Trey Hunner
treyhunner.com · Personal blog · on HN since 2014
Trey Hunner, a Python trainer, writes tutorials on Python idioms, built-ins, comprehensions and tooling, including uv scripts.
What HN saysHN commenters link his lazy self-installing uv script post for the shebang trick, and his animated list comprehension and PyCon posts.
31HN people shared it
10linked it in comments
38stories submitted
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Most-shared posts
- 1Lazy self-installing Python scripts with uv4 people · 11 points · first shared 2024 · 1 comments on HN
- 2Python: Range is not an iterator (2018)4 people · 5 points · first shared 2018 · discussion on HN
- 3Overusing list comprehensions and generator expressions in Python3 people · 9 points · first shared 2019 · discussion on HN
- 4The problem with inheriting from list and dict in Python3 people · 3 points · first shared 2019 · discussion on HN
- 5Python built-ins worth learning2 people · 575 points · first shared 2019 · 118 comments on HN
- 6Asterisks in Python2 people · 222 points · first shared 2018 · 106 comments on HN
- 7Counting Things in Python: A History2 people · 213 points · first shared 2015 · 51 comments on HN
- 8Multiple assignment and tuple unpacking improve Python code readability (2018)2 people · 169 points · first shared 2018 · 96 comments on HN
- 9The Idiomatic Way to Merge Dictionaries in Python2 people · 38 points · first shared 2016 · 9 comments on HN
- 10What's great about Python 3.10? – Trey Hunner2 people · 6 points · first shared 2021 · discussion on HN
- 11Why you should be using pathlib (Python)2 people · 4 points · first shared 2018 · discussion on HN
- 12Unique sentinel values and identity checks in Python2 people · 3 points · first shared 2019 · discussion on HN
- 13How to have a great first PyCon2 people · 2 points · first shared 2018 · discussion on HN
- 14Supporting Both Django 1.7 and South2 people · 1 points · first shared 2014 · discussion on HN
- 15Python List Comprehensions Explained Visually1 people · 138 points · first shared 2015 · 78 comments on HN
What HN people wrote when they linked it
celias · 2019-10-31
Here are a couple of articles about attending PyCon
Trey Hunter's article "How to have a great first PyCon" including advice on how to overcome feeling like an imposter or an outsider
https://treyhunner.com/2018/04/how-to-make-the-most-of-your-first-pyco…
Al Sweigart's PyCon advice, including his shirt color trick for meeting new people
https://automatetheboringstuff.com/how-to-do-pycon.html
tsurantino · 2015-12-02
For those confused - the visual part is done in a GIF (i.e. http://treyhunner.com/images/list-comprehension-condition.gif).
I think animating the transformation from a normal loop to a list comprehension is a great way to show how the syntax translates between the two forms. Very awesome and comprehensive post.
trymas · 2025-10-30
You can setup uv inside your script, without a project.
Example: https://treyhunner.com/2024/12/lazy-self-installing-python-scripts-wit…
simonw · 2025-07-06
Use this as your shebang line:
#!/usr/bin/env -S uv run --script https://treyhunner.com/2024/12/lazy-self-installing-python-scripts-wit…
I don't think requiring all CLI tools to be "native binaries" makes sense. Plenty of popular CLI tools are not compiled binaries. The Python and Node.js ecosystems run on those.
nikkindev · 2025-01-28
“Lazy self-installing Python scripts with uv”[1] article from Trey Hunner has more details with examples
[1] https://treyhunner.com/2024/12/lazy-self-installing-python-scripts-wit…
hprotagonist · 2021-06-24
and even then, it's a faff and a half: https://treyhunner.com/2019/04/why-you-shouldnt-inherit-from-list-and-…
sdoering · 2020-07-27
Thank you very much. I am using python for some time now. Stumbled upon this, but never took the time to read up on it. If anybody also wants to know more I found this extensive post explaining the concepts behind * and in python (not in multiplication):
https://treyhunner.com/2018/10/asterisks-in-python-what-they-are-and-h…
edudobay · 2017-05-04
Regarding Python, there _is_ a solution for the 3.x, <3.5 world. I would suggest the itertools.chain approach as noted in the "Chain items" section here: http://treyhunner.com/2016/02/how-to-merge-dictionaries-in-python/
peter_l_downs · 2014-04-01
Yeah, that would be awesome. I haven't looked into it yet but if you'd be willing to help out we'd be happy to accept contributions! The one thing that I think might be tricky with including standard migrations is keeping them compatible with Django 1.4-1.6; although it seems to be possible to have both in a given package [0] it doesn't seem all that user-friendly.
[0]: http://treyhunner.com/2014/03/migrating-to-django-1-dot-7/
asicsp · 2021-11-25
I'm a self-published author and these are my offers till end of this month:
1) "Practice Python Projects" (https://learnbyexample.gumroad.com/l/py_projects/blackfriday) ebook is free (normal price $10)
2) "Learn by example Python bundle" (https://learnbyexample.gumroad.com/l/python-bundle/blackfriday) is $2 (normal price $12) - three ebooks titled "Python re(gex)?", "100 Page Python Intro" and "Practice Python Projects"
3) "All Books Bundle" (https://learnbyexample.gumroad.com/l/all-books/blackfriday) is $5 (normal price $22) - includes all three Python books mentioned in the bundle above and eight other books on regular expressions and CLI one-liners
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I know a couple of blog posts by indie creators with their own sales and links to other programming deals:
* https://treyhunner.com/2021/11/python-black-friday-and-cyber-monday-sa…
* https://www.blog.pythonlibrary.org/2021/11/24/python-black-friday-cybe…