Python Bytes

By Michael Kennedy and Brian Okken

Python Bytes is a weekly podcast hosted by Michael Kennedy and Brian Okken. The show is a short discussion on the headlines and noteworthy news in the Python, developer, and data science space.... more

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The podcast currently has 637 episodes available.

Python Bytes episodes:

May 19, 2025#432 How To Fix Your Computer
Topics covered in this episode:
pre-commit: install with uv
PEP 773: A Python Installation Manager for Windows (Accepted)
Changes for Textual
The Best Programmers I Know
Extras
Joke
Watch on YouTube
About the show
Sponsored by NordLayer: pythonbytes.fm/nordlayer
Connect with the hosts
Michael: @[email protected] / @mkennedy.codes (bsky)
Brian: @[email protected] / @brianokken.bsky.social
Show: @[email protected] / @pythonbytes.fm (bsky)
Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am 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.
Brian #1: pre-commit: install with uv
Adam Johnson
uv tool works great at keeping tools you use on lots of projects up to date quickly, why not use it for pre-commit.
The extension of pre-commit-uv will use uv to create virtual environments and install packages fore pre-commit. This speeds up initial pre-commit cache creation.
However, Adam is recommending this flavor of using pre-commit because it’s just plain easier to install pre-commit and dependencies than the official pre-commit install guide.
Win-win.
Side note: No Adam, I’m not going to pronounce uv “uhv”, I’ll stick with “you vee”, even Astral tells me I’m wrong
Michael #2: PEP 773: A Python Installation Manager for Windows (Accepted)
via pycoders newsletter
One manager to rule them all – PyManager.
PEP 773 replaces all existing Windows installers (.exe “traditional” bundle, per-version Windows Store apps, and the separate py.exe launcher) with a single MSIX app called Python Install Manager (nick-named PyManager).
PyManager should be mainstream by CPython 3.15, and the traditional installer disappears no earlier than 3.16 (≈ mid-2027).
Simple, predictable commands.
python → launches “the best” runtime already present or auto-installs the latest CPython if none is found.
py → same launcher as today plus management sub-commands:
py install, py uninstall, py list, py exec, py help.
Optional python3 and python3.x aliases can be enabled by adding one extra PATH entry.
Michael #3: Changes for Textual
Bittersweet news: the business experiment ends, but the code lives on.
Textual began as a hobby project layered on top of Rich, but it has grown into a mature, “makes-the-terminal-do-the-impossible” TUI framework with an active community and standout documentation.
Despite Textual’s technical success, the team couldn’t pinpoint a single pain-point big enough to sustain a business model, so the company will wind down in the coming weeks.
The projects themselves aren’t going anywhere: they’re stable, battle-tested, and will continue under the stewardship of the original author and the broader community.
Brian #4: The Best Programmers I Know
Matthias Endler
“I have met a lot of developers in my life. Lately, I asked myself: “What does it take to be one of the best? What do they all have in common?””
The list
Read the reference
Know your tools really well
Read the error message
Break down problems
Don’t be afraid to get your hands dirty
Always help others
Write
Never stop learning
Status doesn’t matter
Build a reputation
Have patience
Never blame the computer
Don’t be afraid to say “I don’t know”
Don’t guess
Keep it simple
Each topic has a short discussion. So don’t just ready the bullet points, check out the article.
Extras
Brian:
I had a great time in Munich last week. I a talk at a company event, met with tons of people, and had a great time.
The best part was connecting with people from different divisions working on similar problems.
I love the idea of internal conferences to get people to self organize by topic and meet people they wouldn’t otherwise, to share ideas.
Also got started working on a second book on the plane trip back.
Michael:
Talk Python Clips (e.g. mullet)
Embrace your cloud firewall (example).
Python 3.14.0 beta 1 is here
Congrats to the new PSF Fellows.
Cancelled faster CPython
bsky.app/profile/snarky.ca post
Joke: How To Fix Your Computer
...more
26min
May 05, 2025#431 Nerd Gas
Topics covered in this episode:
pirel: Python release cycle in your terminal
FastAPI Cloud
Python's new t-strings
Extras
Joke
Watch on YouTube
About the show
Sponsored by NordLayer: pythonbytes.fm/nordlayer
Connect with the hosts
Michael: @[email protected] / @mkennedy.codes (bsky)
Brian: @[email protected] / @brianokken.bsky.social
Show: @[email protected] / @pythonbytes.fm (bsky)
Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am 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: pirel: Python release cycle in your terminal
pirel check shows release information about your active Python interpreter.
If the active version is end-of-life, the program exits with code 1. If no active Python interpreter is found, the program exits with code 2.
pirel list lists all Python releases in a table. Your active Python interpreter is highlighted.
A picture is worth many words
Brian #2: FastAPI Cloud
Sebastián Ramírez, creator of FastAPI, announced today the formation of a new Company, FastAPI Cloud.
Here’s the announcement blog post: FastAPI Cloud - By The Same Team Behind FastAPI
There’s a wait list to try it out.
Promises to turns deployment into fastapi login; fastapi deploy
Side note: announcement includes quote from Daft Punk: Build Harder, Better, Faster, Stronger
I just included this in a talk I’m gave last week (and will again next week), where I modify this to “Build Easier, Better, Faster, Stronger”
Sebastian and I are both fans of the rocket emoji.
BTW, we first covered FastAPI on episode 123 in 2019
Brian #3: Python's new t-strings
Dave Peck, one of the authors of PEP 750, which will go into Python 3.14
We covered t-strings in ep 428
In article
t-strings security benefits over f-strings
How to work with t-strings
A Pig Latin example
Also, I think I have always done this wrong
Is it the first consonant to the end? or the first consonant cluster?
So… Brian → Rianbay? or Ianbray?
BTW, this is an example of nerdgassing
What’s next once t-strings ship?
On thing that’s next (in Python 3.15, maybe, is using t-strings in shlex and subprocess)
PEP 787 – Safer subprocess usage using t-strings deferred to 3.15
Michael #4: zev
A simple CLI tool to help you remember terminal commands.
Examples:
# Find running processes
zev 'show all running python processes'
# File operations
zev 'find all .py files modified in the last 24 hours'
# System information
zev 'show disk usage for current directory'
# Network commands
zev 'check if google.com is reachable'
# Git operations
zev 'show uncommitted changes in git'
Again, picture worth many words:
Extras
Brian:
Holy Grail turns 50
nerdgassing
Michael:
Transcripts are a bit better now.
Zen is better now
Joke: Can my friend come in?
...more
30min
April 28, 2025#430 Or you go to jail
Topics covered in this episode:
pip 25.1 has dependency groups, pylock.toml, plus more
aiohttp goes free threaded
uv 0.6.15 supports pylock.toml
Whenever
Extras
Joke
Watch on YouTube
About the show
Sponsored by Porkbun! Use our link pythonbytes.fm/porkbun and get a .app or .dev domain for $5.99 at Porkbun.
Connect with the hosts
Michael: @[email protected] / @mkennedy.codes (bsky)
Brian: @[email protected] / @brianokken.bsky.social
Show: @[email protected] / @pythonbytes.fm (bsky)
Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am 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.
Brian #1: pip 25.1 has dependency groups, pylock.toml, plus more
post What's new in pip 25.1 - Dependency groups!
Richard Si
Discovered this through Hugo van Kemenade
Dependency groups, PEP 735, supported
# pyproject.toml
[dependency-groups]
test = ["pytest", "pytest-xdist"]
lint = ["mypy", "isort"]
# Dependency Groups can include other groups! ✨
dev = [ {include-group = "test"}, {include-group = "lint"} ]
Package installation progress bar
Resumable downloads
Experimental lockfile generation, PEP 751, with pip lock
so cool
pip index versions is stable, no longer experimental
use this to get a list of available versions
ex: python3 -m pip index versions pytest-check
combine with --json to get a nice script readable output
Michael #2: aiohttp goes free threaded
Thanks to months of consistent contributions by Lysandros Nikolaou, all of the mandatory dependencies of #aiohttp now ship free-threaded variants of #wheels!
This unlocks the same in aiohttp!
Brian #3: uv 0.6.15 supports pylock.toml
Discovered through Brett Cannon
So far, these projects support pylock.toml
pip
pip-audit
pdm
uv
With uv
To export a uv.lock to the pylock.toml format,
run: uv export -o pylock.toml
To generate a pylock.toml file from a set of requirements,
run: uv pip compile -o pylock.toml -r requirements.in
To install from a pylock.toml file,
run: uv pip sync pylock.toml or uv pip install -r pylock.toml
Michael #4: Whenever
via Pat Decker
Typed and DST-safe datetimes for Python, available in Rust or pure Python.
Whenever helps you write correct and type checked datetime code.
It's also way faster than other third-party libraries—and usually the standard library as well.
Extras
Brian:
Every UUID
Michael:
New Vulnerability in GitHub Copilot and Cursor: How Hackers Can Weaponize Code Agents via Brian Skinn
And typosquatting in the AI age
Firefox Send alternatives
file.pizza via @rafaelwo
bitwarden send
Joke: Can you Vibe?
Interview with Vibe Coder in 2025
Senior Engineer tries Vibe Coding
...more
30min
April 21, 2025#429 Nitpicking Python
Topics covered in this episode:
Huly
CVE Foundation formed to take over CVE program from MITRE
drawdb
14 Advanced Python Features
Extras
Joke
Watch on YouTube
About the show
Sponsored by Posit Workbench: pythonbytes.fm/workbench
Connect with the hosts
Michael: @[email protected] / @mkennedy.codes (bsky)
Brian: @[email protected] / @brianokken.bsky.social
Show: @[email protected] / @pythonbytes.fm (bsky)
Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am 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: Huly
All-in-One Project Management Platform (alternative to Linear, Jira, Slack, Notion, Motion)
If you're primarily interested in self-hosting Huly without the intention to modify or contribute to its development, please use huly-selfhost.
Manage your tasks efficiently with Huly's bidirectional GitHub synchronization. Use Huly as an advanced front-end for GitHub Issues and GitHub Projects.
Connect every element of your workflow to build a dynamic knowledge base.
Everything you need for productive team work: Team Planner • Project Management • Virtual Office • Chat • Documents • Inbox
Self hosting as a service: elest.io
Brian #2: CVE Foundation formed to take over CVE program from MITRE
Back story: CVE, global source of cybersecurity info, was hours from being cut by DHS
The 25-year-old CVE program, an essential part of global cybersecurity, is cited in nearly any discussion or response to a computer security issue.
CVE was at real risk of closure after its contract was set to expire on April 16.
The nonprofit MITRE runs CVE on a contract with the DHS.
A letter last Tuesday sent Tuesday by Yosry Barsoum, vice president of MITRE, gave notice of the potential halt to operations.
Another possible victim of the current administration.
CVE Foundation Launched to Secure the Future of the CVE Program
CVE Board members have spent the past year developing a strategy to transition CVE to a dedicated, non-profit foundation. The new CVE Foundation will focus solely on continuing the mission of delivering high-quality vulnerability identification and maintaining the integrity and availability of CVE data for defenders worldwide.
Over the coming days, the Foundation will release more information about its structure, transition planning, and opportunities for involvement from the broader community.
Michael #3: drawdb
Free and open source, simple, and intuitive database design editor, data-modeler, and SQL generator.
Great drag-drop relationship manager
Define your DB visually, export as SQL create scripts
Or import existing SQL to kickstart the diagramming.
Brian #4: 14 Advanced Python Features
Edward Li
Picking some favorites
1. Typing Overloads
2. Keyword-only and Positional-only Arguments
9. Python Nitpicks
For-else statements
Walrus operator
Short Circuit Evaluation
Operator Chaining
Extras
Michael:
Thunderbird send / other firefox things.
Joke: Python Tariffs
Thanks wagenrace
Thanks Campfire Tales
...more
28min
April 14, 2025#428 How old is your Python?
Topics covered in this episode:
How to Write a Git Commit Message
Caddy Web Server
Some new PEPs approved
juv
Extras
Joke
Watch on YouTube
About the show
Sponsored by Posit Connect: pythonbytes.fm/connect
Connect with the hosts
Michael: @[email protected] / @mkennedy.codes (bsky)
Brian: @[email protected] / @brianokken.bsky.social
Show: @[email protected] / @pythonbytes.fm (bsky)
Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am 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.
Brian #1: How to Write a Git Commit Message
Chris Beams
7 rules of a great commit message
Separate subject from body with a blank line
Limit the subject line to 50 characters
Capitalize the subject line
Do not end the subject line with a period
Use the imperative mood in the subject line
Wrap the body at 72 characters
Use the body to explain what and why vs. how
Article also includes
Why a good commit message matters
Discussion about each of the 7 rules
Cool hat tips to other articles on the subject
“Keep in mind: This has all been said before.”
Each word is a different link.
Michael #2: Caddy Web Server
via Fredrik Mellström
Like a more modern NGINX
Caddy automatically obtains and renews TLS certificates for all your sites.
Caddy's native configuration is a JSON document.
Even localhost and internal IPs are served with TLS using the intermediate of a fully-automated, self-managed CA that is automatically installed into most local trust stores.
Configure multiple Caddy instances with the same storage, and they will automatically coordinate certificate management as a fleet.
Production-grade static file server.
Brian #3: Some new PEPs approved
PEP 770 – Improving measurability of Python packages with Software Bill-of-Materials
Accepted for packaging
Author: Seth Larson, Sponsor Brett Cannon
“This PEP proposes using SBOM documents included in Python packages as a means to improve automated software measurability for Python packages.”
PEP 750 – Template Strings
Accepted for Python 3.14
Author: Jim Baker, Guido van Rossum, Paul Everitt, Kaudai Aono, Lysandros Nikolaou, Dave Peck
“Templates provide developers with access to the string and its interpolated values before they are combined. This brings native flexible string processing to the Python language and enables safety checks, web templating, domain-specific languages, and more.”
Michael #4: juv
A toolkit for reproducible Jupyter notebooks, powered by uv.
Create, manage, and run Jupyter notebooks with their dependencies
Pin dependencies with PEP 723 - inline script metadata
Launch ephemeral sessions for multiple front ends (e.g., JupyterLab, Notebook, NbClassic)
Powered by uv for fast dependency management
Use uvx to run jupyterlab with ephemeral virtual environments and tracked dependencies.
Extras
Brian:
Status of Python versions
new-ish format
Use this all the time. Can’t remember if we’ve covered the new format yet.
See also Python endoflife.date
Same dates, very visible encouragement to move on to Python 3.13 if you haven’t already.
Michael:
Python 3.13.3 is out.
.git-blame-ignore-revs follow up
Joke: BGPT (thanks Doug Farrell)
...more
31min
April 07, 2025#427 Rise of the Python Lord
Topics covered in this episode:
Git Town solves the problem that using the Git CLI correctly
PEP 751 – A file format to record Python dependencies for installation reproducibility
git-who and watchgha
Share Python Scripts Like a Pro: uv and PEP 723 for Easy Deployment
Extras
Joke
Watch on YouTube
About the show
Sponsored by Posit Package Manager: pythonbytes.fm/ppm
Connect with the hosts
Michael: @[email protected] / @mkennedy.codes (bsky)
Brian: @[email protected] / @brianokken.bsky.social
Show: @[email protected] / @pythonbytes.fm (bsky)
Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am 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: Git Town solves the problem that using the Git CLI correctly
Git Town is a reusable implementation of Git workflows for common usage scenarios like contributing to a centralized code repository on platforms like GitHub, GitLab, or Gitea.
Think of Git Town as your Bash scripts for Git, but fully engineered with rock-solid support for many use cases, edge cases, and error conditions.
Keep using Git the way you do now, but with extra commands to create various branch types, keep them in sync, compress, review, and ship them efficiently.
Basic workflow
Commands to create, work on, and ship features.
git town hack - create a new feature branch
git town sync - update the current branch with all ongoing changes
git town switch - switch between branches visually
git town propose - propose to ship a branch
git town ship - deliver a completed feature branch
Additional workflow commands
Commands to deal with edge cases.
git town delete - delete a feature branch
git town rename - rename a branch
git town repo - view the Git repository in the browser
Brian #2: PEP 751 – A file format to record Python dependencies for installation reproducibility
Accepted
From Brett Cannon
“PEP 751 has been accepted!
This means Python now has a lock file standard that can act as an export target for tools that can create some sort of lock file. And for some tools the format can act as their primary lock file format as well instead of some proprietary format.”
File name: pylock.toml or at least something that starts with pylock and ends with .toml
It’s exciting to see the start of a standardized lock file
Michael #3: git-who and watchgha
git-who is a command-line tool for answering that eternal question: Who wrote this code?!
Unlike git blame, which can tell you who wrote a line of code, git-who tells you the people responsible for entire components or subsystems in a codebase.
You can think of git-who sort of like git blame but for file trees rather than individual files.
And watchgha - Live display of current GitHub action runs by Ned Batchelder
Brian #4: Share Python Scripts Like a Pro: uv and PEP 723 for Easy Deployment
Dave Johnson
Nice full tutorial discussing single file Python scripts using uv with external dependencies
Starting with a script with dependencies.
Using uv add --script [HTML_REMOVED] [HTML_REMOVED] to add a /// script block to the top
Using uv run
Adding #!/usr/bin/env -S uv run --script shebang
Even some Windows advice
Extras
Brian:
April 1 pranks done well
BREAKING: Guido van Rossum Returns as Python’s BDFL
including
Brett Cannon noted as “Famous Python Quotationist”
Guido taking credit for “I came for the language but I stayed for the community”
which was from Brett
then Brett’s title of “Famous Python Quotationist” is crossed out.
Barry Warsaw asking Guido about releasing Python 2.8
Barry is the FLUFL, “Friendly Language Uncle For Life “
Mariatta can’t get Guido to respond in chat until she addresses him as “my lord”.
“… becoming one with whitespace.”
“Indentation is Enlightenment”
Upcoming new keyword: maybe
Like “if” but more Pythonic
as in Maybe: print("Python The Documentary - Coming This Summer!")
I’m really hoping there is a documentary
April 1 pranks done poorly
Note: pytest-repeat works fine with Python 3.14, and never had any problems
If you have to explain the joke, maybe it’s not funny.
The explanation
pi, an irrational number, as in it cannot be expressed by a ratio of two integers, starts with 3.14159 and then keeps going, and never repeats.
Python 3.14 is in alpha and people could be testing with it for packages
Test & Code is doing a series on pytest plugins
pytest-repeat is a pytest plugin, and it happened to not have any tests for 3.14 yet.
Now the “joke”.
I pretended that I had tried pytest-repeat with Python 3.14 and it didn’t work.
Test & Code: Python 3.14 won't repeat with pytest-repeat
Thus, Python 3.14 won’t repeat.
Also I mentioned that there was no “rational” explanation.
And pi is an irrational number.
Michael:
pysqlscribe v0.5.0 has the “parse create scripts” feature I suggested!
Markdown follow up
Prettier to format Markdown via Hugo
Been using mdformat on some upcoming projects including the almost done Talk Python in Production book. Command I like is mdformat --number --wrap no ./
uv tool install --with is indeed the pipx inject equivalent, but requires multiple --with's:
pipx inject mdformat mdformat-gfm mdformat-frontmatter mdformat-footnote mdformat-gfm-alerts
uv tool install mdformat --with mdformat-gfm --with mdformat-frontmatter --with mdformat-footnote --with mdformat-gfm-alerts
uv follow up
From James Falcon
As a fellow uv enthusiast, I was still holding out for a use case that uv hasn't solved. However, after last week's episode, you guys finally convinced me to switch over fully, so I figured I'd explain the use case and how I'm working around uv's limitations.
I maintain a python library supported across multiple python versions and occasionally need to deal with bugs specific to a python version. Because of that, I have multiple virtualenvs for one project. E.g., mylib38 (for python 3.8), mylib313 (for python 3.13), etc. I don't want a bunch of .venv directories littering my project dir.
For this, pyenv was fantastic. You could create the venv with pyenv virtualenv 3.13.2 mylib313, then either activate the venv with pyenv activate mylib313 and create a .python-version file containing mylib313 so I never had to manually activate the env I want to use by default on that project.
uv doesn't have a great solution for this use case, but I switched to a workflow that works well enough for me:
Define my own central location for venvs. For me that's ~/v
Create venvs with something like uv venv --python 3.13 ~/v/mylib313
Add a simple function to my bashrc:
`workon() { source ~/v/$1/bin/activate } \ so now I can run \workon mylib313orworkon mylib38when I need to work in a specific environment. uv's.python-version` support works much differently than pyenv's, and that lack of support is my biggest frustration with this approach, but I am willing to live without it.
Do you Firefox but not Zen? You can now make pure Firefox more like Zen’s / Arc’s layout.
Joke: So here it will stay
See the follow up thread too!
Also: Guido as Lord Python via Nick Muoh
...more
37min
March 31, 2025#426 Committing to Formatted Markdown
Topics covered in this episode:
mdformat
pre-commit-uv
PEP 758 and 781
Serie: rich git commit graph in your terminal, like magic
Extras
Joke
Watch on YouTube
About the show
Sponsored by Posit Connect Cloud: pythonbytes.fm/connect-cloud
Connect with the hosts
Michael: @[email protected] / @mkennedy.codes (bsky)
Brian: @[email protected] / @brianokken.bsky.social
Show: @[email protected] / @pythonbytes.fm (bsky)
Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am 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.
Brian #1: mdformat
Suggested by Matthias Schöttle
Last episode Michael covered blacken-docs, and I mentioned it’d be nice to have an autoformatter for text markdown.
Matthias delivered with suggesting mdformat
“Mdformat is an opinionated Markdown formatter that can be used to enforce a consistent style in Markdown files.”
A python project that can be run on the command line.
Uses a style guide I mostly agree with.
I’m not a huge fan of numbered list items all being “1.”, but that can be turned off with --number, so I’m happy.
Converts underlined headings to #, ##, etc. headings.
Lots of other sane conventions.
The numbering thing is also sane, I just think it also makes the raw markdown hard to read.
Has a plugin system to format code blocks
Michael #2: pre-commit-uv
via Ben Falk
Use uv to create virtual environments and install packages for pre-commit.
Brian #3: PEP 758 and 781
PEP 758 – Allow except and except* expressions without parentheses
accepted
PEP 781 – Make TYPE_CHECKING a built-in constant
draft status
Also, PEP Index by Category kinda rocks
Michael #4: Serie: rich git commit graph in your terminal, like magic
While some users prefer to use Git via CLI, they often rely on a GUI or feature-rich TUI to view commit logs.
Others may find git log --graph sufficient.
Goals
Provide a rich git log --graph experience in the terminal.
Offer commit graph-centric browsing of Git repositories.
Extras
Michael:
Sunsetting Search? (Startpage)
Ruff in or out?
Joke: Wishing for wishes
...more
30min
March 24, 2025#425 If You Were a Klingon Programmer
Topics covered in this episode:
Why aren't you using uv?
Python Developer Tooling Handbook
Calling all doc writers: blacken-docs
Reinventing notebooks as reusable Python programs
Extras
Joke
Watch on YouTube
About the show
Brought to you by Posit Connect: pythonbytes.fm/connect.
Connect with the hosts
Michael: @[email protected] / @mkennedy.codes (bsky)
Brian: @[email protected] / @brianokken.bsky.social
Show: @[email protected] / @pythonbytes.fm (bsky)
Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am 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: Why aren't you using uv?
Fun conversation on X by Armin Ronacher.
Interesting quotes from the thread
I get it replaces pip/pyenv, but should I also use it instead of the built in 'python -m venv .venv'?
But I need python installed to make python programs?
Because it places the venv in the project folder and I can't run executables from there due to corporate policy. Many such cases. No idea why astral doesn't address this with more urgency.
Sounds like a bad corporate policy :)
i’m too lazy to switch from pyenv and pip
trust issues, what if they do a bait and switch …
Because everyone said that about poetry and I'm not sure I'm really ready to get hurt again.
Masochism
Many times I tried a lot of similar tools and always come back to pip and pip-tools. Them are just work, why should I spend my time for something "cool" that will bring more problems?
I tried this week but I was expecting a "uv install requests" instead of "uv add". Switched back to pipenv.
we partially use it. will transition when Dependabot support is available.
I’ll leave it with → Jared Scheel: Seeing a whole lotta Stockholm Syndrome in the replies to this question.
Brian #2: Python Developer Tooling Handbook
Tim Hopper
“This is not a book about programming Python. Instead, the goal of this book is to help you understand the ecosystem of tools used to make Python development easier and more productive”
Covers tools related to packaging, linting, formatting, and managing dependencies.
Michael #3: Calling all doc writers: blacken-docs
Run black on python code blocks in documentation files
You can also install blacken-docs as a pre-commit hook.
It supports Markdown, reStructuredText, and LaTex files.
Additionally, you can run it on Python files to reformat Markdown and reStructuredText within docstrings.
Brian #4: Reinventing notebooks as reusable Python programs
marimo allows you to store notebooks as plaintext Python files
properties
Git-friendly: small code change => small diff
easy for both humans and computers to read
importable as a Python module, without executing notebook cells
executable as a Python script
editable with a text editor
Also, … testing with pytest
“Because marimo notebooks are just Python files, they are interoperable with other tools for Python — including pytest. “
“Testing cells. Any cell named as test_* is automatically discoverable and testable by pytest. The same goes for any cell that contains only test_ functions and Test classes.”
“Importantly, because cells are wrapped in functions, running pytest test_notebook.py doesn’t execute the entire notebook — just its tests.”
Extras
Brian:
PyConUS announces Refund Policy for International Attendees
New format now live for The Complete pytest Course Bundle and component courses
Each course now available separately also
pytest Primary Power is 13 lessons, 3.9 hours
Using pytest with Projects, 10 lessons, 3.4 hours
pytest Booster Rockets, 6 lessons, 1.3 hours of content
New format is easier to navigate
Better for people who like different speeds. I’m usually a 1.25x-1.5x speed person.
Now also with Congratulations! lessons (with fireworks) and printable certificates.
Michael:
PyCon Taiwan is currently calling for proposals
HN trends follow up via Shinjitsu
I'm sure some other Hacker News reader has already given you the feedback, but in the unlikely case that they haven't, You read those headlines in this segment exactly wrong.
“Ask HN: Who is hiring?" is a monthly post that asks employers to post
about jobs they have available
“Ask HN: Who wants to be hired?” is a monthly topic where they ask
people who are looking for jobs to post about themselves in the hope
that their skillset it is a good match (and not an LLM generated resume)
So unfortunately your rosy analysis might need a less rosy
interpretation.
Joke:
Top 12 things likely to be overheard if you had a Klingon Programmer
From Holgi on Mastodon
...more
38min
March 17, 2025#424 We Will Test in Production
Topics covered in this episode:
The weird quirk with rounding in Python
Python interpreter adds tail calls
Remove punctuation from a string with translate and maketrans
Extra, extra, extra
Extras
Joke
Watch on YouTube
About the show
Sponsored by us! Support our work through:
Our courses at Talk Python Training
The Complete pytest Course
Patreon Supporters
Connect with the hosts
Michael: @[email protected] / @mkennedy.codes (bsky)
Brian: @[email protected] / @brianokken.bsky.social
Show: @[email protected] / @pythonbytes.fm (bsky)
Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am 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.
Brian #1: The weird quirk with rounding in Python
Tom Nijhof-Verheesb
With numbers ending in .5, Python always rounds to an even number.
round(0.5) → 0
round(1.5) → 2
etc
This follows IEEE 754
You can use decimal if you need a different behavior.
Michael #2: Python interpreter adds tail calls
Ken Jin, a member of the project, has merged a new set of changes that have been benchmarked as improving performance by 10% for some architectures.
"Speedup is roughly equal to 2 minor CPython releases worth of improvements. For example, CPython 3.12 roughly sped up by 5%.”
Brian #3: Remove punctuation from a string with translate and maketrans
Rodrigo
“Don't use the method replace to remove punctuation from a Python string. Instead, use the method translate.”
Michael #4: Extra, extra, extra
Animation v Coding, hello world to transformers
TypeScript rewritten in Go
Firefox lies
PyCon’s Startup Row
Python in Production Book
Extras
Joke: Startrek Testing
...more
28min
March 10, 2025#423 Traveling the Python Universe
Topics covered in this episode:
pysqlscribe
A map of Python
Rust, C++, and Python trends in jobs on Hacker News (February 2025)
The features of Python's help() function
Extras
Joke
Watch on YouTube
About the show
Sponsored by us! Support our work through:
Our courses at Talk Python Training
The Complete pytest Course
Patreon Supporters
Connect with the hosts
Michael: @[email protected] / @mkennedy.codes (bsky)
Brian: @[email protected] / @brianokken.bsky.social
Show: @[email protected] / @pythonbytes.fm (bsky)
Join us on YouTube at pythonbytes.fm/live to be part of the audience. Usually Monday at 10am 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: pysqlscribe
A Python library intended to make building SQL queries in your code a bit easier.
A Query object can be constructed using the QueryRegistry's get_builder featuring a dialect (e.g; "mysql", "postgres", "oracle").
Brian #2: A map of Python
Cool visualization of dependencies in PyPI packages
Even cooler visualization (linked from main article)
Michael #3: Rust, C++, and Python trends in jobs on Hacker News (February 2025)
Interesting supply and demand comparisons from at least on source.
Brian #4: The features of Python's help() function
Trey Hunner
Don’t forget how useful and cool help() is.
Extras
Michael:
Granian works with FastAPI again
Joke: Computer engineer vs. Geologist
...more
27min

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