.dymmond.com 📚

Source Code: https://github.com/dymmond/asyncz

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Asyncz is an async-first scheduler for Python applications and ASGI services. It wraps the core APScheduler model in a codebase that is focused on asyncio, explicit task objects, pluggable stores and executors, and framework-friendly lifecycle integration.

Documentation: https://asyncz.dymmond.com

Highlights

• AsyncIOScheduler and NativeAsyncIOScheduler for async runtimes.
• Built-in triggers for date, interval, cron, and, or, and shutdown.
• Built-in stores for memory, file, mongodb, redis, and sqlalchemy.
• Executors for in-event-loop work, thread pools, process pools, and direct debug execution.
• CLI commands for starting schedulers and managing persisted tasks.
• Task inspection snapshots and filtered task queries for dashboards, CLIs, and admin tooling.
• Optional dashboard UI for browsing tasks, filtering by schedule metadata, and viewing captured logs.
• Standard-library logging throughout the project.

Installation

pip install asyncz

Useful extras:

pip install "asyncz[dashboard]"
pip install "asyncz[localtime]"

Quick start

import logging

from asyncz.schedulers import AsyncIOScheduler

logging.basicConfig(level=logging.INFO)

scheduler = AsyncIOScheduler()


def cleanup() -> None:
    logging.getLogger(__name__).info("cleanup finished")


scheduler.add_task(cleanup, "interval", minutes=5, id="cleanup-task")
scheduler.start()

Core concepts

Asyncz is built around four main component types:

• Schedulers
• Triggers
• Stores
• Executors

Tasks are the public unit of scheduling. A task combines a callable, a trigger, an executor alias, and the metadata needed to persist and reschedule it correctly.

Logging

Asyncz uses Python's built-in logging module. The default logger namespaces are:

• asyncz.schedulers
• asyncz.executors.<alias>
• asyncz.stores.<alias>

If you need custom logger creation, pass your own loggers_class to the scheduler. That class only needs to implement the same dictionary-like contract used by ClassicLogging.

ASGI integration

Asyncz can wrap an ASGI app directly:

from asyncz.schedulers import AsyncIOScheduler

scheduler = AsyncIOScheduler()
application = scheduler.asgi(application)

Or you can wire startup and shutdown hooks manually:

from asyncz.schedulers import AsyncIOScheduler

scheduler = AsyncIOScheduler()

app = Lilya(
    routes=[...],
    on_startup=[scheduler.start],
    on_shutdown=[scheduler.shutdown],
)

The scheduler also supports synchronous and asynchronous context managers, which makes it easy to use inside lifespan handlers.

Persistent stores and encryption

The default store is in-memory. For durable scheduling, configure a file, MongoDB, Redis, or SQLAlchemy store.

Persistent stores support the ASYNCZ_STORE_ENCRYPTION_KEY environment variable. When it is set, task payloads are encrypted before they are written to the backing store.

CLI and dashboard

Asyncz ships with:

• a CLI for start, add, list, run, pause, resume, and remove
• a Lilya-based dashboard with task controls, task filters, and a log viewer

See the documentation for usage details:

• CLI guide
• Dashboard guide