Reporting issues and proposing changes#

Lightkurve is actively developed on its GitHub repository.

If you encounter a problem with Lightkurve, we encourage you to open an issue on the GitHub repository.

If you would like to propose a change or bug fix to Lightkurve, please go ahead and open a pull request using the steps explained below.

Proposing changes to Lightkurve using GitHub Pull Requests#

We welcome suggestions for enhancements or new features to Lightkurve via GitHub.

If you want to make a significant change such as adding a new feature, we recommend opening a GitHub issue to discuss the changes first. Once you are ready to propose the changes, please go ahead and open a pull request.

If in doubt on how to open a pull request, we recommend Astropy’s “How to make a code contribution” tutorial. In brief, the steps are as follows:

1. Fork Lightkurve’s GitHub repository#

The first step is to create a copy of Lightkurve’s GitHub repository by logging into GitHub, browsing to, and clicking the Fork button in the top right corner.

2. Clone the fork to your computer#

Head to a local directory of your choice and download your fork:

$ git clone

3. Install the development environment#

Lightkurve uses the poetry package to create an isolated development environment which you can use to modify and test changes to the source code without interfering with your existing Python environment.

You can set up the environment as follows:

$ cd lightkurve
$ python -m pip install poetry
$ poetry install

A key advantage of the development environment is that any changes you make to the Lightkurve source code will be reflected right away, i.e., there is no need to re-install Lightkurve or the environment after every change.

To run code in the development environment, you will need to prefix every Python command with poetry run. For example:

$ poetry run python
$ poetry run jupyter notebook
$ poetry run pytest  # runs all the unit tests

You can find more details on the poetry website, and you can find additional examples of tasks developers commonly execute in the development environment in Lightkurve’s Makefile.


The use of poetry is not required to prepare and propose modifications to Lightkurve. If you wish to do so, you can install the development version in your current Python environment as follows:

$ cd lightkurve
$ python -m pip install .

In this scenario, you will have to re-run pip install . every time you make changes to the source code.

To avoid this extra step, you have the option of creating a symbolic link from your environment’s site-packages directory to the lightkurve source code tree as follows:

$ python -m pip uninstall lightkurve
$ python -m pip install --editable .  # creates the symbolic link

This “editable install” method requires pip version 21.3 or higher. While this method of installing Lightkurve is not usually recommended, it can be useful when you wish to modify and test multiple different packages in a single environment.

5. Create a new branch#

You are now ready to start contributing changes. Before making new changes, always make sure to retrieve the latest version of the source code as follows:

$ git checkout main
$ git pull upstream main

You are now ready to create your own branch with a name of your choice:

$ git branch name-of-your-branch
$ git checkout name-of-your-branch

6. Make changes and add them to the repository#

You can now go ahead and modify source files. When you are happy about a change, you can commit it to your local version of the repository as follows:

$ git commit -m "description of changes"

7. Push your changes to GitHub and open a Pull Request#

Finally, send the changes to the fork of Lightkurve that resides in your GitHub account:

$ git push origin name-of-your-branch

Head to after issuing the git push command above. You should automatically see a button that says “Compare and open a pull request”. Click the button and submit your pull request!