Cython

pip install -r requirements.txt

python setup.py build_ext --inplace

pip install .

A .pyx or .py file is compiled by Cython to a .c file

The .c file is compiled by a C compiler to a .so file which can be imported directly into a Python session

hello.pyx:

def say_hello_to(name -> str = "Ray") -> str:

print(f"Hello {name}!")

pyproject.toml:

[build-system]

requires = ["setuptools", "setuptools-scm", "Cython", "numpy"]

build-backend = "setuptools.build_meta"

[project]

name = "PACKAGE"

description = "Find contors"

authors = [{name = "NAME", email = "EMAIL"}]

version = "2022.11.1"

dependencies = ["Cython", "numpy"]

[tool.setuptools]

py-modules = ["_custom_build"]

[tool.setuptools.cmdclass]

build_py = "_custom_build.build_py"

_custom_build.py:

import numpy

from setuptools import Extension

from setuptools.command.build_py import build_py as _build_py

class build_py(_build_py):

def run(self):

self.run_command("build_ext")

return super().run()

def initialize_options(self):

super().initialize_options()

if self.distribution.ext_modules is None:

self.distribution.ext_modules = []

self.distribution.ext_modules.append(

Extension(

"findiso",

sources=["findiso/findiso.pyx", "findiso/findContours.cpp"],

include_dirs=[numpy.get_include(), "."],

language="c++",

libraries=["stdc++"],

extra_compile_args=["-std=c++11"],

extra_link_args=["-std=c++11"],

)