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a little task queue for python

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a lightweight alternative.

huey is:

  • a task queue (2019-04-01: version 2.0 released <>_)
  • written in python (2.7+, 3.4+)
  • clean and simple API
  • redis, sqlite, file-system, or in-memory storage
  • example code <>_.
  • read the documentation <>_.

huey supports:

  • multi-process, multi-thread or greenlet task execution models
  • schedule tasks to execute at a given time, or after a given delay
  • schedule recurring tasks, like a crontab
  • automatically retry tasks that fail
  • task prioritization
  • task result storage
  • task expiration
  • task locking
  • task pipelines and chains

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At a glance

.. code-block:: python

from huey import RedisHuey, crontab

huey = RedisHuey('my-app', host='')

def add_numbers(a, b):
    return a + b

@huey.task(retries=2, retry_delay=60)
def flaky_task(url):
    # This task might fail, in which case it will be retried up to 2 times
    # with a delay of 60s between retries.
    return this_might_fail(url)

@huey.periodic_task(crontab(minute='0', hour='3'))
def nightly_backup():

Calling a task-decorated function will enqueue the function call for execution by the consumer. A special result handle is returned immediately, which can be used to fetch the result once the task is finished:

.. code-block:: pycon

>>> from demo import add_numbers
>>> res = add_numbers(1, 2)
>>> res
<Result: task 6b6f36fc-da0d-4069-b46c-c0d4ccff1df6>

>>> res()

Tasks can be scheduled to run in the future:

.. code-block:: pycon

>>> res = add_numbers.schedule((2, 3), delay=10)  # Will be run in ~10s.
>>> res(blocking=True)  # Will block until task finishes, in ~10s.

For much more, check out the guide <>_ or take a look at the example code <>_.

Running the consumer ^^^^^^^^^^^^^^^^^^^^

Run the consumer with four worker processes:

.. code-block:: console

$ my_app.huey -k process -w 4

To run the consumer with a single worker thread (default):

.. code-block:: console

$ my_app.huey

If your work-loads are mostly IO-bound, you can run the consumer with threads or greenlets instead. Because greenlets are so lightweight, you can run quite a few of them efficiently:

.. code-block:: console

$ my_app.huey -k greenlet -w 32


Huey's design and feature-set were informed by the capabilities of the Redis <>_ database. Redis is a fantastic fit for a lightweight task queueing library like Huey: it's self-contained, versatile, and can be a multi-purpose solution for other web-application tasks like caching, event publishing, analytics, rate-limiting, and more.

Although Huey was designed with Redis in mind, the storage system implements a simple API and many other tools could be used instead of Redis if that's your preference.

Huey comes with builtin support for Redis, Sqlite and in-memory storage.


See Huey documentation <>_.

Project page

See source code and issue tracker on Github <>_.

Huey is named in honor of my cat:

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