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How to Contribute

We'd love to accept your patches and contributions to this project. There are just a few small guidelines you need to follow.

Contributor License Agreement

Contributions to this project must be accompanied by a Contributor License Agreement. You (or your employer) retain the copyright to your contribution, this simply gives us permission to use and redistribute your contributions as part of the project. Head over to https://cla.developers.google.com/ to see your current agreements on file or to sign a new one.

You generally only need to submit a CLA once, so if you've already submitted one (even if it was for a different project), you probably don't need to do it again.

Code reviews

All submissions, including submissions by project members, require review. We use GitHub pull requests for this purpose. Consult GitHub Help for more information on using pull requests.

Community Guidelines

This project followsGoogle's Open Source Community Guidelines.

Contributing Guidelines

Running Unit Tests

We recommend using virtualenv and Python 3.5 and above for development. You can invoke all python unit tests:

python setup.py test

By default, only unit tests are executed. Tests marked as end_to_end will be skipped.

Testing local change

To test local change, you will need to install code into virtualenv in editable mode:

pushd <your_source_dir>
pip install -e .

Check Pending Changes

Each change being worked on internally will have a pending PR, which will be automatically closed once internal change is submitted. You are welcome to checkout the PR branch to observe the behavior.

Merging External Contributions

External contributions can be submitted normally as a Github PR.

All submissions, including submissions by project members, require review. We use GitHub pull requests for this purpose. Consult GitHub Help for more information on using pull requests.

After a pull request is approved, we merge it. Note our merging process differs from GitHub in that we pull and submit the change into an internal version control system. This system automatically pushes a git commit to the GitHub repository (with credit to the original author) and closes the pull request.

A TFX engineer will monitor all public PRs and look at the issue within 5 business days to perform initial triage.

Python 2 and type hints

Starting from TFX 0.14, all python source code on github includes Python 3 type hints. Python 3.6 (or above) is the recommended version to develop this project.

The Python 2 version of tfx PyPI package has all type hints stripped and is the easiest way for python 2 users.

Python 2 support will be deprecated in 2020, due to python 2 not supported beyong 2020.

If you must use Python 2 with source code:

  • run python tfx/scripts/strip_type_hints.py to strip all hints in the repo: this requires you to install the strip-hints PyPI package.
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