1. In the description of your Pull Request explain clearly what does it implements/fixes and your changes. Possibly give an example in the description of the PR. In cases that the PR is about a code speedup, report a reproducible example and quantify the speedup.

2. Give your pull request a helpful title that summarises what your contribution does.

3. Write unit tests for your code and make sure the existing tests are up to date. `pytest` can be used for this:

4. Make sure that there a no stylistic issues using `pycodestyle`:

5. Make sure your code is properly commented and documented. Each public method needs to be documented as the existing ones.