PyCoder’s Weekly

Issue #748: Line Breaks, OpenCode, Segfaults, and More (2026-08-18)

2026-08-18T19:30:00+00:00

#748 – AUGUST 18, 2026
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Breaking Up (Lines) Is Hard to Do

Here’s a seemingly simple question: given a chunk of multi-line text, how do you split it and return an array? Unicode makes everything harder than it might first seem.
B-LIST.ORG

Coding With OpenCode: AI-Assisted Python

Learn how to use OpenCode for AI-assisted Python coding, using a free Gemini API key to analyze and refactor code right in your terminal.
REAL PYTHON course

Quiz: Coding With OpenCode: AI-Assisted Python

REAL PYTHON

The Top Open-Source Code Reviewer on Code-Review-Bench

PR-AF places #2 of 42 overall on Martian’s Code-Review-Bench, ahead of CodeRabbit, Copilot, and Devin. Roughly 3x more valid findings than the commercial tools, at ~10x lower cost per review. Verified findings only. Apache 2.0, self-hosted, runs on any open or closed model. Star & Deploy →
AGENTFIELD sponsor

Two Lines of Python That Segfault the Interpreter

Two lines of plain Python segfaulted every CPython with lazy annotations: PEP 749 gave SET_ADD an operand that user code can rebind.
TIMOFEI IVANKOV • Shared by Timofei Ivankov

Articles & Tutorials

OAuth 2.0 in Python: The Authorization Code Flow Explained

OAuth’s authorization code flow, explained from the four roles up: the redirect, the code-for-token exchange, state, PKCE, and refresh tokens, with a complete runnable Python script and a table of the OAuth errors you’ll actually hit.
ENDPOINT51.COM • Shared by Simon O’Connor

The Problem With pandas Isn’t Performance

This opinion piece argues that pandas’ biggest everyday cost is often cognitive overhead rather than execution time and explores whether a backend-independent data-analysis DSL could reduce it
NEAL HUGHES • Shared by Neal Hughes

🐍 Object-Oriented Python, Taught Live

The Object-Oriented Python live cohort begins August 24. Five 2-hour Zoom sessions Mon to Fri build one growing application end to end, with OOP features introduced as the code starts needing them: classes, the data model, inheritance vs composition, properties, dataclasses. Learn more →
REAL PYTHON sponsor

Security of Everything at PyCon 2026

This year’s PyCon US added a dedicated security track. Talk Python interviews some of the key folks from the center of it: Juanita Gomez, Mike Fiedler, and Seth Michael Larson.
TALK PYTHON podcast

The HTML Representation of the Index API Is Now Frozen

‘PyPI has adopted PEP 833, which “freezes” the HTML representation of the index API, which is also sometimes called the “simple API” or the “simple repository API.”’
PYPI.ORG

How to Integrate OpenTelemetry With a FastAPI App

Learn how to integrate OpenTelemetry with a FastAPI app in Python to instrument endpoints, export traces, add custom spans, and correlate logs.
REAL PYTHON

Quiz: How to Integrate OpenTelemetry With a FastAPI App

REAL PYTHON

Qt Designer and Python: Build Your GUI Applications Faster

Learn how to use Qt Designer to build Python GUIs with PyQt6. Create your main windows and dialogs visually, then load them in your app.
REAL PYTHON

Admin Form Injection

Learn about a hidden Django admin feature for passing values between pop-up windows on the web.
TIM SCHILLING

Caller-Specific Coverage

An idea for a new feature for coverage measurement: per-caller coverage
NED BATCHELDER

Projects & Code

pytest-leak-finder: Find Leaking Test Before the One That Fails

GITHUB.COM/MGAITAN

num2words: Convert Numbers to Words. 42 –> Forty-Two

GITHUB.COM/SAVOIRFAIRELINUX

marimo-book: Static Site Generator for `marimo` Notebooks

GITHUB.COM/LJCHANG

pyrig: Aautomate Python Project Setup

GITHUB.COM/WINIPEDIA • Shared by Winipedia

cog: Embedded Graph Database for Python

GITHUB.COM/ARUN1729

Events

Weekly Real Python Office Hours Q&A (Virtual)

August 19, 2026
REALPYTHON.COM

PyCon Ghana 2026

August 20 to August 23, 2026
PYCON.ORG

PyCon Latam 2026

August 20 to August 24, 2026
PYLATAM.ORG

PyLadies: Getting Started With Tabular Foundation Models With TabPFN

August 20, 2026
MEETUP.COM

PyData Bristol Meetup

August 20, 2026
MEETUP.COM

OSS Security Meetup: Mike Fiedler, PyPI Safety and Security Engineer

Wednesday, August 26
LUMA.COM • Shared by Mila Zhou

PyCon JP 2026

August 21 to August 24, 2026
PYCON.JP

DjangoCon US 2026

August 24 to August 29, 2026
DJANGOCON.US

PyCon AU 2026

August 26 to August 31, 2026
PYCON.ORG.AU

PyCon PL 2026

August 27 to August 31, 2026
PYCON.ORG

PyCon Kenya 2026

August 28 to August 30, 2026
PYCON.KE

PyCon Togo 2026

August 28 to August 30, 2026
PYTOGO.ORG

Happy Pythoning!
This was PyCoder’s Weekly Issue #748.
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Issue #747: Modern OOP, bisect, Django Async, and More (2026-08-11)

2026-08-11T19:30:00+00:00

#747 – AUGUST 11, 2026
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New Book: Modern Object-Oriented Python

Real Python’s new book on classes, Python’s data model, and object-oriented design is out in Early Access. Nine chapters collected from a decade of tutorials, re-edited into one curriculum, and updated for today’s Python.
REAL PYTHON

Binary Search in Python With `bisect`

Python’s bisect module implements binary search for you. Here’s how bisect_left, bisect_right, and insort work, plus recipes for finding the closest match or all values in a range.
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

Updates on Django’s Async Story

For years, “Django and async” came with an asterisk. The docs themselves warned you off it, but that has changed. Talk Python interviews Carlton Gibson and they talk async in Django.
TALK PYTHON

PEP 841: Adding Frozen Syntax to Optimize Immutable Types (Draft)

PYTHON.ORG

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

PYTHON.ORG

PEP 828: Supporting ‘Yield From’ in Asynchronous Generators (Accepted)

PYTHON.ORG

PEP 837: Extensible JSON Serialization (Draft)

PYTHON.ORG

Python 3.14.7 and 3.13.15 Released

PYTHON.ORG

Django 6.1 Released

DJANGO SOFTWARE FOUNDATION

Articles & Tutorials

Take the 2026 Python Typing Survey

Now in its third year, the Python Typing Survey has become a recognised reference point for the direction of Python’s type system. It’s being referenced in PEPs and presentations to the Python community. Whether you’re an experienced user of Python types or someone who hasn’t yet written your first type annotation, participating in this survey helps the open-source community make Python better for everyone.
SURVEYMONKEY.COM • Shared by Abby Mitchell

Hydra for Python Configuration: Build Modular and Maintainable Pipelines

Hardcoded paths and parameters can quickly drift out of sync across a data science project’s scripts. This article shows how to move them into Hydra configuration files, access values with dot notation, override settings from the command line, swap entire configuration groups, and run experiment sweeps with a single multirun flag.
CODECUT.AI • Shared by Khuyen Tran

📘 Modern Object-Oriented Python: Write Clean, Pythonic Code With OOP

Learn to design classes that feel native to Python: special methods, inheritance vs. composition, properties, data classes, and the SOLID principles. Get Your Copy →
REAL PYTHON sponsor

`asyncio.all_tasks()` Could Silently Drop Tasks on the Free-Threaded Build

A concrete example of how free-threading turns old GIL-era assumptions into silent bugs: asyncio.all_tasks() dropping live tasks from another thread. Useful for anyone porting or debugging code under the free-threaded build. Written by the author of the fix.
DEADLOVELLL.GITHUB.IO • Shared by Timofei Ivankov

Celery: From First Task to Advanced Recipes

Celery is a mature distributed task queue for Python, but many practical details aren’t immediately obvious from the documentation. This guide goes from the basic usage to timeouts, retries, preventing parallel execution, and emulating async/await support.
STANISLAV GOLEV • Shared by Stanislav Golev

Programmatically Developing LLM Prompts With DSPy

How can you move from manually writing prompts for an LLM application toward defining them programmatically? This week on the show, Brett Kennedy returns to discuss his new book “Building LLM Applications with DSPy.”
REAL PYTHON podcast

Nifty Django Feature: `setUpTestData`

The setUp() call in TestCase gets invoked for every single test. Django adds setUpTestData() which only gets called once per test class, meaning your tests can run faster.
TIM SCHILLING

Thoughts on “SIMD in Pure Python”

This article is a response to SIMD in Pure Python and discusses ways of optimizing his code even further.
ALISA SIRENEVA

Since When? Which Python Version Added That

An interesting tool where you paste Python into it to see which version added each feature it uses, or look up a single built-in, module, or piece of syntax.
PYTHONMORSELS.COM

Validating Data With Pointblank in Python

Learn how to validate data in Python with Pointblank: declare quality checks, split clean from failing rows, and rerun validation plans from YAML.
REAL PYTHON

Quiz: Validating Data With Pointblank in Python

REAL PYTHON

Acidica

Ned has written a toy BASIC interpreter in Python. This announcement post tells you why (“for fun”) and talks about the accomplishment.
NED BATCHELDER

Some More Things About Django I’ve Been Enjoying

Julia has been learning Django to create websites in “2010 style”. This post talks about new things she’s picked up along the way.
JULIA EVANS

Sending Emails Using Python

Learn how to send emails with Python using SMTP and smtplib, attach files, format HTML messages, and personalize bulk emails.
REAL PYTHON course

Quiz: Sending Emails Using Python

REAL PYTHON

Projects & Code

xy: Ultra-Fast and Customizable Python Charts

GITHUB.COM/REFLEX-DEV

autowt: A Better `git` Worktree Experience

GITHUB.COM/IRSKEP

vscode-marimo: `marimo` Vscode Extension

GITHUB.COM/MARIMO-TEAM

commerce: Opensource E-Commerce Platform

GITHUB.COM/SPWIG

Build and Inspect Python Packages in GitHub Actions

GITHUB.COM/HYNEK

Events

Weekly Real Python Office Hours Q&A (Virtual)

August 12, 2026
REALPYTHON.COM

Python Nordeste 2026 (PyNE 2026)

August 13 to August 16, 2026
PYTHONNORDESTE.ORG

Python Help: Problems to Solutions

August 13, 2026
NONE

Python Atlanta

August 13 to August 14, 2026
MEETUP.COM

PyCon Korea 2026

August 15 to August 18, 2026
PYCON.KR

DjangoCologne

August 18, 2026
MEETUP.COM

PyCon Ghana 2026

August 20 to August 23, 2026
PYCON.ORG

PyCon Latam 2026

August 20 to August 24, 2026
PYLATAM.ORG

PyCon JP 2026

August 21 to August 24, 2026
PYCON.JP

Happy Pythoning!
This was PyCoder’s Weekly Issue #747.
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[ Subscribe to 🐍 PyCoder’s Weekly 💌 – Get the best Python news, articles, and tutorials delivered to your inbox once a week >> Click here to learn more ]

Issue #746: Free-Threaded NumPy, all, PyTorch, and More (2026-08-04)

2026-08-04T19:30:00+00:00

#746 – AUGUST 4, 2026
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Scaling NumPy on Free-Threaded Python

A recap on the work done in NumPy and CPython to make multi-threaded NumPy workloads scale on the free-threaded build of CPython.
KUMAR ADITYA

Managing Imports With Python’s `all`

Learn how Python’s dunder all variable controls wildcard imports and shapes the public API your packages and modules expose.
REAL PYTHON course

Quiz: Managing Imports With Python’s `all`

REAL PYTHON

Open Source Just Reached Frontier Code Review

An open-source code reviewer just outranked leading closed models. pr-af places #2 of 42 on Code-Review-Bench. The open-source harness plans a custom review per PR, runs reviewer agents in parallel, and verifies every finding against your source before posting inline comments. About 10x cheaper. Star & Deploy
AGENTFIELD.AI sponsor

PyTorch Tutorial for Deep Learning

This article provides a guide for developers with basic Python knowledge looking to explore deep learning using PyTorch.
EVGENIA VERBINA

Announcing PSF Fellow Members for Q2 2026

PYTHON SOFTWARE FOUNDATION

PEP 842: Module Exports

PYTHON.ORG

Articles & Tutorials

Introducing `django-crawl`

During a recent site migration, Adam used the Django test harness to crawl his site looking for missing security headers. In the process he uncovered seven other bugs for a project that had 100% code coverage. He has consolidated the crawling technique for testing into a library: django-crawl.
ADAM JOHNSON

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PyCoder’s Weekly

Issue #748: Line Breaks, OpenCode, Segfaults, and More (2026-08-18)

Articles & Tutorials

Projects & Code

Events

Issue #747: Modern OOP, bisect, Django Async, and More (2026-08-11)

Articles & Tutorials

Projects & Code

Events

Issue #746: Free-Threaded NumPy, __all__, PyTorch, and More (2026-08-04)

Articles & Tutorials

Projects & Code

Events

Issue #746: Free-Threaded NumPy, all, PyTorch, and More (2026-08-04)