Python - Cython

• Source: Easy wins with Cython: fast and multi-core by Caleb Hattingh

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1. Installation: pip install cython
2. Write the cython file … it MUST end in .pyx ~ex.: function.pyx, (Instead of a normal python function file ~ex.: function.py)
3. Create a setup.py file with the following code:

   from setuptools import setup
   from Cython.Build import cythonize
   setup(
      ext_modules = cythonize('function.pyx')
   )

4. Open the terminal end run the following command: python setup.py build_ext --inplace
5. It will build a binary file, somenthing like function.cp39-win_amd64.pyd, than import it normally with:

   import function

This is the basic folder structure for this implementation

python package/
├── main.py
└── sub_package/
    ├── __init__.py
 	└──	src/
	 	├── cython_module.pyx
 		├── setup.py
 		├── cython_module.c
 		└── ...

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With my custom folder structuren (NOT WORKING)

python package/
├── main.py
└── sub_package/
    ├── __init__.py
    ├── cython_module.pyx
 	└──	src/
 		├── setup.py
 		├── cython_module.c
 		└── ...

• Objectives:
  • I want to see only the .pyx files in my folder, all others files created need to be in the src/ folder.
• Useful link:
  • Cython official docs

Code for the setup.py file:TODO

from setuptools import setup
from Cython.Build import cythonize
setup(
  ext_modules = cythonize('function.pyx')
)

Command for the terminal:TODO

python setup.py build_ext --inplace

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