Data Engineering with Polars: Performing Upserts (Merge) into Delta Tables
In Data Engineering, you rarely just “write” files. You usually have a master dataset (e.g., “All Users”), and every day you get a “Daily Update”…
AI Project: Building an Instant AI Chatbot with Groq (500+ Tokens/s)
Latency is currently the biggest bottleneck in AI. Waiting for an answer often breaks the creative flow. Fortunately, Groq offers a powerful solution. If you’re…
How to Fix: ValueError: operands could not be broadcast together with shapes
This is the “Hello World” error of Data Science. One of the most common examples you might encounter is the infamous ValueError broadcast shapes. It…
Visualizing Millions of Rows: Polars + Datashader (Big Data Plotting)
If you try to plot 10 million points with Matplotlib or Seaborn, your computer will freeze. It tries to draw 10 million individual circles, which…
AI Project: Real-Time Object Detection on Your Laptop (YOLOv8)
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…
How to Fix: TypeError: argument of type ‘int’ is not iterable
This error looks similar to loop errors, but it targets a specific mistake — using the in operator against a plain number. The TypeError: argument…
Modern Data Lakes: Reading and Writing Delta Tables with Polars
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…
AI Project: Run Llama 3 on Your Laptop (with llama-cpp-python)
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…
How to Fix: ModuleNotFoundError: No module named ‘sklearn’ (Package Names vs. Imports)
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…
Polars Performance Tuning: 3 Tricks to Make Your Code Faster
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…
