Check your understanding

What three methods does @dataclass write for you?
Why is available a @property rather than a normal attribute?
What's the difference between a module and a package?
Why is a generator memory-efficient?
Why should every test get a fresh fixture?

Answers

__init__, __repr__ and __eq__.
It's calculated from issued_to every time, so it can never go out of sync.
A module is one .py file. A package is a folder of modules with an __init__.py.
It produces one value at a time on demand, instead of holding the whole sequence in memory.
So one test's changes (issuing a book, say) can't make another test pass or fail. Tests must be independent and run in any order.

Now take the quiz. The pass mark is 7/10.

LABAIE-102· hands-on

Library lets members borrow forever

Fix a real ticket in a small codebase you didn't write: read the code, change only the functions you're given, pass the tests, then submit for hidden checks and a score.

Open the lab →