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uv is amazing and that's exactly what should scare Python devs

uv is genuinely the best thing to happen to Python tooling in a decade. That's exactly why I'm nervous. A Rust tool, funded by venture capital, has re…

I’m sick of AI “Thinkslop” in my PRs

I started my career as a “Dessinateur Projeteur” (Design Drafter) in mechanical engineering. In that world, if your plan is off by 1mm, the part is sc…

DeepSeek vs Qwen vs Kimi vs GLM: Which One Wins My Freelance Budget?

DeepSeek vs Qwen vs Kimi vs GLM: Which One Wins My Freelance Budget? Last Tuesday I spent two hours building a client dashboard that needed AI-powered…

Day 5/30: State vs Memory in LangGraph

I recently spent a frustrating afternoon debugging a support bot built with LangGraph, watching it consistently forget the context of the conversation…

I moved 10 million rows in 9.9 seconds with pip install apitap

Last week I published apitap - an open-source engine that moves whole tables between databases. One function, no config files, no pipeline DAGs: impor…

Building an AI Accountability Coach That Knows Your Habits

I graded my own ML option forecasts. Here's the Brier score.

In May I promised — out loud, on the internet, where people can screenshot you — that I'd grade Helium's published prob_itm forecasts when the June 20…

Clearing an off grid price bug out of Polymarket's order path

This is a submission for DEV's Summer Bug Smash: Clear the Lineup powered by Sentry . Project Overview Polymarket ships a unified Python SDK, py-sdk ,…

From Documents to Intelligent Answers: Building a RAG Agent from Scratch & Lessons Learned

Artificial Intelligence applications are rapidly moving beyond simple question-answering systems. Modern enterprise AI assistants need to understand i…

I Cut My AI API Bill by 95% — Here's How You Can Too

I gotta say, i Cut My AI API Bill by 95% — Here's How You Can Too Picture this: it's a Tuesday morning, I'm staring at my dashboard, and my jaw is on …

About that 'your 997 says rejected but not why' problem...

Somebody on Reddit posted about 997s that just say AK5*R*5 — one or more segments in error — no AK3 , no AK4 . Preach. That's the problem this free do…

Transcribe Audio to Text Like a Developer: From File to Final Text

You've got a two-hour architecture review sitting in your Downloads folder. Last month, mine was a 94-minute mess where three engineers talked over ea…

How to Transcribe Audio to Text: A Practical Workflow for Developers

You've got a 45-minute meeting recording sitting on your desktop. Maybe it's a podcast raw file, or an interview you did for a project. You need it in…

How I built a lightweight standalone behavioral anti-stealer to protect my Windows environment

Hey everyone, Tired of bloated corporate solutions eating up hundreds of megabytes of RAM just to monitor active local connections, I decided to build…

I Ran 10 AI Coding Models Through 5 Tasks: A Data Scientist's Take

I Ran 10 AI Coding Models Through 5 Tasks: A Data Scientist's Take I'll be honest — I went into this expecting a clear winner. I came out with a scatt…

Build a Local LLM Chatbot with Ollama and Python

Build a Local LLM Chatbot with Ollama and Python Build a Local LLM Chatbot with Ollama and Python Imagine typing a question into your chatbot and gett…

How I Cut My OpenAI Bill by 97% — The Full Migration Guide

How I Cut My OpenAI Bill by 97% — The Full Migration Guide I still remember the morning I opened my OpenAI dashboard and saw the damage. $487.63 gone …

Mastering FastAPI Background Tasks: Real‑World Patterns, Testing, and When to Reach for Celery

Introduction If you’ve built a FastAPI endpoint that needs to send a confirmation email, generate a PDF, or kick off a long‑running data import, you p…

Auto-Tag Your Music Library — With Confidence Scores

"Tag my whole catalogue by mood, energy and genre" is one of those jobs that sounds like a weekend script and turns into a procurement cycle. The ente…

Half-Time vs Double-Time BPM Detection: How We Fixed Spotify's Known Accuracy Gap

Run Blinding Lights by The Weeknd through Essentia's RhythmExtractor2013 . It returns 85.4 BPM. The track is famously 171 BPM — one of the most-played…

Automating Production: A CI/CD Pipeline for Google Cloud Run with GitHub Actions

Introduction In the last guide , we deployed our FastAPI app to Google Cloud Run manually. It worked, but "manual" is a dirty word in modern engineeri…

Build a Harmonic DJ Set Planner in 50 Lines

When Spotify deprecated audio_features and audio_analysis , the obvious loss was the per-track numbers — tempo, key, energy. The quieter loss was ever…

The Spotify /recommendations Replacement

When people talk about the Spotify Web API deprecations, they usually mean audio_features and audio_analysis — the per-track numbers. But the same Nov…

FastAPI WebSockets: Production-Ready Setup and Scaling

FastAPI websockets let you push data to a client the moment it changes, without the overhead of polling. In a few lines you can expose a bidirectional…

A Practical Guide to Proxies for Web Scraping (with Python examples)

If you have written more than a couple of scrapers, you already know the pattern. The first few hundred requests fly through. Then responses slow down…

Memoization from First Principles: Building and Tracing a Cache

Understanding memoization by implementing it manually and watching the cache state change alongside each recursive call. Memoization is one of those c…

React Native + Expo JWT Auth with FastAPI — A Complete Working Example

Most FastAPI JWT tutorials stop at "here's how you issue a token" and never cover the parts that actually break in production: where to store the toke…

I Made My Voice Agent Feel Faster by Streaming Sentences, Not Audio

The annoying thing about voice agents is that “the model is fast” does not mean the experience is fast. I had a small voice assistant running on a loc…

How to Scrape Trip.com and Ctrip Hotel Reviews in 2026 (Python + a No-Code Shortcut)

Most "Trip.com scrapers" only see half the picture. Trip.com is the international brand, but the same hotel usually has a much larger pool of reviews …

How to Scrape G2 Reviews in 2026 (Python + a No-Code Shortcut)

If you have tried to scrape G2 reviews with a quick requests.get() , you already know how it goes: a 403 , a CAPTCHA, or a blank page. G2 is one of th…