arq

What it does

Async execution

It uses asyncio to enqueue and execute jobs without blocking and can run multiple jobs concurrently as asyncio tasks.checked 9 Oct 2026

Blocking work

The docs recommend running functions that block the event loop for extended periods in a ThreadPoolExecutor or ProcessPoolExecutor.checked 9 Oct 2026

Concurrency

It uses asyncio Tasks to run multiple jobs simultaneously, potentially hundreds.checked 9 Oct 2026

Current version

The documentation lists v0.28.0 as the current version.checked 9 Oct 2026

Distribution

PyPI provides arq as a source distribution and a platform-independent Python 3 wheel.checked 9 Oct 2026

Execution behavior

If a worker shuts down during a job, the job remains queued to run again, so jobs may be called more than once and should tolerate repetition.checked 9 Oct 2026

Install

The documentation says to install arq with `pip install arq`.checked 9 Oct 2026

Installation

The documentation gives `pip install arq` as the installation command.checked 9 Oct 2026

Intended audience

PyPI classifies the project for developers, information technology, and system administrators.checked 9 Oct 2026

Job results

The Job instance can provide job information, status, and results.checked 9 Oct 2026

Job uniqueness

Custom job IDs prevent a job with that ID from being enqueued again until its execution finishes and its result clears.checked 9 Oct 2026

License

The PyPI project page lists the MIT License.checked 9 Oct 2026

Maintenance status

The PyPI project page says arq is in maintenance only mode.checked 9 Oct 2026

Project author

PyPI credits Samuel Colvin as the author.checked 9 Oct 2026

Purpose

arq provides job queues and RPC in Python using asyncio and Redis.checked 9 Oct 2026

Python requirement

The PyPI project page lists Python >=3.9 as required.checked 9 Oct 2026

Redis connection

The docs say the default Redis connection is localhost:6379 with no password.checked 9 Oct 2026

Redis dependency

arq uses Redis; the documented default connection is localhost:6379 with no password.checked 9 Oct 2026

Retries

Jobs can be retried, including by raising the Retry exception from within a job.checked 9 Oct 2026

Scheduling

Jobs can be deferred until a specified time or duration, and functions can be scheduled as cron jobs.checked 9 Oct 2026

Scheduling and retries

Jobs can be deferred until a duration or specific time, and jobs can be retried.checked 9 Oct 2026

Uniqueness

Custom job IDs can prevent a job from being enqueued again while its execution is unfinished and its result remains available.checked 9 Oct 2026

What it does

arq provides job queues and RPC in Python using asyncio and Redis.checked 9 Oct 2026