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.

Fix Bugs

Look through the GitHub issues for bugs. Anything tagged with “bug” is open to whoever wants to implement it.

Implement Features

Look through the GitHub issues for features. Anything tagged with “feature” is open to whoever wants to implement it.

Write Documentation

Regressors could always use more documentation, whether as part of the official Regressors 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 regressors for local development.

  1. Fork the regressors repo on GitHub.

  2. Clone your fork locally, then add the original repository as an upstream:

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

    $ pip install virtualenv virtualenvwrapper
    $ mkvirtualenv -r requirements_dev.txt regressors
    $ pip install numpy scipy
    $ python develop
  4. Create a branch for local development, branching off of dev:

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

    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 regressors tests  # Check Python syntax
    $ python test  # Run unittest tests
    $ tox  # Run unittests and check compatibility on Python 2.6, 2.7, 3.3-5

    flake8 and tox will have been installed when you created the virtualenv above.

    In order to fully support tox, you will need to have Python 2.6, 2.7, 3.3, 3.4, and 3.5 available on your system. If you’re using Mac OS X you can follow this guide to cleanly install multiple Python versions.

    If you are not able to get all tox environments working, that’s fine, but take heed that a pull request that has not been tested against all Python versions might be rejected if it is not compatible with a specific version. You should try your best to get the tox command working so you can verify your code and tests against multiple Python versions. You should check Travis CI in lieu once your pull request has been submitted.

  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

    Write sensible commit message: read this post and this one before writing a single commit.

  7. Submit a pull request through the GitHub website to merge your feature to branch dev. To ensure your pull request can be automatically merged, play your commits on top of the most recent dev branch:

    $ git fetch upstream
    $ git checkout dev
    $ git merge upstream/dev
    $ git checkout name-of-your-bugfix-or-feature
    $ git rebase dev

    This will pull the latest changes from the main repository and let you take care of resolving any merge conflicts that might arise in order for your pull request to be merged.

Pull Request Guidelines

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

  1. The pull request should include tests.
  2. 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 README.rst.
  3. The pull request should work for Python 2.6, 2.7, 3.3, and 3.4, and for PyPy. Check and make sure that the tests pass for all supported Python versions.


To run a subset of tests:

$ python -m unittest tests.test_regressors