Lambda in a Loop is a Code Smell
Watch out for smelly code!
A common mistake in Python is to use a lambda function inside of a loop. While it's not always a problem, it should set off your senses to take a second look when you see a lambda inside a loop. If the lambda references a loop variable, you might not realize that the way that closures (or cell variables) work in Python means the lambda doesn't store the latest value of a variable that was present when the lambda is created. In this video I walk through a simplified real-world-code example where I made this mistake myself, including how to fix it.
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CHAPTERS
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0:00 Intro
0:12 What is a code smell?
0:43 Sponsoring myself!
1:11 Example setup
2:49 The symptoms
4:02 Why the lambda in a loop is bad
5:00 The partial fix
5:59 Exceptions to the rule
7:15 Prevent this before it ever happens
8:00 Thanks
Watch video Lambda in a Loop is a Code Smell online without registration, duration hours minute second in high quality. This video was added by user mCoding 02 October 2023, don't forget to share it with your friends and acquaintances, it has been viewed on our site 61,767 once and liked it 2.7 thousand people.