PyCoder’s Weekly

Issue #743: Stacks & Queues, Django F-Expressions, MCP Clients, and More (2026-07-14)

2026-07-14T19:30:00+00:00

#743 – JULY 14, 2026
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Stacks and Queues in Python

This post shows you how to use a Python list for stack operations (last-in, first-out) and a deque from the collections module for queue operations (first-in, first-out).
TREY HUNNER

Nifty Django Feature: F Expressions

Django’s F-Expression provides a way of querying fields from the ORM. They’re particularly handy to traverse relationships in more complex queries.
TIM SCHILLING

Secure Your Code, Wherever, or However You Write It

AI coding agents have blind spots, they reproduce patterns but struggle with security context. AURI by Endor Labs plugs into your editor via MCP, catching flaws, signaling exposed secrets, and spotting malicious dependencies. Ship secure by default. Try AURI Free →
ENDOR LABS sponsor

Testing MCP Servers With a Python MCP Client

Learn how to build a Python MCP client that tests MCP servers from your terminal. List their tools, prompts, and resources, then call each one.
REAL PYTHON course

Articles & Tutorials

Constructing and Judging Modern Agentic Workflows

How can you improve your LLM agent systems through specification enrichment? What are the advantages of having an LLM act as a judge within an agent system? This week on the show, Senior IEEE Member and Quality Engineer Suneet Malhotra joins us to discuss building and evaluating agentic architecture.
REAL PYTHON podcast

What `for x in y` Hides From You

An explanation of how Python’s for x in y syntax is a thin wrapper around the iterator protocol: iter(...), next(...), and StopIteration. Using examples from Memphis, a Python interpreter written in Rust, it shows how this design makes lists, ranges, and generators feel unified rather than magical.
TYLER GREEN • Shared by Tyler Green

Stop stitching 5 different systems together for your agents.

Dev teams spend weeks fitting together vector DBs, graph DBs, relational stores, filesystem primitives and optimizing cache. How about everything via a single API? P90 sub-200ms recall - the fastest graph database to unlock true agent memory, knowledge graphs and user-personalization. Click Here to Try HydraDB Out for Free
HYDRADB sponsor

Building a Fast HTML Toolkit in C for Python

turbohtml began as a patch to speed up html.escape and html.unescape in CPython. When the core team declined to maintain SIMD in the standard library, it became a third party library instead. This post is its story.
BERNÁT GÁBOR • Shared by Bernát Gábor

How to Publish to PyPI Using GitHub Actions Securely

If you’re using GitHub Actions to publish your Python libraries, this article is for you. Learn what are the best practices to ensure the process is secure and what tools you can use to validate it.
BRETT CANNON

Python 3.15’s Ultra-Low Overhead Interpreter Profiling Mode

Ken is one of the key contributors to the experimental JIT. This post talks about how Python 3.15’s interpreter profiling mode is helping them figure out what is working with the JIT and what isn’t.
KEN JIN

PEP 814: Add Frozendict Built-in Type

Victor has been involved in multiple attempts to add a frozen dict type to Python. His latest PEP has been accepted and frozen dictionaries will be added to Python 3.15. This post is his story.
VICTOR STINNER

How to Clean Messy CSV Files With Python

This introductory article shows you how to do data cleaning on CSV files using pandas, including dealing with duplicate rows, missing values, mixed date formats, and more.
ABID ALI AWAN,

PSF News: Security, Elections, and PyCon US 2026

This post is the monthly news round up of all things PSF. It covers a re-cap of PyCon US, several security fixes, updates from the PSF board, and more.
PYTHON SOFTWARE FOUNDATION

How to Use GitHub

Learn how to use GitHub step by step to create a remote repository, push your local Python project, and collaborate with others using GitHub Issues.
REAL PYTHON

Quiz: How to Use GitHub

REAL PYTHON

Projects & Code

pyStrich: 1D and 2D Barcode Generator Library

GITHUB.COM/MMULQUEEN • Shared by Michael Mulqueen

Snakie: Cross-Platform MicroPython IDE

GITHUB.COM/KEVINMCALEER

Notion2Pandas: Import Notion Databases Into pandas

GitLab.com
GITLAB.COM/JAEGER87

envgap: Find Gaps Between `.env`, Shell Env, and Python Code

GITHUB.COM/PINAK-DATTA • Shared by Pinak Datta

CLI-based Text-to-Speech Tool

GITHUB.COM/REALPACIFIC • Shared by Prashant Barahi

Events

Weekly Real Python Office Hours Q&A (Virtual)

July 15, 2026
REALPYTHON.COM

PyData Bristol Meetup

July 16, 2026
MEETUP.COM

PyLadies Dublin

July 16, 2026
PYLADIES.COM

DjangoGirls Tamale 2026

July 17 to July 19, 2026
DJANGOGIRLS.ORG

EuroSciPy 2026

July 18 to July 24, 2026
EUROSCIPY.ORG

PyData PyCon Armenia 2026

July 24 to July 26, 2026
PYCON.AM

Happy Pythoning!
This was PyCoder’s Weekly Issue #743.
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Issue #742: Wagtail as Admin, Random Values, Code Quality, and More (2026-07-07)

2026-07-07T19:30:00+00:00

#742 – JULY 7, 2026
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Wagtail as Django Admin on Steroids

Wagtail can do pretty much everything the Django Admin can do, but includes a much more modern UI and more features. This article shows you how to use Wagtail as an Admin alternative.
TIM KAMANIN

Selecting Random Values in Python

Python’s random module provides utilities for generating pseudorandom numbers. For cryptographically-secure randomness, use the secrets module instead.
TREY HUNNER

Let AI Agents Into Your B2B App. Securely.

More of your users are asking to connect AI agents to your product, and you want to say yes. PropelAuth lets you give each agent scoped, revocable access, so you stay in control of what it can do. Learn more →
PROPELAUTH sponsor

Managing and Measuring Python Code Quality

Master Python code quality tools like linters, formatters, type checkers, and profilers to measure, manage, and improve the code you write.
REAL PYTHON course

Quiz: Managing and Measuring Python Code Quality

REAL PYTHON

PEP 752: Package Repository Namespaces (Final)

PYTHON.ORG

PEP 836: JIT Go Brrr: The Path to a Supported JIT Compiler for CPython (Draft)

PYTHON.ORG

PyCon US 2026 Videos Are Up

YOUTUBE.COM

Discussions

The Path to a Supported JIT Compiler for CPython

PYTHON.ORG

Articles & Tutorials

Thinking About Running for the PSF Board? Let’s Talk!

The Python Software Foundation Board has announced two office-hour sessions dedicated to giving information on running for the PSF Board. If you’re thinking of running in the upcoming election, these sessions can help you understand the ins and outs.
PYTHON SOFTWARE FOUNDATION

Celery on AWS ECS: Complete Guide

Running Celery on AWS ECS without losing tasks and making sure that all the work is done is not as straightforward as it may seem. Learn how to configure Celery and structure your tasks for reliable processing.
JAN GIACOMELLI • Shared by Špela Giacomelli

Learn the Agentic Coding Workflow That Actually Works on Real Projects

65% of Python developers are stuck using AI for small tasks that fall apart on anything real. This 2-day live course (July 11-12 via Zoom) walks you through building a complete Python app with OpenAI’s Codex, from an empty directory to a shipped project on GitHub. See the Full Curriculum →
REAL PYTHON sponsor

Free-Threaded Python: Past, Present, and Future

This post summarizes a talk by core developer Thomas Wouters at PyCon US 2026 on Free-threaded Python: the attempt to remove the GIL. It describes why it is being done and what future work looks like.
JAKE EDGE

In Search of a New Contribution Model

This opinion piece from Carlton Gibson, a core Django contributor, talks about the state of contributions to OSS, how AI has made them more complicated, and how some key things are still broken.
CARLTON GIBSON

How to Get TIFF MetaData With Python

The Pillow image library gives you lots of tools for dealing with images. This article teaches you how to extract metadata from TIFF files in a few lines of Python.
MIKE DRISCOLL

Profile First: A 10x Faster Django Test Suite

Bob’s Django test suite took 30 seconds. cProfile showed 83% of it was one function: password hashing. Here’s how he found the bottleneck and the five-line fix.
BOB BELDERBOS

Python 3.15 Preview: Upgraded JIT Compiler

Learn how the upgraded Python 3.15 JIT compiler speeds up your code with a new tracing frontend, register allocation, and in-place numeric operations.
REAL PYTHON

Quiz: Python 3.15 Preview: Upgraded JIT Compiler

REAL PYTHON

Store Extra Data for Objects in a `WeakKeyDictionary`

In several programs Adam has wanted to solve the problem of associating extra data with an object. This article outlines his latest approach.
ADAM JOHNSON

How to Get Started With the GitHub Copilot CLI

Learn how to install, authenticate, and use the GitHub Copilot CLI to plan, write, and review Python code from your terminal with AI agents.
REAL PYTHON

Quiz: How to Get Started With the GitHub Copilot CLI

REAL PYTHON

Projects & Code

pytest-tia: Run Only the Tests Your Git Diff Actually Affects

GITHUB.COM/BREADMSA • Shared by BreadWasEaten

Sifty: OSS Windows Maintenance CLI

GITHUB.COM/VORTRIX5 • Shared by Amine Zouaoui

purejq: A Pure-Python Implementation of `jq`

GITHUB.COM/ADAM2GO • Shared by adam2go

supertree: Decision Tree Visualization

GITHUB.COM/MLJAR • Shared by Piotr Płoński

ninejs: Bringing Interactivity to Plotnine

GITHUB.COM/Y-SUNFLOWER

Events

Weekly Real Python Office Hours Q&A (Virtual)

July 8, 2026
REALPYTHON.COM

Python Atlanta

July 9 to July 10, 2026
MEETUP.COM

PyDelhi User Group Meetup

July 11, 2026
MEETUP.COM

DFW Pythoneers 2nd Saturday Teaching Meeting

July 11, 2026
MEETUP.COM

EuroPython 2026

July 13 to July 20, 2026
EUROPYTHON.EU

SciPy 2026

July 13 to July 20, 2026
SCIPY.ORG

EuroSciPy 2026

July 18 to July 24, 2026
EUROSCIPY.ORG

Happy Pythoning!
This was PyCoder’s Weekly Issue #742.
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Issue #741: Root Loggers, PEP 832, Django Tasks, and More (2026-06-30)

2026-06-30T19:30:00+00:00

#741 – JUNE 30, 2026
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Please Don’t Hijack My Python Root Logger

Some Python libraries configure the root logger at import time, which can silently override application logging choices. This article walks through the logger hierarchy, shows why libraries should use named loggers with NullHandler, and gives practical patterns that keep logging behavior under the application’s control.
REDOWAN DELOWAR • Shared by Redowan Delowar

Why I Wrote PEP 832: Virtual Environment Discovery

PEP 832 proposes a way to describe where your virtual environment is so that your tools can look in the right place. Although a relatively simple proposal it has caused some contention in the community. This post by Brett, the PEP’s author, describes his reasoning.
BRETT CANNON

An Open-Source Code Reviewer That Runs on Any LLM

Your agents open PRs faster than you can review them. pr-af is a multi-agent reviewer that drops into GitHub Actions and runs on the model you already use — open-source, self-hosted, or closed. Every finding ships with evidence. Star it on GitHub →
AGENTFIELD sponsor

Django Tasks: Exploring the Built-in Tasks Framework

Explore Django Tasks, the new built-in framework in Django 6.0, and run background jobs with @task, named queues, and a lightweight alternative to Celery.
REAL PYTHON

Quiz: Django Tasks: Exploring the Built-in Tasks Framework

REAL PYTHON

Python 3.15.0 Beta 3 Released

PYTHON.ORG

Django 6.1 Beta 1 Released

DJANGO SOFTWARE FOUNDATION

Articles & Tutorials

Astral Joins OpenAI

OpenAI recently acquired Astral, the company behind uv, Ruff, and ty. And if your first thought was ‘wait, is uv toast?’, you are not alone. Talk Python interviews Charlie Marsh and they talk about the acquisition experience and how they’re shipping more code than ever.
TALK PYTHON podcast

The Fastest Python Struct?

An adventure in Python struct benchmarking: slotted class, NamedTuple, dataclass, attrs, msgspec, record-type, and a new C extension based on record-type and msgspec. Focus is on import-time, type-construction, memory, and instantiation cost.
JP HUTCHINS

Codex for Python Developers: A Hands-on Live Course

Build a complete Python project from an empty directory with OpenAI’s Codex in this two-day live course (July 11-12). You’ll scaffold, build, debug, and ship a real CLI app using an agent that works inside your codebase. See the Full Curriculum →
REAL PYTHON sponsor

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