📝 Latest Python Articles on Dev.to

56 fault-injection tests passed. The one that injected nothing failed.

I was building a tool that detects when data quietly changes meaning — a vendor switching units, a......

• ✍️ Author: ashg2099
• 👍 Reactions: 2 | 💬 Comments: 2
• 📅 Published on: 9/13/2026
• 🏷 Tags: dataengineering, python, testing, dbt

2:47 AM: Someone Tried to Open a File on My Laptop. Here's the Log I Pulled the Next Morning.

I wasn't going to write a normal launch post. You know the format. Every "I built X" post on this......

• ✍️ Author: Akhouri Anmol Kumar
• 👍 Reactions: 6 | 💬 Comments: 1
• 📅 Published on: 9/13/2026
• 🏷 Tags: security, privacy, python, cybersecurity

A local second brain for coding agents: context, memory and gates in Weftgate 0.2

Coding agents need more than another large context dump. They need a small set of relevant source......

• ✍️ Author: Avinash Amudala
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/13/2026
• 🏷 Tags: devtools, mcp, python, showdev

Catch broken environment, import, and route connections with Weftgate

I maintain Weftgate, an open-source verification gate for coding agents. It checks......

• ✍️ Author: Avinash Amudala
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/13/2026
• 🏷 Tags: python, testing, showdev, devtools

A Telegram job alert bot in 60 lines of Python, on live ATS data

One API call, one cron entry, and a bot that sends only postings you have not seen. Numbers measured live 2026-09-13....

• ✍️ Author: Oleg Starnikov
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/13/2026
• 🏷 Tags: python, api, jobs, tutorial

AI Agent Memory: Sliding Windows, Summaries, and Vector Storage

The agent we built in Post #4 has one big problem — the moment the script ends, it forgets......

• ✍️ Author: Gokulnath P
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/13/2026
• 🏷 Tags: ai, beginners, tutorial, python

I ran my scanner against 5 real CVEs. It missed 4. Then I reverted my own fix.

Why this post is different from the last one The last write-up in this series announced four tools.......

• ✍️ Author: Hassan Balbakie
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: python, security, testing

Spider 2.0 deleted a claim I made this morning

title: Spider 2.0 deleted a claim I made this morning published: true tags: sql, ai,......

• ✍️ Author: Ashish sinha
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/13/2026
• 🏷 Tags: sql, ai, database, python

From SkillCheck to TraceMantle: Tracking Agent Skill Changes and Test Evidence

Why I expanded SkillCheck into TraceMantle to track agent skill packages, supporting files, and the test evidence used to approve changes....

• ✍️ Author: Brad Kinnard
• 👍 Reactions: 1 | 💬 Comments: 0
• 📅 Published on: 9/13/2026
• 🏷 Tags: ai, python, opensource, testing

I found an open issue on Google's own security repo, so I built the missing piece

In May 2026, Microsoft's Semantic Kernel shipped two CVEs in the same week. CVE-2026-26030 let an......

• ✍️ Author: Ajay Nyayapathi
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: ai, security, opensource, python

Why Your Backtest Is Probably Lying to You (And How ATR Fixes Half the Problem)

If you've ever backtested a trading strategy in Python, there's a good chance you've made one of two......

• ✍️ Author: Pedro Groppo
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: python, finance, algotrading, tutorial

Scikit-Learn, Pipeline Fundamentals: A Titanic Survival Prediction Guide

Machine learning workflows often suffer from code duplication, data leakage, and hyperparameter......

• ✍️ Author: Mark Glemba
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: datascience, machinelearning, python, tutorial

LangGraph versus LangChain. A conta é cadeia, grafo ou harness

Eu ia escolher um logo. Precisava saber se o fluxo é uma cadeia, um grafo com estado, ou o desk....

• ✍️ Author: Tiago Vilas Boas (Montanha)
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: ai, architecture, python, discuss

The HWP-to-Markdown Problem Nobody Talks About (and a FreeType Gotcha)

Korean .hwp files are everywhere in government, legal, and enterprise workflows in Korea — and almost......

• ✍️ Author: Doyoon Kim
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/13/2026
• 🏷 Tags: python, ai, productivity, opensource

Nobody wants to import your library

I wrote a Python library. Then I watched people not use it. Not because they disagreed with it — the......

• ✍️ Author: Ashish sinha
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: python, ai, sql, devops

My journey into tech: from traffic manager to future developer

Hey, dev.to! 👋 I'm Maycon, a Systems Analysis and Development student at UNICID, currently making a......

• ✍️ Author: Maycon Silva
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/13/2026
• 🏷 Tags: career, learning, python

Pin the Oracle Bundle Before the Agent Percentage

A coding-agent percentage is not a measurement until dataset, oracle, metrics, and environment pin......

• ✍️ Author: Avery Wang
• 👍 Reactions: 1 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: ai, testing, python, agents

I Rewrote One Function in Squirrel, Then in C. One Line of Python Was Just as Fast.

I wired cffi into my 2D Python game engine so a .c file in a folder just works. Then I looked at what I had actually been optimizing for two weeks....

• ✍️ Author: Nathan C.
• 👍 Reactions: 0 | 💬 Comments: 1
• 📅 Published on: 9/12/2026
• 🏷 Tags: python, c, gamedev, opensource

Make Fully Customizable QR Codes (Actually)

Tired of usual bland QR codes that don't show off your brand? I made a simple API to create fully......

• ✍️ Author: Monteluke
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/13/2026
• 🏷 Tags: python, api, backend, tools

What ROE Doesn't Tell You

What ROE Doesn't Tell You: A Beginner's Look at 200 US Companies' Financial Health My......

• ✍️ Author: Mustabin Neha
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: python, datascience, finance, productivity

The Ticket Stub Workshop

The projector still held a stack trace when the student hit send. Ninety minutes remained on the lab......

• ✍️ Author: Charlie Zhu
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: workshop, python, testing, ai

Retail FMCG Sales Analytics: From 100,000 Transactions to Power BI, Machine Learning, and Streamlit

Introduction Retail businesses generate large amounts of transactional data every day, but......

• ✍️ Author: Fady Desoky Saeed Abdelaziz
• 👍 Reactions: 5 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: python, powerfuldevs, machinelearning, dataanalytics

DjReframe: a lib to cut down the routine of building Django apps from scratch

I haven't been using Django for very long .I'm still early on that road. But I've always liked......

• ✍️ Author: Lord_Doug
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: webdev, python, productivity, django

Why ChatGPT Makes You Worse at Coding (and What to Do Instead)

ChatGPT can write better code than most junior developers. It can explain concepts, debug errors,......

• ✍️ Author: Ahamad Mamun Nishar Miya
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: learning, beginners, python, ai

I built an AI team that ships real work — and shows you the conversation

Most "multi-agent" demos are bots narrating to each other. The log is the product; the work is......

• ✍️ Author: horio
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: ai, opensource, python, agents

I Scored Retry Loops. Boundedness Was Optional.

Boundedness failed first. Not the model. Not the schema. The ceiling. I stopped asking whether an......

• ✍️ Author: Jordan Liu
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: ai, python, testing, agents

Safe Property Mail DNS Writer Using Read Compare and Skip Logic

Pointing a property management company's mail at a new provider should cost one DNS read when nothing......

• ✍️ Author: marcorossi4891
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/13/2026
• 🏷 Tags: dns, email, python

One Python Agent Core, Four Ways to Run It: Nova on Server, Web, TUI, and Desktop

Nova is an open source AI agent with one shared Python runtime behind an HTTP server, web UI, terminal TUI, and desktop app. Here is how it fits together and how to try it locally with Ollama....

• ✍️ Author: bigrivi
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: ai, opensource, python, llm

Why your Python tool corrupts text on Windows, and why chcp 65001 doesn't fix it

I lost an afternoon to a config file last week. The graph name was right there in the JSON, spelled......

• ✍️ Author: MilkyWay008
• 👍 Reactions: 1 | 💬 Comments: 0
• 📅 Published on: 9/12/2026
• 🏷 Tags: ai, windows, tutorial, python

How to Stage Custom Domain Cutovers in 3 Steps: Write Records or Show Them

Use the delegation boundary as the decision rule, not the customer's plan tier: write the records......

• ✍️ Author: IgnazCole6453
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 9/13/2026
• 🏷 Tags: dns, onboarding, python, saas