Vivis Dev
@vivis-dev.bsky.social
Python | AI | DevOps
Subscribe to my free python newsletter: https://pythonkoans.substack.com
Subscribe to my free python newsletter: https://pythonkoans.substack.com
Koan 6: The Forgetful Calligrapher
Understanding Late Binding in Python Closures
open.substack.com
August 5, 2025 at 12:51 PM
Unravelling how Python finds and binds names, and why variables sometimes behave like shadows.
pythonkoans.substack.com/p/koan-4-the...
pythonkoans.substack.com/p/koan-4-the...
Koan 4: The Grand Library
Understanding Python’s LEGB rule, closures, and how names echo through nested functions
pythonkoans.substack.com
August 5, 2025 at 12:49 PM
Unravelling how Python finds and binds names, and why variables sometimes behave like shadows.
pythonkoans.substack.com/p/koan-4-the...
pythonkoans.substack.com/p/koan-4-the...
#python list tips:
- reversed(list) is more memory efficient for reversing a list than slicing list[::-1] because it returns an iterator instead of a copy
- You can remove multiple items with slice assignment using list[1:4] = [] or del a[1:4]
- reversed(list) is more memory efficient for reversing a list than slicing list[::-1] because it returns an iterator instead of a copy
- You can remove multiple items with slice assignment using list[1:4] = [] or del a[1:4]
August 5, 2025 at 12:47 PM
#python list tips:
- reversed(list) is more memory efficient for reversing a list than slicing list[::-1] because it returns an iterator instead of a copy
- You can remove multiple items with slice assignment using list[1:4] = [] or del a[1:4]
- reversed(list) is more memory efficient for reversing a list than slicing list[::-1] because it returns an iterator instead of a copy
- You can remove multiple items with slice assignment using list[1:4] = [] or del a[1:4]
#python variable scoping can be confusing if you’re used to other programming languages.
A scope determines where a variable name is visible, and it’s lifetime.
Python checks for the variable definition in the following order, and stops at the first match
A scope determines where a variable name is visible, and it’s lifetime.
Python checks for the variable definition in the following order, and stops at the first match
August 5, 2025 at 12:46 PM
#python variable scoping can be confusing if you’re used to other programming languages.
A scope determines where a variable name is visible, and it’s lifetime.
Python checks for the variable definition in the following order, and stops at the first match
A scope determines where a variable name is visible, and it’s lifetime.
Python checks for the variable definition in the following order, and stops at the first match
It’s been a fun July writing Python Koans, I’m hoping to carry this momentum for the rest of the year!
If you have suggestions or topics you want me to cover, feel free to DM me!
#python
pythonkoans.substack.com
If you have suggestions or topics you want me to cover, feel free to DM me!
#python
pythonkoans.substack.com
Python Koans | Vivis Dev | Substack
Python lessons wrapped in koans. Small puzzles, deep truths. Not your usual tutorial thread. Click to read Python Koans, by Vivis Dev, a Substack publication with hundreds of subscribers.
pythonkoans.substack.com
August 5, 2025 at 12:44 PM
It’s been a fun July writing Python Koans, I’m hoping to carry this momentum for the rest of the year!
If you have suggestions or topics you want me to cover, feel free to DM me!
#python
pythonkoans.substack.com
If you have suggestions or topics you want me to cover, feel free to DM me!
#python
pythonkoans.substack.com
ChatGPT has started quietly nudging people towards their search extension. It's been out since December 2024, and has 4M users. Will this make a dent into Google?
June 3, 2025 at 4:52 AM
ChatGPT has started quietly nudging people towards their search extension. It's been out since December 2024, and has 4M users. Will this make a dent into Google?