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Trey Hunner @trey.io · 1h

🗺️ September 30, 2026 5/5 countries in 6/13 guesses 🟢🟢🟢🟡🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

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Trey Hunner @trey.io · 15h

Python Tip #272 (of 365): Do something or return something, but not both. 🧵 The list sort method returns None: >>> numbers = [4, 2, 7, 1, 5] >>> x = numbers.sort() >>> print(x) None >>> numbers [1, 2, 4, 5, 7] #Python #DailyPythonTip

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Trey Hunner @trey.io · 15h

Python Tip #273 (of 365): Avoid needless wrapper functions. 🧵 This lambda does nothing but call len: sorted(words, key=lambda s: len(s)) So pass len itself: sorted(words, key=len) #Python #DailyPythonTip

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Trey Hunner @trey.io · 20h

“A loop that goes on forever is called an infinite loop.” Read more 👉 pym.dev/while-loops/ #Python

pym.dev

https://pym.dev/while-loops/

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Trey Hunner @trey.io · 21h

🗺️ September 29, 2026 5/5 countries in 7/13 guesses 🟡🟡🟢🟢🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

121

Trey Hunner @trey.io · 29/09/2026

Python Tip #271 (of 365): Return, don't print. 🧵 If your function only seems to "work" in the REPL, it may be printing when it should be RETURNING. #Python #DailyPythonTip

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Trey Hunner @trey.io · 28/09/2026

In early April this year I only knew the location of 2 of these 5 countries. 🗺️ September 28, 2026 5/5 countries in 5/13 guesses 🟢🟢🟢🟢🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

130

Trey Hunner @trey.io · 28/09/2026

Python Tip #270 (of 365): Move and copy files with pathlib. 🧵 In Python 3.14, Path objects gained move and copy methods, and copy works on whole directories: >>> from pathlib import Path >>> taxes = Path("taxes") >>> taxes.copy("taxes-backup") PosixPath('taxes-backup') #Python #DailyPythonTip

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Trey Hunner @trey.io · 27/09/2026

🗺️ September 27, 2026 5/5 countries in 5/13 guesses 🟢🟢🟢🟢🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

120

Trey Hunner @trey.io · 26/09/2026

Python Tip #269 (of 365): Walk directory trees with Path.walk. 🧵 The walk method (Python 3.12+) is the pathlib version of os.walk. For each directory in the tree, you get the directory's path, a list of its subdirectory names, and a list of its file names. #Python #DailyPythonTip

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Trey Hunner @trey.io · 26/09/2026

“When exactly parentheses improve readability is a bit fuzzy and it's definitely subjective.” Read more 👉 pym.dev/unnecessary-... #Python

pym.dev

https://pym.dev/unnecessary-parentheses/

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Trey Hunner @trey.io · 26/09/2026

🗺️ September 26, 2026 5/5 countries in 8/13 guesses 🟡🟢🟠🟢🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

120

Trey Hunner @trey.io · 26/09/2026

Python Tip #268 (of 365): Show relative paths with relative_to. 🧵 Absolute paths are noisy: >>> print(path) /home/trey/taxes/archived/2017/invoices >>> taxes PosixPath('/home/trey/taxes') >>> print(path.relative_to(taxes)) archived/2017/invoices #Python #DailyPythonTip

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Reposted by Trey Hunner

Grace @gracekind.net · 26/09/2026

“Improve model for everyone,” aka “allow my images to be posted on public websites”

“Improve model for everyone” setting in chatgpt

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Trey Hunner @trey.io · 25/09/2026

🗺️ September 25, 2026 5/5 countries in 5/13 guesses 🟢🟢🟢🟢🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

120

Reposted by Trey Hunner

San Diego Python @sandiegopython.org · 24/09/2026

Our monthly meetup is tonight 7pm at @qualcomm.bsky.social in the usual spot. We have a great speaker lineup including @trey.io. See you there or on the livestream. www.meetup.com/pythonsd/eve...

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Trey Hunner @trey.io · 24/09/2026

“If an object quacks like a duck, it may be used as if it's a duck.” Read more 👉 pym.dev/all-iteratio... #Python

pym.dev

https://pym.dev/all-iteration-is-the-same/

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Trey Hunner @trey.io · 24/09/2026

Python Tip #267 (of 365): Change file extensions with with_suffix. 🧵 A ".rst" file path that needs to turn into a ".md" file path: >>> from pathlib import Path >>> old_path = Path("uvrs/readme.rst") >>> old_path.with_suffix(".md") PosixPath('uvrs/readme.md') #Python #DailyPythonTip

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Trey Hunner @trey.io · 24/09/2026

🗺️ September 24, 2026 5/5 countries in 8/13 guesses 🟢🟠🟢🟡🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

120

Trey Hunner @trey.io · 24/09/2026

Keep in mind that because the loops in a comprehension must be in the same order as equivalent for loops, it does read a little funny. Read more 👉 trey.io/aeo9fg #Python

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Trey Hunner @trey.io · 23/09/2026

Python Tip #266 (of 365): Reread a file with seek(0). 🧵 Try to .read() a file twice, and you'll get nothing the second time: >>> f = open("my_file.txt") >>> f‍.read() 'This is my file 👋\nThis is line 2\n' >>> f‍.read() '' #Python #DailyPythonTip

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Trey Hunner @trey.io · 23/09/2026

🗺️ September 23, 2026 5/5 countries in 5/13 guesses 🟢🟢🟢🟢🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

120

Trey Hunner @trey.io · 23/09/2026

“For true randomness, you can use the secrets module, which generates cryptographically secure random numbers.” Read more 👉 pym.dev/random-numbe... #Python

pym.dev

Selecting random values in Python

Python's random module provides utilities for generating pseudorandom numbers. For cryptographically-secure randomness, use the secrets module instead.

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Trey Hunner @trey.io · 22/09/2026

Python Tip #265 (of 365): Use next() to get the first line in a file. 🧵 #Python #DailyPythonTip

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Trey Hunner @trey.io · 22/09/2026

🗺️ September 22, 2026 5/5 countries in 12/13 guesses 🟡🟢🟡🟠🔵 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

130

Trey Hunner @trey.io · 22/09/2026

“To navigate block-by-block, you can use Ctrl+P to go to the previous block and Ctrl+N to go to the next block.” Read more 👉 pym.dev/repl-features/ #Python

pym.dev

https://pym.dev/repl-features/

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Trey Hunner @trey.io · 21/09/2026

Python Tip #264 (of 365): Don't use the file readlines method. 🧵 Do this: lines = list(file) Not this: lines = file.readlines() Both give the same list of lines. So why prefer list? #Python #DailyPythonTip

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Trey Hunner @trey.io · 21/09/2026

🗺️ September 21, 2026 5/5 countries in 7/13 guesses 🟢🟡🟡🟢🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

110

Trey Hunner @trey.io · 20/09/2026

Python Tip #263 (of 365): Parse messy dates with the third-party dateutil library. 🧵 >>> from dateutil.parser import parse >>> parse("September 20, 2026") datetime.datetime(2026, 9, 20, 0, 0) >>> parse("20 Sep 2026 14:30") datetime.datetime(2026, 9, 20, 14, 30) #Python #DailyPythonTip

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Trey Hunner @trey.io · 20/09/2026

🗺️ September 20, 2026 5/5 countries in 5/13 guesses 🟢🟢🟢🟢🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

110

Trey Hunner @trey.io · 19/09/2026

“Pretty much every time I make a temporary file, I need to close the file without actually deleting it so that I can then pass the filename off to other code that actually uses the file.” Read more 👉 pym.dev/temporary-fi... #Python

pym.dev

Creating temporary files in Python

How to create temporary files and directories in Python using the tempfile module's NamedTemporaryFile and TemporaryDirectory.

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Trey Hunner @trey.io · 19/09/2026

Python Tip #262 (of 365): Parse dates with date.strptime. 🧵 In Python 3.14+, the date class got its own strptime class method: >>> import datetime as dt >>> dt.date.strptime("2026-08-19", "%Y-%m-%d") datetime‍.date(2026, 8, 19) #Python #DailyPythonTip

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Trey Hunner @trey.io · 19/09/2026

🗺️ September 19, 2026 5/5 countries in 6/13 guesses 🟢🟢🟡🟢🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

120

Reposted by Trey Hunner

PyBeach @pybeach.bsky.social · 18/09/2026

🐍🏖️ #pybeach2026 Speaker Highlight: Trey Hunner @trey.io "Everything You Don't Need to Know About Classes in Python" 🔗 https:// 2026.pybeach.org/speakers#hunner 📅 October 24th, 2026 🎫 https:// ti.to/pybeach/pybeach2026

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Trey Hunner @trey.io · 19/09/2026

“Of course, at some point in your Python coding journey, you will probably find some opportunities to make classes.” Read more 👉 pym.dev/friendly-cla... #Python

pym.dev

https://pym.dev/friendly-classes/

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Trey Hunner @trey.io · 18/09/2026

Python Tip #261 (of 365): Use Python's zoneinfo module when working with time zones. 🧵 >>> from zoneinfo import ZoneInfo >>> pacific = ZoneInfo("America/Los_Angeles") >>> meeting = datetime(2027, 3, 13, 9, 0, tzinfo=pacific) >>> print(meeting) 2027-03-13 09:00:00-08:00 #Python #DailyPythonTip

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Trey Hunner @trey.io · 18/09/2026

🗺️ September 18, 2026 5/5 countries in 6/13 guesses 🟢🟢🟢🟡🟢 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

120

Trey Hunner @trey.io · 18/09/2026

I got 16/17 on a quiz about Python's datetime module. How many can you get? (And yes I still got one of them wrong despite the fact that I made this quiz and have been testing it for days) www.pythonmorsels.com/quiz/datetime/

pythonmorsels.com

How well do you know Python's datetime module?

Test your knowledge of parsing and formatting dates and times, format codes, and date arithmetic. 17 questions, answers revealed as you go. No account needed.

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Trey Hunner @trey.io · 17/09/2026

Python Tip #260 (of 365): Bookmark a date format cheat sheet. 🧵 Is "%M" month or minute? Is "%H" 12 or 24 hour time? Which one shows a long month name? And a short one? You COULD memorize all of Python's many date/time format codes, but is that worth it? #Python #DailyPythonTip

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Trey Hunner @trey.io · 17/09/2026

🗺️ September 17, 2026 5/5 countries in 6/13 guesses 🟢🟢🟢🟢🟡 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

130

Trey Hunner @trey.io · 17/09/2026

Python Tip #259 (of 365): Use datetime arithmetic and comparisons to check if a date is within a range. 🧵 Sputnik launched before the moon landing: >>> sputnik_launch = datetime(1957, 10, 4) >>> moon_landing = datetime(1969, 7, 20) >>> sputnik_launch < moon_landing True #Python #DailyPythonTip

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Trey Hunner @trey.io · 16/09/2026

Running a #Whereabouts poll on Mastodon. Feel free to to vote over there or reply here if you'd like to let me know what you do/use. I'd love to know. I want to know, do you: 1. Play Whereabouts Daily 2. Use the main Whereabouts learning mode 3. Do both (This is about whereabouts.earth) Thanks!

mastodon.social

Trey Hunner 🐍 (@treyhunner@mastodon.social)

I suspect there are quite a few folks who use the Whereabouts learning mode but don't play the daily game or who play the daily game but don't use it to learn. Do you use Whereabouts.Earth to learn c...

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Trey Hunner @trey.io · 16/09/2026

“The syntax for adding a new key-value pair to a dictionary is actually the same as the syntax for updating the value for an existing key.” Read more 👉 pym.dev/using-dictio... #Python

pym.dev

Using dictionaries in Python

Python's dictionaries act as lookup tables which map keys to their values.

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Trey Hunner @trey.io · 16/09/2026

🗺️ September 16, 2026 5/5 countries in 8/13 guesses 🟢🟢🟢🟢🔵 whereabouts.earth/daily/ #Whereabouts

whereabouts.earth

Whereabouts Daily

How many of today's five countries can you guess?

130

Trey Hunner @trey.io · 16/09/2026

“The last plate that's added to the top of the stack will be the first plate removed from the top of the stack.” Read more 👉 pym.dev/stacks-and-q... #Python

pym.dev

Stacks and queues in Python

Use a Python list for stack operations (last-in, first-out) and a deque from the collections module for queue operations (first-in, first-out).

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Trey Hunner @trey.io · 15/09/2026

Python Tip #258 (of 365): Format dates with f-strings. 🧵 datetime objects support the same format codes in f-string format specifiers that the strftime method uses: >>> deadline = datetime(2046, 10, 31, 15, 46) >>> f"{deadline:%m/%d/%Y %I:%M %p}" '10/31/2046 03:46 PM' #Python #DailyPythonTip

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