PyCoder’s Weekly

Issue #755: 3.15 Gets an RC3, New Feature Rundown, Sampling Profiler, and More (2026-10-06)

2026-10-06T19:30:00+00:00

#755 – OCTOBER 6, 2026
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Python Adds a Release: 3.15.0rc3

Due to issues found in the new lazy loading features, an emergency Release Candidate has been adding, delaying Python 3.15 by a week.
PYTHON.ORG

Python 3.15: Cool New Features for You to Try

Learn what’s new in Python 3.15, from lazy imports, frozendict, and sentinels to a sampling profiler and friendlier error messages. Also available as a video course.
REAL PYTHON

Quiz: Python 3.15: Cool New Features for You to Try

REAL PYTHON

Connect Python AI Agents to Real-Time ClickHouse

Give your Python AI agents and memory systems low-latency access to analytical data. Tinybird turns high-volume event streams into sub-100ms REST APIs with native Python SDKs, CLI tooling, & MCP support. Skip building data pipelines and feed real-time context directly into your Python agent workflow Start Building Free with Python SDK
TINYBIRD sponsor

Tachyon, Python 3.15’s Built-in Sampling Profiler

Talk Python interviews László Kiss Kollár and Pablo Galindo Salgado, key contributors to the new sampling profiler code named “Tachyon” which has been added to Python 3.15.
TALK PYTHON podcast

Python 3.15 Preview: Sentinel Values

Learn how to create a Python sentinel value with the new built-in in Python 3.15 and get readable signatures, type hints, and safe copying and pickling.
REAL PYTHON

Quiz: Python 3.15 Preview: Sentinel Values

Test your grasp of Python 3.15’s new sentinel built-in, from readable signatures and type hints to safe copying, pickling, and when to use one.
REAL PYTHON

Articles & Tutorials

Protocol or ABC? Designing a Pluggable Provider Interface

Designing a CLI tool that talks to two different image-generation backends. Same inputs from the user, two different SDKs underneath. How best to define the shared contract: an abstract base class, or a typing.Protocol? This article looks at both options.
BELDERBOS.DEV • Shared by Bob Belderbos

PyScript Is in Maintenance Mode

PyScript entered maintenance mode last month — the API is frozen, and only Pyodide updates continue. This piece walks through the honest landscape of Python-in-the-browser tools now that the default answer has stopped moving.
DEV.TO • Shared by Aswanth R

Stop Falling Behind on AI. Catch Up in Five Minutes

New models, new prices, new agent tools, all the time. Real Python’s new AI newsletter gives you the handful of stories you actually need as a developer. Tell us how often you want it (daily, weekly, or monthly) and save your spot. Get the Free Roundup →
REAL PYTHON sponsor

Working With AI Agents: Focused Live Courses for Python Developers

Five focused live courses for Python developers who use AI agents: predict what they’ll do, check what they wrote, direct them on a real project, run them as a team, and trust them unattended.
REAL PYTHON

Python Language Summit 2026

The 2026 Python Language Summit was hosted in Kraków, Poland as part of EuroPython 2026. There were 15 talks covering free-threading, Rust, garbage collection, type annotations, and more.
SETH LARSON

Tracing `np.add`, All the Way Down

NumPy’s add method does what you’d expect: it adds two objects together. Under the covers there is a lot going on. This deep dive shows you just what is happening behind the scenes.
VEIT HELLER

The Export Keyword (PEPs 842 and 843)

There have been multiple PEPs recently proposing different ways of managing what is and isn’t visible outside of a module. This post runs down the various proposals.
ANDRE ROBERGE

Undocumented Django: Generating a SECRET_KEY

Exploring the “hidden features” lurking in Django’s codebase that allow you to generate a secret key along with some advice on how to keep it secret.
LEARN DJANGO

Pipenv: A Guide to the Python Packaging Tool

Pipenv replaces pip, virtualenv, and requirements.txt with a single tool. See what it solves and how to manage dependencies with it.
REAL PYTHON

Object-Oriented Programming (OOP) in Python

Learn object-oriented programming in Python: the OOP paradigm, classes and inheritance, and how to instantiate objects from a class.
REAL PYTHON

Projects & Code

Ciaren: Visual ETL That Exports pandas and Polars

GITHUB.COM/CIAREN-LABS • Shared by Ciaren Labs (submitted by an assistant)

proxy-benchmark: Benchmarks for Proxies & Browsers

GITHUB.COM/NODEMAVEN • Shared by Alexandr

RightWayUp: Find Up in an Image From Python or CLI

GITHUB.COM/ORTUSAITECH • Shared by Vladimir Ilyash

Flowfile: Turn Polars Style Code Into an ETL Pipeline

GITHUB.COM/EDWARDVANEECHOUD • Shared by Edward van Eechoud

FlexViz: Interactive Exploration of 1 Billion Data Points

GITHUB.COM/FLEX-ANALYTICS • Shared by Jeroen Van Der Donckt

Events

PyCon Africa 2026

October 7 to October 12, 2026
PYCON.ORG

Weekly Real Python Office Hours Q&A (Virtual)

October 7, 2026
REALPYTHON.COM

PyEducation: IPAF

October 8 to October 9, 2026
PYCON.ORG

Python Atlanta

October 8 to October 9, 2026
MEETUP.COM

DFW Pythoneers 2nd Saturday Teaching Meeting

October 10, 2026
MEETUP.COM

PyCon Greece 2026

October 12 to October 14, 2026
PYCON.GR

PyCon NL 2026

October 15 to October 16, 2026
PYCON-NL.ORG

PyCon Taiwan

October 17 to October 19, 2026
PYCON.ORG

Happy Pythoning!
This was PyCoder’s Weekly Issue #755.
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Issue #754: Jev, PyO3, Temp Files, and More (2026-09-29)

2026-09-29T19:30:00+00:00

#754 – SEPTEMBER 29, 2026
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How to Get Started With Jev in Python

Connect a Python script to the Jev model with the TypeSafe SDK and OpenRouter, then replace brittle input checks with Noul, Score, and Choice answers.
REAL PYTHON

Quiz: How to Get Started With Jev in Python

REAL PYTHON

MCP Auth That Passes the Security Review

When your customers connect AI agents to your product, their security team will have questions. PropelAuth has the answers built in: role-gated scopes, enterprise SSO through Okta and Entra ID, phishing-resistant consent screens, and an audit log of every agent connection. Learn More →
PROPELAUTH sponsor

How Libraries Run Rust Inside Python (With PyO3)

How do libraries run Rust inside Python? It all comes down to 4 steps: 1. Write Rust code, 2. Annotate it with PyO3 macros, 3. Let maturin compile and install it, 4. Import the result. See this in action for a hand-rolled JSON parser in this article.
BELDERBOS.DEV • Shared by Bob Belderbos

Creating Temporary Files in Python

How to create temporary files and directories in Python using the tempfile module’s NamedTemporaryFile and TemporaryDirectory.
TREY HUNNER

PEP 849: More Expressive Type Expressions (Draft)

PYTHON.ORG

PEP 848: Generational Incremental Garbage Collection (Draft)

PYTHON.ORG

PyPy v8.0.0 Released

PYPY.ORG

Articles & Tutorials

Navigating AI in Open Source: Insights From Wagtail

How should you manage AI contributions to an open-source project? How do you measure the impact of using AI tools for development, and what generative features do end users want from a content management system? This week on the show, we speak with Thibaud Colas and Meagen Voss from Wagtail about the complex considerations software organizations are currently facing.
REAL PYTHON podcast

How BMLL Processes 1.5 TB of Data in Under 4 Minutes

BMLL Technologies processes petabytes of nanosecond-precision market data for the world’s most sophisticated trading teams. In this case study, they share what a 48x performance improvement from Polars over pandas looks like in practice, and what it means for execution analysis at scale.
POLA.RS

Agent Memory for Wherever Your AI Is Running

Ship VectorAI DB to your edge device, factory floor, air-gapped facility, or enterprise data center and get a portable multimodal vector database that moves with your stack. Start on a laptop, validate retrieval quality against your workload, and promote the same pattern to production. Get Started Free →
ACTIAN sponsor

Python Statistics Fundamentals: How to Describe Your Data

In this step-by-step tutorial, you’ll learn the fundamentals of descriptive statistics and how to calculate them in Python. You’ll find out how to describe, summarize, and represent your data visually using NumPy, SciPy, pandas, Matplotlib, and the built-in Python statistics library.
REAL PYTHON

EVE Online Departs for Python 3

The game EVE has run on Python 2 since it launched in 2003, all 2.4 million lines of it, on a custom Stackless interpreter that stopped at 3.8. That is in the process of changing. Talk Python interviews three EVE developers about this process.
TALK PYTHON podcast

I Is for Immutable: Python a to Z

The first thing most people learn in programming is that you can save data in variables and change their values. For Juha-Matti, learning about immutable data structures and functional programming was a painful but important shift in schema.
JUHA-MATTI SANTALA

Your Personal Python Mentor

Real Python Mentor AI works alongside you. It sees the tutorial, lesson, or exercise you’re on, knows what you’ve been learning, and helps you understand, practice, and keep moving forward.
REAL PYTHON sponsor

7 Python Mistakes Beginners Make

Some mistakes are because Python did exactly what you asked it to do. This article covers seven of them. For each one you get the hidden cause, plus the first thing worth checking.
NAHLA DAVIES

Speeding Up a Python Service With CinderX

CinderX is Meta’s CPython extension: a method JIT, Static Python, and a parallel garbage collector. The article measures all three against stock CPython 3.14 and its tier 2 JIT
TIMOFEI IVANKOV

Cursor vs Copilot: Which AI Editor Is Better for Python?

Compare Cursor vs GitHub Copilot by building a Python project, testing agent workflows, debugging code, and evaluating AI-assisted development.
REAL PYTHON

Quiz: Cursor vs Copilot: Which AI Editor Is Better for Python?

REAL PYTHON

Using the Claude API in Python

Learn how to use the Claude API in Python to send prompts, control responses with system instructions, and get structured output.
REAL PYTHON course

Quiz: Using the Claude API in Python

REAL PYTHON

Projects & Code

pyfastlogging: A Lightning Fast Logger, Written in Rust

PYPI.ORG • Shared by Martin Bammer

Renart: A Local Workspace for SQL and Python Data Pipelines

GITHUB.COM/RENART-DATA • Shared by Lukas Senicourt

Pyxel Code Maker: Retro Python Games in Your Browser

KITAO.GITHUB.IO • Shared by Takashi Kitao

flowsint: Extensible Graph-Based Investigation Tool

GITHUB.COM/RECONURGE

bashautom: Persistent, Stateful Bash Sessions for Python

GITHUB.COM/HUSKAGO • Shared by Tiago

Events

Weekly Real Python Office Hours Q&A (Virtual)

Septempber 30, 2026
REALPYTHON.COM

Real Python Live: Release Radar: Python 3.15

Septempber 30, 2026
REALPYTHON.COM

Canberra Python Meetup

October 1, 2026
MEETUP.COM

Sydney Python User Group (SyPy)

October 1, 2026
SYPY.ORG

PyBay 2026

October 3 to October 4, 2026
PYBAY.ORG

PyCon Africa 2026

October 7 to October 12, 2026
PYCON.ORG

PyEducation: IPAF

October 8 to October 9, 2026
PYCON.ORG

Happy Pythoning!
This was PyCoder’s Weekly Issue #754.
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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 #753: frozendict, pytest Plugins, re.prefixmatch(), and More (2026-09-22)

2026-09-22T19:30:00+00:00

#753 – SEPTEMBER 22, 2026
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Python 3.15 Preview: `frozendict`

Preview Python 3.15’s frozendict: build immutable mappings you can hash, cache, and share across threads, and learn where the freeze stops.
REAL PYTHON

Quiz: Python 3.15 Preview: `frozendict`

REAL PYTHON

claude -p “migrate our CI config to RWX”

Python is powering AI. Your build platform should keep up. RWX is CI/CD rebuilt for the agentic dev cycle: content-based caching, graph-based task execution, and agent sandboxes that share config and cache with CI. Teams at Honeycomb, ClickFunnels, and Verkada have already switched. See Why Engineers Love RWX → rwx.com
RWX (READWRITEEXECUTE) sponsor

pytest Plugins That Actually Change How You Test in 2026

Seven pytest plugins beyond the built-ins that changed how Peyton tests: pytest-httpx for HTTP mocking, pytest-randomly for order-dependency detection, anyio’s built-in pytest plugin for backend-agnostic async tests, syrupy for snapshot testing, pytest-watch for continuous feedback, freezegun for deterministic time, pytest-cov for coverage enforcement.
PEYTON GREEN • Shared by Anonymous

Soft-Deprecating `re.match()`

To provide consistency with other languages, Python 3.15 is soft-deprecating re.match() and introducing re.prefixmatch() instead. This article explains why.
HUGO VAN KEMENADE

PEP 847: Problem Details for the Simple Repository API (Draft)

PYTHON.ORG

PEP 846: Docstrings for Type Aliases (Draft)

PYTHON.ORG

PEP 845: Leading-Dot Value Patterns (Draft)

PYTHON.ORG

Share How You Use Django With Django Probe

TIM SCHILLING

2026 PSF Board Election Results

PYTHON SOFTWARE FOUNDATION

2026 Python Packaging Council Election Results!

PYTHON SOFTWARE FOUNDATION

Articles & Tutorials

Serve the Change Password Well-Known URL

When a password manager detects that a user’s password has been leaked, it can prompt them to change it, but the password change URL varies by site. The answer to such discovery problems is .well-known/ URL namespace. This article talks about how to build it in Django.
ADAM JOHNSON

Getting Started With Rust as Python Devs

Talk Python discusses Rust for Pythonistas with guest Christopher Trudeau. Learn why Rust is a go-to language for Python tools and extensions and how you can get started writing Python modules with PyO3.
TALK PYTHON podcast

Make Public API Tests Repeatable in Python

Network-dependent API tests can be slow and flaky. This article shows how VCR.py records real HTTP interactions once and replays them for fast, repeatable, offline tests. Use cases include GitHub API client and pytest, CI-safe testing, and live API tests.
CODECUT.AI • Shared by Khuyen Tran

Primer on Jinja Templating

With Jinja, you can build rich templates that power the front end of your web applications. But you can use Jinja without a web framework running in the background. Anytime you want to create text files with programmatic content, Jinja can help you out.
REAL PYTHON

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