Don't Over-Nest Your Comprehensions

List comprehensions in Python are fantastic for keeping your code concise, but there's a tipping point where they become unreadable "one-liners from hell." A good rule of thumb: if your comprehension requires more than one for loop or multiple if conditions, it’s usually better to write it out as a standard loop. Your future self and your teammates will thank you when they don't have to spend five minutes deciphering a single line of code during a bug hunt.