XBlock
Purpose
XBlock is the Open edX component architecture for building courseware.
This repo contains the core code for implementing XBlocks. Open edX courseware is built out of components that are combined hierarchically. These include components like the video player, LON-CAPA problems, as well as compound components like learning sequences. The API for these components is called XBlocks.
How does this differ from existing industry standards like Learning Tools Interoperability (LTI) and SCORM? On a high level, XBlocks is a Python language-level API, and it provides sensible defaults for things like storing data. XBlocks could be wrapped up in LTI, and one could make an LTI XBlock. The core reason to write an XBlock is that it is deployable. You can give us the code to an XBlock, and we can embed it in our courseware. LTI would require you to give us a virtual machine image which ran it.
Getting Started
Developing
One Time Setup
First, clone the repository:
git clone git@github.com:openedx/XBlock.gitGo to the XBlock directory, set up a virtual environment using virtualenvwrapper with the same name as the repo and activate it:
cd XBlock
mkvirtualenv -p python3.12 XBlockEvery time you develop something in this repo
# Activate the virtualenv
workon XBlock
# Grab the latest code
git checkout master
git pull
# Install/update the dev requirements
make requirements
# Run the tests and quality checks (to verify the status before you make any changes)
make validate
# Make a new branch for your changes
git checkout -b <your_github_username>/<short_description>
# Using your favorite editor, edit the code to make your change.
vim ...
# Run your new tests
pytest ./path/to/new/tests
# Run all the tests and quality checks
make validate
# Commit all your changes
git commit ...
git push
# Open a PR and ask for review.Deploying
To package a new release:
Describe the release in CHANGELOG.rst
Update the __version__ number in xblock/__init__.py
Use the github release mechanism to release a new version. This will tag and publish the package.
Using the XBlock-SDK
The XBlock-SDK exists in a separate repository. The SDK contains useful tools for developing your own XBlocks, such as a template XBlock generator, sample XBlocks that demonstrate XBlock functionality.
You can find it in its own repository: https://github.com/openedx/xblock-sdk
Getting Help
Documentation
The docs for the XBlock API is on Read The Docs: https://docs.openedx.org/projects/xblock/en/latest/xblock-tutorial/index.html .
Reading the code
There are distinct layers to this code. In the docstrings, we’ve tried to make clear which layer the code lives in, though sometimes the lines are blurred:
XBlock The sample XBlock code. This is the most important, it is the code that most third parties will be writing, and demonstrates the XBlock interfaces.
Runtime The runtime code that we think will be common to all runtimes. This is the behind-the-scenes code edX will write to make XBlocks work. This layer may not be real code here, but we’ll need to write real code to perform these functions.
Making your own XBlock
Making an XBlock can be as simple as creating a Python class with a few specific methods.
Instructions for constructing a new XBlock along with examples can be found in the XBlock SDK.
More Help
If you’re having trouble, we have discussion forums at https://discuss.openedx.org where you can connect with others in the community.
Our real-time conversations are on Slack. You can request a Slack invitation, then join our community Slack workspace.
For anything non-trivial, the best path is to open an issue in this repository with as many details about the issue you are facing as you can provide.
https://github.com/openedx/XBlock/issues
For more information about these options, see the Getting Help page.
License
The code in this repository is licensed the Apache 2.0 license unless otherwise noted.
Please see LICENSE.txt for details.
Contributing
Contributions are very welcome!
Please read How To Contribute for details.
This project is currently accepting all types of contributions, bug fixes, security fixes, maintenance work, or new features. However, please make sure to have a discussion about your new feature idea with the maintainers prior to beginning development to maximize the chances of your change being accepted. You can start a conversation by creating a new issue on this repo summarizing your idea.
The Open edX Code of Conduct
All community members are expected to follow the Open edX Code of Conduct.
People
The assigned maintainers for this component and other project details may be found in Backstage. Backstage pulls this data from the catalog-info.yaml file in this repo.
Reporting Security Issues
Please do not report security issues in public. Please email security@openedx.org
Metadata
Release files for XBlock 6.3.5
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
|---|---|---|---|---|
| xblock-6.3.5.tar.gz | 1.2 MB | With provenance | Details for xblock-6.3.5.tar.gz |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Actions Reset |
|---|---|---|---|---|
| xblock-6.3.5-py3-none-any.whl | Python 3 | none | any | Details for xblock-6.3.5-py3-none-any.whl |
Total release size: 1.4 MB
Release files / xblock-6.3.5.tar.gz
| Download URL | xblock-6.3.5.tar.gz |
|---|---|
| Size | 1.2 MB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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BLAKE2b-256 checksum How to use checksums |
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| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.16
|
Provenance
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PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Nov 2, 2026.
Transparency logRelease files / xblock-6.3.5-py3-none-any.whl
| Download URL | xblock-6.3.5-py3-none-any.whl |
|---|---|
| Size | 161.0 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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BLAKE2b-256 checksum How to use checksums |
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|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.16
|
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Nov 2, 2026.
Transparency logSecurity for XBlock 6.3.5
Provenance
Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.
Full provenance
All 2 files in this release have been uploaded with provenance metadata.
Attestation for xblock-6.3.5.tar.gz
PyPI Publish Attestation
PyPI verified that this artifact, at this checksum, originated from the publisher listed below.
Signed by GitHub Actions, verified by PyPI on Nov 2, 2026.
Transparency logA note on package security
PyPI is a repository for distributing packages, not a service for auditing them. While third-party security researchers and our staff do their best to detect and remove malicious packages, PyPI cannot guarantee the quality, security or suitability of any given package.
To learn more about protecting yourself from malicious actors, visit our package security documentation.
