For bug fixes or new features, please file an issue before submitting a pull request. If the change isn't trivial, it may be best to wait for feedback.
Tests are written as usual Python unit tests with the unittest module of
the standard library. Running them requires the extension to be built
locally:
$ python setup.py build_ext --debug --inplace
$ python -m unittest discover -vvThis project targets Python 3.5 or later.
Python objects should be typed; since it is not supported in C extensions,
you must manually declare types in type stubs (.pyi files). In Python
files, you can add type annotations to function signatures (supported in
Python 3.5), but not in variable assignments (supported only from Python 3.6
onward).
When interfacing with C, and in particular with pointers, try to use debug assertions everywhere you assume the pointer to be non-NULL.