Contributing

Bug reports, feature suggestions and other contributions are greatly appreciated! pysat and pysatCDAAC are community-driven projects that welcome both feedback and contributions.

Short version

• Submit bug reports, feature requests, and questions at GitHub Issues

• Make pull requests to the develop branch

More about Issues

Bug reports, questions, and feature requests should all be made as GitHub Issues. Templates are provided for each type of issue, to help you include all the necessary information.

Questions

Not sure how something works? Ask away! The more information you provide, the easier the question will be to answer. You can also interact with the pysat developers on our slack channel.

Bug reports

When 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

Feature requests

If you are proposing a new feature or a change in something that already exists:

• 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 code contributions are welcome :)

More about Development

To set up pysatCDAAC for local development:

1. Fork pysatCDAAC on GitHub.

2. Clone your fork locally:

   git clone git@github.com:your_name_here/pysatCDAAC.git

3. Create a branch for local development:

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

4. Make your changes locally. Tests for new instruments are performed automatically. Tests for custom functions should be added to the appropriately named file in pysatCDAAC/tests. For example, methods contained in pysatCDAAC/instruments/methods/usercode.py should be named pysatCDAAC/tests/test_methods_usercode.py. If no test file exists, then you should create one. This testing uses pytest, which will run tests on any python file in the test directory that starts with test. Test classes must begin with Test, and test methods must also begin with test.

5. When you’re done making changes, run all the checks to ensure that nothing is broken on your local system:

   pytest -vs pysatCDAAC

6. Update/add documentation (in docs). Even if you don’t think it’s relevant, check to see if any existing examples have changed.

7. Add your name to the .zenodo.json file as an author

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

   git add . git commit -m “Brief description of your changes” git push origin name-of-your-bugfix-or-feature

9. Submit a pull request through the GitHub website. Pull requests should be made to the develop branch.

Pull Request Guidelines

If you need some code review or feedback while you’re developing the code, just make a pull request. Pull requests should be made to the develop branch.

For merging, you should:

1. Include an example for use

2. Add a note to CHANGELOG.md about the changes

3. Ensure that all checks passed (current checks include Travis-CI and Coveralls) [1]

[1]

If you don’t have all the necessary Python versions available locally or have trouble building all the testing environments, you can rely on Travis to run the tests for each change you add in the pull request. Because testing here will delay tests by other developers, please ensure that the code passes all tests on your local system first.

Project Style Guidelines

In general, pysat follows PEP8 and numpydoc guidelines. Pytest runs the unit and integration tests, flake8 checks for style, and sphinx-build performs documentation tests. However, there are certain additional style elements that have been settled on to ensure the project maintains a consistent coding style. These include:

• Line breaks should occur before a binary operator (ignoring flake8 W503)

• Combine long strings using join

• Preferably break long lines on open parentheses rather than using \

• Use no more than 80 characters per line

• Avoid using Instrument class key attribute names as unrelated variable names: platform, name, tag, and inst_id

• The pysat logger is imported into each sub-module and provides status updates at the info and warning levels (as appropriate)

• Several dependent packages have common nicknames, including:

  • import datetime as dt

  • import numpy as np

  • import pandas as pds

  • import xarray as xr

• All classes should have __repr__ and __str__ functions

• Docstrings use Note instead of Notes

• Try to avoid creating a try/except statement where except passes

• Use setup and teardown in test classes

• Use pytest parametrize in test classes when appropriate

• Provide testing class methods with informative failure statements and descriptive, one-line docstrings

• Block and inline comments should use proper English grammar and punctuation with the exception of single sentences in a block, which may then omit the final period

• When casting is necessary, use np.int64 and np.float64 to ensure operating system agnosticism