Trey Hunner
@trey.io
Python & Django team trainer
I help folks sharpen their Python skills with https://PythonMorsels.com 🐍🍪
YIMBY. 95% vegan.
I help folks sharpen their Python skills with https://PythonMorsels.com 🐍🍪
YIMBY. 95% vegan.
When your UI makes a user think "eh there's a 75% chance that this is the right button", something has gone wrong.
February 12, 2026 at 1:52 AM
When your UI makes a user think "eh there's a 75% chance that this is the right button", something has gone wrong.
Python Tip #42 (of 365):
Avoid manually merging dictionaries. Use "a | b" instead. 🧵
Let's say you have 2 dictionaries:
context = {"language": "en", "timezone": "UTC"}
more_context = {"title": "Home", "breadcrumbs": ["Home"]}
And you'd like to merge them together...
#Python #DailyPythonTip
Avoid manually merging dictionaries. Use "a | b" instead. 🧵
Let's say you have 2 dictionaries:
context = {"language": "en", "timezone": "UTC"}
more_context = {"title": "Home", "breadcrumbs": ["Home"]}
And you'd like to merge them together...
#Python #DailyPythonTip
February 11, 2026 at 11:45 PM
Python Tip #42 (of 365):
Avoid manually merging dictionaries. Use "a | b" instead. 🧵
Let's say you have 2 dictionaries:
context = {"language": "en", "timezone": "UTC"}
more_context = {"title": "Home", "breadcrumbs": ["Home"]}
And you'd like to merge them together...
#Python #DailyPythonTip
Avoid manually merging dictionaries. Use "a | b" instead. 🧵
Let's say you have 2 dictionaries:
context = {"language": "en", "timezone": "UTC"}
more_context = {"title": "Home", "breadcrumbs": ["Home"]}
And you'd like to merge them together...
#Python #DailyPythonTip
New screencast on the lack of switch-case in #Python.
Instead of reaching for match-case as a switch-case replacement, I'd recommend using a dictionary.
Also see today's #DailyPythonTip on replacing if-elif chains with dictionaries.
Instead of reaching for match-case as a switch-case replacement, I'd recommend using a dictionary.
Also see today's #DailyPythonTip on replacing if-elif chains with dictionaries.
Need switch-case in Python? It's not match-case!
Python's match-case is not a switch-case statement. If you need switch-case, you can often use a dictionary instead.
pym.dev
February 10, 2026 at 11:45 PM
New screencast on the lack of switch-case in #Python.
Instead of reaching for match-case as a switch-case replacement, I'd recommend using a dictionary.
Also see today's #DailyPythonTip on replacing if-elif chains with dictionaries.
Instead of reaching for match-case as a switch-case replacement, I'd recommend using a dictionary.
Also see today's #DailyPythonTip on replacing if-elif chains with dictionaries.
Python Tip #41 (of 365):
Consider using dictionaries to replace if-elif chains. 🧵
#Python #DailyPythonTip
Consider using dictionaries to replace if-elif chains. 🧵
#Python #DailyPythonTip
February 10, 2026 at 6:07 PM
Python Tip #41 (of 365):
Consider using dictionaries to replace if-elif chains. 🧵
#Python #DailyPythonTip
Consider using dictionaries to replace if-elif chains. 🧵
#Python #DailyPythonTip
Python Tip #40 (of 365):
Use dictionaries for grouping items (by using a dictionary of lists, sets, or other data structures). 🧵
This week's tips are all about dictionaries.
#Python #DailyPythonTip
Use dictionaries for grouping items (by using a dictionary of lists, sets, or other data structures). 🧵
This week's tips are all about dictionaries.
#Python #DailyPythonTip
February 9, 2026 at 11:45 PM
Python Tip #40 (of 365):
Use dictionaries for grouping items (by using a dictionary of lists, sets, or other data structures). 🧵
This week's tips are all about dictionaries.
#Python #DailyPythonTip
Use dictionaries for grouping items (by using a dictionary of lists, sets, or other data structures). 🧵
This week's tips are all about dictionaries.
#Python #DailyPythonTip
Python Tip #37 (of 365):
Avoid overusing the term "method". 🧵
In Python, the words "function" and "method" are not interchangeable.
All methods are functions, but not all functions are methods.
#Python #DailyPythonTip
Avoid overusing the term "method". 🧵
In Python, the words "function" and "method" are not interchangeable.
All methods are functions, but not all functions are methods.
#Python #DailyPythonTip
February 8, 2026 at 7:04 PM
Python Tip #37 (of 365):
Avoid overusing the term "method". 🧵
In Python, the words "function" and "method" are not interchangeable.
All methods are functions, but not all functions are methods.
#Python #DailyPythonTip
Avoid overusing the term "method". 🧵
In Python, the words "function" and "method" are not interchangeable.
All methods are functions, but not all functions are methods.
#Python #DailyPythonTip
Python Tip #36 (of 365):
When accepting any number of objects to a function, consider when to accept an iterable and when to use * instead. 🧵
#Python #DailyPythonTip
When accepting any number of objects to a function, consider when to accept an iterable and when to use * instead. 🧵
#Python #DailyPythonTip
February 7, 2026 at 7:04 PM
Python Tip #36 (of 365):
When accepting any number of objects to a function, consider when to accept an iterable and when to use * instead. 🧵
#Python #DailyPythonTip
When accepting any number of objects to a function, consider when to accept an iterable and when to use * instead. 🧵
#Python #DailyPythonTip
Python Tip #37 (of 365):
If you're missing function overloading from another programming language, try default argument values as an alternative. 🧵
Default arguments are not a full replacement for function overloading, but they can often be used to reach a similar end.
#Python #DailyPythonTip
If you're missing function overloading from another programming language, try default argument values as an alternative. 🧵
Default arguments are not a full replacement for function overloading, but they can often be used to reach a similar end.
#Python #DailyPythonTip
February 6, 2026 at 7:04 PM
Python Tip #37 (of 365):
If you're missing function overloading from another programming language, try default argument values as an alternative. 🧵
Default arguments are not a full replacement for function overloading, but they can often be used to reach a similar end.
#Python #DailyPythonTip
If you're missing function overloading from another programming language, try default argument values as an alternative. 🧵
Default arguments are not a full replacement for function overloading, but they can often be used to reach a similar end.
#Python #DailyPythonTip
Python Tip #36 (of 365):
Instead of assigning a lambda function to a variable, use a "def" statement. 🧵
Instead of this:
square = lambda n: n**2
Write this:
def square(n): return n**2
#Python #DailyPythonTip
Instead of assigning a lambda function to a variable, use a "def" statement. 🧵
Instead of this:
square = lambda n: n**2
Write this:
def square(n): return n**2
#Python #DailyPythonTip
February 5, 2026 at 7:04 PM
Python Tip #36 (of 365):
Instead of assigning a lambda function to a variable, use a "def" statement. 🧵
Instead of this:
square = lambda n: n**2
Write this:
def square(n): return n**2
#Python #DailyPythonTip
Instead of assigning a lambda function to a variable, use a "def" statement. 🧵
Instead of this:
square = lambda n: n**2
Write this:
def square(n): return n**2
#Python #DailyPythonTip
Python Tip #35 (of 365):
When calling "functions", think in terms of "callables". 🧵
Most Python programmers occasionally use the word "function" to describe a class.
So when you see the word "function", unless we're talking about a function definiton, think "callable".
#Python #DailyPythonTip
When calling "functions", think in terms of "callables". 🧵
Most Python programmers occasionally use the word "function" to describe a class.
So when you see the word "function", unless we're talking about a function definiton, think "callable".
#Python #DailyPythonTip
February 4, 2026 at 7:04 PM
Python Tip #35 (of 365):
When calling "functions", think in terms of "callables". 🧵
Most Python programmers occasionally use the word "function" to describe a class.
So when you see the word "function", unless we're talking about a function definiton, think "callable".
#Python #DailyPythonTip
When calling "functions", think in terms of "callables". 🧵
Most Python programmers occasionally use the word "function" to describe a class.
So when you see the word "function", unless we're talking about a function definiton, think "callable".
#Python #DailyPythonTip
New screencast on where we play "the class or function game".
This is a game I often play with my students to demonstrate that the word "function" is a bit fuzzy in the #Python world.
This is a game I often play with my students to demonstrate that the word "function" is a bit fuzzy in the #Python world.
Is it a class or a function?
If a callable feels like a function, we often call it a function... even when it's not!
pym.dev
February 4, 2026 at 12:15 AM
New screencast on where we play "the class or function game".
This is a game I often play with my students to demonstrate that the word "function" is a bit fuzzy in the #Python world.
This is a game I often play with my students to demonstrate that the word "function" is a bit fuzzy in the #Python world.
Reposted by Trey Hunner
Folks, have you been overwhelmed by ~All This~ and wanting a gentle compassionate space to think about agentic coding??
Good news: if you're in SF & have free time tomorrow afternoon you can come hang out with me and @anthrocypher.bsky.social in a popup casual learning event ❤️
luma.com/rdw3dq4h
Good news: if you're in SF & have free time tomorrow afternoon you can come hang out with me and @anthrocypher.bsky.social in a popup casual learning event ❤️
luma.com/rdw3dq4h
Claude Code (Cr)afternoon · Luma
Have you seen people rave about Claude Code, and wondered whether agent-assisted coding is for you?
We're people who both work in and around software teams,…
luma.com
February 3, 2026 at 11:32 PM
Folks, have you been overwhelmed by ~All This~ and wanting a gentle compassionate space to think about agentic coding??
Good news: if you're in SF & have free time tomorrow afternoon you can come hang out with me and @anthrocypher.bsky.social in a popup casual learning event ❤️
luma.com/rdw3dq4h
Good news: if you're in SF & have free time tomorrow afternoon you can come hang out with me and @anthrocypher.bsky.social in a popup casual learning event ❤️
luma.com/rdw3dq4h
Python Tip #34 (of 365):
Remember that in Python, functions are objects. 🧵
If you need to call a bit of code later, you don't need to make a class with a method... you could just make a function!
#Python #DailyPythonTip
Remember that in Python, functions are objects. 🧵
If you need to call a bit of code later, you don't need to make a class with a method... you could just make a function!
#Python #DailyPythonTip
February 3, 2026 at 11:07 PM
Python Tip #34 (of 365):
Remember that in Python, functions are objects. 🧵
If you need to call a bit of code later, you don't need to make a class with a method... you could just make a function!
#Python #DailyPythonTip
Remember that in Python, functions are objects. 🧵
If you need to call a bit of code later, you don't need to make a class with a method... you could just make a function!
#Python #DailyPythonTip
Python Tip #33 (of 365):
Don't sleep on Python's keyword arguments / named arguments. 🧵
When you have the choice between a positional argument or a keyword argument, choose a keyword argument if it clarifies the argument's purpose.
#Python #DailyPythonTip
Don't sleep on Python's keyword arguments / named arguments. 🧵
When you have the choice between a positional argument or a keyword argument, choose a keyword argument if it clarifies the argument's purpose.
#Python #DailyPythonTip
February 2, 2026 at 7:04 PM
Python Tip #33 (of 365):
Don't sleep on Python's keyword arguments / named arguments. 🧵
When you have the choice between a positional argument or a keyword argument, choose a keyword argument if it clarifies the argument's purpose.
#Python #DailyPythonTip
Don't sleep on Python's keyword arguments / named arguments. 🧵
When you have the choice between a positional argument or a keyword argument, choose a keyword argument if it clarifies the argument's purpose.
#Python #DailyPythonTip
Python Tip #32 (of 365):
When processing potentially large untrusted files, don't iterate over them. 🧵
#Python #DailyPythonTip
When processing potentially large untrusted files, don't iterate over them. 🧵
#Python #DailyPythonTip
February 1, 2026 at 7:04 PM
Python Tip #32 (of 365):
When processing potentially large untrusted files, don't iterate over them. 🧵
#Python #DailyPythonTip
When processing potentially large untrusted files, don't iterate over them. 🧵
#Python #DailyPythonTip
Python Tip #31 (of 365):
If you need to preserve the original line endings when reading or writing a file, use newline="" when opening your file. 🧵
#Python #DailyPythonTip
If you need to preserve the original line endings when reading or writing a file, use newline="" when opening your file. 🧵
#Python #DailyPythonTip
January 31, 2026 at 7:04 PM
Python Tip #31 (of 365):
If you need to preserve the original line endings when reading or writing a file, use newline="" when opening your file. 🧵
#Python #DailyPythonTip
If you need to preserve the original line endings when reading or writing a file, use newline="" when opening your file. 🧵
#Python #DailyPythonTip
Python Tip #30 (of 365):
Consider file modes outside of read and write: you may (very occasionally) want a different mode. 🧵
#Python #DailyPythonTip
Consider file modes outside of read and write: you may (very occasionally) want a different mode. 🧵
#Python #DailyPythonTip
January 30, 2026 at 7:04 PM
Python Tip #30 (of 365):
Consider file modes outside of read and write: you may (very occasionally) want a different mode. 🧵
#Python #DailyPythonTip
Consider file modes outside of read and write: you may (very occasionally) want a different mode. 🧵
#Python #DailyPythonTip
Python Tip #29 (of 365):
When processing small files line-by-line, just read the whole thing into memory. 🧵
Reading files line-by-line with a "for" loop is a good practice for files that could be large, but for small files I would recommend reading the whole file at once.
#Python #DailyPythonTip
When processing small files line-by-line, just read the whole thing into memory. 🧵
Reading files line-by-line with a "for" loop is a good practice for files that could be large, but for small files I would recommend reading the whole file at once.
#Python #DailyPythonTip
January 29, 2026 at 10:42 PM
Python Tip #29 (of 365):
When processing small files line-by-line, just read the whole thing into memory. 🧵
Reading files line-by-line with a "for" loop is a good practice for files that could be large, but for small files I would recommend reading the whole file at once.
#Python #DailyPythonTip
When processing small files line-by-line, just read the whole thing into memory. 🧵
Reading files line-by-line with a "for" loop is a good practice for files that could be large, but for small files I would recommend reading the whole file at once.
#Python #DailyPythonTip
Python Tip #28 (of 365):
Read large files line-by-line by looping over them. 🧵
If you are working with a file that could be very large (such as a log file that could be gigabytes in size), don't read the whole file all at once.
#Python #DailyPythonTip
Read large files line-by-line by looping over them. 🧵
If you are working with a file that could be very large (such as a log file that could be gigabytes in size), don't read the whole file all at once.
#Python #DailyPythonTip
January 28, 2026 at 7:04 PM
Python Tip #28 (of 365):
Read large files line-by-line by looping over them. 🧵
If you are working with a file that could be very large (such as a log file that could be gigabytes in size), don't read the whole file all at once.
#Python #DailyPythonTip
Read large files line-by-line by looping over them. 🧵
If you are working with a file that could be very large (such as a log file that could be gigabytes in size), don't read the whole file all at once.
#Python #DailyPythonTip
New screencast about how all iteration is the same in Python.
In #Python (largely thanks to our embrace of duck typing), looping is looping.
In #Python (largely thanks to our embrace of duck typing), looping is looping.
All iteration is the same in Python
YouTube video by Python Morsels
youtu.be
January 28, 2026 at 12:13 AM
New screencast about how all iteration is the same in Python.
In #Python (largely thanks to our embrace of duck typing), looping is looping.
In #Python (largely thanks to our embrace of duck typing), looping is looping.
January 27, 2026 at 11:44 PM
I just added quiz questions to my introductory Python course, Python Jumpstart... a feature I wish I'd had on day 1!
All existing users will now see 64 quiz questions in Jumpstart.
In total, Jumpstart includes 60 instructional videos, 64 quizzes, & 48 exercises. It's now VERY hands-on.
All existing users will now see 64 quiz questions in Jumpstart.
In total, Jumpstart includes 60 instructional videos, 64 quizzes, & 48 exercises. It's now VERY hands-on.
Python Jumpstart
An exercise-first introduction to Python in bite-sized chunks. Each section consists of many 4 minute videos, each followed by 30 minute exercises. By the end of this course you'll have a solid founda...
pym.dev
January 27, 2026 at 11:18 PM
I just added quiz questions to my introductory Python course, Python Jumpstart... a feature I wish I'd had on day 1!
All existing users will now see 64 quiz questions in Jumpstart.
In total, Jumpstart includes 60 instructional videos, 64 quizzes, & 48 exercises. It's now VERY hands-on.
All existing users will now see 64 quiz questions in Jumpstart.
In total, Jumpstart includes 60 instructional videos, 64 quizzes, & 48 exercises. It's now VERY hands-on.
Python Tip #27 (of 365):
Consider printing to files instead of writing. 🧵
If you're converting objects to strings to write them to a file, I'd use print() instead.
And if you're putting newlines in string literals in your write() calls, I'd consider switching to print().
#Python #DailyPythonTip
Consider printing to files instead of writing. 🧵
If you're converting objects to strings to write them to a file, I'd use print() instead.
And if you're putting newlines in string literals in your write() calls, I'd consider switching to print().
#Python #DailyPythonTip
January 27, 2026 at 7:04 PM
Python Tip #27 (of 365):
Consider printing to files instead of writing. 🧵
If you're converting objects to strings to write them to a file, I'd use print() instead.
And if you're putting newlines in string literals in your write() calls, I'd consider switching to print().
#Python #DailyPythonTip
Consider printing to files instead of writing. 🧵
If you're converting objects to strings to write them to a file, I'd use print() instead.
And if you're putting newlines in string literals in your write() calls, I'd consider switching to print().
#Python #DailyPythonTip
Often there's a better way to write your code than using break in a loop.
Read more ‘‰ https://trey.io/xtql6h
#Python
trey.io
January 27, 2026 at 1:19 AM
Often there's a better way to write your code than using break in a loop.
Read more ‘‰ https://trey.io/xtql6h
#Python
You should implement dunder methods on your objects, but you shouldn't call dunder methods on other objects.
Read more ‘‰ https://trey.io/p0h32w
#Python
January 26, 2026 at 10:19 PM
You should implement dunder methods on your objects, but you shouldn't call dunder methods on other objects.
Read more ‘‰ https://trey.io/p0h32w
#Python