🤔 Not sure if you knew... But the auxiliary variables of Python 🐍 `for` loops don't disappear after the loop is done 👇 Below, `idx` traverses the range and, when the loop is done, `idx` still exists. This can be useful to preserve some info if/when you `break` a loop!

Have you heard about Python 🐍 argument default values? 🧐 You probably have, but did you know it's dangerous to use mutable objects as default values? Here's what happens with a list that was supposed to be empty every function call 👇