Data classes are a Python mechanism (`@dataclass` decorator) for reducing boilerplate in data-oriented classes—classes whose primary purpose is to hold structured data rather than encapsulate behavior. The decorator auto-generates common methods (initializer, `__repr__`/`__str__`, equality comparison) from type-annotated class-level attribute declarations, while supporting configurable field-level behavior (default values, default factories, inclusion in `__init__`/`repr`, post-initialization hooks) and class-level behavior (immutability via `frozen`, keyword-only initialization, structural pattern matching support, and `__dict__`-vs-`__slots__` storage strategy for attribute access performance).
Data classes are a Python mechanism (`@dataclass` decorator) for reducing boilerplate in data-oriented classes—classes whose primary purpose is to hold structured data rather than encapsulate behavio…