Open source machine learning framework to automate text- and voice-based conversations: NLU, dialogue management, connect to Slack, Facebook, and more - Create chatbots and voice assistants
Python SDK for the development of custom actions for Rasa.
To install the SDK run
pip install rasa-sdk
|SDK version||compatible Rasa version|
|SDK version||compatible Rasa Core version|
Detailed instructions can be found in the Rasa Documentation about Custom Actions.
In order to start an action server using implemented custom actions,
you can use the available Docker image
Before starting the action server ensure that the folder containing
your actions is handled as Python module and therefore has to contain
a file called
Then start the action server using:
docker run -p 5055:5055 --mount type=bind,source=<ABSOLUTE_PATH_TO_YOUR_ACTIONS>,target=/app/actions \ rasa/rasa-sdk:<version>
The action server is then available at
To add custom dependencies you enhance the given Docker image, e.g.:
# Extend the official Rasa SDK image FROM rasa/rasa-sdk:<version> # Change back to root user to install dependencies USER root # To install system dependencies RUN apt-get update -qq && \ apt-get install -y <NAME_OF_REQUIRED_PACKAGE> && \ apt-get clean && \ rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* # To install packages from PyPI RUN pip install --no-cache-dir <A_REQUIRED_PACKAGE_ON_PYPI> # Switch back to non-root to run code USER 1001
Building from source
Rasa SDK uses Poetry for packaging and dependency management. If you want to build it from source, you have to install Poetry first. This is how it can be done:
curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python3
There are several other ways to install Poetry. Please, follow the official guide to see all possible options.
To install dependencies and
rasa-sdk itself in editable mode execute
To ensure a standardized code style we use the formatter black. If your code is not formatted properly, GitHub CI will fail to build.
If you want to automatically format your code on every commit, you can use pre-commit.
Just install it via
pip install pre-commit and execute
To check and reformat files execute
Steps to release a new version
Releasing a new version is quite simple, as the packages are build and distributed by GitHub Actions.
- Switch to the branch you want to cut the release from (
masterin case of a major / minor, the current release branch for patch releases).
- Create a PR against master or the release branch (e.g.
- Once your PR is merged, tag a new release (this SHOULD always happen on
master or release branches), e.g. using
git tag 1.2.0 -m "next release" git push origin 1.2.0GitHub Actions will build this tag and push a package to pypi.
- If this is a minor release, a new release branch should be created
pointing to the same commit as the tag to allow for future patch releases,
git checkout -b 1.2.x git push origin 1.2.x
Licensed under the Apache License, Version 2.0. Copyright 2020 Rasa Technologies GmbH. Copy of the license.
A list of the Licenses of the dependencies of the project can be found at the bottom of the Libraries Summary.
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