Creating a DLL (Dynamic Link Library) file from Python code involves a few steps. You can use a tool like Cython or PyInstaller to compile your Python code into a DLL. Here, I'll guide you through using Cython.



First, you need to install Cython if you haven't already:

```bash

pip install cython

```

Then, create a Python file (let's say `example.py`) with the code you want to compile into a DLL. For demonstration purposes, let's just create a simple function:

```python

# example.py

def add(a, b ) :

    return a + b

```

Next, create a Cython file (let's name it `example_cython.pyx`) where you declare the function signature and its implementation:

```python

# example_cython.pyx

def add(int a, int b ):

    return a + b

```

Now, you need a `setup.py` script to build the Cython file into a DLL:

```python

# setup.py

from distutils.core import setup

from Cython.Build import cythonize

setup(

    ext_modules = cythonize("example_cython.pyx")

)

```

With all these files in place, navigate to the directory containing them in your terminal and run:

```bash

python setup.py build_ext --inplace

```

This command will generate a `.pyd` file (which is the Windows equivalent of a `.so` file on Unix-like systems) containing your compiled code.

Now you can use this DLL in your Python scripts or in other programming languages like C/C++ that support calling functions from DLLs.