Data Validation Using Early Return in Python

While working with data, I find validation logic tends to get messy faster than expected. It usually starts simple then a few more checks get added, and suddenly everything is wrapped in nested if statements. That pattern works, but it doesn’t feel great to read or maintain. That's how I learned Early return (or guard clause) pattern. Note: In programming, return means sending a value back from a function to wherever that function was called and stopping the function’s execution right there. Mea