Lesson 3: Paths and collections: files, tallies and groups

Module 7 · Lesson 3 · About 45 minutes · Needs: Module 5 (lists, tuples, dictionaries, list comprehensions), Module 6 (functions), Module 7 Lessons 1 and 2 (import, date, timedelta)

The situation

Amira has two questions this morning. First: "Where do the shelf's files live, and is the loans file really there?" Second: "Who borrows the most, and what does each member have out right now?"

Python ships tools for both in its standard library, the modules that come with every Python: pathlib for files and folders, and collections for tallies, groups and small records. You will follow one member throughout: Kwame (M04), who borrows the most and has three books out today.