PyCoder’s Weekly

Issue #740: Pluggy, ABCs, Scrapy Extensions, and More (2026-06-23)

2026-06-23T19:30:00+00:00

#740 – JUNE 23, 2026
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Plugins Case Study: Pluggy

Pluggy is an open source plugin system used by frameworks such as pytest and tox. This article introduces you to how it works and what you can do with it.
ELI BENDERSKY

Implementing Interfaces in Python: ABCs and Protocols

Learn how to implement interfaces in Python using abstract base classes, Protocols, and duck typing, and enforce method contracts cleanly.
REAL PYTHON

Quiz: Implementing Interfaces in Python: ABCs and Protocols

REAL PYTHON

Production Monitoring for Python Apps — Built by Developers, Not Suits

Error tracking, intelligent logging, and Just Enough APM™ in one tool. Our founders Ben and Josh built Honeybadger to fix their own production headaches. They think it can fix yours too — and they’ll personally write back if you hit a snag. Try Honeybadger Free!
HONEYBADGER sponsor

How to Build Your First Scrapy Extension

Scrapy is a great extensible web scraping python framework, here’s how to make it better with plugins.
AYAN PAHWA • Shared by Ayan Pahwa

PSF Board Election Dates for 2026

PYTHON SOFTWARE FOUNDATION

PEP 835: Shorthand Syntax for Annotated Type Metadata (Added)

PYTHON.ORG

Large Number of PEPs Marked Final

As part of the 3.15 beta, a significant number of PEPs have been moved to “Status: Final”: PEP 753, 668, 687, 691, 699, 701, 703, 728, 753, 770, 773, and 829. For more details see the list of PEPs.
GITHUB.COM/PYTHON

Announcing the Search for a DSF Executive Director

DJANGO SOFTWARE FOUNDATION

PyData London 26 Videos Released

YOUTUBE.COM

Articles & Tutorials

Python 3.14 Garbage Collection Rigamarole

Python 3.14.0 introduced a new incremental garbage collector. But reports of higher memory usage caused the Python team to revert the garbage collector changes in 3.14.5. This post covers how memory management works in Python and workloads that perform best and worst for the incremental garbage collector.
PIERRE ZEMB

Choosing a Python Task Queue Library in 2026

This post compares the Python task queue libraries worth considering in 2026: Celery, Dramatiq, FastStream, Taskiq, and Repid. The comparison covers broker support, async behavior, benchmark results, and the places where they differ.
ALEKSANDR SULIMOV • Shared by Aleksandr Sulimov

Are Insecure Code Completions a Vulnerability?

Seth tries out the PyCharm “Full Line Completion” plugin that uses a deep learning model to suggest lines of code, and is concerned about the results. Many of the suggestions were for code that turns off security features.
SETH LARSON

Everything Security at PyCon US 2026

This post to the PSF blog summarizes all things security related at PyCon US 2026. It includes the first talk at the security track, updates to how the PSF deals with security, the OSS security space, and more.
STHE LARSON

Why Dependency Management Trips Up New Developers

A mix of opinion piece and practical advice, this post talks about Python dependency management, virtual environments, Docker, and why setup issues frustrate so many new developers.
ETHAN CARVER

Context Engineering for Python Codebases

Learn how context engineering shapes what your AI coding agent sees on every turn, and use four practical strategies to keep your Python projects on track.
REAL PYTHON

Quiz: Context Engineering for Python Codebases

REAL PYTHON

Building Python Skills for the Job Market

Learn which Python skills employers value most and how to build them, using a skill roadmap worksheet, weekly practice plan, and interview prep tips.
REAL PYTHON course

Quiz: Building Python Skills for the Job Market

REAL PYTHON

Run Modified Python Code Using the AST Module

How to work with Python’s Abstract Syntax Tree (AST), a foundation of many metaprogramming techniques, and how this can be valuable in the age of AI
ALEX HALL • Shared by Alex Hall

Make Your SciPy Presentation in Quarto

Quarto is built for scientific presentations. Here’s how to build your next SciPy (or any conference) talk as a Quarto slide deck.
ISABELLA VELÁSQUEZ • Shared by Isabella Velásquez

Projects & Code

Events

Weekly Real Python Office Hours Q&A (Virtual)

June 24, 2026
REALPYTHON.COM

PyDelhi User Group Meetup

June 27, 2026
MEETUP.COM

Python Sheffield

June 30, 2026
GOOGLE.COM

Python Southwest Florida (PySWFL)

July 1, 2026
MEETUP.COM

STL Python

July 2, 2026
MEETUP.COM

Canberra Python Meetup

July 2, 2026
MEETUP.COM

Happy Pythoning!
This was PyCoder’s Weekly Issue #740.
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Issue #739: JIT Delayed, Sandboxes, OpenRouter, and More (2026-06-16)

2026-06-16T19:30:00+00:00

#739 – JUNE 16, 2026
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Steering Council Announcement Regarding the JIT

The Python Steering Council has announced that the work on the JIT needs to be paused until a new PEP gets written. There are many unresolved questions about the approach and integration with other tools and the work on the JIT has reached a stage where these questions need to be answered. Additional discussion
PYTHON.ORG

Python in a Sandbox With MicroPython and WASM

Simon’s been in search of the perfect code sandbox. This article is about his latest attempt and covers why he wants a sandbox and what tech he’s used to achieve it.
SIMON WILLISON

Wallaby for Python runs Tests as you Type and Streams Results Next to Code, Plus AI Context

Wallaby brings pytest / unittest results, runtime values, coverage, errors, and time-travel debugging into VS Code, so you can fix Python faster and give Copilot, Cursor, or Claude the execution context they need to stop guessing. Try it free, now in beta →
WALLABY sponsor

Accessing Multiple AI Models With the OpenRouter API

Access models from popular AI providers in Python through OpenRouter’s unified API with smart routing, fallbacks, and cost controls.
REAL PYTHON course

Quiz: Accessing Multiple AI Models With the OpenRouter API

REAL PYTHON

`scikit-learn` 1.9 Released

SCIKIT-LEARN.ORG

Python 3.14.6 and 3.13.14 Released

PYTHON.ORG

Articles & Tutorials

Skip Jupyter’s Hidden State: Reactive Notebooks With Marimo

Marimo is a reactive Python notebook designed to make data science workflows more reproducible. This article shows how it avoids hidden execution state, saves notebooks as plain .py files for cleaner Git diffs, isolates dependencies with uv, supports pytest cells, and exports notebooks into reusable formats including scripts, HTML, and WASM dashboards.
CODECUT.AI • Shared by Khuyen Tran

EuroPython 2026: Celebrating 25 Years

What’s happening at EuroPython 2026? The conference celebrates its 25th anniversary this year in Kraków, Poland. This week on the show, organizers Mia Bajić and Daria Linhart Grudzien join me to discuss this year’s conference.
REAL PYTHON podcast

SQLPyHelper: Unified DataBase API

SQLPyHelper is a Python library that provides a unified API across SQLite, PostgreSQL, MySQL, SQL Server, and Oracle. It has async support for FastAPI, cross-database migration, connection pooling, and transactions.
DEV.TO • Shared by Adebayo Olaonipekun

Stroll Down Startup Lane

PyCon’s Startup Row is a stretch of booths where early-stage companies built on Python show off what they’re creating. In this episode, Talk Python interviews a host of folks from this year’s booths.
TALK PYTHON podcast

Pyodide 314.0 Release

This post announces the Pyodide 314.0 release and describes its features, including a focus on standardization and packaging. You can now build Pyodide wheels and post them to PyPI.
PYODIDE.ORG

The Smallest Brain You Can Build

A perceptron explained from scratch in Python, with interactive demos. Learn weights, bias, the decision boundary, epochs, learning rate, and why you normalize data.
DEVARSH RANPARA

Are You Expected to Run 5 Type-Checkers Now?

Library maintainers may feel overwhelmed by the plurality of type checkers that exist. We offer some guidance on how to focus their efforts where they matter most.
MARCO GORELLI

How to Tell if Your Python Mock Is Actually Working

A test that passes because the real API returned an error is not a passing test. Here’s how to verify your mock is intercepting, and fix it when it isn’t.
BOB BELDERBOS

Cursor vs Windsurf: Which AI Code Editor Is Best for Python?

Compare Cursor vs Windsurf for Python across code completion, multi-file editing, and debugging to choose the right editor for your workflow.
REAL PYTHON

Tricky Python Quiz

A tricky Python quiz game about surprising edge cases, weird outputs, and traps with questions from the popular WTFPython GitHub repo.
ADARSHD.DEV • Shared by Adarsh Divakaran

Free Threading Internals: Deferred Reference Counting

This is a follow up to Victor’s article on reference counting covering more complex counting mechanisms including immortal objects.
VICTOR STINNER

Projects & Code

Relier: Zero-Job-Loss Reliability Layer for Celery

GITHUB.COM/GETRELIER • Shared by Kolade Fajimi

uuid-utils: Rust-Based Replacement for Python’s UUID

GITHUB.COM/AMINALAEE • Shared by Amin

pytrendy: Trend Detection in Time Series Data

GITHUB.COM/RUSSELLSB

django-deploy-probes: Django Health & Startup Endpoints

GITHUB.COM/EMFPDLZJ • Shared by minjeong bak

NumCircBuf: High-Performance Numerical Circular Buffers

GITHUB.COM/BASIMALI-AI • Shared by Syed Basim Ali

Events

Weekly Real Python Office Hours Q&A (Virtual)

June 17, 2026
REALPYTHON.COM

How CPython Works on Android

June 18, 2026
LUMA.COM • Shared by Adarsh D

PyData Bristol Meetup

June 18, 2026
MEETUP.COM

PyLadies Dublin

June 18, 2026
PYLADIES.COM

Python for (Almost) Everything

June 18 to June 19, 2026
MEETUP.COM

PyCon Singapore 2026

June 19 to June 22, 2026
PYCON.SG

Happy Pythoning!
This was PyCoder’s Weekly Issue #739.
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Issue #738: sleep(), Polars Workflows, Iterators, and More (2026-06-09)

2026-06-09T19:30:00+00:00

#738 – JUNE 9, 2026
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Python `sleep()`: How to Add Time Delays to Your Code

Learn how to use Python’s sleep() function to add time delays and pause your code with time.sleep(), decorators, threads, and asyncio.
REAL PYTHON

Libraries for Your Python Polars Workflows

Four excellent libraries for your data science workflow with support for Polars DataFrames
ISABELLA VELÁSQUEZ • Shared by Isabella Velásquez

B2B AI Agent Auth Support

Your users are asking if they can connect their AI agent to your product, but you want to make sure they can do it safely and securely. PropelAuth makes that possible →
PROPELAUTH sponsor

Down the Iterator Rabbit Hole

Following the trail when you have a chain of iterators
STEPHEN GRUPPETTA

PEP 833: Freezing the HTML Simple Repository API (Accepted)

PYTHON.ORG

PEP 800: Solid Bases in the Type System (Final)

PYTHON.ORG

PEP 798: Unpacking in Comprehensions (Final)

PYTHON.ORG

Python 3.15.0b2 Released

PYTHON.ORG

Django Security Releases Issued: 6.0.6 and 5.2.15

DJANGO SOFTWARE FOUNDATION

Articles & Tutorials

olmOCR-2 vs PaddleOCR-VL: Which Extracts PDF Tables Better?

Compare olmOCR-2 and PaddleOCR-VL on a real arXiv PDF with dense technical tables. This article walks through a Python-based OCR workflow, then evaluates how each model handles table detection, runtime, numeric accuracy, merged cells, and multi-tier headers.
KHUYEN TRAN • Shared by Khuyen Tran

Using Typing in Python Leads to Different Sorts of Code

Chris has been moving lots of code from Python 2 to 3 and experimenting with more rigid type hints as he goes along. He’s found that keeping the type checker happy makes him write code in a different way, almost like writing in a second language.
CHRIS SIEBENMANN

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