Have you ever came across the situation where you have to call C function using python? This article is going to help you on a very basic level and if you have not come across any situation like this, you enjoy knowing how it is possible.
First, let’s write one simple function using C and generate a shared library of the file. Let’s say file name is function.c. 

Python is a high-level programming language that is easy to learn and use. However, sometimes you may need to use a C library or function in your Python code. Fortunately, Python provides an interface to call C functions using the ctypes library. Here's a simple example of how to call a C function from Python:

Assuming we have a C function that calculates the factorial of a number, and the function is defined in a shared library named libfactorial.so, we can call this function from Python using the ctypes library as follows: 

import ctypes

# Load the shared library
lib = ctypes.cdll.LoadLibrary('./libfactorial.so')

# Define the argument and return types of the function
lib.factorial.argtypes = [ctypes.c_int]
lib.factorial.restype = ctypes.c_int

# Call the function
n = 5
result = lib.factorial(n)
print(f"The factorial of {n} is {result}")

In the above code, we first load the shared library containing the C function using ctypes.cdll.LoadLibrary. We then define the argument and return types of the function using argtypes and restype, respectively. Finally, we call the function by passing the argument n and storing the result in the variable result. We then print the result using print.

Note that the argtypes and restype attributes are essential to ensure that the correct data types are used when calling the C function. If these are not set correctly, the function may not work as expected.