New Bite on the platform: Subclassing: Vehicles in Motion #python

I really like the retry use case to demonstrate #python decorators:

What are you doing with #python this week?

Haven't been here in a while? What's happening?

Heads up I am running another Snipster #Python training cohort next week - we'll build this cool app:

Thanks for joining us 🎧 @tiangolo.com 🎉 and for all you do with @fastapi.tiangolo.com, other libs, and now FastAPI Cloud 😍 It will be so nice to deploy FastAPI apps with just: `fastapi deploy` 🚀 www.youtube.com/watch?v=Q_8a...

I've completed "Build unix' wc program in python" on @pybites.bsky.social 🐍🎉 - pybitesplatform.com/bites/build-...

snakeviz == nice for profiling + visualizing 💡 💪 🐍 uv run python -m cProfile -o profile.out -m script_or_package uv add --dev snakeviz uv run snakeviz profile.out (Screenshot: me profiling slow Pandas code as a candidate to refactor using Polars 🔥) #python #debugging

I've completed "Pybites date generator" on @pybites.bsky.social 🐍🎉 - pybitesplatform.com/bites/pybite... #python

🚀 Built a #Streamlit front-end on top of a #FastAPI backend for our next cohort (starting next week!) 🚀 Great stack for quickly prototyping a front-end, all #Python, no JS 😎 (For more serious web apps you definitely want JS and/or htmlx though 💡)

7 adjacent skills that made me a better #developer (early on): 💻 Vim + CLI 🛠 Support/troubleshooting 🚢 Building complete apps ✍️ Writing/blogging ✅ Automating tasks 🔁 Git 🤝 Mentoring/teaching Code is just the start. These built the real foundation. #developers #python

#vibecoding, is it doing more harm than good?

TIL about the 🔥 chardet library — it guesses unknown file encodings! 📄 Write text in latin-1 ➡️ try to read as utf-8 ➡️ 💥 UnicodeDecodeError. 👨‍💻 Solution:

🚀 Build real software, not just more tutorials. Join our 6-week Pybites Developer Cohort (PDC Professional) and ship a real app: ✅ Clean arch + TDD ✅ CLI + FastAPI ✅ CI/CD + Cloud deploy ✅ Portfolio-ready repo Start May 12 → pybitescoaching.com

𝟱 𝗰𝗼𝗼𝗹 𝘄𝗮𝘆𝘀 to use the underscore in #Python 🐍💡 • Ignore 𝘃𝗮𝗹𝘂𝗲𝘀 when unpacking • Loop 𝗽𝗹𝗮𝗰𝗲𝗵𝗼𝗹𝗱𝗲𝗿 • Access 𝗹𝗮𝘀𝘁 𝗿𝗲𝘀𝘂𝗹𝘁 in REPL • Format 𝗹𝗮𝗿𝗴𝗲 𝗻𝘂𝗺𝗯𝗲𝗿𝘀 • Define "𝗽𝗿𝗶𝘃𝗮𝘁𝗲" methods (convention) See below 👇

Potentially underused #Python 🐍 feature: 𝘀𝗲𝘁 𝗼𝗽𝗲𝗿𝗮𝘁𝗶𝗼𝗻𝘀 💡 Here's an example how we can remove or update tags, casting new + old into sets, then performing 𝘴𝘦𝘵 𝘰𝘱𝘦𝘳𝘢𝘵𝘪𝘰𝘯𝘴 🔥 Have you used them, how? 😍 (Still on the fence about 𝘸𝘢𝘭𝘳𝘶𝘴, but couldn't bear doing 𝘴𝘵𝘳𝘪𝘱() twice 😅)

Seems pydantic validators don't hit with sqlmodel table=True - have you hit this and if so, how have you added validation to your model (e.g. min length field = N characters)?

Making a temporary file/dur is very useful for 𝘁𝗲𝘀𝘁𝗶𝗻𝗴. In the example below, we first use 𝘛𝘦𝘮𝘱𝘰𝘳𝘢𝘳𝘺𝘋𝘪𝘳𝘦𝘤𝘵𝘰𝘳𝘺 to create 5 temp files. This is a great example of using a 𝗰𝗼𝗻𝘁𝗲𝘅𝘁 𝗺𝗮𝗻𝗮𝗴𝗲𝗿 — a clean way to automatically clean up resources. pytest makes it even easier using the 𝘵𝘮𝘱_𝘱𝘢𝘵𝘩 fixture:

Do you know all these 5 powerful uses of * in #Python? – Keyword-only args – Extended unpacking – Flexible funcs with *args – Unpack into func calls – Merge iterables 👇 See examples below — which ones do you use the most, and which ones are new to you? #coding #tips

'Scratch your own itch' is a good driver to build stuff. 💪 And even trivial things can lead to interesting projects. 💡 See this emoji searcher project for example, I still use this every day to find + copy emojis 🚀 github.com/bbelderbos/e... What are you building with #Python?

Becoming a proficient #Python dev isn’t just about syntax, it’s about building usable apps with clean, testable, well-structured code. That’s what we coach in our 6-week cohort starting next month. Real apps. Real feedback. Real growth. 💪 More info: pybitescoaching.com

A common #Polars saying: "𝙄 𝙘𝙖𝙢𝙚 𝙛𝙤𝙧 𝙩𝙝𝙚 𝙨𝙥𝙚𝙚𝙙, 𝙗𝙪𝙩 𝙨𝙩𝙖𝙮𝙚𝙙 𝙛𝙤𝙧 𝙩𝙝𝙚 𝙨𝙮𝙣𝙩𝙖𝙭" 😍 I see why now — it's 𝗯𝗲𝗮𝘂𝘁𝗶𝗳𝘂𝗹 and 𝗳𝗮𝘀𝘁. 📈 Switched from Pandas? What’s been your biggest win (or pain)? 🤔 #Python #Rust #DataAnalytics

After just 3 weeks in our upcoming cohort (halfway point), you’ll have a working CLI journal app: ✅ Typer ✅ clean code ✅ testing ✅ real end-to-end project We’ve coached 100s of devs 1:1 — now bringing that magic to our new cohort programs 🎉 🔗 pybitescoaching.com

De-duped our books category page by reconciling similar titles, e.g. think & grow rich → think and grow rich everything is f*cked → everything is # @%!ed Just stdlib -> `difflib`, no external deps 🚀 (Fun fact: Django’s manage.py uses this too btw 😎) #python #tips

Feel like my Python is getting rusty with AI finishing all my… sentences. Doing some code challenges on @pybites.bsky.social with no code completions as nature intended 🪴

Pydantic is awesome for data cleaning + validation, but if you want something quick + stdlib only, you can also use dataclasses + `__post_init__` 🐍 😍 - see example below. 🚀 #python #tips

Defensive coding 101 💡👇 🛡️ 1. Validate early, fail fast 💥 2. No mutable default args 🔐 3. Use context managers 😵 4. Handle the weird / unexpected edge cases 😅 5. Expect misuse 🔄 6. Make side effects obvious 🧪 7. Break your own code with tests (more than just happy path)

AI won't take your job as a programmer. But resisting it might. 😱

Nice, TIL that <details> + <summary> tags are pure HTML5, supported by modern browsers. No JavaScript needed 😎 🚀

Well said! Focus on programmatic thinking Not learning yet another shiny new tool per se

Have been using #tailwind manually in #django, but noice! This does make it a lot easier! django-tailwind.readthedocs.io/en/latest/in...

pytest is awesome no? what is your favorite feature or plugin?

Finally learned how to make an 'em dash' (—) on Mac :) Shift + Option + - (Spanish keyboard also gets you nice « » (html @raquo and &laquo) chars using curlies)

If you struggle to understand #Python OOP, why not pull from one of the most famous allegories in #philosophy — Plato’s Cave? 💡

Who has experienced this? #AI tools: quick wins, but more + longer debugging? (image source: www.reddit.com/r/Programmer...)

Another #python stdlib gem 💎 + context manager 😎 `tempfile.TemporaryDirectory()` - Creates a real temp dir on disk (e.g. /tmp/...) - Cleans up automatically after the with block, no need to delete manually. Eg: with TemporaryDirectory() as tmpdir: ... do stuff # dir removed here

Oh I have pillow in this env - how so? $ pipdeptree -r -p pillow pillow==10.4.0 └── newspaper3k==0.2.8 [requires: pillow>=3.3.0] Ok, got it! Turns out you can also just use (uv) pip: $ pip show pillow ... Requires: Required-by: newspaper3k #python

Stumbled upon this nice quote today = great reminder as well: "Heroism doesn’t always have to consist of spectacular deeds. Someone who quietly, persistently does what needs to be done in his or her life is also a hero." - Stephen Fry

"The only way to learn a new programming language is by writing programs in it." – Dennis Ritchie No CS degree. Went from Excel macros to #Python 🚀 Code wasn’t that clean at first, but by building a real-world solution I launched my dev career 💡 Build first, polish later! 📈

List vs Generator in Python 🐍💡 List: 835MB, 0.99s Generator: 192B, 0.00s 😲 • Use `sys.getsizeof()` to check memory. • Use generators when you don’t need all values at once. Small change, big difference! 📈 #Python #tips #performance

@Pybites Books v2 is live! 🚀 Simple, fast book tracking that incentivizes you to keep #reading 😎 Gamified, clean design (Tailwind + Htmx 🙏), and loved by users already. 😍 Let’s keep #books alive 💡, especially in this day and age. 📈 Try it → pybitesbooks.com 📚

"In the face of ambiguity, refuse the temptation to guess." 💡 Python prefers clarity over assumptions: • No implicit type coercion • One null: None • Mandatory indentation = no dangling if • Type hints + mypy = catch bugs early >>> import this 🐍 #Python #DevTips #Coding

Elegant API design in #Python libs 🐍 • requests/httpx: no auto errors, you call raise_for_status() → full control • newspaper3k: download(), parse(), nlp() → as needed • pathlib.Path: / operator + chaining methods → clean, OOP fs access Great libs don’t box you in 💡🚀

Subclassing dict or list in Python? Beware! 😱 Some built-in methods bypass your overrides. ✅ Use collections.UserDict & UserList instead! They ensure all operations respect your methods. 🚀 Cleaner, predictable behavior. #Python #tips

💡 You can use a class method to add an alternative constructor to your class. Inspired by `datetime`, the `MyDate` class below lets you create instances from a `date` or a "YYYY-MM-DD" string. 🚀 #Python #tips

"There should be one—and preferably only one—obvious way to do it." - Zen of #Python ✅ enumerate() ✅ Tuple unpacking ✅ F-strings But… 🤔 map() & filter() vs. list comps? 🤔 Walrus := ? 🤔 *args & **kwargs? Where does Python's "obvious way" feel less obvious to you? 💡

🚀 #JavaScript definitely has its good parts 😎 ✅ `const` keyword ✅ `===` for strict type checking ✅ Ternary for clean conditional logic ✅ Template literals (f-strings for JS)

Newest episode is out with @mkennedy.codes and @brianokken.bsky.social ! #423: Traveling the #Python Universe pythonbytes.fm/episodes/sho...

Nothing is truly 'private' in #Python 😅 One of its design philosophies? 'We're all consenting adults.' 💡 Image source: www.reddit.com/r/Programmer...

Have an iterable and need the first element that satisfies a condition? Use a generator expression + the built-in `next`. The generator/`next` combo only searches until you find the element you care about = efficient! If there's no value, `next` errors or you can pass a fallback value to `next`.