Summary
I recorded this session to consolidate recent Python concepts and to clarify upcoming course logistics. I begin by revisiting function scope, emphasizing that variables created inside a function are not visible outside, while modifying an existing external variable inside the function changes the same memory location. I demonstrate formatting game data with immutable tuples and f‑strings, comparing three string‑construction styles—concatenation with '+=' and '\n', block f‑strings, and one‑liners—stressing the importance of consistent style for readability.
Next, I walk through completing the stub function courtRivalryGames, showing how to initialize a counter before a loop and increment it correctly. I contrast value‑returning functions, which use return <value>, with void functions that implicitly return None, and I explain early returns as a way to exit both the loop and the function immediately. I caution against returning different data types from the same function to simplify testing.
I then address midterm logistics: the exam will be on Friday, practice quizzes 1 and 2 should be finished, answer keys reviewed, and lecture slides used for study. Thursday’s lab remains for extra help, but Friday’s lab is cancelled.
After that, I introduce default (positional) arguments, noting that default values must follow non‑default parameters and cannot be mutable objects like lists. I reiterate that mutable defaults cause subtle bugs and that keyword arguments improve flexibility and readability by decoupling argument order. I advise replacing magic numbers with named constants.
I explain how an import statement effectively inlines the imported module’s code at runtime, then illustrate the random module with random.choice for selecting a random element from any iterable, encouraging consultation of the official documentation.
Finally, I preview the upcoming lab, which will apply these concepts to calculate ticket prices and catering bulk discounts. Action items: complete the practice quizzes, review the midterm study materials, attend Thursday’s lab, and prepare to use keyword arguments, proper default handling, and the random module in the next lab assignment.