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here because they are just as related to functional programming as to looping statements.As a wrap-up for iteration concepts, we also measured the performance ofiteration alternatives. Finally, we reviewed common function-related mistakes tohelp you sidestep potential pitfalls.This concludes the functions part of this book. In the next part, we will study modules,the topmost organizational structure in Python, and the structure in which ourfunctions always live. After that, we will explore classes, tools that are largely packagesof functions with special first arguments. As we’ll see, everything we havelearned here will apply when functions pop up later in the book.Before you move on, though, make sure you’ve mastered function basics by workingthrough this chapter’s quiz and the exercises for this part.376 | Chapter 17: Advanced Function Topics