Anže

Writing Python :python:, Django :django: and surfing waves 🏄‍♂️

Projects:
🧑‍💻 https://fedidevs.com find awesome devs across the fediverse
💻 https://github.com/anze3db/django-tui a TUI for all your Django commands

GitHub: https://github.com/anze3db
Website: https://pecar.me
Blog: https://blog.pecar.me
Twitter: https://twitter.com/anze3db

Public Key

npub15wdfr9znyzrrucep9sa57p4p823cpue65gch3r83wtn8qxax2l6qw8rte4

NIP-05 Address

anze3db_at_fosstodon.org@momostr.pink

Profile Code

nprofile1qqs28x53j3fjpp37vvsjcw60q6sn4guq7va2yvtc3nch9ensrwn90aqprpmhxue69uhhyetvv9ujumt0d4hhxarj9ecxjmnt5tdv5f

Publishing to

relay.momostr.pink

Author Public Key

npub15wdfr9znyzrrucep9sa57p4p823cpue65gch3r83wtn8qxax2l6qw8rte4

Show more details

Last Notes

2026-05-13 08:38:57 UTC

Fedidevs had quite an outage today. It went offline just as I went to bed and I didn't see it until I woke up this morning 🫣
Still better uptime than GitHub 😅
https://cdn.fosstodon.org/media_attachments/files/116/566/362/502/471/567/original/d3909dcf9cd5a3f4.png

2026-03-13 11:59:02 UTC

I wrote a blog post about some of the options for adding type checking to your Django project!
Historically, Django projects have been tough to type-check, but the future feels bright, especially if PEP 827 gets accepted!
https://blog.pecar.me/typing-your-django-project-in-2026/

2025-12-01 16:10:11 UTC

Day 1 of #adventofcode felt a bit harder than previous day 1 puzzles. It took me way longer to figure out part 2 than I care to admit, but I'm blaming this on my sleepy brain 😅
My code took 1.1ms for both parts without any perf optimizations 🎉
Eleven more to go!
https://cdn.fosstodon.org/media_attachments/files/115/645/180/171/529/537/original/b6d708c4993f606c.png

2025-10-20 08:55:09 UTC

us-east-1 is down, happy Monday!
https://cdn.fosstodon.org/media_attachments/files/115/405/652/528/467/943/original/6ea24e70cba0ada7.png

2025-10-11 11:16:02 UTC

- reply

I have not. Can it generate a count from a left outer join?

2025-10-11 09:23:55 UTC

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!
https://cdn.fosstodon.org/media_attachments/files/115/354/804/798/945/653/original/cf9114068356c21a.png

2025-09-24 18:23:10 UTC

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!
https://www.meetup.com/python-lisbon-meetup/events/311204520/

2025-06-10 13:58:01 UTC

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! 🤞
https://blog.pecar.me/autogenerating-og-image-with-jekyll

2025-06-08 22:09:49 UTC

- reply

And today Portugal won the League of Nations! Not a bad weekend for 🇵🇹!!!
https://cdn.fosstodon.org/media_attachments/files/114/650/025/303/553/805/original/37bb03483e8b42de.png

2025-05-01 13:25:47 UTC

Your daily reminder that the AI overlords are not to be trusted!
https://cdn.fosstodon.org/media_attachments/files/114/432/799/227/909/696/original/376548c10cc46bcd.png

2025-04-11 13:43:14 UTC

Now that the Template Strings PEP has been accepted, we'll be able to reproduce that famous JavaScript slide in Python!
https://cdn.fosstodon.org/media_attachments/files/114/319/621/732/848/455/original/fe63fe21f6fc3601.png

2025-04-09 07:56:01 UTC

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?

2025-03-26 09:52:22 UTC

- reply

not true. REST is one of the most widespread software architecture styles and open to anyone to use 🤪

2025-03-25 20:51:37 UTC

- reply

thanks! I’ll give your way a try to see how I feel about it 😀

2025-03-25 20:05:44 UTC

- reply

interesting. I have more questions if you don’t mind 😅
Is it always one object per fixture? How do you handle lists of objects or crating an object hierarchy like company - project - task - user?

2025-03-25 18:18:13 UTC

- reply

do you end up with one or more functions per model? Feels a bit too boilerplatey to me. What I love the most about baker (as opposed to something like Faker) is that you don't have to write any extra classes/functions to generate model instances. You add baker.make calls to setUpTestData and you are good to go.

2025-03-25 13:00:48 UTC

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!

2025-03-23 20:57:43 UTC

- reply

I figured out that django-browser-reload was preventing gunicorn from shutting down cleanly.
In production (where django-browser-reload isn't enabled), I was seeing SIGKILL because of memory issues, so not related to worker shutdown as I initially thought.
I'm unsure if this helps you debug your issue, though.

2025-03-23 20:21:55 UTC

- reply

I think what I'm seeing is a bit different. I don't have any issues with runserver, but if gunicorn serves one request, that worker won't exit cleanly and will require a SIGKILL.

2025-03-23 08:00:05 UTC

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?
https://cdn.fosstodon.org/media_attachments/files/114/210/688/503/723/518/original/298bfb80751511ac.png

2025-03-22 12:33:00 UTC

- reply

agreed, but I wonder if a good system prompt or a specialized Django LLM trained on common pitfalls like this could do better.

2025-03-22 11:50:08 UTC

- reply

Since starting a bg job before the changes in the database commit is such a common issue, Celery added delay_on_commit in version 5.4, how long till LLMs start recommending it?
https://docs.celeryq.dev/en/latest/reference/celery.contrib.django.task.html#celery.contrib.django.task.DjangoTask.delay_on_commit

2025-03-22 11:49:47 UTC

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” 🫣
https://cdn.fosstodon.org/media_attachments/files/114/205/928/733/260/861/original/51f0d023d142444d.png

2025-03-22 01:52:46 UTC

- reply

Update: I'm not showing the follow-all stats (yet), but I'm now using this data to sort starter packs by popularity.
https://cdn.fosstodon.org/media_attachments/files/114/203/575/293/530/866/original/c1854814dcceee0c.png

2025-03-03 17:34:28 UTC

- reply

there has been no recent code changes in this area, but I did adjust the visibility of accounts since the initial launch based on people's feedback.
If you let me know which account you are referring to, I can look into it. But I can't find any iceshrimp.de accounts added to any starter packs. 🤔

2025-03-02 20:52:45 UTC

- reply

It is a little funny, yes 😆 but I don't think it's wrong - I don't want to limit starter pack creation (unless it's for a nefarious purpose).

2025-03-02 20:34:40 UTC

- reply

Great suggestions, thanks! I wish I had the foresight to add tracking of follow all clicks, but unfortunately I didn't, so there isn't any historical data available 😔

2025-02-28 23:43:22 UTC

The Fedidevs Starter Packs UI is now available in 10 languages! 🎉
3 new were added in the last few months:
* 🇩🇰 Danish (thanks @npub1pv6…a7d8)
* Catalan (thanks @npub1e84…pylt and sorry for the belated announcement 😅)
* 🇵🇹 Portuguese (thanks to my SO ❤️)
https://fosstodon.org/@anze3db/113769198358285929
https://cdn.fosstodon.org/media_attachments/files/114/084/146/057/504/215/original/00ad73fe3fee42e2.png

2025-02-28 19:40:31 UTC

- reply

oh great! Don't worry if you got something wrong, we can always fix it afterwards!
Do you need help setting up a github account or with git? If you want to you can also send me the translated po file through email and I'll add it on your behalf.

2025-02-28 01:43:15 UTC

- reply

hey! I've just pushed the danish po file: https://github.com/anze3db/fedidevs/blob/main/locale/da/LC_MESSAGES/django.po if you open it in a po file editor (like Poedit) it should help you get all the strings translated.
Thanks so much for offering to do this, adding the Danish translation would be awesome! 🙇‍♂️

2025-02-21 08:19:48 UTC

- reply

I'm glad you found it useful! 🙇‍♂️

2025-01-31 21:49:38 UTC

- reply

Yeah, I agree, with the amount of starter packs right now I'll have to figure out filtering. Thank you for the suggestion, I'll see what I can do 🙇‍♂️

2025-01-29 09:51:24 UTC

- reply

Hey Michael! My goal is to support all types of services built on top of ActivityPub, but for now I still have some Mastodon specific code that I need to untangle first.
Fedidevs is a side project so my time on it is limited and I can't commit to a deadline, but supporting Pixelfed is already on my radar!

2025-01-27 14:02:07 UTC

- reply

Update: You should now be to add todon.eu and todon.nl to starter packs again.
Keep in mind that the instance defaults are privacy centered so I about half of the accounts still won’t be eligible until they enable discoverable and opt in to search engine indexing in their account settings.

2025-01-26 23:39:35 UTC

- reply

Hey, yes, admin of todon.eu and todon.nl asked me to block his sites because not all aspects of fedidevs are opt-in.
We have since then resolved his concerns and I was supposed to reenable the sites a few days ago, but I unfortunately got busy. I'll try to reenable both sites soon.

2025-01-21 00:08:28 UTC

- reply

I doubt you’ll see any change in the benchmark for these, but let me know if you notice anything, I'm also curious!

2025-01-19 10:23:25 UTC

- reply

I received the same email. It didn't look like an obvious scam until they mentioned crypto 😂

2025-01-06 11:10:24 UTC

I've updated the starter pack creation process and added a preview step to make it easier to see who you’ve added. ✅
Also starter packs now start in draft state and aren’t published to the community starter pack list until you publish them on the starter pack screen.
https://fedidevs.com/starter-packs/
https://cdn.fosstodon.org/media_attachments/files/113/781/100/776/485/374/original/b4674c99874d082e.png
https://cdn.fosstodon.org/media_attachments/files/113/781/101/062/537/350/original/f00ace6e414f6d65.png

2025-01-03 15:18:33 UTC

- reply

I think you can reproduce the whole of litestack in Django already:
Cache: `DatabaseCache` backend works with SQLite, right?
Queue/pub/sub: https://github.com/RealOrangeOne/django-tasks + DatabaseBackend
Full text search: ORM already supports it
But I guess we could wrap it all in a separate package for marketing purposes? 😂

2025-01-01 11:56:22 UTC

- reply

Hey! What are the issues? I am happy to also look into it myself.
Thanks again for your contribution, and happy new year!

2024-12-11 00:32:12 UTC

I've just shipped a small update to fedidevs starter packs.
You now don't have to log in to see if you are included in any of the starter packs, but can instead search for your username directly.
I'm still working on other safety features, thank you all for the support and patience! ❤️
https://cdn.fosstodon.org/media_attachments/files/113/631/371/461/550/832/original/e52181954564f7af.png

2024-12-04 17:23:56 UTC

- reply

Is this about the Mountains Starter Pack? Something is definitively odd, your account, Sander, was connected to the site after the starter pack was created 🤔

2024-12-01 17:09:57 UTC

- reply

Great! I imported the list into your starter pack.
Many of the accounts were from instances I haven't indexed/seen before, so accounts were not showing up in the search.
I definitively want to support nondev starter packs, so this is excellent feedback for me. I'll work on improving the UI for when the instance is not indexed, but in the meantime, if you have any other accounts to import, don't hesitate to send them my way!

2024-12-01 00:00:24 UTC

@npub1p6n…xcze Hey Antoine! I saw that you'd created a starter pack on fedidevs! Sorry, I don't have a way for you to import accounts, but if you send me the list of accounts that you want to add, I'll add them to your starter pack. Cheers!

2024-11-28 11:00:11 UTC

Even though Lisbon is further west, San Francisco is closer to Amsterdam than Lisbon 🤯
How will the Flat Earth Society explain this?!
https://cdn.fosstodon.org/media_attachments/files/113/560/230/820/632/935/original/4f36ceaf56df0fdf.png
https://cdn.fosstodon.org/media_attachments/files/113/560/230/944/414/893/original/dc2de232606128c0.png

2024-11-27 12:29:00 UTC

- reply

never mind, it's still broken! But it was working perfectly for one day after the update 😖
https://cdn.fosstodon.org/media_attachments/files/113/554/917/749/903/683/original/7d467d3cb236d313.mp4

2024-11-27 11:00:06 UTC

I didn't see anyone talking about this, but the Sequoia 15.1.1 update fixed the emoji picker in Firefox! 🥳
https://cdn.fosstodon.org/media_attachments/files/113/554/568/347/911/504/original/6d2d7ccffd11099e.png

2024-11-27 01:16:28 UTC

- reply

no, this is the first time I hear about Pulumi. An interesting project, but I'm guessing it's nowhere as popular as terraform for infra as code, right?

2024-11-26 15:22:42 UTC

- reply

I've tried it in Python and it's even worse (0.77) 🙈
https://cdn.fosstodon.org/media_attachments/files/113/549/938/366/414/470/original/3ce7d6adc972825b.png

2024-11-23 11:36:17 UTC

- reply

Yes, that's what I've been reading + https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/private-content-signed-urls.html
Setting all of this up with terraform is what I found challenging. In any case I think I figured it all out, so now I guess I should write a blog about it for future me and others 😄

2024-11-23 10:00:07 UTC

- reply

It's okay to do this in some cases, but in general, you should set up CloudFront with signed URLs to better control who can access the uploaded files.
Django Storages supports signed URLs out of the box, but I couldn't find good docs on how to set it up. Any leads?

2024-11-23 10:00:06 UTC

This past week, I've spent a lot of time researching how to set up Django Storages with S3. Almost every blog or tutorial I've seen asks you to make the S3 bucket public, even though the AWS Console UI tries to discourage you from it:
https://cdn.fosstodon.org/media_attachments/files/113/531/683/166/130/340/original/21fb42192420c069.png

2024-11-17 11:50:07 UTC

- reply

I’ve been thinking of adding starter packs to fedidevs ever since I saw how well they work on Blusky. I haven’t found the time to add them just yet, but hopefully soon 🤞

2024-08-31 14:00:31 UTC

New toy has arrived! ❤️
https://cdn.fosstodon.org/media_attachments/files/113/056/994/439/436/037/original/6276b249f3d24129.jpeg

2024-08-29 07:47:12 UTC

- reply

Do you have a blog post/docs explaining the benefits of packaging an app that's not getting published on PyPI/private repo that I could read to better understand your point of view?
I've always seen it as a ritual that's easy to mess up and break a deployment without many benefits, but now I'm beginning to think there's more to it and I want to learn more about it.

2024-08-29 07:34:45 UTC

- reply

I don't know if I fully agree with this, I worked on “engineered” Python projects (Django/Flask) for over 10 years and I never saw a practical benefit to having the web app packaged.
To me lib vs app distinction fits better in my brain. You create a package when you want to use it as a lib in another project.

2024-08-29 07:27:14 UTC

- reply

I wouldn't say it's a step back. It's a simpler default that covers more use cases.
It's easier for someone like you to figure out how to add the packaging than it is for someone who has just finished the Django tutorial to figure out how to remove it, or worse, figure out how to properly package a Django app.

2024-08-28 20:06:41 UTC

Amazing! The uv team shipped first class support for Python projects that are not designed as packages (think Django aplications!).
They even switched some defaults around to better support this use case! 💚
https://github.com/astral-sh/uv/releases/tag/0.4.0

2024-08-27 12:08:18 UTC

- reply

There is probably a measurable difference when the tracing is on, but practically I don't think it makes an actual impact at least not in Python.
Most tracing tools also allow you to configure the sample rate so you can have tracing on for like 0.1% of your requests which will still show you trends but limits the impact.

2024-08-27 10:58:29 UTC

- reply

Hm... l managed to shave of 100ms of rendering time by inlining an inclusion tag, that I was using inside a for loop.
I'll report back if this change also translates in a similar improvement in prod where the cached template loader is used.
The commit diff is here if you are curious: https://github.com/anze3db/fedidevs/commit/7bf9870d8ab42924ea4b23a292af3ecf0177dc9b
https://cdn.fosstodon.org/media_attachments/files/113/033/628/956/382/591/original/4d5d680432fd7671.png
https://cdn.fosstodon.org/media_attachments/files/113/033/629/235/205/003/original/6f147ee37ddb34f1.png

2024-08-27 09:25:30 UTC

- reply

yeah, could be, but I'm now digging into this and it looks like template rendering is taking the longest even in some faster requests. I'll see if I can figure out what could be causing this.
https://cdn.fosstodon.org/media_attachments/files/113/033/263/592/887/651/original/9f1f2bbf19f5e037.png

2024-08-27 09:04:55 UTC

- reply

the SD card issue was my own blunder. I am using an SD card that can only read up to 4mb/, but I could have easily gotten one that goes up to 100mb/s 😅
Also, this was the only trace that I have out of 100k requests from yesterday that was over 400ms long.

2024-08-27 08:56:52 UTC

- reply

the SD card that I'm using is too slow for this disk caching to be viable 😅

2024-08-27 08:51:26 UTC

- reply

There is one 2.7ms db query that gets run during template rendering. The other three queries are run before the rendering starts and are also below 200ms, so I'm pretty sure the template rendering took the longest at around 500ms.
The raspberry pi doesn't have the fastest CPU so this might not be an issue on a regular host.

2024-08-27 08:18:26 UTC

First time that I see template rendering being a bit of a bottle neck in a Django app.
This was on a Raspberry Pi 4 while all 4 cores were over 80%.
https://cdn.fosstodon.org/media_attachments/files/113/033/000/074/953/064/original/bedaed7d74470e46.png

2024-08-08 11:25:47 UTC

- reply

I’ll try it out, but the browser support really isn't great 😅
https://cdn.fosstodon.org/media_attachments/files/112/926/152/656/691/075/original/20cbd52764ed2522.jpeg

2024-05-22 13:35:52 UTC

- reply

yes, put your name/contact on the title page and then next slide should be the content of your talk and you introduce yourself as you go through it. A dedicated about me slide should be avoided.

2024-05-22 13:22:54 UTC

Quick takeaway from the public speaking workshop: you don’t need an about me slide.
BRB while I update my presentations 😂
#PyconIT2024