How to Compile a .pyx File to C and Run it on Python?

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To compile a .pyx file to C and run it in Python, you can use Cython. Cython is a programming language that is a superset of Python, allowing you to write Python-like code that can be compiled to C for improved performance. Here’s an overview of the steps:

  1. Install Cython using pip:
pip install cython
  1. Create a .pyx file containing your Cython code. This file will have a similar syntax to Python but may include type annotations and other Cython-specific features for performance optimization.
  2. Create a file in the same directory as your .pyx file. This file is used to compile the Cython code into a C extension module.

Here’s an example of a file:

from distutils.core import setup
from Cython.Build import cythonize


Replace "your_module.pyx" with the name of your .pyx file.

  1. Open a command prompt or terminal and navigate to the directory containing your file.
  2. Run the following command to build the C extension module:
python build_ext --inplace

This command will generate a compiled C extension module in the same directory as your .pyx file.

  1. Import and use the compiled module in your Python code:
import your_module

# Use functions and objects from your_module

Make sure to replace "your_module" with the actual name of your module.

By following these steps, you can compile your .pyx file to C using Cython and use the resulting C extension module in your Python code. Remember to consult the Cython documentation for more advanced usage and optimization techniques.

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