aion

Async job scheduling for Python, powered by Rust’s Tokio runtime.

aion lets you schedule and run asynchronous jobs in Python with Rust-level performance. It bridges Python’s asyncio world with Rust’s high-performance Tokio runtime — giving you a faster, safer way to execute async tasks, periodic jobs, and cron-like schedules.

✨ Features

• 🚀 Powered by Rust Tokio — concurrency with minimal overhead
• 🧩 Python async compatible — runs within existing asyncio loops
• ⏰ Job scheduling — supports delayed, periodic, and cron-style scheduling
• 🔄 Thread-safe — Rust-backed atomic control and synchronization
• 🧠 Lightweight — no background daemon or external broker required

📦 Installation

Install directly from PyPI (once published):

pip install aion-scheduler

## 🧠 Quick Start

Here’s a simple example showing how to schedule async jobs using aion.

```python
import asyncio
from datetime import timedelta
from aion import Scheduler, Trigger

async def hello():
    print("Hello from Aion!")

async def main():
    scheduler = Scheduler()

    # Run every 1 second
    await scheduler.schedule(handler=hello, trigger=Trigger.Interval(timedelta(seconds=1)))

    # Run immediately
    await hello()

    # Keep the scheduler running
    await scheduler.start()

asyncio.run(main())

Cron expressions

You can also schedule jobs using cron-like syntax:

import asyncio
from aion import Scheduler, Trigger

async def report():
    print("Generating report...")

async def main():
    scheduler = Scheduler()
    await scheduler.schedule(handler=report, trigger=Trigger.Cron("0 * * * *"))  # Run every hour
    await scheduler.start()

asyncio.run(main())

⚙️ API Overview

🧪 Testing

aion uses pytest and pytest-asyncio.

Run all tests:

uv run pytest -v

🛠️ Developer Guide

To rebuild the Python extension:

uv sync --reinstall # rebuild the rust lib and loads it into venv

To check the Rust code:

cargo check
cargo test

To format code:

cargo fmt
ruff check . --fix

Directory structure

aion/
├── src/              # Rust sources
├── aion/             # Python module
├── examples/         # Usage examples
├── tests/            # Python tests
├── Cargo.toml        # Rust dependencies
└── pyproject.toml    # Python packaging

📄 License

Copyright © 2025 Balaena Quant

All rights reserved. This is a proprietary and confidential work. Unauthorized use, duplication, or distribution is prohibited.

🌌 Why “Aion”?

In ancient Greek, Aion represents eternal time — the endless flow that powers all things. This library brings that concept to async programming: efficient, perpetual scheduling powered by Rust.