Wooo, unanimous acceptance of 810! Python is getting lazy imports! So excited about this! discuss.python.org/t/pep-810-ex...

Python 3.9 is officially EOL! Congratulations to @lukasz.langa.pl on a wonderful run as release manager! 🖤 discuss.python.org/t/the-final-...

Carlton's proposal to move Django to an annual release cycle makes all the sense. The x.2 LTS releases always felt wrong to me since it has always been much easier and safer to upgrade each version rather than doing the LTS to LTS leap in one go. buttondown.com/carlton/arc...

Useful article by @anze3db.pecar.me. Be cautious with your memory usage. blog.pecar.me/django-bulk-... #django #python

Hearts at the PSF are full today from the responses about the recent grant turn down news we shared. All of your kind words of support & solidarity, as well as your donations & new memberships, mean the world to us. We're so grateful to be in community with each of you 💛🐍💙

TLDR; The PSF has made the decision to put our community and our shared diversity, equity, and inclusion values ahead of seeking $1.5M in new revenue. Please read and share. pyfound.blogspot.com/2025/10/NSF-... 🧵

us-east-1 is down, happy Monday!

I had a memory issue with Django's bulk_update queryset method. The TLDR version is that bulk_update prepares all the update statements in advance (even when batch_size is set) which can use more memory than expected. Details and a solution in the blog: blog.pecar.me/django-bulk...

In case you prefer text over video, the blog post version of my #EuroPython keynote about why it took 4 years to get a lock files specification for #Python is now up at snarky.ca/why-it-took-... .

I've improved the performance of the starter packs list query from about 200ms to 2ms. 🎉 The trick was to stop dynamically computing the number of accounts in a starter pack and instead precompute it in a column. A bit more work on each update, but worth it!

Yesterday, Python 3.14 was released, and today all of my Django side projects are running on 3.14. 🎉 The upgrade didn't require any code changes on my part, but I did see a few return statements in the finally block SyntaxWarnings in a few dependencies.

🐍 Python 3.14 is here! 🎉 ✨ Template strings (t-strings) for safer string interpolation 🚀 Free-threaded Python officially supported (bye GIL!) 🎨 Syntax highlighting in the REPL 📦 Zstandard compression in stdlib 🔍 Remote PDB debugging Full release notes: docs.python.org/3.14/whatsne...

I was moving imports into functions just last week and thinking how horrible this is. Great that we’ll get a solution for this in 3.15! 🤞🤞🎉🎉

Let me post a *non*-subskeet for once... We made a thing! discuss.python.org/t/pep-810-ex... #Python #PEP

Over the weekend, I migrated one of my Django Apps from Gunicorn to Granian. TLDR: • The migration went smoothly. • There were no visible performance gains. • I still can't set a timeout for requests. I also wrote a blog post about this: blog.pecar.me/migrating-g...

I'll be giving a talk about Free-threaded Python at the #01 - Python Lisbon Meetup next week (Oct 2)! 🎉 Hope to see you there! www.meetup.com/python-lisb...

The Python Lisbon Meetup is kicking itself up. We will meet monthly, every first Thursday. Edition #0 is less than a month away, on Sep 4th. Join us on Discord for tuning in! discord.gg/PEnzcJzNyj

The best TED Talk I've seen was about tying shoes. It's mind blowing that we are all taught the weaker form of the knot as kids and never learn that there is a stronger version. www.ted.com/talks/terry...

LLMs really are an amazing peace of technology. How were we ever able to live without them?

Early birthday present has arrived! 🎂

Who's up for showing up at @pyconpt.bsky.social this Thursday to give a 30 minute talk? We just had a last-minute cancellation!

Happy 20th birthday Django! 💝🎂🎉 www.djangoproject.com/weblog/2025/... Our open source journey started 20 years ago today, on July 13th 2005. Come celebrate this big milestone at one of our many community events this year #Python #Django #OpenSource #DjangoBirthday

Has anybody had any luck speeding up Django tests with pytest-xdist? On a single core, the test suite takes about 67s to complete, but regardless of the number of cores I set with xdist, it doesn't finish faster than 60s. ./manage.py test --parallel can finish in less than 20s.

It's easy for an unexpected network request to sneak past your mocks. In a new blog post I show how a Pytest fixture helped me find these sneaky requests and how it will hopefully catch future ones too. 🤞 blog.pecar.me/disable-net...

Has anybody seen a Fatal Python error: Aborted error when running pytest? It seems to come from socket.py but we haven't been able to reproduce outside of pytest. It's sporadic and very hard to reproduce consistently. Any ideas on how to debug this?

I've just ran `docker system prune -f` Total reclaimed space: 359.5GB 😅

I've written a quick post on how to disable the runserver warning that was added in Django 5.2. blog.pecar.me/disable-run...

The scary thing about vibe code is that it appears convincing enough to make you approve changes even when they break things. 😱

The smallest sardines that I’ve ever had at Santos Populares but they were still delicious 🤤🐟🎉

After a long break from writing, I finally published a new blog! It's about generating the image that you should see in the link preview unless it didn't work! 🤞 blog.pecar.me/autogenerat...

📣 The DSF is hiring a Django Fellow! A paid, full-time role to help maintain Django. All the good stuff plus you'll be joining a dedicated team of Fellows 💚 Interested or know someone great? 👉 Apply by July 1: www.djangoproject.com/weblog/2025/... #Django #Python #OpenSource

And today Portugal won the League of Nations! Not a bad weekend for 🇵🇹!!!

The Portuguese ladies dominated the first challenger series event! 🏄‍♀️🏄‍♀️🏄‍♀️

I've made it to #PyConIT25 just in time for Django's 20th birthday cake! 🎂

If I keep this up, I’ll need to take a second vacation just to recover from the current vacation 😅

Your daily reminder that the AI overlords are not to be trusted!

Managed to break into the "e" scores in Balatro. 🎉 Next milestone is to try and hit NaN, but that's almost impossible on a unseeded run, so highly unlikely.

We are all time travellers, journeying together into the future.

Now that the Template Strings PEP has been accepted, we'll be able to reproduce that famous JavaScript slide in Python!

t-strings are coming! peps.python.org/pep-0750/ discuss.python.org/t/pep750-tem...

Anybody in my social circles has any experience with vcrpy? Is it a good tool to use for testing integrations with 3rd party APIs or best to use something like RESPX and create all the response fixtures manually?

We finally migrated the work project to Python 3.13, which means that I'm now using Python 3.13 everywhere. Feels good 😎

Django 5.2 is out today, it's an LTS release (security fixes up to April 2028) that adds support for compound primary keys and a bunch of other neat changes, my highlights here https://simonwillison.net/2025/Apr/2/composite-primary-keys-in-django/

I love pytest, but I could never get used to its fixture system. However, pytest combined with Django's TestCase/SimpleTestCase is amazing, especially when paired with pytest-watcher!

Has anyone been dealing with gunicorn workers running a Django app not shutting down gracefully and needing to be killed with SIGKILL? The weird thing is that I can reproduce this locally with DEBUG=True but not with DEBUG=False. Any hints on how to debug?

I’ve been playing with Cursor, and I’ll admit it feels like magic. However, it will try to sneak hard-to-detect bugs into your codebase at every opportunity. The prompt that generated the issue below was “migrate this project from dramatiq to celery” 🫣

Ever since I started talking about uv, ppl kept asking me how I ship my #Python prod apps in practice nowadays. I turned out to be a much bigger topic than I though, so let's start with with the app setup. From nothing to a best-practice working local project: www.youtube.com/watch?v=mFyE...

We’re building a new static type checker for Python, from scratch, in Rust. From a technical perspective, it’s probably our most ambitious project yet. We’re about 800 PRs deep!

Python is TIOBE's programming language of the year 2024! 🎉 This award is given to the programming language with the highest increase in ratings in one year time 📈 Python gained a whopping 9.3% in 2024 … far ahead of its competition 🥇 https://www.tiobe.com/tiobe-index/ #python #tiobe

My best use of ChatGPT in 2024 has been giving our Karma bot the personality of a manically depressed robot trying to take over the world. His seasonal messages always make me chuckle.