Using sorted() with key

This is one of Python's most powerful features for data processing. Without key functions, sorting a list of dictionaries by a specific field would require writing a custom comparison function or manually extracting values. With key, you express the sort criteria in a single line that Python handles efficiently. The key parameter represents a fundamental shift from imperative to declarative programming. Instead of writing code that compares elements step by step, you declare what value to use for comparison. Python handles the mechanics of actually performing the comparisons and swaps. This separation of concerns makes your code more readable and less prone to off-by-one errors or incorrect comparisons. Basic sorted() Usage Notice that sorted() works on any iterable and always produces a l