Author: Ahmed Nabil

Python Engineer and the founder of Python Pro Hub. With a focus on modern data science (Polars), backend architecture (FastAPI/Django), and automation, builds production-grade tutorials designed to take developers from absolute beginners to advanced software engineers.

Data Science | Python Projects
AI Project: Real-Time Object Detection on Your Laptop (YOLOv8)
ByAhmed Nabil July 6, 2026May 31, 2026
We’ve done Object Detection with Hugging Face, but that ran on a server model. If you want to try using YOLOv8 Python for computer vision…
Read More AI Project: Real-Time Object Detection on Your Laptop (YOLOv8)
Python Errors
How to Fix: TypeError: argument of type ‘int’ is not iterable
ByAhmed Nabil July 4, 2026May 31, 2026
This error looks similar to loop errors, but it targets a specific mistake — using the in operator against a plain number. The TypeError: argument…
Read More How to Fix: TypeError: argument of type ‘int’ is not iterable
Data Science
Modern Data Lakes: Reading and Writing Delta Tables with Polars
ByAhmed Nabil July 4, 2026May 17, 2026
We’ve used Parquet files because they are fast. But what if you write to a Parquet file while someone else is reading it? The file…
Read More Modern Data Lakes: Reading and Writing Delta Tables with Polars
Data Science | Python Projects
AI Project: Run Llama 3 on Your Laptop (with llama-cpp-python)
ByAhmed Nabil July 4, 2026May 17, 2026
Cloud APIs like ChatGPT are powerful, but they cost money and send your data to a server. the “2026 Vision” is Edge AI: running powerful…
Read More AI Project: Run Llama 3 on Your Laptop (with llama-cpp-python)
Python Errors
How to Fix: ModuleNotFoundError: No module named ‘sklearn’ (Package Names vs. Imports)
ByAhmed Nabil July 3, 2026May 31, 2026
This is one of the most confusing aspects of the Python ecosystem for beginners and veterans alike. The name you use to install a package…
Read More How to Fix: ModuleNotFoundError: No module named ‘sklearn’ (Package Names vs. Imports)
Data Science
Polars Performance Tuning: 3 Tricks to Make Your Code Faster
ByAhmed Nabil July 3, 2026May 31, 2026
Polars is fast by default. But you can make it slower if you write “Pandas-style” code. Here are the top 3 optimisations for Polars Performance…
Read More Polars Performance Tuning: 3 Tricks to Make Your Code Faster
Data Science | Python Projects
AI Project: Build a Local “Jarvis” (Real-Time Voice Commands with Whisper)
ByAhmed Nabil July 3, 2026May 31, 2026
We’ve generated audio and transcribed files. Now, let’s do it live with a Python Voice Assistant. We will build a script that: Step 1: Installation…
Read More AI Project: Build a Local “Jarvis” (Real-Time Voice Commands with Whisper)
Python Errors
How to Fix: TypeError: ‘bool’ object is not subscriptable
ByAhmed Nabil July 1, 2026May 31, 2026
This TypeError bool not subscriptable follows the pattern of int and NoneType errors. It means: “You are trying to use square brackets [] (to access…
Read More How to Fix: TypeError: ‘bool’ object is not subscriptable
Data Science
Polars Feature Engineering: Lags, Diffs, and Percent Changes
ByAhmed Nabil July 1, 2026May 17, 2026
If you are training a Machine Learning model to predict stock prices or sales, you can’t just feed it “Today’s Price.” You need to feed…
Read More Polars Feature Engineering: Lags, Diffs, and Percent Changes
Data Science | Web Development
How to Host Your AI App for Free: Deploying Gradio to Hugging Face Spaces
ByAhmed Nabil July 1, 2026May 17, 2026
We built a Gradio app to demo our AI models. But it only ran on your local computer (localhost) so How do you show it…
Read More How to Host Your AI App for Free: Deploying Gradio to Hugging Face Spaces