📝 Latest Python Articles on Dev.to

One line of math froze my AI agent forever. The timeout watched and did nothing.

This is my second entry for the DEV x Sentry Bug Smash challenge. Entry #1 was a crash with a......

• ✍️ Author: Himanshu Kumar
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: devchallenge, bugsmash, python, ai

Two ways to reuse a privileged CI token (and my rule only caught one)

A GitHub Actions security rule that only caught half its vulnerability class, the design mistake behind it, and why checking for something missing is harder than checking for something bad....

• ✍️ Author: Kiell Tampubolon
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: security, devops, opensource, python

Porting a 128-expert MoE (Gemma-4 26B-A4B) to AWS Inferentia2 — where every rank weighted the wrong experts

The MoE was the hard one: a dual-path FFN, a sparse expert loop that won't trace, and a bug where the device output was empty while the CPU reference was perfect and every unit test passed....

• ✍️ Author: xbill
• 👍 Reactions: 2 | 💬 Comments: 0
• 📅 Published on: 7/17/2026
• 🏷 Tags: machinelearning, aws, ai, python

My Inferentia port matched its reference token-for-token — and still output garbage

Porting Gemma-4 31B (dense) to AWS Inferentia2: the tensor-parallel recipe that worked at 12B collapses at 31B, NxD ModelBuilder saves it — and then a passing validation lies to your face....

• ✍️ Author: xbill
• 👍 Reactions: 1 | 💬 Comments: 0
• 📅 Published on: 7/17/2026
• 🏷 Tags: machinelearning, aws, ai, python

I Built a Deep Learning Framework from Scratch in C++ and CUDA (And Beat PyTorch's Speed Multiple Run)

If you work in AI today, you are almost certainly using PyTorch or TensorFlow. They are incredible......

• ✍️ Author: Aarav Aggarwal
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: machinelearning, cpp, python, opensource

Building and Deploying a Role-Based Django PWA: From Starter Template to Production

I recently built a full volunteer-opportunity board on top of a Django starter template — complete......

• ✍️ Author: ian otieno
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: django, python, webdev, showdev

A Spend Cap That Stops Counting Is Already Fail-Open

A spend cap that stops counting is already fail-open. When the cost oracle goes quiet, the question is whether the ledger keeps moving. Five strategies....

• ✍️ Author: Alexey Spinov
• 👍 Reactions: 1 | 💬 Comments: 4
• 📅 Published on: 7/19/2026
• 🏷 Tags: ai, agents, python, llm

A Python Toolchain Built for the Agentic Engineering Era

I have to admit: I have never been a huge fan of pre-commit hooks. I always felt they were slow and......

• ✍️ Author: Rafael Pierre
• 👍 Reactions: 1 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: ai, programming, python, productivity

Set membership is not pairing: a property test that was green for the exact bug it was written to catch

I have a small board that tracks 16 LLMs across 5 labs on a frozen 35-task suite. The charts are the......

• ✍️ Author: Erik Hill
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: testing, python, softwareengineering, llm

Building and Understanding Basic Retrieval-Augmented Generation (RAG) System

Generative AI models are powerful, but they have one major limitation—they only know what they were......

• ✍️ Author: Nimesh Panda
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: ai, python, rag, gemini

I built a local, keyless Firecrawl for Claude Code — here's why published: false

A language model pays for every token of nav, ads, and footer it reads. That one sentence is the......

• ✍️ Author: Nate Nelson
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: python, ai, opensource, mcp

PyGo: A Deep Learning Framework Where Go Calls Python Calls C++

[Project] PyGo – embedding CPython inside a Go process to build a deep learning framework I've been......

• ✍️ Author: Sarkar-AGI
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: deeplearning, go, python, showdev

Constrained Decoding vs Post-hoc Validation: Production LLM Extraction Needs Both

Constrained decoding keeps an LLM closer to the target format, but it does not replace deterministic validation. Here's where each one fits in a production extraction pipeline....

• ✍️ Author: Hitarth Desai
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: ai, llm, mlops, python

Your LLM can't actually watch video. Here's the smallest fix (MIT)

Every model card says "multimodal". Then you hand the model a real video file and discover what that......

• ✍️ Author: Leo Huang
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: ai, python, llm, opensource

Building a Self-Healing GitHub Trending API in One Day

What happens when you refuse to accept "the source is down" as an answer. The problem GitHub's......

• ✍️ Author: Pool Guard
• 👍 Reactions: 1 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: python, fastapi, opensource, showdev

Grading free-form Japanese answers with an LLM: Django + pydantic-ai

I'm studying for the JLPT (aiming for N2 this cycle), and the thing that kept bugging me about every......

• ✍️ Author: Great Sage
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: japanese, python, django, ai

#07 – Pythonic Code & Standard Library

Welcome to Day 7! Today, we bridge the gap between just writing code that works and writing code that......

• ✍️ Author: Thiruvengadam Sakthivel
• 👍 Reactions: 1 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: python, ai, productivity, programming

My Blog Had 20 Unanswered Comments Across 35 Posts. Nothing Ever Told Me.

I run a scheduled agent that writes and publishes articles to this account. It's been going since......

• ✍️ Author: Enjoy Kumawat
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: ai, productivity, python, devtools

One Missed Test Case Cost Me 8 Hours — How I Built a Zero-Regression Memory Test Suite with Pytest + Docker

I got woken up by an alert call at 2 a.m. – the production chatbot had suddenly developed “amnesia.”......

• ✍️ Author: BAOFUFAN
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: python, programming

Cross-Lingual Entity Resolution: Why Your Knowledge Graph Has Four Samsungs

Cross-lingual entity resolution is where knowledge graphs quietly break down. I ran into this......

• ✍️ Author: Tae Kim
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: entityresolution, knowledgegraph, nlp, python

My AI Commit Script and My MCP Tool Run the Exact Same Code. Only One of Them Is Agentic.

I have two ways to generate a commit message in this repo. One is git_commit.py, a 20-line script I......

• ✍️ Author: Enjoy Kumawat
• 👍 Reactions: 0 | 💬 Comments: 1
• 📅 Published on: 7/19/2026
• 🏷 Tags: mcp, claudecode, python, devtools

Closing the Loop: Emailing Myself When My Resume Gets Downloaded

I already had a resume download gate — email required, signed link, 15-minute expiry, presigned S3......

• ✍️ Author: Vicente G. Reyes
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/17/2026
• 🏷 Tags: django, python, testing, webdev

Build a Bloom Filter and Watch ‘Probably Present’ Become a False Positive

Learn Bloom filter tradeoffs with a standard-library Python experiment and reproducible inputs....

• ✍️ Author: Alex Chen
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: python, beginners, algorithms, testing

Day 9/30: Human-in-the-loop Agents

Improve bot reliability with human-in-the-loop agents...

• ✍️ Author: Kasi Yaswanth
• 👍 Reactions: 0 | 💬 Comments: 1
• 📅 Published on: 7/19/2026
• 🏷 Tags: langgraph, mcp, agenticai, python

Why Python's is Keyword Will Betray You If You Trust It for Equality

This is one of the most commonly misused Python features and it fails silently, which makes it......

• ✍️ Author: Ameer Abdullah
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/18/2026
• 🏷 Tags: webdev, programming, productivity, python

Friends don't let friends keep waiting for pre-commit hooks

A Python Toolchain Built for the Agentic Engineering Era ......

• ✍️ Author: Rafael Pierre
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: ai, python, ruff, uv

How to Track Crypto Whale Transactions Across 9 Blockchains with Python

Why Whale Tracking Matters When a whale moves $50M of ETH, the market notices. Learning to......

• ✍️ Author: Chainsight
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: api, crypto, python, tutorial

Why Your LLM Pipeline Is Burning 60% of Its Token Budget on Noise (and How to Fix It)

I run a lot of RAG pipelines. And for a while, I was doing what most people do: retrieve the top-k......

• ✍️ Author: Yashvardhan Thanvi
• 👍 Reactions: 0 | 💬 Comments: 2
• 📅 Published on: 7/18/2026
• 🏷 Tags: ai, python, opensource, machinelearning

Building Predictive Maintenance Systems for Aircraft Using Machine Learning

How machine learning supports aircraft maintenance using operational data. Key......

• ✍️ Author: Sam Suseelan
• 👍 Reactions: 0 | 💬 Comments: 0
• 📅 Published on: 7/18/2026
• 🏷 Tags: ai, machinelearning, linodehackathon, python

RAG for Beginners: Build a Document Q&A System with LangChain (Full Code)

RAG for Beginners: Build a Document Q&A System with LangChain (Full Code) Tags: #ai......

• ✍️ Author: Piyush Kumar Soni
• 👍 Reactions: 5 | 💬 Comments: 0
• 📅 Published on: 7/19/2026
• 🏷 Tags: ai, langchain, python, tutorial