How can I use Cython with Python 3?

How can I use Cython with Python 3?

Cython is a programming language that makes writing C extensions for Python as easy as Python itself. You can use it to speed up your Python code. Would you like a simple example?

Yes, please provide a basic example.

Sure! First, install Cython using pip: pip install cython. Then, create a file named example.pyx with the following code:

def say_hello(name):
    print(f'Hello, {name}!')

You can compile this using a setup script.

What does the setup script look like?

Here's a simple setup script named setup.py:

from setuptools import setup
from Cython.Build import cythonize

setup(ext_modules=cythonize('example.pyx'))

Run it with python setup.py build_ext --inplace to compile your Cython code.

How do I run the compiled code?

After compiling, you can import the function in Python like this:

from example import say_hello
say_hello('World')

This will print 'Hello, World!'.