Python ctypes using C members

Python’s ctypes library allows you to call functions in dynamic link libraries/shared libraries and access C data types in Python. In this tutorial, we will focus on using ctypes to work with C++ class members in a shared library. We’ll cover the following topics:
To follow along with this tutorial, you should have the following:
Let’s start by creating a simple C++ class with some members. Create a file named myclass.h for the class definition:
Now, implement the class in a file named myclass.cpp:
Compile the C++ code into a shared library using your C++ compiler. On Linux, you can use the following command:
This will produce a shared library file named myclass.so.
Now, let’s create a Python script to load the shared library and access the C++ class members. Save this script as ctypes_example.py:
To run the Python script, ensure that the myclass.so file is in the same directory as the script, or you can provide the full path to the shared library. Execute the script as follows:
You should see the output, which demonstrates how to interact with the C++ class and its members from Python using ctypes.
That’s it! You’ve successfully used Python ctypes to work with C++ class members in a shared library. You can expand on this foundation to create more complex interactions between Python and C++ code.
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