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TIL
Using S3 triggers to maintain a list of files in DynamoDB
— This is a three-quarters-baked experiment that I ran this morning. I'm interested in efficiently tracking which new files have been added to an S3 bucket, where that bucket could potentially hold millions of items.
TIL
Trying out Python packages with ipython and uvx
— I figured out a really simple pattern for experimenting with new Python packages today:
TIL
Running pytest against a specific Python version with uv run
— While [working on this issue](https://github.com/simonw/datasette/issues/2461) I figured out a neat pattern for running the tests for my project locally against a specific Python version using [uv run](https://docs.astral.sh/uv/guides/scripts/):
TIL
Running pytest against a specific Python version with uv run
— While [working on this issue](https://github.com/simonw/datasette/issues/2461) I figured out a neat pattern for running the tests for my project locally against a specific Python version using [uv run](https://docs.astral.sh/uv/guides/scripts/):
TIL
Geocoding from Python on macOS using pyobjc-framework-CoreLocation
— Rhet Turnbull [shared](https://twitter.com/RhetTurnbull/status/1883559820541956605) this [short script](https://gist.github.com/RhetTbull/db70c113efd03029c6ff619f4699ce34) for looking up the named timezone for a given location from Python on macOS using `objc` and the `CoreLocation` framework. It uses the `objc` package and [pyobjc-framework-CoreLocation](https://pypi.org/project/pyobjc-framework-CoreLocation/).
TIL
Downloading every video for a TikTok account
— TikTok may or may not be banned in the USA within the next 24 hours or so. Here's a pattern you can use to download all of the videos from a specific account.
TIL
Calculating the size of all LFS files in a repo
— I wanted to know how large the [deepseek-ai/DeepSeek-V3-Base](https://huggingface.co/deepseek-ai/DeepSeek-V3-Base) repo on Hugging Face was without actually downloading all of the files.
TIL
Named Entity Resolution with dslim/distilbert-NER
— I was exploring the original BERT model from 2018, which is mainly useful if you fine-tune a model on top of it for a specific task.
TIL
Fixes for datetime UTC warnings in Python
— I was getting the following warning for one of my Python test suites:
TIL
Publishing a simple client-side JavaScript package to npm with GitHub Actions
— Here's what I learned about publishing a single file JavaScript package to NPM for my [Prompts.js](https://simonwillison.net/2024/Dec/7/prompts-js/) project.
TIL
GitHub OAuth for a static site using Cloudflare Workers
— My [tools.simonwillison.net](https://tools.simonwillison.net/) site is a growing collection of small HTML and JavaScript applications hosted as static files on GitHub Pages.
TIL
Running cog automatically against GitHub pull requests
— I really like [Cog](https://nedbatchelder.com/code/cog/) ([previously](https://til.simonwillison.net/python/cog-to-update-help-in-readme)) as a tool for automating aspects of my Python project documentation - things like the SQL schemas shown on the [LLM logging page](https://llm.datasette.io/en/latest/logging.html#sql-schema).
TIL
Generating documentation from tests using files-to-prompt and LLM
— I was experimenting with [wasmtime-py](https://github.com/bytecodealliance/wasmtime-py) today and found the [current documentation](https://bytecodealliance.github.io/wasmtime-py/) didn't quite give me the information that I needed.
TIL
Installing flash-attn without compiling it
— If you ever run into instructions that tell you to do this:
TIL
Using uv to develop Python command-line applications
— I finally figured out a process that works for me for hacking on Python CLI utilities using [uv](https://docs.astral.sh/uv/) to manage my development environment, thanks to a little bit of help from Charlie Marsh.
TIL
Using uv to develop Python command-line applications
— I finally figured out a process that works for me for hacking on Python CLI utilities using [uv](https://docs.astral.sh/uv/) to manage my development environment, thanks to a little bit of help from Charlie Marsh.
TIL
Setting cache-control: max-age=31536000 with a Cloudflare Transform Rule
— I ran https://simonwillison.net/ through [PageSpeed Insights](https://pagespeed.web.dev/) and it warned me that my static assets were not being served with browser caching headers:
TIL
Running prompts against images, PDFs, audio and video with Google Gemini
— I'm still working towards adding multi-modal support to my [LLM](https://llm.datasette.io/) tool. In the meantime, here are notes on running prompts against images and PDFs and audio and video files from the command-line using the [Google Gemini](https://ai.google.dev/gemini-api) family of models.
TIL
The most basic possible Hugo site
— With [Claude's help](https://gist.github.com/simonw/6f7b6a40713b36749da845065985bb28) I figured out what I think is the most basic version of a static site generated using [Hugo](https://gohugo.io/).
TIL
Livestreaming a community election event on YouTube
— I live in El Granada, California. Wikipedia calls us [a census designated place](https://en.wikipedia.org/wiki/El_Granada,_California) - we don't have a mayor or city council. But we do have a [Community Services District](https://granada.ca.gov/) - originally responsible for our sewers, and since 2014 also responsible for our parks. And we get to vote for the board members [in the upcoming November election](https://granada.ca.gov/2024-candidate-listing)!
TIL
Upgrading Homebrew and avoiding the failed to verify attestation error
— I managed to get my Homebrew installation back into shape today. The first problem I was having is that it complained that macOS Sequoia was unsupported:
TIL
Collecting replies to tweets using JavaScript
— I ran [a survey](https://twitter.com/simonw/status/1843290729260703801) on Twitter the other day to try and figure out what people mean when they use the term "agents" with respect to AI.
TIL
Compiling and running sqlite3-rsync
— Today I heard about the [sqlite3-rsync](https://sqlite.org/draft/rsync.html) command, currently available in a branch in the SQLite code repository. It provides a mechanism for efficiently creating or updating a copy of a SQLite database that is running in WAL mode, either locally or via SSH to another server.
TIL
Building an automatically updating live blog in Django
— OpenAI's DevDay event yesterday (October 1st 2024) didn’t invite press (as far as I can tell), didn’t livestream the event and didn’t allow audience livestreaming either. I made a last minute decision [to live blog the event](https://simonwillison.net/2024/Oct/1/openai-devday-2024-live-blog/) myself.
TIL
How streaming LLM APIs work
— I decided to have a poke around and see if I could figure out how the HTTP streaming APIs from the various hosted LLM providers actually worked. Here are my notes so far.
TIL
Testing HTML tables with Playwright Python
— I figured out this pattern today for testing an HTML table dynamically added to a page by JavaScript, using [Playwright Python](https://playwright.dev/python/):
TIL
Using namedtuple for pytest parameterized tests
— I'm writing some quite complex [pytest]() parameterized tests this morning, and I was finding it a little bit hard to read the test cases as the number of parameters grew.
TIL
Using sqlite-vec with embeddings in sqlite-utils and Datasette
— Alex Garcia's [sqlite-vec](https://github.com/asg017/sqlite-vec) SQLite extension provides a bunch of useful functions for working with vectors inside SQLite.
TIL
Using pytest-django with a reusable Django application
— I published a reusable Django application today: **[django-http-debug](https://github.com/simonw/django-http-debug)**, which lets you define mock HTTP endpoints using the Django admin - like `/webhook-debug/` for example, configure what they should return and view detailed logs of every request they receive.
TIL
Assistance with release notes using GitHub Issues
— I like to write the release notes for my projects by hand, but sometimes it can be useful to have some help along the way.
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