What's The Point of `itemgetter()` in Python? * [Club]

"The first time I saw itemgetter(), I did what I'd normally do when I come across a new tool."

"I looked up the docs, opened a REPL, and explored a bit."

"And my reaction at first was: "So what?! This tool doesn't do anything I couldn't already do with other features in Python.""

itemgetter creates a function that retrieves a value from a sequence or mapping by index or key. Passing multiple indices returns a tuple of extracted items. itemgetter is commonly used as a key function for sorting, grouping, and mapping operations. The implementation in the operator module can be more concise and often faster than equivalent lambda expressions, especially in tight loops or large data sets. itemgetter improves code readability by expressing intent directly and avoiding inline anonymous functions. Related utilities such as attrgetter provide similar behavior for object attribute access. Using itemgetter aligns with idiomatic Python when simple item extraction is required.

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