Posts tagged: python

FastAPI is a modern and efficient web framework for Python, built on top of the Starlette web framework, and pydantic for data validation and serialization. From the FastAPI documentation [1] # [2] FastAPI is a modern, fast (high-performance), web framework for building APIs with Python based on standard Python type hints. The key features are: - Fast: Very high performance, on par with NodeJS and Go (thanks to Starlette and Pydantic). One of the fastest Python frameworks available. - Fast to code: Increase the speed to develop features by about 200% to 300%. * - Fewer bugs: Reduce about 40% of human (developer) induced errors. * - Intuitive: Great editor support. Completion everywhere. Less time debugging. - Easy: Designed to be easy to use and learn. Less time reading docs. - Short: Minimize code duplication. Multiple features from each parameter declaration. Fewer bugs. - Robust: Get production-ready code. With automatic interactive documentation. - Standards-based: Based on (and fully compatible with) the open standards for APIs: OpenAPI (previously known as Swagger) and JSON Schema. Mentioned in 2025 Stack Overflow Survey [3] # [4] The +5 point increase for Fas...

FastAPI [1].">Starlette has a head request that works right along side your get requests. This morning I fiddled around with custom routes for GET and HEAD, but had to manually set some things about the file, and was still missing e-tag in the end. Turns out as a developer you can just [2] add a head route to your get routes and starlette will strip the content for you, while preserving all of those good headers that fastapi FileResponse created automatically for you. from fastapi import APIRouter from fastapi.response import FileResponse from fastapi import Request from pathlib import Path router = APIRouter() @router.get("/file/{filename}") @router.head("/file/{filename}") async def get_file(filename: str, request: Request,): headers = { "Cache-Control": "no-cache, no-store, must-revalidate", } from pathlib import Path filename = Path(f"data/{filename}") if not filename.exists(): raise HTTPException(status_code=404, detail="File not found") return FileResponse(filename, headers=headers) Here is an example of the response with curl. ❯ curl -I -L "http://localhost:8100/api/file/e5523925-1565-454c-bab3-c70c4deabc83.webp?width=250" HTTP/1.1 200 OK date: Wed, 22 Oct 202...

- anthony has some of the best python highlight videos each year. This might be a good sign, but each year there seems to be less and less that I am chomping at the bit to get to. I thought the remote debugger looked every interesting, his use case for babi seemed very interesting. I wonder what textual would look like built in a 3.14 world, would it still have built its own debugger/console? uv tool run --python=3.14 babi Without a process flag you need sudo permissions to attach a pdb debugger similar to gdb. ps -ef | grep babi uv tool run --python=3.14 python -m pdb -p8605 [1] Note This post is a thought [2]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://dropper.waylonwalker.com/api/file/b5e1a34d-c198-440a-ab30-4498bfa6962a.png [2]: /thoughts/

PEP 735 – Dependency Groups in pyproject.toml | peps.python.org This PEP specifies a mechanism for storing package requirements in pyproject.toml files such that they are not included in any built distribution of the project. Python Enhancement Proposals (PEPs) · peps.python.org [1] PEP 735 describes dependency groups as sets of optional dependencies that are not shipped with the package but intended for development purposes. The PEP includes an example for groups that include test, docs, typing, and a combo typing-test. [dependency-groups] test = ["pytest", "coverage"] docs = ["sphinx", "sphinx-rtd-theme"] typing = ["mypy", "types-requests"] typing-test = [{include-group = "typing"}, {include-group = "test"}, "useful-types"] This is implemented in uv and can be used by several of their commands. uv sync --group test uv run --group test uv add --group test pytest uv remove --group test pytest uv export --group test uv tree --group test Dependency Groups are not Extras # [2] The docs describe extras as being intended to ship with the application and dependency groups intended for development. The spec allows both to exist with the same name, but care should be taken as too...

TIL: Loading .env files with uv run Replacing python-dotenv with uv https://daniel.feldroy.com · daniel.feldroy.com [1] I smell a dependency to python-dotenv dying in my workflow. I originally read the title of the post and thought, “I know how to manage .env and almost skipped it”. I’m leaning more and more on uv run these days, so this should just [2] go in my [[ just file ]] to make it easy to run. Note This post is a thought [3]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://daniel.feldroy.com/posts/til-2025-09-env-files-with-uv-run [2]: /just/ [3]: /thoughts/

I’ve been leaning on lazy-self-installing-python-scripts [1] more and more, but I did not realize how much tooling that uv [2] gives you to help manage your scripts. uv init --script up uv add --script up typer rich uv remove --script up rich sed -i '1i #!/usr/bin/env -S uv run --script' up chmod +x up ./up The result is a script that looks like this, its executable as what looks like regular command in your shell. #!/usr/bin/env -S uv run --script # /// script # requires-python = ">=3.13" # dependencies = [ # "typer", # ] # /// def main() -> None: print("Hello from up!") if __name__ == "__main__": main() References: [1]: https://treyhunner.com/2024/12/lazy-self-installing-python-scripts-with-uv/ [2]: https://docs.astral.sh/uv/getting-started/installation/

I have a couple of use cases for simple qr codes in python coming up. One is for blog posts, the other is for auth into a new server application logged to a terminal. I tried the qrcode [1] library and it does not look as nice to me and I found pyqrcode [2] to be quite nice. import pyqrcode url = pyqrcode.create('https://waylonwalker.com/qr-codes-in-python') url.svg('qr-codes-in-python.svg', scale=8) print(url.terminal(quiet_zone=1)) url.svg('qr-codes-in-python.svg', scale=12) url.svg('qr-codes-in-python.svg', omithw=True) # width is controlled by the container url.svg('qr-codes-in-python.svg', omithw=True, module_color='#ffd119') url.svg('qr-codes-in-python.svg', omithw=True, module_color='#ff69b4', background='#2b034c') result # [3] Here is the final svg result. Here is what it looks like in the terminal. [4] If you want fancier qrcodes check out https://mydigitalharbor.com/ References: [1]: https://pypi.org/project/qrcode/ [2]: https://pypi.org/project/pyqrcode/ [3]: #result [4]: https://dropper.waylonwalker.com/api/file/c644bd34-b5da-48a3-b6cf-c89efb546114.png

GitHub - rushter/selectolax: Python binding to Modest and Lexbor engines. Fast HTML5 parser with CSS selectors for Python. Python binding to Modest and Lexbor engines. Fast HTML5 parser with CSS selectors for Python. - rushter/selectolax GitHub · github.com [1] Selectolax you have my attention! I will be giving this a try for markata which often suffers from slow beautifulsoup. It appears to have everything I need for my simple use cases. [2] Note This post is a thought [3]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://github.com/rushter/selectolax [2]: https://dropper.waylonwalker.com/api/file/b5d8930f-59e0-4947-9500-717f66ce33dc.png [3]: /thoughts/

uv run for running tests on versions of Python Using uv run with make to replace tox or nox for testing multiple versions of Python locally. https://daniel.feldroy.com · daniel.feldroy.com [1] Such a fantastic use of uv, its so fast and flexible and does everything I need that next time I go to set up some more complex testing like this I’m going to lean towards it more than i would something like tox. In the post Daniel sets up matrix testing for testing out different versions of python with the same pytest test suite. Note This post is a thought [2]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://daniel.feldroy.com/posts/2025-07-uv-run-for-testing-python-versions [2]: /thoughts/

I’ve been a long user of pygments, it’s been the thing that injects <spans> with funny little class names like sc and si into the code blocks of my website. I’ve even gone as far as implementing a plugin for md-it [1], but I had no idea how to re-style it. I long ago got a theme that looked good enough from somewhere and just used it, maybe I pulled something from their docs site and forgot. Today I learned you can list all the themes easily from the library itself, and render out new css. from pygments.styles import get_all_styles list(get_all_styles()) # [ # 'abap', # 'algol_nu', # 'algol', # 'arduino', # 'autumn', # 'borland', # 'bw', # 'colorful', # 'default', # 'dracula', # 'emacs', # 'friendly_grayscale', # 'friendly', # 'fruity', # 'github-dark', # 'gruvbox-dark', # 'gruvbox-light', # 'igor', # 'inkpot', # 'lightbulb', # 'lilypond', # 'lovelace', # 'manni', # 'material', # 'monokai', # 'murphy', # 'native', # 'nord-darker', # 'nord', # 'one-dark', # 'paraiso-dark', # 'paraiso-light', # 'pastie', # 'perldoc', # 'rainbow_dash', # 'rrt', # 'sas', # 'solarized-dark', # 'solarized-light', # 'staroffice', # 'stata-dark', # 'stata-light', # 'stata', # 'tango', # 'trac', # 'vim'...

uv cache prune If you're running low on disk space and are a uv user, don't forget about uv cache prune: uv cache prune removes all unused cache entries. For example, the cache … Simon Willison’s Weblog · simonwillison.net [1] Good point to check on your uv cache if you are running low on disk space. I checked mine today, and it wasn’t too bad so I left it alone. du -sh `uv cache dir` Note This post is a thought [2]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://simonwillison.net/2025/Jul/8/uv-cache-prune/#atom-everything [2]: /thoughts/

Notes – 09:32 Thu 19 Jun 2025 Notes – 09:32 Thu 19 Jun 2025 dbushell.com · dbushell.com [1] David’s design on his blog is fantastic likely from years of small improvements like this converting ugly quotes to pretty quotes and optimizing fonts. It’s common for markdown libraries to convert the first to the second like my build script does. This is new to me, I had no idea that markdown libraries did this, I’m now interested if markdown-it does it. For subsetting I use the fontTools library but I’ve no idea how to setup Python environments. I got it working once and failed to document the process. David, David, David, I’m sorry python has done you this dirty. I should do a post on making python environments in the age of Posts tagged: uv [2]. You got options to run in docker/podman, a whole ass vm, uv venv, uvx, uv run, uv script, python -m venv, virtualenv, poetry, hatch, and too many more. The ones that matter are containers or uv. Note This post is a thought [3]. It’s a short note that I make about someone else’s content online #thoughts References: [1]: https://dbushell.com/notes/2025-06-19T09:32Z/ [2]: /tags/uv/ [3]: /thoughts/