Quiz: Python Dataclasses

Review

1. Which behavior does @dataclass generate by default?

   The default decorator options generate initialization, representation, and equality methods, but not ordering methods or automatic type validation.
2. What do field annotations primarily tell @dataclass?

   Dataclass examines annotated class variables to determine its fields; it does not generally enforce their annotation types.
3. Why use field(default_factory=list) for a list field?

   The factory is called for each instance that needs a default, so lists are not shared between instances.
4. What is a suitable job for __post_init__?

   The generated initializer calls __post_init__ after assigning init fields, making it a place for related validation or derived state.
5. Which statement about frozen=True is correct?

   Frozen dataclasses block ordinary field assignment; mutable objects stored inside fields can still mutate unless they themselves are immutable.