Contributions are welcome, and they are greatly appreciated! Every little bit helps, and credit will always be given.

You can contribute in many ways:

Types of Contributions

Report Bugs

Report bugs at

If you are reporting a bug, please include:

  • Your operating system name and version.

  • Any details about your local setup that might be helpful in troubleshooting.

  • Detailed steps to reproduce the bug.

Add Datasets

DIALS data was planned to support a more or less arbitrary number of datasets. You can contribute by adding more.

Write Documentation

DIALS Regression Data could always use more documentation, whether as part of the official DIALS Regression Data docs, in docstrings, or even on the web in blog posts, articles, and such.

Submit Feedback

The best way to send feedback is to file an issue at

If you are proposing a feature:

  • Explain in detail how it would work.

  • Keep the scope as narrow as possible, to make it easier to implement.

  • Remember that this is a volunteer-driven project, and that contributions are welcome :)

Get Started!

Ready to contribute? Here’s how to set up dials_data for local development.

  1. Fork the dials_data repo on GitHub.

  2. Clone your fork locally:

    $ git clone
  3. Install your local copy into a virtualenv. Assuming you have virtualenvwrapper installed, this is how you set up your fork for local development:

    $ mkvirtualenv dials_data
    $ cd dials_data/
    $ python develop
  4. Create a branch for local development:

    $ git checkout -b name-of-your-bugfix-or-feature

    Now you can make your changes locally.

  5. When you’re done making changes, check that your changes pass flake8 and the tests, including testing other Python versions with tox:

    $ flake8 dials_data tests
    $ python test or py.test
    $ tox

    To get flake8 and tox, just pip install them into your virtualenv.

  6. Commit your changes and push your branch to GitHub:

    $ git add .
    $ git commit -m "Your detailed description of your changes."
    $ git push origin name-of-your-bugfix-or-feature
  7. Submit a pull request through the GitHub website.

Pull Request Guidelines

Before you submit a pull request, check that it meets these guidelines:

  1. The pull request should include tests, unless you are adding or updating a dataset.

  2. If you add or update a dataset then make individual pull requests for each dataset, so that they can be discussed and approved separately.

  3. If the pull request adds functionality, the docs should be updated. Put your new functionality into a function with a docstring, and add the feature to the list in HISTORY.rst.

  4. The pull request should work for all supported Python versions. Check


Any commit on the master branch is now automatically deployed to PyPI, so there is no need to play around with tags or version numbers on a regular basis.

For slightly larger changes make sure that the entry in HISTORY.rst is updated, and then run:

$ bumpversion minor # possible: major / minor, do not use patch

Travis will then automatically tag the commit once it hits the master branch and the tests pass, and then deploy to PyPI as usual.