It's that time of year when I listen to that really beautiful Tim Minchin song. 💜

In case you're curious what app I use for [insert thing here], here's my default apps of 2025. treyhunner.com/2025/12/defa...

I just published a new article on how whitespace is your friend. 🫶 Well-placed spaces and newlines can really improve the readability of your #Python code.

Worked on this a bunch today to make it substantially faster and published it to Pypi, so you can now try it yourself much easier: ``` uvx llmwalk -p "What is 2+2?" ``` github.com/samwho/llmwalk

"Christmas Tree Farm" - Day 12 - Advent of Code 2025 #AdventOfCode It's the last day. This one looks like it will require a lot of effort and I'm skeptical that I will enjoy myself or learn anything useful (to me) from it. I think I'm giving up. 11 days was good enough. 🤷

I just completed "Reactor" - Day 11 - Advent of Code 2025 #AdventOfCode #Python Both parts ended up being easier than I initially expected... though I spent quite a while chasing my tail on part 2 before realizing I was overcomplicating things. mastodon.social/@treyhunner/...

To check for a prefix or suffix, use the string startswith or endswith methods. Read more 👉 https://trey.io/dley4p #Python

I've completed "Factory" - Day 10 - Advent of Code 2025 #AdventOfCode #Python I almost gave up on part 2 but ended up learning something new instead. It's something I may never need except on silly coding puzzles, but it was a bit interesting. mastodon.social/@treyhunner/...

Decorators are the most common use case for nested functions in Python. Read more 👉 https://trey.io/4u4pj0 #Python

40 years ago (Dec 10, 1985) Carl Sagan testified before the US Congress on climate change.

I just completed "Movie Theater" - Day 9 - Advent of Code 2025 #AdventOfCode #Python Didn't like this one at all. mastodon.social/@treyhunner/...

I just completed "Playground" - Day 8 - Advent of Code 2025 #AdventOfCode #Python I found myself using an interesting number of Python features that I rarerly have an excuse to reach for. mastodon.social/@treyhunner/...

I just completed "Laboratories" - Day 7 - Advent of Code 2025 #AdventOfCode #Python Don't use something like this as an interview question unless combinatorics is a big part of the job. 🤮 mastodon.social/@treyhunner/...

I've completed "Trash Compactor" - Day 6 - Advent of Code 2025 #AdventOfCode #Python mastodon.social/@treyhunner/...

TIL 2 words that (I think?) describe me: 1. sentientist: like humanism without the human-only focus 2. ostrovegan: veganism that allows eating animals that likely can't experience pain Putting a word to an idea has power: it eases communication, but also makes it easier to hold an idea in my head.

PyLadiesCon starts tomorrow! All sessions are online, a mix of pre-recorded talks and workshops. Registration is free: pretix.eu/pyladiescon/... Join my session at 10:50AM about "Red-teaming for LLM-powered apps" and check out the talks from the MSFT databases team on DocumentDB and PostgreSQL.

I just completed "Cafeteria" - Day 5 - Advent of Code 2025 #AdventOfCode #Python Explanation and a link to my solution: mastodon.social/@treyhunner/...

Did you know you can do int(my_string, 0) and Python will parse the string as if it's a literal? Super handy, and I only learned about it five minutes ago!

Hey all! Friendly reminder: the Diversify Tech newsletter is completely free Every week, I share resources to help you grow your tech career. Join here: www.diversifytech.com/join Here's what one of our longtime members had to say: www.linkedin.com/feed/update/...

I've completed "Printing Department" - Day 4 - Advent of Code 2025 #AdventOfCode #Python I was afraid that my part 2 was inefficient at first. It turns out I just had a bug that caused an infinite loop. More commentary: mastodon.social/@treyhunner/...

📢 We are thrilled to present one of the panels at #PyLadiesCon.🐍🎉 Don't miss this opportunity to learn from the best and connect with the #Python community.🐍 🗣️ Language: English Register for PyLadiesCon now:👇 2025.conference.pyladies.com/en/ #PyLadies #PSF

Apparently I'm pretty consistent with what I talk about on Bluesky. 😅 ... also I use that 😅 emoji a lot My most-used words in 2025 were: 1. "python" (360×) 2. "code" (43×) 3. "function" (39×) 4. "pyconus" (36×) 5. "morsels" (35×) See which words you used the most here: anisota.net/harvest

I just completed "Lobby" - Day 3 - Advent of Code 2025 #AdventOfCode #Python My commentary and code is (behind a spoiler) at: mastodon.social/@treyhunner/...

During today's #GivingTuesday, I'd like to share my own thinking around giving. In this thread, I'll ask you to consider: 1. Why might you want to give? 2. What can you give? 3. Where might you give to?

New screencast on wrapping text in #Python pym.dev/wrapping-text/

I just completed "Gift Shop" - Day 2 - Advent of Code 2025 #AdventOfCode #Python I used a Python Morsels exercise to solve this one. See my Mastodon post for spoilers and commentary: mastodon.social/@treyhunner/... adventofcode.com/2025/day/2

Another very common way to avoid issues with default argument values is to avoid using mutable default values. Read more 👉 https://trey.io/rbi1o4 #Python

⏰ FINAL HOURS: Python Morsels Lifetime Access sale ends tonight! One payment for Python learning forever. I won't offer this again anytime soon (maybe ever).

This is the first year I decided to actually attempt Advent of Code. Fortunately, it's also the first year there will only be 12 of them (committing to 25 days always felt like too much). I just completed "Secret Entrance" - Day 1 - Advent of Code 2025 #AdventOfCode

It's very helpful to know what the tools in your toolbox are, when each is helpful, and how to use them. This is true when using an LLM to speed up your work. It's also true in general. Learn your tools! 🧰 It'll pay off.

Many developers have used Python Morsels to level up their skills over the past 8 years. Join them with lifetime access. Sale ends tomorrow.

Black Friday deals from indie tech educators are live on Diversify Tech! Featuring @kulkarniankita.com, @marcysutton.com, @b0rk.jvns.ca, @joshwcomeau.com and more folks Also: Techsgiving Summit 50% off today See the full list here blog.diversifytech.com/black-friday-deals-for-tech-professionals

Does anyone want a survivorship bias shortbread

I've been happily using Kagi as my search engine for a while now. The search results are so much less noisy! If you'd like to try 3 months free, DM me. They're doing a holiday promo where users can share a longer free trial with friends.

I've only offered Python Morsels lifetime access ONCE before in 8 years. If you're considering subscribing, consider lifetime access. Only available through Monday.

What's inside a Python Morsels subscription? 📹 235+ video lessons ✍️ 262+ hands-on exercises 🎯 500+ optional challenges 📚 303+ reference articles 🆕 New content added weekly Get it ALL with lifetime access (ending Monday)

Python Morsels Lifetime Access is here! 🎉 One payment, Python learning forever. No monthly fees, just continual improvement I've only offered this once before. Sale ends on Monday

If you're looking to level-up your #Python skills, checkout my compilation of Python-related Black Friday sales. I've updated the post with all the sales I've seen so far.

There’s a very surreal conversation I keep having on here where people seem unable to hold two ideas at the same time, and I’m not sure why. It’s simply true that the Big AI platforms like ChatGPT are: 1. Extremely bad for society, in many ways. 2. Very genuinely popular with lots of people.

Just 10 minutes a day. That's all it takes to see noticeable progress in your Python skills. Python Morsels makes it happen with personalized weekly routines. Lock in lifetime access before Dec 1st

This is the week of the year (in the US) where "pie hole" is a somewhat suitable term for the mouth. Also our house smells delicious right now. 🥧

Stack Overflow is great for fixing today's bug, but what about the Python knowledge gaps you don't know you have? Python Morsels gives you structured weekly practice to level up systematically, not reactively. Lifetime access is available now through Dec 1st

I am working on a list of Black Friday/Cyber Monday deals for the Diversify Tech newsletter! If you have anything for Software Engineers, Designers and Data professionals, please let me know!

We don't really need those names, but the purpose of those numbers is easier to guess about and much easier to look up when we use variable names. Read more 👉 https://trey.io/nb3z3t #Python

Today’s xkcd made me cry. In a good way. xkcd.com/3172/

Are you a #Python user and a lifelong learner? I've just published my 8th annual list of every Python-related Black Friday / Cyber Monday sale I'm aware of.

Think of Python Morsels as a gym membership for your Python skills. Small amounts of consistent work build up to noticeable progress. It's usually an annual subscription, but you can get lifetime access through Dec 1st.

I needed to see which packages were pulling in six. Two ways: - uv tree --package six --invert → quick “who depends on this?” from uv.lock - uv pip tree --package six --invert --show-version-specifiers → more pipdeptree-style, constraint-aware view from the actual env

I'm announcing the Black Friday sale for Python Morsels a week early this year. Lifetime Access to Python Morsels

You should define dunder methods on your classes in Python, but you shouldn't call dunder methods. Read more 👉 https://trey.io/p0h32w #Python