A real Weave project that regression-tests three OpenAI models against the exact reply format your app depends on.

The post One Capital Letter Was Silently Breaking My AI Support Bot, and It Wasn't in the New Model appeared first on Towards Data Science.

I built a system that automatically discovers, verifies, and applies relevant requirements from earlier interactions without asking the user where they came from.

The post Coding Agents Don't Need Longer History — They Need Intent Continuity appeared first on Towards Data Science.

A practical guide to building, testing, and documenting SQL transformations

The post Getting started with dbt appeared first on Towards Data Science.

How to catch a payload that looks correct but isn't, using a watchdog pattern with working Python.

The post Why Most Multi-Agent Systems Fail Even When Evaluation Passes appeared first on Towards Data Science.

Why the standard groupBy function isn’t enough

The post A Practical Introduction to PySpark Window Functions appeared first on Towards Data Science.

What each one solves, and runnable code you can paste into a notebook.

The post 5 AI Skills That Will Keep Data Scientists Relevant in 2027 appeared first on Towards Data Science.

What I learned after thinking more carefully about Structured Outputs on messy, incomplete data

The post Your LLM Can Return Perfect JSON and Still Be Wrong appeared first on Towards Data Science.

How to run the backend locally with Docker or in the cloud

The post Connecting My LangGraph AI Agent to Postgres appeared first on Towards Data Science.

What a final-year project taught me about the gap between evaluation metrics and production decisions

The post I Trained Six Models for Fraud Detection, and the Best One Isn't in Production appeared first on Towards Data Science.

A practical guide to getting better code, not just more code

The post How to Work with AI Coding Agents appeared first on Towards Data Science.

Bagging hits a wall no amount of trees can break — here's the equation that explains why, and the experiment that proves it

The post Why Random Forest Needs to Be This Random appeared first on Towards Data Science.

For years, a Python developer who needed a GPU had two realistic choices: Learn NVIDIA CUDA C++ well enough to write an extension, set up a build toolchain, and...

For years, a Python developer who needed a GPU had two realistic choices: Learn NVIDIA CUDA C++ well enough to write an extension, set up a build toolchain, and maintain bindings back to Python, which most people never did; or move up the stack and let someone else’s library do it, namely PyTorch, CuPy, or RAPIDS. The second option is why the Python GPU ecosystem thrives. But it has limits.

Source

From Kaplan-Meier curves to hazard ratios with runnable Python Code throughout

The post Survival Analysis and the Cox Proportional Hazards Model: A Beginner-Friendly Guide appeared first on Towards Data Science.

A walkthrough of and the maths behind using low-capacity networks to acquire fine-grained scoring when only categorical labelling is available for training

The post Estimating from No Data: Deriving a Continuous Score from Categories appeared first on Towards Data Science.

From Kaplan-Meier curves to hazard ratios with runnable Python Code throughout

The post Survival Analysis and the Cox Proportional Hazards Model: A Beginner-Friendly Guide appeared first on Towards Data Science.

A walkthrough of and the maths behind using low-capacity networks to acquire fine-grained scoring when only categorical labelling is available for training

The post Estimating from No Data: Deriving a Continuous Score from Categories appeared first on Towards Data Science.

A controlled comparison of a top-5 RAG pipeline and a full 127,000 token prompt on the same 12 questions, same system prompt and same model. Graded blind on correctness, completeness and grounding.

The post Kimi K3’s 1M Token Context Window vs. RAG: Cost, Latency and Answer Quality appeared first on Towards Data Science.

Conceptual overview and walkthrough of a solution approach in Python

The post Jigsaw Jeeves: Building a Puzzle Assistant using Computer Vision appeared first on Towards Data Science.

A small experiment in remote SQL execution

The post Running SQL Concurrently Across Three Remote DuckDB Servers with Quack appeared first on Towards Data Science.

A preprocessing pipeline let my car price model peek at the test set before the exam, and the twelve points of R squared it cheated its way to

The post My Model Was Cheating on Its Own Test appeared first on Towards Data Science.