cython-setuptools

Easier distribution and development of Cython modules.

Features:

• Two distribution models: with C/C++ files included in the package, and without
• Cython modules are defined in setup.cfg
• Install directly from Cython sources, without installing Cython in the target environment (Cython is only included in install_requires)

Installation

$ pip install cython-setuptools

Usage

Here is an example Python package using the default distribution model (only Cython files are included in the source package).

First install the cython-setuptools vendor module in the package, next to setup.py.

$ cd your-python-project/
$ cython-setuptools install

Then use cython-setuptools‘ setup() in your setup.py:

from cysetuptools import setup

setup()

Note that we keep the default cythonize=True argument of setup() here, meaning that C files are compiled from Cython files automatically. setup(cythonize=False) would mean we would need to distribute the C/C++ files compiled from Cython in the source package.

Define your Cython modules in setup.cfg.

[metadata]
name = your-python-project
version = 1.0

[options]
packages = find:
install_requires = cython

[options.extras_require]
dev = cython

[cython-defaults]
include_dirs = include/

[cython-module: foo.bar]
sources = foo.pyx
          bar.cpp
include_dirs = eval(__import__('numpy').get_include())
language = c++
pkg_config_packages = opencv

Then your Cython modules can be compiled and tested in-place with:

$ python setup.py build_ext --inplace

This automatically compile outdated Cython files. If setup(cythonize=False) is used, you have to specifically tell the setup to recompile outdated Cython files:

$ CYTHONIZE=1 python setup.py build_ext --inplace