Contributing to Pint

You can contribute in different ways:

Report issues

You can report any issues with the package, the documentation to the Pint issue tracker. Also feel free to submit feature requests, comments or questions.

Contribute code

To contribute fixes, code or documentation to Pint, fork Pint in github and submit the changes using a pull request against the master branch.

  • If you are fixing a bug, add a test to, or amend/enrich the general test suite to cover the use case.

  • If you are submitting new code, add tests and documentation.

  • Write “Closes #<bug number>” in the PR description or a comment, as described in the github docs.

  • Log the change in the CHANGES file.

  • Execute black -t py36 . && isort -rc . && flake8 and resolve any issues.

Pint uses bors-ng as a merge bot and therefore every PR is tested before merging.

In any case, feel free to use the issue tracker to discuss ideas for new features or improvements.

Setting up your environment

If you’re contributing to this project for the fist time, you can set up your environment on Linux or OSX with the following commands:

$ git clone
$ cd pint
$ python -m virtualenv venv
$ source venv/bin/activate
$ pip install -e .
$ pip install -r requirements_docs.txt

Running tests and building documentation

To run the test suite, invoke pytest from the pint directory:

$ cd pint
$ pytest

To run the doctests, invoke Sphinx’s doctest module from the docs directory:

$ cd docs
$ make doctest

To build the documentation, invoke Sphinx from the docs directory:

$ cd docs
$ make html

Extension Packages

Pint naturally integrates with other libraries in the scientific Python ecosystem, and a small number of `extension/compatibility packages<numpy.html#Compatibility-Packages>`_ have arisen to aid in compatibility between certain packages. Pint’s rule of thumb for integration features that work best as an extension pacakage versus direct inclusion in Pint is:

  • Extension (separate packages)

  • Integration (built in to Pint)

    • Duck array types wrapped by Pint (below Pint in the type casting hierarchy)

    • Intermingling of APIs occurs

    • Examples: Dask