Who would expect that my tiny contribution would be merged into Python 🐍 🎉 Be patient folks, there is no rush 🧘 #Python

https://github.com/python/cpython/pull/103625

Last year @yossarian wrote a brief post on the surprising complexity of the #Python "splitlines()" method. As a busy Unicode pedant, it took me a while to write up something explaining *why* it's complex, but here it finally is:

https://www.b-list.org/weblog/2026/aug/10/newlines/

Django moves to an annual release cycle

https://lwn.net/Articles/1088059/

#LWN #Linux #Python

Need more information on running for the inaugural Python Packaging Council? Check out our blog post: https://pyfound.blogspot.com/2026/07/get-ready-python-packaging-council.html

#Python

Need more information on running for the PSF Board? Check out our blog post: https://pyfound.blogspot.com/2026/07/get-ready-psf-board-nominations-opening.html

#Python

You have a little more than 24 hours left to submit a PSF Board or Python Packaging Council nomination for yourself or someone else 🩵🐍💛 Submit your nominations by tomorrow, Tuesday, August 11th, 2:00 pm UTC! #Python
https://www.python.org/nominations/elections/

Python Tip #221 (of 365):

Implement appropriate dunder methods.

Dunder methods are a contract between your class and the Python interpreter.

• __add__ & __radd__ power +
• __eq__ powers ==
• __len__ powers len()

Dunder methods are what third-party library authors use to make their objects feel like NATIVE Python objects.

Django QuerySet objects support indexing, iteration, len(...), and truthiness.

And Pandas DataFrames support a whole BUNCH of syntax.

🧵 (1/2)

#Python #DailyPythonTip

“In addition to os.name and sys.platform, there's an even higher level approach to find the platform that your code is running on, with the platform module.”

Read more 👉 https://pym.dev/operating-system-checks/

#Python

h is for htmx

A short teaser for htmx for those who don't yet know it exists. I plan to write more in-depth posts about it when I'm not in a daily post grind like with Blaugust but wanted to give a shoutout to it anyway.

For the past couple of years, all my new Django projects are built with htmx and it's one of my favourite tools in my toolbox these days.

https://hamatti.org/posts/h-is-for-htmx-python-a-to-z/

#Python #Blaugust #Blaugust2026

Python Tip #220 (of 365):

Trying quack like a duck? Seek help.

When implementing a common Python protocol (a sequence, a mapping, etc.), inherit from the matching abstract base class (ABC):

from collections.abc import MutableSequence

class MyCustomList(MutableSequence):
...

Benefits:

1. isinstance & issubclass checks work well (i.e. isinstance(x, Sequence))

2. Python will complain LOUDLY if you forget to implement a required method for the protocol

🧵 (1/3)

#Python #DailyPythonTip

✍️ I just released a new version of my little Python profiler, tprof, with less overhead for more accurate results.

https://adamj.eu/tech/2026/08/08/python-tprof-performance/

#Python

“As you write your code, pause and ask: “what should stand out here at a glance?””

Read more 👉 https://pym.dev/embrace-whitespace/

#Python

RE: https://mastodon.social/@djangonews/117044723592407007

New Django just dropped! 🙌🏻 🚀

I’m happy to see an implementation of one of my accessibility feature requests in there as well: `django.db.models.fields.BLANK_CHOICE_LABEL`.

I don’t have the spoons to explain it right now, but the backstory is in the ticket.

#Python #Django

Paolo Melchiorre boosted

Django News » 🤖 🌐 2026-08-05
@djangonews@mastodon.social

Django 6.1 released https://www.djangoproject.com/weblog/2026/aug/05/django-61-released/

Thoughts? https://github.com/django/new-features/issues/199

#Django #python #openSource

New article on goose typing in Python (yes, that's actually a thing).

You can duck typing WHILE type checking.

https://pym.dev/goose-typing

#Python

Python Tip #219 (of 365):

Validate your ducks with goose typing.

You can use isinstance() WHILE duck typing. This is called goose typing (coined by Alex Martelli).

>>> from collections‍.abc import Iterable
>>> isinstance([1, 2, 3], Iterable)
True

Point doesn't inherit from Iterable:

class Point:
def __init__(self, x, y): self.x, self.y = x, y
def __iter__(self): yield from (self.x, self.y)

And yet...

>>> isinstance(Point(1, 2), Iterable)
True

🧵 (1/3)

#Python #DailyPythonTip

🎨 I’m really enjoying the redesigned PyPI project pages. Thanks to Nicole Harris and team for making these improvements!

Blog post:

https://blog.pypi.org/posts/2026-07-22-ui-updates/

#Python

Alt...

Django’s project page on PyPI, showcasing the new design.

@mgorny The good news is that was merged in 2024 but never actually released, so this change only affects those using unreleased source directly? And it's been archived on PyPI, so perhaps find a replacement.
#Python #flit

Today in things that couldn't have aged well:

"Unpin flit-core dependency" 2 years ago without actually updating the metadata to use the newer pyproject.toml format.

https://github.com/sethmlarson/socksio/commit/b326406915fd98a8185c1c160165c5b8963b30c1

#Python #flit

Python Tip #218 (of 365):

Don't needlessly convert between data types.

Looping over a file once? There's no reason to convert it to a list first:

for line in my_file:
print(line, end="")

Another example: if you're looping over a set, there's no reason to convert it to a list either:

>>> colors = {'red', 'blue', 'yellow'}
>>> for color in colors:
... print(color)
...
red
yellow
blue

"for" loops don't need a list. They accept ANY iterable.

🧵 (1/2)

#Python #DailyPythonTip

🆙 Updated my post on unittest base test cases with a new preferred technique: using a plain class as a container.

https://adamj.eu/tech/2025/05/30/python-unittest-common-tests/

#Python #unittest

Python 3.15.0 release candidate 1 is out!

https://www.python.org/downloads/release/python-3150rc1/

Test your code against it and let the core devs know if you find bugs!

If you have uv, getting it is easy:

uv self update
uv python install

That even works if you already have an alpha or beta version installed (it'll upgrade it for you).

#Python

RE: https://fosstodon.org/@ThePSF/117044410884871074

For #Python devs who like to fill out surveys... ✅

Python Software Foundation boosted

Python Software Foundation » 🌐 2026-08-05
@ThePSF@fosstodon.org

The 2026 Python Type System & Tooling Survey is live 🐍📝❓ No typing experience needed—your perspective as a #Python dev matters most. Take a couple minutes to help improve Python typing for all!

https://www.surveymonkey.com/r/python_typing

This survey was developed with support from the Pyrefly team at Meta, the PyCharm team at JetBrains, the Python team at Microsoft, and the typing community on discourse.python.org.

The 2026 Python Type System & Tooling Survey is live 🐍📝❓ No typing experience needed—your perspective as a #Python dev matters most. Take a couple minutes to help improve Python typing for all!

https://www.surveymonkey.com/r/python_typing

This survey was developed with support from the Pyrefly team at Meta, the PyCharm team at JetBrains, the Python team at Microsoft, and the typing community on discourse.python.org.

Python Tip #217 (of 365):

Think in terms of the minimum viable duck.

In other words: "what's the least this object needs to do to work in this context?"

For example, csv.reader is usually given a file object... but it accepts ANY iterable of delimited lines:

>>> import csv
>>> rows = ['a,b,c', '1,2,3']
>>> list(csv.reader(rows))
[['a', 'b', 'c'], ['1', '2', '3']]

🧵 (1/4)

#Python #DailyPythonTip

🐍🐍🚀🚀 Out now: Python 3.14.7 and 3.13.15!

https://discuss.python.org/t/python-3-14-7-and-3-13-15-are-now-available/108420

#Python #Python314 #Python313 #release

Peter's PEP 797 – Shared Object Proxies was also the first PEP rejected for 3.16 as well! ✌️
https://peps.python.org/pep-0797/
#Python #Python316 #PEP797

Forget Python 3.15 (don't forget it, please test!), the first PEP for Python 3.16 has been accepted:

PEP 828 – Supporting ‘yield from’ in asynchronous generators, by Peter Bierma

https://peps.python.org/pep-0828/
#Python #Python316 #PEP828

Me after laboriously backporting #Python 3.15 fixes to #Django 6.0.x in #Gentoo: "oh, nice, the patchset applies cleanly to 5.2.x as well."

And today, I have to laboriously backport another patch to 6.0.x, and it turns out the backport doesn't apply cleanly to 5.2.x, so I have to laboriously backport it there as well.

I honestly *hate* Django Python version support policy. Shifting all the burden downstream.

TIL that #Python's `pathlib.Path` is expensive compared to plain `str`ings. I tested by `.walk()`ing a 2 level directory structure with 40M files and it took 9m. When I tried with `os.walk()`, it only took 1m. Of course, I tested this several times to avoid cold vs hot cache.

Tritium#python@libera.chat tracked it down to the constructor to `pathlib.Path`, which does a lot of things than being just a `str`:

https://github.com/python/cpython/blob/83b33546b9c68578dda7733d1ef8816473981b7e/Lib/pathlib/__init__.py#L138

my keynote from europython is online!

https://youtu.be/wMPe_KepOjc

#python #europython

Python Tip #216 (of 365):

In Python, we often care more about the behavior of an object than its type.

We say "if it looks like a duck and quacks like a duck, it's a duck".

When we check for duckness, we don't test DNA, we observe behavior.

Instead of asking "what TYPE can I use here?", ask "does my object have the BEHAVIOR that's expected here?"

🧵 (1/3)

#Python #DailyPythonTip

Some things sooner than others:

3.15 RC 1 is out, but we'll wait until tomorrow to do 3.13 and 3.14 so we can include this fix for macOS that will become a problem in mid-September:

https://github.com/python/cpython/issues/153711

3.15 will have another release (1st Sept) before then, but 3.13 and 3.14's next one is in October, so better wait for the fix.

#Python #Python315 #Python314 #Python313 #release

🐍🚀 Out now: Python 3.15 release candidate 1!

Please test and report bugs!

We strongly encourage maintainers of to prepare their projects for 3.15 during this phase, and publish Python 3.15 wheels on PyPI to be ready for the final release of 3.15.0, and to help other projects do their own testing.

Any binary wheels built against Python 3.15.0 release candidates will work with future versions of Python 3.15.

https://discuss.python.org/t/python-3-15-0-release-candidate-1-is-here/108395?u=hugovk

#Python #Python315 #release

The nomination period for the PSF Board and Python Packaging Council elections is open now, closing next Tuesday, August 11th, 2:00 pm UTC 📝🐍 Don't wait until the last minute, though! Nominate yourself or someone else today: https://www.python.org/nominations/elections/ #Python

🔒🐍 Coming soon, Python 3.15 release candidate 1! The 3.15 branch is now locked until 3.15.0 final in October.
https://discuss.python.org/t/the-3-15-branch-is-locked-for-rc1/108389

Also coming soon: Python 3.13.15 and 3.14.7.
https://hugovk.dev/next-release/
#Python #Python315 #Python314 #Python314 #release

Jag har också en kurs som hjälper Scratch-generationen att ta steget över till #Python genom den välbekanta miljön. Kursen innehåller även grundläggande hårdvaruprogrammering för att göra inlärningen rolig. Kurserna startar i slutet av augusti. Dela gärna så att fler föräldrar får se detta. #Stockholm #Solna #Sverige

https://enkelkod.se/beginner.html

Python Tip #215 (of 365):

Know what it means to be a "sequence" in Python.

Lists, strings, and tuples are all sequences:

>>> fruits = ["apple", "lemon", "pear"]
>>> coordinates = (1, 8, 2)
>>> greeting = "Hi y'all!"

A sequence is an ordered collection that:

1. Has a length
2. Can be indexed from "0" up to one less than its length
3. Can be looped over

>>> len(fruits)
3
>>> fruits[0]
'apple'
>>> for c in coordinates: print(c)
1
8
2

🧵 (1/3)

#Python #DailyPythonTip

“The defaultdict is very handy, but I find that it's rarely useful enough that I feel the need to use it.”

Read more 👉 https://pym.dev/default-dictionary-values/

#Python

✍️ New post demonstrating the runtime advantage of my package time-machine over its inspiration, freezegun.

https://adamj.eu/tech/2026/08/03/python-time-machine-o1-freezegun-on/

#Python

B is for batteries included

Python comes with batteries included — meaning it has a fantastic, powerful standard library. Two years ago, I spent an entire August writing about my favourite parts of it.

https://hamatti.org/posts/b-is-for-batteries-included-python-a-to-z/

#Python #Blaugust #Blaugust2026 #Blogging

A is for assert

assert is handy built-in in Python that can be used as a failsafe for scripts and for writing tests with pytest.

https://hamatti.org/posts/a-is-for-assert-python-a-to-z/

#Python #Blaugust #Blaugust2026

✍️ time-machine 3.3.0 is out, with Python 3.15 support, performance improvements, subinterpreter support, and various bug fixes.

Check it out, and if you’re using freezegun, try the updated Migration CLI to convert and speed up your tests.

https://adamj.eu/tech/2026/07/31/python-time-machine-3.3.0/

#Python

RE: https://fosstodon.org/@adamchainz/117017044548701755

"Wheels are also now built with frame pointers enabled, per the PEP 831 change in Python 3.15. Frame pointers are a debugging feature for low-level languages like C, which allow debuggers to reconstruct the call stack of a program. Python has decided to enable frame pointers by default and encourage the ecosystem to do so as well, to make debugging easier for us all, so time-machine is joining the party."

Enabled by default for 3.15, do this for older versions:

https://github.com/adamchainz/time-machine/pull/627

#Python

pvergain (framapiaf) boosted

Adam Johnson » 🌐 2026-07-31
@adamchainz@fosstodon.org

✍️ time-machine 3.3.0 is out, with Python 3.15 support, performance improvements, subinterpreter support, and various bug fixes.

Check it out, and if you’re using freezegun, try the updated Migration CLI to convert and speed up your tests.

https://adamj.eu/tech/2026/07/31/python-time-machine-3.3.0/

#Python

Python Tip #214 (of 365):

Use truthiness for integers with caution.

I DO rely on truthiness checks for integers, but not always. I would recommend only using them when they seem to improve readability.

I find this:
if hours: ...

More readable than this:
if hours > 0: ...

But I find this:
if number % 2 != 0: ...

More readable than this:
if number % 2: ...

🧵 (1/2)

#Python #DailyPythonTip

The German translation of the Python docs is being restarted. Want to help out? Get in touch with Swen!

https://discuss.python.org/t/starting-work-on-the-german-documentation-translation-python-docs-de/108369

#Python #docs #translation #German

Plot a 3D sphere with #Python

#!/usr/bin/python3
import numpy as np
import matplotlib.pyplot as plt
theta, phi = np.linspace(0, 2 * np.pi, 50), np.linspace(0, np.pi, 20)
THETA, PHI = np.meshgrid(theta, phi)
R = 1.0
X = R * np.sin(PHI) * np.cos(THETA)
Y = R * np.sin(PHI) * np.sin(THETA)
Z = R * np.cos(PHI)
fig = plt.figure()
ax = fig.add_subplot(1,1,1, projection='3d')
plot = ax.plot_wireframe(X, Y, Z, rstride=1, cstride=1, linewidth=.1, color='red', antialiased=False, alpha=1)
plt.show()

🚀 I just released rst2gemtext v0.7.0!

It is a #Python library and a CLI tool to convert reStructuredText to Gemtext (Gemini markup format).

➡️ https://github.com/flozz/rst2gemtext/releases/tag/v0.7.0

This version adds support for the Docutils' csv-table and list-table directives. Thank you @Dryusdan to make me know about them! 😁

📰 New GitHub, PyPI Policies Hope to Boost Supply Chain Security

"GitHub and the Python Package Index (PyPI) have introduced new policies meant to boost supply chain security," reports SecurityWeek, "by preventing the fast propagation of poisoned package version...

📰 Source: Slashdot
🔗 Link: https://developers.slashdot.org/story/26/08/01/0511237/new-github-pypi-policies-hope-to-boost-supply-chain-security?utm_source=rss1.0mainlinkanon&utm_medium=feed

#Python #AI #ArtificialIntelligence

Oh look, a new version of Delorean, the datetime enhancement library, has been released after just eight years:
https://github.com/myusuf3/delorean/issues/104 🚀🕒
#Python

Python Tip #213 (of 365):

Replace "or"-chained equality comparisons with a containment check.

Instead of this:

is_vowel = c == "a" or c == "e" or c == "i" or c == "o" or c == "u"

You can write this:

is_vowel = c in ("a", "e", "i", "o", "u")

In fact, you could even give that tuple a name:

vowels = ("a", "e", "i", "o", "u")
is_vowel = c in vowels

🧵 (1/2)

#Python #DailyPythonTip

PegaProx for #Proxmox VE and #XCPng clusters made a huge step and is finally out of beta!

The first stable release also comes around with companies providing enterprise support. If you need SLA-backed help running PegaProx in production (or training sessions) you can now find a support partner at:

Enterprise Support & Sponsors: https://pegaprox.com/sponsors.html
Release: https://github.com/PegaProx/project-pegaprox/releases/tag/v1.0
Website: https://pegaprox.com

#homelab #virtualization #opensource #community #python #virtualization #enterprise #business #support

Alt...

PegaProx v1.0 Release

“In order to use a for loop, you must have an iterable to loop over.”

Read more 👉 https://pym.dev/while-loops/

#Python

"Or we could use the zip function with the strict=True argument to compare line-by-line in a for loop"

Read more 👉 https://trey.io/0frqkp

#Python

✍️ time-machine 3.3.0 is out, with Python 3.15 support, performance improvements, subinterpreter support, and various bug fixes.

Check it out, and if you’re using freezegun, try the updated Migration CLI to convert and speed up your tests.

https://adamj.eu/tech/2026/07/31/python-time-machine-3.3.0/

#Python

Python Tip #212 (of 365):

Use any() and all() to check a condition across every item in an iterable

This:

any_negative = False
for n in numbers:
if n < 0:
any_negative = True
break

Can be replaced with:

any_negative = any(n < 0 for n in numbers)

And this:

all_good = True
for item in iterable:
if not condition(item):
all_good = False
break

Can be replaced with:

all_good = all(condition(item) for item in iterable)

🧵 (1/2)

#Python #DailyPythonTip

Alt...

all_good = True for item in iterable: if not condition(item): all_good = False break Can be rewritten as: all_good = all( condition(item) for item in iterable ) Also... any_good = False for item in iterable: if condition(item): any_good = True break Can be rewritten as: any_good = any( condition(item) for item in iterable )

Did you know that map()/filter() were added to Python 6 years before comprehensions?

Also range() was added 9 years before zip() which was added 3 years before enumerate().

And strings methods weren't methods for the first 9 years... they lived in the string module!

For years I've wanted an easier way to look up facts like those.

Now I have a way! https://pym.dev/since

It's also available as a CLI tool via PyPI

uvx sincewhen 'sum()'

#Python #programming

🐍🚀 Out now: Tablib 3.10.0

The format-agnostic tabular dataset library

🔒 Security fix to escape dataset title in HTML serialisation
🦥 Support for Python 3.15 with lazy imports
💧 Drop support for EOL Python 3.9
🩹 And a bunch of fixes

https://github.com/jazzband/tablib/releases/tag/v3.10.0
#Python #Tablib #release #security #Python315

Thinking about nominating yourself or someone else for the upcoming PSF Board or Python Packaging Council elections? Now's your chance: take a couple minutes this weekend to submit a nomination! #Python
https://www.python.org/nominations/elections/

📰 Issue 348: One month until DjangoCon US

https://django-news.com/archive/issue-348-one-month-until-djangocon-us/

#Python #Django #DjangoNews

Using super()[key] won't work because the super class doesn't implement a __getitem__ method, but looking up the __getitem__ attribute on a super() object does work (assuming a parent class implements that method).

Read more 👉 https://trey.io/p0h32w

#Python

Great, now the AI is throwing malware into python libraries, too.

Anthropic's Claude breached 3 orgs, uploaded PyPI malware during tests

https://www.bleepingcomputer.com/news/security/anthropics-claude-breached-3-orgs-uploaded-pypi-malware-during-tests/

#python #cybersecurity #aipocalypse

Python Tip #211 (of 365):

Consider how your Boolean expressions read in English

For example, you could write "10 > x" or you could write "x < 10".

They check the same thing, but I find the latter one more readable.

Steve McConnell's Code Complete recommends writing numeric tests in "number-line order": order the values left to right, from smallest to largest.

Follow that rule and you'll always use < and <=, never > and >=.

I don't follow that advice...

🧵 (1/3)

#Python #DailyPythonTip

What's New in Python 3.15:

csv

* csv.Sniffer.sniff() delimiter detection is now up to 1.6x faster. (Contributed by Maurycy Pawłowski-Wieroński.)

https://docs.python.org/3.15/whatsnew/3.15.html#csv

#Python #Python315 #WhatsNew

Zero days since #pip added a random new functionality that depends on pip being entirely standalone and breaks when you unbundle the dependencies. And I'm unable to figure out why a bunch of tests are still failing.

EDIT: I'd appreciate some help with that. My WIP is at https://codeberg.org/gentoo/gentoo/pulls/1578.

#Gentoo #Python

Finding an item in a sorted list of 10 million things:

✅ Binary search: 23 comparisons
❌ The `in` operator: 2+ million comparisons

Python's bisect module does binary search for you. New article, with recipes for closest-match and range lookups:

https://pym.dev/binary-search/

#Python

JOB : nous recrutons un développeur / une développeuse backend.

Découvrez le poste et les compétences requises, ainsi que les avantages à travailler chez Dalibo : télétravail, coopérative, grille salariale transparente… => https://blog.dalibo.com/2026/07/30/dev_backend.html

#emploi #jerecrute
#développeur #backend
#linux #python #golang #rust
#fullremote
#bienDansMaScop

Alt...

visuel promo du recrutement chez Dalibo

The Python Software Foundation is hiring a Security Developer to join @miketheman and I on triaging vulnerability reports and mitigating malware published to PyPI.

If you've got experience with Python, security, and collaborating with open source projects then we'd love to hear from you:

https://jobs.pyfound.org/apply/ei03ut60y4/Security-Developer?referrer=20260730140256DSN5BCNCWZA5MXAO

#python #security #pypi #supplychain #vulnerability

Lots of new stuff in pip 26.2:

🍊 Support for Python 3.15
🍊 Selecting only dependencies
🍊 Experimental: venv based build isolation
🍊 Faster repeated resolves by caching index simple responses
🍊 No more progress bar spam in CI
🍊 Deprecation to remove the legacy dependency resolver (--use-deprecated=legacy-resolver)

See @ichard26's post for more!

https://sichard.ca/blog/2026/07/whats-new-in-pip-26.2/
#Python #pip

For checking whether any items match a more complex condition, we could use the built-in any() or all functions

Read more 👉 https://trey.io/xtql6h

#Python

Python Tip #210 (of 365):

Instead of an "if" under an "else", consider using "elif".

You likely know about Python's "elif" statement, but you might occasionally underuse it.

If you find yourself writing an "if" statement just under an "else", ask "should I use an "elif" here instead?"

🧵 (1/3)

#Python #DailyPythonTip

xy is very fast and customizable charting library for Python https://lobste.rs/s/vnfk4x #python
https://github.com/reflex-dev/xy

New Python Morsels article: Binary search with the bisect module 🔍

You don't need to implement binary search yourself. Python's bisect module already did it for you.

In this article:

🎯 An interactive guessing game that demonstrates binary search
⚡ Why 10 million items take just 23 comparisons
🤔 Why a set or dict can't always replace binary search
🧰 Recipes: closest match, first/last match, all values in a range

https://pym.dev/binary-search/

#Python

What's New in Python 3.15:

contextlib

* Added support for arbitrary descriptors __enter__(), __exit__(), __aenter__(), and __aexit__() in ExitStack and contextlib.AsyncExitStack, for consistency with the `with` and `async with` statements.

* ContextDecorator and AsyncContextDecorator now detect generator functions, coroutine functions, and asynchronous generator functions and keep the context manager open across iteration or await.

https://docs.python.org/3.15/whatsnew/3.15.html#contextlib

#Python #Python315 #WhatsNew

I've recently been updating many of my mini #Python helper apps and I made a page for them: https://www.pythonmorsels.com/tools/

Note that the strptime & format tools now link to CLI versions (strptime-cli & fguess) and the pastebin & REPL tool recently got a big rework.

Have thoughts on one of these tools? Or an idea for another one? I'd love to hear either!

Python Tip #209 (of 365):

Remember Python's "inline ifs"

Python doesn't have traditional ternary operators (cond ? one : two) but instead has an inline "if" expression (technically a "conditional expression") for the same purpose.

Instead of:

if amount == 1:
noun = "item"
else:
noun = "items"

We can write

noun = "item" if amount == 1 else "items"

The condition is in the MIDDLE. The first value is the "true" case and the last is the "false" case.

🧵 (1/2)

#Python #DailyPythonTip

Usually a quick chore, but with the #ruff feature update, an unexpected ton of work…

#django #python #precommit

🪟🦾🥈 Windows on Arm (aka aarch64-pc-windows-msvc) has now been promoted to tier 2 of CPython platform support.

Tier 3 has no response SLA to failures. Tier 2 requires breaking changes to be fixed or reverted within 24 hours, and failures block a release.

Tier 3 requires at least one core team member signed up to support the platform. Tier 2 requires at least two, and we have three here.

https://peps.python.org/pep-0011/
#Python #CPython #PEP11 #WindowsOnArm #Windows

Python Tip #208 (of 365):

Break up long boolean expressions

Have a long condition in your "if" statement?

You could:

1. Wrap it in parentheses to break it up over multiple lines
2. Use variables to give names to each sub-expression
3. Use functions to name sub-expressions

🧵 (1/4)

#Python #DailyPythonTip

✍️ New post on a Python testing technique: inspecting interleaved calls across multiple mocks with attached mocks.

#Python

https://adamj.eu/tech/2026/07/27/python-mock-attach-mock/

“Sets are also great when you need fast containment checks.”

Read more 👉 https://pym.dev/practical-uses-of-sets/

#Python

Some #programminglanguages remain widely used for decades, while others fulfill an important role during their time before receding.

Our author Andrew Oram explores the stories of C, C++, C#, #Java, #JavaScript, #PHP, #Rust, #Perl, #COBOL, #FORTRAN, #BASIC and others. Dive into it 👇
https://lpi.org/xq3f

#LPI #programming #opensource #linux #unix #softwaredevelopment #coding #developers #sysadmins #python #softwareengineering

@bearstech
Une suggestion pour de jolies TUI en Python ?

#Python #TUI

Please congratulate our newest PSF Fellow Members for Q2, 2026! Their continued contributions to the Python ecosystem are so very important to our community. #python
https://pyfound.blogspot.com/2026/07/announcing-python-software-foundation.html

https://wsvincent.com/deploying-web-apps-in-2026/ (Deploying Web Apps in 2026: My EuroPython 2026 Conference Talk by Will Vincent )

--<--
This is the text version of my EuroPython talk, Deploying Python Web Apps in 2026, which I recently presented in Krakow, Poland.

I will add the video version when it it is ready in a few weeks. The EuroPython team traditionally does an amazing job making the talks available shortly after the conference.
-->--

#Web #Python #Deployment

The PSF is hiring a Security Developer! Help triage vulnerabilities in CPython, fight malware/supply-chain attacks on PyPI, and build tools to keep the #Python ecosystem safe for millions of users 🐍🔒 This is a global, remote, 1 year term role, with the possibility of renewal. #Security

Apply today:
https://pythonsoftwarefoundation.applytojob.com/apply/ei03ut60y4/Security-Developer

I did not realise I had strong feelings on docstrings. I use them sparingly, and while they are a hack, at least they serve a good purpose.

I know people have opinions on the placement of line breaks and quotes, but I thought I was above these things. That this was Python programmers yearning for curly-brace level style wars.

I was mistaken.

I just encountered docstrings written in regular quotes rather than triple quotes and, no, apparently I DO have strong feelings on docstrings.

#python

Python Tip #207 (of 365):

Get fancy with your subprocess‍.run calls.

When launching a subprocess, consider passing the keyword arguments capture_output, text, and check to subprocess‍.run.

Passing capture_output=True will capture both stdout & stderr from the subprocess.

Passing text=True will decode the captured output into strings (instead of providing raw bytes).

Passing check=True will raise an exception if the subprocess exited with an error code.

🧵 (1/2)

#Python #DailyPythonTip

Now we have pymanager for Windows, Python 3.16 drops the old MSI-based installer.

Here's Steve Dower's +389 -17,781 PR! 🧹

https://github.com/python/cpython/pull/153512

https://peps.python.org/pep-0773/
#Python #Python316 #pymanager #PEP773

Because someone in the #Python Discord was asking about structuring tests alongside their project code, I added a bit of test structure to my pkgsample explainer: https://github.com/nedbat/pkgsample

The next PyPy will be 8.0.0 and should add support for Python 3.12 and be the last to support 3.11, and require glibc 2.28 (AlmaLinux8, Amazon Linux 2023, Debian 10, Ubuntu 20.04).

https://pypy.org/posts/2026/07/moving-linux-builds-to-glibc228.html

#Python #PyPy

Python Tip #206 (of 365):

Know your combination and permutation tools in Python.

Python ships with tools for combinations, permutations, and random selections.

The itertools module includes various combinatorics-oriented utilities:

from itertools import combinations, combinations_with_replacement, permutations, product

This joins tuples of characters into a comma-separated string:

def join(groups):
return ", ".join("".join(g) for g in groups)

🧵 (1/5)

#Python #DailyPythonTip

✍️ New post on using unittest.mock to spy on function calls. 🕵️‍♂️

I recently learned how to use the wraps argument to track all calls to a target function for later assertions. Very useful for testing things like “is caching working?” without having to mock the function completely.

#Python

https://adamj.eu/tech/2026/07/25/python-spy-unittest-mock-wraps/

“So if you find this feature jarring enough that you'd like to never use it in your code, you can probably configure your linter to disallow it entirely.”

Read more 👉 https://pym.dev/implicit-string-concatenation/

#Python

✍️ Django’s release code words, up to the pending Django 6.1 “mélange”.

https://adamj.eu/tech/2026/07/24/django-release-code-words-6.1/

#Python #Django

📰 Issue 347: Django 6.1 release candidate 1 released

https://django-news.com/archive/issue-347-django-61-release-candidate-1-released/

#Python #Django #DjangoNews

“Python's print function is usually one of the first built-in functions that new Pythonistas learn about, but many Python programmers don't realize how versatile the print function is.”

Read more 👉 https://pym.dev/print-features/

#Python

Python Tip #205 (of 365):

Use statistics.multimode to get the most common items.

To get the most common items in an iterable, you might be tempted to use collections.Counter. Consider using statistics.multimode instead.

Compare this:

counts = collections.Counter(items)
[(_, top_count)] = counts.most_common(1)
commonest = [
item
for item, count in counts.items()
if count == top_count
]

To this:

commonest = statistics.multimode(items)

Simpler, right?

#Python #DailyPythonTip

🐍🚀 Out now: em-keyboard 5.4.0

An emoji search CLI.

Adds support for Python 3.15 and Unicode 17.0:

❯ em "distorted face" "fight cloud" "hairy creature" "ballet dancer" "orca" "landslide" "trombone" "treasure chest"
Copied! 🫪 🫯 🫈 🧑‍🩰 🫍 🛘 🪊 🪎

Your device might not support them yet 🫠

https://blog.emojipedia.org/whats-new-in-unicode-17-0/
#Python #release #em #emoji

🐍🚀 Out now: flake8-implicit-str-concat 0.7.0

A Flake8 plugin to encourage string literal concatenation. It can help tidy up after Black/Ruff.

This release adds a new ISC004 rule: "unparenthesized implicit string concatenation in collection". See examples in the README.

Also support Python 3.15 and use PEP 639 licence expression and remove deprecated Trove classifier.

https://github.com/flake8-implicit-str-concat/flake8-implicit-str-concat/releases
#Python #release

The Python Morsels pastebin & REPL pages recently got some BIG updates.

pastebin: https://pym.dev/paste
REPL: https://pym.dev/repl

Some of the many new things you can do with the pastebin and REPL that you couldn't before:

• Run a paste before even saving it
• Add additional files to a paste
• Pass command-line arguments
• Run pastes in interactive mode
• Edit a paste after you've created it
• Drop into PDB to debug tracebacks
• Open a paste within the Python REPL

#Python #WebAssembly

“How can you check which operating system your Python code is running on?”

Read more 👉 https://pym.dev/operating-system-checks/

#Python

Python Tip #204 (of 365):

Generate unique identifiers with the uuid module

>>> import uuid
>>> uid = uuid.uuid4()
>>> uid
UUID('922a6cea-c3e9-473d-bf88-efb10793c931')
>>> str(uid)
'922a6cea-c3e9-473d-bf88-efb10793c931'

UUID stands for universally unique identifiers.

The uuid module has functions for UUID version 1, 3, 4, 5, 6, 7, and 8 from RFC 4122/9562.

Versions 7 and 8 were added in Python 3.14.

🧵 (1/2)

#Python #DailyPythonTip

You can be a part of kickstarting the brand new Python Packaging Council ✨🐍📦 Nominate yourself or someone else for the council for the inaugural election! Nominations open Tuesday, July 28th, 2:00 pm UTC and close Tuesday, August 11th, 2:00 pm UTC. #python
https://pyfound.blogspot.com/2026/07/get-ready-python-packaging-council.html

@ffeth sinon, il y a #python-fr sur IRC <3

Hmm, I got a question on #Python, specifically #mypy.

I just coded a very short module with dynamically generated functions that I export, and mypy complains when I use these functions, because they're not in the module?! What am I doing wrong?

code:

import sys
from functools import partial
__cur_mod = sys.modules[__name__]
_COLORS: dict[str, str] = {
"grey":'\x1b[38;21m',
[...]
}
for color in _COLORS:
setattr(__cur_mod, color, partial(color_generic, color))
__all__ = list(_COLORS)

You can be a part of guiding the future direction of the PSF 🩵🐍💛 Nominate yourself or someone else for the PSF Board for the 2026 election! Nominations open Tuesday, July 28th, 2:00 pm UTC and close Tuesday, August 11th, 2:00 pm UTC. #python
https://pyfound.blogspot.com/2026/07/get-ready-psf-board-nominations-opening.html

✍️ Introducing django-crawl, a tool for crawling your local Django site, useful for quickly finding what’s broken or performing site-wide checks.

https://adamj.eu/tech/2026/07/22/introducing-django-crawl/

#Django #Python

Lyon: C’est l’été !, Le jeudi 30 juillet 2026 de 18h00 à 21h00. https://www.agendadulibre.org/events/35507 #lyon #python #rencontre #discussion

#introduction #introductionfr

Bonjour,
Comment me présenter rapidement ?
un côté #geek : #logicielslibres #wikipedia #wikidata #python

j'ai exercé longtemps dans la #MédiationScientifique : #pédagogie #sciences

je suis en #IledeFrance, en #transportencommun

Politiquement à #Gauche, dans le milieu de défense des droits #LGBTQIA+, #ecolo

loisirs : #bd #MusiqueFrançaise

“Some blank lines improve readability, but not all blank lines do.”

Read more 👉 https://pym.dev/embrace-whitespace/

#Python

Python Tip #203 (of 365):

When you need precise decimal numbers, use decimal.Decimal

Floating point numbers have precision gotchas.

For example, 0.1 + 0.02 isn't 0.12:

>>> one_two = 0.1 + 0.02
>>> one_two == 0.12
False
>>> one_two
0.12000000000000001

Using Decimal fixes this:

>>> from decimal import Decimal
>>> one_two = Decimal("0.1") + Decimal("0.02")
>>> one_two == Decimal("0.12")
True
>>> one_two
Decimal('0.12')

Note that we pass strings to Decimal.

🧵 (1/4)

#Python #DailyPythonTip

If you use the `setup-uv` #GitHub #Action in your workflows, consider upgrading to version 9.0.0 soon.

This version changes the default behavior to store the downloaded #Python wheels from #PyPI in GHA Cache, shedding load from PyPI, especially relevant for frequent CI/CD runs.

The maintainers considered this a breaking change, hence the version bump, probably because it flips existing expectations.

If you expected that the Action was caching downloads before, now it actually does, so it's a logical fix in that regard.
Read more: https://github.com/astral-sh/setup-uv/releases/tag/v9.0.0

Welcome @kushal back to the Python Security Response Team!

https://devguide.python.org/security/psrt/

Following PEP 811, we have a much clearer process for PSRT membership.

https://peps.python.org/pep-0811/

Thanks to Kushal and the rest of the team for helping keep Python secure.

https://hugovk.dev/blog/2026/security-line-goes-up/
#Python #security #PSRT

Bonjour à toutes et tous,

La Scop Le Filament cherche une développeuse ou un développeur Open Source, principalement pour du Python sur des modules Odoo.

L'offre d'emploi est ici : https://le-filament.com/offres-emploi/2026-07_developpeuse-odoo/

CDI forfait 200 jours, basé à Toulouse (télétravail ponctuel possible).

#jerecrute #odoo #python #logiciellibre #opensource

#offpunk 3.2 has been released.

The biggest news is that the network part is now handled by #curl (except for #geminiprotocol ). HTML tables are also supported !

https://git.sr.ht/~lioploum/offpunk/refs/v3.2

#smallWeb #python #cli

“So because we're using __slots__, we can't expand the number of attributes that are on each instance of this class.”

Read more 👉 https://pym.dev/__slots__/

#Python

@gemlog @bstuf @northernlights @claudiom @darkstar @stug @jirka @RJF @pizzapal @pizza_pal @stebby @normandc @kelbot Last but not least, I wanted to share my revamped version of an existing #Python #script for syncing #XOSS #bike #GPS #computers with PCs over #Bluetooth #BLE. My version also offers the option to delete fit files from the device and timestamps for benchmarking, amongst other features. What a great learning experience! #biking #cycling #biketooter https://github.com/molleraj/enhanced_xoss_sync

Python Tip #202 (of 365):

When prompting the user to enter a password, use getpass

The getpass.getpass function prompts the user to enter a password and what the user types is completely hidden:

>>> from getpass import getpass
>>> password = getpass()
Password:

🧵 (1/2)

#Python #DailyPythonTip

Want to support the PSF and stock up on #Python books at the same time? The 'Ultimate Python Development' Humble Bundle is available now 🐍 📚 You can customize your donation split: click "Adjust Donation" → "Custom Amount" to boost the % going to the PSF!
https://www.humblebundle.com/books/ultimate-python-development-bundle-packt-books

Candidature rejetée, après deux entretiens, parce que l'entreprise «s'oriente vers une adoption forte de l'IA dans ses pratiques de développement, une direction qui ne semble pas alignée avec vos attentes à ce stade».

Est-ce qu'il y a encore des éditeurs de logiciels en France qui sont prêts à embaucher un développeur qui préfère écrire lui-même son code ?

#GetFediHired #Rust #Scala #Python #PostgreSQL

I'm about to head home after a truly amazing experience at my first #EuroPython.
I was honored to be able to share some stories, but more importantly I met a bunch of awesome people.

Kudos to the @europython organization and all the folks who make magic happen!

This volunteer-driven event has been running for 25 years, and the overwhelming joy of bringing folks together from all over with a common thread is something you don't experience often (insert Free-threading joke here.)

I hope to return in the future!

#OpenSource #Python #Community

Alt...

EuroPython closing event with as many volunteers on stage as could make it

You probably won't use t-strings and Template objects in your own code, but you might pass them to code written by others.

Read more 👉 https://trey.io/n4mlgb

#Python

RE: https://mastodon.social/@farhanaliraza/116943042263956483

If you missed it over the weekend, @farhanaliraza released Taipan, which bundles a Python app (file, project, files, etc) into a one-file binary that just works.

I bundled up a few PyGame projects to try it out, and to my amazement, it just worked!

#Python #Zig

Python Tip #201 (of 365):

Suggest typo fixes with difflib.get_close_matches

>>> import difflib
>>> options = ['quack', 'swim', 'walk']
>>> difflib.get_close_matches('swam', options)
['swim']

If you want to control how close the match must be to be suggested, you can change the cutoff argument from its default (0.6):

>>> difflib.get_close_matches('swam', options, cutoff=0.5)
['swim', 'walk']

argparse's new suggest_on_error relies on this: https://docs.python.org/3/library/argparse.html#suggest-on-error

#Python #DailyPythonTip

💻 Akretion : Scop spécialisée dans l’intégration et le développement autour d’#Odoo, l’#ERP #opensource.

Créée en 2008, l'équipe de développeur·euses et consultant·es spécialisé·es accompagne les entreprises dans leurs projets de gestion : analyse des besoins, intégration, développement sur mesure, migration, hébergement, e-commerce, comptabilité, formation…

En tant que coopérative, le partage des connaissances et la gestion horizontale sont mots d'ordres.

#libre #Python #tech, #numérique

Alt...

ODOO : compatibilité, production, CRM, gestion commerciale, achat, point de vente.

I’ve published my @europython 2026 recap blog post 🇪🇺

It brings together the Mastodon posts and photos I shared live during the conference, creating a timeline of talks, community moments, people, ...👇
https://www.paulox.net/2026/07/20/my-europython-2026/

Credits 👥
@BajoranEngineer @Marlene @Yhg1s @ambv @anorthall @antocuni @baconandcoconut @bmispelon @dongheena @ester @gi0baro @hjwp @hugovk @hynek @kirschner @marco @miketheman @pauleveritt @sabderemane @saptaks @savannah @sethmlarson @vlad @wsvincent

#EuroPython #EP2026

“Any object that supports concatenation probably also supports self-concatenation.”

Read more 👉 https://pym.dev/self-concatenation/

#Python

Python Tip #200 (of 365):

Beta-test the latest Python version with uv

You can use uv to try out alpha, beta, and rc (release candidate) Python versions.

🧵 (1/4)

#Python #DailyPythonTip

Python Tip #199 (of 365):

Use uvx to try out tools without installing them 🧵

For example, "uvx fguess" installs & runs my fguess package in an isolated temporary environment.

This also doesn't JUST work with scripts. You can use uvx to try out Python packages in a REPL!

You can also use "uvx --with better-dedent python" to launch a REPL with my "better-dedent" package installed.

It'll even install Python 3.14 if needed since "better-dedent" requires it!

🧵 (1/2)

#Python #DailyPythonTip

“Standard error is often used for printing messages related to errors, but it's also used for diagnostic output or for pretty much any output that shouldn't be mixed together with the main program output.”

Read more 👉 https://pym.dev/standard-error/

#Python

🐍🚀 Out now: the final 3.15 beta, live from the #EuroPython sprints!

All the same goodies as beta 3, plus the official macOS installer now also installs the free-threaded `python3.15t` binary.

And thanks to 3.16 RM @savannah for helping out!

https://discuss.python.org/t/python-3-15-0-beta-4-is-here/108208

#Python #Python315

Alt...

People discussions and working on laptops in the EuroPython sprint room.

Just released! 🚀

🪑 PrettyTable 3.17.0

https://github.com/prettytable/prettytable/releases/tag/3.17.0

Add support for Python 3.15, drop 3.9, test 3.13t-3.15t
Set dicts with column-specific config for all column-specific attrs
Update type hints
Replace pre-commit with prek
& more!

#Python #release #PrettyTable #Python315 #Python39

🐍🚀 Out now: Python 3.15 alpha 7!

This is the first one with lazy imports (PEP 810) and frozendict (PEP 814)! Try it out and give us feedback.

https://discuss.python.org/t/python-3-15-0-alpha-7/106475

☃️ Just one alpha left until the feature freeze! Core team: get your PEPs in!

#Python #Python315 #release PEP810 #LazyImports #PEP814 #frozendict

It's been a fun and packed #EuroPython week, but it's not over. My main task for today's sprint is to release the final 3.15 beta with @savannah!🚀
#Python #python315

Alt...

Collage of photos of people and events of EuroPython: summits, talks, keynote, dinners...

Python Tip #198 (of 365):

Lock the dependencies for your Python scripts

After you start using inline script metadata to have uv automatically manage your script's dependencies (tip 197), how can you ensure the dependencies of your dependencies don't break your code?

You could pin your dependencies... but you'd also want to pin the dependencies of your dependencies and such.

🧵 (1/3)

#Python #DailyPythonTip

“The fromkeys method doesn't attempt to copy the object you give it.”

Read more 👉 https://pym.dev/default-dictionary-values/

#Python

Big thank you to all the many people who were involved in organising #europython ! Amazing how many people volunteered to make this event happen and enable the sharing of knowledge around #python ❤️

Alt...

stage with many people in yellow organiser shirts

Oh wow, that's a pretty bad #Python regression: https://bugs.debian.org/1141977

Fixed packages should end up in trixie-proposed-updates (for inclusion in the next point release) but should also be published via trixie-updates much earlier: https://bugs.debian.org/1142261

Pallets now documents our LLM and AI tool use policy, explaining why we value human contributions rather than trying to instruct the tools. I don't think this will make a difference to the amount of generated junk we get, but I hope people who care find value in it. https://palletsprojects.com/contributing/llm-ai #Python #Flask #OpenSource

Python Tip #197 (of 365):

Use uv for one-off Python scripts

Have a Python script that requires dependencies?

Use inline script metadata, change your file mode to executable, and put this shebang line at the top of the file:

#!/usr/bin/env -S uv run --script

To add a dependency to your script, you can either manually edit the "# /// script" block by hand or use "uv add":

$ uv add --script my_script.py requests

🧵 (1/3)

#Python #DailyPythonTip

It's 2026 and #Python's standard library *still* does not have a flatten function? 🤨

(Yes, more-itertools, that's not the point)

New blogpost!

https://xaselgio.net/posts/029.shazam_export/

I have used Shazam, the song identification app, for several years.
While it still serves its purpose marvelously, I do not feel okay with the idea of keeping the history of songs I found this way on this service, with no way to export it.

In this blogpost, I dig into how to export your Shazam library as a readable CSV.
I also describe my little scripting adventure to make a Python script which would use that CSV to download music from Youtube (using yt-dlp) and then make sure that it is the right song, matching what was inside the CSV export.

Sources are available on our Git forge as well.~
Hope you'll enjoy the read!~

#BlogPost #Shazam #Python

Listening to @anwesha speak on Demystifying the EU Cyber Resilience Act at #EuroPython2026

This slide is the new reality!

#EP2026 #OpenSource #Security #Python

“Once the condition becomes False (or a falsey value) the loop stops.”

Read more 👉 https://pym.dev/while-loops/

#Python

Python Tip #196 (of 365):

Manage your virtual environments with uv

You can get the speed of uv while still using venvs and pip the way you always have.

Instead of "python3.14 -m venv .venv", use "uv venv -p 3.14"

Instead of "pip install" use "uv pip install"

But... why?

Speed!

Using "uv pip install" is often MUCH faster than using "pip install".

🧵 (1/2)

#Python #DailyPythonTip

I wrote this function to do some math, and I got it working, tested it, but now I have to explain it to someone and...

Well, that's the difficult part!

I knew the input and desired output and built up how to get what I needed but making it explainable is a bit of a challenge...

Which is good though, as it's forcing me to double-check my work.

(And I am *not* good at math!)

#teaching #math #python #programming

"We're just normal men" -- @ambv, with Pablo interviewing Guido at #EuroPython.
#Python #CorePy

Alt...

Seated on stage: Pablo in a baby shark hat, Guido in a octopus hat, and Łukasz in a. VLC traffic cone hat.

The state of #Python ecosystem right now: almost everything is slop. Some projects are complete vibe-coded slop (autobahn, chardet, cryptography). Some projects are disguised slop ("Coding agents shouldn't co-author themselves.")

There is only a handful of human projects left (Flask being one bright example). And they're being killed. They're being killed by the neverending slew of slop pull requests. They're being killed by all their dependencies becoming slop. They're being killed because this whole ecosystem has became such a complete cesspit that you have zero motivation to do anything.

EDIT: and honestly, this is only going to get worse. When you kill the incentive to work on projects, you only get more slop. Maintainers give in, and more projects become slop. Or they give up, and projects get forked unto slop.

#NoAI #NoLLM

We want your vote! Voting eligible PSF Members (Supporting, Contributing, and Fellow) need to affirm their membership to vote in this year’s PSF Board and/or Python Packaging Council elections to ensure that each election reaches quorum 🗳️ #python

https://pyfound.blogspot.com/2026/07/affirm-PSF-voting-status-2026.html

Ayé, #Python 3.14 est dans #Debian Forky (aka Testing)

Et oui, il y a la blague (faite par python3-venv je dirais)

$ /opt/venv/john/bin/πthon -V
Python 3.14.6

The state of #Python ecosystem right now: almost everything is slop. Some projects are complete vibe-coded slop (autobahn, chardet, cryptography). Some projects are disguised slop ("Coding agents shouldn't co-author themselves.")

There is only a handful of human projects left (Flask being one bright example). And they're being killed. They're being killed by the neverending slew of slop pull requests. They're being killed by all their dependencies becoming slop. They're being killed because this whole ecosystem has became such a complete cesspit that you have zero motivation to do anything.

EDIT: and honestly, this is only going to get worse. When you kill the incentive to work on projects, you only get more slop. Maintainers give in, and more projects become slop. Or they give up, and projects get forked unto slop.

#NoAI #NoLLM

Python sees a line feed (\n) as the canonical way to represent a newline.

Read more 👉 https://trey.io/ca0qyn

#Python

We're #hiring at PowerDash! I know there are a lot of people in my network with the perfect mix of skills for this role — full stack with a strong #Python / #Django bent. Throw your hat in, or pass the word. It's a great little company in an important space.

Office is in Cambridge (Harvard Square). Role is on-site or hybrid.

Senior Full Stack Software Engineer: https://apply.workable.com/powerdash/j/7BE934710D/

✍️ New post covering a debugging hack using gc.get_objects() to find all instances of a class in Python.

https://adamj.eu/tech/2026/07/14/python-all-instances-class/

#Python

Python Tip #195 (of 365):

Globally install Python-powered command-line tools with "uv tool install"

To install my Python-powered countdown-cli globally, I can do this:

$ uv tool install countdown-cli
Resolved 2 packages in 169ms
Installed 2 packages in 5ms
+ click==8.3.2
+ countdown-cli==2.2.1
Installed 1 executable: countdown

Then I can run "countdown" ANYWHERE on my machine to start a countdown timer.

🧵 (1/3)

#Python #DailyPythonTip

Finally!

⚡ Lightning talks! ⚡

Mark Shannon - One-time ABI breakage

Daniele Parmeggiani – Safer and Generic Interruptions

@kushal - EktuPy, Python for Scratch generation

@gpshead & @ambv - agents.md and skills for CPython repo

Ken Jin - pls read PEP 836

And we're done! That was fun! The next Language Summit will be at @pycon US next year at Long Beach, then back at @europython for 2028!

#Python #LanguageSummit #EuroPython

Alt...

Mark

Alt...

Daniele

Alt...

Kushal

Alt...

Łukasz and Greg

Last regular talk/discussion before lightning talks!

PEP 827 - Type manipulation and annotationlib — Michael J. Sullivan

https://ep2026.europython.eu/language-summit/#pep-827---type-manipulation-and-annotationlib--michael-j-sullivan

#Python #LanguageSummit #EuroPython

Alt...

Sully presenting.

Alt...

Łukasz asking.

Alt...

Daniele asking.

Alt...

Yury asking.

I wrote about how, like many other open-source projects, CPython is experiencing a huge increase in security reports. Charts inside!
https://hugovk.dev/blog/2026/security-line-goes-up/
#Python #security #OpenSource

And now:

Thinking about the post era of free-threading Python — @dongheena, Tobias Wrigstad, Fridtjof

https://ep2026.europython.eu/language-summit/#thinking-about-the-post-era-of-free-threading-python--donghee-na-tobias-wrigstad-fridtjof

#Python #LanguageSummit #EuroPython

Alt...

Tobias, Donghee and Fridtjof presenting.

Alt...

Fridtjof presenting.

Alt...

Tobias answering a question, Donghee and Fridtjof on stage.

Alt...

Thomas asking.

The July edition of the PSF Board Office Hour is about to begin 🐍 🗒️ 1 PM UTC. We welcome you to join us to share how we can help your community, express your perspectives, and we'd love to answer your questions about the upcoming PSF Board Election! #python
https://pyfound.blogspot.com/2025/10/a-new-psf-board-another-year-of-psf.html

Next up!

Developer in Residence update & future — @encukou

https://ep2026.europython.eu/language-summit/#developer-in-residence-update--future--petr-viktorin

#Python #LanguageSummit #EuroPython

Alt...

Petr presenting.

Alt...

Slide showing dev-in-res responsibilities.

Alt...

Toshio asking.

Alt...

Savannah asking.

On my way to Krakow to attend @europython 2026 🇪🇺

PSR to KRK ✈️

See you all there 👋

CC @europython

#EP2026 #EuroPython #PyCon #Python

Alt...

A selfie of me with an airplane in the background

Then:

Spicycrab, the Rust transpiler — @kushal

https://ep2026.europython.eu/language-summit/#spicycrab-the-rust-transpiler--kushal-das

#Python #LanguageSummit #EuroPython

Alt...

Kushal presenting.

Alt...

Ken Jin asking.

Alt...

Greg asking.

Back from lunch!

A Roadmap for Rust for CPython — @davidhewitt

https://ep2026.europython.eu/language-summit/#a-roadmap-for-rust-for-cpython--david-hewitt

#Python #LanguageSummit #EuroPython

Alt...

David presenting.

Alt...

A proposed roadmap for Rust for CPython.

Alt...

Pablo asking a question.

A packed morning concludes with:

Memory snapshots and the CPython runtime — Hood Chatham

https://ep2026.europython.eu/language-summit/#memory-snapshots-and-the-cpython-runtime--hood-chatham

#Python #LanguageSummit #EuroPython

Alt...

Hood presenting.

Alt...

Mark Shannon asking a question.

And then:

Improving the Python buffer protocol — Nathan Goldbaum

https://ep2026.europython.eu/language-summit/#improving-the-python-buffer-protocol--nathan-goldbaum

#Python #LanguageSummit #EuroPython

Alt...

Nathan presenting.

Alt...

Hood Chatham asking a question.

And now:

GC: Generational? Incremental? Both. — Mark Shannon

https://ep2026.europython.eu/language-summit/#gc-generational-incremental-both--mark-shannon

#Python #LanguageSummit #EuroPython

Alt...

Mark presenting

Alt...

Attendees sitting in a big U shape, about 15 per section.

Alt...

Larry Hastings asking a question.

Alt...

Pablo Galindo Salgado asking a question.

Next up:

Python releases for macOS — Ned Deily

https://ep2026.europython.eu/language-summit/#python-releases-for-macos--ned-deily
#Python #LanguageSummit #EuroPython

First up: One namespace to namespacing them all — Pablo Galindo Salgado

https://ep2026.europython.eu/language-summit/#one-namespace-to-namespacing-them-all--pablo-galindo-salgado

#Python #LanguageSummit #EuroPython

Alt...

Pablo presenting

Hello from Kraków and the sun is shining for the #Python #LanguageSummit at #EuroPython!

Alt...

The Wawel caste reflecting across the Vistula river.

Python Tip #194 (of 365):

Install Python with uv

I recommend using:

$ uv python install --default 3.14

Specifying "--default" will install symbolic links for python, python3, and python3.N (where N is the minor version number).

Using uv to install Python makes it easy to upgrade subminor versions.

Just run:

$ uv python upgrade

If you have Python 3.14.4 installed after 3.14.5 is out, that "python upgrade" command will install it.

🧵 (1/3)

#Python #DailyPythonTip

Python Tip #193 (of 365):

To compare iterables while ignoring order and duplication, use a set equality check.

Like this:

>>> set(iterable1) == set(iterable2)
True

Like all things set-related, this requires hashable items.

🧵 (1/2)

#Python #DailyPythonTip

“Unless you really need an index for your substring match, a containment check will do just fine.”

Read more 👉 https://pym.dev/avoid-indexes-in-python/

#Python

“Sorted will call that key function on each item in the given iterable, and it'll sort the items by the result of whatever that key function returns for each item.”

Read more 👉 https://pym.dev/sorting-in-python/

#Python

Python Tip #192 (of 365):

To compare iterables while counting duplicates but ignoring order, use Counter.

A Counter tallies how many times each item appears. Counters are equal when every item appears the same number of times, regardless of order:

>>> from collections import Counter
>>> Counter([1, 2, 2, 3]) == Counter([3, 2, 1, 2])
True
>>> Counter([1, 2, 3]) == Counter([1, 2, 2, 3])
False

The second check is False because one iterable has an extra 2.

🧵 (1/2)

#Python #DailyPythonTip

Python Tip #191 (of 365):

Compare iterables item-by-item with all() & zip().

The == operator won't compare a list and a tuple by their contents:

>>> a = [1, 2, 3]
>>> b = (1, 2, 3)
>>> a == b
False

And two generators can't be compared by their contents at all.

You can compare any iterables item-by-item, regardless of their type like this:

>>> all(x == y for x, y in zip(a, b, strict=True))
True

🧵 (1/2)

#Python #DailyPythonTip

📰 Issue 345: Django security releases issued: 6.0.7 and 5.2.16

https://django-news.com/archive/issue-345-django-security-releases-issued-607-and/

#Python #Django #DjangoNews

“The simplest use of a set is probably also its most common use: checking for duplicates.”

Read more 👉 https://pym.dev/practical-uses-of-sets/

#Python

Runloom – Go-style coroutines for Python free-threaded

https://github.com/robertsdotpm/runloom

Comments: https://news.ycombinator.com/item?id=48859387

#HackerNews #Runloom #Go-style #coroutines #Python #free-threaded #GitHub #PythonProgramming #AsyncPython #Concurrency

Python Tip #190 (of 365):

To remove duplicates while maintaining the original iterable order, use dict.fromkeys.

Converting to a set removes duplicates, but it loses the original order:

>>> colors = ["red", "green", "blue", "green", "red"]
>>> set(colors)
{'blue', 'green', 'red'}

🧵 (1/2)

#Python #DailyPythonTip

Dear #lazyweb,

I am looking for a way to generate a simple #parser in #Python without extra run-time dependencies.

I am happy to use whatever tooling is needed to generate the parser, but the generated Python code must be standalone (just like lex/yacc generate standalone C code).

I found a lot of parser generators for Python but they all introduce run-time dependencies that I would really like to avoid.

Do you know a tool that fits this use-case?

Retoots appreciated!

“It's easy to overdo it when defaulting dictionary values.”

Read more 👉 https://pym.dev/default-dictionary-values/

#Python

I am wondering how many of #python friends here worked with #graalpy? #JVM

Any Python users here? Not really a Python dev here, but I use pip when asked to install something. Today I saw `uv` to install something.

Which do Python devs here prefer, `uv` or `pip`?

#python

Happy to announce the release of slixmpp, the python XMPP library in its 1.17.0 version.

It has a few improvements alongside an important bugfix for components, as well as many other changes.

Read the full changelog at https://blog.mathieui.net/slixmpp-1-17.html
#python #xmpp

“But what if you need to perform an operation repeatedly and you don't have an iterable to loop over?”

Read more 👉 https://pym.dev/while-loops/

#Python

How I fixed the dictionary with Python 3.14:

https://hugovk.dev/blog/2026/fixing-dict/

#python #python314 #dictionary #release #pi

Python Tip #189 (of 365):

Check for duplicates by converting to a set.

To check whether your collection contains duplicate items, make a set out of it and compare the original length to the set length:

>>> len(set(colors)) == len(colors)
False

Sets can't hold duplicates, so if a set conversion shrinks the length, there were duplicates.

A caveat: this assumes all item are hashable (like strings, numbers, & tuples of hashable items).

More: https://pym.dev/practical-uses-of-sets/

#Python #DailyPythonTip

https://dev.to/codingjoe_dev/rebuilding-instagram-in-2026-3m00

#django #python #instagram #pillow #imageprocessing

BIG NEWS! 😮

#Django got another task backend. 🎉

Threadmill has a durable message queue based on Redis as well as a monitoring interface based on textual.

https://github.com/codingjoe/threadmill

#Django #redis #valkey #textual #python #tui #tasks #celery #dramatiq

I keep asking the same question on every Django project: where do my queries actually go?
Wrote up the answer that's worked for me — selectors: plain functions, one per use case, no magic. Views go back to being thin controllers, services shed 40–60% of their bulk.
https://medium.com/ambient-innovation/the-missing-link-thinking-in-use-cases-with-django-query-selectors-82fd4c9860f5
#Django #Python #WebDev

What's New in Python 3.15:

Upgraded JIT compiler

Results from pyperformance suite: 8-9% geometric mean performance improvement over the standard CPython interpreter built with all optimisations enabled on x86-64 Linux.

On AArch64 macOS, 12-13% speedup over the tail calling interpreter with all optimisations enabled.

The speedups versus no JIT builds range from roughly 15% slowdown to over 100% speedup on x86-64 Linux and AArch64 macOS.

https://docs.python.org/3.15/whatsnew/3.15.html#upgraded-jit-compiler

#Python #Python315 #WhatsNew

RE: https://fosstodon.org/@pillow/116844696941687840

New @pillow release!

🛞 Wheels for Python 3.15 beta
🧾 An SBOM in all the wheels
🚅 Performance improvements thanks to @akx
🔒 Security fixes
❌ No longer a wheel for free-threaded Python 3.13, it was experimental and 3.14+ has official support with better performance

#Python #Pillow #PythonPillow #release #security #Python315 #SBOM

To remember that you need strptime for parsing instead of strftime, remember that it's "string parse time" and "string format time".

Read more 👉 https://trey.io/l4b84k

#Python

#FediHire #GetFediHired

Hi All, I am looking for full time, mid-senior level UK #Python job roles. I am based in the UK and I've got 9 years experience working with it primarily in scientific disciplines (Earth Observation #EO #RemoteSensing) and a small amount in doing backend work. I've designed a wide variety of scientific Python scripts and programs and I've had the privellige of working with #ESA on several projects including presenting my work internationally and having my investigations published on their websites.

I'm looking for more coding work in scientific disciplines or more #Humanitarian work if possible. I am also skilled in QA like work, deep analysis, Git and self hosting.

I'm primarily open to remote work within the UK and remote European work dependent on what is available. I am open to hybrid work based in Buckinghamshire but it would preferably have to be 1 day a week in an office, potentially 2. Reply or DM me for more details. Boosts appreciated!

Python Tip #188 (of 365):

To find the first item that matches a condition, combine next with a generator expression.

Like this:

>>> numbers = [4, -1, 8, -3, 0, 6]
>>> next(n for n in numbers if n < 0)
-1

The generator expression finds matching items lazily and next stops as soon as a match is found.

🧵 (1/2)

#Python #DailyPythonTip

@treyhunner I love your contribution to #Python 3.14!
It often are the small things that are the most annoying. :)

You shouldn’t trust Trusted Publishing

https://blog.yossarian.net/2026/07/07/You-shouldnt-trust-trusted-publishing

#python #security #oss

Python-Power für dein Terminal! 🐍 Heute im #toolsday: **xonsh**.

Es ist kein einfacher Bash-Ersatz, sondern eine Shell, die Python 3 als Grundlage nutzt. Das heißt: Shell-Befehle und Python-Code nahtlos mischen! Pipelines, Variablen, Module – alles in einem Guss. 🚀

Nutzt ihr schon Python-Logik direkt in eurer Shell oder bleibt ihr bei klassischer Bash/Zsh? Schreibt es uns! 🎙️

Link: https://xon.sh/

#xonsh #Python #CLI #Terminal #Shell #OpenSource #RadioTux #Linux

Python Tip #187 (of 365):

Need to count how many items match a condition? Sum up booleans. 🧵

Booleans are integers in Python:

>>> issubclass(bool, int)
True

True acts just like 1 and False acts just like 0.

I wouldn't rely on that fact often... BUT there's one specific place where this fact is very handy...

🧵 (1/3)

#Python #DailyPythonTip

And if you need #XML #SECURITY then use https://pybergshamra.readthedocs.io/en/latest/ for all #xmlsec in pure #rust level in #python.

https://pyuppsala.readthedocs.io/en/latest/ I released 0.9.0 of my #rust based #python #XML library. A lot of #security hardening and very good #performance improvement.

What's New in Python 3.15:

warnings

* Improve filtering by module in warnings.warn_explicit() if no module argument is passed. It now tests the module regular expression in the warnings filter not only against the filename with .py stripped, but also against module names constructed starting from different parent directories of the filename (with /__init__.py, .py and, on Windows, .pyw stripped). (Contributed by Serhiy Storchaka.)

https://docs.python.org/3.15/whatsnew/3.15.html#warnings

#Python #Python315 #WhatsNew

Appel à bonnes âmes 😁

Mon compagnon, cet homme incroyable, m'a fait un script python pour me permettre de tamponner des pièces de procédure en 3 secondes.

En ayant parlé à d'autres, il s'avère qu'iels seraient intéressé.e.s mais ne sont pas sous linux (cheh)

J'ai deux questions :
- où mettre son dépôt git pour pouvoir le partager
- est-ce qu'il y a des trucs pour pouvoir faire fonctionner facilement ce truc sans passer par un terminal => le rendre humain compatible 😁 et éventuellement mac et windows accessible
Tout en réalisant le traitement sur le PC et non en ligne (secret pro 4ever)

Merci d'avance pour votre aide

#opensource #python #git

Python's error messages have improved a lot in the past few versions, and this is exactly the kind of change that makes Python even more beginner-friendly.

Read more 👉 https://trey.io/flfwr9

#Python

I wrote something today using __init_subclass__. Do I get a prize?

#python

Fiston est méga motivé pour, à la rentrée, remplir un site web avec
- photo d'aménagement piéton/vélo ridicule
- localisation dans l'agglo
- textes

Si possible avec des mômes de son âge, qui feront le design.

Je vais bien sûr mettre ce site web en place.
Idéalement, j'aimerais que ça soit le moins de maintenance possible hors mises à jour de contenu.

En gros, une galerie de photos géolocalisées et un blog. Je parle pas trop mal le #Python et je tiens pas à tout réinventer.

#Help

Python Tip #186 (of 365):

Use the errors argument when reading files with encoding issues.

When reading a file, invalid bytes in the chosen encoding will raise an exception:

>>> p = pathlib.Path("p")
>>> p.write_text("café", encoding="cp1252")
>>> p.‍read_text(encoding="utf-8")
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe9 in position 3: unexpected end of data

With the "errors" argument, we can suppress this exception.

🧵 (1/3)

#Python #DailyPythonTip

“Python's while loops are for looping based on a condition.”

Read more 👉 https://pym.dev/while-loops/

#Python

Sans doute la façon la plus simple de télécharger un album, un artiste depuis Spotify. L'astuce, c'est bien sûr qu'il ne télécharge pas les chansons depuis Spotify. Le seul truc à personnaliser, c'est le format des fichiers (j'utilise ce formatage "output": "{artist}/({year}) - {album}/{track-number} - {title}.{output-ext}") https://spotdl.github.io/spotify-downloader/ #spotify #download #script #python #automatisation

“What if you want every key lookup you ever perform on your dictionary to have a default value?”

Read more 👉 https://pym.dev/default-dictionary-values/

#Python

Python Tip #185 (of 365):

Normalize Unicode strings before comparing them.

Some Unicode characters can be written in more than one way.

Python's == won't consider them equal even if they look identical.

Use unicodedata.normalize() to fix this.

The letter "é" can be stored two ways:

• 1 precomposed character
• "e" plus a combining accent

Both look the same, but they're not:

>>> x, y = "café", "café"
>>> x == y
False
>>> len(x), len(y)
(4, 5)

🧵 (1/2)

#Python #DailyPythonTip

The reversed() function works on all sequences, but it also works on some other iterables, like dictionaries

Read more 👉 https://trey.io/ur7l4g

#Python

step 1: do an experimental JIT
step 2: do a website called https://www.doesjitgobrrr.com to track performance
step 3: write a PEP called "JIT Go Brrr"
step 4: non-experimental JIT gone brrr?
step 5: CPython gone brr?
step 6: brrr?

https://peps.python.org/pep-0836/
#Python #CPython #JIT #PEP #PEP836 #JIT #GoBrrr

Python Tip #184 (of 365):

Always specify the encoding when opening text files.

With no encoding specified, Python will pick a platform-dependent default encoding.

A wrong encoding may raise an exception or may result in "mojibake" (garbled nonsense).

Opening a UTF-8 file as CP-1252 turns "✨" into "✨":

>>> path = pathlib.Path("sparkles.txt")
>>> path.write_text("✨", encoding="utf-8")
>>> https://path.read_text(encoding="cp1252")
'✨'

🧵 (1/2)

#Python #DailyPythonTip

🎉 The Call for Proposals for PyCon NL 2026 is OPEN!

📅 15 October 2026
📍 Jaarbeurs Utrecht

We want to hear YOUR Python story. Beginner talk, deep technical dive, war story from production, something completely quirky... we want it all 🐍✨

Do you want to give a workshop? Perfect! We have a track for that as well 💪

👉 Submit your talk (or workshop!) here: https://www.pycon-nl.org/call-for-papers

#python #cfp #callforproposals #pyconnl

🗓️ The Language Summit schedule is now up!

https://ep2026.europython.eu/language-summit/#schedule

⚡ Lightning talks can be submitted on site on the day.

#LanguageSummit #EuroPython #Python

Have you written a new PEP and are ready for a PEP number? (Either you're a Python core team member or found one to sponsor your PEP.)

Old way: scour through https://peps.python.org/ and https://github.com/python/peps/pulls to find which is next