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
Working with Dates in Polars: The .dt Namespace (2026 Guide)
ByAhmed Nabil April 13, 2026April 7, 2026
Just loading dates isn’t enough. For real analysis, you need to “engineer features” from them, like “What day of the week do most sales happen?”…
Read More Working with Dates in Polars: The .dt Namespace (2026 Guide)
Python Errors
How to Fix: KeyError (A Beginner’s Deep Dive)
ByAhmed Nabil April 11, 2026March 29, 2026
A KeyError is a message from Python saying: “You asked me to find a key in a dictionary, but that key does not exist.” If…
Read More How to Fix: KeyError (A Beginner’s Deep Dive)
Data Science
Handling Nested Data in Polars: explode() and unnest()
ByAhmed Nabil April 11, 2026March 22, 2026
Real-world data from APIs often comes as nested JSON. Pandas struggles with this, but Polars has two powerful expressions built for it: explode and unnest….
Read More Handling Nested Data in Polars: explode() and unnest()
Data Science | Python Projects | Web Development
AI Project: How to Deploy a Hugging Face Model as a REST API (with Flask)
ByAhmed Nabil April 11, 2026March 22, 2026
You’ve built amazing AI models with Hugging Face, but they’re stuck in your script. Want to know how to deploy Hugging Face API so other…
Read More AI Project: How to Deploy a Hugging Face Model as a REST API (with Flask)
Python Errors
How to Fix: SyntaxError: invalid syntax (on else / elif)
ByAhmed Nabil April 10, 2026March 22, 2026
This is one of the most common errors for beginners, and it’s almost always an IndentationError in disguise. The SyntaxError invalid syntax else issue is…
Read More How to Fix: SyntaxError: invalid syntax (on else / elif)
Data Science
Cleaning Text in Polars: The .str Expression Namespace
ByAhmed Nabil April 10, 2026March 22, 2026
Text data is almost always messy. One of the most efficient ways to tackle this is with Polars string manipulation. In Pandas, you use .str…
Read More Cleaning Text in Polars: The .str Expression Namespace
Data Science | Python Projects
AI Project: Speech-to-Text with Hugging Face (OpenAI Whisper)
ByAhmed Nabil April 10, 2026March 21, 2026
You’ve used the Hugging Face pipeline to understand text and images. Now, let’s teach it to understand audio using Hugging Face Speech to Text. We…
Read More AI Project: Speech-to-Text with Hugging Face (OpenAI Whisper)
Python Errors
How to Fix: AttributeError: ‘Response’ object has no attribute ‘json’
ByAhmed Nabil April 8, 2026March 21, 2026
This AttributeError Response object issue is one of the most common typos when working with APIs and the requests library. It means: “You typed response.json…
Read More How to Fix: AttributeError: ‘Response’ object has no attribute ‘json’
Web Development
Django Project: Building a Simple Comment System
ByAhmed Nabil April 8, 2026March 22, 2026
A blog isn’t complete until users can comment. This project will teach you one of Django’s most important concepts: database relationships (ForeignKeys). Building a Django…
Read More Django Project: Building a Simple Comment System
Data Science | Web Development
PyScript Project: Load and Analyze a User’s CSV File in the Browser
ByAhmed Nabil April 8, 2026March 21, 2026
This is the ultimate goal of PyScript for Data Science: building a tool that lets your users analyze their own data, all inside their browser….
Read More PyScript Project: Load and Analyze a User’s CSV File in the Browser