Cython: C-Extensions for Python

3.2.4 · active · verified Sat Mar 28

Cython is an optimizing static compiler for both the Python programming language and the extended Cython programming language, making writing C extensions for Python as easy as Python itself. Current version: 3.2.4. Release cadence: Regular updates with active development and maintenance.

Warnings

breaking Support for Python 2.7 - 3.7 was removed in Cython 3.3.0a0, along with large chunks of legacy code.
Fix: Upgrade to Python 3.8 or later.
gotcha Using the pure Python syntax for static type declarations requires a recent Cython 3 release due to significant improvements over the 0.29.x releases.
Fix: Upgrade to the latest Cython 3 release.

Install

pip install cython Install Cython

Imports

cython
```
import cython
```
Necessary for using Cython-specific features

Quickstart

A simple example demonstrating the use of Cython's cfunc decorator to define a C function in Python.

import cython

@cython.cfunc
@cython.exceptval(-1)
def add(int x, int y):
    return x + y

print(add(2, 3))

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