Python Bytes

Topics covered in this episode:

The trusted-publishing debate: how to do it right vs. why you shouldn't trust it

JupyterLab 4.6 and Notebook 7.6 are out!

Tau – new small, readable terminal coding agent

Django Tasks and Django 6.1

Extras

Joke

Watch on YouTube

About the show

Sponsored by us! Support our work through:

Our courses at Talk Python

Consulting from Six Feet Up

Connect with the hosts

Michael: Mastodon / BlueSky / X / LinkedIn

Calvin: Mastodon / BlueSky / X / LinkedIn

Show: Mastodon / BlueSky / X

Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Tuesday at 7am PT. Older video versions available there too.

Finally, if you want an artisanal, hand-crafted digest of every week of the show notes in email form? Add your name and email to our friends of the show list, we'll never share it.

Calvin #1: The trusted-publishing debate: how to do it right vs. why you shouldn't trust it

https://snarky.ca/how-to-publish-to-pypi-using-github-actions-securely/ (Brett Cannon) and https://blog.yossarian.net/2026/07/07/You-shouldnt-trust-trusted-publishing (William Woodruff)

Trusted Publishing (PyPI's OIDC-based auth scheme, also now used by npm, RubyGems, crates.io, NuGet) replaces long-lived API tokens with short-lived, auto-scoped credentials tied to CI/CD machine identity.

Yossarian's post: it's purely an authentication mechanism between a machine identity and a package — it says nothing about package safety or quality. PyPI deliberately avoids any "verified/trusted" badge for it, unlike its verified-URL checkmarks.

Same logic applies to PyPI attestations: anyone can sign with any machine identity they control, so an attestation's presence isn't itself a trust signal.

Bottom line from that post: don't confuse "trusted" (machine-to-machine) with "trustworthy" (human judgment about the package).

Snarky.ca's companion piece is more practical: given GitHub Actions compromises in the news, the real fix is 3 concrete steps — run zizmor to lock down workflow permissions/checkout credentials and pin actions to commit hashes, adopt Trusted Publishing to eliminate stored PyPI tokens, and require manual approval via a GitHub environment before any publish job runs.

Takeaway for listeners: Trusted Publishing is good hygiene for how you authenticate to PyPI, but it's not a substitute for securing your CI pipeline itself — or for actually vetting the packages you install.

Michael #2: JupyterLab 4.6 and Notebook 7.6 are out!

Michał Krassowski's rundown - a chunky minor release: 68 features, 97 bug fixes, 95 contributors, one of the biggest ever.

Scratchpad console (Notebook 7.6 headliner) - a console next to your notebook sharing its kernel, for throwaway experiments. Ctrl+B.

Jump to last-edited cell - new commands hop through recently edited cells.

File browser glow-up - Date Created column, editable breadcrumbs with Tab-completion, and Open in Terminal.

Debugger - sources open in the main area, floating step/continue overlay, live kernel-sources filter.

Custom layouts (Lab) - activity bar top/bottom, draggable panels, four-way tab splits, per-panel Ctrl+scroll zoom.

~5x faster extension builds - webpack → Rspack, and jupyter-builder means no full Lab install needed to build extensions.

Keyboard/a11y - add shortcuts from the UI (no JSON), Find & Replace in Edit menu (Ctrl+H).

Calvin #3: Tau – new small, readable terminal coding agent

Tau – new small, readable terminal coding agent (Python 3.12+), built as both a working tool and a teaching project for how coding agents work under the hood

Install via uv tool install tau-ai, pipx, or pip; ships a tau CLI

Three-layer architecture: tau_ai (provider-neutral model layer) → tau_agent (reusable "brain": messages, tools, events, loop) → tau_coding (CLI/TUI, file & shell tools, sessions)

Supports OpenAI, Anthropic, OpenAI Codex, OpenRouter, Hugging Face, and custom/local OpenAI-compatible endpoints

Built-in tools (read/write/edit/bash), durable JSONL sessions with resume/branching, project instructions via AGENTS.md, and context compaction

Core harness is UI-agnostic — same brain can power the TUI, print mode, or a custom frontend — usable as a standalone library too

Michael #4: Django Tasks and Django 6.1

Django 6.0 finally ships first-party background tasks (django.tasks) - out of Jake Howard's DEP 14, accepted May 2024, after two decades of everyone bolting on Celery/RQ/Huey.

It's an API, not a worker. Django handles task definition, validation, queuing, and result storage - it does not execute them. You bring the backend.

The default backend traps people. ImmediateBackend runs tasks inline on the request thread and blocks until done - so out of the box .enqueue() backgrounds nothing (a 5-second task means a 5-second response). The other built-in, DummyBackend, runs nothing at all. Both are dev/test only.

Nice API otherwise: slap @task on a function, call .enqueue(), get back a TaskResult you look up later by id - with async twins like aenqueue(). Gotcha: args and return values must survive a JSON round-trip, so a tuple sneakily comes back as a list.

The community local backend to know: django-tasks-local by Chris Beaven (SmileyChris). A ThreadPoolExecutor backend that gives real background threads with zero infrastructure - no Redis, no Celery, no database - plus a ProcessPoolBackend for CPU-bound work → github.com/lincolnloop/django-tasks-local

Its catch: results live in memory, so pending tasks vanish on restart or deploy. Great for dev and low-traffic production; for persistence, drop to Jake Howard's django-tasks (DatabaseBackend + worker command).

Extras

Calvin:

Fixing the dictionary with Python 3.14 — Hugo van Kemenade stumbled on - and got fixed - a markup bug in the OED's own citation of a 1706 use of the pi symbol.

Michael:

Bunny DNS is now free

Jokes:

What's the object-oriented way to become wealthy? Inheritance

To understand what recursion is... You must first understand what recursion is

3 SQL statements walk into a NoSQL bar. Soon, they walk out They couldn't find a table.

Topics covered in this episode:

dust - a better du

Hermes Agent: The AI agent that grows with you

llm-coding-agent 0.1a0

Extras

Joke

Watch on YouTube

About the show

Sponsored by us! Support our work through:

Our courses at Talk Python

Consulting from Six Feet Up

Connect with the hosts

Michael: Mastodon / BlueSky / X / LinkedIn

Calvin: Mastodon / BlueSky / X / LinkedIn

Show: Mastodon / BlueSky / X

Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Tuesday at 7am PT. Older video versions available there too.

Finally, if you want an artisanal, hand-crafted digest of every week of the show notes in email form? Add your name and email to our friends of the show list, we'll never share it.

Michael #1: dust - a better du

du + Rust = dust - a fast, visual, intuitive disk-usage CLI

Run dust and immediately see the biggest directories and files without piping through sort, head, or awk

Smart recursive output focuses on what matters instead of dumping every folder

Colored bars show relative size and parent/child hierarchy, making “where did the space go?” obvious

Perfect for Python projects bloated by .venv, caches, Docker volumes, downloaded datasets, and local AI models

Install via brew, cargo install du-dust, conda-forge, Scoop, Snap, deb-get, or GitHub releases

Calvin #2: A Way better ARchive format for Python packaging

war - new archive format spec from Astral (same team as uv/ruff), v0.0.2, still no binary encoding defined yet

Header-Index-Store layout: header IDs the file, index maps names to store offsets, store holds compressed data

Index uses a finite-state transducer (FST) to dedupe common path prefixes across entry names

Supports three entry types (file, directory, link) and three compression modes (store/DEFLATE/zstd), plus an "executable" metadata flag

Unpacking is atomic - writes to a temp dir, then renames into place, so a failed extract never leaves a half-unpacked directory

Strict name-segment rules (no NUL/control chars, no leading/trailing whitespace, blocks Windows-reserved names like CON/PRN) to avoid path traversal and cross-platform footguns

Michael #3: Hermes Agent: The AI agent that grows with you

Hermes Agent is an open-source, Python-built AI agent framework from Nous Research - think ChatGPT-style assistant, but connected to your tools, files, shell, browser, calendar, memory, and messaging apps

I’m using it in Discord as a long-running agent conversation, not just a one-off chatbot session

Hermes can connect through a gateway to platforms like Discord, Telegram, Slack, WhatsApp, email, webhooks, and more - so the same assistant can follow you across surfaces

In my setup, I can send Hermes voice/text from Discord, keep project context across turns as threads, and ask it to actually do things: read GitHub repos, run commands, edit files, schedule calendar events, generate drafts, and verify results

A fun workflow: I can trigger one-shot actions from an Apple Watch shortcut - dictate a request, send it to Hermes, and have the agent execute it asynchronously

Hermes has persistent memory, so it can remember durable preferences and facts - for example, how I like my research formatted

It also has “skills,” which are reusable procedures the agent can load later, so Hermes can self-improve over time instead of rediscovering the same workflow repeatedly

It supports scheduled jobs / cron-style automations, so it can proactively watch for releases, send summaries, run checks, or remind you about things

It’s provider-agnostic: OpenRouter, Anthropic, Google, xAI, local models, Nous Portal, and others

The big idea: Hermes turns an LLM from “a chat box I visit” into “an agent I can reach from anywhere that knows my workflows and can take real actions and learns over time.”

Calvin #4: llm-coding-agent 0.1a0

Simon Willison built a Claude/Codex-style coding agent on top of his llm library, using an alpha of the llm package plus his python-lib-template-repo

Built almost entirely via prompted TDD - asked an agent to write a spec.md, then commit + implement with red/green tests, occasionally hitting a real OpenAI key to sanity-check

Shipped to PyPI as an alpha: uvx --prerelease=allow --with llm-coding-agent llm code

Tool set mirrors familiar coding-agent primitives: read_file, edit_file (exact string replace + diff), write_file, list_files, search_files, execute_command

Also exposes a Python API - CodingAgent(model="gpt-5.5", root=..., approve=True).run(...) - which Simon didn't ask for but got anyway

Demo: llm code --yolo told GPT-5.5 to build a SwiftUI CLI clock; model correctly noted SwiftUI isn't really CLI-friendly and still produced an ASCII-art time display

Extras

Calvin:

Slides, but for developers https://sli.dev/

Wanna reduce your token usage…. only issue is that its lossy https://github.com/teamchong/pxpipe

PEP 772 - Python Packaging Council inaugural election dates set, nominations open July 28, voting September 1-15

Michael:

What the pls? revisited!

Joke: Min requirements for Linux

Topics covered in this episode:

Free-threaded Python: past, present, and future

django-admin-site-search

Qwen 3.6 27B is the sweet spot for local development

A large batch of PEPs are finalized

Extras

Joke

Watch on YouTube

Show Intro

Sponsored by us! Support our work through:

Our courses at Talk Python

Consulting from Six Feet Up

Connect with the hosts

Michael: Mastodon / BlueSky / X / LinkedIn

Calvin: Mastodon / BlueSky / X / LinkedIn

Show: Mastodon / BlueSky / X

Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Tuesday at 7am PT. Older video versions available there too.
Finally, if you want an artisanal, hand-crafted digest of every week of the show notes in email form? Add your name and email to our friends of the show list, we'll never share it.

Calvin #1: Free-threaded Python: past, present, and future

The GIL has prevented true multi-threaded parallelism in CPython since the beginning — multiple past attempts to remove it failed on performance grounds

Sam Gross at Meta finally solved it; his work became PEP 703 and ships as free-threaded CPython today

Python 3.13 was experimental with 20–40% single-threaded slowdown; 3.14 brought that to 0–10%

Python 3.15 (October 2026) delivers a unified ABI — one extension binary works on both GIL and free-threaded builds

Already >50% of the top PyPI binary wheels support free threading

Wouters predicts free-threaded becomes the default between 3.16–3.20 (2027–2031), with the GIL eventually disappearing next decade

Michael #2: django-admin-site-search

via Adam Parkin

A global/site search modal for the Django admin, by Ahmed Aljawahiry. Hit cmd+k anywhere in the admin and you get a command-palette-style search window, kind of like the one in VS Code.

It doesn't just search one model's list page. It searches your entire site in one box:

App labels

Model labels and field attributes

Actual model instances (your data)

Two ways to search the instances:

model_char_fields (the default): runs an __icontains across every CharField (and subclasses) on the model. Zero config, works out of the box.

admin_search_fields: defers to each ModelAdmin's existing get_search_results(), so it respects the search_fields you've already set up.

The part I like: it's permission-aware out of the box. Users only see results for the apps and models they actually have view permission on, so you're not leaking anything through search.

Results appear as you type, with throttling/debouncing so you're not hammering the server on every keystroke, and it's full keyboard nav: cmd+k to open, up/down to move, enter to go.

It's responsive, does dark and light mode, and it pulls Django's built-in admin CSS variables so it just matches whatever admin theme you're running.

Under the hood it's Alpine.js, but bundled into static so there's no external CDN dependency.

Setup is about what you'd expect: pip install django-admin-site-search, add it to INSTALLED_APPS, mix the AdminSiteSearchView into your AdminSite, and drop a few template includes into base_site.html.

Supports Python 3.8 through 3.14 and Django 3.2 through 6.0, MIT licensed, and everything is overridable if you want to skip certain models, add TextField matching, etc.

Calvin #3: Qwen 3.6 27B is the sweet spot for local development

Qwen 3.6 27B is being called the first local model that genuinely competes as a general-purpose intelligence — benchmarks put it at roughly mid-2025 frontier level (comparable to GPT-5 / Claude Sonnet 4.5)

Runs locally via llama.cpp; on an M5 MacBook Max with 8-bit quantization + multi-token prediction, it hits ~32 tokens/sec using ~42GB RAM

4-bit quantization gets it under 18GB, runnable on 32GB devices; Nvidia RTX cards run it even faster

The dense 27B is recommended over the faster MoE 35B A3B — author prefers higher quality output over raw speed

Privacy and reliability are the pitch: fine-tunable, can't be taken down, suitable for sensitive/proprietary data

Author sees this as a stepping stone — frontier open-weight models like GLM 5.2 are now locally runnable with company-grade hardware, and smarter-still local models are coming

Michael #4: A large batch of PEPs are finalized

A bunch of PEPs went from accepted to final.

668, 687, 691, 699, 701, 703, 728, 770, 773, 829

But this wasn’t them making their way into CPython. It’s an admin sorta thing. (Thanks PyCoders)

See the commit.

Extras

Calvin:

More fun bling for your terminal this time - https://charm.land/

Michael:

Follow up from pls, What the pls? Thanks Pito.

Joke: BEMoji

A production-grade utility and component framework built entirely on emoji class names

via Jeff Triplett

Topics covered in this episode:

Backup Docker volumes locally or to any S3

Pyodide 314.0 Release

nb-cli: A Command-Line Interface for AI Agents and Notebook Automation

Hindsight Agent Memory That Learns

Extras

Joke

Watch on YouTube

About the show

Sponsored by us! Support our work through:

Our courses at Talk Python

AWS Community Day Midwest tomorrow Wednesday the 24th in downtown Indianapolis, Six Feet Up is sponsoring and there are 2 Sixies presenting

Connect with the hosts

Michael: Mastodon / BlueSky / X / LinkedIn

Calvin: Mastodon / BlueSky / X / LinkedIn

Show: Mastodon / BlueSky / X

Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Tuesday at 7am PT. Older video versions available there too.

Finally, if you want an bonus digest of every week of the show notes in email form? Add your name and email to our friends of the show list, we'll never share it.

Michael #1: Backup Docker volumes locally or to any S3

Via Bryan Weber (thanks Bryan!), who spotted it over on Virtualization HowTo. Find Bryan at bryanwweber.com.

offen/docker-volume-backup is a lightweight companion container that backs up the volumes your apps actually depend on, then ships them somewhere safe.

It's tiny: written in Go and about 25MB compressed, roughly 1/20th the size of the shell-based image (jareware/docker-volume-backup) that inspired it.

Drop it into your docker compose file as a backup service, mount the volumes you care about as read-only, and you're off.

Push backups to a pile of destinations: a local directory, plus any S3, WebDAV, Azure Blob Storage, Dropbox, Google Drive, or SSH-compatible target. Mix and match as many as you want in one run.

Recurring cron-style backups in a Compose setup, or one-off backups straight from the Docker CLI.

Production-friendly touches worth calling out:

Rotates away old backups so you don't quietly fill the disk.

GPG encryption for your archives.

Notifications on finished and failed runs (so you find out about failures before you need the backup).

Stop a container during backup for a consistent snapshot using a simple docker-volume-backup.stop-during-backup=true label, then auto-restart it.

Run custom commands during the backup lifecycle (great for a database dump before the file copy).

Docker Swarm support, plus arm64 and arm/v7 builds. Hello, Raspberry Pi homelab.

Fun aside from Bryan: he searched our back catalog for this tool and the search came back so fast he thought it hadn't run. Love to hear it.

Calvin #2: Pyodide 314.0 Release

PEP 783 is the real news — Pyodide maintainers used to hand-build 300+ packages. Now anyone can publish Pyodide wheels to PyPI with cibuildwheel.

The version jump from 0.29 to 314.0 is intentional — it now tracks the Python version, so 314.x = Python 3.14. Binary compatibility is locked per Python cycle, meaning packages you build today won't break on the next Pyodide release.

sqlite3, ssl, and lzma are back in the default stdlib — no more await pyodide.loadPackage("sqlite3"). Bigger download, but a much smoother experience for newcomers.

bigint precision bug is fixed — values above 2^53 were silently losing precision when crossing the Python/JS boundary. The new JsBigInt type makes the roundtrip correct. Worth flagging if anyone is doing numeric work in a browser app.

Experimental TCP sockets in Node.js — you can now connect Pyodide to a real database (MySQL, PostgreSQL, Redis tested) when running server-side. Blurs the line between "Python in the browser" and "Python runtime anywhere Wasm runs."

Michael #3: nb-cli: A Command-Line Interface for AI Agents and Notebook Automation

From Piyush Jain (Jupyter and LangChain maintainer) on the Jupyter blog: nb-cli: A Command-Line Interface for AI Agents and Notebook Automation.

nb-cli is an experimental, Rust-based CLI to read, write, execute, and search Jupyter notebooks. The premise: agents are great at CLIs but terrible at hand-editing the nested JSON in an .ipynb, so let them operate on the notebook from the outside instead of running inside it.

Works with or without a Jupyter server. No server? It reads/writes .ipynb files directly and talks to kernels over ZeroMQ. Connected to a live JupyterLab, your edits show up instantly via Y.js (the same CRDT Jupyter uses).

Smart output format: instead of token-heavy JSON or ambiguous plain markdown, it uses @@cell / @@output sentinels with inline metadata. Less wasted context, unambiguous structure, and it degrades gracefully on truncation.

The payoff is composability. "Add a summary section and run it" becomes one shell pipeline instead of six agent tool calls. And nb search notebook.ipynb --with-errors returns only the failing cells, so the agent skips the cells that worked.

Claude Code tie-in: it ships as an agent skill. npx skills install jupyter-ai-contrib/nb-cli and your agent can drive notebooks via nb.

Out of jupyter-ai-contrib, which aims to become an official Jupyter AI subproject. Still early (crates.io is at v0.0.5), so kick the tires before anything load-bearing.

See also marimo-pair.

Calvin #4: Hindsight Agent Memory That Learns

AI agents forget everything between sessions — Hindsight gives them persistent memory that learns over time

Simple three-method API: retain(), recall(), reflect() — store, retrieve, and reason over memories

TEMPR retrieval runs semantic, keyword, graph, and temporal search in parallel for accurate results

Automatically consolidates related facts into durable observations instead of piling up duplicates

pip install hindsight-all runs the entire server in-process; integrates with LangChain, LlamaIndex, Pydantic AI, CrewAI, and more

Extras

Calvin:

Clanker: A Word For The Machine

**Ponytail — You know him. Long ponytail. Oval glasses. Has been at the company longer than the version control**

**Klangk: Multi-User AI Sandboxing, Collaboration and Coding Platform**

Cursor announces Origin

performative-ui to quick start your new idea
Michael:

Astral Joins OpenAI: The Interview

SpaceX to acquire Cursor

And OpenAI renews Open Source support

Portuguese subtitles are now available for Talk Python courses

DSF is hiring including Six Feet Up support

Joke: Oh Babe…

Topics covered in this episode:

pi + superpowers

Terminal: Warp.dev + OhMyZSH

{Blink,kitty} + mosh + tmux

Claude code

MacWhisper or Handy

Tailscale

Extras

Joke

Watch on YouTube

About the show

Sponsored by us! Support our work through:

Our courses at Talk Python Training

Six Feet Up is hosting a LinkedIn Live
Connect with the hosts

Michael: @mkennedy@fosstodon.org / @mkennedy.codes (bsky)

Calvin: @calvinhp@sixfeetup.social / @calvinhp.com (bsky)

Show: @pythonbytes@fosstodon.org / @pythonbytes.fm (bsky)

Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Tuesday at 7am PT. Older video versions available there too.
Finally, if you want an artisanal, hand-crafted digest of every week of the show notes in email form? Add your name and email to our friends of the show list, we'll never share it.

Calvin #1: pi + superpowers

terminal-first, open-source coding agent

Session management is a first-class citizen

Extension model is what makes pi special — it's aggressively composable

Superpowers brings a structured software development methodology as loadable skills

Steps back and asks you what you're really trying to do

“hand you the keys to the car” mode vs guardrails might not be for everyone

Michael #2: Terminal: Warp.dev + OhMyZSH

If you’re using the base terminal with default settings, you have so much head-room for improvement.

I’ve been using Warp.dev since Elvis talked me into it. ;)

Remarkable terminal but the AI side of things is a bit junky, can be turned off

OhMyZSH gives better autocomplete

e.g. git branch [HTML_REMOVED] lists all branches in the local repo!

Commandbookapp.com is excellent to keep the terminal focused on terminal things and more server commands and other automation in Command Book.

Calvin #3: {Blink,kitty} + mosh + tmux

Kitty Terminal — GPU-accelerated terminal emulator for macOS, Linux, and Windows with support for graphics, ligatures, and a powerful tiling layout system built right in.

Blink Shell — The go-to terminal for iPad/iPhone power users; full SSH and Mosh client with a gorgeous interface built specifically for mobile professional workflows.

Mosh — Mobile Shell replaces SSH for remote connections, surviving network switches, sleep cycles, and flaky Wi-Fi with zero dropped sessions — essential for staying connected to long-running agentic jobs.

tmux — Terminal multiplexer that keeps sessions alive on your Linux server indefinitely; detach from a Mosh session on your Mac, reconnect from your iPad, and your agent is right where you left it.

The combo — Kitty or Blink + Mosh + tmux creates a "persistent remote brain" pattern: your beefy Linux homelab runs the compute-heavy agent sessions 24/7, and any device becomes a thin client to drop in and out at will.

Michael #4: Claude code

I prefer the IDE experience, the new PyCharm + Claude integration is really good. VS Code too. Why IDE? Because we should still be present with our code and managing context is much easier.

Use the best/latest models on high thinking. “Speed” is not your friend, it’s just shortcuts.

Create skills and agents and use them.

Curate your own rules (e.g. Talk Python’s Claude.md)

Works well on non-coding things. Just create a folder, put a ton of files in there and it’s like NotebookLM + Chat + more.

Calvin #5: MacWhisper or Handy

Transcribes your speech using your choice of Whisper or Parakeet models.

All transcription is done on your device, no data leaves your machine.

Automatic Speaker Recognition with local models.

Handy is more basic, but open source and runs on all platforms.

Michael #6: Tailscale

No need to open ports at all, Tailscale makes machines inside the same network accessible to each other

Works great for laptops, desktops, etc. But also available for servers.

Though I still use cloud firewalls for servers.

How I use it:

My dev database server, preloaded with QA data, is always running on my home mac mini m4 pro. All my apps look for that server before looking locally and tailscale makes them always accessible to each other

My local LLMs expose OpenAI API compatible APIs. Tailscale makes these accessible even while traveling or at a coffee shop.

Use my mini as an exit node. All traffic is routed outbound from my local fiber network. Great to restricted IPs like accessing my servers without caring about the local IP.

Screen share back to my home machines even while traveling.

Listen to the Talk Python episode with Alex for a deeper conversation.

Extras

Calvin:

Telescopo great Mac Markdown viewer/editor.
Michael:

One more: Typora markdown editor.

Created formal documentation for many of my open source packages using Great Docs.

Via Mark Little: Statement on the US government directive to suspend access to Fable 5 and Mythos 5

Joke: No second date