NumPy Essentials

The basic structure of an extension module

An extension module written in C will have the following parts:

• A header segment, where you include all your external libraries and Python.h
• An initialization segment, where you define the module name and the functions in your C module
• A method structure array to define all the functions in your module
• An implementation segment, where you define all the functions that you would like to expose

The header segment

Header snippets are quite standard, just like a normal C module. We need to include the Python.h header file to give our C code access to the internals of the C-API. This file is present in <path_to_python>/include. We will be using an array object in our example code, hence we have included the numpy/arrayobject.h ...