I'm getting an early start on my personal "list of folks on bsky who will be at @pycon.us this year". If you'll be at #PyConUS and want to run into each other, 👋 reply here (or like or something). If you'll be on Mastodon during PyCon, respond there also/instead: mastodon.social/@treyhunner/...

“Python's if statements don't use parentheses.” Read more 👉 pym.dev/unnecessary-... #Python

Python Tip #94 (of 365): Improve your use of re.findall() with non-capturing groups 🧵 We're modifying our backtick searching regex (tip 93) to work with escaped backticks within backticks, to look for inline code like this: >>> text = "`(`, `)`, and `\\`` are special." #Python #DailyPythonTip

If you're new to your Python journey, I recommend this. PyCon US is big (~2,000 attendees) which might feel intimidating but it's very likely the friendliest tech conference of its size. If you attend, come to the newcomers orientation on Thursday if you can. See you there!

PyCon US 2026 is May 13th to 19th in Long Beach, California. If you've been meaning to learn to program, I'm doing a 3-hour tutorial (additional registration required) for absolute beginners who have never coded before. I hope to see you there! us.pycon.org/2026/

I did not realize I could purchase a PyLadies shirt through my registration ticket this year until I saw this post. It may not have been an option when I signed up or I may have missed it, but it's there now! Check the dashboard page and add your shirt(s)! 👕👕 us.pycon.org/2026/account...

Python Tip #93 (of 365): Mind the greediness of your regular expression quantifiers 🧵 Let's say you're looking for backtick-surrounded code words in text: >>> text = "There's `any()` and `all()`." This won't work well: >>> re.findall(r"`(.*)`", text) ['any()` and `all()'] #Python #DailyPythonTip

“So the next time you use any form of iteration in Python, remember that under the hood, all iteration does the same thing.” Read more 👉 pym.dev/all-iteratio... #Python

Python Tip #92 (of 365): Don't overuse regular expressions 🧵 If a containment check of a common string method will do, don't use a regular expression. #Python #DailyPythonTip

“There is one feature of self-documenting expressions that I really appreciate: you can put spaces around the equal sign to make the result a little bit more readable.” Read more 👉 pym.dev/debugging-wi... #Python

“Iterating over a dictionary object in Python will give you keys, no matter what Python feature you're using to do that iteration.” Read more 👉 pym.dev/all-iteratio... #Python

Python Tip #91 (of 365): Use re.VERBOSE to make your regular expressions more readable 🧵 Regexes are extremely dense: one character is often a whole expression, and they're usually written without whitespace or comments: match = re.‍search(r"^\d{5}(-\d{4})?$", zip_code) #Python #DailyPythonTip

I did better than I expected on this... especially given how infrequently I find myself hand crafting CSS anymore. I got 51/80. www.keithcirkel.co.uk/css-or-bs/?r... #CSSorBS

Python Tip #90 (of 365): Always use raw strings when defining regular expressions 🧵 I recommend this in order to: 1. Avoid warnings about invalid escape sequences 2. Avoid accidentally using a real escape sequence 3. Clarify which strings are regular expressions #Python #DailyPythonTip

We could make this a little bit more readable by splitting our code up over multiple lines (thanks to implicit line continuations), with each line starting with a Boolean operator Read more 👉 https://trey.io/f98u5c #Python

The reversed function only gives us the next item as we need it. Read more 👉 https://trey.io/ur7l4g #Python

Python Tip #89 (of 365): Avoid string methods for number validation 🧵 Avoid the str class's isdigit(), isdecimal(), and isnumeric() methods. Instead use an explicit regular expression or convert the string to a number. #Python #DailyPythonTip

Python Tip #88 (of 365): When assigning multiple variables to the same initial immutable value, use multiple assignment Instead of this: x = 0 y = 0 You can do this: x = y = 0 That's safe as long as the value is immutable (numbers, strings, booleans, or None). #Python #DailyPythonTip

“But classes can sometimes make your code easier to read, and more importantly, when used well, classes can sometimes make code that uses your code easier to read.” Read more 👉 pym.dev/when-are-cla... #Python #classes

Python Tip #87 (of 365): Use tuple unpacking to swap references 🧵 You can use tuple unpacking to swap the values of 2 variables in #Python: x, y = y, x Outside of feeling clever in an interview, you may NEVER need to do that... but you MIGHT need to do something similar. #DailyPythonTip

“Quacking is quacking, and when it comes to iterables, looping is looping.” Read more 👉 pym.dev/all-iteratio... #Python

Python Tip #86 (of 365): Acknowledge that containment is (sort of) a lie. 🧵 Data structures in Python don't contain data... Well, at least data structures don't contain objects. #Python #DailyPythonTip

Python Tip #85 (of 365): Think of variables as pointers. 🧵 When explaining your code in Python, be sure to disambiguate between the 2 types of change (assignments and mutations). #Python #DailyPythonTip

“It's also printing out the programmer-readable representation instead of the human-readable one, which makes it a little bit clearer that answer is currently a string, but it's supposed to be a number.” Read more 👉 pym.dev/debugging-wi... #Python

Python Tip #84 (of 365): Use variables to improve code clarity. 🧵 Today's tip is the inverse of yesterday's tip. Well-named variables CAN make your code more readable and they don't really make your code less efficient (after all, variables are just pointers). #Python #DailyPythonTip

“Any function or class that accepts an iterable can accept a generator expression.” Read more 👉 pym.dev/custom-compr... #Python

Despite the order of the "for" clauses sounding a bit awkward in English, I do sometimes use comprehensions with nested loops. Read more 👉 https://trey.io/aeo9fg #Python

Python Tip #83 (of 365): Don't overuse variables in Python. 🧵 Expressions are valid almost anywhere in Python. If a variable isn't needed to refer to a value multiple times AND the variable isn't clearer than the expression it replaces, just use the expression instead. #Python #DailyPythonTip

🚨litellm was compromised via a supply chain vulnerability. Package releases included a credential stealing script. 1.82.8 - includes a malicious .pth file (litellm_init.pth) 1.82.7 - includes a malicious payload in proxy_server.py github.com/BerriAI/lite...

“But there's another issue that often crops up when splitting text into lines: trailing newlines.” Read more 👉 pym.dev/splitlines/ #Python

Python Tip #82 (of 365): Don't assign 2 variables to the same mutable object. 🧵 An assignment of one variable to another ("x = y") is usually only a good idea for IMMUTABLE VALUES. #Python #DailyPythonTip

A Magritte moment from @davepeck.org during the last talk of #PyCascades on t-strings

“The _ variable (if not deliberately set) will hold the value of the previously run statement, if there is one:” Read more 👉 pym.dev/repl-features/ #Python

Python Tip #81 (of 365): Normalize cases with the string casefold method. 🧵 When normalizing the cases of strings for the sake of a comparison, consider using casefold instead of lower or upper. #Python #DailyPythonTip

#PyCascades: Waffleland Café at 8am tomorrow (Sunday)? 🧇 Reply, message me on Signal (trey.02), or just show up and look for a purple PyCascades shirt. 💜 maps.app.goo.gl/BPW6oeeavrCn...

Last talk of the day, with a nice turtles all the way down Easter egg from @trey.io

Some big ideas in @lukasz.langa.pl's keynote at #PyCascades this morning

Python Tip #80 (of 365): Concatenate iterables with the string join method. 🧵 Instead of this: guests = "" for name in names: if guests: guests += ", " guests += name Do this: guests = ", ".join(names) #Python #DailyPythonTip

“Writing Python code does not require writing classes.” Read more 👉 pym.dev/when-are-cla... #Python #classes

On this week's episode, @digiglean.bsky.social and I talk about standalone Django ORMs, YData, a bit of programming history, and more. With content from: @djangoproject.com @paulox.net @isabelizimm.bsky.social @trey.io @mkennedy.codes and others not on the 🦋

“When I say 'expression' I don't just mean a variable: this works with any Python expression that you could put in an f-string.” Read more 👉 pym.dev/debugging-wi... #Python

Listening to covers of pop music played by a very talented harp player in the San Diego airport while I wait for my flight to Vancouver. 🪉 This is a pretty lovely way to start my trip to #PyCascades. ⛰️ I'm really looking forward to seeing you all soon! 💜

🎤 PyCascades 2026 is happening this week! 🐍 We’re excited to welcome amazing speakers, including: ✨ Mariatta ✨ Hervé Aniglo ✨ Trey Hunner ✨ Stefanie Molin Don’t miss the chance to learn, connect, and be part of the #Python community in Vancouver! 🎟️ Tickets tickets.2026.pycascades.com #PyCascades

Python Tip #79 (of 365): Don't use strip if you just need to remove a single character 🧵 To remove a single trailing newline, instead of using rstrip: line = line.rstrip("\n") Consider using removesuffix: line = line.removesuffix("\n") #Python #DailyPythonTip

Today’s news about OpenAI’s acquisition of Astral can be worrying, or even feel like we may be losing something we’ve come to rely on and trust. #python

Python Tip #78 (of 365): Don't remove string prefixes and suffixes manually. 🧵 Instead of this: normalized = hex_value.lower() if normalized.startswith("0x"): normalized = normalized[2:] Do this: normalized = hex_value.lower().removeprefix("0x") #Python #DailyPythonTip

“When you do make a class, make sure it's a friendly class.” Read more 👉 pym.dev/friendly-cla... #Python

Python Tip #77 (of 365): Need to check for the presence of prefixes or suffixes? Use startswith or endswith. 🧵 Instead of this: test_key = (API_KEY[:5] == "test-") Do this: test_key = API_KEY.startswith("test-") #Python #DailyPythonTip

How do you feel about the word "Pythonic"? I'm running a poll over on Mastodon