Contributions are welcome, and they are greatly appreciated! Every little bit helps, and credit will always be given.
Report bugs at https://github.com/qucontrol/weylchamber/issues.
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.
The best way to send feedback is to file an issue at https://github.com/qucontrol/weylchamber/issues.
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 :)
Fix Bugs / Implement Features¶
Look through the GitHub issues for bugs or feature requests. Anybody is welcome to submit a pull request for open issues.
Pull Request Guidelines¶
Before you submit a pull request, check that it meets these guidelines:
The pull request should include tests.
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.
Check https://travis-ci.org/qucontrol/weylchamber/pull_requests and make sure that the tests pass for all supported Python versions.
Ready to contribute? Follow Aaron Meurer’s Git Workflow Notes (with
qucontrol/weylchamber instead of
Clone the repository from
Fork the repo on GitHub to your personal account.
Add your fork as a remote.
Pull in the latest changes from the master branch.
Create a topic branch
Make your changes and commit them (testing locally)
Push changes to the topic branch on your remote
Make a pull request against the base master branch through the Github website of your fork.
The project contains a
Makefile to help with development tasks. In your checked-out clone, do
$ make help
to see the available make targets.
It is strongly recommended that you use the conda package manager. The
Makefile relies on conda to create local testing and documentation building
make test and
Alternatively, you may use
make develop-test and
make develop-docs to
run the tests or generate the documentation within your active Python
environment. You will have to ensure that all the necessary dependencies are
installed. Also, you will not be able to test the package against all supported
You still can (and should) look at https://travis-ci.org/qucontrol/weylchamber/ to check that your commits pass all tests.
From a checkout of the
weylchamber repository, assuming conda is installed, you can use
$ make test
to run the entire test suite.
The tests are organized in the
tests subfolder. It includes python scripts
whose name start with
test_, which contain functions whose names also start
test_. Any such functions in any such files are picked up by pytest
for testing. In addition, doctests from any docstring or any documentation
*.rst) are picked up (by the pytest doctest plugin).
Lastly, all Jupyter notebooks in the documentation are validated as a test,
through the nbval plugin.
weylchamber package could always use more documentation, whether
as part of the official docs, in docstrings, or even on the web in blog posts,
articles, and such.
The package documentation is generated with Sphinx, the
documentation (and docstrings) are formatted using the
Restructured Text markup language (file extension
See also the Matplotlib Sphinx Sheet sheet for some helpful tips.
Each function or class must have a docstring; this docstring must be written in the “Google Style” format (as implemented by Sphinx’ napoleon extension). Docstrings and any other part of the documentation can include mathematical formulas in LaTeX syntax (using mathjax).
At any point, from a checkout of the
weylchamber repository (and
assuming you have conda installed), you may run
$ make docs
to generate the documentation locally.
The following assumes your current working directory is a checkout of
weylchamber, and that you have successfully run
make test (which creates
some local virtual environments that development relies on).
How to work on a topic branch¶
When working on an non-trivial issue, it is recommended to create a topic
branch, instead of pushing to
To create a branch named
$ git branch issue18 $ git checkout issue18
You can then make commits, and push them to Github to trigger Continuous Integration testing:
$ git push origin issue18
It is ok to force-push on an issue branch
When you are done (the issue has been fixed), finish up by merging the topic
branch back into
$ git checkout master $ git merge --no-ff issue18
--no-ff option is critical, so that an explicit merge commit is created.
Summarize the changes of the branch relative to
master in the commit
Then, you can push master and delete the topic branch both locally and on Github:
$ git push origin master $ git push --delete origin issue18 $ git branch -D issue18
Commit Message Guidelines¶
Write commit messages according to this template:
Short (50 chars or less) summary More detailed explanatory text. Wrap it to 72 characters. The blank line separating the summary from the body is critical (unless you omit the body entirely). Write your commit message in the imperative: "Fix bug" and not "Fixed bug" or "Fixes bug." This convention matches up with commit messages generated by commands like git merge and git revert. Further paragraphs come after blank lines. - Bullet points are okay, too. - Typically a hyphen or asterisk is used for the bullet, followed by a single space. Use a hanging indent.
A properly formed git commit subject line should always be able to complete the sentence “If applied, this commit will <your subject line here>”.
How to reference a Github issue in a commit message¶
Simply put e.g.
#14 anywhere in your commit message, and Github will
automatically link to your commit on the page for issue number 14.
You may also use something like
Closes #14 as the last line of your
commit message to automatically close the issue.
See Closing issues using keywords for details.
How to run a jupyter notebook server for working on notebooks in the docs¶
A notebook server that is isolated to the proper testing environment can be started via the Makefile:
$ make jupter-notebook
This is equivalent to:
$ .venv/py36/bin/jupyter notebook --config=/dev/null
You may run this with your own options, if you prefer. The
--config=/dev/null guarantees that the notebook server is completely
isolated. Otherwise, configuration files from your home directly (see
Jupyter’s Common Configuration system) may influence the server. Of
course, if you know what you’re doing, you may want this.
If you prefer, you may also use the newer jupyterlab:
$ make jupter-lab
How to convert a notebook to a script for easier debugging¶
Interactive debugging in notebooks is difficult. It becomes much easier if you convert the notebook to a script first. To convert a notebook to an (I)Python script and run it with automatic debugging, execute e.g.:
$ .venv/py36/bin/jupyter nbconvert --to=python --stdout docs/tutorial.ipynb > debug.py $ .venv/py36/bin/ipython --pdb debug.py
You can then also set a manual breakpoint by inserting the following line anywhere in the code:
from IPython.terminal.debugger import set_trace; set_trace() # DEBUG
How to commit failing tests or notebooks¶
The test-suite on the
master branch should always pass without error. If you
would like to commit any example notebooks or tests that currently fail, as a
form of test-driven development, you have two options:
Push onto a topic branch (which are allowed to have failing tests), see How to work on a topic branch. The failing tests can then be fixed by adding commits to the same branch.
Mark the test as failing. For normal tests, add a decorator:
See the pytest documentation on skip and xfail for details.
For notebooks, the equivalent to the decorator is to add a comment to the first line of the failing cell, either:
(this may affect subsequent cells, as the marked cell is not executed at all). See the documentation of the nbval pluging on skipping and exceptions for details.
How to run a subset of tests¶
To run e.g. only the tests defined in
$ ./.venv/py36/bin/pytest tests/test_weylchamber.py
See the pytest test selection docs for details.
How to run only as single test¶
Decorate the test with e.g.
@pytest.mark.xxx, and then run, e.g:
$ ./.venv/py36/bin/pytest -m xxx tests/
See the pytest documentation on markers for details.
How to run only the doctests¶
Run the following:
$ ./.venv/py36/bin/pytest --doctest-modules src
How to go into an interactive debugger¶
Optionally, install the pdbpp package into the testing environment, for a better experience:
$ ./.venv/py36/bin/python -m pip install pdbpp
before the line where you went to enter the debugger, insert a line:
from IPython.terminal.debugger import set_trace; set_trace() # DEBUG
pytestwith the option
$ ./.venv/py36/bin/pytest -m xxx -s tests/
You may also see the pytest documentation on automatic debugging.