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Asynchronous Slack API integration.

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aSlack is a lightweight, asynchronous wrapper for Slack’s Web and Real-Time Messaging (RTM) APIs, designed to allow the easy development of Slack tools and bots in Python. It defines two principal components:

  • SlackApi - a wrapper around the Web API; and
  • SlackBot - a messaging bot built on top of the RTM API.


aSlack uses asyncio with the async and await syntax, so is only compatible with Python versions 3.5 and above.


Asynchronous HTTP and WebSocket functionality is provided by aiohttp (version 0.15 and above required for out-of-the-box WebSocket client support).


aSlack’s documentation is available on PythonHosted.


aSlack is available through the Python Package Index, PyPI, you can install it with:

pip install aslack

Alternatively, clone or fork the repository and use e.g.:

python develop

to install locally for development. In this case, you should also install the development dependencies (ideally in a virtualenv) using:

pip install -r requirements.txt


The test suite can be run using py.test directly or by running:

python test

in which case pylint will also be run to check the code quality.

Additionally, a demo test for the Halliwell example can be run by setting the environment variable TMDB_API_TOKEN.


See the /examples directory for examples of the kinds of bots that you can build with aSlack.


Based on both aSlack and aTMDb, Halliwell is a bot that can provide information on movies or actors and find overlaps. Two environment variables, SLACK_API_TOKEN and TMDB_API_TOKEN, are required to run this example, and configuration for easy deployment to Cloud Foundry is provided.

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