How to call C / C++ from Python?
In order to take advantage of the strength of both languages, developers use Python bindings which allows them to call C/C++ libraries from python.
Now, the question arises that why there is a need for doing this?
- As we know that, C has faster execution speed and to overcome the limitation of Global Interpreter Lock(GIL) in python, python bindings are helpful.
- We have a large, stable and tested library in C/C++, which will be advantageous to use.
- For performing large scale testing of the systems using Python test tools.
Let’s see the C code which we want to execute with Python :
We have to provide those cpp declarations as extern “C” because ctypes can only interact with C functions.
Now, compile this code to the shared library :
Finally, write the python wrapper: