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. ― mCoding with James Murphy (https://mcoding.io/) Source code: https://github.com/mCodingLLC/VideosSampleCode Closures video: https://www.youtube.com/watch?v=jXugs4B3lwU Local vs global lookup video: https://www.youtube.com/watch?v=9v8eu4MOet8 SUPPORT ME ⭐ --------------------------------------------------- Sign up on Patreon to get your donor role and early access to videos! https://patreon.com/mCoding Feeling generous but don't have a Patreon? Donate via PayPal! (No sign up needed.) https://www.paypal.com/donate/?hosted_button_id=VJY5SLZ8BJHEE Want to donate crypto? Check out the rest of my supported donations on my website! https://mcoding.io/donate Top patrons and donors: Jameson, Laura M, Dragos C, Vahnekie, Neel R, Matt R, Johan A, Casey G, Mark M, Mutual Information, Pi BE ACTIVE IN MY COMMUNITY 😄 --------------------------------------------------- Discord: https://discord.gg/Ye9yJtZQuN Github: https://github.com/mCodingLLC/ Reddit: https://www.reddit.com/r/mCoding/ Facebook: https://www.facebook.com/james.mcoding CHAPTERS --------------------------------------------------- 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